Abrégé

A process for preparing a thermoplastic vulcanizate, the process comprising: charging a reactor with an olefmic copolymer rubber, where the olefmic copolymer rubber is characterized by a multimodal molecular weight, an average branching index of greater than 0.8, includes less than 10 parts by weight oil per 100 parts by weight rubber, includes less than 1 parts by weight non-rubber particulate, per 100 parts by weight rubber, and is in the form of granules having a particle size less than 8 mm; charging the reactor, contemporaneously or sequentially with respect to the rubber, with a thermoplastic resin, an oil, and a cure system; melt mixing the rubber, the thermoplastic resin, the oil, and the cure system; and dynamically vulcanizing the rubber.

Classes IPC  ?

• C08L 23/10 - Homopolymères ou copolymères du propylène
• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène

Abrégé

A thermoplastic vulcanizate comprising of a dynamically-cured rubber; and a thermoplastic phase, where the thermoplastic phase includes fiber and the reaction product of a methylene donor and a methylene acceptor. The thermoplastic phase could include a functionalized thermoplastic resin.

Classes IPC  ?

• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène
• C08L 23/10 - Homopolymères ou copolymères du propylène
• C08L 23/04 - Homopolymères ou copolymères de l'éthylène
• C08J 5/04 - Renforcement des composés macromoléculaires avec des matériaux fibreux en vrac ou en nappes

Abrégé

Disclosed in one aspect is a pipe comprising a composition of one or more propylene-α-olefm copolymers comprising propylene-derived units and from 5 to 35 wt%, by weight of the propylene-α-olefin copolymer, of ethylene-derived units and/or a C4 to C10 α-olefin-derived unit, and having (i) a density from 0.850 to 0.920 g/cm3; (ii) an Hf of less than 75 J/g; and (iii) a Tm of less than 105°C; and at least one additional component selected from the group consisting of propylene random copolymers having a comonomer content of less than 5 wt%, a propylene block copolymer, propylene homopolymer and combinations thereof; wherein the pipe composition possesses a Flexural Modulus (23°C) less than 650 MPa, an Izod Impact (23°C) greater than 30 kJ/m2, and a Vicat Softening Temperature greater than 110°C.°

Classes IPC  ?

• C08L 23/10 - Homopolymères ou copolymères du propylène

Abrégé

An aspect of the description is directed to hydrolysable silane graft propylene-α-olefm copolymers useful for moisture curable sealants, the copolymers comprising a propylene-α- olefin copolymer component comprising propylene-derived units and from 5 to 35 wt%, by weight of the propylene-α-olefm copolymer, of ethylene-derived units or a C4 to C10 α-olefm- derived unit, and having, in one embodiment, the following features: a density of from 0.850 to 0.920 g/cm3; a MWD of from 1.5 to 20; an Hf of less than or equal to 75 J/g; a Tm of from 25 to 105°C; and a triad tacticity by 13C NMR of 75% or greater; and a hydrolysable silane component. The graft copolymer can be combined with oil and/or a thermoplastic to form a graft copolymer composition capable of being cross-linked by exposure to moisture.

Classes IPC  ?

• C08F 255/04 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères d'hydrocarbures tels que définis dans le groupe sur des polymères d'oléfines contenant deux ou trois atomes de carbone sur des copolymères éthylène-propylène
• C08L 51/06 - Compositions contenant des polymères greffés dans lesquels le composant greffé est obtenu par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carboneCompositions contenant des dérivés de tels polymères greffés sur des homopolymères ou des copolymères d'hydrocarbures aliphatiques ne contenant qu'une seule liaison double carbone-carbone

Abrégé

Laminates of the present invention include a substrate layer and at least one slip-coat layer. The slip-coat layer has a relatively low coefficient of friction. In one embodiment, the laminate forms at least a portion of a weather seal with the slip-coat making contact with, for example, a movable window of an automobile. In one aspect, the slip-coat includes (i) a high density polyethylene mixture including (a) a first high density polyethylene having a relatively low I2 and (b) a second high density polyethylene having a relatively high I2 (ii) a plastomer; (iii) a styrenic block copolymer; and (iv) a thermoplastic vulcanizate, and optionally (v) a low density polyethylene graft copolymer. In a particular embodiment, fatty acid amide slip agents are absent from the slip-coat composition.

