Patent ID: 7431669

Claim:
A golf ball comprising: a core comprising a high cis-content polybutadiene rubber, a co-crosslinking agent, and a free radical initiator, the core having a deflection, under an applied static load of 200 lb., of greater than about 0.160 inches; an inner layer comprising about 60% to about 80% ethylene, from about 8% to about 20% by weight of an α, β-unsaturated carboxylic acid and from about 5% to about 25% of an n-alkyl acrylate, about 100% of the carboxylic acid of the inner layer being neutralized with metal ions; and a cover layer comprising about 80% to about 82% by weight of ethylene and about 18% to 20% of weight of an α, β-unsaturated carboxylic acid, and having a shore D hardness within the range of 50 to 75.