# US 10,441,851 B2 · Graphene core for a golf ball

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- Number: US 10,441,851 B2
- Document ID: US10441851B2
- Status: Granted
- Kind: B2
- Application number: 16/403,356
- Filed: 2019-05-03
- Published: 2019-08-22
- Granted: 2019-10-15
- Earliest claimed: 2016-09-28
- Assignees: Callaway Golf Company
- Applicants: Callaway Golf Company
- Inventors: Vijay Chavan; David Bartels
- Web page: https://patentgrep.com/patent/US10441851B2

## CPC

- A63B 37/0051: {Materials other than polybutadienes; Constructional details}
- A63B 37/0031: {Hardness}
- A63B 37/0033: {Thickness}
- A63B 37/0043: {Hardness}
- A63B 37/0045: {Thickness}
- A63B 37/0065: {Deflection or compression}
- A63B 37/0069: {Flexural modulus; Bending stiffness}
- A63B 37/0074: {Two piece balls, i.e. cover and core}
- A63B 37/0075: {Three piece balls, i.e. cover, intermediate layer and core}
- A63B 37/0076: {Multi-piece balls, i.e. having two or more intermediate layers}
- A63B 37/0092: {Hardness distribution amongst different ball layers}
- A63B 37/00922: {whereby hardness of the cover is lower than hardness of the intermediate layers}
- C01B 32/182: Graphene
- C08F 36/06: Butadiene
- C08K 3/042: {Graphene or derivatives, e.g. graphene oxides}
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A golf ball with a core comprising polybutadiene and graphene is disclosed herein. The golf ball has a single core comprising polybutadiene and graphene. Alternatively, the golf ball has a dual core with an inner core comprising polybutadiene and graphene. Alternatively, the golf ball has a dual core with an outer core comprising polybutadiene and graphene.

## Claims

### Claim 1

A golf ball comprising:
a dual core comprising an inner core and an outer core, the outer core comprising a polybutadiene in an amount ranging from 40 to 90 weight percent of the core, zinc diacrylate in an amount ranging from 10 to 50 weight percent of the core, Zinc oxide in an amount ranging from 1 to 30 weight percent of the core, zinc stearate in an amount ranging from 1 to 20 weight percent of the core, peroxide initiator in an amount ranging from 0.1 to 10 weight percent of the core, and a graphene material in an amount ranging from 0.1 to 5.0 weight percent of the core, wherein the core has a flexural modulus ranging from 80 MPa to 95 MPa;
a mantle layer disposed over the dual core; and
a cover layer disposed over the mantle layer;
wherein the dual core has a compression value ranging from 40 to 55.

### Claim 2 (depends on 1)

The golf ball according to claim 1 wherein the graphene material ranges from 0.4 to 2.5 weight percent of the outer core.

### Claim 3 (depends on 1)

The golf ball according to claim 1 wherein the graphene material ranges from 0.6 to 1.5 weight percent of the outer core.

### Claim 4 (depends on 1)

The golf ball according to claim 1 wherein the graphene material has a surface area ranging from 400 m2/g to 800 m2/g.

### Claim 5 (depends on 1)

The golf ball according to claim 1 wherein the graphene material has a surface area ranging from 15 m2/g to 50 m2/g.

### Claim 6 (depends on 1)

The golf ball according to claim 1 wherein the graphene material has a surface area ranging from 300 m2/g to 400 m2/g.

### Claim 7 (depends on 1)

The golf according to claim 1 wherein the cover is composed of a polyurethane material.

### Claim 8 (depends on 1)

The golf according to claim 1 wherein the cover is composed of an ionomer material.