Patent ID: 8372911

Claim:
A golf ball material which is a resin mixture comprising: a nonionic olefin-unsaturated carboxylic acid copolymer and/or olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester copolymer having a weight-average molecular weight (Mw) of from 40,000 to 200,000, a weight-average molecular weight (Mw)/number-average molecular weight (Mn) ratio of from 2.5 to 10.0 and an unsaturated carboxylic acid content of at least 16 wt %, a nonionic olefin-unsaturated carboxylic acid copolymer and/or olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester copolymer having a weight-average molecular weight (Mw) of from 40,000 to 200,000, a weight-average molecular weight (Mw)/number-average molecular weight (Mn) ratio of from 4.0 to 10.0 and an unsaturated carboxylic acid content of 15 wt % or less, an organic acid or a metal salt thereof, a basic inorganic metal compound for neutralizing at least 70 mol % of acid groups in components (a) to (c), and a spherical inorganic filler; wherein the resin mixture has a Shore D hardness of from 40 to 60, has a mixing ratio by weight (a):(b) between component (a) and component (b) of from 20:80 to 80:20, includes component (c) in an amount of from 30 to 80 parts by weight per 100 parts by weight of components (a) and (b) combined, and includes component (e) in an amount of from 0.01 to 20 parts by weight per 100 parts by weight of components (a) and (b) combined.