Three-layer-core golf ball having highly-neutralized polymer outer core layer
AssigneeAcushnet Company
InventorsMurali Rajagopalan, Michael J. Sullivan
Life of this patent
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Abstract
A golf ball including an inner core layer formed from a thermoset rubber composition and having a first surface hardness; a thermoplastic outer core layer having a second surface hardness, an inner surface hardness, and being formed from a copolymer of ethylene and an α,β-unsaturated carboxylic acid, an organic acid or salt thereof, and sufficient cation source to fully-neutralize the acid groups of the copolymer; an inner cover layer; and an outer cover layer; wherein the first surface hardness is substantially the same as the second surface hardness and the inner surface hardness.
Claims9
A golf ball comprising:
- an inner core layer comprising a thermoset rubber composition and having a first outer Shore D hardness and an outer diameter of about 1.3 inches to about 1.56 inches;
- a thermoplastic outer core layer having a second outer Shore D hardness, and comprising a copolymer of ethylene and an α,β-unsaturated carboxylic acid, a magnesium salt of oleic acid, and sufficient cation source to fully-neutralize the acid groups of the copolymer;
- an inner cover layer;
- and
- an outer cover layer;
- wherein the first outer hardness is greater than the second outer hardness and the outer core layer has a thickness of about 0.01 inches to about 0.05 inches.
Dependencies are inferred from the claim text.