Ethylene- alpha -olefin copolymer and composition, and film, laminate and electrical insulating material comprising same

摘要

An ethylene- alpha -olefin copolymer having: (A) a density d of 0.86 to 0.96 g/cm3; (B) a melt flow rate MFR of 0.01 to 200 g/10 min; (C) a molecular weight distribution Mw/Mn of 1.5 to 4.5; (D) a composition distribution parameter Cb of 1.08 to 2.00; and (E) an orthodichlorobenzene-soluble content X (wt %), at 25 DEG C. a density of d (g/cm3) and a melt flow rate MFR (g/10 min) satisfying that: (i) when the density (d) and the melt flow rate MFR satisfy relationship (I):d-0.008xlogMFR>/=0.93(I)the orthodichlorobenzene-soluble content X satisfies relationship (II):X<2.0(II)(ii) when the density d and the melt flow rate MFR satisfy relationship (III):d-0.008xlogMFR<0.93(III)the orthodichlorobenzene-soluble content X satisfies relationship (IV):X<9.8x103x(0.9300-d+0.008xlogMFR)2+2.0(IV)