New! View global litigation for patent families

US20030144083A1 - Rubber composition for golf ball and golf ball - Google Patents

Rubber composition for golf ball and golf ball Download PDF

Info

Publication number
US20030144083A1
US20030144083A1 US10284317 US28431702A US20030144083A1 US 20030144083 A1 US20030144083 A1 US 20030144083A1 US 10284317 US10284317 US 10284317 US 28431702 A US28431702 A US 28431702A US 20030144083 A1 US20030144083 A1 US 20030144083A1
Authority
US
Grant status
Application
Patent type
Prior art keywords
rubber
solid
golf
acid
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10284317
Inventor
Nobuyuki Kataoka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Sports Co Ltd
Original Assignee
Bridgestone Sports Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUSE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
    • C08K5/00Use of organic ingredients
    • C08K5/04Oxygen-containing compounds
    • C08K5/09Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098Metal salts of carboxylic acids
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003Golf balls
    • A63B37/005Cores
    • A63B37/006Physical properties
    • A63B37/0062Hardness
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003Golf balls
    • A63B37/005Cores
    • A63B37/006Physical properties
    • A63B37/0064Diameter
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003Golf balls
    • A63B37/005Cores
    • A63B37/006Physical properties
    • A63B37/0068Initial velocity
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F279/00Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
    • C08F279/02Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUSE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
    • C08K5/00Use of organic ingredients
    • C08K5/04Oxygen-containing compounds
    • C08K5/14Peroxides
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003Golf balls

Abstract

A rubber composition for a one-piece golf ball or the solid core of a multilayer structure solid golf ball having a solid core enclosed with a cover directly or via an intermediate layer is provided comprising a base rubber, a dry preblend of an unsaturated carboxylic acid metal salt with a solid rubber having a Mooney viscosity (ML1+4, 100° C.) of 5-150, and an organic peroxide.

