Patent ID: 7534835
Filing Date: 2009-05-19
Classification: A63B,C08F

Abstract:
1. A golf ball comprising a material molded under heat from a rubber composition comprised of: (a) a base rubber composed primarily of a mixture of at least 60 wt % of a polybutadiene having a stress relaxation time (T 80 ), defined as the length of time it takes from the moment rotor rotation is stopped immediately after measurement of the ML 1+4 (100° C.) value (the Mooney viscosity measured at 100° C. in accordance with ASTM D1646-96) for the ML 1+4 value to decrease 80%, of less than 4 seconds with up to 40 wt % of a polybutadiene having a stress relaxation time (T 80 ) of at least 4 seconds; (b) an unsaturated carboxylic acid and/or a metal salt thereof; and (c) an organic peroxide; wherein both the polybutadiene having T