Golf ball compositions formed from single site catalyzed polymers

• US 6,150,462 A
• Filed: 12/21/1998
• Issued: 11/21/2000
• Est. Priority Date: 01/24/1995
• Status: Expired due to Term

• Current Assignee: Acushnet Company (FILA Holdings Corp.)
• Original Assignee: Acushnet Company (FILA Holdings Corp.)
• Inventors: Rajagopalan, Murali, Harris, Kevin M.
• Primary Examiner(s): Buttner, David J.
• Application Number:
  US09/217,703
• Time in Patent Office: 701 Days
• Field of Search: 525/72, 525/74, 525/221, 525/274, 525/285, 473/354, 473/355, 473/365, 473/372, 473/373, 473/374, 473/377, 473/378, 473/385
• US Class Current: 525/74
• CPC Class Codes: A63B 37/0003 Golf balls
• CPC Class Codes: A63B 37/0031 Hardness
• CPC Class Codes: A63B 37/0033 Thickness
• CPC Class Codes: A63B 37/0034 Deflection or compression
• CPC Class Codes: A63B 37/0037 Flexural modulus; Bending stiffness
• CPC Class Codes: A63B 37/0047 Density; Specific gravity
• CPC Class Codes: A63B 37/0052 Liquid cores
• CPC Class Codes: A63B 37/0053 Thread wound
• CPC Class Codes: A63B 37/0056 Hollow; Gas-filled
• CPC Class Codes: A63B 37/0064 Diameter
• CPC Class Codes: A63B 37/0065 Deflection or compression
• CPC Class Codes: A63B 37/0075 Three piece balls, i.e. cover, intermediate layer and core
• CPC Class Codes: A63B 37/04 Rigid cores
• CPC Class Codes: A63B 37/12 Special coverings , i.e. outer layer material balls with finger holes A63B37/0001, golf ball covers A63B37/0023
• CPC Class Codes: C08F 222/06 Maleic anhydride
• CPC Class Codes: C08F 255/00 Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
• CPC Class Codes: C08F 8/00 Chemical modification by after-treatment graft polymers, block polymers, crosslinking with unsaturated monomers or with polymers C08F251/00 - C08F299/00; of conjugated diene rubbers C08C
• CPC Class Codes: C08L 23/08 Copolymers of ethene C08L23/16 takes precedence
• CPC Class Codes: C08L 23/0815 Copolymers of ethene with aliphatic 1-olefins
• CPC Class Codes: C08L 23/0876 Neutralised polymers, i.e. ionomers
• CPC Class Codes: C08L 23/10 : Homopolymers or copolymers of propene
• CPC Class Codes: C08L 23/26 : modified by chemical after-treatment
• CPC Class Codes: C08L 2314/06 : Metallocene or single site catalysts
• CPC Class Codes: C08L 2666/02 : Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/04 : Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 51/06 : grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• CPC Class Codes: H04B 1/005 : adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
• CPC Class Codes: H04B 1/006 : using switches for selecting the desired band H04B1/0057 takes precedence

Abstract

Golf ball compositions, which contain olefinic polymers produced by use of single-site catalysts. Such polymers can be functionalized with a post-polymerization reaction. The single-site catalyzed polymers may be blended with ionomers, other grafted or non-grafted single-site catalyzed polymers, thermoplastics, non-single-site polymers, or other non-ionomeric polymers. The compositions can be foamed or unfoamed. Golf balls that employ at least one layer of these compositions in any of the golf ball cover, core, or a mantle situated between the cover and the core provide ball properties and performance similar to and in some cases better than the state of the art ionomer based golf balls.

Claims

1. A golf ball comprising a cover having a thickness of at least about 0.03 inch and at least about 60 percent dimple coverage, a core having a PGA compression of at least about 40, and, optionally, a mantle situated between the cover and the core, wherein at least one of the cover, the core, and the mantle comprises at least one layer formed of a single-site catalyzed polymer blend comprising from about 1 to about 100 phr of at least one non-metallocene single-site catalyzed polymer having a hardness of at least about 15 Shore A, a flexural modulus of at least about 500 psi, a specific gravity of at least about 0.7, a dynamic shear storage modulus at 23°

C. of at least about 104 dynes/Cm², and a loss tangent of no more than about 1, and from about 99 to 0 phr of at least one ionomer, non-ionomeric polymer, thermoset polymer, thermoplastic, or non-single-site catalyzed polymer, having a flexural modulus of at least about 500 psi, wherein the golf ball has a PGA compression of at least about 50.

