초록 ▼

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 o

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 ab

대표청구항 ▼

A graft copolymer for use as a polymeric pressure-sensitive adhesive consisting of (I) from 5% to 30% by weight of a graft base soluble in the monomer component selected from the group consisting of (i) a copolymer of 40% to 85% by weight of said copolymer of ethylene units, 15% to 60% by weight of

A graft copolymer for use as a polymeric pressure-sensitive adhesive consisting of (I) from 5% to 30% by weight of a graft base soluble in the monomer component selected from the group consisting of (i) a copolymer of 40% to 85% by weight of said copolymer of ethylene units, 15% to 60% by weight of said copolymer of vinyl acetate units and 0 to 10% by weight of said copolymer of monomer units copolymerizable with ethylene and vinyl acetate, (ii) said copolymer with up to 10% by weight of said copolymer of vinyl alcohol units derived from vinyl acetate units, and (iii) mixtures of 25% to 99.9% by weight of said copolymer with from 0.1% to 75% by weight of other graftable polymers soluble in the monomer component, and (II) from 70% to 95% by weight of a monomer mixture grafted to said graft base consisting of (a) from 30% to 80% by weight of said mixture of vinyl esters of alkanoic acids having 2 to 4 carbon atoms, (b) from 20% to 70% by weight of said mixture of monomers selected from the group consisting of vinyl esters of alkanoic acids having 6 to 18 carbon atoms, esters of ab3 to 8 carbon atoms, with alkanols having 3 to 18 carbon atoms, esters of alkenedioic acids having 4 to 8 carbon atoms, with alkanols having 3 to 18 carbon atoms, and mixtures thereof, (c) from 0.5% to 15% by weight of said mixture, of N-vinyl-2-pyrrolidone, (d) from 0 to 20% by weight of other olefinically-unsaturated compounds copolymerizable with said components (a), (b) and (c), and (e) from 0 to 25% by weight of a plasticizer.