Patent ID: 6946538

Claim:
A method for the (cyclo)condensation of an isocyanate functional group comprising using a saline compound as a catalyst, said saline compound is selected from the group consisting of substituents having the formula: where (M n+ ) 1/n represents the cocation(s) necessary for the electrical neutrality of said saline compound balancing the anion of formula (1): where Y − is selected from: a negatively charged oxygen; and a carbonaceous radical comprising a negative charge carried by an atom from Group VB or by an oxygen, and for which the bond with the silicon of the above formula (I) is carried by an atom from Group VB; where R 1 , R 2 and R 3 , which are identical or different, represent a monovalent hydrocarbonaceous group advantageously having from 1 to 30 carbon atoms which is optionally substituted by one or more halogen atoms or CN or ester groups and/or is optionally interrupted by one or more atoms selected from O, N and Si; and from the salts for which the anionic compound(s) (carrying a negative charge) carry a trialkylsilyl group and result(s) from the reaction of said compounds of formula (I) and of an isocyanate functional group.