Patent ID: 8962776
Filing Date: 2015-02-24
Classification: C08F,Y10S

Abstract:
1. An ethylene-α-olefin-nonconjugated polyene copolymer comprising ethylene units, α-olefin units and nonconjugated polyene units, wherein the copolymer satisfies the following requirements (A), (B), (C), (D) and (E), (A): the intrinsic viscosity [η] is 0.5 to 1.8 dl/g, (B): the content of the ethylene units is 50 to 90 mol % and the content of the α-olefin units is 50 to 10 mol % where the sum total of the content of the ethylene units and the content of the α-olefin units is taken as 100 mol %, (C): the iodine value is 1 to 50, (D): the ratio of tan δ taken at 100° C. and 2 cpm to tan δ taken at 100° C. and 1000 cpm is from 1.0 to 1.7, (E): the ratio of the Z-average molecular weight to the number average molecular weight is from 15 to 25 and the weight average molecular weight to the number average molecular weight is from 3 to 5.