Patent ID: 9637579
Date: 2017-05-02
CPC Classifications: C08F,C08L

Claim:
1. An elastic terpolymer of 40 to 70 weight % of ethylene, 15 to 55 weight % of a C 3 -C 20 alpha-olefin, and 0.5 to 20 weight % of a diene obtained in the presence of a group 4 transition metal catalyst, of which i) the weight average molecular weight measured by GPC is 100,000 to 500,000, and ii) Δ tan δ, the difference between the tan δ values at the angular frequencies of 0.2 rad/s and 100.0 rad/s measured at 100° C. by using a rubber process analyzer, is 0.5 or less.