Sulfur-containing organosilicon compound, making method, rubber compounding ingredient, and rubber composition

摘要

A sulfur-containing organosilicon compound having a hydrolyzable silyl group, sulfide group and amide group is shelf stable and useful as a rubber compounding ingredient. When compounded in a rubber composition, the organosilicon compound is effective for significantly reducing the hysteresis loss and improving the abrasion resistance of the rubber composition.

主权项

1. A sulfur-containing organosilicon compound obtained from transesterification reaction of a sulfide-containing organosilicon compound with an amide compound,
said sulfide-containing organosilicon compound having the formula (1):
(R1O)(3-p)(R2)pSi—R3—Sn—R3—Si(OR1)(3-p)(R2)p  (1)wherein R1 and R2 are each independently a monovalent hydrocarbon group of 1 to 4 carbon atoms, R3 is a divalent hydrocarbon group of 1 to 10 carbon atoms, n is a number having an average value in the range of 2≦n≦6, and p is an integer of 0 to 2,
said amide compound having the formula (2):wherein R4 is a monovalent hydrocarbon group of 1 to 20 carbon atoms, R5 is a group of the formula (3), and R6 is hydrogen, an alkyl group of 1 to 12 carbon atoms, an aryl group of 6 to 12 carbon atoms or a group of the formula (3):
*—(CH2)s—R7—OH  (3)wherein R7 is an alkylene group of 1 to 12 carbon atoms or *—O—(Y—O)m—Y—*, Y is an alkylene group of 1 to 10 carbon atoms, m is a number of 1 to 40, and s is a number of 0 to 12, and * designates a bonding site.