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:
May. 08, 2018
Filed:
Dec. 26, 2014
Zeon Corporation, Chiyoda-ku, Tokyo, JP;
Ryoji Oda, Tokyo, JP;
Yuta Ishii, Tokyo, JP;
ZEON CORPORATION, Chiyoda-ku, Tokyo, JP;
Abstract
The present invention provides a block copolymer composition comprising a block copolymer A represented by formula (A) and a block copolymer B represented by formula (B), the block copolymer composition having a water content of 200 ppm by weight or less when the block copolymer composition has been formed in a shape of pellets, dried, and allowed to stand at a temperature of 37° C. and a relative humidity of 70% for 24 hours. In the formulas, Ar1, Ar1, and Ar2are aromatic vinyl polymer blocks having a weight average molecular weight of 6,000-18,000, Ar2is an aromatic vinyl polymer block having a weight average molecular weight of 40,000-400,000, and Dand Dare specific conjugated diene polymer blocks. The block copolymer composition has a high modulus of elasticity, exhibits low tension set, and ensures that the formation of a hole is prevented when a film is formed by melt-forming the block copolymer composition.Ar1-D-Ar2  (A)Ar1-D-Ar2  (B)