Patent ID: 6692381
Filing Date: 2004-02-17
Classification: A63B

Abstract:
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 of the layers of the core is formed by vulcanizing and press-molding a rubber composition comprising(a) a base rubber comprising polybutadiene rubber containing a cis-1,4-bond of not less than 99%, (b) a co-crosslinking agent, and (c) an organic peroxide, wherein the polybutadiene rubber containing a cis-1,4-bond of not less than 99% is synthesized by using a catalyst composition comprising (d) a metallocene type complex of a rare-earth metal compound and (e) an ionic compound consisting of a non-coordinating anion and cation and/or aluminoxane.