JPH09108384A - Golf ball - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gold ball capable of improving hitting feeling without reducing a high resilience property and extending the carry, by containing two components of ionomer resin and specific diene based rubber and forming the cover with a dynamic linking substance in a specific mixing ratio of both components. SOLUTION: In this golf ball with a core 1 composed of a center 1a and a string rubber layer 1b and a cover 2 with dimples 2a, the cover 2 contains at least two components of ionomer resin and diene based rubber with a part compatible with the ionomer resin. The cover 2 is formed with a dynamic linking substance of a mixture of the ionomer resin and the diene based rubber with a part compatible with the ionomer resin with mixing ratio of 40:60-99:1 by weight. In that case, when the mixing ratio with ionomer resin is lower than this range, the high resilience property of this resin is harmed to reduce the carry, and on the other hand, when higher, hitting feeling is feared to be not improved by strongly appearing the property of this resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf ball, and more specifically, feel at impact (feeling at the time of impact).
And a high repulsion performance and a long flight distance.

[0002]

2. Description of the Related Art In recent years, ionomer resins have been widely used as golf ball covers (for example, JP-A-49-49727). This is because the ionomer resin has excellent resilience performance and cut resistance.

However, since the ionomer resin has a high rigidity, the golf ball using this ionomer resin for the cover has a problem that the shot feeling is hard and bad.

Therefore, various attempts have been made to improve the feel at impact by mixing (blending) rubber with the ionomer resin, but the results have not yet been sufficiently achieved.

For example, Japanese Patent Application Laid-Open No. 55-133440 proposes a method of crosslinking a mixture of an ionomer resin and an ethylene-α-olefin copolymer rubber with a peroxide. When cross-linked with, the ionomer resin is also cross-linked, so that the shot feeling cannot be sufficiently improved.

Further, in Japanese Patent Laid-Open No. 6-79017,
A method has been proposed in which an ionomer resin and a diene rubber are mixed and the diene rubber in the mixture is crosslinked, but since the crosslinking speed and the crosslinked rubber particle size are not taken into consideration (that is, any compatibilization is judged. However, since the diene rubber may have a continuous layer in the ionomer resin, there are many disadvantages in workability such as roughening during the surface treatment.

[0007]

As described above, in golf balls using an ionomer resin as a cover material, various attempts have been made to improve the feel at impact, but they have a sufficient feel at impact. There were problems such as not being able to improve it and causing a drop in workability.

Therefore, according to the present invention, the workability and the high resilience performance of the ionomer resin are not reduced.
An object of the present invention is to provide a golf ball having a soft shot feeling, a good shot feeling, a high resilience performance, and a long flight distance.

[0009]

As a result of intensive studies to achieve the above object, the present inventors have found that at least two components of an ionomer resin and a diene rubber having a portion compatible with the ionomer resin. When constituting a cover with a dynamically cross-linked product of a mixture containing a specific ratio, without lowering the workability and repulsion performance of the ionomer resin,
The inventors have found that a golf ball having a soft shot feeling, a good shot feeling, a high resilience performance, and a long flight distance can be easily obtained, and have completed the present invention.

The present invention will be described in more detail. The present inventors have found that by dynamically crosslinking the diene rubber in the ionomer resin, the high resilience performance based on the ionomer resin and the flexibility based on the diene rubber. Thus, a cover composition capable of providing a good golf ball having a long flight distance and a soft shot feeling is obtained. In addition, among them, it was also found that the smaller the particle diameter of the dynamically crosslinked diene rubber, the softer the shot feeling and the more excellent the resilience performance.

However, it has also been found that there is a limit to making the particle diameter of the diene rubber finer by merely dynamically crosslinking. In addition, when the particle size of the diene rubber is large, surface roughening occurs during surface treatment such as paint pretreatment during golf ball production, and work to repair the roughened portion is required, resulting in workability. It has been found that the particle size of the diene rubber is preferably small in these respects, because the adhesiveness of the paint is deteriorated as well.

However, in the present invention, the ionomer resin and the diene rubber having a portion compatible with the ionomer resin are mixed to make them compatible with each other in a fine particle state, and the mixture is dynamically mixed. By subjecting to cross-linking, the diene rubber having a portion compatible with the ionomer resin is dynamically cross-linked, so that the rubber particles dispersed in the ionomer resin are further miniaturized, whereby the surface of the molding process is improved. Roughness is eliminated, workability is suppressed from being lowered, and a golf ball having a soft shot feeling, high resilience performance and a long flight distance can be obtained.

