Patent ID: 9694243
Date: 2017-07-04
CPC Classifications: A63B,C08K

Claim:
1. A golf ball having a spherical core and at least one cover covering the spherical core, wherein the spherical core is formed from a rubber composition containing: (a) a base rubber, (b) an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator, and at least one compound of (d) mercaptobenzoic acids and/or salts thereof, provided that the rubber composition further contains (e) a metal compound if the composition contains only (b) the α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms as the co-crosslinking agent, the rubber composition contains at least one compound of (d) the mercaptobenzoic acids and/or the salts thereof in an amount ranging from 6.3 parts by mass to 40 parts by mass with respect to 100 parts by mass of (a) the base rubber, and the spherical core has a hardness difference (Hs−Ho) between a surface hardness (Hs) and a center hardness (Ho) thereof of 20 or more in JIS-C hardness.