Abstract

Improved dental appliances and polymeric sheets are disclosed. The dental appliances and polymeric sheets are useful for making dental appliances having outer layers comprised of a material having a modulus of from about 1,000 MPA to 2,500 MPA ("hard") and an inner core comprised of elastomeric material or materials having a modulus of from about 50 MPa to 500 MPa ("soft"), which exhibit improved flexibility and strength and better stain resistance than currently available materials and dental appliances.

IPC Classes  ?

• A61C 7/00 - Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
• A61C 7/08 - Mouthpiece-type retainers
• B32B 27/00 - Layered products essentially comprising synthetic resin
• B32B 27/06 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance

Abstract

Improved dental appliances and polymeric sheet compositions are disclosed. The polymeric sheet compositions are useful for making dental appliances having outer layers comprised of a material having a modulus of from about 1,000 MPA to 3,000 MPA ("hard") and an inner core comprised of elastomeric material or materials having a modulus of from about 25 MPa to 500 MPa ("soft") and a thickness of greater than about 250 microns, which exhibit improved flexibility and strength, and better stain and tear resistance than currently available materials and dental appliances.

IPC Classes  ?

• A61C 7/08 - Mouthpiece-type retainers
• A61L 27/14 - Macromolecular materials

Abstract

Improved thermoplastic polyurethane compositions are provided that exhibit a combination of moderate elastic modulus, high elongation to yield, high elongation to break, high optical clarity, good stain resistance, good elastic recovery, and excellent force retention in the presence of water at moderate temperatures.

IPC Classes  ?

• C08G 18/18 - Catalysts containing secondary or tertiary amines or salts thereof
• C08G 18/22 - Catalysts containing metal compounds
• C08G 18/24 - Catalysts containing metal compounds of tin
• C08G 18/32 - Polyhydroxy compoundsPolyaminesHydroxy amines
• C08G 18/72 - Polyisocyanates or polyisothiocyanates

Abstract

Improved dental appliances and polymeric sheet compositions are disclosed. The polymeric sheet compositions are useful for making dental appliances having outer layers comprised of a material having a modulus of from about 1,000 MPA to 2,500 MPA ("hard") and an inner core comprised of elastomeric material or materials having a modulus of from about 50 MPa to 500 MPa ("soft"), which exhibit improved flexibility and strength, and better stain and tear resistance than currently available materials and dental appliances.

IPC Classes  ?

• A61C 7/08 - Mouthpiece-type retainers
• B32B 7/022 - Mechanical properties
• B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind

Abstract

Improved dental appliances and polymeric sheets are disclosed. The dental appliances and polymeric sheets are useful for making dental appliances having outer layers comprised of a material having a modulus of from about 1,000 MP A to 2,500 MP A ("hard") and an inner core comprised of elastomeric material or materials having a modulus of from about 50 MPa to 500 MPa ("soft"), which exhibit improved flexibility and strength and better stain resistance than currently available materials and dental appliances.

IPC Classes  ?

• A61C 7/08 - Mouthpiece-type retainers
• A61F 5/56 - Devices for preventing snoring
• A63B 71/08 - Body-protectors for players or sportsmen
• B32B 7/02 - Physical, chemical or physicochemical properties
• B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
• B32B 27/28 - Layered products essentially comprising synthetic resin comprising copolymers of synthetic resins not wholly covered by any one of the following subgroups
• B32B 27/30 - Layered products essentially comprising synthetic resin comprising vinyl resinLayered products essentially comprising synthetic resin comprising acrylic resin
• B32B 27/32 - Layered products essentially comprising synthetic resin comprising polyolefins
• B32B 27/34 - Layered products essentially comprising synthetic resin comprising polyamides
• B32B 27/36 - Layered products essentially comprising synthetic resin comprising polyesters
• B32B 27/40 - Layered products essentially comprising synthetic resin comprising polyurethanes

Abstract

The subject matter described herein relates to thermoresponsive switching materials that undergo a thermal transition over a narrow temperature range and to devices, such as actuators, indicators, and sensors, prepared from such compositions.

IPC Classes  ?

• A62C 37/36 - Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
• C09K 3/00 - Materials not provided for elsewhere
• F03G 7/06 - Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying, or the like
• F16K 17/38 - Safety valvesEqualising valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
• F16K 17/40 - Safety valvesEqualising valves with fracturing member, e.g. fracturing diaphragm, fusible joint
• G01K 11/06 - Measuring temperature based on physical or chemical changes not covered by group , , , or using melting, freezing, or softening
• G12B 1/00 - Sensitive elements capable of producing movement or displacement for purposes not limited to measurementAssociated transmission mechanisms therefor

Abstract

Devices are described that include a component comprised of a material having
a structure of R1 - C(O) - NX - R2, wherein each of R1 and R2 is independently
a saturated alkyl having between 7-22 carbon atoms or an aryl, X is H or C(O)-
Y, Y together with R1 forms a ring. The material is characterized by a single,
sharp melting point, thus making it suitable for use, for example, in
thermo~mechanical actuating devices or in temperature-indicating devices. Also
described are compositions comprising two or more materials each having a
structure of Rn 1 - C(O) - NH - R2 wherein, nis an identifying integer
corresponding to a material in the composition; wherein for each material n in
the composition, Rn 1 and Rn 2 are a saturated alkyl having between 7-22
carbon atoms, wherein for each material n Rn 1 and Rn 2 differ by one carbon
atom, and wherein the number of carbon atoms in Rn 2 of each material ndiffers
by four or less.

IPC Classes  ?

• C07C 233/05 - Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having nitrogen atoms of carboxamide groups bound to hydrogen atoms or to carbon atoms of unsubstituted hydrocarbon radicals with carbon atoms of carboxamide groups bound to carbon atoms of an acyclic saturated carbon skeleton having the nitrogen atoms of the carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
• C07C 233/07 - Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having nitrogen atoms of carboxamide groups bound to hydrogen atoms or to carbon atoms of unsubstituted hydrocarbon radicals with carbon atoms of carboxamide groups bound to carbon atoms of an acyclic saturated carbon skeleton having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a six-membered aromatic ring
• C07C 233/65 - Carboxylic acid amides having carbon atoms of carboxamide groups bound to carbon atoms of six-membered aromatic rings having the nitrogen atoms of the carboxamide groups bound to hydrogen atoms or to carbon atoms of unsubstituted hydrocarbon radicals
• G12B 1/00 - Sensitive elements capable of producing movement or displacement for purposes not limited to measurementAssociated transmission mechanisms therefor