Golf balls having a low modulus HNP layer and a high modulus HNP layer
First Claim
1. 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.
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Abstract
The present invention is directed to golf balls comprising a fluid-filled center surrounded by an outer core, wherein the outer core comprises a layer formed from a low modulus HNP composition and a layer formed from a high modulus HNP composition. The present invention is not limited by which outer core layer is formed from the low modulus HNP composition and which layer is formed from the high modulus HNP composition, so long as both layers are present in the outer core of the golf ball. Low modulus HNP compositions of the present invention comprise a highly neutralized acid copolymer having a modulus of from 1,000 psi to 50,000 psi. High modulus HNP compositions of the present invention comprise a highly neutralized acid copolymer having a modulus of from 25,000 psi to 150,000 psi.
14 Citations
18 Claims
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1. A golf ball comprising a core and a cover, wherein the core comprises:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A golf ball comprising a core and a cover, wherein the core comprises:
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(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 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 second outer core layer surrounding the first outer core layer, wherein the second outer core layer is solid, non-wound, and 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; 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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification