A method for the production of toluylene diisocyanate - based isocyanurate - poly isocyanate solutions

摘要

A method for the production of toluylene diisocyanate - based isocyanurate - poly isocyanate solutions, in the case of theA) in a solvent, which contains exclusively isomers diisononyl phthalatesB) isomer mixture of toluene diisocyanate with & 35 w -% 2,6 - toluylene diisocyanateC) in the presence of a catalyst, the at least one nitrogen base of the type of a mannich base contains,D) and in the absence of aliphatic hydroxyl - and / or compounds containing urethane groupsas long as in the case of 40 to 140°C. are an allophanate, until the content of free not trimerized tdi - residual monomers ≦ 0,2 w -% and, at the same time, the viscosity at 23°C. is 20 000 mpas, and the solids content based on the contained isocyanurate - polyisocyanate 25 w -% is.