Patent ID: 9533195
Date: 2017-01-03
CPC Classifications: A63B,C08K

Claim:
1. A golf ball having a spherical core and at least one cover layer 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 (d) a carboxylic acid having a heterocyclic ring and/or a salt thereof, provided that the rubber composition further contains (e) a metal compound if only (b) the α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms is present as the co-crosslinking agent, wherein (d) the carboxylic acid having a heterocyclic ring and/or salt thereof is a compound represented by the following formula (1), and/or the salt thereof: wherein R