| abstract |
A polybutadiene containing at least 60% by weight of a cis-1,4-bond and having a Mooney viscosity (ML 1 + 4 (100 ° C.)) of 40 or more; an unsaturated carboxylic acid and / or a metal salt thereof; A golf ball comprising, as constituents, a heat-formed product of a rubber composition containing a peroxide and a monophenolic antioxidant. The golf ball of the present invention does not suffer from burning during rubber kneading, can be manufactured with good workability, and does not reduce resilience. [Selection diagram] None |