Abstract: The present invention provides a process for preparing radiation-curing allophanates having residual monomer contents of less than 0.5% by weight and an NCO content of less than 1% by weight, wherein (A) compounds containing isocyanate groups, (B) hydroxy-functional compounds which contain groups which react, with polymerization, with ethylenically unsaturated compounds on exposure to actinic radiation (radiation-curing groups) and (C) optionally further compounds containing NCO-reactive groups, also optionally in the presence of a catalyst, are used to form NCO-group-containing urethanes having radiation-curing groups, which are subsequently reacted, without further addition of compounds containing isocyanate groups, in the presence of an allophanatization catalyst, the ratio of NCO groups of the compounds from A) to the OH groups of the compounds from B) and, where used, C) being 1.45:1.0 to 1.1:1.0.

Abstract: The present invention relates to polyurethane prepolymer having terminal alkoxysilane and OH groups which is the reaction product of A) a polyurethane prepolymer prepared by incomplete reaction of i) an aromatic, aliphatic or cycloaliphatic diisocyanate component having an NCO content of 20 to 60% by weight with ii) a polyol component comprising a polyoxyalkylene diol having a number average molecular weight of 3000 to 20,000, wherein the reaction is stopped after 50 to 90% of the OH groups of component ii) are reacted and 10 to 50% are unreacted, with B) a compound having alkoxysilane and amino groups, preferably a compound containing alkoxysilane and aspartate groups. The present invention also relates to a process for preparing these polyurethane prepolymers containing terminal alkoxysilane and OH groups and to isocyanate-free, sealants, adhesives, primers and coatings containing these polyurethane prepolymers containing terminal alkoxysilane and OH groups as binders.

Abstract: The present invention relates to thermosetting two-component coating compositions containing A) at least one NCO prepolymer, B) at least one amine-free chain extender, C) at least one catalyst selected from metal 1,3-dicarbonylates and metal-oxo 1,3-dicarbonylates, wherein i) the metal 1,3-dicarbonylate contains as a neutral complex a metal cation with the electron configuration d0 of sub-group 3 or a lanthanide and ii) the metal-oxo 1,3-dicarbonylate contains a metal-oxo cation of sub-group 6 with the electron configuration d0. The present invention also relates to a process for preparing these coating compositions and to coated substrates prepared therefrom.

Abstract: The present invention relates to polyurethane prepolymer having terminal alkoxysilane and OH groups which is the reaction product of

Abstract: The present invention relates to thermosetting two-component coating compositions containing