Patent ID: 7700689

Claim:
A golf ball material comprising: (i) a non-ionomeric thermoplastic resin, (ii) an ionomeric resin and/or an acid-containing polymer selected from the group consisting of olefin unsaturated carboxylic acid copolymers, olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester terpolymers, unsaturated carboxylic anhydride-containing polymers, unsaturated dicarboxylic acid-containing polymers, and unsaturated dicarboxylic acid half ester-container polymers, and (iii) a norbornene dicarboxylic anhydride and/or a derivative thereof, which is obtained by the steps of, in order, melt-blending (iii) a norbornene dicarboxylic anhydride and/or a derivative thereof, a peroxide, and (i) the non-ionomeric thermoplastic resin in a temperature range at which the peroxide does not decompose too soon; adding (ii) the ionomeric resin and/or the acid-containing polymer; and melt-mixing at the temperature or above at which the peroxide decomposes; wherein the non-ionomeric thermoplastic resin (i) is one or more selected from among polystyrene elastomers, polyacrylate polymers, polyurethane elastomers and polyacetals, and the weight ratio (i)/(ii) is from 1/99 to 99/1.