Process for preparation of isocyanuratepolyisocyanates, the compounds prepared according to this process, and their use

摘要

A process for the preparation of isocyanuratopolyisocyanates by trimerisation of some of the isocyanate groups of (cyclo)aliphatic diisocyanates in the presence of trimerisation catalysts, termination of the trimerisation reaction at the degree of trimerisation desired in each case and removal of unreacted starting diisocyanate and any further volatile components present, in which at least one monohydric alcohol containing ester groups is added to the reaction mixture at any desired time before removal of the excess starting diisocyanate in an amount of 1 to 30% by weight, relative to the total weight of the diisocyanate used as starting material, and is allowed to react completely with some of the isocyanate groups present with urethane formation, the isocyanuratopolyisocyanates obtained by this process and their use in blocked or unblocked form for the preparation of polyurethane plastics, in particular in two-component polyurethane paints.