Mitsui Petrochemical Industries, Ltd.

Hiroaki Kitani

Norio Kashiwa

Junichi Yoshitake

Mamoru Kioka

Takeshi Muranaka

Masaaki Kawasaki

Akira Mizuno

Shuji Minami

Kenichi Tominari

Shigeki Nagamatsu

Hot-melt adhesive

An .alpha.-olefinic random copolymer containing an .alpha.-olefin component having 5 to 10 carbon atoms and an .alpha.,.omega.-nonconjugated diene component having 6 to 20 carbon atoms, and optionally, a straight .alpha.-olefin component having 2 to 20 carbon atoms, wherein the copolymer comprises:

.alpha.-olefinic random copolymer and production process thereof

A branched alpha-olefinic polymer composition having excellent melt flowability, good moldability and excellent melt tension and comprising at least two branched alpha-olefinic polymers each composed of (A) recurring units derived from a branched alpha-olefin containing 5 to 10 carbon atoms and having a branch at the 3-position or a position of a higher number and (B) recurring units derived from a linear alpha-olefin containing 2 to 20 carbon atoms; and a process for producing this polymer composition by a multiplicity of polymerization steps using a catalyst formed from (A) a highly stereoregular titanium catalyst component comprising magnesium, titanium, halogen and an electron donor as essential ingredient, (B) an organoaluminum compound and (C) an electron donor.

Branched alpha-olefin polymer composition and process for its production

Improved process for producing olefin polymer or copolymer characterized by using (I) a solid catalyst component (A) which is the product of reaction of (a) a magnesium compound in the liquid state having no reducing ability with (b) a titanium compound in the liquid state in the presence of an electron donor having no active hydrogen, said magnesium compound (a) being a liquid magnesium compound or a solution of a magnesium compound or being obtained by contacting the magnesium compound with at least one electron donor selected from the group consisting of alcohols, organic carboxylic acids, aldehydes, amines and mixtures thereof, or the product of reaction of the magnesium compound (a) with the titanium compound (b) in the absence of the electron donor having no active hydrogen atom followed by treatment with the electron donor having no active hydrogen atom, and (II) the mole ratio of the compound (a) to the compound (b), calculated as metal atoms, is at least about 2.

Process for producing olefin polymers or copolymers

Improved process for producing olefin polymer or copolymer characterized by using (I) a solid catalyst component (A) which is he product of reaction of (a) a magnesium compound in the liquid state having no reducing ability with (b) a titanium compound in the liquid state in the presence of an electron donor having no active hydrogen, said magnesium compound (a) being a liquid magnesium compound or a solution of a magnesium compound or being obtained by contacting the magnesium compound with at least one electron donor selected from the group consisting of alcohols, organic carboxylic acids, aldehydes, amines and mixtures thereof, or the product of reaction of the magnesium compound (a) with the titanium compound (b) in the absence of the electron donor having no active hydrogen atom followed by treatment with the electron donor having no active hydrogen atom, and (II) the mole ratio of the compound (a) to the compound (b), calculated as metal atoms, is at least about 2.

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Waki, Japan

Hiroaki Kitani