Provided is a dental composition from which there can be obtained a cured product having a large photocurable depth, high mechanical strength, low polymerization shrinkage stress, and high surface hardness. The dental composition comprises a monomer (A), a polymerization initiator (B), and a filler (C). The monomer (A) comprises a monomer (A-1) represented by formula (1) and a monomer (A-2) which is other than the monomer (A-1). The filler (C) is included at 50-90 mass% in 100 mass% of the dental composition. [The symbols in formula (1) are as defined in the description of the present application.]
To provide MnZnCo—based ferrite with small magnetic losses over a wide frequency range and a wide temperature range. Disclosed is MnZnCo—based ferrite containing basic components and auxiliary components, in which the basic components are Fe2O3: 51.00 mol % or more and less than 58.00 mol %, ZnO:6.00 mol % or more and less than 13.00 mol %, and CoO:more than 0.10 mol % and 0.50 mol % or less, with the balance being MnO, and the auxiliary components are 50 mass ppm to 500 mass ppm of Si in terms of SiO2, 200 mass ppm to 2000 mass ppm of Ca in terms of CaO, 85 mass ppm to 500 mass ppm of Nb in terms of Nb2O5, and 5 mass ppm to 20 mass ppm of K, relative to the basic components.
C04B 35/26 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
3.
CARBON-COATED NON-GRAPHITIZABLE CARBON, LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE, AND LITHIUM ION SECONDARY BATTERY
Carbon-coated non-graphitizable carbon used for a negative electrode for a lithium-ion secondary battery, a negative electrode for a lithium-ion secondary battery using the carbon-coated non-graphitizable carbon, and a lithium-ion secondary battery including the negative electrode for a lithium-ion secondary battery are disclosed. The carbon-coated non-graphitizable carbon is carbon-coated non-graphitizable carbon comprising: non-graphitizable carbon; and a carbon coating layer provided on a surface of the non-graphitizable carbon, wherein an average thickness of the carbon coating layer is 4 nm or more and 30 nm or less, and a minimum value of a thickness of the carbon coating layer is 70% or more of a maximum value of the carbon coating layer.
H01M 4/583 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx
H01M 4/02 - Electrodes composed of, or comprising, active material
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
4.
CARBON MATERIAL–COATED GRAPHITE PARTICLES, LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE, LITHIUM ION SECONDARY BATTERY, AND PRODUCTION METHOD FOR CARBON MATERIAL–COATED GRAPHITE PARTICLES
There is provided carbonaceous substance-coated graphite particles that are excellent in all of output characteristic, fast charging characteristic, and cycle characteristic when used as a negative electrode material for a lithium ion secondary battery. The carbonaceous substance-coated graphite particles include graphite particles and a carbonaceous substance covering at least part of surfaces of the graphite particles. A mass reduction starting temperature when the carbonaceous substance-coated graphite particles are heated in a water vapor atmosphere is 800°C to 980°C, and a content of the carbonaceous substance is 0.1 to 15.0 parts by mass with respect to 100.0 parts by mass of the graphite particles.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/587 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
5.
CARBONACEOUS MATERIAL-COATED GRAPHITE PARTICLES, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, LITHIUM ION SECONDARY BATTERY, AND METHOD FOR PRODUCING CARBONACEOUS MATERIAL-COATED GRAPHITE PARTICLES
There is provided carbonaceous substance-coated graphite particles that exhibit an excellent cycle capacity maintaining characteristic when used as a negative electrode material for a lithium ion secondary battery. The carbonaceous substance-coated graphite particles include: graphite particles; and a carbonaceous substance covering at least part of surfaces of the graphite particles. An elastic modulus of the carbonaceous substance-coated graphite particles determined using a scanning probe microscope is not less than 10 GPa.
Provided is a petroleum-based soft pitch mixture having a low polycyclic aromatic hydrocarbon concentration, wherein the viscosity of the petroleum-based soft pitch mixture is easily adjusted according to the use. Further provided is a closing material for a molten metal tapping hole, with which the discharge amount of polycyclic aromatic hydrocarbons can be made small during use. This petroleum-based soft pitch mixture is obtained by mixing a petroleum-based soft pitch having a softening point of 40°C or higher and lower than 150°C and a distillate oil having a boiling point ranging between 230°C and 280°C, wherein the content of the distillate oil is 10%-45% by mass, and the remainder is the petroleum-based soft pitch and inevitable impurities. This closing material for a molten metal tapping hole is obtained by mixing the petroleum-based soft pitch mixture as a binder into a refractory raw material. The contents of benzo[a]pyrene and naphthalene as the polycyclic aromatic hydrocarbons are controlled.
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
9.
CARBON MATERIAL–COATED GRAPHITE PARTICLES, LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE, LITHIUM ION SECONDARY BATTERY, AND PRODUCTION METHOD FOR CARBON MATERIAL–COATED GRAPHITE PARTICLES
Provided are carbon material–coated graphite particles that, when used as a negative electrode material for a lithium ion secondary battery, produce excellent output characteristics, rapid charging characteristics, and cycle characteristics. The carbon material–coated graphite particles comprise graphite particles and a carbon material that coats at least a portion of the surface of the graphite particles. When the carbon material–coated graphite particles are heated under an atmosphere of steam, the temperature at which a decrease in mass begins is 800°C–980°C. The carbon material content of the carbon material–coated graphite particles is 0.1–15.0 parts by mass per 100.0 parts by mass of the graphite particles.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/587 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
10.
CARBONACEOUS MATERIAL-COATED GRAPHITE PARTICLES, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, LITHIUM ION SECONDARY BATTERY, AND METHOD FOR PRODUCING CARBONACEOUS MATERIAL-COATED GRAPHITE PARTICLES
The present invention provides carbonaceous material-coated graphite particles which exhibit excellent cycle capacity retention properties if used as a negative electrode material of a lithium ion secondary battery. The carbonaceous material-coated graphite particles each comprise a graphite particle and a carbonaceous material which covers at least a part of the surface of the graphite particle, and the elastic modulus as determined using a scanning probe microscope is 10 GPa or more.
Provided is a granulated powder capable of producing a MnZn-based ferrite that exhibits the excellent mechanical properties of not only having a high average of M strengths of sintered bodies of E-type cores in accordance with JIS C2560 (type: E42/15), but also avoiding the occurrence of samples with significantly low strength, and that exhibits good magnetic properties with a loss value of at most 380 kW/m323232255; and the torque ratio is at least 1.7.
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/36 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
12.
POLYIMIDE, POLYIMIDE SOLUTION, COATING MATERIAL, AND FORMATION MATERIAL
Provided is a polyimide which exhibits excellent solubility in a solvent. This polyimide is obtained by polymerizing an acid component which contains 3,3',4,4'-biphenyltetracarboxylic dianhydride and a diamine component which contains 20.0-80.0 mol% of a specific compound A and 20.0-80.0 mol% of 2,2-bis-[4-(4-aminophenoxy)phenyl]propane.
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
C04B 35/26 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites
C04B 35/32 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with cobalt oxide as the principal oxide
C04B 35/34 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with cobalt oxide as the principal oxide with zinc oxide
C04B 35/36 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide
H01F 1/03 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity
H01F 1/10 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
The present invention provides a hardly-graphitizable carbon having a high discharge capacity, a negative electrode for a lithium-ion secondary battery, and a lithium-ion secondary battery. The hardly-graphitizable carbon according to the present invention has a Guinier radius Rg1 of 3.00-5.80 nm in a scattering vector q range of from 0.30 nm-1to 0.40 nm-1, the Guinier radius Rg1 being measured by small angle X-ray scattering and determined through Guinier analysis. The hardly-graphitizable carbon also has a Guinier radius Rg2 of 0.35-0.57 nm in a scattering vector q range of from 2.05 nm-1to 2.85 nm-1 and has an average lattice interplanar spacing d002 of (002) planes of 0.365-0.375 nm, as determined by X-ray analysis.
