| 摘要 |
A golf ball having, as a constituent element, an article molded under heat from a rubber composition which includes: (a) a base rubber containing polybutadiene having a stress relaxation time (T<SUB>80</SUB>), defined as the time in seconds from the moment when rotor rotation is stopped immediately after measurement of the ML<SUB>1+4 </SUB>(100° C.) value (the Mooney viscosity measured at 100° C. in accordance with ASTM D-1646-96) that is required for the ML<SUB>1+4 </SUB>value to decrease 80%, of at most 3.5, (b) an unsaturated carboxylic acid and/or a metal salt thereof, and (c) an organic peroxide. The golf ball has an excellent rebound.
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