2. The golf ball of claim 1, wherein the cover has a thickness of from about 0.03 to about 0.125 inch and at least about 70 percent dimple coverage;

the core has a diameter of from about 0.5 to about 1.6 inches and a PGA compression of from about 40 to about 90; and

the ball has a PGA compression of from about 60 to about 120.

3. The golf ball of claim 1, wherein at least one layer in at least one of the cover, the core, or the mantle further comprises a density adjusting filler material.

4. The golf ball of claim 1, wherein the layer forms at least a portion of the cover, and the cover has a hardness of from about 40 to about 70 Shore D.

5. The golf ball of claim 1, wherein the layer forms at least a portion of the core.

6. The golf ball of claim 1, wherein the core is a wound core, having a solid, gas filled, liquid filled, or hollow center, and the center has a diameter of at least about 0.5 inch.

7. The golf ball of claim 1, wherein the mantle layer is present, and the mantle layer has a thickness of at least about 0.02 inch, and the core has a diameter of less than about 1.6 inches.

8. The golf ball of claim 7, wherein the mantle is formed from a wound elastomeric layer.

9. The golf ball of claim 7, wherein the layer forms at least a portion of the mantle, and the mantle layer has a thickness of from about 0.02 to about 0.125 inch and a hardness of at least about 15 Shore D.

10. The golf ball of claim 1, wherein at least one of the cover, the core, or the optional mantle has a foamed structure.

11. A golf ball having at least one layer, wherein said layer comprises at least one non-metallocene single-site catalyzed polymer having a hardness of at least about 15 Shore A, a flexural modulus of at least about 500 psi, a specific gravity of at least about 0.7, a dynamic shear storage modulus at 23°

C. of at least about 104 dynes/cm², and a loss tangent of no more than about 1.

12. The golf ball of claim 11, wherein the single-site catalyzed polymer has a hardness of from about 50 Shore A to about 80 Shore D, a flexural modulus of from about 1,000 to about 100,000 psi, a specific gravity of from about 0.75 to about 1, a dynamic shear storage modulus at 23°

C. of about 10⁶ to about 10¹⁰ dynes/cm², and a loss tangent of no more than about 0.1.

13. The golf ball of claim 11, further comprising at least one of an ionomer, a non-ionomeric polymer, a thermoset polymer, a thermoplastic, or a non-single-site polymer, having a flexural modulus of at least about 500 psi blended with the at least one single-site catalyzed polymer.

14. The golf ball of claim 11, wherein the layer further comprises at least one of a density increasing filler or a density decreasing filler.

15. The golf ball of claim 11, wherein the layer has a foamed structure.

16. The golf ball of claim 11, comprising a cover, a core, and, optionally, a mantle layer situated between the cover and the core, wherein the layer forms at least a portion of at least one of the cover, the core, or the mantle.

17. The golf ball of claim 16, wherein the core comprises a gas filled, liquid filled, solid, or hollow center.

18. The golf ball of claim 11, wherein the at least one layer of the golf ball is formed from a composition comprising at least one single-site catalyzed polymer that has been functionalized by sulfonation, carboxylation, addition of an amine or hydroxy, or by grafting an ethylenically unsaturated monomer onto the at least one single-site catalyzed polymer using a post-polymerization reaction.

19. The golf ball of claim 18, wherein the ethylenically unsaturated monomer is an olefinic monomer having a functional group selected from the group consisting of sulfonic acid, sulfonic acid derivatives, chlorosulfonic acid, vinyl ethers, vinyl esters, primary amines, secondary amines, tertiary amines, epoxies, isocyanates, mono-carboxylic acids, dicarboxylic acids, partially or fully ester derivatized mono-carboxylic acids, partially or fully ester derivatized dicarboxylic acids, anhydrides of dicarboxylic acids, cyclic imides of dicarboxylic acids, epoxies, isocyanates, and ionomeric derivatives thereof.

