Patent ID: 8241146

Claim:
A golf ball comprising: a core; a casing layer disposed about the core, wherein the casing layer comprises a blend comprising: a high acid ionomer comprising greater than about 16 percent acid groups by weight of the high acid ionomer, wherein between about 25 percent and about 70 percent of the acid groups are neutralized with a metal cation, a metallocene catalyzed polymer comprising at least one grafted moiety; and an unneutralized acid copolymer comprising about 17 percent to about 30 percent acid groups by weight of the unneutralized acid copolymer; and a cover having a hardness of about 30 to about 55 Shore D and comprising a composition formed from a polyurethane prepolymer and a hydroxy-terminated curing agent, wherein the polyurethane prepolymer comprises the reaction product of an isocyanate and a hydroxy-terminated component.