The present invention addresses the problem of providing: a carbon-coated non-graphitizable carbon which can achieve both high discharging capacity and initial efficiency when using the same in a lithium ion secondary battery negative electrode; a lithium ion secondary battery negative electrode using the carbon-coated non-graphitizable carbon; and a lithium ion secondary battery having the lithium ion secondary battery negative electrode. A carbon-coated non-graphitizable carbon according to the present invention is composed of a non-graphitizable carbon and a carbon-coating layer for coating the surface thereof. The average thickness of the carbon-coating layer is 4-30 nm. The minimum value of the thickness of the carbon-coating layer is 70% or more of the maximum value of that of the carbon-coating layer.
The purpose of the present invention is to provide: a hardly graphitizable carbon which enables the achievement of a high discharge capacity; a negative electrode for lithium ion secondary batteries; and a lithium ion secondary battery. A hardly graphitizable carbon according to the present invention has a strain e of 0.081 to 0.120 as determined by a Williamson-Hall method using a profile that is obtained by performing a Rietveld analysis on the X-ray diffraction pattern thereof, while having a lattice spacing d002 of 0.360 nm to 0.370 nm, the lattice spacing d002 corresponding to the 002 reflection, as determined by performing a Rietveld analysis on the X-ray diffraction pattern.
The purpose of the present invention is to provide: a hardly graphitizable carbon which enables the achievement of a high discharge capacity; a negative electrode for lithium ion secondary batteries; and a lithium ion secondary battery. A hardly graphitizable carbon according to the present invention has a strain ε of 0.081 to 0.120 as determined by a Williamson-Hall method using a profile that is obtained by performing a Rietveld analysis on the X-ray diffraction pattern thereof, while having a lattice spacing d002 of 0.360 nm to 0.370 nm, the lattice spacing d002 corresponding to the 002 reflection, as determined by performing a Rietveld analysis on the X-ray diffraction pattern.
The present invention addresses the problem of providing a polyimide precursor composition that makes it possible to obtain a polyimide film having low coloration, and a polyimide obtained from the composition. A polyimide precursor composition according to the present invention contains a compound represented by formula (A) and a polyamic acid obtained by polycondensing a diamine and a carboxylic dianhydride, the content value for the compound being 0.5-5.0 mol% relative to the carboxylic dianhydride content. In formula (A), L represents a single bond or a divalent linking group.
The present invention addresses the problem of providing a method for producing trisphenolmethane that has excellent productivity and with which it is possible to obtain a high purity trisphenolmethane that exhibits excellent transparency when used as a curing agent or a raw material for an epoxy resin. This method for producing a trisphenolmethane has: a trisphenolmethane synthesis step for causing a phenol (A) and an aromatic hydroxy aldehyde (B) to react in the presence of a Lewis acid catalyst (C) to synthesize a trisphenolmethane; a catalyst deactivation step for adding a catalyst deactivator (D) to the reaction liquid to deactivate the Lewis acid catalyst (C); a phenol addition step for adding a phenol (E) to the reaction liquid; a filtration step for filtering the reaction liquid to remove the Lewis acid catalyst (C) and the catalyst deactivator (D) from the reaction liquid; and a phenol removal step for removing the phenol from the filtrate to obtain the trisphenolmethane.
C07C 37/20 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions increasing the number of carbon atoms using aldehydes or ketones
C08G 8/08 - Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ
25.
Method for producing carbonaceous substance-coated graphite particles
Resin-adhered graphite particles are obtained by causing a modified novolac-type phenolic resin to adhere to graphite particles. At least part of surfaces of the graphite particles is coated with a carbonaceous coating by heating the resin-adhered graphite particles in a non-oxidizing atmosphere at 900 to 1,500° C. to carbonize the modified novolac-type phenolic resin. Arylene groups having hydroxy groups account for 5 to 95 mol % of arylene groups constituting the modified novolac-type phenolic resin. The obtained carbonaceous substance-coated graphite particles exhibit excellent battery properties when used as a negative electrode material for a lithium ion secondary battery.
The present invention provides carbonaceous material-coated graphite particles that exhibit excellent output characteristics if used as a negative electrode material of a lithium ion secondary battery. The carbonaceous material-coated graphite particles comprise graphite particles, and a carbonaceous coating material that covers at least a part of the respective surfaces of the graphite particles; the maximum particle diameter is 30.0 to 90.0 µm; the pore volume VS corresponding to the pores having a pore size of 7.8 to 36.0 nm is 0.009 to 0.164 cm3/g; and in the pore size distribution chart in which the pore size is plotted on the horizontal axis and dV/dP that is obtained by differentiating the pore volume by the pore size is plotted on the vertical axis, the pore size Pmax at which the dV/dP is maximum is 2.5 to 5.5 nm.
Provided are carbon-coated graphite particles having excellent battery characteristics when used as a negative electrode material in a lithium-ion secondary battery. The carbon-coated graphite particles each comprise a graphite particle and a carbon coating which coats at least a portion of the surface of the graphite particle. The specific surface area SBET found using the BET method is 4.0-15.0 m2/g. The pore volume VS corresponding to pores having a pore size from 7.8-36.0 nm is from 0.001-0.026 cm3/g. In a pore size distribution diagram obtained by plotting pore size on the horizontal axis and plotting dV/dP, which is a value obtained by differentiating the pore volume by the pore size, on the vertical axis, the pore size Pmax at which the dV/dP is greatest is from 2.5-5.5 nm.
Provided is spherically-shaped coated graphite exhibiting excellent cycle capacity-maintaining property when used as a negative electrode material for a lithium ion secondary battery. The spherically-shaped coated graphite includes: spherically-shaped graphite in which primary particles with an equivalent spherical diameter of not more than 0.8 μm have a volume ratio of more than 40.0% and not more than 70.0%, and primary particles with an equivalent spherical diameter of not less than 1.5 μm and not more than 3.0 μm have a volume ratio of not less than 3.0% and not more than 17.0%, in a particle size distribution of primary particles obtained using X-ray computed tomography; and a carbonaceous substance covering the spherically-shaped graphite, and a pore volume of pores with a pore size of 7.8 nm to 36.0 nm is not more than 0.017 cm3/g, and a mass of infiltrated dibutyl phthalate is less than 0.70 g/cm3
BETBET found using the BET method is 4.0-15.0 m2SS corresponding to pores having a pore size from 7.8-36.0 nm is from 0.001-0.026 cm3maxmax at which the dV/dP is greatest is from 2.5-5.5 nm.
The present invention provides a coated spheroidized graphite which exhibits excellent cycle capacity retention properties if used as a negative electrode material of a lithium ion secondary battery. This coated spheroidized graphite contains a spheroidized graphite wherein the volume fraction of primary particles having a sphere equivalent diameter of 0.8 µm or less is more than 40.0% but not more than 70.0% and the volume fraction of primary particles having a sphere equivalent diameter of 1.5 µm to 3.0 µm is 3.0% to 17.0% in the particle size distribution of the primary particles as determined with use of X-ray CT, and a carbonaceous material that covers the spheroidized graphite; the pore volume of pores having a pore diameter of 7.8 nm to 36.0 nm is 0.017 cm3/g or less; and the mass of permeated dibutyl phthalate is less than 0.70 g/cm3.
Provided is a polyimide resin excelling in solubility in a solvent, mechanical characteristics, and electrical characteristics. The polyimide resin is obtained by polymerizing a diamine component and an acid component. In the diamine component, a diamine compound A represented by formula (A) below accounts for 30.0-93.0 mol%, and 4,4'-oxydianiline accounts for 7.0-65.0 mol%, and in the acid component, pyromellitic dianhydride accounts for 1.0-70.0 mol%, and 3,3',4,4'-benzophenonetetracarboxylic acid dianhydride accounts for 23.0-92.0 mol%. In formula (A), R1, R2, R3and R4each represent hydrogen or an organic group having 1-4 carbons, and R1and R2 may form a closed ring.
The present invention provides a low-cost and industrially simple method for producing a graphite material that has achieved, as a negative electrode material for lithium ion secondary batteries, high electrode density, high discharge capacity, excellent initial charge and discharge efficiency, and excellent high-rate charge and discharge characteristics (high-rate charge efficiency and high-rate discharge efficiency), in particular, a graphite material that has both excellent initial charge and discharge efficiency and excellent high-rate charge and discharge characteristics. The above-described production method comprises: a grinding step in which a mesophase microsphere calcined material is ground; a graphitization step in which a ground material obtained in the grinding step is graphitized in the presence of elemental silicon and elemental iron; a crushing step in which a graphitized material obtained in the graphitization step is crushed; an attachment step in which a carbonaceous substance precursor is attached to a crushed material obtained in the crushing step; and a coating step in which the carbonaceous substance precursor is turned into a carbonaceous substance by calcining the crushed material, to which the carbonaceous substance precursor has been attached, thereby coating the crushed material with the carbonaceous substance.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/587 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
34.
