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US 9,315,654 B1Granted
Preparation of silica reinforced rubber with coupling agent comprised of siloxy trithiocarbonate and tire with component
AssigneeThe Goodyear Tire & Rubber Company
InventorsLeena Nebhani, Tang Hong Wong
Life of this patent
Estimating the term…
Abstract
The present invention relates to preparation of precipitated silica reinforced rubber compositions with silica coupling agent comprised of a siloxy trithiocarbonate, rubber compositions thereof and an article of manufacture such as a tire which contains a component comprised of such rubber composition.
Claims16
A rubber composition comprised of a blend of:
- (A) at least one diene-based elastomer comprised of at least one of cis 1,4-polyisoprene, polybutadiene, isoprene/butadiene, styrene/isoprene, styrene/butadiene and styrene/isoprene/butadiene elastomers exclusive of copolymers of isobutylene and diene hydrocarbon,
- (B) from about 30 to about 160 phr of a combination of rubber reinforcing carbon black and precipitated silica comprised of from about 10 to about 150 phr of said precipitated silica, and
- (C) a blocked silica coupler comprised of a siloxy trithiocarbonate of the general Formula (I):
- where R1, R2 and R3 are independently selected alkyl or alkoxy groups containing from 1 through 8 carbon atoms provided that at least one of said groups is an ethoxy group, R4 is an alkyl group containing from 1 through 8 carbon atoms, R5 is an alkyl, aryl, alkylaryl or arylalkyl group, Si is silicon and S is sulfur, and
- (D) at least one aliphatic primary amine.
2 more elements
A method for preparation of a rubber composition which comprises blending:
- (A) at least one diene-based elastomer comprised of at least one of cis 1,4-polyisoprene, polybutadiene, isoprene/butadiene, styrene/isoprene, styrene/butadiene and styrene/isoprene/butadiene elastomers exclusive of copolymers of isobutylene and diene hydrocarbon,
- (B) from about 30 to about 160 phr of a combination of rubber reinforcing carbon black and precipitated silica comprised of from about 100 to about 150 phr of said precipitated silica, and
- (C) a blocked silica coupler comprised of a siloxy trithiocarbonate of the general Formula (I):
- where R1, R2 and R3 are independently selected alkyl or alkoxy groups containing from 1 through 8 carbon atoms provided that at least one of said groups is an ethoxy group, R4 is an alkyl group containing from 1 through 8 carbon atoms, R5 is an alkyl, aryl, alkylaryl or arylalkyl group, Si is silicon and S is sulfur, and
- (D) an aliphatic primary amine.
2 more elements
Dependencies are inferred from the claim text.