HYDROGENATED AROMATIC VINYL COPOLYMER AND MOLDED ARTICLE PRODUCED FROM THE SAME

Title:

HYDROGENATED AROMATIC VINYL COPOLYMER AND MOLDED ARTICLE PRODUCED FROM THE SAME

Document Type and Number:

WIPO Patent Application WO/2006/098388

Kind Code:

A1

Abstract:

Disclosed is a hydrogenated aromatic vinyl copolymer produced by hydrogenating a block copolymer having monomer constituent units comprising an aromatic vinyl monomer and a conjugated diene monomer. The block copolymer comprises (A) 75 to 92% by mass of an constituent unit derived from the aromatic vinyl monomer and (B) 8 to 25% by mass of a constituent unit derived from the conjugated diene monomer ((A) + (B) = 100% by mass), and is a branched block copolymer represented by a specified block structure and having a weight average molecular weight of 100,000 to 300,000. In the hydrogenated aromatic vinyl copolymer, 97% or more of the aromatic rings derived from the aromatic vinyl monomer and 97% or more of the double bonds derived from the conjugated diene monomer in the block copolymer are hydrogenated. The hydrogenated aromatic vinyl copolymer, when molded into an article, exhibits excellent transparency and impact resistance and has a low water absorption property and a low birefringence.

Inventors:

KAWATA TAKASHI (JP)

Application Number:

PCT/JP2006/305174

Publication Date:

September 21, 2006

Filing Date:

March 15, 2006

Export Citation:

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Assignee:

JSR CORP (JP)
KAWATA TAKASHI (JP)

International Classes:

C08F8/04; C08F297/04

Foreign References:

JP2001163934A	2001-06-19
JPH05155917A	1993-06-22
JPH07118336A	1995-05-09

Other References: