PROCESS FOR THE PRODUCTION OF URETDIONE GROUP-CONTAINING COMPOUNDS, THE COMPOUNDS OBTAINED ACCORDING TO THIS PROCESS AND THE USE THEREOFIN THE PRODUCTION OF POLYURETHANE PLASTICSMATERIAL

摘要

A PROCESS FOR THE PRODUCTION OF URETDIONE GROUP CONTAINING COMPOUNDS, THE COMPOUNDS OBTAINED ACCORDING TO THIS PROCESS AND THE USE THEREOF IN THE PRODUCTION OF POLYURETHANE PLASTICS MATERIAL The invention is directed to a process for the production of uretdione group-containing compounds by dimerizing at least a part of the isocyanate groups of organic isocyanates in the presence of compounds containing phosphorus-nitrogen bonds as dimerization catalysts, characterized in that the reaction is carried out in the presence, as co-catalysts, of H-active organic compounds having a pKa-value of at least 6, which have at least one hydrogen atom bound to oxygen, sulphur or nitrogen. The invention also relates to the uretdione group-containing compounds obtained according to this process and to their use for the production of plastics materials according to the isocyanate-polyaddition process.