20. The golf ball of claim 18, wherein the ethylenically unsaturated monomer is maleic anhydride.

21. The golf ball of claim 11, wherein the single-site catalyzed polymer is of the formula:

##STR25## wherein R₁ is hydrogen;

R₂ is hydrogen or lower alkyl selected from the group consisting of CH₃, C₂ H₅, C₃ H₇, C₄ H₉, and C₅ H₁₁ ;

R₃ is hydrogen or lower alkyl selected from the group consisting of CH³, C₂ H₅, C₃ H₇, C₄ H₉, and C₅ H₁₁ ;

R₄ is selected from the group consisting of H, CH₃, C₂ H₅, C₃ H₇, C₄ H₉, C₅ H₁₁, C₆ H₁₃, C₇ H₁₅, C₈ H₁₇, C₉ H₁₉, C₁₀ H₂₁, and phenyl, in which from 0 to 5 H within R₄ can be replaced by substituents selected from the group consisting of COOH, SO₃ H, NH₂, F, Cl, Br, I, OH, SH, epoxy, isocyanate, silicone, lower alkyl esters and lower alkyl ethers, with the proviso that R₃ and R₄ can be combined to form a bicyclic ring;

R₅ is hydrogen, lower alkyl including C₁ -C₅, carbocyclic, aromatic or heterocyclic;

R₆ is hydrogen, lower alkyl including C₁ -C₅, carbocyclic, aromatic or heterocyclic; and

wherein x ranges from 100 to 50 weight per cent of the polymer, y ranges from 0 to 50 weight per cent of the polymer and z ranges from 0 to 49 weight per cent of the polymer.

22. The golf ball of claim 21, wherein the single-site catalyzed polymer is a grafted single-site catalyzed polymer comprising an ethylenically unsaturated monomer grafted onto the single-site catalyzed polymer.

23. The golf ball of claim 22, wherein the ethylenically unsaturated monomer is an olefinic monomer having a functional group selected from the group consisting of sulfonic acid, sulfonic acid derivatives, chlorosulfonic acid, vinyl ethers, vinyl esters, primary amines, secondary amines, tertiary amines, epoxies, isocyanates, mono-carboxylic acids, dicarboxylic acids, partially or fully ester derivatized mono-carboxylic acids, partially or fully ester derivatized dicarboxylic acids, anhydrides of dicarboxylic acids, cyclic imides of dicarboxylic acids, and ionomeric derivatives thereof.

24. The golf ball of claim 23, wherein the ethylenically unsaturated monomer is maleic anhydride.

25. A golf ball comprising a cover, a core, and a mantle situated between the cover and the core, wherein at least one of the cover, the core, and the mantle comprises at least one layer formed of a single-site catalyzed polymer blend comprising from about 1 to about 100 phr of at least one non-metallocene single-site catalyzed polymer having a hardness of at least about 15 Shore A, a flexural modulus of at least about 500 psi, and a specific gravity of at least about 0.7, a dynamic shear storage modulus at 23°

C. of at least about 104 dynes/cm², a loss tangent of no more than about 1, and from about 99 to 0 phr of at least one ionomer having a flexural modulus of at least about 500 psi.

26. The golf ball of claim 25, wherein the layer has a foamed structure.

27. The golf ball of claim 25, wherein the single-site catalyzed polymer is of the formula:

##STR26## wherein R₁ is hydrogen;

R₂ is hydrogen or lower alkyl selected from the group consisting of CH₃, C₂ H₅, C₃ H₇, C₄ H₉, and C₅ H₁₁ ;

R₃ is hydrogen or lower alkyl selected from the group consisting of CH₃, C₂ H₅, C₃ H₇, C₄ H₉, and C₅ H₁₁ ;

R₄ is selected from the group consisting of H, CH₃, C₂ H₅, C₃ H₇, C₄ H₉, C₅ H₁₁, C₆ H₁₃, C₇ H₁₅, C⁸ H₁₇, C₉ H₁₉, C₁₀ H₂₁, and phenyl, in which from 0 to 5 H within R₄ can be replaced by substituents selected from the group consisting of COOH, SO₃ H, NH₂, F, Cl, Br, I, OH, SH, epoxy, isocyanate, silicone, lower alkyl esters and lower alkyl ethers, with the proviso that R₃ and R₄ can be combined to form a bicyclic ring;

R₅ is hydrogen, lower alkyl including C₁ -C₅, carbocyclic, aromatic or heterocyclic;

R₆ is hydrogen, lower alkyl including C₁ -C₅, carbocyclic, aromatic or heterocyclic; and

wherein x ranges from 100 to 50 weight per cent of the polymer, y ranges from 0 to 50 weight per cent of the polymer and z ranges from 0 to 49 weight per cent of the polymer.

