Patent ID: 6812361
Filing Date: 2004-11-02
Classification: C07F

Abstract:
A process for preparing isocyanatoorganosilanes of the formula 1R2R3R4Siâ€”R1â€”N&boxH;C&boxH;Oâ€ƒâ€ƒ(1), comprising heating gaseous carbamatoorganosilane of the formula 2R2R3R4Siâ€”R1â€”NHâ€”COâ€”ORâ€ƒâ€ƒ(2), whereR is a monovalent C1-C10-alkyl radical, R1 is a divalent C1-C6 hydrocarbon radical and R2, R3 and R4 are independently methyl, ethyl, n-propyl, isopropyl, methoxy, ethoxy, n-propoxy or isopropoxy radicals, at a temperature of 300Â° C. to 1000Â° C. in the presence of a heterogeneous catalyst.