Patent ID: 7041843
Filing Date: 2006-05-09
Classification: B60C,C07F

Abstract:
1. A method for preparing a sulfide chain-bearing organosilicon compound, comprising the steps of: premixing a sulfide chain-bearing organosilicon compound having the general formula (1): wherein R 1 and R 2 each are a monovalent hydrocarbon group of 1 to 4 carbon atoms, R 3 is a divalent hydrocarbon group of 1 to 10 carbon atoms, m has an average value of 3 to 4, and p is 0, 1 or 2, with a halogenoalkyl group-bearing organosilicon compound having the general formula (2): wherein R 1 and R 2 each are a monovalent hydrocarbon group of 1 to 4 carbon atoms, R 3 is a divalent hydrocarbon group of 1 to 10 carbon atoms, X is a halogen atom, and p is 0, 1 or 2, and sulfur, adding anhydrous sodium sulfide represented by Na allowing reaction to take place for thereby forming a sulfide chain-bearing organosilicon compound having the general formula (3): wherein R 1 and R 2 each are a monovalent hydrocarbon group of 1 to 4 carbon atoms, R 3 is a divalent hydrocarbon group of 1 to 10 carbon atoms, n has an average value 2 to 3, exclusive of m=n=3, and p is 0, 1 or 2, while minimizing formation of a monosulfide-bearing organosilicon compound with n=1 to a level of at most 1 mol %.