Use of halogenated organosulfur and peroxide compounds in golf balls

• US 7,211,631 B2
• Filed: 09/12/2005
• Issued: 05/01/2007
• Est. Priority Date: 09/13/2001
• Status: Expired due to Term

• Current Assignee: Acushnet Company (FILA Holdings Corp.)
• Original Assignee: Acushnet Company (FILA Holdings Corp.)
• Inventors: Rajagopalan, Murali, Voorheis, Peter R.
• Primary Examiner(s): Buttner; David J.
• Application Number:
  US11/224,634
• Publication Number:
  US 20060014905A1
• Time in Patent Office: 596 Days
• Field of Search: None
• US Class Current: 525/274
• CPC Class Codes: A63B 37/0003 Golf balls
• CPC Class Codes: A63B 37/0024 Materials other than ionomers or polyurethane
• CPC Class Codes: A63B 37/0033 Thickness
• CPC Class Codes: A63B 37/0054 Substantially rigid, e.g. metal
• CPC Class Codes: A63B 37/0064 Diameter
• CPC Class Codes: A63B 37/0075 Three piece balls, i.e. cover, intermediate layer and core
• CPC Class Codes: A63B 37/008 Diameter

Abstract

A golf ball comprising:

• • a core comprising a polybutadiene rubber having a cis-content of greater than 90%, a crosslinking agent, and an initiator, the core having an ATTI compression of less than 20;
  • an inner cover layer comprising ethylene, from 5 weight % to 30 weight % of an α, β-ethylenically unsaturated carboxylic acid, and from 5 weight % to 25 weight % of a softening comonomer; and
  • a cover comprising ethylene and from 5 weight % to 35 weight % of an α, β-ethylenically unsaturated carboxylic acid;
  • wherein 100% of the carboxylic acid groups of the inner cover layer are neutralized.

Claims

1. A golf ball comprising:

a core comprising a polybutadiene rubber having a cis-content of greater than 90%, a crosslinking agent, and an initiator, the core having an Atti compression of less than 20;

an inner cover layer comprising ethylene, from 5 weight % to 30 weight % of an α

,β

-ethylenically unsaturated carboxylic acid, and from 5 weight % to 25 weight % of a softening comonomer; and

a cover comprising ethylene and from 5 weight % to 35 weight % of an α

,β

-ethylenically unsaturated carboxylic acid;

wherein 100% of the carboxylic acid groups of the inner cover layer are neutralized.

2. The golf ball of claim 1, wherein the core has an Atti compression of less than 10.

3. The golf ball of claim 2, wherein the core has an Atti compression of 0.

4. The golf ball of claim 1, wherein the softening comonomer comprises a C_1-8 alkyl acrylate.

5. The golf ball of claim 1, wherein the α

,β

ethylenically unsaturated carboxylic acid is present in the inner cover layer in an amount of from 10 weight % to 20 weight %.

6. The golf ball of claim 1, wherein the softening comonomer is present in the inner cover layer in an amount of from 10 weight % to 20 weight %.

7. The golf ball of claim 1, wherein the ethylene in the inner cover layer is present in an amount of from 85 weight % to 25 weight %.

8. The golf ball of claim 1, wherein the α

,β

-ethylenically unsaturated carboxylic acid in the cover layer is present in an amount of from 8 weight % to 25 weight %.

9. The golf ball of claim 8, wherein the α

,β

-ethylenically unsaturated carboxylic acid in the cover layer is present in an amount of from 8 weight % to 20 weight %.

10. The golf ball of claim 1, wherein the cover layer is substantially free of a softening comonomer.

11. The golf ball of claim 1, wherein the ethylene in the cover layer is present in an amount of from 80 weight % to 92 weight %.

12. A golf ball comprising:

a core comprising a polybutadiene rubber having a cis-content of greater than 95%, a crosslinking agent, and an initiator, the core having an Atti compression of less than 10;

an inner cover layer comprising ethylene, from 10 weight % to 20 weight % of an α

,β

-ethylenically unsaturated carboxylic acid, and from 10 weight % to 20 weight % of a alkyl acrylate; and

a cover comprising ethylene and from 8 weight % to 25 weight % of an α

,β

-ethylenically unsaturated carboxylic acid;

wherein 100% of the carboxylic acid groups of the inner cover layer are neutralized.

13. A golf ball comprising:

a core comprising a polybutadiene rubber having a cis-content of greater than 95%, a crosslinking agent, and an initiator, the core having an Atti compression of 0;

an inner cover layer comprising ethylene, from 10 weight % to 20 weight % of an α

,β

-ethylenically unsaturated carboxylic acid, and from 10 weight % to 20 weight % of a C_1-8 alkyl acrylate; and

a cover comprising ethylene and from 8 weight % to 20 weight % of an α

,β

-ethylenically unsaturated carboxylic acid;

wherein 100% of the carboxylic acid groups of the inner cover layer are neutralized.