Lintec Corporation

Saiden Chemical Industry Co., Ltd.

Hajime Fukada

Norihisa Miyajima

Issei Ozaki

A pressure sensitive adhesive sheet or label comprising an adhesive coated substrate of paper or synthetic resin film, the adhesive coating containing an acrylic copolymer prepared by copolymerization of 0.1 to 20 weight % of (A) at least one unsaturated monomer of the formula: ##STR1## wherein R is hydrogen or methyl group, R.sup.1 and R.sup.2 are hydrogen or a C.sub.1 -C.sub.4 alkyl, n is 1 to 4; 0.01 to 10 weight % or (B) at least one unsaturated monomer of the formula: ##STR2## wherein Y is an organic group having a radical polymerizable unsaturated bond and R.sup.3, R.sup.4 and R.sup.5 are an aryl, or an unsubstituted or substituted alkyl; 0 to 10 weight % of (C) at least one unsaturated monomer of the formula: ##STR3## wherein R.sup.6 R.sup.7, R.sup.8, R.sup.9 and R.sup.10 are hydrogen or --CH.sub.2 OH; 60 to 99.89 weight % of (D) at least one unsaturated monomer of the formula: ##STR4## wherein R.sup.11 is hydrogen or methyl group and R.sup.12 is a C.sub.1 -C.sub.14 alkyl. A laminate can be prepared by laminating sheets or plastic molded articles with an adhesive coating composition as set forth above.

Pressure sensitive adhesive sheet a pressure sensitive label and a

The pressure sensitive adhesive composition is favorably utilized for lamination of plastic molded articles, particularly molded articles of polycarbonate resins and molded articles of acrylic resins because formation of blisters, such as bubbles and liftings, is prevented. It is favorably utilized for pressure sensitive adhesive sheets for surface protection because increase of adhesive strength is small, staining of the surface of the substrate is prevented and removability is excellent. It is also favorably utilized for electric insulation tapes because corrosion resistance, creep property and solvent resistance are excellent. The pressure sensitive adhesive composition comprises as the main component thereof a specific acrylic copolymer prepared by copolymerization of a specific methyleneamine derivative of acrylamide, a specific amine derivative of acrylimide, a specific diacetone derivative of acrylamide and a specific ester of acrylic acid.

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Urawa, Japan

Hajime Fukada