Patent ID: 6620061
Filing Date: 2003-09-16
Classification: A63B,C08F,C08K

Abstract:
A two piece golf ball consisting of a core and a cover, wherein said cover is formed of a rubber composition comprising 100 parts by weight of a base rubber based on polybutadiene having at least 40% of cis-1,4-structure, 5 to 40 parts by weight of an &agr;,&bgr;-unsaturated carboxylic acid, 5 to 40 parts by weight of a metal oxide, and 0.1 to 5 parts by weight of a polymerization initiator, the rubber composition being subjected to crosslinking reaction;wherein said core is formed of a rubber composition comprising 100 parts by weight of a base rubber based on polybutadiene having at least 40% of cis-1,4-structure, 5 to 40 parts by weight of a metal salt of an &agr;,&bgr;-unsaturated carboxylic acid, 0 to 40 parts by weight of a metal oxide, and 0.1 to 5 parts by weight of a polymerization initiator, the rubber composition being subjected to crosslinking reaction.