Classes IPC  ?

• B32B 27/32 - Produits stratifiés composés essentiellement de résine synthétique comprenant des polyoléfines
• C08L 23/06 - Polyéthylène
• B60J 10/00 - Dispositions pour l'étanchéité

Abrégé

A support roller and dryer using the same are provided. The roller can include a hub, a ring concentrically disposed about the hub, a first thermoplastic elastomer disposed between the hub and the ring, and a second thermoplastic elastomer disposed about the ring. The dryer can include a drum for containing one or more items of clothing and one or more support rollers in communication with the drum.

Classes IPC  ?

• D06F 58/08 - Dispositifs d'entraînement
• B60B 33/00 - Roues à pivot en général

Abrégé

This invention pertains to separating an olefin stream into at least two olefin streams. The olefin stream that is to be separated is low in diene composition, which allows the olefin stream to be compressed at a relatively high temperature without causing fouling problems in the compressor system. The invention is particularly relevant to separating olefins obtained from an oxygen to olefins unit.

Classes IPC  ?

• C07C 7/00 - Purification, séparation ou stabilisation d'hydrocarburesEmploi d'additifs

Abrégé

A thermoplastic vulcanizate comprising a dynamically cured rubber, where the rubber is peroxide cured, and a thermoplastic phase, where at least 10% by weight of the thermoplastic phase includes an ultrahigh molecular weight plastic, where the ultrahigh molecular weight plastic is characterized by a Mw that is greater than 0.8 x 106 g/mole.

Classes IPC  ?

• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène

Abrégé

Provided are thermoplastic polymer compositions having a single melting point, articles made therefrom, and methods for elevating the melting point of low melting point polymers. Thermoplastic polymer compositions are composed of one or more high melting point polyolefins and a thermoplastic component that includes a low melting point polypropylene. High melting point polyolefins are composed of a stereoregular polypropylene having a tacticity similar to the low melting point polypropylene. The low melting point polypropylene includes, for example, propylene homopolymers and copolymers composed of propylene and one or more comonomers. Thermoplastic polymer compositions may also optionally contain any of the various additives commonly used in such polymer compositions, such as for example oils, etc. In one embodiment, thermoplastic polymer compositions are thermoplastic elastomer compositions that include an elastomeric component composed of an elastomer or rubber. The elastomeric component may be substantially or partially crosslinked to form a thermoplastic vulcanizate.

Classes IPC  ?

• C08L 23/14 - Copolymères du propylène

Abrégé

A method for preparing a thermoplastic vulcanizate, the method comprising introducing an elastomer and a thermoplastic resin to a reaction extruder, where the elastomer is not prepared by gas-phase polymerization methods, and where less than 75 parts by weight oil, per 100 parts by weight elastomer, is added to the extruder with the elastomer, introducing a curative to the extruder after said step of introducing an elastomer, introducing an oil to the extruder after said step of introducing an elastomer but before or together with said step of introducing a curative, and introducing an oil to the extruder after said step of introducing a curative.

Classes IPC  ?

• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène

Abrégé

A method for preparing a thermoplastic vulcanizate, the method comprising dynamically vulcanizing a rubber within a blend that includes the rubber and a thermoplastic polymer, where said dynamically vulcanizing is effected with a cure system that includes a hydrosilating agent and a catalyst, where the hydrosilating agent includes a compound including at least 3 silicon hydride groups defined by the formula where each R is independently a monovalent organic group or hydrogen, and where the silicon atoms of the respective silicon hydride groups are spatially separated by at least 6 atoms.

Classes IPC  ?

