C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/1700, 400/18
C08F 255/00 (2006.01) C08F 255/02 (2006.01) C08F 263/04 (2006.01) C08L 51/06 (2006.01) C09J 151/00 (2006.01) C09J 151/06 (2006.01)
Patent
CA 1130948
ABSTRACT OF THE DISCLOSURE The invention relates to pressure-sensitive adhesive 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 for use as polymeric pressure-sensitive adhesive 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 consists 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 car- boxylic 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 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 copolymer- izable monomer units. These graft copolymers are manufac- tured by free-radical-initiated grafting of a solution of the copolymers in a monomer mixture. The pressure-sensitive adhesives according to the invention can be used in par- ticular as hot melt pressure-sensitive adhesives.
344065
Eichelseder Christine
Kandler Herbert
Nunner Hans-Herbert
Pangerl Helmut
Stoll Alois
Macrae & Co.
Wacker-Chemie Gmbh
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