28. The golf ball of claim 25, wherein at least one of the cover, the core and the mantle comprises at least one layer, the layer formed from a composition comprising at least one single-site catalyzed polymer that has been functionalized by sulfonation, carboxylation, addition of an amine or hydroxy, or by grafting an ethylenically unsaturated monomer onto the single-site catalyzed polymer using a post-polymerization reaction.

29. The golf ball of claim 28, wherein the ethylenically unsaturated monomer is maleic anhydride.

30. The golf ball of claim 28, wherein the layer comprises the functionalized single-site catalyzed polymer has a foamed structure.

31. The golf ball of claim 29, wherein the ethylenically unsaturated monomer is an olefinic monomer having a functional group selected from the group consisting of sulfonic acid, sulfonic acid derivatives, chlorosulfonic acid, vinyl ethers, vinyl esters, primary amines, secondary amines, tertiary amines, epoxies, isocyanates, mono-carboxylic acids, dicarboxylic acids, partially or fully ester derivatized mono-carboxylic acids, partially or fully ester derivatized dicarboxylic acids, anhydrides of dicarboxylic acids, cyclic imides of dicarboxylic acids, and ionomeric derivatives thereof.

32. The golf ball of claim 25, wherein the layer further comprises at least one of a density increasing filler or a density decreasing filler.

33. A golf ball comprising a cover having a thickness of at least about 0.03 inch and at least about 60 percent dimple coverage, a core having a PGA compression of at least about 40, and, optionally, a mantle situated between the cover and the core, wherein at least one of the cover, the core, and the mantle comprises at least one layer, the layer formed of a single-site catalyzed polymer blend, comprising from about 1 to about 100 phr of at least one single-site catalyzed polymer that has been functionalized by grafting an ethylenically unsaturated monomer thereon using a post-polymerization reaction and that has a hardness of at least about 15 Shore A, a flexural modulus of at least about 500 psi, a specific gravity of at least about 0.7, a dynamic shear storage modulus at 23°

C. of at least about 104 dynes/cm², and a loss tangent of no more than about 1, and from about 99 to 0 phr of at least one ionomer, non-ionomeric polymer, thermoset polymer, thermoplastic, or non-single-site catalyzed polymer, having a flexural modulus of at least about 500 psi, wherein the golf ball has a PGA compression of at least about 50.

34. The golf ball of claim 33, wherein the cover has a thickness of from about 0.03 to about 0.125 inch and at least about 70 percent dimple coverage;

the core has a diameter of from about 0.5 to about 1.6 inches and a PGA compression of from about 40 to about 90; and

the ball has a PGA compression of from about 60 to about 120.

35. The golf ball of claim 33, wherein at least one layer in at least one of the cover, the core, or the mantle further comprises a density adjusting filler material.

36. The golf ball of claim 33, wherein the layer forms at least a portion of the cover, and the cover has a hardness of from about 40 to about 70 Shore D.

37. The golf ball of claim 33, wherein the layer forms at least a portion of the core.

38. The golf ball of claim 33, wherein the core is a wound core, having a solid, gas filled, liquid filled, or hollow center, and the center has a diameter of at least about 0.5.

39. The golf ball of claim 33, wherein the mantle layer is present, and the mantle layer has a thickness of at least about 0.02 inch, and the core has a diameter of less than about 1.6 inches.

40. The golf ball of claim 39, wherein the mantle is formed from a wound elastomeric layer.

41. The golf ball of claim 39, wherein the layer forms at least a portion of the mantle, and the mantle layer has a thickness of from about 0.02 to about 0.125 inch and a hardness of at least about 15 Shore D.

42. The golf ball of claim 33, wherein at least one of the cover, the core, or the optional mantle has a foamed structure.

43. A golf ball having at least one layer, wherein said layer comprises at least one single-site catalyzed polymer that has been functionalized by grafting an ethylenically unsaturated monomer thereon using a post-polymerization reaction having a hardness of at least about 15 Shore A, a flexural modulus of at least about 500 psi, a specific gravity of at least about 0.7, a dynamic shear storage modulus at 23 C. of at least about 104 dynes/cm², and a loss tangent of no more than about 1.

