Graft copolymer pressure-sensitive adhesives, their manufacture

Details Graft copolymer pressure-sensitive adhesives, their manufacture Graft copolymer pressure-sensitive adhesives, their manufacture

1980-01-18

1981-10-20

Levin, Stanford M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 316, 260 328N, 428355, 428442, 428451, 428463, 428518, 525 57, 525 59, 525279, C08F26104, C08F26302, C08F26304, C08L 3906

Patent

active

042960177

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.

REFERENCES:
patent: 3911053 (1975-10-01), Wiest et al.

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