• C08L 23/04 - Homopolymères ou copolymères de l'éthylène
• C08L 23/10 - Homopolymères ou copolymères du propylène
• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène
• B29C 47/40 - utilisant au moins deux vis qui s'engrènent
• C08K 5/54 - Composés contenant du silicium
• C08K 5/00 - Emploi d'ingrédients organiques
• C08L 21/00 - Compositions contenant des caoutchoucs non spécifiés
• C08L 91/06 - Cires
• C08L 83/04 - Polysiloxanes

Abrégé

Provided are thermoplastic elastomer compositions, many dynamically vulcanized, with superior crystallization kinetics, methods for making the compositions and articles made therefrom. The thermoplastic elastomer compositions comprise at least a propylene polymer thermoplastic, a rubber and a crystallization additive. The processes for preparation of the thermoplastic elastomer compositions comprises dynamic vulcanization of mixture of a propylene polymer thermoplastic, a rubber and a cure agent followed by addition of a crystallization additive. Further, preparation of articles from the thermoplastic elastomer compositions may be accomplished through traditional thermoforming operations useful with conventional thermoplastics.

Classes IPC  ?

• C08L 23/10 - Homopolymères ou copolymères du propylène
• C08L 21/00 - Compositions contenant des caoutchoucs non spécifiés
• C08K 3/00 - Emploi de substances inorganiques en tant qu'adjuvants
• C08K 5/00 - Emploi d'ingrédients organiques

Abrégé

A thermoplastic vulcanizate comprising (i) a dynamically-cured rubber, and (ii) a thermoplastic polymer component, where the thermoplastic polymer component includes (a) a propylene-α-olefin thermoplastic copolymer characterized by including at least 5% by weight up to 35% by weight units deriving from α-olefms, and having a heat of fusion, as determined by DSC, of less than 80 J/g, (b) and a functionalized thermoplastic polymer.

Classes IPC  ?

• C08L 101/00 - Compositions contenant des composés macromoléculaires non spécifiés
• C08L 51/06 - Compositions contenant des polymères greffés dans lesquels le composant greffé est obtenu par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carboneCompositions contenant des dérivés de tels polymères greffés sur des homopolymères ou des copolymères d'hydrocarbures aliphatiques ne contenant qu'une seule liaison double carbone-carbone
• C08L 23/14 - Copolymères du propylène

Abrégé

The instant disclosure is directed to a thermoplastic vulcanizate composition comprising a dynamically-cured rubber; from about 20 to about 300 parts by weight of a thermoplastic resin per 100 parts by weight rubber and from about 30 to about 250 parts by weight additional oil per 100 parts by weight rubber; wherein the rubber comprises a multimodal polymer composition cured with a curing agent, the multimodal polymer composition comprising 45 to 75 wt% of a first polymer fraction and 25 to 55 wt% of a second polymer fraction, each comprising ethylene, a C3-C10 alpha-olefin, and a non-conjugated diene, wherein the polymer fractions have been polymerized using a Ziegler-Natta catalyst system, wherein the first polymer fraction has a Mooney viscosity of greater than or equal to about 150 ML(1+4@125°C), and the second polymer fraction has a Mooney viscosity of about 20 ML to about 120 ML; and about 10 phr to about 50 phr of an extender oil. A method of producing the thermoplastic vulcanizate is also disclosed.

Classes IPC  ?

• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène
• C08L 23/10 - Homopolymères ou copolymères du propylène

Abrégé

Thermoplastic vulcanizates having improved physical properties, including extrusion surface roughness can be achieved by a method that includes a first processing step to form a fully cured TPV base, a cooling step wherein the fully cured TPV base is solidified and a second processing step which imparts improved physical properties including improved extrusion surface roughness to the resultant TPV. The method may be adapted for use in conjunction with a peroxide curing agents to protect a portion of the thermoplastic, which may be polypropylene, from degradation by the peroxide curing agent. The adaptation to the methods may include the addition of a portion of the thermoplastic to the TPV after the peroxide curing agent has been added. The adaptation may also include one or more devolatalization steps with or without the addition of a stripping agent.

Classes IPC  ?

