Patent ID: 6670422
Filing Date: 2003-12-30
Classification: A63B,C08F,C08K

Abstract:
A rubber composition for golf balls, comprising;100 parts by weight of a base rubber containing 5 to 30% by weight of syndiotactic-1,2-polybutadiene and at least 40% by weight of cis-1,4-polybutadiene; 5 to 10 parts by weight of a metal salt of an unsaturated carboxylic acid; up to 2 parts by weight of an inorganic filler; and 10 to 30% by weight based on the weight of the unsaturated carboxylic acid metal salt of an initiator; and no fine-particulate polyolefin, wherein the rubber composition can be molded and vulcanized into a rubber product having a specific gravity of less than 1.