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:
Sep. 23, 1997
Filed:
Dec. 15, 1995
Katsuaki Yoshizawa, Amagasaki, JP;
Akira Kunihiro, Amagasaki, JP;
New Oji Paper Co., Ltd., Tokyo, JP;
Abstract
Disclosed is a removable adhesive sheet comprising a release liner, an adhesive layer and a surface stock as laminated, wherein the adhesive layer being formed by applying an adhesive to the release liner or to the surface stock, followed by drying, said adhesive comprising (i) an aqueous emulsion of a copolymer obtained by emulsion polymerization and (ii) a polyglycidyl compound having two or more epoxy groups within the molecule thereof, said copolymer comprising (a) 80-99% by weight of a (meth)acrylic acid C.sub.8 -C.sub.12 alkyl ester, (b) 0.3-10% by weight of (meth)acrylonitrile, (c) 0.1-5% by weight of an .alpha.,.beta.-unsaturated carboxylic acid and (d) 0-5% by weight of another copolymerizable monomer, said copolymer having a Mn of not less than 0.1.times.10.sup.4 but less than 5.0.times.10.sup.4, ratio of (Mw/Mn) of 40-800, an average particle size of 100-500 nm and a Tg of not higher than -50.degree. C., and said polyglycidyl compound being used in an amount such that the epoxy groups amount to 0.5 to 2 equivalents relative to the carboxyl groups in said copolymer.