Patent ID: 7452290

Claim:
A golf ball comprising: (a) an inner core layer 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; (b) an outer core layer 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; and (c) a cover; 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.