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:
Aug. 13, 2002
Filed:
Dec. 07, 1999
Michiharu Yamamoto, Osaka, JP;
Yutaka Moroishi, Osaka, JP;
Kenichi Okada, Osaka, JP;
Fumiko Kamifuji, Osaka, JP;
Tomoko Doi, Osaka, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
A pressure-sensitive adhesive composition having well-balanced pressure-sensitive adhesive force and cohesive force without causing any safety or economy problems, a process for the preparation of the same and pressure-sensitive adhesive sheets using the same are disclosed. The pressure-sensitive adhesive composition comprises a crosslinked polymer obtained by crosslinking a block copolymer comprising at least two of a styrene-based polymer block A and an acrylic polymer block B having a structural unit represented by the general formula (1):—[CH ═C(R )COOR ]— wherein R represents a hydrogen atom or methyl group, and R represents a C alkyl group, bonded each other, such as A-B or B-A type block copolymer and A-B-A type block copolymer.