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:
Apr. 09, 2002
Filed:
Jan. 07, 1999
Toagosei Co., Ltd., Tokyo, JP;
Abstract
A heat-sensitive adhesive sheet comprising a substrate having formed thereon an adhesive layer comprising a polymer composition (C) which comprises the following aqueous emulsion (A) and copolymer (B), wherein an adhesive force determined by the 180° peeling test method as specified in JIS Z 0237 at a temperature of 25° C. is 10 g/25 mm or less: Aqueous emulsion (A): An aqueous emulsion containing an alkyl (meth)acrylate-based polymer (a) having a glass transition temperature of −10° C. or below, which is obtained by emulsion-polymerizing radically polymerizable monomers containing as the main component an alkyl (meth)acrylate; and Copolymer (B): A water-soluble or water-dispersible copolymer (B) having a glass transition temperature of 20° C. or above, which is a copolymer obtained by copolymerizing an &agr;,&bgr;-ethylenically unsaturated carboxylic acid with other radically polymerizable monomers, wherein a part or the entire amount of carboxyl groups in the copolymer is neutralized with a base having a boiling point of 110° C. or below.