TITANIUM/ZIRCONIUM CATALYSTS AND USE THEREOF FOR PRODUCTION OF ESTERS OR POLYESTERS

摘要

The invention relates to catalysts, produced by reaction of orthoesters or condensed orthoesters of titanium and/or zirconium with one or several polyalcohols. Compounds with at least two hydroxyl groups and a number average molecular weight of at least 180 gmol<-1> are used as the polyol component. The invention further relates to a method for the production of the above catalyst and the use thereof for the production of esters or polyesters with little colouring, which can be used for the production of PUR foams.