| 摘要 |
PROBLEM TO BE SOLVED: To provide a golf ball striking a good balance between a flight distance on driver shots and a spin rate on approach shots, and excellent in stain resistance and a shot feeling.SOLUTION: The present invention provides a golf ball 1 comprising an intermediate layer 3, a cover 5, and a paint film 6, wherein a base resin of the paint film 6 is a polyurethane obtained by a reaction between a polyisocyanate composition and a polyol composition containing a urethane polyol including a polyether diol with a number average molecular weight ranging from 800 to 3000 as a constituent component, and the golf ball satisfies the following requirements: Mp≤200×X-75, Mp≤100, Mm-Mc>100, Tm>Tc>Tp, (Tm×Mm)/(Tc×Mc)>7.5, (Tc×Mc)/(Tp×Mp)>2.4 [Mp, Mm and Mc represent 10% modulus (kgf/cm) of the paint film, intermediate layer and cover, respectively; Tp, Tm and Tc represent thicknesses (mm) of the paint film, intermediate layer and cover, respectively; and X represents a molar ratio (NCO/OH) of a NCO group in the polyisocyanate composition to an OH group in the polyol composition]. |