Carbon material for negative electrode of lithium ion secondary battery and method of producing the same, and negative electrode and lithium ion secondary battery using the carbon material
3 or more, and a Raman R value obtained by Raman spectroscopy is more than 0.100 and less than 0.300, and the carbon material has a carbonaceous film on a surface of graphitized material particles of a mesophase microbead.
Provided is an MnZn-based ferrite having both: excellent mechanical characteristics in which the fracture toughness value of a flat plate-like core measured in conformity to JIS R1607 is not less than 1.00 MPa•m1/2; and excellent magnetic characteristics in which the value of an initial permeability, at 23°C and at 100 kHz, of a toroidal core produced in the same condition is not less than 4000. This MnZn-based ferrite comprises a basic component, a sub-component, and unavoidable impurities. In the unavoidable impurities, the respective contained amounts of P, B, Na, Mg, Al, and K are limited to less than 10 mass ppm of P, less than 10 mass ppm of B, less than 200 mass ppm of Na, less than 200 mass ppm of Mg, less than 250 mass ppm of Al, and less than 100 mass ppm of K.
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
Provided is a MnZn ferrite having both the superior mechanical property of a fracture toughness value, in a flat plate-like core, of 1.10 MPa•m1/2or greater as measured in accordance with JIS R1607, and the excellent magnetic property, of a loss value of 450 kW/m3 or less at 100ºC, 300 kHz, and 100 mT, in a toroidal core fabricated under the same conditions. The MnZn ferrite comprises basic components, auxiliary components, and unavoidable impurities. The respective contents of P, B, Na, Mg, Al and K in the unavoidable impurities are suppressed such that P is less than 10 ppm by mass, B is less than 10 ppm by mass, Na is less than 200 ppm by mass, Mg is less than 200 ppm by mass, Al is less than 250 ppm by mass, and K is less than 100 ppm by mass.
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
Provided is an MnCoZn-based ferrite having an excellent mechanical property, that is to say, a fracture toughness value of 1.00 MPa·m1/2 or greater as measured according to JIS R1607 for a flat-plate-shaped core, combined with excellent magnetic properties, that is to say, a specific resistance of 30 Ω·m or greater, a Curie temperature of 100°C or higher, a magnetic coercivity of 15.0 A/m or less for a toroidal shape core produced under the same conditions, and an initial permeability value of 150 or greater at 23°C and 10 MHz. The MnCoZn-based ferrite comprises a fundamental ingredient, a secondary ingredient, and unavoidable impurities. In the MnCoZn-based ferrite, the contents of P, B, Na, Mg, Al, and K in the unavoidable impurities are limited to less than 10 mass ppm for P, less than 10 mass ppm for B, less than 200 mass ppm for Na, less than 200 mass ppm for Mg, less than 250 mass ppm for Al, and less than 100 mass ppm for K, respectively.
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
38.
METHOD FOR PRODUCING GRAPHITE PARTICLES COATED WITH CARBONACEOUS FILM
A modified novolak-type phenol resin is adhered to graphite particles to obtain resin-adhered graphite particles. The resin-adhered graphite particles are heated at 900-1500°C in a non-oxidizing atmosphere to carbonize the modified novolak-type phenol resin, whereby at least a portion of the surface of the graphite particles is coated with a carbonaceous film. 5-95 mol% of arylene groups constituting the modified novolak-type phenol resin have a hydroxy group. When the obtained graphite particles coated with a carbonaceous film are used for a negative electrode material for a lithium-ion secondary battery, excellent battery characteristics can be achieved.
Provided is spheroidized graphite having excellent output characteristics when used as a negative electrode material of a lithium-ion secondary battery. In the spheroidized graphite, the volume ratio of primary particles having a sphere-equivalent diameter of 0.8 μm or lower is 40.0% or less and the volume ratio of primary particles having a sphere-equivalent diameter of 1.5-3.0 μm inclusive is 13.0% or less in the particle size distribution of primary particles obtained using x-ray CT.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/587 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
40.
NEGATIVE ELECTRODE CARBON MATERIAL FOR LITHIUM ION SECONDARY BATTERY, PRODUCTION METHOD THEREFOR, AND NEGATIVE ELECTRODE AND LITHIUM ION SECONDARY BATTERY USING SAME
50BETBET) according to the BET method is 6.5m2TAPTAP) is 0.70 g/cm3 or more, and the Raman R value determined by Raman spectroscopy exceeds 0.100 and is less than 0.300. The carbon material is characterized by comprising a carbonaceous coating film on the surface of graphitized particles of mesophase spherules.
CARBONACEOUS MATERIAL, METHOD FOR PRODUCING CARBONACEOUS MATERIAL, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY
The present invention provides a carbonaceous material which enables the achievement of excellent battery characteristics if used as a negative electrode material of a lithium ion secondary battery. A carbonaceous material according to the present invention has a minimum particle diameter of more than 3.00 μm, a circularity of from 0.82 to 0.94, an aspect ratio of from 1.48 to 1.65, and a Raman R value of more than 0.40.
The present invention provides a method for manufacturing a graphite material which is industrially convenient and cheap and which exhibits high electrode density, high discharge capacity, and excellent quick charge and discharge properties as a negative electrode material for lithium-ion secondary batteries. This method for manufacturing a graphite material comprises a pulverizing step for pulverizing a mesophase microsphere fired product, a graphitizing step for graphitizing the pulverized product obtained in the pulverizing step in the presence of elemental silicon and iron, and a crushing step of crushing the graphitized product obtained in the graphitizing step.
Provided are: a polyimide having a small yellow index and excellent heat resistance; and a polyimide solution containing said polyimide. The polyimide is a mixture of a polyimide (I) including a specific repeating unit represented by formula (1) and a polyimide (II) including a specific repeating unit represented by formula (2), the content of the polyimide (I) is 5-95 mass%, and the content of the polyimide (II) is 95-5 mass%.
The present invention provides a method for producing a graphitized bulk mesophase which has a high discharge capacity per mass and enables the production of a lithium ion secondary battery negative electrode material having a small electrode expansion rate when charging and discharging are carried out continuously. The method for producing a graphitized bulk mesophase according to the present invention comprises: a heat treatment step of subjecting tar and/or pitch each having a primary QI (quinoline insoluble material) content of 1% by mass or less to a heat treatment to produce a bulk mesophase; a oxidative stabilization step of oxidatively stabilizing the bulk mesophase produced in the heat treatment step to produce an oxidatively stabilized bulk mesophase; a burning step of adding a graphitization catalyst to the oxidatively stabilized bulk mesophase produced in the oxidative stabilization step and then burning the oxidatively stabilized bulk mesophase to produce a burnt bulk mesophase; and a graphitization step of graphitizing the burnt bulk mesophase produced in the burning step to produce a graphitized bulk mesophase.
The present invention provides an MnZn-based ferrite having exceptional magnetic properties and exceptional mechanical properties, the MnZn-based ferrite being suitable for use in electronic parts for mounting in automobiles. In this MnZn-based ferrite: the basic components and accessory components are adjusted to suitable ranges; the amounts of P, B, and Ti, which are unavoidable impurities, are suppressed so as to be less than 10 mass ppm of P, less than 10 mass ppm of B, and less than 50 mass ppm of Ti; and the surface residual stress value is less than 40 MPa.
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
Provided is a MnCoZn ferrite that has excellent magnetic characteristics and mechanical characteristics and that is suitable for use in electronic components to be mounted to an automobile. In the MnCoZn ferrite, basic components and secondary components are adjusted to appropriate ranges, and the amounts of unavoidable impurities, namely, P, B, and Ti are controlled so that P is less than 10 mass ppm, B is less than 10 mass ppm, and Ti is less than 50 mass ppm. In addition, the surface residual stress is set to a value of less than 40 MPa.
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
47.
