Stock material or miscellaneous articles – Layer or component removable to expose adhesive
Patent
1995-12-15
1997-09-23
Thomas, Alexander
Stock material or miscellaneous articles
Layer or component removable to expose adhesive
283 81, B32B 706, B32B 712
Patent
active
056702264
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.
Kunihiro Akira
Yoshizawa Katsuaki
New Oji Paper Co. Ltd.
Thomas Alexander
LandOfFree
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