One-piece solid golf ball

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 ...

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 rebound characteristics and good shot feel, while maintaining excellent processability and durability.

[0009] According to the present invention, the object described above has been accomplished by using 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, and adjusting 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 to a specified range, thereby providing a one-piece wound golf ball having excellent rebound characteristics and good shot feel, while maintaining excellent processability and durability.

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 for one-piece golf ball, rebound characteristics are good, but durability is very poor.

However, in the golf ball, since the polybutadiene having high Mooney viscosity is used, molecular weight of the polybutadiene rubber is high, and the processability is poor.

In addition, the rebound characteristics are improved, but the durability is degraded, and the shot feel is poor because of even hardness distribution.

However, as described in the above golf ball, since the polybutadiene having high Mooney viscosity is used, molecular weight of the polybutadiene rubber is high, and the processability is poor.