发明公开
EP2926871A1 GOLF BALL 审中-公开
高尔夫球

GOLF BALL
摘要:
An object of the present invention is 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. The present invention provides a golf ball comprising an intermediate layer, a cover, and a paint film, wherein a base resin of the paint film 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 Me represent 10 % modulus (kgf/cm 2 ) 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 a OH group in the polyol composition.]
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