Highly-neutralized thermoplastic copolymer center for improved multi-layer core golf ball
First Claim
Patent Images
1. A golf ball comprising:
- a center having a diameter of from 0.80 inches to 1.40 inches, a compression of from 62 to 107, and formed from a composition comprising;
a copolymer of ethylene and an α
, β
-unsaturated carboxylic acid, optionally including a softening monomer selected from the group consisting of alkyl acrylates and methacrylates;
an organic acid or salt thereof present in an amount of from 5 wt% to 50 wt %, based on the total weight of the copolymer and organic acid or salt thereof; and
a cation source present in an amount sufficient to neutralize greater than 80% of all acid groups present in the composition;
an outer core layer having a thickness of 0.090 inches or greater and formed from a composition having a Shore D hardness of from 40 to 70; and
a cover formed from a polyurethane;
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
wherein a sphere resulting from a combination of the center and the outer core layer has a compression of 80 or greater; and
wherein the Shore D hardness of the center composition is less than the Shore D hardness of the outer core layer composition.
6 Assignments
0 Petitions
Accused Products
Abstract
Multi-layer golf balls comprising a center, intermediate layer, and cover are disclosed. The center is formed from a highly-neutralized acid copolymer composition.
-
Citations
17 Claims
-
1. A golf ball comprising:
-
a center having a diameter of from 0.80 inches to 1.40 inches, a compression of from 62 to 107, and formed from a composition comprising; a copolymer of ethylene and an α
, β
-unsaturated carboxylic acid, optionally including a softening monomer selected from the group consisting of alkyl acrylates and methacrylates;an organic acid or salt thereof present in an amount of from 5 wt% to 50 wt %, based on the total weight of the copolymer and organic acid or salt thereof; and a cation source present in an amount sufficient to neutralize greater than 80% of all acid groups present in the composition; an outer core layer having a thickness of 0.090 inches or greater and formed from a composition having a Shore D hardness of from 40 to 70; and a cover formed from a polyurethane; 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 wherein a sphere resulting from a combination of the center and the outer core layer has a compression of 80 or greater; and wherein the Shore D hardness of the center composition is less than the Shore D hardness of the outer core layer composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification