One-piece solid golf ball

Inactive Publication Date: 2002-05-02
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

0008] A main object of the present invention is to provide a one-piece wound golf ball having excellent

Problems solved by technology

If the golf balls for round games are used as a golf ball for driving ranges, good shot feel and excellent flight performance are maintained, but the durability is very poor as a golf ball for driving ranges, which is repeatedly hit.
However, when softening the golf ball in order to improve the shot feel or improving the flight performance, the durability is degraded.
It is very difficult to improve shot feel and flight performance, while maintaining excellent durability.
When zinc acrylate, which is used as a co-crosslinking agent of rubber composition for a core of two-piece golf ball, is used fo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples 1 to 3

[0056] (Examples 1 to 3 and Comparative Examples 1 to 6)

[0057] The rubber compositions having the formulation shown in Tables 1 and 2 were mixed, and the mixtures were then press molded at the vulcanization conditions shown in the same Tables in a mold, which is composed of an upper mold and a lower mold having a hemispherical cavity, to obtain one-piece golf balls having a diameter 42.75 mm. The Mooney viscosity, Mw, Mn and content of cis-1,4-butadiene of the polybutadiene rubbers used are shown in Table 3.

1TABLE 1 (parts by weight) Comparative Example No. Example No. Composition 1 2 3 1 2 Polybutadiene A 90 90 80 100 50 Polybutadiene B 10 10 20 -- -- Polybutadiene C -- -- -- -- 50 Zinc oxide 23 23 23 23 23 Methacrylic acid 24 24 24 24 24 Vulcanization 0.15 0.50 0.20 0.20 0.20 stabilizer *1 Dicumyl peroxide 1.40 2.40 1.40 1.60 1.45 Vulcanization condition The first Temp. (.degree. C.) 171 171 171 165 160 stage Time (min) 17 17 17 20 25 The sec- Temp. (.degree. C.) -- -- -- -- 170 o...

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Abstract

The present invention provides a one-piece solid golf ball having excellent rebound characteristics and good shot feel, while maintaining excellent processability and durability. The present invention relates to a one-piece solid golf ball formed from a rubber composition comprising a mixture consisting of polybutadiene (a) synthesized using nickel-containing catalyst and polybutadiene (b) synthesized using cobalt-containing catalyst and hydroquinone or derivatives thereof as a vulcanization stabilizer, wherein a Mooney viscosity and a weight ratio of the polybutadienes (a) and (b), an amount of the vulcanization stabilizer, a center hardness (the minimum hardness in the golf ball) and surface hardness of the golf ball, and a difference between the maximum hardness and minimum hardness in the golf ball are adjusted to a specified range.

Description

[0001] The present invention relates to a one-piece wound golf ball. More particularly, it relates to a one-piece wound golf ball having excellent rebound characteristics and good shot feel, while maintaining excellent processability and durability.[0002] Golf balls are typically classified into two types, that is, golf balls for round games and golf balls for driving ranges. It is difficult to say that performance, which is required for these two types of golf balls, is the same with each other. The performance required for the golf ball for round games is good shot feel, excellent flight performance and the like. If the golf balls for round games are used as a golf ball for driving ranges, good shot feel and excellent flight performance are maintained, but the durability is very poor as a golf ball for driving ranges, which is repeatedly hit. Therefore, at driving ranges, the durability is regarded as more important than the shot feel and flight performance, and golf balls having ...

Claims

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Application Information

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IPC IPC(8): A63B37/00A63B37/06A63B37/08C08K3/00C08K5/13C08K5/14C08L9/00
CPCA63B37/0003A63B37/0051A63B37/0062A63B37/0063A63B37/0073A63B37/06A63B37/08C08L9/00A63B2037/087C08K3/0033C08K5/13C08K5/14C08L2666/08C08K3/013A63B37/00622A63B37/00621
Inventor FUSHIHARA, KAZUHISAYABUKI, YOSHIKAZU
Owner SUMITOMO RUBBER IND LTD
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