Patent ID: 6943208
Filing Date: 2005-09-13
Classification: A63B,C08K

Abstract:
1. A solid golf ball comprising a solid core formed using a molded and vulcanized product of a rubber composition as a constituent component, the rubber composition comprising 100 parts by weight of a base rubber composed primarily of a polybutadiene containing at least 60% by weight of cis-1,4-bond, having a Mooney viscosity (ML 15 to 50 parts by weight of an unsaturated carboxylic acid and/or a metal salt thereof, at least 2 parts by weight of a processing aid having a melting point of 60 to 115° C., and at least two organic peroxides including an organic peroxide having the shortest half-life at 155° C. designated (a) and another organic peroxide having the longest half-life at 155° C. designated (b), a ratio of half-lives (b and an organosulfur compound in an amount of 0.2 to 5 parts by weight per 100 parts by weight of the base rubber, wherein the polybutadiene has a polydispersity index Mw/Mn of 2.0 to 8.0 wherein Mw is a weight average molecular weight and Mn is a number average molecular weight, wherein the processing aid comprises a mixture of compounds of higher fatty acid metal salts represented by RCOOM, wherein the number of carbon atoms in R is at least 1 and up to 31 and the mixture has the melting range of 60 to 115° C., and wherein the solid core has a deflection of 2.0 to 6.0 mm under an applied load of 100 kg.