Patent ID: 7731607
Filing Date: 2010-06-08
Classification: A63B,C08L

Abstract:
1. A golf ball comprising a core and a cover, wherein the core has an overall diameter of from 1.40 inches to 1.60 inches and consists of: (a) a center having a diameter of from 0.50 inches to 1.50 inches and a center hardness (H) of from 20 Shore C to 70 Shore C; (b) an intermediate core layer having a surface hardness (I) of 40 Shore C or greater and formed from a first HNP composition, the first HNP composition having a material hardness of 45 Shore D or greater and comprising a highly neutralized ethylene/(meth)acrylic acid copolymer; and (c) an outer core layer having a surface hardness (S) of from 20 Shore C to 70 Shore C and formed from a second HNP composition, the second HNP composition having a material hardness of 55 Shore D or less and comprising a highly neutralized ethylene/(meth)acrylic acid/alkyl (meth)acrylate copolymer; wherein H<I and S<I; wherein the material hardness of the second HNP composition is less than the material hardness of the first HNP composition; and wherein H<S, and wherein S−H=D, where D is an integer from 1 to 22.