Patent ID: 6452003
Filing Date: 2002-09-17
Classification: C08G

Abstract:
A process, comprising:partially trimerizing isophorone diisoyanate at a temperature reaching at least 140Â° to 167Â° C. in the presence of a catalyst, said catalyst consisting of a compound having the formula: (Râ€”NX3)âŠ•Y&ominus;wherein R and X are butyl groups and Yâ€” is CH3COOâ€”; or wherein R is a benzyl group, Yâ€” is a carboxylate anion having from 4 to 8 carbon atoms and each X is an alkylene group having from 2 to 3 carbon atoms, wherein said three alkylene groups share a common carbon atom and, together with the N atom in the formula, form a bridged tricyclic structure, and wherein at least one alkyene group has at least one OH group in an &agr; or &bgr; or &ggr; position relative to the N atom, to obtain a monomer-containing polyisocyanurate mixture.