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Rubber compositions comprising benzoquinones and the use thereof in golf balls

a technology of benzoquinones and compositions, which is applied in the direction of golf balls, solid balls, sports equipment, etc., can solve the problem of high cost of organic sulfur compounds

Inactive Publication Date: 2007-09-13
ACUSHNET CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organosulfur compounds can be expensive and can cause processing difficulties.

Method used

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  • Rubber compositions comprising benzoquinones and the use thereof in golf balls
  • Rubber compositions comprising benzoquinones and the use thereof in golf balls
  • Rubber compositions comprising benzoquinones and the use thereof in golf balls

Examples

Experimental program
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Effect test

examples

[0053] It should be understood that the examples below are for illustrative purposes only. In no manner is the present invention limited to the specific disclosures therein.

[0054] Golf ball cores of the present invention were prepared by mixing materials according to the formulations given in the Tables below, and then molding and grinding the resulting compositions to obtain 1.55 inch diameter spheres. The compression and COR of each sphere was measured and compared to the compression and COR of comparative spheres to determine SFI. The results are given in the Tables below.

[0055] Compression, also referred to herein as “Atti compression,” is measured according to a known procedure, using an Atti compression test device, wherein a piston is used to compress a ball against a spring. The travel of the piston is fixed and the deflection of the spring is measured. The measurement of the deflection of the spring does not begin with its contact with the ball; rather, there is an offset...

examples 1-5

methyl p-benzoguinone as a Free Radical Scavenger

[0058] In Examples 1-5, rubber compositions of the present invention were prepared by mixing SE BR-1220, methyl p-benzoquinone, Perkadox® BC, SR526, zinc oxide, and barium sulfate, in a Brabender mixer for 5-10 minutes. Comparative compositions C1-C3 were similarly prepared, except that no benzoquinone was added. The relative amount of each component used is indicated in Table 1.

[0059] The rubber compositions of Examples 1-5 and C1-C3 were then cured in a compression molding press at 335° C. for 11 minutes to obtain spheres, which were subsequently ground to a diameter of 1.55 inches.

[0060] Each of the resulting spheres was evaluated for Atti compression and COR at 125 ft / sec. The SFI of each of Examples 1-5 was then determined by comparing the compression and COR of each Example with the compression and COR of C1-C3, according to the SFI procedure described above. The results for compression, COR, and SFI are reported in Table 1. ...

example 6

tetrachloro p-benzoguinone as a Free Radical Scavenger

[0061] In Example 6, a rubber composition of the present invention was prepared by mixing SE BR-1220, tetrachloro p-benzoquinone, Perkadox® BC, SR526, zinc oxide, and barium sulfate, in a Brabender mixer for 5-10 minutes. Comparative compositions C4-C6 were similarly prepared, except that no benzoquinone was added. The relative amount of each component used is indicated in Table 2.

[0062] The rubber compositions of Examples 6 and C4-C6 were then cured in a compression molding press at 335° C. for 11 minutes to obtain spheres, which were subsequently ground to a diameter of 1.55 inches.

[0063] Each of the resulting spheres was evaluated for Atti compression and COR at 125 ft / sec. The SFI of Example 6 was then determined by comparing the compression and COR of Example 6 with the compression and COR of C4-C6, according to the SFI procedure described above. The results for compression, COR, and SFI are reported in Table 2.

TABLE 2E...

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Abstract

The present invention is directed to a golf ball having at least one layer formed from a rubber composition comprising a base rubber, at least 0.05 parts by weight of a free radical initiator, per 100 parts of the base rubber, and at least 0.1 parts by weight of a benzoquinone, per 100 parts of the base rubber. The rubber composition may be present in any one or more of a core layer, a cover layer, or an intermediate layer.

Description

FIELD OF THE INVENTION [0001] The present invention is directed to rubber compositions comprising a base rubber, at least 0.05 parts by weight of a free radical initiator, per 100 parts of the base rubber, and at least 0.10 parts by weight of a benzoquinone, per 100 parts of the base rubber. The present invention is also directed to the use of such compositions in golf equipment. BACKGROUND OF THE INVENTION Benzoquinones [0002] The use of benzoquinones in rubber-based golf ball compositions is known. For example, U.S. Pat. No. 6,339,119 to Ladd et al. discloses a golf ball containing a cover layer and a core layer, where the core layer is molded from a scorch retarding composition comprising a scorch retarding peroxide, an elastomeric polymer, and a crosslinking agent. The scorch retarding peroxide typically contains a free radical scavenger selected from the group consisting of benzoquinones, hydroquinones, phenols, benzaldehydes, cyclohexadiene-1-ones, and mixtures thereof. The a...

Claims

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Application Information

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IPC IPC(8): C08L21/00A63B37/06A63B37/12
CPCA63B37/0003A63B37/0038A63B37/005A63B37/0061A63B37/0065C08K5/08C08K5/098C08K5/14C08L21/00
Inventor BULPETT, DAVID A.COMEAU, BRIANGOGUEN, DOUGLAS S.
Owner ACUSHNET CO
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