RUBBER MOLDING PRODUCT FOR GOLF BALL, ITS MAKING METHOD AND GOLF BALL

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PROBLEM TO BE SOLVED : To produce rubber moldings with high rebound resilience and high quality at high efficiency. SOLUTION : The molded rubber material for golf balls is obtained by molding and curing a rubber compound composed of base rubber and such ingredients as cocrosslinking agent and crosslinking agent, and vulcanization accelerator, wherein the base rubber is polybutadiene which results from polymerization with the help of a catalyst of rare earth element and has a stress relaxation time (T80) no longer than 5 (measured according to ASTM D 1646-96), the vulcanization accelerator is hexamethylenetetramine, and the rubber compound contains an organosulfur compound. A method for producing the molded rubber material, and a golf ball are provided. COPYRIGHT : (C)2007, JPO&INPIT