Synthesis of Triisocyanatosilane in a Mixed Solvent System of Acetonitrile and Benzene

Abstract

Synthesis of triisocyanatosilane (TIS) in a mixed solvent system of acetonitrile and benzene was investigated. The yield of TIS varied depending on the composition of the solvents. The reaction did not proceed in benzene, while it proceeded when acetonitrile was added to benzene. When 3 vol% of acetonitrile was added to benzene, TIS was isolated in 70% yield without any by-products. Tetraisocyanatosilane was a by-product when a great amount of sodium isocyanate or acetonitrile was used at higher termperature.