Patent ID: 8414425

Claim:
A golf ball comprising a core, at least one intermediate layer and a cover, wherein the intermediate layer is formed primarily of a resin mixture comprising: 100 parts by weight of a resin component composed of, in admixture, a base resin of (a) an olefin-unsaturated carboxylic acid random copolymer and/or a metal ion neutralization product of an olefin-unsaturated carboxylic acid random copolymer mixed with (b) an olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester random terpolymer and/or a metal ion neutralization product of an olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester random terpolymer in a weight ratio between 100:0 and 0:100, and (e) a non-ionomeric thermoplastic elastomer wherein the weight ratio of the base resin to component (e) is between 100:0 and 50:50; (c) 81 to 150 parts by weight of a fatty acid and/or fatty acid derivative having a molecular weight of 228 to 1500; and (d) about 0.1 to about 17 parts by weight of a basic inorganic metal compound capable of neutralizing un-neutralized acid groups in the base resin and component (c); and the cover is formed primarily of a mixture comprising 100 parts by weight of an ionomer resin and 5 to 35 parts by weight of a granular inorganic filler.