• C08L 23/10 - Homopolymères ou copolymères du propylène
• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène
• B29C 47/00 - Moulage par extrusion, c. à d. en exprimant la matière à mouler dans une matrice ou une filière qui lui donne la forme désirée; Appareils à cet effet (moulage par extrusion-soufflage B29C 49/04)

Abrégé

A thermoplastic vulcanizate comprising a dynamically-cured rubber, a thermoplastic polymer, and at least 2 percent by weight, based on the total weight of the thermoplastic vulcanizate, of a polyalphaolefm oligomer, where the polyalphaolefm oligomer is characterized by a kinematic viscosity per ASTM D445 at 100°C of at least 35 cSt.

Classes IPC  ?

• C08L 23/00 - Compositions contenant des homopolymères ou des copolymères d'hydrocarbures aliphatiques non saturés ne possédant qu'une seule liaison double carbone-carboneCompositions contenant des dérivés de tels polymères

Abrégé

Provided for preparing thermoplastic polymer blends is (1) an apparatus comprising a grinder (105), a mixer (120), at least one material transfer device (110), a weigh scale (125), means (115) for addition of additives to the mixer, a storage vessel (135), a processing device (155) and means (140) for feeding polymer to the processing device,- and (2) a process comprising mixing a known amount of a first material with a desired amount of at least one additive based on a predetermined weight ratio of additive to first material to form individual batches of pre-mix, storing the pre-mix batches in a storage vessel, continuously feeding the pre-mix from the storage vessel to a processing device, adding a polymer stream (145) to the processing device at a rate based on the first material feed rate to the processing device, optionally adding at least one vulcanizing agent stream (150) to the processing device at a rate based on the polymer stream feed rate to the processing device and melt mixing all materials in the processing device to form a thermoplastic polymer blend (160).

Classes IPC  ?

• B29B 7/24 - Éléments constitutifs, détails ou accessoiresOpérations auxiliaires pour alimentation
• B29B 7/74 - MélangeMalaxage utilisant d'autres mélangeurs ou des combinaisons de mélangeurs différents
• B29B 7/88 - Addition de charges
• B01F 15/04 - Réalisation de proportions prédéterminées de substances à mélanger
• B01F 13/10 - Installations pour effectuer des mélanges comprenant des combinaisons de mélangeurs de types différents
• G05D 11/13 - Commande du rapport des débits de plusieurs matériaux fluides ou fluents caractérisée par l'usage de moyens électriques
• G01G 13/285 - Aménagements apportés à un mécanisme de pesée pour commander le remplissage ou la vidange automatique comportant la variation d'une variable électrique qui est utilisée pour commander le remplissage ou la vidange du récipient impliquant une comparaison avec une valeur de référence
• G01G 19/38 - Appareils ou méthodes de pesée adaptés à des fins particulières non prévues dans les groupes pour le dosage de produits par pesée avant de les mélanger commandés par un programme, p. ex. par un ruban perforé

Abrégé

A thermoplastic elastomer having adhesion to steels, where the thermoplastic elastomer includes a dynamically crosslinked rubber, from more than 2.0 to 10 parts of a metal oxide or salt, and from 10 to 200 parts by weight of a functionalized polyolefin having pendant polar functional groups, where the polar functional groups are present at a level of 0.5 to 3.5 mole percent of the total repeating units of said functionalized polyolefin and the functionalized polyolefin is derived from polymerizing at least one monoolefin to form a semicrystalline polymer or is derived from hydrogenating the polydiene blocks of a block copolymer, and where the parts by weight are based on 100 parts by weight of crosslinked rubber.

Classes IPC  ?

• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène
• C08L 21/00 - Compositions contenant des caoutchoucs non spécifiés
• C08K 3/20 - OxydesHydroxydes
• C08K 3/26 - CarbonatesBicarbonates
• C09J 11/04 - Additifs non macromoléculaires inorganiques
• C08L 51/06 - Compositions contenant des polymères greffés dans lesquels le composant greffé est obtenu par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carboneCompositions contenant des dérivés de tels polymères greffés sur des homopolymères ou des copolymères d'hydrocarbures aliphatiques ne contenant qu'une seule liaison double carbone-carbone

Abrégé

A method of preparing a thermoplastic vulcanizate, the method comprising dynamically vulcanizing a rubber within a blend with a thermoplastic resin, where the dynamic vulcanization is effected with a cure system that includes a free-radical cure agent and triallyl isocyanurate.