MnZn-BASED FERRITE AND METHOD FOR MANUFACTURING SAME
Provided is a MnZn-based ferrite that has excellent magnetic and mechanical properties, and can be suitably used for vehicle-mounted electronic components. This MnZn-based ferrite has a basic component and a sub component adjusted to within appropriate ranges, has the amounts of P, B, and Ti, which are inevitable impurities, limited to less than 10 mass ppm, less than 10 mass ppm, and less than 50 mass ppm, respectively, and has a surface residual stress of less than 40 MPa.
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
48.
MNZN-BASED FERRITE AND METHOD FOR MANUFACTURING SAME
Provided is an MnZn-based ferrite having small loss and a high fracture toughness value. In the MnZn-based ferrite, the basic components and the auxiliary components are adjusted to a proper range, the amounts of P and B which are unavoidable impurities are limited to less than 10 massppm and less than 10 massppm, respectively, the ratio of the number of voids in crystal grains to the number of all of voids in the MnZn-based ferrite is less than 40%, the loss value of the MnZn-based ferrite at 100°C, 300 KHz and 100 mT is 450 kW/m3or less, and the fracture toughness value as measured in accordance with JIS R 1607 is 1.10 MPa∙m1/2 or more.
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
Provided is MnCoZn ferrite which has: superior magnetic characteristics in terms of a high Curie temperature and a high specific resistance, and initial magnetic permeability at 23°C and 10 Mhz, as well as low coercive force at 23°C; and superior mechanical characteristics in terms of a high fracture toughness value as measured in compliance with JISR 1607 for a flat sample. The basic components and sub-components of the MnCoZn ferrite are adjusted to appropriate ranges, and amounts of P and B, which are unavoidable impurities, are suppressed to below 10 mass ppm for P and below 10 mass ppm for B, respectively. Furthermore, the number of voids in the crystal grain relative to the total number of voids in the MnCoZn ferrite is set to less than 55%; the initial magnetic permeability value of the MnCoZn ferrite at 23°C and 10 MHz is set to 150 or more; the specific resistance is set to 30 Ω•m or more; the coercive force at 23°C is set to 15 A/m or less; the Curie temperature is set to 100°C or more; and the fracture toughness as measured in compliance with JISR 1607 is set to 1.00 MPa•m1/2 or more.
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
50.
MNZN-BASED FERRITE AND METHOD FOR MANUFACTURING SAME
Provided is a MnZn-based ferrite having a high initial permeability and a high fracture toughness value. In the MnZn-based ferrite, the basic components and the auxiliary components are adjusted to a proper range, the amounts of P and B which are unavoidable impurities are limited to less than 10 massppm and less than 10 massppm, respectively, the ratio of the number of voids in crystal grains to the number of all of voids in the MnZn-based ferrite is less than 55%, the initial permeability at 23°C and 100kHz is 4000 or more, and the fracture toughness value as measured in accordance with JIS R 1607 is 1.00 MPa∙m1/2 or more.
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
Provided is an industrially favorable method for producing 3-acetoxystyrene. Said production method is a method for producing 3-acetoxystyrene represented by formula (2), the method being characterized by performing a Heck reaction on 3-acetoxyhalobenzene(where X represents F, Cl, Br or I) represented by formula SHIM화학식 formula 수학식에서 특히 등식, equation 이미 한차례 설명했음.(1).
C07C 67/293 - Preparation of carboxylic acid esters by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group by isomerisationPreparation of carboxylic acid esters by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group by change of size of the carbon skeleton
C07C 69/157 - Acetic acid esters of monohydroxylic compounds of unsaturated alcohols containing six-membered aromatic rings
Provided are: a method for producing fluorenylidene diallylphenols represented by formula (1), the method including a reaction step for reacting fluorenones represented by formula (2) and allylphenols represented by formula (3) in the presence of an acid catalyst, excluding compounds having mercapto groups, the amount of acid catalyst being 0.001-20 mol per mol of compound represented by formula (2); and fluorenylidene diallylphenols represented by formula (4).
C07C 37/20 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions increasing the number of carbon atoms using aldehydes or ketones
C07C 39/23 - Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic, containing six-membered aromatic rings and other rings, with unsaturation outside the aromatic rings
B01J 27/02 - Sulfur, selenium or telluriumCompounds thereof
C07C 65/19 - Compounds having carboxyl groups bound to carbon atoms of six-membered aromatic rings and containing any of the groups OH, O-metal, —CHO, keto, ether, groups, groups, or groups containing hydroxy or O-metal groups having unsaturation outside the aromatic ring
C07C 51/367 - Preparation of carboxylic acids or their salts, halides, or anhydrides by reactions not involving formation of carboxyl groups by introduction of functional groups containing oxygen only in singly bound form
C07C 39/42 - Halogenated derivatives containing six-membered aromatic rings and other rings
C07C 41/30 - Preparation of ethers by reactions not forming ether-oxygen bonds by increasing the number of carbon atoms, e.g. by oligomerisation
C07C 43/23 - Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring containing hydroxy or O-metal groups
53.
PASTE COMPOSITION, ELECTRODE MATERIAL FOR SECONDARY BATTERIES, ELECTRODE FOR SECONDARY BATTERIES, AND SECONDARY BATTERY
The present invention provides a paste composition which enables the production of a secondary battery that has high safety against heat. This paste composition contains: a hemiacetal ester derivative represented by formula (1); a polyamine represented by formula (2); an active material for secondary batteries; and an aqueous medium.
This method for preparing a tar acid includes: a dewatering step for dewatering a crude tar acid; a depitching step for depitching a dewatered crude tar acid; and a continuous distillation step for continuously distilling a depitched crude tar acid, wherein after the dewatering step and before the depitching step or during the depitching step, an oxidant is added to the dewatered crude tar acid, and the column bottom temperature of a distillation column in the depitching step is 160°C or less.
The present invention addresses the problem of providing a method for manufacturing a negative electrode material for a lithium ion secondary battery having excellent productivity. This method for manufacturing a negative electrode material for a lithium ion secondary battery comprises: a filling step in which the interior of a bag is filled with graphite precursor powder, and thereafter deaerated, decompressed, and kept in a decompressed state; and a graphitization step in which the graphite precursor powder is graphitized by heating the bag the interior of which is filled with the graphite precursor powder and kept in the decompressed state.
2322 and 300–1,300 mass ppm of CaO. The P, B, S, Cl, Bi, and Zr of the unavoidable impurities are suppressed to less than 50 mass ppm of P, less than 20 mass ppm of B, less than 30 mass ppm of S, less than 50 mass ppm of Cl, less than 20 mass ppm of Bi, and less than 20 mass ppm of Zr. As a result, the MnCoZn ferrite has a rattler value of less than 0.85%, a squareness ratio of no more than 0.35 at 100°C, a relative resistivity of at least 30 Ω∙m, and a Curie temperature of at least 170°C.
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
H01F 1/36 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
2322 and 300–1,300 mass ppm of CaO. The Cd, Pb, Sb, As, Se, Bi, and Zr of the unavoidable impurities are suppressed to less than 20 mass ppm each. As a result, the MnCoZn ferrite has a rattler value of less than 0.85%, a coercivity of no more than 15 A/m at 100°C, a relative resistivity of at least 30 Ω∙m, a Curie temperature of at least 170°C, an initial permeability of at least 3,000 at 100°C and 1 kHz, an initial permeability of at least 2,000 at 100°C and 1 MHz, and an initial permeability of at least 150 at 100°C and 10 MHz.
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
H01F 1/36 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
58.
Thermally curable composition, varnish thereof, and thermally cured object
Provided are: a thermally curable composition which contains benzoxazine-based compounds obtained by condensing aromatic diamines, a phenol compound, and an aldehyde compound, the aromatic diamines being a mixture comprising 4,4′-oxydianiline and 3,4′-oxydianiline, the mass ratio of the 4,4′-oxydianiline to the 3,4′-oxydianiline being 50:50 to 80:20; a varnish of the thermally curable composition; and a thermally cured object.
