Patent ID: 8388466
Filing Date: 2013-03-05
Classification: A63B,C08G,C08L

Abstract:
1. A golf ball comprising a core and a cover positioned outside the core, the golf ball having numerous dimples on a surface of the cover, wherein the cover is formed of a resin composition including thermoplastic polyurethane (A) and a polyisocyanate mixture (B), the polyisocyanate mixture (B) includes a urethane prepolymer (B2) having two or more isocyanate groups, the cover has a hardness, measured with a Shore D type hardness scale, of 30 or greater and 55 or less, the cover has a thickness of 1.0 mm or greater and 2.0 mm or less, a difference (Hb−Hc) between a hardness Hb of the golf ball and a hardness Hc of the core which are measured with the Shore D type hardness scale is equal to or greater than −10 and equal to or less than 10, a ratio of the total area of all the dimples to a surface area of a phantom sphere of the golf ball is less than 75%, and the numerous dimples include a dimple having a curvature radius at an edge thereof in a range of 0.1 mm to 10 mm.