GOLF BALLS INCORPORATING REGENERATING-TYPE MULTI-FUNCTIONAL ANTIOXIDANTS

• US 20170050086A1
• Filed: 11/09/2016
• Published: 02/23/2017
• Est. Priority Date: 09/13/2012
• Status: Active Grant

• Current Assignee: Acushnet Company (FILA Holdings Corp.)
• Original Assignee: Acushnet Company (FILA Holdings Corp.)
• Inventors: Sullivan, Michael J., Comeau, Brian, Michalewich, Michael
• Granted Patent: US 10,035,044 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A63B 37/0009 Polygonal
• CPC Class Codes: A63B 37/0012 Dimple profile, i.e. cross-sectional view
• CPC Class Codes: A63B 37/0018 Specified number of dimples
• CPC Class Codes: A63B 37/00221 characterised by the material
• CPC Class Codes: A63B 37/0031 Hardness
• CPC Class Codes: A63B 37/0033 Thickness
• CPC Class Codes: A63B 37/0039 characterised by the material
• CPC Class Codes: A63B 37/0043 Hardness
• CPC Class Codes: A63B 37/0045 Thickness
• CPC Class Codes: A63B 37/0051 Materials other than polybutadienes; Constructional details
• CPC Class Codes: A63B 37/00621 Centre hardness
• CPC Class Codes: A63B 37/00622 Surface hardness
• CPC Class Codes: A63B 37/0063 Hardness gradient
• CPC Class Codes: A63B 37/0064 Diameter
• CPC Class Codes: A63B 37/0065 Deflection or compression
• CPC Class Codes: A63B 37/0074 Two piece balls, i.e. cover and core
• CPC Class Codes: A63B 37/0075 Three piece balls, i.e. cover, intermediate layer and core
• CPC Class Codes: A63B 37/0076 Multi-piece balls, i.e. having two or more intermediate layers
• CPC Class Codes: A63B 45/00 Apparatus or methods for manufacturing balls working of plastics or substances in a plastic state B29
• CPC Class Codes: A63B 45/02 Marking of balls
• CPC Class Codes: C08G 18/10 : Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• CPC Class Codes: C08G 18/3868 : the sulfur atom belonging to a sulfide group
• CPC Class Codes: C08G 18/4854 : Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
• CPC Class Codes: C08G 18/7671 : containing only one alkylene bisphenyl group
• CPC Class Codes: C08L 2205/025 : containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
• CPC Class Codes: C08L 33/02 : Homopolymers or copolymers of acids; Metal or ammonium salts thereof
• CPC Class Codes: C09D 175/04 : Polyurethanes
• CPC Class Codes: C09D 175/08 : from polyethers

Abstract

Golf balls having at least one layer comprising a polymer composition comprising a reaction mixture of a base polymer and at least one regenerating-type multi-functional antioxidant. A regenerating-type multi-functional antioxidant has at least two differing moieties selected for example from the group consisting of phenols, phosphites, amines or combinations thereof, and is macromolecular, having a molecular weight of at least 2,000 g/mol. and up to 2,000,000. The at least one layer may comprise at least one regenerating-type multi-functional antioxidant in an amount of from 0.10 to about 2.5 parts by weight per 100 parts by weight of the base polymer, or of less than 0.50 parts by weight per 100 parts by weight of the base polymer, or of less than 0.095 parts by weight per 100 parts by weight of the base polymer. The base polymer can comprise ionomer resin composition(s), polyurethane composition(s) and/or rubber composition(s).

Claims

1. A golf ball having at least one layer comprising a polymer composition comprising a mixture of a base polymer and at least one regenerating-type multi-functional antioxidant.

2. The golf ball of claim 1, wherein the at least one regenerating-type multi-functional antioxidant has at least two differing moieties selected from the group consisting of phenols, phosphites, amines or combinations thereof.

3. The golf ball of claim 2, wherein each regenerating-type multi-functional antioxidant has a molecular weight of at least 2,000 g/mol.

4. The golf ball of claim 2, wherein each regenerating-type multi-functional antioxidant has a molecular weight of greater than 2,000 g/mol and less than about 10,000 g/mol.

5. The golf ball of claim 2, wherein each regenerating-type multi-functional antioxidant has a molecular weight of from 5,000 g/mol to about 100,000 g/mol.

