Patent ID: 7014572

Claim:
A golf ball comprising: a core formed of a high cis-1,4 content polybutadiene, 26 to 32 parts by weight of a co-crosslinking agent, 3 to 5 parts by weight of a metal oxide activator, 0.8 to 1.5 phr of a free-radical initiator, and a first predetermined amount of inorganic fillers sufficient to produce a specific gravity of the core within the range of 1.12 to 1.13; and a cover layer formed of a blend of at least first and second ionomers, and a second predetermined amount of inorganic fillers sufficient to produce a specific gravity of the cover layer with the range of 1.115 to 1.134, the cover layer having a hardness of 56 to 63 on a Shore D Hardness Scale, and a thickness of 0.060 to 0.85 inches, the compositions of the core and the cover layer each being sufficiently mixed to ensure random orientation of the ball when the ball is floated in a solution of sufficient density to support the ball, the solution having a specific gravity of approximately 1.2, the specific gravity of the core and the specific gravity of the cover layer being within 0.005 of each other.