Patent ID: 7238123

Claim:
A multi-piece solid golf ball comprising a solid core, at least one intermediate layer enclosing the solid core, and a cover enclosing the intermediate layer, wherein the solid core is formed mainly of a base rubber containing an organosulfur compound, the intermediate layer is formed mainly of a base resin containing at least 50% by weight of a polyurethane elastomer, the cover is formed mainly of a polyurethane elastomer, the intermediate layer and the cover have Shore D hardnesses that meet 0<[(cover Shore D hardness)−(intermediate layer Shore D hardness)]≦20, the total gage of the intermediate layer and the cover is from 1.5 to 3.2 mm, and the cover is formed of a composition comprising, in admixture, the polyurethane elastomer and an isocyanate mixture of an isocyanate compound having at least two isocyanate groups as functional groups in a molecule, dispersed in a thermoplastic resin which is substantially non-reactive with the isocyanate groups.