Patent ID: 7091269

Claim:
A golf ball comprising a core and a cover of one or more layers enclosing the core, wherein at least one layer which constitutes said cover is formed primarily of a mixture comprising (A) an ionomer resin composition, (B) a thermoplastic elastomer selected from a thermoplastic polyester elastomer, thermoplastic block copolymer and thermoplastic polyurethane, and (C) a thermoplastic block copolymer terminated with a functional group capable of reacting with the ionomer resin, in such a proportion as to provide a A/(B+C) weight ratio between 50/50 and 98/2 and a B/C weight ratio between 9/1 and 1/1, wherein the functional group of the thermoplastic block copolymer (C) is selected from the group consisting of amino, acid anhydride and epoxy groups, and wherein the thermoplastic elastomer (B) has no functional groups capable of reacting with ionomer resins.