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Title:
環状共役ジエン系共重合体
Document Type and Number:
Japanese Patent JP4197493
Kind Code:
B2
Abstract:
A cyclic conjugated diene copolymer comprising a main chain comprised of (A) cyclic conjugated diene monomer units, (B) monomer units obtained from vinyl aromatic monomers each having a hydrogen atom at the alpha-position thereof, and optionally (C) monomer units obtained from commoners which are other than the monomers used for obtaining the monomer units A and B and which are copolymerizable with at least one of the monomers used for obtaining the monomer units A and B, wherein all monomer units A and the monomer units B together form one or more polymer chains each having an A/B random sequence, wherein the one or more polymer chains each having an A/B random sequence contain at least one polymer chain having a number average molecular weight of from 20,000 to 500,000 and contain no polymer chain having a number average molecular weight of more than 500,000. A process for producing the above-mentioned cyclic conjugated diene copolymer by living anionic polymerization.

Inventors:
Junichi Shishido
Kenichi
Application Number:
JP2003521689A
Publication Date:
December 17, 2008
Filing Date:
August 16, 2002
Export Citation:
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Assignee:
ASAHI KASEI KABUSHIKI KAISHA
International Classes:
C08F232/06; C08C19/02; C08F8/00; C08F8/04; C08F8/08; C08F8/42; C08F212/08; C08F232/00; C08F236/04; C08F236/10; C08F287/00; C08F297/04; C08L51/00; C08L53/02
Domestic Patent References:
JP200247311A
JP200247310A
JP2001294724A
JP2001226503A
JP11349638A
JP11189614A
Foreign References:
WO1994028038A1