Patent ID: 6919393
Filing Date: 2005-07-19
Classification: A63B

Abstract:
1. A solid golf ball comprising at least one layer of a core, and at least one layer of a cover formed on the core, wherein at least one layer including the inmost layer of the core is formed by vulcanizing a rubber composition comprising a base rubber, a co-crosslinking agent, a vulcanization initiator and a filler, the core has a center hardness in JIS-C hardness of 40 to 60, a surface hardness in JIS-C hardness of 80 to 95 and a hardness difference (B−A) between a hardness in JIS-C hardness at a distance of 5 mm from the center point of the core (B) and the center hardness (A) of not less than 1 to less than 10; wherein the rubber composition for the core comprises at least one organic sulfur compound selected from the group consisting of bis(pentachlorophenyl)disulfide and bis(pentabromophenyl)disulfide wherein the rubber composition for the core comprises further at least one hydroquinone compound selected from the group consisting of compounds which are represented by the following formula (5): wherein R the hydroquinone compound is present in an amount within the range of 0.002 to 5 parts by weight, based on 100 parts by weight of the base rubber.