Patent ID: 7530907

Claim:
A golf ball comprising a core and a cover, wherein the core comprises: (a) a fluid mass at the center; (b) a first outer core layer surrounding the fluid mass, wherein the first outer core layer is solid, non-wound, and formed from a low modulus HNP composition, the low modulus HNP composition comprising: a highly neutralized ethylene/(meth)acrylic acid/alkyl (meth)acrylate copolymer having a modulus of from 1,000 psi to 50,000 psi; and (c) a second outer core layer surrounding the first outer core layer, wherein the second outer core layer is solid, non-wound, and formed from a high modulus HNP composition, the high modulus HNP composition comprising: a highly neutralized ethylene/(meth)acrylic acid copolymer having a modulus of from 25,000 psi to 150,000 psi; wherein the modulus of the highly neutralized copolymer of the low modulus HNP composition is at least 10% less than the modulus of the highly neutralized copolymer of the high modulus HNP composition.