C08G 14/06 - Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups of aldehydes with phenols and monomers containing hydrogen attached to nitrogen
2322 and 300 to 1300 ppm by mass of CaO, with the balance being unavoidable impurities, wherein the amounts of Cd, Pb, Sb, As and Se in the unavoidable impurities are suppressed to less than 20 ppm by mass each, and furthermore, the Rattler value is brought to less than 0.85%, the coercive force at 23°C to 15 A/m or lower, the specific resistance to 30 Ω•m or higher, and the Curie temperature to 100°C or higher. In this manner, the MnCoZn ferrite not only has excellent magnetic properties of high resistance and low coercive force, but also has excellent mechanical strength.
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
60.
Negative-electrode material for Li-ion secondary cell, method for manufacturing said material, negative electrode for Li-ion-secondary-cell, and Li-ion secondary cell
x (O≤x<2) contain Li and at least one metallic element M selected from among Si, Al, Ti, and Zr, and have a coating of a Li-containing oxide comprising a composition in which M/Li>5 with respect to the molar ratio.
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 4/1391 - Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
H01M 4/48 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/1395 - Processes of manufacture of electrodes based on metals, Si or alloys
H01M 4/38 - Selection of substances as active materials, active masses, active liquids of elements or alloys
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 4/134 - Electrodes based on metals, Si or alloys
H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
2322 and 300 to 1300 mass ppm of CaO; as the remainder, incidental impurities wherein the amounts of P, B, S, and Cl are controlled to respectively less than 50 mass ppm, less than 20 mass ppm, less than 30 mass ppm, and less than 50 mass ppm. Furthermore, for this MnCoZn ferrite, the rattler value is set to less than 0.85%, squareness ratio at 23°C to 0.35 or less, specific resistance to 30 Ω∙m or more, and Curie temperature to 100°C or higher.
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
C04B 35/626 - Preparing or treating the powders individually or as batches
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
The purpose of the present invention is to provide a tar acid production method with which it is possible to more easily reduce the amount of basic substances contained in tar acids. This tar acid production method involves: step A of adding an alkali to carbolic oil and/or naphthalene oil obtained by distilling coal tar, thereby converting tar acids contained in the carbolic oil and/or naphthalene oil into tar acid salts; step B of adding basic-substance-containing tar acids to the tar acid salts obtained in step A, thereby providing a mixture; step C of adding an acid to the mixture obtained in step B, thereby providing crude tar acids; and step D of distilling the crude tar acids obtained in step C, thereby providing tar acids.
Provided is a method for recovering tar acid salts in a higher recovery. The method for recovering tar acid salts comprises: a coal tar distillation step in which coal tar is distilled to separately obtain naphthalene oil and carbolic oil; a first separation step, in which an aqueous alkali solution is added to the naphthalene oil obtained in the coal tar distillation step, thereby converting tar acids contained in the naphthalene oil into tar acid salts, and the naphthalene oil is separated into oil layer 1, from which the tar acids have been removed, and aqueous layer 1, which contains the tar acid salts; a naphthalene distillation step in which the oil layer 1 separated in the first separation step is distilled to obtain naphthalene light oil; and a second separation step, in which the carbolic oil obtained in the coal tar distillation step is mixed with the aqueous layer 1 separated in the first separation step and with the naphthalene light oil obtained in the naphthalene distillation step, thereby converting tar acids contained in both the carbolic oil and the naphthalene light oil into tar acid salts, and the mixture is separated into oil layer 2, from which the tar acids have been removed, and aqueous layer 2, which contains the tar acid salts.
A rod-shaped MnZn ferrite core containing, as basic components, iron: 51.5-54.5 mol% in terms of Fe2O3, zinc: 10.0-17.0 mol% in terms of ZnO, and manganese: remainder and as secondary components SiO2: 50-300 mass ppm, CaO: 100-1300 mass ppm, and Nb2O5: 100-400 mass ppm, wherein both high magnetic permeability with an initial magnetic permeability μi at 23°C, 100 kHz of 1800 or higher and high strength with an incidence of core having strength of less than 100 MPa of 4% or less when the three-point bending strength is measured at n = 50 are realized by making the sintered density of the MnZn ferrite core be 4.85 g/cm3 or higher and making the average value of the maximum trough depth of the contour curve at n = 50 to be 17 μm or less in a surface quality observation based on JIS B 0601.
C04B 35/38 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on ferrites with manganese oxide as the principal oxide with zinc oxide
H01F 1/34 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
H01F 1/36 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
H01F 3/08 - Cores, yokes or armatures made from powder
65.
POLYIMIDE PRECURSOR COMPOSITION, METHOD FOR PRODUCING POLYIMIDE RESIN, AND POLYIMIDE RESIN
Provided are: a polyimide precursor composition comprising a hemiacetal ester compound represented by formula (1), a polyamino compound having at least two primary amino groups per molecule, and an aqueous medium, the polyamino compound containing a hydrazide compound; a method for producing a polyimide resin; and a polyimide resin.
A method for producing a dicyclopentadiene-modified phenolic resin. The method including reusing a fluorine-based ion-exchange resin as a catalyst in a reaction between a phenol and a dicyclopentadiene, the fluorine-based ion-exchange resin having been used as a catalyst when a phenol and a dicyclopentadiene are allowed to react with each other to produce a first dicyclopentadiene-modified phenolic resin. In the method, the fluorine-based ion-exchange resin is washed with an organic solvent. The dicyclopentadiene-modified phenolic resin obtained by the method has a stable quality, has a high purity, and is inexpensive.
C08G 61/08 - Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms prepared by ring-opening of carbocyclic compounds of carbocyclic compounds containing one or more carbon-to-carbon double bonds in the ring
Provided are: a method for producing fluorenylidene diallylphenols represented by formula (1), the method including a reaction step for reacting fluorenones represented by formula (2) and allylphenols represented by formula (3) in the presence of an acid catalyst, excluding compounds having mercapto groups, the amount of acid catalyst being 0.001-20 mol per mol of compound represented by formula (2); and fluorenylidene diallylphenols represented by formula (4).
C07C 37/20 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions increasing the number of carbon atoms using aldehydes or ketones
C07C 39/23 - Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic, containing six-membered aromatic rings and other rings, with unsaturation outside the aromatic rings
C07C 39/42 - Halogenated derivatives containing six-membered aromatic rings and other rings
C07C 41/30 - Preparation of ethers by reactions not forming ether-oxygen bonds by increasing the number of carbon atoms, e.g. by oligomerisation
C07C 43/23 - Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring containing hydroxy or O-metal groups
C07C 51/377 - Preparation of carboxylic acids or their salts, halides, or anhydrides by reactions not involving formation of carboxyl groups by splitting-off hydrogen or functional groupsPreparation of carboxylic acids or their salts, halides, or anhydrides by reactions not involving formation of carboxyl groups by hydrogenolysis of functional groups
C07C 65/28 - Compounds having carboxyl groups bound to carbon atoms of six-membered aromatic rings and containing any of the groups OH, O-metal, —CHO, keto, ether, groups, groups, or groups containing ether groups, groups, groups, or groups having unsaturation outside the aromatic rings
A polyamide acid composition and a polyimide composition are obtained from a tetracarboxylic acid compound containing an aromatic tetracarboxylic acid compound having a naphthalene skeleton and a diamine compound containing an aromatic diamine compound having a biphenyl skeleton.
Provided are: a thermally curable composition which contains benzoxazine-based compounds obtained by condensing aromatic diamines, a phenol compound, and an aldehyde compound, the aromatic diamines being a mixture comprising 4,4'-oxydianiline and 3,4'-oxydianiline, the mass ratio of the 4,4'-oxydianiline to the 3,4'-oxydianiline being 50:50 to 80:20; a varnish of the thermally curable composition; and a thermally cured object.
The present invention provides a negative electrode material for Li ion secondary batteries, which is capable of sufficiently suppressing reductive decomposition of the electrolyte solution by an active material during the charging, while being capable of suppressing expansion of Si particles during the charging, and which enables the achievement of high discharge capacity that is higher than the theoretical capacity of graphite and excellent cycle characteristics. A negative electrode material for Li ion secondary batteries according to the present invention is configured such that aggregated particles have an average particle diameter of 0.5-10 μm, each of said aggregated particles being obtained by forming, on the surfaces of Si particles, a coating film of an Li-containing oxide that is formed from a composition containing Li and at least one metal element M selected from among Si, Al, Ti and Zr, and by having a conductive binder material adhere to the surface of the coating film.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
71.
NEGATIVE-ELECTRODE MATERIAL FOR LI-ION SECONDARY CELL, METHOD FOR MANUFACTURING SAID MATERIAL, LI-ION-SECONDARY-CELL NEGATIVE ELECTRODE, AND LI-ION SECONDARY CELL
The present invention provides a Li-ion secondary cell negative-electrode material with which it is possible to adequately suppress reductive decomposition of a liquid electrolyte by an active material during charging, the Li-ion secondary cell negative-electrode material exhibiting a high discharge capacity that exceeds the theoretical capacity of graphite and exceptional initial charging efficiency and cycle characteristics. In this negative-electrode material for a Li-ion secondary cell, the surfaces of particles of SiOx (0≤xឬ2) contain Li and at least one metallic element M selected from among Si, Al, Ti, and Zr, and have a coating of a Li-containing oxide comprising a composition in which M/Liᡶ5 with respect to the molar ratio.
There is provided a polyimide composition that is useful for electronic substrate materials, retains high heat resistance and mechanical strength intrinsic to polyimides, and has a lower dielectric constant and dielectric loss tangent. A polyimide composition for use in electronic substrate materials, containing a polyimide produced by polymerization between a diamine component containing 5-(4-aminophenoxy)-3-[4-(4-aminophenoxy)phenyl]-1,1,3-trimethylindan and an acid component containing 3,3′,4,4′-biphenyltetracarboxylic acid dianhydride.
C08G 73/00 - Macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen or carbon, not provided for in groups
C08G 73/10 - PolyimidesPolyester-imidesPolyamide-imidesPolyamide acids or similar polyimide precursors
B32B 15/08 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
B32B 15/20 - Layered products essentially comprising metal comprising aluminium or copper
B32B 27/28 - Layered products essentially comprising synthetic resin comprising copolymers of synthetic resins not wholly covered by any one of the following subgroups
C08L 79/08 - PolyimidesPolyester-imidesPolyamide-imidesPolyamide acids or similar polyimide precursors
C09J 7/30 - Adhesives in the form of films or foils characterised by the adhesive composition
C09J 7/25 - PlasticsMetallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
73.
DICYCLOPENTADIENE COMPOUND-MODIFIED PHENOLIC RESIN PRODUCTION METHOD
The purpose of the present invention is to provide a dicyclopentadiene compound-modified phenolic resin production method, whereby, when a catalyst is used repeatedly in the method, it becomes possible to stabilize the properties and color of the resin and it also becomes possible to use the catalyst repeatedly a sufficient number of times. The present invention addresses the problem of providing: a dicyclopentadiene compound-modified phenolic resin production method for producing a dicyclopentadiene compound-modified phenolic resin by reacting a phenol compound with a dicyclopentadiene compound, wherein a fluorinated ion exchange resin, which is used as a catalyst in the production, is re-used as a catalyst for the reaction between the phenol compound and the dicyclopentadiene compound to produce the dicyclopentadiene compound-modified phenolic resin, said method being characterized in that the fluorinated ion exchange resin to be re-used is washed with an organic solvent and the washed fluorinated ion exchange resin is used at least once during the re-use of the fluorinated ion exchange resin; and a production method as mentioned above, which is employed for purifying the product and whereby it becomes possible to prevent the discoloration of the resin produced in the above-mentioned dicyclopentadiene compound-modified phenolic resin production. The dicyclopentadiene compound-modified phenolic resin produced by the production method according to the present invention has stable quality and high purity and is inexpensive.
C08G 61/02 - Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes
74.
CARBONACEOUS COATED GRAPHITE PARTICLES FOR NEGATIVE-ELECTRODE MATERIAL OF LITHIUM-ION SECONDARY CELL, NEGATIVE ELECTRODE FOR LITHIUM-ION SECONDARY CELL, AND LITHIUM-ION SECONDARY CELL
Provided is a negative-electrode material with which it is possible to obtain exceptional cell properties when said material is used as the negative-electrode material of a lithium-ion secondary cell. Carbonaceous coated graphite particles for the negative-electrode material of a lithium-ion secondary cell in which a carbonaceous material is provided on at least part of the surfaces of graphite particles that are obtained by anisotropically applying pressure to spheroidal and/or ellipsoidal graphite, wherein the carbonaceous coated graphite particles satisfy conditions (1) through (3) below. (1) The carbonaceous material content is 0.1-3.0 parts by mass per 100 parts by mass of the anisotropically pressurized graphite particles in the carbonaceous coated graphite particles. (2) The pore volume of pores measuring 1.1 µm or less in diameter is 0.100 mL/g or less as measured by a mercury porosimeter, and the ratio of the pore volume of pores measuring 0.54 µm or less in diameter with respect to said pore volume is 80% or greater. (3) The dibutyl phthalate (DBP) oil absorption is 40.0 mL/100 g or less.
Provided is a polyimide composition with which it is possible to achieve a low thermal expansion coefficient and high heat resistance, the polyimide composition having exceptional solubility of polyamide acid varnish. Provided are: a polyamide acid composition comprising a tetracarboxylic acid compound that includes an aromatic tetracarboxylic acid compound having a naphthalene skeleton, and a diamine compound that includes an aromatic diamine compound having a biphenyl skeleton; and a polyimide composition.
A phenolic resin composition and an epoxy resin composition from which a cured epoxy resin having excellent heat resisting properties and a low dielectric constant can be produced. The phenolic resin composition contains a modified phenolic resin and a tetrakisphenolethane compound, the modified phenolic resin being prepared by condensation of a cyclic hydrocarbon compound having two or more unsaturated bonds and a compound having a phenolic hydroxyl group, in which the content of the tetrakisphenolethane compound is 3% to 60% by mass with respect to the total content of the modified phenolic resin and the tetrakisphenolethane compound. The epoxy resin composition is prepared by epoxidizing the phenolic resin composition. The cured epoxy resin is prepared by allowing the epoxy resin composition to react with a hardener.
C08L 63/00 - Compositions of epoxy resinsCompositions of derivatives of epoxy resins
C08G 59/06 - Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols
C08G 8/04 - Condensation polymers of aldehydes or ketones with phenols only of aldehydes
C08L 61/06 - Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
C08G 65/48 - Polymers modified by chemical after-treatment
GRAPHITE PARTICLES FOR LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE MATERIALS, LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE AND LITHIUM ION SECONDARY BATTERY
Provided are: a negative electrode material which has at least one of excellent initial charge/discharge efficiency, excellent high-rate charge characteristics, excellent high-rate discharge characteristics and excellent long-term cycle characteristics; a negative electrode which uses this negative electrode material; and a lithium secondary battery. Graphite particles for lithium ion secondary battery negative electrode materials, which are a mixture of composite graphite particles (C1) that comprise carbonaceous material (B1) within spheroidized graphite particles (A) having spherical or generally spherical shapes and/or on at least a part of the surfaces of the spheroidized graphite particles (A) and composite graphite particles (C2) that have a graphite material (B2) within the spheroidized graphite particles (A) having spherical or generally spherical shapes and/or on at least a part of the surfaces of the spheroidized graphite particles (A). In this connection, the mixture satisfies the following requirements (1)-(5). (1) The interplanar spacing (d002) of a carbon network surface layer is 0.3360 nm or less. (2) The tap density is 1.0 g/cm3 or more. (3) The average particle diameter is 5-25 μm. (4) The average aspect ratio is 1.2 or more but less than 4.0. (5) The pore volume of pores having a diameter of 0.5 μm or less as determined by means of a mercury porosimeter is 0.08 ml/g or less.
The object of the present invention is to provide a binder pitch increased in carbonization yield (fixed carbon content) without varying the softening point thereof. A binder pitch has a carbon-to-hydrogen molar ratio of 1.90 or more, a quinoline insoluble content of 12.0% to 30.0% by mass, a free carbon content of 12.0% to 30.0% by mass, a mesophase content of 0.50% by mass or less, a toluene insoluble content of 24.0% by mass or more, and a fixed carbon content of 58.0% by mass or more.
H01B 1/24 - Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon, or silicon
79.
NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, PROCESS FOR PRODUCING SAME, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY
The present invention is a negative electrode material for lithium ion secondary batteries which comprises granules including flake graphite, the inside of each granule having a porous structure configured of the flake graphite that has stacked in a non-parallel manner and that has been composited with a metal capable of being alloyed with lithium, wherein graphite and/or carbon having an average particle diameter not larger than 1/2 that of the flake graphite is adherent to the surface of the granules and is present in the inside thereof, and the surface and inside of each granule has been coated with pyrolytic carbon. The negative electrode material for lithium ion secondary batteries is characterized by comprising 50 parts by mass or more but less than 95 parts by mass of the flake graphite, 1-30 parts by mass of the metal, more than 5 parts by mass but not larger than 50 parts by mass of the graphite and carbon having an average particle diameter not larger than 1/2 that of the flake graphite, and 0.25-20 parts by mass of the pyrolytic carbon, relative to 100 parts by mass of the sum of the flake graphite and the graphite and carbon having an average particle diameter not larger than 1/2 that of the flake graphite.
Provided is a polyimide composition having a reduced dielectric constant and dielectric loss tangent while maintaining the high heat resistance and mechanical strength inherent in polyimide, the polyimide composition being useful as an electronic substrate material. A polyimide composition for an electronic substrate material, the polyimide composition containing polyimide obtained by polymerizing a diamine component that contains 5-(4-aminophenoxy)-3-[4-(4-aminophenoxy)phenyl]-1,1,3-trimethylindane and an acid component that contains 3,3',4,4'-biphenyltetracarboxylic dianhydride.
Method for producing amorphous carbon particle, amorphous carbon particles, negative electrode material for lithium ion secondary batteries, and lithium ion secondary battery
A method for producing an amorphous carbon particle includes the steps of: obtaining a first crosslinked product by admixing mesophase particles with an amorphous carbon precursor and thereafter subjecting the mixture to a crosslinking treatment, or obtaining a second crosslinked product by crosslinking the amorphous carbon precursor and thereafter admixing the mesophase particles with the crosslinked precursor; and subjecting the first or second crosslinked product to an infusibilization treatment and thereafter firing the product to produce amorphous carbon particles including the mesophase particles within the particles.
H01B 1/04 - Conductors or conductive bodies characterised by the conductive materialsSelection of materials as conductors mainly consisting of carbon-silicon compounds, carbon, or silicon
Provided are a phenolic resin composition and an epoxy resin composition that make it possible to obtain a cured epoxy resin having exceptional heat resistance and a low dielectric constant, and this cured epoxy resin. A phenolic resin composition containing a modified phenolic resin, the modified phenolic resin being obtained by condensing a cyclic hydrocarbon compound having two or more unsaturated bonds and a compound having a phenolic hydroxyl group, and a tetrakisphenol ethane compound, in which phenolic resin composition the contained amount of the tetrakisphenol ethane compound is 3-60 mass% relative to the total contained amount of the modified phenolic resin and the tetrakisphenol ethane compound; an epoxy resin composition obtained by epoxidizing the phenolic resin composition; and a cured epoxy resin obtained by reacting the epoxy resin composition and a curing agent.
C08L 65/00 - Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chainCompositions of derivatives of such polymers
C08G 59/32 - Epoxy compounds containing three or more epoxy groups
[Problem] To provide an aqueous composition of a polyimide precursor and a method for producing a polyimide resin (cured product) which have excellent coating properties and storage stability, and the cured product of which has good solvent resistance and water resistance. [Solution] A polyimide precursor composition comprising a benzofuran derivative represented by formula (1), a polyamine represented by formula (C), and an aqueous medium, and a method for producing a polyimide resin by curing the polyimide precursor composition through heat treatment.
C08G 73/10 - PolyimidesPolyester-imidesPolyamide-imidesPolyamide acids or similar polyimide precursors
C09D 179/08 - PolyimidesPolyester-imidesPolyamide-imidesPolyamide acids or similar polyimide precursors
84.
Method for producing non-graphitizable carbon material, non-graphitizable carbon material, negative electrode material for lithium-ion secondary battery, and lithium-ion secondary battery
Provided is a method for producing a non-graphitizable carbon material, the method including a step in which a raw material of the non-graphitizable carbon material is subjected to a cross-linking treatment to obtain a cross-linked product; a step in which the cross-linked product is subjected to an infusibility-imparting treatment to obtain an infusibility-imparted product; a step in which the infusibility-imparted product is subjected to a pulverizing treatment; and a step in which the infusibility-imparted product that has been subjected to the pulverizing treatment is fired at 900° C. to 1300° C. to obtain the non-graphitizable carbon material.
Lithium iron phosphate can be produced by a production method comprising: an aqueous solution provision step of providing an aqueous solution containing phosphoric acid and a hydroxycarboxylic acid; a first production step of adding iron particles containing 0.1 to 2 mass% of oxygen to the aqueous solution and then reacting the phosphoric acid and the hydroxycarboxylic acid in the aqueous solution with the iron particles under an oxidative atmosphere to produce a first reaction solution; a second production step of adding a lithium source to the first reaction solution to produce a second reaction solution; a third production step of adding a carbon source to the second reaction solution to produce a third reaction solution; a precursor production step of drying the third reaction solution to produce a lithium iron phosphate precursor; and a burning step of burning the lithium iron phosphate precursor under a non-oxidative atmosphere to produce lithium iron phosphate.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
86.
Method for producing non-graphitizable carbon material, negative electrode material for lithium ion secondary battery, and lithium ion secondary battery
A method for producing a non-graphitizable carbon material includes providing a raw material of a non-graphitizable carbon material. The raw material is cross-linked to obtain a cross-linked product. The cross-linked product is infusibilized to obtain an infusibilized product. The infusibilized product is baked to obtain the non-graphitizable carbon material. A mechanochemical treatment is performed on the cross-linked product or the infusibilized product.
H01M 4/587 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
H01M 4/133 - Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
87.
NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, METHOD FOR PRODUCING SAME, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES USING SAME, AND LITHIUM ION SECONDARY BATTERY
A negative electrode material for lithium ion secondary batteries, which is characterized by being composed of spherical composite bodies that are formed of flake graphite particles, baked carbon and metal particles that can be alloyed with lithium. This negative electrode material for lithium ion secondary batteries is also characterized in that: the composite bodies have pores inside; the flake graphite particles are not parallel to each other inside the composite bodies, but are concentrically oriented in the surfaces of the composite bodies; and the metal particles are dispersed in/on the composite particles.
Provided is a resin composition which exhibits excellent UV absorption characteristics and which is useful in applications in which quality is controlled by AOI. Also provided is a cured product of the resin composition. The resin composition contains (A) a substituted phenolglyoxal resin obtained by reacting a cresol and/or a xylenol and a glyoxal in the presence of an acid catalyst, (B) a biphenyltetracarboxylic acid and (C) an epoxy resin.
C08G 8/04 - Condensation polymers of aldehydes or ketones with phenols only of aldehydes
C08G 59/42 - Polycarboxylic acidsAnhydrides, halides, or low-molecular-weight esters thereof
89.
METHOD FOR PRODUCING AMORPHOUS CARBON PARTICLES, AMORPHOUS CARBON PARTICLES, NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY
A method for producing amorphous carbon particles, which comprises: a step wherein a first crosslinked product is obtained by adding and mixing mesophase particles into a precursor of amorphous carbon and then carrying out a crosslinking treatment, or a step wherein a second crosslinked product is obtained by subjecting the precursor of amorphous carbon to a crosslinking treatment and then adding and mixing the mesophase particles thereinto; and a step wherein amorphous carbon particles, which internally contain the mesophase particles, are obtained by firing the first or second crosslinked product after subjecting the first or second crosslinked product to an infusibilization treatment.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
90.
COMPOSITE GRAPHITE MATERIAL, METHOD FOR PRODUCING SAME, NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY
A composite graphite material which is configured of an adhesive (A) that is formed of a carbon material and/or a graphite material having low crystallinity, a flake graphite material (B) and a spheroidized or generally spheroidized graphite material (C), and which is characterized in that: at least a part of the flake graphite material (B) is adhered to the graphite material (C) in the form of projections, with the adhesive (A) being therebetween; the content of the adhesive (A) is 0.1-20% by mass; the content of the flake graphite material (B) is 0.05% by mass or more but less than 30% by mass; the content of the graphite material (C) is 99.8-50% by mass; and the composite graphite material has no fractured surface. A method for producing the composite graphite material; a negative electrode material for lithium ion secondary batteries, which uses the composite graphite material; and a lithium ion secondary battery.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
91.
NAGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, NAGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY
A negative electrode material for lithium ion secondary batteries, which contains (A) a spheroidized or ellipsoidized natural graphite having an average particle diameter of 5-35 μm and an average aspect ratio of less than 2.0, (B) a bulk mesophase graphitized material having an average particle diameter of 2-25 μm and an average aspect ratio of less than 2.0 and (C) a flake graphite having an average particle diameter of 1-15 μm, said average particle diameter being smaller than the average particle diameter of the bulk mesophase graphitized material (B), and an average aspect ratio of 5.0 or more, at a specific mass ratio; a negative electrode for lithium ion secondary batteries, which uses this negative electrode material for lithium ion secondary batteries; and a lithium ion secondary battery.
2—. The heat-curable composition containing the benzoxazine compound has excellent solubility in solvents, heat resistance and flame retardancy, and therefore can be used for providing a cured product of the composition or a varnish.
C09D 179/04 - Polycondensates having nitrogen-containing heterocyclic rings in the main chainPolyhydrazidesPolyamide acids or similar polyimide precursors
C08G 73/06 - Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromoleculePolyhydrazidesPolyamide acids or similar polyimide precursors
93.
TRISPHENOL METHANES, METHOD FOR PRODUCING SAME AND USE THEREOF
Provided are low color trisphenol methanes, method for producing the same and use thereof. When reacting phenols with aromatic hydroxy aldehydes under acid catalysis and heat, the reaction is performed at a temperature of 100°C or less from the start of the reaction until the reaction rate reaches 90%, after which the temperature is raised and the reaction is performed at over 100°C and 130°C or less in order to produce the trisphenol methanes. Thus, trisphenol methanes with a Gardner color scale of 9 or less (as a 0.5 mass% THF solution), and a low color epoxy resin can be obtained.
C07C 29/32 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring increasing the number of carbon atoms by reactions without formation of hydroxy groups
C08G 59/06 - Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols
METHOD FOR PRODUCING HARDLY-GRAPHITIZABLE CARBON MATERIAL, HARDLY-GRAPHITIZABLE CARBON MATERIAL, NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY
This method for producing a hardly-graphitizable carbon material, wherein particle diameters can be easily controlled, comprises: a step of obtaining a crosslinked product by subjecting a starting material for hardly-graphitizable carbon materials to a crosslinking process; a step of obtaining an infusibilized product by subjecting the crosslinked product to an infusibilization process; a step of subjecting the infusibilized product to a pulverization process; and a step of obtaining a hardly-graphitizable carbon material by firing the pulverized infusibilized product at 900-1,300˚C.
H01M 4/587 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
95.
METHOD FOR PRODUCING AMORPHOUS CARBON PARTICLES, AMORPHOUS CARBON PARTICLES, NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY
A method for producing amorphous carbon particles, which comprises: a step wherein graphite particles are added to and mixed with a precursor of amorphous carbon and then the resulting is subjected to a crosslinking treatment, thereby obtaining a first crosslinked product, or alternatively the precursor of amorphous carbon is subjected to a crosslinking treatment and then the graphite particles are added to and mixed with the resulting, thereby obtaining a second crosslinked product; and a step wherein amorphous carbon particles, each of which internally contains graphite particles, are obtained by subjecting the first or second crosslinked product to an infusibilization treatment and then firing the infusibilized product.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/587 - Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
96.
METHOD FOR PRODUCING HARDLY GRAPHITIZABLE CARBON MATERIAL, NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY
A method for producing a hardly graphitizable carbon material, which is characterized by comprising: a step wherein a starting material for a hardly graphitizable carbon material is subjected to a crosslinking treatment, thereby obtaining a crosslinked product; a step wherein the crosslinked product is subjected to an infusibilization treatment, thereby obtaining an infusibilized product; and a step wherein the infusibilized product is fired, thereby obtaining a hardly graphitizable carbon material. The method for producing a hardly graphitizable carbon material is also characterized in that the crosslinked product or the infusibilized product is subjected to a mechanochemical treatment.
The method for manufacturing lithium iron phosphate, including an aqueous solution preparation step to prepare an aqueous solution containing phosphoric acid and hydroxycarboxylic acid, a first production step to produce a first reaction solution by adding iron particles containing 0.1 to 2 mass% of oxygen to the aqueous solution and reacting the phosphoric acid, hydroxycarboxylic acid, and iron particles in the aqueous solution in an oxidizing atmosphere, a second production step to produce a second reaction solution by adding a lithium source to the first reaction solution, a third production step to produce a third reaction solution by adding a carbon source to the second reaction solution, a precursor production step to produce an lithium iron phosphate precursor by drying the third reaction solution, and a firing step to obtain lithium iron phosphate by firing the lithium iron phosphate precursor in a non-oxidizing atmosphere.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
98.
ANODE MATERIAL FOR LITHIUM ION RECHARGEABLE BATTERY, ANODE FOR LITHIUM ION RECHARGEABLE BATTERY, AND LITHIUM ION RECHARGEABLE BATTERY
The anode material for a lithium ion rechargeable battery contains a mesophasic microsphere graphite (A) having an average particle diameter of 10-40 μm and an average aspect ratio of less than 1.3 and other graphites (B) to (D) having average particles diameters that are less than that of (A) in a weight ratio specified in Formulas (1) to (3) below. (B): spheriodized or ellipsoidized natural graphite having an average particle diameter of 5-35 μm and an average aspect ratio of less than 2.0, (C): a squamous graphite having an average particle diameter of 1-15 μm and an average aspect ratio of 5.0 or greater, (D): a graphite other than those of (A) to (C) above having an average grain diameter of 2-25 μm and an average aspect ratio of less than 2.0. (a):(b) = (10-70):(90-30) (1), (a+b): (d) = (70-98):(30-2) (2), (a+b+d): (c) = (85 or greater and less than 100):(15 or less and greater than 0) (3). (a) to (d) are the mass for each component (A) to (D), respectively. The density of the anode mixture layer of the anode material can be increased at low pressure, and a lithium ion rechargeable battery having an anode that uses the anode material can therefore have high discharge capacity, and excellent fast charge properties, fast discharge properties, and cycling characteristics.
A heat-curable composition comprises 30-70 mass% of a compound represented by formula (1) and 70-30 mass% of a compound represented by formula (2). In formulae (1) and (2), R1, R2, R3 and R4 are the same as or different from one another, and are independently selected from the group consisting of -H, -CH3, -C(CH3)3 and a group represented by formula (i) for each of compound molecules. In formula (i), Y is selected from the group consisting of -O-, -CH2- and -C(CH3)2-. The heat-curable composition containing the benzoxazine compound has excellent solubility in solvents, heat resistance and flame retardancy, and therefore can be used for providing a cured product of the composition or a varnish.
Disclosed are a polyimide and a polyimide film, each of which is obtained by causing a component (I) that is an aromatic diamine represented by formula (1) to react with a component (II) that is composed of 3,3',4,4'-biphenyltetracarboxylic acid dianhydride, pyromellitic acid dianhydride, p-phenylene diamine and 4,4'-diaminodiphenyl ether, and each of which contains the component (I) in an amount of 0.1-10.0% by mole and the component (II) in an amount of 99.9-90.0% by mole, respectively relative to the total of the component (I) and the component (II). (In formula (1), R1, R2, R3 and R4 each independently represents a group that is selected from the group consisting of a hydrogen atom, a halogen atom, a nitrogen atom-containing group, a linear or branched alkyl group having 1-12 carbon atoms, a linear or branched alkenyl group having 2-12 carbon atoms, a linear or branched alkoxy group having 1-12 carbon atoms, a hydroxy group, a nitrile group, a nitro group, a carboxy group, a carbamoyl group, and an aromatic group having 6-12 carbon atoms.) The thus-obtained polyimide film has a linear thermal expansion coefficient similar to that of copper and exhibits high elastic modulus and excellent water vapor permeability without deteriorating heat resistance.
patents
