Graft modified ethylene alpha-olefin copolymer obtained by graft copolymerzing an ethylene/alpha-olefin copolymer with a polar monomer

摘要

A graft modified ethylene/alpha-olefin copolymer obtained by graft polymerizing an ethylene/alpha-olefin of 3 to 20 carbon atoms copolymerizing with a polar monomer in the presence of a catalyst for olefin polymerization comprising an organoaluminum oxy-compound (a) and at least two kinds of transition metal compounds (b). This ethylene/alpha-olefin copolymer has high melt tension and high flowability. An ethylene copolymer composition comprising the above-mentioned graft modified ethylene/alpha-olefin copolymer and polyolefin. The graft modified ethylene/alpha-olefin copolymer of the invention is excellent in heat stability and moldability. From this copolymer, a film having a high transparency and good adhesion to highly polar materials can be produced. The ethylene copolymer composition of the invention is excellent in heat stability and moldability. From this composition, a film having high transparency and good adhesion to highly polar materials can be produced.