Low compression, resilient golf balls including aromatic catalyst and method for making same
First Claim
1. A golf ball comprising a material formed from the conversion reaction of an amount of polybutadiene, a free radical source, and a cis-to-trans catalyst comprising at least one aromatic component which reaction occurs at a sufficient temperature to form a polybutadiene reaction product which comprises:
- an amount of trans-polybutadiene greater than the amount of trans-polybutadiene present before the conversion reaction; and
a cis-to-trans catalyst comprising the at least one aromatic component, wherein the aromatic component comprises the formula (R1)x—
R3—
M—
R4—
(R2)y, wherein R1 and R2 are each hydrogen or a substituted or unsubstituted C1-20 linear, branched, or cyclic alkyl, or alkoxy group, or a single, multiple, or fused ring C6 to C24 aromatic group;
x and y are each an integer from 0 to 5;
R3 and R4 are each selected from a single, multiple, or fused ring C6 to C24 aromatic group; and
M comprises at least one of an azo group or a metal component.
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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 aromatic component, and a free radical source. The reaction product typically 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 aromatic component and a free radical source. In particular, the use of various combinations of polybutadiene, cis-to-trans catalyst including at least one aromatic component, free radical source, filler, and crosslinker, produces golf balls and golf ball components that are resilient (fast) and have low compression (soft).
218 Citations
52 Claims
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1. A golf ball comprising a material formed from the conversion reaction of an amount of polybutadiene, a free radical source, and a cis-to-trans catalyst comprising at least one aromatic component which reaction occurs at a sufficient temperature to form a polybutadiene reaction product which comprises:
-
an amount of trans-polybutadiene greater than the amount of trans-polybutadiene present before the conversion reaction; and
a cis-to-trans catalyst comprising the at least one aromatic component, wherein the aromatic component comprises the formula (R1)x—
R3—
M—
R4—
(R2)y, wherein R1 and R2 are each hydrogen or a substituted or unsubstituted C1-20 linear, branched, or cyclic alkyl, or alkoxy group, or a single, multiple, or fused ring C6 to C24 aromatic group;
x and y are each an integer from 0 to 5;
R3 and R4 are each selected from a single, multiple, or fused ring C6 to C24 aromatic group; and
M comprises at least one of an azo group or a metal component.- 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)
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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20. The golf ball of claim 19, wherein the portion of the core having the reaction product is the center.
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21. The golf ball of claim 19, wherein a portion of the center comprises a fluid.
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22. The golf ball of claim 19 wherein the at least one intermediate layer comprises a wound layer of tensioned elastomeric material.
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23. The golf ball of claim 22, wherein the tensioned elastomeric material comprises the reaction product.
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24. The golf ball of claim 1, further comprising a density-modifying filler.
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25. A method for forming a golf ball which comprises:
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combining (a) a cis-to-trans catalyst comprising at least one aromatic component having the formula (R1)x—
R3—
M—
R4—
(R2)y;
(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 10 percent trans-polybutadiene and less than about 7 percent vinyl-polybutadiene; and
forming the second resilient polymer component into at least a portion of the golf ball, wherein R1 and R2 are each hydrogen or a substituted or unsubstituted C1-20 linear, branched, or cyclic alkyl, or alkoxy group, or a single, multiple, or fused ring C6 to C24 aromatic group;
x and y are each an integer from 0 to 5;
R3 and R4 are each selected from a single, multiple, or fused ring C6 to C24 aromatic group; and
M includes an azo group or a metal component.- View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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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48. The method of claim 47, wherein the converting and forming are substantially simultaneous.
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49. A golf ball 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 aromatic component having the formula (R1)x—
R3—
M—
R4—
(R2)y;
(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 resilient 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 in the second resilient polymer component is at least about 10 percent trans-polybutadiene and less than about 7 percent vinyl-polybutadiene; and
forming the second resilient polymer component into at least a portion of the golf ball, wherein R1 and R2 are each hydrogen or a substituted or unsubstituted C1-20 linear, branched, or cyclic alkyl, or alkoxy group, or a single, multiple, or fused ring C6 to C24 aromatic group;
x and y are each an integer from 0 to 5;
R3 and R4 are each selected from a single, multiple, or fused ring C6 to C24 aromatic group; and
M includes an azo group or a metal component.
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50. A golf ball comprising 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 aromatic component having the formula (R1)x—
- R3—
M—
R4—
(R2)y, which reaction occurs at a sufficient temperature to form a polybutadiene reaction product which comprises;an amount of trans-polybutadiene greater than the amount of trans-polybutadiene present before the conversion reaction; and
a cis-to-trans catalyst comprising the at least one aromatic 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 and wherein R1 and R2 are hydrogen or a substituted or unsubstituted C1-20 linear, branched, or cyclic alkyl, or alkoxy, group, or a single, multiple, or fused ring C6 to C24 aromatic group;
x and y are each an integer from 0 to 5;
R3 and R4 are each selected from a single, multiple, or fused ring C6 to C24 aromatic group; and
M includes an azo group or a metal component.
- R3—
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51. A method for forming a golf ball which comprises:
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combining (a) a cis-to-trans catalyst comprising at least one aromatic component having the formula (R1)x—
R3—
M—
R4—
(R2)y;
(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 10 percent trans-polybutadiene and less than about 7 percent vinyl-polybutadiene; and
forming the second resilient polymer component into at least a portion of the golf ball, wherein the second resilient component 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 and wherein R1 and R2 arc each hydrogen or a substituted or unsubstituted C1-20 linear, branched, or cyclic alkyl, or alkoxy group, or a single, multiple, or fused ring C6 to C24 aromatic group;
x and y are each an integer from 0 to 5;
R3 and R4 are each selected from a single, multiple, or fused ring C6 to C24, aromatic group; and
M includes an azo group or a metal component.
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52. A method for forming a golf ball which comprises:
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combining (a) a cis-to-trans catalyst comprising at least one aromatic component having the formula (R1)x—
R3—
M—
R4—
(R2)y;
(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 10 percent trans-polybutadiene and less than about 7 percent vinyl-polybutadiene; and
forming the second resilient polymer component into at least a portion of the golf ball, wherein the second resilient component 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., wherein R1 and R2 are each hydrogen or a substituted or unsubstituted C1-20 linear, branched, or cyclic alkyl, or alkoxy group, or a single, multiple, or fused ring C6 to C24 aromatic group;
x and y are each an integer from 0 to 5;
R3 and R4 are each selected from a single, multiple, or fused ring C6 to C24 aromatic group; and
M includes an azo group or a metal component.
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Specification