Patent ID: 6689860
Filing Date: 2004-02-10
Classification: A63B,C08G

Abstract:
A solid golf ball comprising:a solid core comprising a solid center made from vulcanized rubber and an intermediate layer covering the solid center; and a cover covering the solid core, wherein the solid center is a vulcanized rubber sphere having an outer diameter of from 30.0 to 41.0 mm and a difference of not less than 10 in Shore D hardness between a central portion thereof and a surface portion thereof, and deforms from 2.80 to 6.00 mm by compression on condition that an initial load of 10 kgf is increased to an ultimate load of 130 kgf; the solid core has an outer diameter of from 39.0 to 41.8 mm, deforms from 2.70 to 3.50 mm by compression on condition that an initial load of 10 kgf is increased to an ultimate load of 130 kgf; the cover has an outermost layer made from polyurethane obtained by curing a composition comprising an isocyanate group-terminated urethane prepolymer and an aromatic polyamine curing agent, the isocyanate group-terminated urethane prepolymer having a residual polyisocyanate monomer content of not more than 0.1% by mass and the polyurethane has a Shore D hardness of from 35 to 60; and the golf ball deforms from 2.50 to 3.30 mm by compression on condition that an initial load of 10 kgf is increased to an ultimate load of 130 kgf.