Multi-layer golf ball
First Claim
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1. A golf ball comprising:
- (a) an inner core layer formed from a first composition, the first composition having a Shore D hardness of 65 or less and comprising an ethylene/(meth)acrylic acid/alkyl (meth)acrylate copolymer wherein 40% to 100% of the acid groups of the acid copolymer are neutralized;
(b) an outer core layer formed from a second composition, the second composition having a Shore D hardness of 35 or greater and comprising a highly neutralized ethylene/(meth)acrylic acid copolymer wherein from 40% to 100% of the acid groups of the acid copolymer are neutralized; and
(c) a cover;
wherein the Shore D hardness of the first composition is less than the Shore D hardness of the second composition.
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Abstract
The present invention is directed to multi-layer golf balls including a layer formed from a relatively soft or low modulus HNP composition and a layer formed from a relatively hard or high modulus HNP composition. Optionally, the soft (or low modulus) HNP composition and/or the hard (or high modulus) HNP composition is plasticized or is replaced with a different plasticized acid copolymer composition.
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Citations
12 Claims
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1. A golf ball comprising:
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(a) an inner core layer formed from a first composition, the first composition having a Shore D hardness of 65 or less and comprising an ethylene/(meth)acrylic acid/alkyl (meth)acrylate copolymer wherein 40% to 100% of the acid groups of the acid copolymer are neutralized; (b) an outer core layer formed from a second composition, the second composition having a Shore D hardness of 35 or greater and comprising a highly neutralized ethylene/(meth)acrylic acid copolymer wherein from 40% to 100% of the acid groups of the acid copolymer are neutralized; and (c) a cover; wherein the Shore D hardness of the first composition is less than the Shore D hardness of the second composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification