Method for preparing a cyclic isocyanuric ester having organosilicon groups

摘要

A method for preparing a cyclic isocyanuric ester having organosilicon groups which comprises thermally treating an isocyanic ester for addition reaction in the presence of an alkali metal hydroxide or alkoxide. By the above reaction, a cyclic trimer of the starting isocyanic ester can be selectively obtained. The catalyst can be readily removed from the reaction system.