Patent ID: 6777474
Filing Date: 2004-08-17
Classification: C07F

Abstract:
A method for preparing a sulfide chain-bearing organosilicon compound having the following general formula (3):(R1O)(3âˆ’p)(R2)pSiâ€”R3â€”Snâ€”R3â€”Si(OR1)(3âˆ’p)(R2)pâ€ƒâ€ƒ(3) wherein R1 and R2 each are a monovalent hydrocarbon group having 1 to 4 carbon atoms, R3 is a divalent hydrocarbon group having 1 to 10 carbon atoms, n has an average value of 2&lE;n<6, and p is 0, 1 or 2, said method comprising the step of reactinga sulfide chain-bearing organosilicon compound having the following general formula (1): (R1O)(3âˆ’p)(R2)pSiâ€”R3â€”Smâ€”R3â€”Si(OR1)(3âˆ’p)(R2)pâ€ƒâ€ƒ(1) wherein R1, R2, R3 and p are as defined above, and m has an average value of 2n,an alkali metal or alkaline earth metal, a halogenoalkyl group-bearing organosilicon compound having the following general formula (2): (R1O)(3âˆ’p)(R2)pSiâ€”R3â€”Xâ€ƒâ€ƒ(2) wherein R1, R2, R3 and p are as defined above, and X is a halogen atom, andoptionally, sulfur.