44. The golf ball of claim 43, wherein the single-site catalyzed polymer has a hardness of from about 50 Shore A to about 80 Shore D, a flexural modulus of from about 1,000 to about 100,000 psi, a specific gravity of from about 0.75 to about 1, a dynamic shear storage modulus at 23 C. of about 106 to about 1010 dynes/cm², and a loss tangent of no more than about 0.1.

45. The golf ball of claim 43, further comprising at least one of an ionomer, a non-ionomeric polymer, a thermoset polymer, a thermoplastic, or a non-single-site polymer, having a flexural modulus of at least about 500 psi blended with the at least one single-site catalyzed polymer.

46. The golf ball of claim 43, wherein the layer further comprises at least one of a density increasing filler or a density decreasing filler.

47. The golf ball of claim 43, wherein the layer has a foamed structure.

48. The golf ball of claim 43, comprising a cover, a core, and, optionally, a mantle layer situated between the cover and the core, wherein the layer forms at least a portion of at least one of the cover, the core, or the mantle.

49. The golf ball of claim 48, wherein the core comprises a gas filled, liquid filled, solid, or hollow center.

50. The golf ball of claim 43, wherein the single-site catalyzed polymer is a non-metallocene single-site catalyzed polymer.

51. The golf ball of claim 43, wherein the at least one layer of the golf ball is formed from a composition comprising at least one single-site catalyzed polymer that has been functionalized by sulfonation, carboxylation, or addition of an amine or hydroxy using a post-polymerization reaction.

52. The golf ball of claim 43, wherein the ethylenically unsaturated monomer is an olefinic monomer having a functional group selected from the group consisting of sulfonic acid, sulfonic acid derivatives, chlorosulfonic acid, vinyl ethers, vinyl esters, primary amines, secondary amines, tertiary amines, epoxies, isocyanates, mono-carboxylic acids, dicarboxylic acids, partially or fully ester derivatized mono-carboxylic acids, partially or fully ester derivatized dicarboxylic acids, anhydrides of dicarboxylic acids, cyclic imides of dicarboxylic acids, epoxies, isocyanates, and ionomeric derivatives thereof.

53. The golf ball of claim 43, wherein the ethylenically unsaturated monomer is maleic anhydride.

54. The golf ball of claim 43, wherein the single-site catalyzed polymer is a non-metallocene single-site catalyzed polymer.

55. The golf ball of claim 43, wherein the single-site catalyzed polymer is of the formula:

##STR27## wherein R₁ is hydrogen;

R₂ is hydrogen or lower alkyl selected from the group consisting of CH₃, C₂ H₅, C₃ H₇, C₄ H₉, and C₅ H₁₁ ;

R₃ is hydrogen or lower alkyl selected from the group consisting of CH₃, C₂ H₅, C₃ H₇, C₄ H₉, and C₅ H₁₁ ;

R₄ is selected from the group consisting of H, CH₃, C₂ H₅, C₃ H₇, C₄ H₉, C₅ H₁₁, C₆ H₁₃, C₇ H₁₅, C₈ H₁₇, C₉ H₁₉, C₁₀ H₂₁, and phenyl, in which from 0 to 5 H within R₄ can be replaced by substituents selected from the group consisting of COOH, SO₃ H, NH2, F, Cl, Br, I, OH, SH, epoxy, isocyanate, silicone, lower alkyl esters and lower alkyl ethers, with the proviso that R₃ and R₄ can be combined to form a bicyclic ring;

R₅ is hydrogen, lower alkyl including C₁ -C₅, carbocyclic, aromatic or heterocyclic;

R₆ is hydrogen, lower alkyl including C₁ -C₅, carbocyclic, aromatic or heterocyclic; and

wherein x ranges from 100 to 50 weight per cent of the polymer, y ranges from 0 to 50 weight percent of the polymer and z ranges from 0 to 49 weight per cent of the polymer.

