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US 9,808,675 B2Granted
Golf ball compositions
AssigneeAcushnet Company
InventorsMichael Michalewich, Brian Comeau, Shawn Ricci
Life of this patent
Estimating the term…
Abstract
Disclosed herein are polyurethane golf ball compositions. The compositions are prepared by adding a UV absorber to a polyol prior to reacting the polyol with an isocyanate to form a prepolymer, or by adding the UV absorber to the prepolymer, which is then reacted with a curing agent to form the polyurethane.
Claims4
A golf ball comprising:
- an inner core layer formed from a diene rubber composition and having a diameter of from 0.950 inches to 1.015 inches, an Atti compression of 30 or less, a center Shore C hardness of from 65 to 75, a surface Shore C hardness of from 50 to 65, and a zero hardness gradient or a negative hardness gradient wherein the difference between the Shore C hardness of the outer surface of the inner core layer and the Shore C hardness of the center of the inner core layer is from −15 to −5;
- an outer core layer formed from a diene rubber composition and having a thickness of from 0.250 inches to 0.300 inches and an outer surface Shore C hardness of from 85 to 95;
- an inner cover layer formed from an ionomer composition and having a thickness of from 0.030 inches to 0.040 inches and an outer surface Shore C hardness of 93 or greater;
- an outer cover layer formed from a polyurethane composition and having a thickness of from 0.030 inches to 0.035 inches and an outer surface Shore C hardness of from 75 to 90;
- a pigmented solvent-borne primer coat;
- and
- a solvent-borne top coat;
- wherein the polyurethane outer cover layer composition comprises a reaction product of a prepolymer and a curing agent, wherein the prepolymer is a reaction product of a polyol mixture and a diisocyanate, wherein the polyol mixture comprises 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol;
- and
- wherein a core assembly consisting of the inner core layer and the outer core layer has an Atti compression of from 80 to 95.
7 more elements
A golf ball comprising:
- a solid, single-layer core formed from a diene rubber composition and having a diameter of from 1.510 inches to 1.530 inches, an Atti compression of from 65 to 80, a center Shore C hardness of from 65 to 75, a surface Shore C hardness of from 65 to 75, and a zero hardness gradient or a negative or positive hardness gradient wherein the difference between the Shore C hardness of the outer surface of the core and the Shore C hardness of the center of the core is from −8 to 8;
- an inner cover layer formed from an ionomer composition and having a thickness of from 0.040 inches to 0.050 inches and an outer surface Shore C hardness of 93 or greater;
- an outer cover layer formed from a polyurethane composition and having a thickness of from 0.030 inches to 0.035 inches and an outer surface Shore C hardness of from 75 to 90;
- a pigmented solvent-borne primer coat;
- and
- a solvent-borne top coat;
- wherein the polyurethane outer cover layer composition comprises a reaction product of a prepolymer and a curing agent, wherein the prepolymer is a reaction product of a polyol mixture and a diisocyanate, wherein the polyol mixture comprises 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol.
4 more elements
Dependencies are inferred from the claim text.