Low compression, resilient golf balls including an organosulfur catalyst and method for making same
First Claim
1. A golf ball having a cover disposed about a core, wherein the golf ball comprises a material formed from the conversion reaction of a sufficient amount of polybutadiene, a free radical source, and a cis-to-trans catalyst comprising at least one organosulfur component, wherein the reaction occurs at a sufficient temperature to form a polybutadiene reaction product, wherein the golf ball comprises:
- at least about 32 percent trans-polybutadiene after the conversion reaction, wherein the amount of trans-polybutadiene after the conversion reaction is greater than the amount of trans-polybutadiene present before the conversion reaction; and
a cis-to-trans catalyst comprising at least one organosulfur component, wherein the reaction product comprises a sphere which has a midpoint having a first hardness and a surface having a second hardness such that the second hardness differs from the first hardness by greater than 10 percent of the first hardness.
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Accused Products
Abstract
A low compression, resilient golf ball having a center and a cover, made from a polybutadiene reaction product having polybutadiene, a cis-to-trans catalyst including an organosulfur component, and a free radical source. The reaction product has a first dynamic stiffness measured at −50° C. that is less than about 130 percent of a second dynamic stiffness measured at 0° C. A multi-layer golf ball having a center, at least one intermediate layer disposed concentrically about the center, and a cover. At least a portion of at least one of the center, intermediate layer, or both, are made from a reaction product including polybutadiene having a cis-to-trans catalyst that includes at least one organosulfur component and a free radical source. The reaction product has a first dynamic stiffness measured at −50° C. that is less than about 130 percent of a second dynamic stiffness measured at 0° C. Addition of various combinations of polybutadiene, cis-to-trans catalyst including at least one organosulfur component, free radical source, filler, and crosslinker, produce golf balls and golf ball components that are resilient (fast) and have low compression (soft).
157 Citations
62 Claims
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1. A golf ball having a cover disposed about a core, wherein the golf ball comprises a material formed from the conversion reaction of a sufficient amount of polybutadiene, a free radical source, and a cis-to-trans catalyst comprising at least one organosulfur component, wherein the reaction occurs at a sufficient temperature to form a polybutadiene reaction product, wherein the golf ball comprises:
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at least about 32 percent trans-polybutadiene after the conversion reaction, wherein the amount of trans-polybutadiene after the conversion reaction is greater than the amount of trans-polybutadiene present before the conversion reaction; and
a cis-to-trans catalyst comprising at least one organosulfur component, wherein the reaction product comprises a sphere which has a midpoint having a first hardness and a surface having a second hardness such that the second hardness differs from the first hardness by greater than 10 percent of the first hardness. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
a core comprising a center and at least one intermediate layer; and
a cover disposed concentrically about the core, wherein the reaction product is disposed in a portion of the core.
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19. The golf ball of claim 18, wherein the portion of the core having the reaction product is the center.
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20. The golf ball of claim 18, wherein a portion of the center comprises a fluid.
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21. The golf ball of claim 18 wherein the at least one intermediate layer comprises a wound layer of tensioned elastomeric material.
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22. The golf ball of claim 21, wherein the tensioned elastomeric material comprises the reaction product.
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23. The golf ball of claim 1, further comprising a density-modifying filler.
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24. The golf ball of claim 1, wherein the material further comprises one or more metallic salts of unsaturated fatty acids or monocarboxylic acids.
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25. The golf ball of claim 24, wherein the metallic salts are selected from the group consisting of zinc acrylate, zinc diacrylate, zinc methacrylate, zinc dimethacrylate, and mixtures thereof.
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26. A method for forming a golf ball having a cover disposed about a core, comprising the steps of;
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combining (a) a cis-to-trans catalyst comprising at least one organosulfur component;
(b) a free radical source; and
(c) a first resilient polymer component comprising a cis-polybutadiene component present in an amount greater than about 70 percent of the total polymer component;
converting a portion of the first resilient polymer component to a second resilient polymer component in about 5 to 18 minutes at a sufficient temperature to convert at least a portion of the cis-polybutadiene component to a trans-polybutadiene component and wherein the polybutadiene in the second resilient polymer component is at least about 32 percent trans-polybutadiene and less than about 7 percent vinyl-polybutadiene; and
forming a mixture of the first resilient polymer component and the second resilient polymer component into at least a portion of the golf ball. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
a single-step compression molding of the first resilient polymer component to convert the first resilient polymer component to the second resilient polymer in about 8 to 15 minutes; and
forming the second resilient polymer component into a solid sphere.
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49. The method of claim 48, wherein the converting and forming are substantially simultaneous.
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50. The golf ball of claim 26, further combining:
(d) one or more metallic salts of unsaturated fatty acids or monocarboxylic acids in an amount sufficient to crosslink a portion of the first resilient polymer component.
