Elastomeric thermoplastic compositions

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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524413, 524426, 524427, 524445, 525211, 525232, 525236, 525240, C08K 300, C08K 308, C08K 326

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048331945

ABSTRACT:
Blends of crystalline and amorphous polymers are utilized to form uncured thermoplastic elastomer compositions which have good properties such as processability, tensile strength, tear strength, good weatherability, good friction, and especially low deformation at high temperatures as about 180.degree. F. The thermoplastic elastomer composition contains amorphous ethylene-propylene type rubber, crystalline ethylene-propylene type rubber, and crystalline olefins such as polyethylene. The crystalline polymers generally impart the necessary thermoplasticity for melt processing, and the like.

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