ETHYLENE COPOLYMER, COMPOSITION CONTAINING THE COPOLYMER, AND USE OF THE SAME.

摘要

Disclosed are a novel ethylene/a-olefin copolymer having excellent crosslinking characteristics; an expansion molded body having low specific gravity and low compression set (CS), a composition which enables to obtain such an expansion molded body and a member for foot wear composed of such an expansion molded body; an ethylene copolymer composition having an excellent balance between weather resistance and mechanical strength, and an electric wire coating material and a sheath for electric wire each using the ethylene copolymer composition; and a thermoplastic elastomer which enables to produce a molded body having an excellent balance between mechanical strength and toughness. Specifically disclosed is an ethylene copolymer (A) which is composed only of ethylene and an a-olefin having 3-20 carbon atoms. This ethylene copolymer (A) is characterized by having (a) a vinyl group content per 1000 carbon atoms as determined by infrared absorption measurement, (b) MFR10/MFR2.16 and (c) a d ensity respectively within specific ranges.