Patent ID: 8133947

Claim:
A golf ball material comprising a resin composition comprised of: (a-I) an olefin-acrylic acid copolymer having a weight-average molecular weight (Mw) of from about 150,000 to about 200,000 and a weight-average molecular weight (Mw) to number-average molecular weight (Mn) ratio of from about 3.0 to about 7.0, or a metal neutralization production thereof; (a-II) an olefin-methacrylic acid-unsaturated carboxylic acid ester copolymer having a weight-average molecular weight (Mw) of from about 120,000 to about 200,000 and a weight-average molecular weight (Mw) to number-average molecular weight (Mn) ratio of from about 3.0 to about 7.0, or a metal neutralization production thereof; (b) an organic acid or a metal salt thereof; and (c) a basic inorganic metal compound, wherein component (a-I) and component (a-II) have a mixing ratio therebetween of from 90:10 to 95:5 by weight, and component (b) is included in an amount of from about 100 to about 130 parts by weight per 100 parts by weight of (a-I) and (a-II) combined, and all or some acid groups in the composition are neutralized by metal ions in component (c).