Patent ID: 7084198

Claim:
A golf ball material comprising a heated mixture of (a) a random copolymer containing at least 5% by weight of a Na + ion neutralized product of unsaturated carboxylic acid having an acid content of at least 16% by weight, (b) an olefin elastomer having crystalline polyolefin blocks, (c) a fatty acid or derivative thereof or both, having a molecular weight of 280 to 1,500, and (d) a basic metal compound capable of neutralizing unneutralized acid groups in components (a) and (c), wherein components (c) and (d) are included in amounts of 5 to 80 parts by weight and 0.1 to 10 parts by weight, respectively, per 100 parts by weight of components (a) and (b) combined, and the weight ratio of component (a) to (b) is from 95/5 to 70/30.