# US 2008/0188326 A1 · Compositions for Golf Equipment

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- Number: US 2008/0188326 A1
- Document ID: US20080188326A1
- Status: Published application
- Kind: A1
- Application number: 12/061,960
- Filed: 2008-04-03
- Published: 2008-08-07
- Earliest claimed: 2002-08-27
- Assignees: Acushnet Company
- Inventors: Shenshen Wu; Shawn Ricci
- Web page: https://patentgrep.com/patent/US20080188326A1

## CPC

- A63B 37/0064: {Diameter}
- A63B 37/0003: {Golf balls}
- A63B 37/0022: {Coatings, e.g. paint films; Markings}
- A63B 37/0023: {Covers}
- A63B 37/0024: {Materials other than ionomers or polyurethane}
- A63B 37/0032: {Hardness gradient}
- A63B 37/0033: {Thickness}
- A63B 37/0037: {Flexural modulus; Bending stiffness}
- A63B 37/0038: {Intermediate layers, e.g. inner cover, outer core, mantle}
- A63B 37/0049: {Flexural modulus; Bending stiffness}
- A63B 37/005: {Cores}
- A63B 37/0061: {Coefficient of restitution}
- A63B 37/0062: {Hardness}
- A63B 37/0065: {Deflection or compression}
- A63B 37/0078: {Coefficient of restitution}
- A63B 37/0087: {Deflection or compression}
- C08G 18/10: Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G 18/44: Polycarbonates
- C08G 18/4615: {containing nitrogen}
- C08G 18/4854: {Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group}
- C08G 18/5024: {containing primary and/or secondary amino groups}
- C08G 18/5039: {containing amide groups}
- C08G 18/69: Polymers of conjugated dienes {(hydrogenated polymers of conjugated dienes C08G18/6208)}
- C08G 18/696: {containing heteroatoms other than oxygen and other than the heteroatoms of copolymerised vinyl monomers}
- C08G 18/758: {containing two or more cycloaliphatic rings}
- C08G 18/798: {containing urethdione groups}
- A63B 37/0031: {Hardness}
- A63B 37/0035: {Density; Specific gravity}
- A63B 37/0043: {Hardness}
- A63B 37/0045: {Thickness}
- A63B 37/0047: {Density; Specific gravity}
- A63B 37/0084: {Initial velocity}
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

A golf ball comprising a core, an inner cover layer, and an outer cover layer, the outer cover layer being formed from a polyurea including a prepolymer and an amine curative. The prepolymer is formed from an aliphatic isocyanate and a secondary polyamine polyether having a formula: where x=1-70; R1 and R2 each independently=a C1-20 alkyl group, phenyl, or a mixture thereof; and R3═H, CH3, or a mixture thereof.

## Claims

### Claim 1

A golf ball comprising a core, an inner cover layer, and an outer cover layer, the outer cover layer being formed from a polyurea comprising:
a prepolymer comprising:
an aliphatic isocyanate; and
a secondary polyamine polyether having a formula:
where x=1-70; R1 and R2 each independently=a C1-20 alkyl group, phenyl, or a mixture thereof; and R3═H, CH3, or a mixture thereof; and
an amine curative.

### Claim 2 (depends on 1)

The golf ball of claim 1, wherein the amine curative comprises 3,5-diethyl-2,4-toluenediamine or 3,5-diethyl-2,6-toluenediamine.

### Claim 3 (depends on 1)

The golf ball of claim 1, wherein the aliphatic isocyanate comprises 2% by weight to 15% by weight reactable isocyanate moieties.

### Claim 4 (depends on 3)

The golf ball of claim 3, wherein the aliphatic isocyanate comprises 5% by weight to 11% by weight reactable isocyanate moieties.

### Claim 5 (depends on 4)

The golf ball of claim 4, wherein the aliphatic isocyanate comprises 6% by weight to 9.5% by weight reactable isocyanate moieties.

### Claim 6 (depends on 1)

The golf ball of claim 1, wherein the aliphatic isocyanate comprises 1,6-hexamethylene diisocyanate.

### Claim 7 (depends on 1)

The golf ball of claim 1, wherein the aliphatic isocyanate comprises uretdione of hexamethylene diisocyanate

### Claim 8 (depends on 1)

The golf ball of claim 1, wherein the aliphatic isocyanate comprises isocyanurate of hexamethylene diisocyanate

### Claim 9 (depends on 1)

The golf ball of claim 1, wherein the aliphatic isocyanate comprises dimerized uretdione of hexamethylene diisocyanate, trimerized isocyanurate of hexamethylene diisocyanate, and trimerized biuret of hexamethylene diisocyanate.

### Claim 10 (depends on 1)

The golf ball of claim 1, wherein the aliphatic isocyanate comprises 2,2′-diphenylmethane diisocyanate, 2,4′-diphenylmethane diisocyanate, or 4,4′-diphenylmethane diisocyanate.

### Claim 11 (depends on 1)

The golf ball of claim 1, wherein the secondary polyamine polyether does not contain an —OH group.

### Claim 12 (depends on 1)

The golf ball of claim 1, wherein the core comprises a solid center and an outer core layer.

### Claim 13 (depends on 12)

The golf ball of claim 12, wherein the center has an outer diameter of 0.095 inches to 1.1 inches.

### Claim 14 (depends on 1)

The golf ball of claim 1, wherein the outer cover layer has a material hardness of 70 Shore C to 80 Shore C and a hardness, as measured on the golf ball, of 40 Shore D to 55 Shore D.

### Claim 15 (depends on 1)

The golf ball of claim 1, wherein the outer cover layer has a first hardness and the inner cover layer has a second hardness, and a ratio of the first to second hardness is 0.8 to 0.7.

### Claim 16 (depends on 1)

The golf ball of claim 1, wherein the outer cover layer has a thickness of 0.025 inches to 0.04 inches.

### Claim 17 (depends on 1)

The golf ball of claim 1, wherein the inner cover layer has a thickness of 0.01 inches to 0.045 inches.

### Claim 18 (depends on 1)

The golf ball of claim 1, wherein the inner cover layer has a thickness of 0.025 inches to 0.035 inches.

### Claim 19 (depends on 1)

The golf ball of claim 1, wherein the core has an outer diameter of 1.5 inches to 1.6 inches.