| abstract |
PROBLEM TO BE SOLVED: To provide a cured product of a rubber composition for a golf ball, which can impart excellent durability to a golf ball. SOLUTION: A cured product of a rubber composition for a golf ball is (a) a base rubber, (b) an α, β-unsaturated carboxylic acid having 3 to 8 carbon atoms as a cocrosslinking agent and / or a metal salt thereof. , And (c) a rubber composition for golf balls containing a cross-linking initiator, which is obtained by curing an effective cross-linking density of DC (mmol / cm 3 ) and a tensile modulus at 0.05% to 0.25% strain. The rate TM (MPa) is characterized by satisfying the relationship of TM-3.33 × ln (DC)> (−0.10). [Selection diagram] None |