Trimerization-catalysts, method for their preparation and their use in producing of isocyanate groups containing polyisocyanates.

摘要

Trimerisation catalysts, suitable for heterogeneous catalysis, for organic isocyanates, comprising quaternary ammonium or phosphonium fluorides adsorbed onto selected support materials, a process for the preparation of these catalysts by preparing an alcoholic solution of a quaternary ammonium or phosphonium salt and adsorbing the resultant catalyst solution onto the support material, and the use of the catalysts in the preparation of polyisocyanates containing isocyanurate groups.