Elastomer blends

Claim 1

A thermoplastic elastomeric blend having a lowered melt processing temperature comprising: (A) from 5 to 97.5 weight percent of a segmented thermoplastic copolyester composition consisting essentially of a multiplicity of recurring long-chain ester units and short-chain ester units joined head-to-tail through ester linkages, said long chain ester units being represented by the formula ##STR5## and said short-chain units being represented by the formula ##STR6## where G is a divalent radical remaining after the removal of terminal hydroxyl groups from a poly(alkylene oxide) glycol having a molecular weight of about 400-6,000 and a carbon to oxygen ratio of about 2.0-4.3; R is a divalent radical remaining after removal of carboxyl groups from one or more dicarboxylic acids having molecular weights less than about 300 and D is a divalent radical remaining after removal of hydroxyl groups from one or more diols having a molecular weight less than about 250; provided said short-chain ester units amount to about 15-95 percent by weight of said copolyester, and at least about 50 percent of said short-chain ester units are identical and (B) from 2.5 to 95 weight percent of a partially crosslinked, thermoplastic, melt-processible, elastomeric blend of (a) a copolymer of 30 to 85 weight percent repeating units derived from ethylene and the remainder repeating units derived from one or more ethylenically unsaturated organic comonomers selected from the class consisting of esters of ethylenically unsaturated C 3 -C 20 mono- or dicarboxylic acids, vinyl esters of saturated C 2 -C 18 carboxylic acids, vinyl alkyl ethers wherein the alkyl group has 1-8 carbon atoms, acrylonitrile, methacrylonitrile, norbornene, alpha-olefins of 3-12 carbon atoms, and vinyl aromatic compounds, and optionally up to 30 weight percent of an additional monomer selected from the class consisting of ethylenically unsaturated C 3 -C 20 carboxylic acids, carbon monoxide and sulfur dioxide; and (b) between 5 and 75 weight percent, based on composition (B), of a vinyl or vinylidene halide homopolymer or coolymer with a monomer selected from the group consisting of vinyl esters, acrylonitrile, esters of unsaturated carboxylic acids and vinyl ethers, wherein the comonomer content in (a) is such that the ethylene copolymer is compatible with the vinyl or vinylidene halide polymer.