6. The golf ball of claim 2, wherein each regenerating-type multi-functional antioxidant has a molecular weight of from 10,000 g/mol to about 2,000,000 g/mol.

7. The golf ball of claim 3, wherein the at least one layer comprises the at least one regenerating-type multi-functional antioxidant in an amount of from 0.10 parts by weight to about 2.5 parts by weight per 100 parts by weight of the base polymer.

8. The golf ball of claim 3, wherein the at least one layer comprises the at least one regenerating-type multi-functional antioxidant in an amount of less than 0.50 parts by weight per 100 parts by weight of the base polymer.

9. The golf ball of claim 3, wherein the at least one layer comprises the at least one regenerating-type multi-functional antioxidant in an amount of less than 0.095 parts by weight per 100 parts by weight of the base polymer.

10. The golf ball of claim 3, wherein the base polymer comprises an ionomer resin composition comprising at least one partially or fully neutralized ethylene-acid copolymer.

11. The golf ball of claim 10, wherein the at least one layer comprises an inner cover layer surrounding a subassembly, has a thickness of from about 0.020 inches to about 0.050 inches, and a Shore D hardness of from about 40 to about 75.

12. The golf ball of claims 10, wherein the polymer composition has a moisture vapor transmission rate in the range of from about 0.45 to about 0.95 grams.mm/m².day.

13. The golf ball of claim 3, wherein the base polymer comprises a thermoset polyurethane composition.

14. The golf ball of claim 13, wherein the polymer composition comprises a mixture of the at least one regenerating-type multi-functional antioxidant and a reaction mixture of at least one polyol and at least one isocyanate.

15. The golf ball of claim 13, wherein the polymer composition comprises a reaction mixture of a curing agent and a mixture of a prepolymer and the at least one regenerating-type multi-functional antioxidant.

16. The golf ball of claim 3, wherein the base polymer comprises:

100 phr of base rubber(s);

from about 0.1 phr to about 5.0 phr of initiator(s);

up to about 2.5 phr of organosulfur compound(s);

from about 5.0 phr to about 50.0 phr of co-agent(s);

up to about 50 phr of filler(s); and

up to about phr of additives(s).

17. 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 0.020 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 outer cover layer polyurethane composition comprises a reaction mixture of a prepolymer and a curing agent, wherein the prepolymer is a reaction mixture of a polyol mixture and a diisocyanate, wherein the polyol mixture comprises at least one regenerating-type multi-functional antioxidant; 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.

18. The golf ball of claim 17, wherein the at least one regenerating-type multi-functional antioxidant has at least two differing moieties selected from the group consisting of phenols, phosphites, or amines or combinations thereof.

19. The golf ball of claim 17, wherein each regenerating-type multi-functional antioxidant has a molecular weight of at least 2,000 g/mol.

20. The golf ball of claim 17, wherein each regenerating-type multi-functional antioxidant has a molecular weight of greater than 2,000 g/mol.

21. The golf ball of claim 17, wherein each regenerating-type multi-functional antioxidant has a molecular weight of at least 5,000 g/mol.

22. The golf ball of claim 19, wherein the outer cover layer polyurethane composition further comprises at least one UV absorber.

23. The golf ball of claim 22, wherein the UV absorber is a 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol UV absorber.

25. The golf ball of claim 23, wherein the at least one regenerating-type multi-functional antioxidant has at least two differing moieties selected from the group consisting of phenols, phosphites, or amines or combinations thereof.

26. The golf ball of claim 25, wherein each regenerating-type multi-functional antioxidant has a molecular weight of at least 2,000 g/mol.

27. The golf ball of claim 25, wherein each regenerating-type multi-functional antioxidant has a molecular weight of greater than 2,000 g/mol.

28. The golf ball of claim 26, wherein each regenerating-type multi-functional antioxidant has a molecular weight of at least 5,000 g/mol.

29. The golf ball of claim 25, wherein the outer cover layer polyurethane composition further comprises at least one UV absorber.

30. The golf ball of claim 29, wherein the UV absorber is a 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol UV absorber.

24. 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 0.020 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 outer cover layer polyurethane 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 at least one regenerating-type multi-functional antioxidant.