Thermoplastic vulcanizates and their use

Details Thermoplastic vulcanizates and their use Thermoplastic vulcanizates and their use

2005-02-04

2011-12-13

Nutter, Nathan M (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S232000, C525S240000

Reexamination Certificate

active

08076416

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>visof less than 0.9 and deriving from monomer selected from the group consisting of ethylene and mono-α-olefins, and where said non-long-chain thermoplastic resin includes one or more polymers or copolymers having a viscosity average branching index <gN>visof 0.9 or more.

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