Patent ID: 7429629

Claim:
A golf ball comprising a core and a cover, wherein at least a portion of the golf ball is cast from a composition comprising the reaction product of: a prepolymer comprising the reaction product of: a first prepolymer and a functionalized block copolymer, wherein the prepolymer is capped by isocyanate end groups, and wherein the functionalized block copolymer comprises a hydrophobic Ax-By block or A x -B y -A z block, wherein A comprises an olefin or an acrylate, B comprises a diene, and x, y, and z are independently 1 or greater; and a curing agent, wherein the first prepolymer consists essentially of the following linkages: wherein x is about 1 or greater, and R and R 1 comprise a straight chain or branched hydrocarbon chain having about 1 to about 20 carbons.