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:
Oct. 18, 2011
Filed:
Aug. 05, 2004
Masahiro Fujiwara, Kawasaki, JP;
Yukinori Nakamichi, Oita, JP;
Masahiro Fujiwara, Kawasaki, JP;
Yukinori Nakamichi, Oita, JP;
Japan Elastomer Co., Ltd., Tokyo, JP;
Abstract
The present invention relates to an adhesive composition comprising (A) a block copolymer composition comprising a block copolymer (a) formed from at least two polymer blocks composed mainly of a monoalkenyl aromatic compound and at least one polymer block composed mainly of a conjugated diene compound and a block copolymer (b) formed from a polymer block composed mainly of a monoalkenyl aromatic compound and a polymer block composed mainly of a conjugated diene compound, wherein the block copolymer (a) has a GPC peak molecular weight of 60,000 to 110,000 in terms of standard polystyrene, the polymer block composed mainly of a monoalkenyl aromatic compound has a peak molecular weight of 10,000 to 30,000 and a molecular weight distribution Mw/Mn of 1.0 to 1.6, the block copolymer composition (A) has a content of the block copolymer (b) of 50 to 90% by weight, the block copolymer composition (A) has a total monoalkenyl aromatic compound content of more than 40% by weight and 50% by weight or less, the conjugated diene unit has a vinyl bond content of less than 20%, and the block copolymer composition (A) has a viscosity in a 15% toluene solution of 10 to 40 cP at 25° C.