Patent ID: 8916641

Claim:
An adhesive, comprising: (A) a first aqueous component comprising at least one first polymer and at least one different second polymer, (A1) wherein the first polymer is at least one polymer selected from the group consisting of a polyurethane capable of forming at least one crystalline domain, synthesized from a mixture comprising: a) at least one diisocyanate; b) at least one polyester diol having a molar weight above 500 g/mol but no more than 5000 g/mol; c) at least one diol comprising at least one carboxylic acid group; and, d) optionally, at least one further monofunctional or polyfunctional compound, different than compounds a)-c), comprising at least one reactive group selected from the group consisting of an alcoholic hydroxyl group, a primary amino group, a secondary amino group, and an isocyanate group, and a copolymer of ethylene and vinyl acetate, (A2) wherein the second polymer is an amorphous polyurethane comprising at least one unit derived from a polyether diol, and wherein at least one of the first and second polymers comprises at least one carboxyl group, and a quantitative weight ratio of the first polymer (A1) to the second polymer (A2) is from 2:8 to 8:2, and (B) a second component comprising at least one silane compound that is reactive toward a carboxyl group.