Kaneka Corporation

Kanegafuchi Kagaku Kogyo Kabushiki Kaisha

Naoki Furukawa

Shigeru Hagimori

Yoshiki Nakagawa

Nao Fujita

Kosuke Tanaka

Akihisa Hirota

Masanao Takeda

Kenichi Kitano

Shigeki Ono

Yoshikuni Deguchi

Shun Wachi

Yoshimichi Yamanaka

Kouji Noda

Chiho Yoshimi

Masakazu Isurugi

Yosuke Asai

Hiromu Terazawa

Keizo Hayashi

The present invention provides: a process for preparing a vinyl polymer containing a halogen in an amount of 1,000 mg or less per kilogram, in which a vinyl polymer containing the halogen produced by atom transfer radical polymerization of a vinyl monomer is heated at a temperature in the range of 140 to 250&#xb0; C. to dehalogenate the vinyl polymer; a vinyl polymer obtained by the process; and a hydrosilylation-reactive curable composition containing the vinyl polymer.

Process for producing vinyl polymer, vinyl polymer, and curable composition

The present invention provides a method for producing a vinyl polymer including the steps of polymerizing a vinyl monomer by atom transfer radical polymerization with a transition metal complex as a polymerization catalyst, and bringing the resultant vinyl polymer into contact with an adsorbent in the presence of an oxidizing agent; the vinyl polymer produced by the method; and a reactive composition susceptible to hydrosilylation containing the vinyl polymer produced by the method and having at least one alkenyl group per molecule.

Process for producing vinyl polymer

A polymer is produced by feeding a polymerization initiator, a cationically polymerizable monomer component and a catalyst continuously to a flow-through stirring vessel reactor to thereby allow the living polymerization to initiate and feeding a reaction solution from said flow-through stirring vessel reactor to a flow-through tubular reactor continuously to thereby allow the living polymerization to proceed, said reaction solution having a conversion rate of said cationically polymerizable monomer component of not less than 1% by weight to less than 90% by weight.

Method of continuous cationic living polymerization

The present invention has for its object to produce an isobutylene polymer having excellent performance characteristics by suppressing side reactions at the polymer growth termini during polymerization. The process of the present invention is to carry out a cationic polymerization of a monomer component containing isobutylene in the presence of a polymerization initiator, a catalyst, an ether compound, and an electron donor. Moreover, the process is to carry out a cationic polymerization of a monomer component containing isobutylene in the presence of a polymerization initiator, a catalyst, an ether compound, and an electron donor, and add a compound having the carbon-carbon unsaturated bond for introducing the carbon-carbon unsaturated bond into the polymer terminus.

Process for producing isobutylene polymers

Processes for producing polymers having functional groups

A method of preparing a polymer containing functional groups by reacting a polymer (A) having alkenyl groups with less than 1/N mole ratio with respect to the mole number of the alkenyl group of a silicon polyhydride compound (B) having 2 to 6 hydrogen-silicon bonds in one molecule, so as to increase the molecular weight and leaving unreacted alkenyl groups remain in molecules, or if desired, by adding the silane compound (C) in the reaction system so as to react the silane compound with the remaining alkenyl group in one-point process.

Method of preparing polymer containing functional group

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Settsu, Japan

Naoki Furukawa