Mitsui Chemicals, Inc.

Hidetatsu Murakami

Masaaki Kawasaki

Keiji Okada

Terunori Fujita

Mamoru Takahashi

Shigenobu Ikenaga

Kotaro Ichino

Takashi Hakuta

Kenji Doi

Masaaki Yasuda

Kazuyuki Takimoto

Yasuhiro Takano

Keiji Watanabe

Makoto Kamimura

Ken Maeda

Yasuhiro Hasada

Toshio Murakami

Akira Kumagae

Toshizi Nishimura

It is an object of the present invention to provide a non-conjugated cyclic diene and a non-conjugated cyclic diene composition which enable the production of a polymer based on non-conjugated cyclic diene which makes it possible to produce a (co)polymer at a high degree of polymerization activity, and a method of producing a polymer based on non-conjugated cyclic diene which makes it possible to produce a (co)polymer at a high degree of polymerization activity. A non-conjugated cyclic diene is used which meets at least one of the following requirements: (1) it contains a compound having a seven-membered cyclic triene hydrocarbon structure in a specific amount or less and (2) it contains a conjugated polyene compound having an eight-membered bicyclic hydrocarbon structure in a specific amount. Also, in a method of producing a non-conjugated cyclic diene polymer, the aforementioned non-conjugated cyclic diene is supplied to the polymerization or copolymerization using an olefin polymerization catalyst containing an organic aluminum oxy compound and/or an ionizing ionic compound. Also, in another method of producing a non-conjugated cyclic diene polymer, a non-conjugated cyclic diene which is obtained by bringing a crude non-conjugated cyclic diene into contact with an alkali and then removing at least a part of a low-boiling point fraction and at least a part of a high-boiling point fraction is used for the polymerization.

Non-conjugated cyclic diene, non-conjugated cyclic diene composition and method of producing polymer based on non-conjugated cyclic diene

A silicon-containing olefin copolymer is provided which comprises (a) a constituent unit derived from &#x2014;CH&#x2014;CH&#x2014; such as ethylene, (b) a constituent unit derived from &#x2014;CH&#x2014;CHR&#x2014; where R is a hydrocarbon group of 1 to 18 carbon atoms, and (c) a constituent unit containing a specific silicon-containing group. A silicon-containing olefin copolymer is also provided which is obtainable by co-polymerizing ethylene, an a-olefin of 3 to 20 carbon atoms and a specific silicon-containing ethylene monomer.

Silicon-containing olefin copolymer, crosslinkable rubber composition thereof, and use thereof

An ethylene copolymer is provided which is a copolymer of ethylene and an &#x3b1;-olefin of 3 to 20 carbon atoms and has the following properties:

Ethylene copolymer and uses thereof

Unconjugated cyclopolyene copolymer, rubber composition, and use

A novel and useful linear triene compound represented by the following formula (1) is co-polymerized with an &agr;-olefin to obtain an ethylenically unsaturated copolymer which is superior in weather-ability, heat resitance and fastness to ozone, together with superior scorch stability and vulcanizability at high velocity

Linear triene compound and copolymer

Growing community of inventors

Sodegaura, Japan

Hidetatsu Murakami