Classes IPC  ?

• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène
• C08L 23/10 - Homopolymères ou copolymères du propylène

Abrégé

A thermoplastic vulcanizate comprising dynamically-cured rubber, a functionalized thermoplastic polymer, and a functionalized hydrocarbon resin.

Classes IPC  ?

• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène
• C08L 51/06 - Compositions contenant des polymères greffés dans lesquels le composant greffé est obtenu par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carboneCompositions contenant des dérivés de tels polymères greffés sur des homopolymères ou des copolymères d'hydrocarbures aliphatiques ne contenant qu'une seule liaison double carbone-carbone
• C08L 23/10 - Homopolymères ou copolymères du propylène

Abrégé

The invention described is a process for the preparation of dynamically vulcanized thermoplastic elastomers comprising melt processing under shearing conditions in melt reaction extruder, A) at least one thermoplastic resin, B) at least one vulcanizable gas-phase elastomer having a Mooney viscosity (ML1+4(125°C)) of from 65 to 450, C) a curing agent or agents, and D) process oil, wherein said process oil D) is added to the extruder in at least three oil injection positions located a) at least one location before or within the first 15% of the total length of the extruder; b) at least one other location prior to, at or within 10% total extruder length after the onset of the vulcanization of said gas-phase elastomer; and c) at least one location subsequent to the location of the point at which the vulcanization of said gas-phase elastomer is substantially completed; wherein the direct oil injection locations into the extruder are positioned at or immediately before one or more distributive mixing elements, which distributive mixing elements are immediately followed by one or more dispersive mixing elements. Thermoplastic vulcanizates capable of being extrusion molded with a smooth surface and low surface spot count, in addition to excellent elastomeric properties, are obtained through the use of the process described.

Classes IPC  ?

• C08F 8/50 - Dépolymérisation partielle
• B29C 47/10 - Alimentation en matière à mouler de l'extrudeuse

Abrégé

A method of preparing a thermoplastic vulcanizate, the method comprising continuously dynamically vulcanizing a rubber within a blend with a thermoplastic resin, where the dynamic vulcanization is effected with a cure system that includes a free-radical cure agent, and a coagent- wetted carrier where the coagent-wetted carrier includes a multi- functional acrylate coagent, a multi-functional methacrylate coagent, or both a multi-functional acrylate and multi-functional methacrylate coagent.

Classes IPC  ?

• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène
• C08L 23/10 - Homopolymères ou copolymères du propylène
• C08K 5/01 - Hydrocarbures

Abrégé

The invention described relates to formed profiles comprising microcellular TPE foam compositions, and articles therefrom, wherein the TPE are thermoplastic vulcanizates. The foamed thermoplastic elastomer profile comprises a foamable thermoplastic elastomer composition having a) a cross-linkable hydrocarbon rubber in the presence of b) a thermoplastic polyolefin resin having a Tm greater than 120°C wherein said composition further comprising: a) 25 to 30 wt% of a partially or fully vulcanized reaction product of said cross-linkable hydrocarbon rubber with a cross-linking agent, said reaction product being present as a dispersed phase; b) 7 to 12 wt% of said thermoplastic resin as a continuous phase; c) 8 to 22 wt% of an elastomeric thermoplastic modifier comprising 1) 3 to 7 wt% copolymers of propylene with one or more of ethylene and C4-C10 alpha-olefins, said copolymers having a Tm greater than 20°C and less than 120°C, and, 2) 5 to 15 wt% hydrogenated, triblock styrenic copolymers from styrene and isoprene; and, optionally, d) 3 to 12 wt% solid filler; and/or e) 35 to 45 wt% of non-aromatic hydrocarbon oil; wherein said wt% amounts are based upon the total weight of the composition, and where the composition has been prepared by a process comprising dynamically vulcanizing said composition. The foamed thermoplastic elastomer profiles having smooth surfaces, improved low water absorption, improved compression set and compression load deflection.

