Abstract: A method for preparing a nanoclay-filled thermoplastic vulcanizate, the method comprising introducing an olefinic thermoplastic vulcanizate, a functionalized thermoplastic resin, and a surface-modified nanoclay, where the blending takes place at a temperature above the melt temperature of the thermoplastic vulcanizate but below the temperature at which the surface-modified nanoclay degrades.

Abstract: 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.

Abstract: 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.

Abstract: In a process for producing a polymer blend, at least one first monomer is polymerized in a first slurry phase reaction zone in the presence of a supported first catalyst comprising a Ziegler-Natta component to produce a thermoplastic first polymer having a crystallinity of at least 30%. At least part of said first polymer is then contacted with at least one second monomer different from said first monomer and at least one polyene in a second solution phase reaction zone in the presence of a second catalyst under conditions to produce and at least partially cross-link said second polymer such that said second polymer comprises at least a fraction which is insoluble in xylene and has a crystallinity of less than 20%.

Abstract: A composition comprising a dynamically-cured rubber and thermoplastic resin, where the rubber includes one or more mer units of divinyl benzene, and where the rubber is dynamically cured with a free-radical curative. In one or more embodiments, the rubber is highly cured, and therefore the composition may exhibit technologically useful engineering properties. Also, this cure can be achieved in one or more embodiments with reduced curative and/or reduced diene content.

Abstract: 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.

Abstract: A process for producing thermoplastic vulcanizates, the process comprising (i) dynamically vulcanizing a rubber with a curative in a first stage, where the rubber is within a blend that includes the rubber, a thermoplastic resin, and the curative, where said step of dynamically vulcanizing occurs at a temperature at or above the melting point of the thermoplastic resin, where said step of dynamically vulcanizing employs a peroxide curative, and where said rubber includes polymeric units deriving from 5-vinyl-2-norbornene, (ii) continuing said step of dynamically vulcanizing to cause phase inversion of the blend to thereby convert the thermoplastic resin into a continuous phase, (iii) maintaining the blend at or above the melting point of the thermoplastic resin after the phase inversion, and (iv) introducing molten thermoplastic resin into the blend in a second stage, where said step of introducing molten thermoplastic resin occurs after phase inversion but before the blend is cooled to a temperature below th

Abstract: 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, ?-?-ethylenically unsaturated metal carboxylate, or mixture thereof.

Abstract: A thermoplastic vulcanizate comprising a dynamically cured rubber, and from about 20 to about 400 parts by weight of a thermoplastic resin per 100 parts by weight rubber, where said thermoplastic resin includes at least 0.1 percent by weight and less than 5.0 percent by weight, based upon the entire weight of said thermoplastic resin, of a long-chain branched polyolefin, with the remainder of said thermoplastic resin including a non-long-chain branched thermoplastic resin, where said long-chain branched polyolefin includes one or more polymers or copolymers having a viscosity average branching index <gN>vis of less than 0.9 and deriving from monomer selected from the group consisting of ethylene and mono-?-olefins, and where said non-long-chain thermoplastic resin includes one or more polymers or copolymers having a viscosity average branching index <gN>vis of 0.9 or more.

Abstract: A process for producing a thermoplastic elastomer composition, the process comprising synthesizing an elastomeric copolymer by polymerizing ethylene, an ?-olefin, and optionally a diene monomer within the gas phase to thereby produce a gas-phase elastomeric copolymer, blending the gas-phase elastomeric copolymer with a thermoplastic polymer to form a mix of the elastomeric copolymer and thermoplastic polymer, and dynamically vulcanizing the gas-phase elastomeric copolymer within the mix of the elastomeric copolymer and thermoplastic polymer.

Abstract: A composition comprising a dynamically-vulcanized rubber, and a copolymer of propylene and at least one of (i) an ?, internal non-conjugated diene monomer and (ii) an olefin containing a labile hydrogen, where the copolymer includes from about 0.1 to about 10 mole percent by weight units deriving from ?, internal non-conjugated diene monomer or from about 0.5 to about 10 mole percent units deriving from an olefin containing a labile hydrogen, and where the compositional distribution of the ?, internal non-conjugated diene monomer or the olefin containing a labile hydrogen is narrow as determined by a crystallization temperature distribution parameter R that is less than 2.0.

Abstract: A composition comprising (i) a dynamically-cured rubber, (ii) from about 20 to about 300 parts by weight of a thermoplastic resin per 100 parts by weight rubber, (iii) from 0.2 to 0.9 parts by weight stannous chloride per 100 parts by weight rubber, and (iv) from 0.25 to 4.0 parts by weight metal oxide per 100 parts by weight rubber.

Abstract: Random propylene thermoplastic copolymers can be used to increase the elongation to break and toughness of thermoplastic vulcanizates. Semi-crystalline polypropylene is a preferred thermoplastic phase. The rubber can be olefinic rubbers. Random thermoplastic polypropylene copolymers are different from conventional Ziegler-Natta propylene copolymers as the compositional heterogeneity of the copolymer is greater with Ziegler-Natta copolymers. This difference results in substantial differences in properties (elongation to break and toughness) between thermoplastic vulcanizates modified with random thermoplastic propylene copolymers and those modified with conventional Ziegler-Natta propylene copolymers. An increase in elongation to break results in greater extensibility in the articles made from a thermoplastic vulcanizate.