| abstract |
A golf ball has a cover member and a core member. The cover member contains: 3 to 30 parts by weight of a thermoplastic elastomer containing polyamide; 5 to 50 parts by weight of a terpolymer ionomer containing ethylene, (meth)acrylic acid, and (meth)acrylic ester; 30 to 80 parts by weight of a copolymer ionomer containing ethylene and (meth)acrylic acid; and 1 to 20 parts by weight of an epoxidized-diene-based block copolymer. The core member is formed by vulcanizing a rubber composition containing: 100 parts by weight of a base rubber, A parts by weight of an α, β-unsaturated carboxylic acid or a metal salt thereof, B parts by weight of an organic peroxide, and C parts by weight of a sulfide where A, B, and C satisfies the relationship: n n n 0.02×A≦B+C≦0.05×A, n n n and n A lies in the range from 25 to 45. |