| abstract |
An object of the present invention is to provide a golf ball striking a good balance between flight distance on driver shots and spin rate on approach shots, and excellent in stain resistance and shot feeling. The present invention provides a golf ball comprising a paint film, wherein a base resin of the paint film contains a polyurethane obtained by a reaction between a polyisocyanate composition and a polyol composition containing a urethane polyol having a polyether diol with a number average molecular weight in a range from 800 to 3,000 as a constituent component, and the following requirements are satisfied:n nMp≦200× X −75n nMp≦100n nMinm−Moum>40n nMoum−Mc<5n nTinm≧Toum>Tc>Tpn n(Tinm×Minm)/(Toum×Moum)>2.0n n(Toum×Moum)/(Tc×Mc)<3.0n n(Tc×Mc)/(Tp×Mp)>10.0n n[where Mp, Minm, Moum, and Mc represent a 10% elastic modulus (kgf/cm 2 ) of the paint film, inner intermediate layer, outer intermediate layer and cover, respectively; Tp, Tinm, Toum, and Tc represent a thicknesses (mm) of the paint film, inner intermediate layer, outer 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.]. |