Patent ID: 6729973
Filing Date: 2004-05-04
Classification: A63B

Abstract:
A solid golf ball composed of at least one layer of a rubber material as a component, whereinthe rubber material is formed from the rubber composition comprising a base rubber, a co-crosslinking agent, an organic peroxide and an inorganic filler, and the rubber composition comprises 10 to 100 parts by weight of a polybutadiene containing a cis-1,4 bond of not less than 80%, having a Mooney viscosity of not less than 50 to less than 65 MLl+4(100Â° C.), a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) of 2.5 to 3.5 and Mw of 50Ã—104 to 70Ã—104, synthesized using lanthanide-containing catalyst, based on 100 parts by weight of the base rubber, the polybutadience having a content of a 1,2 double bond of from 0.7 to 1.8%.