Patent ID: 9345933
Filing Date: 2016-05-24
CPC Classification: A63B,C08K,C08L

Claim Text:
1. A multi-piece golf ball comprising a core composed of a center and an envelope layer covering the center and at least one cover covering the core, wherein the center is formed from a center composition containing: (A) at least one resin component selected from the group consisting of (B) a basic metal salt of a fatty acid, wherein the center composition contains (B) the basic metal salt of the fatty acid in an amount range of from 25 parts to 100 parts by mass with respect to 100 parts by mass of (A) the resin component, and wherein the basic metal salt of the fatty acid is represented by the following general formula (1): wherein m ranges from 0.3 to 2.0, RCOO represents a residue of the fatty acid, and M wherein the center and surface of the core differ in hardness such that the surface has a hardness that is 10 or more in Shore D higher than the center, and wherein the envelope layer is formed from a rubber composition.