| abstract |
The present invention is a polyisocyanate mixture based on tolylene diisocyanate and comprising at least one polyisocyanurate having isocyanate groups and at least one polyurethane based on tolylene diisocyanate and having isocyanate groups, A) a solid content of? 51 to? 90 wt.%, Based on the total weight of the polyisocyanate mixture, and b) a content of monomeric tolylene diisocyanate of? 0.9 wt.%, Based on the total weight of the polyisocyanate mixture, Polyisocyanurates based on rylene diisocyanate and having isocyanate groups are based on tolylene diisocyanate and have a polydispersity degree D of? 1 to? 1.5, based on the total weight of polyisocyanurates having isocyanate groups , Wherein the polydispersity D is the ratio of the weight average molecular weight and the number average molecular weight of the polyisocyanurate and the weight average molecular weight and the number average molecular weight are in each case determined according to DIN 55672-1: 2016-03 as polystyrene standards and tetra ≪ / RTI > is determined by gel permeation chromatography using < RTI ID = 0.0 > hydrofuran. ≪ / RTI > |