Patent ID: 7714050

Claim:
A rubber composition comprising (a) a rubber component; (b) from about 5 to about 150 phr of a silica filler; (c) from about 0.5 to about 15 phr of a coupling agent; (d) a combination comprising (i) from about 0.2 to about 10 phr of a polyalkylene oxide, (ii) from about 0.1 to about 5 phr of an aromatic or cycloaliphatic carboxylic acid of about 6 to about 24 carbon atoms, and (iii) from about 0.05 to about 2.0 phr of a nitrogen-containing compound selected from the group consisting of carboxylic acid amides, hydrocarbyl monoamines, hydrocarbyl polyamines wherein the hydrocarbyl group is selected from the group consisting of C 1 -C 50 alkyl groups and olefinic groups containing one or two sites of unsaturation and from about 6 to about 200 carbon atoms, hydroxy substituted hydrocarbyl monoamines, Mannich bases, phosphonoamides, thiophosphonoamides, phosphoroamides, and mixtures thereof; and (e) from about 0.1 to about 1.0 phr of a thiuram disulfide having a molecular weight of from about 500 to about 1250 and wherein the thiuram disulfide is of the general formula wherein R 5 , R 6 , R 7 and R 8 each are the same or different and are hydrocarbons containing from about 8 to about 18 carbon atoms.