Mitsubishi Chemical Industries Limited

Shigeaki Okano

Toru Tanaka

Katsuhiko Hayashi

Yoshinori Suga

Eiji Tanaka

Nobuo Enokido

Masatoshi Suzuki

Hidehito Kato

Kazuo Yamaguchi

Yoshiteru Sakurazawa

A modified polyolefin resin and a composition containing therein such modified polyolefin, having excellent adhesive property and heat-sealing property at the time of high speed forming operations, the modified polyolefin resin consisting essentially of: a copolymer of ethylene and .alpha.-olefin having 4 or more carbon atoms, the copolymer having a density in a range of from 0.890 to 0.910 g/cm.sup.3, a ratio of a weight-average molecular weight (Mw) to a number-average molecular weight (Mn) of Mw/Mn=2 to 15, and a product of a melt tension (g) and a melt-index (g/10 min.) of a molten resin measured at 160.degree. C. of 4 or below; and unsaturated carboxylic acid or derivatives thereof grafted on the ethylene type copolymer at a ratio of from 0.01 to 3% by weight.

Modified polyolefin resin and a composition containing the same

A process for producing a laminate which comprises laminating a composition comprising from 70 to 98% by weight of a crystalline ethylene-vinyl acetate copolymer having a vinyl acetate content of from 5 to 15% by weight, and from 2 to 30% by weight of a modified ethylene copolymer obtained by graft-polymerizing at least 0.03 and less than 1% by weight of maleic anhydride to a copolymer of ethylene with an .alpha.-olefin of at least 3 carbon atoms having a crystallinity of less than 30%, on a polyamide resin, a polyester resin or a saponified ethylene-vinyl acetate copolymer, in a molten state.

Laminate and process for its production

In a process for polymerizing an olefin in the presence of a catalyst system combining an organoaluminum compound with a hydrocarbon insoluble solid catalytic component prepared by treating a hydrocarbon solution containing a magnesium compound, a titanium compound and a zirconium compound with an aluminum halide having the formula

Process for polymerizing olefin

A process for the preparation of polyolefins, polymerizing olefins with use of a solid catalyst separated from a reaction mixture which is obtained by reducing a halogen-containing compound of vanadium with an organic aluminum compound in the presence of an ether and an organic aluminum compound.

Growing community of inventors

Yamato, Japan

Shigeaki Okano