Patent ID: 7166341

Claim:
A water-soluble or water-dispersible hotmelt adhesive comprising: A) 20 to 80% by weight of at least one component (A), B) 1 to 70% by weight of at least one polymer selected from the group consisting of polyesters, polyurethanes, alkyl poly(meth)acrylates, acrylic acid homopolymers, acrylic acid copolymers and vinyl polymers as component (B), C) 10 to 70% by weight of at least one resin as component (C) that is different from said at least one polymer of component (B), said resin comprising styrene/acrylic acid copolymer, D) 0 to 30% by weight of at least one plasticizer as component (D), E) 0 to 3% by weight of at least one additive as component (E), the sum total of components (A) to (E) being 100% by weight and component (A) being a graft copolymer containing: i) 30 to 90% by weight olefinically unsaturated monomer, wherein said olefinically unsaturated monomer corresponds to one or more monomers selected from (i-a) at least one olefinically unsaturated monomer selected from the group consisting of a) mono- and di-esters of crotonic acid, cinnamic acid, fumaric acid, maleic acid, citraconic acid, and itaconic acid; b) carboxyfunctional monomers; c) N-vinyl caprolactam, vinyl phosphonates, N-vinyl formamides, N-vinyl acetamides, hydroxypropyl acrylates and methacrylates, monoacrylates and monomethacrylates of polyalkylene glycols, acrylates, methacrylates, acrylic acid and methacrylic acid amides containing amine groups; d) vinyl esters corresponding to general formula (I) CH 2 ═CH——O——C(O)——R 1 , with R 1 =C 11-21 , (I) the at least one olefinically unsaturated monomer of group (a), (b), (c) or (d) being present in the graft copolymer in a quantity of up to 50% by weight; or (i-b) a mixture of olefinically unsaturated monomers of vinyl acetate and, based on the graft copolymer, up to 50% by weight of at least one olefinically unsaturated monomer selected from the group consisting of stearyl acrylate, vinyl laurate, vinyl versatate, lauryl acrylate, lauryl methacrylate, dibutyl maleate, dibutyl itaconate, dibutyl fumarate and acrylates and methacrylates corresponding to general formula (II): CH 2 ═CR 2 ——C(O)——O——R 3 with R 2 =H or CH 3 and R 3 =C 12-22 ; (II) or (i-c) at least one monomer selected from the group consisting of vinyl acetate and vinyl propionate; and ii) 10 to 70% by weight of polyalkylene oxide where the ethylene oxide content of the polyalkylene oxide is at least 50% by weight.