Elastic alpha-olefin/cyclic olefin copolymers

Details Elastic alpha-olefin/cyclic olefin copolymers Elastic alpha-olefin/cyclic olefin copolymers

C - Chemistry, Metallurgy

08

F

C08F 210/16 (2006.01) C08F 210/02 (2006.01) C08F 232/00 (2006.01) C08F 232/08 (2006.01) C08L 23/10 (2006.01) C08L 23/16 (2006.01)

Patent

CA 2154152

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 rubber loss modulus plateau over the temperature range from Tg to above 100 °C, and are optionally lightly cross-linked or plasticized to further extend their usueful temperature range.

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