Novel adhesive dispersions

US4997879A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Rudolf Weissgerber · Burghausen, DE
• Klaus Marquardt · Burghausen, DE
• Peter Ball · Emmerting, DE
• Manfred Selig · Burghausen, DE
• Fritz Stallbauer · Burghausen, DE

Key dates

• Filing date: Apr 12, 1988
• Grant date: Mar 5, 1991
• Expiry date: Apr 12, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F210/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Novel pressure-sensitive aqueous adhesive dispersions comprising 40 to 65% by weight, based on the dispersion weight, of a copolymer produced by radical emulsion polymerization of ethylene, vinyl esters of saturated carboxylic acids of 2 to 12 carbon atoms, ethylenically unsaturated carboxylic acids, ethylenically unsaturated hydroxyalkyl functional compounds, optionally present (meth)acrylic acid esters with alkyl of 4 to 12 carbon atoms and optionally present mono- or poly-ethylenically unsaturated compounds having a second order transition temperature of -20.degree. to -60.degree. C. and a K value of 50 to 180, characterized in that the copolymer was obtained by polymerization of PA0 (a) 10-45% by weight of ethylene PA0 (b) 0-25% by weight of acrylic ester(s) PA0 (c) 40-89% by weight of vinyl ester(s) PA0 (d) 0.5-4% by weight of ethylenically unsaturated carboxylic acids PA0 (e) 0.5-10% by weight of ethylenically unsaturated hydroxyalkyl-functional compounds PA0 (f) 0-0.3% (meth)acrylamide PA0 (g) 0-10% ethylenically unsaturated sulfates and sulfonates or polyethylenically unsaturated compounds, in the presence of 1 to 6% by weight, based on the comonomer mixture, of an emulsifi…