In the present invention, the mixing ratio of the ionomer resin and the diene rubber having a portion compatible with the ionomer resin is 40:60 to 99: 1 by weight.

When the mixing ratio of the ionomer resin is less than the above range, the high resilience performance of the ionomer resin is impaired and the flight distance is reduced, and when the mixing ratio of the ionomer resin exceeds the above range, the properties of the ionomer resin are increased. May come out strongly and the shot feeling may not be improved. The mixing ratio of the ionomer resin and the diene rubber having a portion compatible with the ionomer resin is 50:50 to 95: 5 by weight.
Is preferred.

The diene rubber having a portion compatible with the ionomer resin is for softening the shot feeling without deteriorating the high resilience performance of the ionomer resin, but a part of it is usually used. It may be a diene rubber. However, when this ordinary diene rubber is used in combination with a diene rubber having a portion compatible with the ionomer resin, a diene rubber having a portion compatible with the ionomer resin and the ionomer resin and a normal diene rubber are used. It is necessary that the content of the diene rubber having a portion compatible with the ionomer resin is 1% by weight or more, and particularly preferably 5% by weight or more.

Next, the ionomer resin and the diene rubber having a portion compatible with the ionomer resin will be described in detail.

As the ionomer resin, for example, Himilan 1605 manufactured by DuPont Mitsui Polychemical Co., Ltd.
(Trade name, sodium ion neutralized ethylene-methacrylic acid copolymer ionomer resin), Himilan 1707
(Trade name, sodium ion neutralized ethylene-methacrylic acid copolymer ionomer resin), Himilan 1706
(Trade name, zinc ion neutralized ethylene-methacrylic acid copolymer ionomer resin), Himilan AM7315
(Trade name, zinc ion neutralized ethylene-methacrylic acid copolymer ionomer resin), Himilan AM7317
(Brand name, zinc ion neutralized ethylene-methacrylic acid copolymer type ionomer resin), Himilan 1555 (Brand name, sodium ion neutralized ethylene-methacrylic acid copolymer type ionomer resin), Himilan 1557 (Brand name, zinc ion neutralized) Ethylene-methacrylic acid copolymer type ionomer resin), Iontec 7010 (trade name, zinc ion neutralized ethylene-acrylic acid copolymer type ionomer resin) manufactured by Exxon Chemical Co., Iontec 800
0 (trade name, sodium ion neutralized ethylene-acrylic acid copolymer type ionomer resin), Surlyn 7930 manufactured by DuPont (trade name, lithium ion neutralized ethylene-
Methacrylic acid copolymer type ionomer resin), Surlyn 8511 (trade name, zinc ion neutralized ethylene-methacrylic acid copolymer type ionomer resin), Surlyn 8512
(Trade name, sodium ion neutralized ethylene-methacrylic acid copolymer type ionomer resin) and the like. However, these are merely examples, and the present invention is not limited to these.

As the diene rubber which is the base of the diene rubber having a portion compatible with the ionomer resin, for example, ethylene propylene diene rubber (E
PDM), butadiene rubber (BR), isoprene rubber (IR), styrene butadiene rubber (SBR), acrylonitrile butadiene rubber (NBR) and the like.

In the present invention, the compatibility with the ionomer resin in the diene rubber having a portion compatible with the ionomer resin means that the compatibility with the ionomer resin is good, or the residual carboxyl in the ionomer resin is good. It is meant to have a functional group capable of reacting with a group.

The good compatibility in the above means that the ionomer resin and the diene rubber having a portion compatible with the ionomer resin are mixed with each other as fine particles and observed microscopically by an electron microscope or the like. At that time, it is preferable that the particles are mixed with each other as fine particles of about 10 μm or less, particularly fine particles of 2 μm or less.

As the one having good compatibility with the ionomer resin as described above, since the main chain of the ionomer resin is ethylene, an ethylene polymer is suitable. From such a viewpoint, ethylene propylene diene rubber and butadiene rubber are suitable. Are preferred.

On the other hand, examples of the moiety capable of reacting with the residual carboxyl group in the ionomer resin include maleic anhydride, oxazoline group, epoxy group and glycidyl group bonded to the diene rubber. Examples of the diene rubber having a portion capable of reacting with a carboxyl group include a diene rubber having maleic anhydride as a constituent, a diene rubber having an oxazoline group as a constituent, and an epoxy group as a constituent. Examples thereof include a diene rubber or a diene rubber having a glycidyl group as one constituent.

