Process for producing elastic thermoplastic .alpha.-olefin/cycli

Details Process for producing elastic thermoplastic .alpha.-olefin/cycli Process for producing elastic thermoplastic .alpha.-olefin/cycli

1993-01-19

1998-11-17

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526126, 526127, 526133, 526134, 526151, 526153, 526170, 526281, 526308, C08F 4642, C08F23204

Patent

active

058377875

ABSTRACT:
Rubbery, amorphous cyclic olefin/.alpha.-olefin copolymers in a molar ratio from 5/95 to 30/70. The copolymers are rubbery and have the general properties of thermoplastic elastomers, e.g. good elastic recovery, toughness, and high elasticity, and have a relatively low glass transition temperature (Tg) to avoid brittleness and hardness under normal use temperature. The copolymers also have a high molecular weight, a narrow molecular weight distribution and a uniform, random comonomer distribution to impart a rubbery loss modulus plateau over the temperature range from Tg to above 100.degree. C., and are optionally lightly crosslinked or plasticized to further extend their useful temperature range.

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