Golf ball

A golf ball comprising a golf ball body and a paint film covering the golf ball body, wherein the paint film contains a polyurethane as a resin component, and the polyurethane comprises, as a constituent component, (A) a polyisocyanate component and (B) a polyol component containing a polyrotaxane and at least one selected from the group consisting of a polyether polyol, a polyester polyol, a polycaprolactone polyol, a polycarbonate polyol, and an acrylic polyol,

• wherein the polyrotaxane has a cyclodextrin, a linear molecule piercing through the cyclic structure of the cyclodextrin, and blocking groups located at both terminals of the linear molecule to prevent disassociation of the cyclodextrin, and at least a portion of hydroxyl groups of the cyclodextrin is modified with a caprolactone chain expressed by —(CO(CH2)5O)nH via —O—C3H6—O— group, wherein n represents the degree of polymerization and is a natural number of 2 to 70, and
• wherein a loss tangent tan δ has a peak temperature of 50° C. or less and a peak height of less than 0.8, obtained by measuring dynamic viscoelasticity of the paint film under the following conditions:
• <Measuring conditions>
• Measuring mode:
• tensile mode
• Measuring temperature range:
• from −100° C. to 150° C.
• Temperature rising rate:
• 4° C./min
• Oscillation frequency:
• 10 Hz
• Measuring strain:
• 0.1%.