As the diene rubber having maleic anhydride as a constituent, a maleic anhydride is added to the main chain of the diene rubber, or a maleic anhydride is copolymerized with the main chain of the diene rubber. And so on. Specific examples of such a diene rubber containing maleic anhydride as a constituent component include, for example, maleic anhydride butadiene rubber,
Examples thereof include anhydrous maleated ethylene propylene rubber and anhydrous maleated ethylene propylene diene rubber. In these diene rubbers containing maleic anhydride as one constituent, the maleic anhydride reacts with the residual carboxyl groups of the ionomer resin.

Examples of the diene rubber having an oxazoline group as a constituent include those obtained by adding an oxazoline group to the main chain of the diene rubber and those obtained by copolymerizing the oxazoline group with the main chain of the diene rubber. Can be mentioned. In the diene rubber containing these oxazoline groups as one constituent, the oxazoline groups react with the residual carboxyl groups of the ionomer resin.

Examples of the diene rubber having an epoxy group as a constituent component include, for example, those obtained by adding an epoxy-containing group to the main chain of the diene rubber, and those obtained by copolymerizing the epoxy-containing group with the main chain of the diene rubber. Examples thereof include epoxidized EPDM (epoxidized ethylene propylene diene rubber) and epoxidized SBS (epoxidized styrene-butadiene-styrene copolymer). In the diene rubber containing these epoxy groups as one constituent, the epoxy groups react with the residual carboxyl groups of the ionomer resin.

Examples of the diene rubber having a glycidyl group as one constituent include, for example, glycidyl methacrylate group,
Examples thereof include diene rubbers having a glycidyl acrylate group, an allyl glycidyl ether group, a butenecarboxylic acid ester group, and the like. Then, in the diene rubber containing these glycidyl groups as one constituent, the glycidyl groups react with the residual carboxyl groups of the ionomer resin. Two or more of these diene rubbers having a portion compatible with the ionomer resin may be used in combination.

Examples of the cross-linking agent for performing dynamic cross-linking include vulcanizing agents for rubber, vulcanization accelerators, resin cross-linking agents, and the like, which may be used alone or in combination of two or more.

Specific examples of the cross-linking agent include p-benzoylquinone dioxime, p, p'-dibenzoylquinone dioxime, 4,4'-dithio-bis-dimorpholine, alkylphenol-formaldehyde and bromine. Tid-alkylphenol-formaldehyde, phenol resin, coumarone resin, dibenzothiazyl disulfide, N, N'-dicyclohexyl-2-benzothiazyl sulfenamide, hexamethylenetetramine, mercaptobenzothiazole, tetramethylthiuram disulfide, tetraethylthiuram disulfide. However, the present invention is not limited thereto, and various kinds of vulcanizing agents and vulcanization accelerators used in ordinary rubber compounding may be used. It can be.

The dynamic cross-linking is a method of cross-linking the rubber in the sea of the resin by introducing the resin, the uncross-linked rubber and the cross-linking agent into the kneader and mixing them at the reaction temperature of the cross-linking agent or higher. Since the breaking and the crosslinking of the rubber occur at the same time, it is possible to disperse the finely divided rubber particles in the resin, and to obtain a material having both the properties of the resin and the rubber. Thus, the dynamic cross-linking has the advantage that no separate cross-linking operation is required and the material obtained can be reused when heated.

The mixing method is not particularly limited, and for example, a closed kneader such as a kneader or an open kneader such as a roll can be used, but in view of continuous productivity, an extruder is used. The mixing method used is suitable. In addition, the same substance may be mixed in several ways at the time of the above mixing.

The cover composition contains at least an ionomer resin, a diene rubber having a portion compatible with the ionomer resin (which may include a part of a normal diene rubber), and a cross-linking agent. If necessary, pigments such as titanium dioxide and barium sulfate, and other additives such as stabilizers, dispersants, ultraviolet absorbers, and light stabilizers are appropriately mixed and prepared.

