| abstract |
(A) 60 to 95% by weight of structural units derived from an aliphatic starting product and (a2) 5 to 40% by weight of structural units derived from an aromatic starting product, based on the polyester (A). At least one hydroxyl group-terminated polyester having a number average molecular weight of 500 to 4000 Daltons containing (B) a statistical average of more than 1.5 and less than 3 free isocyanate groups in the molecule Reaction with at least one partially blocked polyisocyanate gives an isocyanate-terminated polyurethane-prepolymer, wherein the free isocyanate groups in the polyisocyanate (B) versus the hydroxyl groups in the polyester (A) The equivalence ratio of the In self-crosslinkable branched polyurethanes produced by reacting with compounds having anate-reactive functional groups to extend and / or block chain lengths, their production methods, coating materials, adhesives and sealants Use as a binder. |