Patent ID: 8217103

Claim:
A chain end modified elastomeric polymer, comprising the reaction product of: i) a living anionic elastomeric polymer, and ii) a silane-sulfide modifier represented by the formula: (RO) x (R) y Si—R′—S—SiR 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; 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 living anionic elastomeric polymer has a substantial amount of polymer chain ends that are not terminated prior to reaction with the modifier.