Patent ID: 9080031
Filing Date: 2015-07-14
Classification: A63B,C08F,C08K

Abstract:
1. A three-piece golf ball comprising a core having a center and one intermediate layer disposed around the center, and a cover disposed around the core, wherein the intermediate layer is formed from a golf ball resin composition consisting of 100 parts by mass of (A) an ionomer resin consisting of a metal ion-neutralized product of a ternary copolymer composed of ethylene, α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and α,β-unsaturated carboxylic acid ester, and from 33 parts to 100 parts by mass of (B) a metal salt of a fatty acid having 18 to 30 carbon atoms, and optionally a pigment component, a specific gravity adjusting agent, a dispersant, an antioxidant, an ultraviolet absorber, a light stabilizer, a fluorescent material, or a fluorescent brightener, wherein the golf ball resin composition has a melt flow rate (190 ° C., 2.16 kg) in a range from 14.7 g/10 min to 600 g/10 min and a slab hardness in a range from 51 to 70 in a Shore D hardness, and wherein the core has a center hardness in a range from 35 to 45 in Shore D hardness, a surface hardness in a range from 30 to 68 in Shore D hardness, a diameter of 39.0 mm to 42.2 mm and a compression deformation amount in a range from 2.10 mm to 3.80 mm, when applying a load from 98N as an initial load to 1275N as a final load to the core.