Patent ID: 9458276
Filing Date: 2016-10-04
CPC Classification: C08F

Claim Text:
1. An elastic terpolymer, which is a copolymer of 40 to 70 wt % of ethylene, 15 to 55 wt % of a C 3 -C 20 alpha-olefin, and 0.5 to 20 wt % of a diene as obtained in the presence of a group 4 transition metal catalyst, wherein the elastic terpolymer satisfies that: the weight average molecular weight measured by GPC is 100,000 to 500,000; and ii) the ethylene content x (wt %) and the crystallization enthalpy y (ΔHc; J/g) of the copolymer measured by DSC satisfy the relational expression given by 1.55x−80.00≦y≦1.55x−75.00.