56. The golf ball of claim 55, wherein the ethylenically unsaturated monomer is an olefinic monomer having a functional group selected from the group consisting of sulfonic acid, sulfonic acid derivatives, chlorosulfonic acid, vinyl ethers, vinyl esters, primary amines, secondary amines, tertiary amines, epoxies, isocyanates, mono-carboxylic acids, dicarboxylic acids, partially or fully ester derivatized mono-carboxylic acids, partially or fully ester derivatized dicarboxylic acids, anhydrides of dicarboxylic acids, cyclic imides of dicarboxylic acids, and ionomeric derivatives thereof.

57. The golf ball of claim 56, wherein the ethylenically unsaturated monomer is maleic anhydride.

58. The golf ball of claim 56, wherein the single-site catalyzed polymer is a non-metallocene single-site catalyzed polymer.

59. A golf ball comprising a cover, a core, and a mantle situated between the cover and the core, wherein at least one of the cover, the core, and the mantle comprises at least one layer formed of a single-site catalyzed polymer blend comprising from about 1 to about 100 phr of at least one single-site catalyzed polymer having a hardness of at least about 15 Shore A, a flexural modulus of at least about 500 psi, and a specific gravity of at least about 0.7, a dynamic shear storage modulus at 23°

C. of at least about 104 dynes/cm², a loss tangent of no more than about 1, and from about 99 to 0 phr of at least one ionomer having a flexural modulus of at least about 500 psi, wherein the one single-site catalyzed polymer has been functionalized by grafting an ethylenically unsaturated monomer onto the single-site catalyzed polymer using a post-polymerization reaction.

60. The golf ball of claim 59, wherein the layer has a foamed structure.

61. The golf ball of claim 59, wherein the single-site catalyzed polymer is of the formula:

##STR28## wherein R₁ is hydrogen;

R₂ is hydrogen or lower alkyl selected from the group consisting of CH₃, C₂ H₅, C₃ H₇, C₄ H₉, and C₅ H₁₁ ;

R₃ is hydrogen or lower alkyl selected from the group consisting of CH₃, C₂ H₅, C₃ H₇, C₄ H₉, and C₅ H₁₁ ;

R₄ is selected from the group consisting of H, CH₃, C₂ H₅, C₃ H₇, C₄ H₉, C₅ H₁₁, C₆ H₁₃, C₇ H₁₅, C₈ H₁₇, C₉ H₁₉, C₁₀ H₂₁, and phenyl, in which from 0 to 5 H within R₄ can be replaced by substituents selected from the group consisting of COOH, SO₃ H, NH2, F, Cl, Br, I, OH, SH, epoxy, isocyanate, silicone, lower alkyl esters and lower alkyl ethers, with the proviso that R₃ and R₄ can be combined to form a bicyclic ring;

R₅ is hydrogen, lower alkyl including C₁ -C₅, carbocyclic, aromatic or heterocyclic;

R₆ is hydrogen, lower alkyl including C₁ -C₅, carbocyclic, aromatic or heterocyclic; and

wherein x ranges from 100 to 50 weight percent of the polymer, y ranges from 0 to 50 weight percent of the polymer and z ranges from 0 to 49 weight per cent of the polymer.

62. The golf ball of claim 59, wherein at least one of the cover, the core and the mantle comprises at least one layer formed from a composition comprising at least one single-site catalyzed polymer that has been functionalized by sulfonation, carboxylation, or addition of an amine or hydroxy.

63. The golf ball of claim 59, wherein the ethylenically unsaturated monomer is maleic anhydride.

64. The golf ball of claim 59, wherein the layer comprises a foamed structure.

65. The golf ball of claim 59, wherein the ethylenically unsaturated monomer is an olefinic monomer having a functional group selected from the group consisting of sulfonic acid, sulfonic acid derivatives, chlorosulfonic acid, vinyl ethers, vinyl esters, primary amines, secondary amines, tertiary amines, epoxies, isocyanates, mono-carboxylic acids, dicarboxylic acids, partially or fully ester derivatized mono-carboxylic acids, partially or fully ester derivatized dicarboxylic acids, anhydrides of dicarboxylic acids, cyclic imides of dicarboxylic acids, and ionomeric derivatives thereof.

66. The golf ball of claim 59, wherein the ethylenically unsaturated monomer is maleic anhydride.

67. The golf ball of claim 59, wherein the single-site catalyzed polymer is a non-metallocene single-site catalyzed polymer.

68. The golf ball of claim 59, wherein the layer further comprises at least one of a density increasing filler or a density decreasing filler.