| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to the use of specific catalysts for the production of polyisocyanate polyaddition products, in particular for the coatings sector. Described a polyisocyanate polyaddition product, obtained from a) at least one aliphatic, cycloaliphatic, araliphatic and/or aromatic polyisocyanate; b) at least one NCO-reactive compound; c) at least one thermolatent inorganic tin-containing catalyst; d) optionally further catalysts and/or activators other than c); e) optionally fillers, pigments, additives, thickeners, antifoams and/or other auxiliary substances and additives, wherein the ratio of the weight of the tin from component c) and the weight of component a) is less than 3000 ppm when component a) is an aliphatic polyisocyanate and less than 95 ppm when component a) is an aromatic polyisocyanate, wherein the thermolatent inorganic tin-containing catalyst comprises compounds of formula,or.Also described a process for the production of the polyisocyanate polyaddition products, a coating composition comprising the polyisocyanate polyaddition product and a coating obtained from the coating composition.EFFECT: systems with which it is possible to produce coatings based on polyisocyanate polyaddition products, which, on preparation of the 2K mixture, have an open time which is reduced only slightly, but, after application to the substrate, cure in an accelerated manner as a result of a temperature increase and yield a coating which has the high level of qualities known for polyurethane systems.13 cl, 15 ex, 2 tbl |