The dynamic crosslinking is carried out during mixing as described above, and the temperature at which the dynamic crosslinking is carried out is suitably 20 ° C. lower than the activation temperature of the crosslinking agent to 250 ° C. For example, an oxime-based cross-linking agent generally has an activation temperature of 1
Since the temperature is about 80 ° C., the temperature during dynamic crosslinking is 16
A range of 0 to 250 ° C is suitable. Further, in the case of an aldehyde-based crosslinking agent, the activation temperature is generally about 120 to 140 ° C., so that the temperature at the time of dynamic crosslinking is 100 to 25.
A range of 0 ° C is suitable. When sulfur and a vulcanization accelerator are used in combination, the activation temperature is generally about 150 ° C, so that the temperature during dynamic crosslinking is preferably in the range of 130 to 250 ° C. If the temperature during dynamic crosslinking is lower than the above temperature, the crosslinking may not occur in the diene rubber having a portion compatible with the ionomer resin, or the progress of the crosslinking reaction may be slow, resulting in poor production efficiency. There is
If the temperature during dynamic crosslinking is higher than 250 ° C., the diene rubber having a portion compatible with the ionomer resin may be deteriorated and the effect of softening the shot feeling may not be sufficiently exhibited. . However, the temperature at the time of the dynamic crosslinking is merely an example, and the temperature is not necessarily limited thereto.

When the dynamic crosslinking is carried out, the torque once increased due to the crosslinking of the diene rubber having a portion compatible with the ionomer resin is reduced, and the dynamic crosslinking is terminated immediately before or immediately after being stabilized. Is preferred. Thus, the completion of the dynamic crosslinking is appropriately controlled by the torque value, but in terms of time, it varies greatly depending on the type of the crosslinking agent, the composition, the amount of the composition, etc., but usually 1 to 60.
Minutes, for example, in the case of an oxime-based cross-linking agent, 3 to
About 60 minutes, about 2 to 40 minutes in the case of an aldehyde-based crosslinking agent, and about 2 to 30 minutes in the case of using sulfur and a vulcanization accelerator together.

A cover composition comprising a dynamically crosslinked product of a mixture containing at least two components of the ionomer resin and a diene rubber having a portion compatible with the ionomer resin is a solid golf ball core (solid core). ,
It can be used for coating any core of a wound golf ball core (thread wound core).

The solid core may be a core having a one-layer structure or a core having a multilayer structure of two or more layers,
For example, as a core for a two-piece ball, with respect to 100 parts by weight of polybutadiene, α, β-monoethylenically unsaturated carboxylic acid such as acrylic acid or methacrylic acid or a metal salt thereof, or a functional group such as trimethylolpropane trimethacrylate is used. 10-60 parts by weight of a crosslinking agent (vulcanizing agent) including a monomer or the like, zinc oxide,
3 to 30 parts by weight of a filler such as barium sulfate and 0.5 to 5 parts by weight of a peroxide such as dicumyl peroxide are added, and if necessary, an antioxidant is further added in an amount of 0.1 to 1 parts by weight. The rubber composition obtained by press-crosslinking (vulcanizing) is heat-compressed at a temperature of, for example, 140 to 170 ° C. for 10 to 40 minutes to form a spherical crosslinked (vulcanized) product. it can.

The thread-wound core is composed of a center and a thread rubber wound around the center, and either a liquid type or a rubber type can be used as the center. As the rubber center, for example, a center obtained by crosslinking (vulcanizing) a rubber composition similar to that of the solid core can be used.

As the thread rubber, those conventionally used can be used. For example, an antiaging agent, a crosslinking (vulcanization) accelerator, sulfur and the like are added to natural rubber or a mixture of natural rubber and synthetic polyisoprene. A product obtained by crosslinking (vulcanizing) the compounded rubber composition can be used. However, these solid cores and thread-wound cores are merely examples, and the present invention is not limited to these examples.

The method of covering the core with the cover is not limited to a particular method, and may be a usual method.
For example, a cover composition composed of the specific dynamic crosslinked product is formed into a half-shell-shaped half shell in advance, two cores are used to wrap the core, and pressure molding is performed at 100 to 170 ° C. for 1 to 15 minutes. Alternatively, a method may be adopted in which the cover composition is directly injection-molded on the core to wrap the core.
The cover usually has a thickness of about 1 to 4 mm. Then, when forming the cover, dimples are formed on the surface of the ball as required, and paint finishing, stamping and the like are also performed as necessary.

Next, the structure of the golf ball of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view schematically showing an example of the golf ball of the present invention. The golf ball shown in FIG. 1 is a thread-wound golf ball, and in FIG. 1, 1 is composed of a center 1a and a thread rubber layer 1b. Core, 2
Is a cover and 2a is a dimple.

The rubber thread for forming the center 1a and the rubber thread layer 1b is not limited to a particular one, and the same one can be used as the conventional rubber. Any of the systems,
The rubber thread layer 1b is formed by winding a rubber thread around the center 1a in a stretched state, whereby the core 1 called a thread wound core is formed.

The cover 2 covers the core 1 and is formed from the cover composition comprising the specific dynamically cross-linked product. 2a is the cover 2
It is a dimple provided in. In the golf ball shown in FIG. 1, the core 1 is a wound core, but instead of this, for example, a solid core made of a crosslinked (vulcanized) molded body of a rubber composition containing butadiene rubber as a main material is used. You can also

The dimples 2a are provided on the golf ball cover 2 in an appropriate number and manner so as to obtain the desired or desired characteristics.
In addition, paint or marking is applied to the surface of these golf balls, if necessary.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described more specifically with reference to Examples. However, the present invention is not limited to only these examples.

Examples 1 to 4 and Comparative Examples 1 to 4 Golf balls of Examples 1 to 4 and Comparative Examples 1 to 4 were manufactured through the steps shown in the following.

Preparation of core: A rubber bag made of vulcanized natural rubber was filled with water, and a rubber center was formed into a spherical shape, and a rubber thread was wound in a stretched state to form a rubber thread layer.
A wound core having an outer diameter of 38.5 mm was produced.

Preparation of Cover Composition: Ionomer Resin, Diene Rubber Having Portion Compatible with Ionomer Resin, Ordinary Diene Rubber, and Crosslinking Agent Are mixed in the composition shown in Table 1 and dynamically crosslinked to prepare cover compositions, and for Comparative Examples 1 to 3, mixed in the composition shown in Table 2 to prepare cover compositions, and compared. For Example 4, the composition for the cover was prepared by dynamically crosslinking while mixing in the composition shown in Table 2. In addition, the said mixing was performed at each zone temperature = 165-225 degreeC using the twin-screw extruder (screw diameter 45mm, L / D = 25). However, each component was preliminarily mixed by an open roll, and the mixture was supplied to the extruder. The time required for the dynamic crosslinking was 5 minutes in all, and the blending amount of each component in the table is parts by weight.

Ionomer resin: High Milan 1605
[Product name, manufactured by Mitsui DuPont Polychemical Co., Ltd., sodium ion neutralized ethylene-methacrylic acid copolymer type ionomer resin]

Has a part compatible with the ionomer resin
Diene rubber: AN-PB [trade name, Nippon Soda Co., Ltd.
Made, maleated butadiene rubber]

Diene rubber: Esprene 505A [trade name, ethylene propylene diene rubber manufactured by Sumitomo Chemical Co., Ltd.]

Cross-linking agent: Takkyroll 250 [trade name, manufactured by Taoka Chemical Industry Co., Ltd., brominated alkylphenol-formaldehyde]

Production of golf ball: The above-mentioned cover composition was formed into pellets, a half shell was formed using the pellet-like cover composition, and two pieces of the shell were used to wrap the core, and a half shell was formed. By heat molding at ℃ for 2 minutes, the outer diameter is 42.7 mm and the weight is 45.1.
Eight types of thread-wound golf balls within the range of 45.3 g were produced.

The flight distance of the obtained golf ball was measured,
And the shot feeling was evaluated. In addition, the particle size of the dispersed rubber particles in the ionomer resin in the cover composition was measured. The particle diameter of the rubber particles, the method of measuring the flight distance of the golf ball, and the method of evaluating the shot feeling are as follows.

Measurement of particle size of rubber particles and average particle size
The method of calculating first, measurement sample, the cover composition of the molding into pellets, the pellets cover composition 160
It was prepared by thermoforming into a sheet shape under pressure at 3 ° C. for 3 minutes. Then, the sample surface was cut smoothly by a microtome, and a scanning electron microscope (T-manufactured by JEOL)
220A), a backscattered electron image photograph of the sample after OsO ₄ staining was taken, the vertical length of any 60 rubber particles thereof was measured, and the number averaged value was taken as the average particle diameter.

Flying distance measuring method: A No. 1 wood club is attached to a swing robot manufactured by Trutemper Co., and eight balls are hit at a head speed of 45 m / s, and the distance to the falling point is measured. The results are shown as the average value.

Method of evaluating shot feeling: Five golf players actually hit the ball with the No. 1 wood club, and the shot feeling felt by each person is classified according to the following 7-point evaluation. HH: Too hard and bad. H: Hard. AH: It's a little hard, but it's in a good range. A: Just right. AS: Somewhat soft, but in good range. S: Soft. SS: It's too soft and bad.

Table 1 shows the composition of the cover composition of Examples 1 to 4, the average particle diameter of the rubber particles, the flight distance of the obtained golf ball, and the evaluation results of shot feeling. 4 shows the results of evaluation of the composition of the cover composition of 4, the average particle diameter of the rubber particles, the flight distance of the obtained golf ball, and the shot feeling.

[0057]

[Table 1]

[0058]

[Table 2]

As is clear from the results shown in Table 1, in Examples 1 to 4, the flight distance was long and the shot feeling was good. This is High Iran 160, an ionomer resin.
AN-PB (trade name), which is a diene rubber having a portion compatible with the ionomer resin, in contrast to 5 (trade name)
This is due to the fact that they were mixed (blended) and dynamically crosslinked.

On the other hand, in Comparative Example 1 in which only the ionomer resin was used as the resin component of the cover, as shown in Table 2, the shot feeling was hard and bad. Further, Comparative Example 2 in which a normal diene rubber was only blended without dynamic cross-linking without blending an ionomer resin with a diene rubber having a portion compatible with the ionomer resin has a reduced flight distance. Also, the shot feeling was too soft and it was getting worse.

As described above, the characteristics of Comparative Example 2 are those of Examples 1 to 1.
What was worse than No. 4 can be judged also from the average particle diameter of the rubber particles in the ionomer resin in the cover composition. That is, as is clear from the comparison of the average particle size of the rubber particles shown in Tables 1 and 2, the average particle size of the rubber particles of Comparative Example 2 is larger than the average particle size of the rubber particles of Examples 1 to 4, and the result is as follows. It is considered that the characteristics are deteriorated, such as the reduced flight distance as described above. On the other hand, in Examples 1 to 4, it was possible to improve the shot feeling without lowering the resilience performance, because the diene rubber having a portion compatible with the ionomer resin as described above. AN-
It is considered that the particle size of the rubber particles dispersed in the ionomer resin could be reduced by the blending of PB and the dynamic crosslinking.

Further, in Comparative Example 3 in which AN-PB (trade name), which is a diene rubber having a portion compatible with the ionomer resin, was not dynamically cross-linked even when blended with the ionomer resin, Comparative Example 3 Particle size does not become small enough,
The flight distance was short, and the feel at impact was soft and lacked in properness.

Further, Comparative Example 4 in which the amount of the AN-PB (trade name), which is a diene rubber having a portion compatible with the ionomer resin, was large, the flight distance was short and the feel at impact was too soft. Was becoming.

[0064]

As described above, the present invention can provide a golf ball having a good shot feeling, high resilience performance, and a long flight distance.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing an example of a golf ball according to the present invention.

[Explanation of symbols]

 1 core 1a center 1b thread rubber layer 2 cover

Claims (6)

[Claims] 1. A golf ball having a core and a cover, wherein the cover contains at least two components of an ionomer resin and a diene rubber having a portion compatible with the ionomer resin, and the ionomer resin and the ionomer resin. A golf ball, which comprises a dynamically crosslinked product of a mixture having a mixing ratio of 40:60 to 99: 1 by weight with a diene rubber having a portion compatible with. 2. Crosslinking of the diene rubber to 100 parts by weight of the diene rubber in the mixture containing at least two components of the ionomer resin and the diene rubber having a portion compatible with the ionomer resin. Agent 0.1
The golf ball according to claim 1, wherein the golf ball comprises a dynamically cross-linked product obtained by dynamically mixing 30 to 30 parts by weight and at least a part of the diene rubber. 3. The golf ball according to claim 1, wherein the diene rubber having a portion compatible with the ionomer resin is a diene rubber having maleic anhydride as one constituent. 4. The golf ball according to claim 1, wherein the diene rubber having a portion compatible with the ionomer resin is a diene rubber having an oxazoline group as one constituent. 5. The golf ball according to claim 1, wherein the diene rubber having a portion compatible with the ionomer resin is a diene rubber having an epoxy group as one constituent. 6. The golf ball according to claim 1, wherein the diene rubber having a portion compatible with the ionomer resin is a diene rubber having a glycidyl group as one constituent.