Patent ID: 8569409

Claim:
A vulcanized elastomeric composition, comprising: a. a polymer reaction product, comprising the reaction of: i) an anionic elastomeric polymer selected from the group consisting of polybutadiene and butadiene-styrene, and ii) a silane-sulfide modifier represented by the formula: (RO) x (R) y Si—R′—S—Si R 3 wherein: Si is silicon; S is sulfur; O is oxygen; x is an integer selected from 1, 2 and 3; y is an integer selected from 0, 1, and 2; x+y=3; and R is the same or different and is (C 1 -C 16 ) alkyl; and R′ is aryl, and alkyl aryl, or (C 1 -C 16 ) alkyl; and wherein the polymer reaction product has 1. a Mooney viscosity value in the range from 30 to 100; and 2. a molecular weight distribution, represented by the ratio of the weight average molecular weight to the number average molecular weight (Mw/Mn) in the range from 1.3 to 3.0; wherein the anionic elastomeric polymer has a plurality of polymer chain ends that are not terminated prior to reaction with the modifier; b. a filler as a reinforcing agent; and c. a second elastomeric polymer different from the polymer reaction product; wherein the polymer reaction product comprises at least 30 weight percent of a total amount of the polymer reaction product and the second elastomeric polymer.