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51. A golf ball having a core with at least two layers and a cover having at least two layers disposed about the core, wherein the golf ball comprises a material formed from the conversion reaction of a sufficient amount of polybutadiene, a free radical source, and a cis-to-trans catalyst comprising at least one organosulfur component, wherein the reaction occurs at a sufficient temperature to form a polybutadiene reaction product, wherein the golf ball comprises:
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at least about 32 percent trans-polybutadiene after the conversion reaction, wherein the amount of trans-polybutadiene after the conversion reaction is greater than the amount of trans-polybutadiene present before the conversion reaction; and
a cis-to-trans catalyst comprising at least one organosulfur component, wherein the reaction product courses a sphere which has a midpoint having a first hardness and a surface having a second hardness such that the second hardness differs from the first hardness by greater than 10 percent of the first hardness. - View Dependent Claims (52)
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53. A golf ball having a cover disposed about a core, wherein the golf ball is prepared by a process which comprises:
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combining (a) at least one of a cis-to-trans catalyst comprising at least one organosulfur component;
(b) a free radical source; and
(c) a first resilient polymer component comprising a cis-polybutadiene component present in an amount greater than about 70 percent of the total polymer component;
converting a portion of the first resilient polymer component to a second resilient polymer component in about 5 to 18 minutes, wherein at least a portion of the cis-isomer content is converted to a trans-isomer content and wherein the polybutadiene component in the second resilient polymer component is at least about 32 percent trans-polybutadiene and less than about 7 percent vinyl-polybutadiene; and
forming a mixture of the first resilient polymer component and the second resilient polymer component into at least a portion of the golf ball. - View Dependent Claims (54)
(d) one or more metallic salts of unsaturated fatty acids or monocarboxylic acids in an amount sufficient to crosslink a portion of the first resilient polymer component.
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55. A golf ball having a cover disposed about a core, wherein the golf ball comprises a material formed from the conversion reaction of a sufficient amount of polybutadiene, a free radical source, and a cis-to-trans catalyst comprising at least one organosulfur component, wherein the reaction occurs at a sufficient temperature to form a polybutadiene reaction product, wherein the golf ball comprises:
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at least about 32 percent trans-polybutadiene after the conversion reaction, wherein the amount of trans-polybutadiene after the conversion reaction is greater than the amount of trans-polybutadiene present before the conversion reaction; and
a cis-to-trans catalyst comprising at least one organosulfur component, wherein the reaction product has a fist dynamic stiffness measured at −
50°
C. that is less than about 130 percent of a second dynamic stiffness measured at 0°
C.- View Dependent Claims (56)
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57. A method for forming a golf ball having a cover disposed about a core, wherein the method comprises:
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combining (a) a cis-to-trans catalyst comprising at least one organosulfur component;
(b) a free radical source; and
(c) a first resilient polymer component comprising a cis-polybutadiene component present in an amount greater than about 70 percent of the total polymer component;
converting a portion of the first resilient polymer component to a second resilient polymer component in about 5 to 18 minutes at a sufficient temperature to convert at least a portion of the cis-polybutadiene component to a trans-polybutadiene component and wherein the polybutadiene in the second resilient polymer component is at least about 32 percent trans-polybutadiene and less than about 7 percent vinyl-polybutadiene; and
forming a mixture of the first resilient polymer component and the second resilient polymer component into at least a portion of the golf ball, wherein the mixture comprises a sphere which has a midpoint having a first hardness and a surface having a second hardness such that the second hardness differs from the first hardness by greater than 10 percent of the first hardness. - View Dependent Claims (58)
(d) one or more metallic salts of unsaturated fatty acids or monocarboxylic acids in an amount sufficient to crosslink a portion of the first resilient polymer component.
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59. A method for forming a golf ball having a cover disposed about a core, wherein the method comprises:
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combining (a) a cis-to-trans catalyst comprising at least one organosulfur component;
(b) a free radical source; and
(c) a first resilient polymer component comprising a cis-polybutadiene component present in an amount greater than about 70 percent of the total polymer component;
converting a portion of the first resilient polymer component to a second resilient polymer component in about 5 to 18 minutes at a sufficient temperature to convert at least a portion of the cis-polybutadiene component to a trans-polybutadiene component and wherein the polybutadiene in the second resilient polymer component is at least about 32 percent trans-polybutadiene and less than about 7 percent vinyl-polybutadiene; and
forming a mixture of the first resilient polymer component and the second resilient polymer component into at least a portion of the golf ball, wherein the mixture has a first dynamic stiffness measured at −
50°
C. that is less than about 130 percent of a second dynamic stiffness measured at 0°
C.- View Dependent Claims (60)
(d) one or more metallic salts of unsaturated fatty acids or monocarboxylic acids in an amount sufficient to crosslink a portion of the first resilient polymer component.
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61. A golf ball comprising a material formed from a conversion reaction of a sufficient amount of polybutadiene, a free radical source, and a cis-to-trans catalyst comprising at least one organosulfur component, wherein the reaction occurs at a sufficient temperature to form a polybutadiene reaction product, wherein the golf ball comprises:
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at least about 32 percent trans-polybutadiene after the conversion reaction, wherein the amount of trans-polybutadiene after the conversion reaction is greater than the amount of trans-polybutadiene present before the conversion reaction; and
a cis-to-trans catalyst comprising at least one organosulfur component, wherein the reaction product comprises a sphere which has a midpoint having a dynamic stiffness of less than 30,000 N/m2 measured at 0°
C.- View Dependent Claims (62)
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Specification