Golf ball compositions

Patent metadata

Field	Value
Publication number	US-9227109-B2
Application number	US-201213613095-A
Country	US
Kind code	B2
Filing date	Sep 13, 2012
Priority date	Sep 13, 2012
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

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, which is then reacted with a curing agent to form the polyurethane.

First claim

What is claimed is:

1. 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, and wherein the polyol mixture comprises a UV absorber in an amount such that the final polyurethane comprises from 4 wt % to 6 wt % of the UV absorber; 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.

2. The golf ball of claim 1 , wherein the UV absorber is 2-(2H-benzotriazol-2-yl)-4,6-ditertpentylphenol.

3. The golf ball of claim 1 , wherein the outer cover layer of the golf ball comprises a plurality of dimples having an effective edge angle and an edge radius, wherein the effective edge angle is greater than and the edge radius is less than that of a corresponding golf ball identical in all respects except that the primer coat is a pigmented waterborne primer coat.

Assignees

• Michalewich Michael
• Comeau Brian
• Ricci Shawn
• Kuntimaddi Manjari
• Hogge Matthew F
• Nardacci Nicholas M
• Madson Michael R
• Acushnet Co

Inventors

• Michalewich Michael
• Comeau Brian
• Ricci Shawn
• Kuntimaddi Manjari
• Hogge Matthew F
• Nardacci Nicholas M
• Madson Michael R

Classifications

• A63B37/0045

  Thickness · CPC title

• A63B37/0065

  Deflection or compression · CPC title

• C08G18/10

  Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step · CPC title

• C08K5/005

  Stabilisers against oxidation, heat, light, ozone · CPC title

• A63B37/0012

  Dimple profile, i.e. cross-sectional view · CPC title