Patent ID: 6386993
Filing Date: 2002-05-14
Classification: A63B,C08K

Abstract:
A two-piece golf ball, comprising:a core, said core is formed from a rubber composition comprising: 20 to 40 parts by weight of a co-crosslinking agent, 0.5 to 3.0 parts by weight of an organic peroxide, and 0.1 to 5.0 parts by weight of an organic sulfide compound, based on 100 parts by weight of cis-1,4-polybutadiene containing not less than 40% of cis-1,4 bond content as a base rubber; and a cover formed on the core, wherein the core has a diameter of 38.5 to 40.5 mm, a JIS-C center hardness of not more than 60, a JIS-C surface hardness of 70 to 95, a difference between the center hardness and the surface of 20 to 40 and a deformation amount of 2.8 to 3.4 mm when applying from an initial load of 10 kgf to a final load of 130 kgf, and the cover has a Shore D hardness of not more than 60 and a thickness of 1.2 to 2.0 mm.