| abstract |
A two-component polyurethane composition consisting of: -- component A, comprising a) a blend of at least one polyether polyol and at least one polyester polyol, the polyether polyol and polyester polyol each independently having a weight number-average molecular weight of 300 to 3,500 g/mol, b) at least one polyol having 2 to 4 hydroxyl groups per molecule and a number-average molecular weight of less than 200 g/mol, c) at least one polyamine having a number average molecular weight of 200 to 600 g/mol, and d) at least one catalyst selected from Sn-containing catalysts and Bi-containing catalysts; and -- component B, comprising an NCO-terminated prepolymer prepared from the reaction of e) at least one polyether polyol having a number average molecular weight of 300 to 3,500 g/mol, and f) at least one polyisocyanate, wherein the NCO content of the prepolymer is 4 to 13% by weight, based on the total weight of component B. |