Process for obtaining compounds containing isocyanuric groups by catalytic cyclotrimerization of isocyanates by means of compounds having aminosilyl groups, isocyanurates obtained by elaborating the process.

摘要

Monomeric or polymeric isocyanurates, e.g., polyisocyanate/polyisocyanurates, are prepared by catalytically cyclotrimerizing an isocyanate, e.g., an aliphatic or cycloaliphatic isocyanate, in the presence of an aminosilyl catalysis initiator, e.g., a mono- or diaminosilane, a silylurea or a silazane, having the structural formula: R(4-n)Si-NR'R'']n (I) wherein R is a saturated or unsaturated, aliphatic, cycloaliphatic, aryl, aralkyl or alkylaryl monovalent hydrocarbon radical, or halo or cyano substituted such radical, and further wherein any two radicals R may together form a single divalent such hydrocarbon radical R' is R, SiR3 or an amido radical having the structural formula: IMAGE wherein R''' is R or SiR3, with R being as above defined, and further wherein R', when R' is neither the amido radical nor SiR3, may, together with the radical R'', form a single divalent such radical R'' is R, or a hydrogen atom when R' is not the amido radical and n is either 1 or 2, but when n is 2, R' is R.