Classes IPC  ?

• C08L 23/10 - Homopolymères ou copolymères du propylène
• C08L 53/02 - Compositions contenant des copolymères séquencés possédant au moins une séquence d'un polymère obtenu par des réactions ne faisant intervenir que des liaisons non saturées carbone-carboneCompositions contenant des dérivés de tels polymères contenant des monomères vinylaromatiques et des diènes conjugués
• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène
• C08L 23/14 - Copolymères du propylène

Abrégé

A thermoplastic vulcanizate comprising a dynamically-cured rubber, and a thermoplastic resin, where the rubber has been cured with a peroxide in the presence of a coagent selected from the group consisting of a high-vinyl polydiene, high-vinyl polydiene copolymer, &agr;-&bgr;-ethylenically unsaturated metal carboxylate, or mixture thereof.

Classes IPC  ?

• C08L 21/00 - Compositions contenant des caoutchoucs non spécifiés
• C08L 23/00 - Compositions contenant des homopolymères ou des copolymères d'hydrocarbures aliphatiques non saturés ne possédant qu'une seule liaison double carbone-carboneCompositions contenant des dérivés de tels polymères
• C08K 5/14 - Peroxydes
• C08K 5/09 - Acides carboxyliquesLeurs sels métalliquesLeurs anhydrides

Abrégé

A process for the for the preparation of dynamically vulcanized thermoplastic elastomers is described. The process comprises melt processing under high shear conditions A) at least one thermoplastic engineering resin, B) at least one vulcanizable rubber, C) a curing agent or curing agents, and D) at least one additional thermoplastic engineering resin in the form of solid particles having an effective diameter of not less than 0.05 mm, wherein said solid particles D) are added to a molten mass of A), B) before, during or after the addition of C) but prior to substantial completion of the vulcanization of B). The process provides a means to avoid substantial degradation or unwanted cross-linking of the thermoplastic engineering resin and provides a means of controlling the reaction temperature during the curing, vulcanization, or cross-linking of the rubber.

Classes IPC  ?

• B29C 47/10 - Alimentation en matière à mouler de l'extrudeuse
• C08K 5/00 - Emploi d'ingrédients organiques
• C08L 23/12 - Polypropylène
• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène

Abrégé

The invention relates to a method of preparing a thermoplastic vulcanizate comprising: a) melt processing a blend of thermoplastic polymer and vulcanizable elastomer in a multi-screw extruder (10A) having at least three intermeshing screws (14) , wherein said screws have 3-170 mixing zones, and said extruder having a L/D ratio of 15-100, and a screw profile that has 3 to 17 meshes per L/D,- b) adding at least one curing agent to the melt-processed blend of a) in at least one location in the first 46% of the length of said extruder, or adding at least one curing agent to the melt-processed blend of a) in a second extruder, so as to initiate curing of the blend: and, curing at least partially said elastomer by reactive melt processing. Improved processing, reaction kinetics and efficiencies are achieved, as well as thermoplastic vulcanizate products having decreased weight gain when placed in mineral oils.

Classes IPC  ?

• B29C 47/40 - utilisant au moins deux vis qui s'engrènent
• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène

Abrégé

Described in one aspect is a process for preparing a low durometer thermoplastic vulcanizate composition comprising melt blending one or more thermoplastic polymer(s) with a cross-linkable elastomer under conditions of dynamic vulcanization; adding at or after the start of the melt blending at least one curative agent for the elastomer so as to cross-link the elastomer during the melt blending; introducing process oil into the melt blending before, during and/or after the addition of the curative agent; and, extruding a fully crosslinked thermoplastic vulcanizate having a Shore A Hardness of less than 25.

Classes IPC  ?

• C08L 23/16 - Copolymères de l’éthylène et du propylène ou de l’éthylène, du propylène et de diène
• C08L 23/10 - Homopolymères ou copolymères du propylène
• C08L 91/06 - Cires