Toa Nenryo Kogyo Kabushiki Kaisha

Tonen Corporation

Yoshiharu Doi

Satoshi Ueki

Hiroyuki Furuhashi

Kazuo Soga

Makoto Miyazaki

Shigeo Suzuki

Polymers of 1,7-octadiene wherein polymerization occurs simultaneously by 1,8- and 1,2-addition.

Octadiene polymer and process for producing the same

Polymers of 1,4-pentadiene having an Mw/Mn of 1.05 to 1.4 are produced by polymerizing 1,4-pentadiene in the presence of catalyst comprising a vanadium chelate compound and an organoaluminum compound.

Narrow molecular weight distribution hydrocarbon soluble homopolymer of

A heptadiene polymer comprising the repeating units ##STR1## and having a number-average molecular weight of 2,000-500,000.

Heptadiene polymer and process for producing the same

1,4-Addition polymers or copolymers of diolefins useful as a functional or active polymer is provided which comprises, in combination, the following recurring units (A) and (B): ##STR1## wherein n=4 to 6 and A/B mole ratio=0 to 98/100 to 2.

Diolefin polymer of copolymer and a process for the production of the

A process for producing a propylene polymer having a carbonyl group at the terminal, said process comprising polymerizing propylene to give a living propylene polymer in the presence of a catalyst composed of beta-diketone vanadium chelate and an aluminum compound represented by the formula R.sub.2 AlX (wherein R is a hydrocarbon group having 1 to 8 carbon atoms and X is a halogen atom), and reacting the living propylene polymer with a carbonylating agent.

Process for producing propylene polymer

A catalyst for polymerization of olefins which comprises a vanadium compound of the formula: ##STR1## (where R.sup.1 is an alkyl group or aryl group having 1 to 8 carbon atoms; and R.sup.2 is an alkyl group or aryl group having from 1 to 8 carbon atoms, or hydrogen) and the organoaluminum compound of the formula R.sub.2 AlX (where R is a hydrocarbon group having 1 to 8 carbon atoms, and X is a halogen atom).

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Kanagawa, Japan

Yoshiharu Doi