| abstract |
An object of the present invention is to obtain an ethylene /? - olefin / nonconjugated polyene copolymer having a small compression set at low temperature, flexibility, excellent balance between rubber elasticity at low temperature and tensile strength at room temperature, The ethylene polymer is preferably an ethylene /? - olefin copolymer containing units derived from ethylene A, units derived from? -Olefin B having 4 to 20 carbon atoms, and units derived from nonconjugated polyene C and satisfying (1) to (4) Olefin / non-conjugated polyene copolymer. (1) the molar ratio of A to B is 40/60 to 90/10, (2) the content of the unit derived from C is 0.1 to 6.0 mol% (3) ML (1 + 4) 125 DEG C is 5 to 100, (4) The B value is 1.20 or more. |