Highly-neutralized thermoplastic copolymer center for improved multi-layer core golf ball
First Claim
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1. A golf ball comprising:
- a center comprising a highly-neutralized thermoplastic copolymer of ethylene and an α
,β
-unsaturated carboxylic acid, the acid being 100% neutralized by a salt of an organic acid and a cation source;
a cover; and
an intermediate layer disposed between the center and the cover;
wherein the golf ball has a first coefficient of restitution of 0.81 or greater when measured at an incoming velocity of 125 ft/s and a second coefficient of restitution of 0.76 or greater when measured at an incoming velocity of 160 ft/s; and
a sphere resulting from a combination of the center and the intermediate layer has a compression of 60 or greater; and
wherein the center has a diameter of from 0.80 inches to 1.40 inches and a compression of 30 or less, and the intermediate layer has flexural modulus of 50,000 psi to 70,000 psi and a thickness of 0.110 inches to 0.180 inches, and the cover comprises thermoset polyurea or hybrid thereof having a hardness of from 45 Shore D to 60 Shore D and a thickness from 0.020 inches to 0.040 inches.
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Abstract
A golf ball comprising a center comprising a highly-neutralized thermoplastic copolymer of ethylene and an α,β-unsaturated carboxylic acid, the acid being 100% neutralized by a salt of an organic acid, a cation source, or a suitable base of the organic acid; a cover; and an intermediate layer disposed between the center and the cover; wherein the golf ball has a first coefficient of restitution of 0.81 or greater when measured at an incoming velocity of 125 ft/s; and a sphere resulting from a combination of the center and the intermediate layer has a compression of 60 or greater.
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Citations
9 Claims
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1. A golf ball comprising:
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a center comprising a highly-neutralized thermoplastic copolymer of ethylene and an α
,β
-unsaturated carboxylic acid, the acid being 100% neutralized by a salt of an organic acid and a cation source;a cover; and an intermediate layer disposed between the center and the cover; wherein the golf ball has a first coefficient of restitution of 0.81 or greater when measured at an incoming velocity of 125 ft/s and a second coefficient of restitution of 0.76 or greater when measured at an incoming velocity of 160 ft/s; and
a sphere resulting from a combination of the center and the intermediate layer has a compression of 60 or greater; andwherein the center has a diameter of from 0.80 inches to 1.40 inches and a compression of 30 or less, and the intermediate layer has flexural modulus of 50,000 psi to 70,000 psi and a thickness of 0.110 inches to 0.180 inches, and the cover comprises thermoset polyurea or hybrid thereof having a hardness of from 45 Shore D to 60 Shore D and a thickness from 0.020 inches to 0.040 inches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification