C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 23/08 (2006.01) C08F 10/00 (2006.01) C08F 210/16 (2006.01) C08F 255/02 (2006.01) C08F 255/04 (2006.01) C08F 255/08 (2006.01) C08F 287/00 (2006.01) C08F 297/08 (2006.01) C08L 23/04 (2006.01) C08L 51/06 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01)
Patent
CA 2103380
An ethylene/.alpha.-olefin copolymer composition comprising an ethylene/.alpha.-olefin copolymer and another ethylene/.alpha.- olefin copolymer [B1]. The former ethylene/.alpha.-olefin copolymer can be prepared in the presence of a catalyst for olefin polymerization containing an organoaluminum oxy- compound (a) and at least two kinds of specific metallocene compounds (b), and the latter ethylene/.alpha.-olefin copolymer [B1] can be prepared in the presence of a catalyst for olefin polymerization containing an organoaluminum oxy- compound (a) and a specific metallocene compound (b'). A graft modified ethylene/.alpha.-olefin copolymer composition obtained by graft copolymerizing an ethylene/.alpha.- olefin copolymer composition with a polar monomer. The ethylene/.alpha.-olefin copolymer composition comprises an ethylene/.alpha.-olefin copolymer prepared in the presence of a catalyst for olefin polymerization containing an organoaluminum oxy-compound (a) and a specific metallocene compound (b'), and the above ethylene/.alpha.-olefin copolymer [B1]. An ethylene copolymer composition comprising the above-mentioned graft modified ethylene/.alpha.-olefin copolymer composition and polyolefin. A multi-stage olefin polymerization process comprising a stage of preparing an ethylene/.alpha.-olefin copolymer [A1] in the presence of a catalyst for olefin polymerization containing an organoaluminum oxy-compound (a), a specific metallocene compound (b-I) and a specific metallocene compound (b-II) and a stage of preparing an ethylene/.alpha.- olefin copolymer [B1] in a different polymerizer from that for the copolymerization reaction of the above stage in the presence of a catalyst for olefin polymerization containing an organoaluminum oxy-compound (a) and a specific metallocene compound (b'). The ethylene/.alpha.-olefin copolymer composition of the invention is excellent in heat stability and moldability. From this composition, a film of high transparency, high mechanical strength and high blocking resistance can be produced. The graft modified ethylene/.alpha.-olefin copolymer composition of the invention is excellent in moldability. From this composition, a film having high transparency and good adhesion to highly polar materials can be produced. The ethylene copolymer composition of the invention is excellent in moldability. From this composition, a film having high transparency and good adhesion to highly polar materials can be produced. The multi-stage olefin polymerization process of the invention can prepare an ethylene/.alpha.-olefin copolymer composition of good heat stability and moldability from which a film of high transparency and high mechanical strength can be produced.
Inagaki Hajime
Ohta Seiji
Takahashi Mamoru
Todo Akira
Tsutsui Toshiyuki
Mitsui Chemicals Inc.
Smart & Biggar
LandOfFree
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