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:
Oct. 20, 1981
Filed:
Jan. 18, 1980
Rudolf Weissgerber, Burghausen, DE;
Alois Stoll, Burghausen, DE;
Herbert Kandler, Burghausen, DE;
Hans-Herbert Nunner, Burghausen, DE;
Christine Eichelseder, Burghausen, DE;
Helmut Pangeri, Burghausen, DE;
Wacker-Chemie GmbH, Munich, DE;
Abstract
Pressure-sensitive adhesives which contain preferably from 60% to 85% by weight of graft copolymers for use as polymeric pressure-sensitive adhesives, and from 15% to 40% by weight of plasticizers such as phthalate or phosphate plasticizers. The graft copolymer consists of from 5% to 30% by weight of a graft base and from 70% to 95% by weight of grafted-on monomer units. The graft base is a copolymer with from 40% to 85% by weight of ethylene units and from 15% to 60% by weight of vinyl acetate units and optionally up to 10% by weight of monomer units of other unsaturated compounds. It may be replaced wholly or partially by other graft bases. The grafted-on monomer units consist of from 30% to 80% by weight of units of vinyl esters of short-chained carboxylic acids, especially vinyl acetate, from 20% to 70% by weight of units of vinyl esters of relatively long-chained carboxylic acids, for example vinyl laurate, and/or units of esters of .alpha.,.beta.-unsaturated carboxylic acids with relatively long-chained alcohols and/or units of esters of unsaturated dicarboxylic acids with relatively long-chained alcohols, from 0.5% to 15% by weight of N-vinyl-2-pyrrolidone units and from 0 to 20% by weight of other olefinically-unsaturated copolymerizable monomer units.