The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 2013
Filed:
Mar. 30, 2009
Takeshi Ooishi, Tokyo, JP;
Ryouji Oda, Tokyo, JP;
Takeshi Ooishi, Tokyo, JP;
Ryouji Oda, Tokyo, JP;
Zeon Corporation, Tokyo, JP;
Abstract
A block copolymer composition comprising an aromatic vinyl-conjugated diene-aromatic vinyl block copolymer having a high-level balance between a high elastic modulus and a small elongation set is provided. The block copolymer composition comprises a block copolymer A represented by formula (A) and a block copolymer B represented by formula (B), where the weight ratio of the block copolymer A to the block copolymer B, A/B, is from 36/64 to 85/15 and the ratio of the aromatic vinyl monomer units relative to all polymer components in the block copolymer composition is 27-70 wt %. Ar1-D-Ar2(A). Ar1-D-Ar2(B). (In the formulae, Ar1, Ar1and Ar2each represent an aromatic vinyl polymer block having a weight-average molecular weight of from 6,000 to 18,000; Ar2represents an aromatic vinyl polymer block having a weight-average molecular weight of from 40,000 to 400,000; Dand Deach represent a conjugated diene polymer block having a vinyl bond content of from 1 to 20% by mol; and Dhas a weight-average molecular weight of from 60,000 to 400,000).