Patent ID: 7402114

Claim:
A golf ball comprising: a core having a diameter ranging from 1.35 inches to 1.64 inches and having a PGA compression ranging from 50 to 90, the core composed of a thermoplastic material comprising copolymer of an aipha-olefin and an alpha, beta-unsaturated carboxylic acid, an aipha-olefin and an alkyl acrylate, and a fatty acid or salt of a fatty acid, a heavy mass filler in an amount ranging from 10 parts by weight to 50 parts by weight of the material, the heavy mass filler having a density greater than the copolymer; wherein the thermoplastic material is neutralized from 50% to 100%; a boundary layer formed over the core, the boundary layer composed of an ionomer material, the boundary layer having a thickness ranging from 0.020 inch to 0.075 inch, the ionomer material having a Shore D hardness ranging from 50 to 70 as measured according to ASTM-D2240; and a cover formed over the boundary layer, the cover composed of a fast chemical reaction aliphatic polyurethane material formed from reactants comprising and a polyurethane prepolymer and a polyol, wherein the polyurethane material has a Shore D hardness ranging from 30 to 60 as measured according to ASTM-D2240, a thickness ranging from 0.015 inch to 0.044 inch, and an aerodynamic surface geometry thereon.