Use of aqueous dispersions as heat-seal adhesives

US5385967A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerhard Bauer · Düsseldorf, DE
• Karl-Heinz Schumacher · Ludwigshafen, DE
• Hans-Joachim Fricke · Dirmstein, DE
• Eckehardt Wistuba · Bad Dürkheim, DE
• Hans J. Neumann · Oberkochen, DE

Key dates

• Filing date: Jun 4, 1993
• Grant date: Jan 31, 1995
• Expiry date: Jun 4, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J2301/304
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An aqueous dispersion containing from 5 to 80% by weight of a copolymer A) having a glass transition temperature of from 50 to 150.degree. C. and from 95 to 20% by weight of a copolymer B) having a glass transition temperature of from -50.degree. to +50.degree. C., the glass transition temperatures of the two copolymers differing by at least 20.degree. C. at least one of the two copolymers containing from 3 to 70% by weight, based on the particular copolymer, of an ethylenically unsaturated C.sub.3 -C.sub.5 -mono- or dicarboxylic acid or of the anhydride thereof and the stated weights of the copolymers A) and B) being based on the sum of A) and B), is used as a sealable coating.