Patent ID: 7238737

Claim:
A golf ball comprising a thermoplastic composition, said thermoplastic composition comprising: (i) at least one E/X/Y copolymer wherein E represents copolymerized residues of ethylene, X represents copolymerized residues of a C 3 to C 8 α,β-ethylenically unsaturated carboxylic acid, and Y represents copolymerized residues of a softening comonomer selected from alkyl acrylate and alkyl methacrylate, wherein the alkyl groups have from one to eight carbon atoms, wherein the amount of X is from about 2 to about 30 weight % of the E/X/Y copolymer, wherein the amount of Y is from 0 to about 40 weight % of the E/X/Y copolymer, and wherein the carboxylic acid functionalities are at least partially neutralized by one or more alkali metal, transition metal, or alkaline earth metal cations; and (ii) at least one rosin salt; (iii) optionally, one or more organic acids, one or more salts of organic acids, or both an organic acid and a salt of an organic acid, provided that said one or more organic acids and one or more salts of organic acids do not comprise rosin acids or salts of rosin acids; and (iv) optionally, one or more additives selected from the group consisting of fillers, whitening agents, pigments, optical brighteners, surfactants, processing aids, fibers, and stabilizers.