Description

    CROSS REFERENCE TO RELATED APPLICATION
  • [0001]
    This application is a continuation-in-part of copending application Ser. No. 10/206,816 filed on Jul. 29, 2002, the entire contents of which are hereby incorporated by reference.
  • BACKGROUND OF THE INVENTION
  • [0002]
    This invention relates to rubber compositions capable of forming golf balls having an appropriate hardness and improved rebound characteristics and exhibiting stabilized flight performance, and golf balls using the same.
  • [0003]
    In general, one-piece golf balls or the solid cores of multilayer structure solid golf balls having a solid core enclosed with a cover directly or via an intermediate layer are manufactured by molding under heat and pressure a rubber composition comprising a rubber component such as polybutadiene rubber, a metal salt of an unsaturated carboxylic acid as a co-crosslinking agent, zinc oxide as a weight modifier, and a free-radical initiator such as dicumyl peroxide.
  • [0004]
    With respect to the metal salt of an unsaturated carboxylic acid used as the co-crosslinking agent in the above rubber composition, use of zinc methacrylate and zinc acrylate is believed preferable from the standpoints of ball hardness and rebound. Typically zinc methacrylate and zinc acrylate are blended in large amounts with the rubber component such as polybutadiene. When a rubber composition is obtained by mixing or kneading the respective components, the kneading operation is very difficult because the zinc salt in fine powder form scatters much and heavily sticks to the roll mill or kneader.
  • [0005]
    Since the zinc unsaturated carboxylates, when blended in the compositions, are poorly dispersible and liable to form agglomerates in the compositions, they are not effectively utilized, sometimes inviting a loss of resilience and a failure to acquire a certain hardness.
  • [0006]
    One common approach for avoiding the unsaturated carboxylic acid metal salts from sticking to the kneader is to use metal salts of higher fatty acid as a lubricant. In order for these fatty acid metal salts to exert the desired effects, the kneading temperature must be elevated to as high as about 100° C., but a problem of scorching occurs at such elevated temperatures.
  • [0007]
    U.S. Pat. No. 5,096,943 describes a rubber composition obtained by suspending a metal salt of α,β-ethylenically unsaturated carboxylic acid in an aliphatic hydrocarbon solvent and mixing the suspension with a polymer solution. This method necessitates removal of the solvents at the end of liquid mixing.
  • [0008]
    U.S. Pat. No. 5,096,201 uses a rubber composition obtained by previously mixing and dispersing a metal salt of unsaturated carboxylic acid in liquid rubber, and kneading it in a rubber compound. Presumably the liquid rubber used herein can reduce the rebound of the golf ball obtained therefrom.
  • SUMMARY OF THE INVENTION
  • [0009]
    An object of the invention is to provide rubber compositions capable of forming solid golf balls having an appropriate hardness and improved rebound characteristics and exhibiting stabilized flight performance, and golf balls using the same.
  • [0010]
    To attain the above object, the present invention provides
  • [0011]
    (1) a rubber composition for a one-piece golf ball or the solid core of a multilayer structure solid golf ball having a solid core enclosed with a cover directly or via an intermediate layer, comprising a base rubber, a dry preblend of an unsaturated carboxylic acid metal salt with a solid rubber having a Mooney viscosity (ML1+4, 100° C.) of 5 to 150, and an organic peroxide;
  • [0012]
    (2) a one-piece golf ball characterized by being formed of the above rubber composition;
  • [0013]
    (3) a multilayer structure solid golf ball having a solid core enclosed with a cover directly or via an intermediate layer, characterized in that the solid core is formed of the above rubber composition.
  • [0014]
    More particularly, the solid golf ball of the invention is constructed of a rubber composition which is prepared by compounding a metal salt of an unsaturated carboxylic acid such as zinc methacrylate or zinc acrylate as a co-crosslinking agent in a rubber compound. According to the invention, the metal salt of unsaturated carboxylic acid is previously mixed and dispersed in a solid rubber such as a solid-state 1,4-polybutadiene before the preblend is compounded in the rubber compound. This approach, which does not resort to the solvent and liquid rubber used in the prior art techniques, prevents the co-crosslinking agent from scattering during the kneading operation of the rubber composition and also prevents the co-crosslinking agent from sticking to the roll mill or kneader to reduce the amount of the crosslinking agent dispersed in the composition. Then the co-crosslinking agent can be uniformly and effectively dispersed at low temperature without forming agglomerates.
  • [0015]
    Accordingly, the solid golf balls of the invention are constructed of the rubber composition in which the co-crosslinking agent is uniformly and effectively dispersed at low temperature. By molding and vulcanizing the rubber composition, a uniform one-piece golf ball or a uniform solid core for a multilayer structure solid golf ball is formed. As a result, solid golf balls having an appropriate hardness and improved rebound characteristics and exhibiting stabilized flight performance can be consistently manufactured.
  • DETAILED DESCRIPTION OF THE INVENTION
  • [0016]
    As described above, the rubber composition of the invention has compounded therein a dry preblend of an unsaturated carboxylic acid metal salt as the co-crosslinking agent with a solid rubber.
  • [0017]
    The unsaturated carboxylic acid metal salts used herein include zinc and magnesium salts of acrylic acid, methacrylic acid, maleic acid and the like. Most preferably, zinc acrylate or zinc methacrylate is used. The unsaturated carboxylic acid metal salts may be either of completely neutralized form or of partially neutralized form as shown below.
    Figure US20030144083A1-20030731-C00001
  • [0018]
    R is hydrogen or methyl.
  • [0019]
    The solid rubbers with which the unsaturated carboxylic acid metal salts are preblended include solid-state polybutadiene, solid-state polyisoprene, solid-state butadiene-isoprene copolymers, solid-state butadiene-styrene copolymers, solid-state polybutene, solid-state ethylene-propylene rubber, and analogous rubbers having a Mooney viscosity (ML1+4, 100° C.) of 5 to 150, the lower limit of Mooney viscosity being preferably 20, more preferably 30, and sometimes 40, and the upper limit being preferably 100, more preferably 80, and sometimes 60. It is preferred to use a solid rubber of the same type as the base rubber to be described later. The unsaturated carboxylic acid metal salt used in mixing with and dispersing in the solid rubber may be one which has been prepared in metal salt form. Alternatively, the metal salt can be arrived at by reacting an unsaturated carboxylic acid with a metal oxide, hydroxide or the like in the solid rubber. A Mooney viscosity of less than 5 leads to a lowering of resilience whereas a Mooney viscosity of more than 150 leads to a productivity drop because of time-consuming preparation of a preblend.
  • [0020]
    The mixing ratio of the unsaturated carboxylic acid metal salt to the solid rubber is preferably such that at least 50 parts by weight, especially at least 200 parts by weight and up to 1,000 parts by weight, especially up to 500 parts by weight of the unsaturated carboxylic acid metal salt is present per 100 parts by weight of the solid rubber. Too small amounts of the unsaturated carboxylic acid metal salt would require the preblend be compounded in more amounts. Too large amounts of the unsaturated carboxylic acid metal salt would result in that the preblend is difficult to prepare.
  • [0021]
    The preblend can be prepared by dry blending the unsaturated carboxylic acid metal salt with the solid rubber in a predetermined ratio, using a mixing machine such as a kneader or roll mill. During the dry blending, the unsaturated carboxylic acid metal salt is preferably added in three or more divided portions at a temperature of 80 to 110° C., preferably 80 to 100° C. This addition method is recommended particularly when a kneader is used.
  • [0022]
    The unsaturated carboxylic acid metal salt as the co-crosslinking agent is added to and mixed with a rubber composition from which one-piece golf balls or solid cores of multilayer structure solid golf balls are constructed, while it is in dry preblend with the solid rubber. The amount of unsaturated carboxylic acid metal salt added is preferably 10 to 50 parts by weight, especially 15 to 40 parts by weight per 100 parts by weight of the base rubber component in the rubber composition. As to the solid rubber in which the unsaturated carboxylic acid metal salt has been mixed and dispersed, its amount is included in the base rubber component.
  • [0023]
    The base rubber in the rubber composition may be any desired one selected from those rubbers commonly used as one-piece golf ball materials or solid core materials of multilayer structure solid golf balls. Preferably a 1,4-polybutadiene rubber containing at least 40% by weight of cis-structure is used. The most preferred base rubber is a 1,4-polybutadiene rubber containing at least 90% by weight of cis-structure while the preferred solid rubber is a 1,4-polybutadiene rubber containing at least 90% by weight of cis-structure as well. In this embodiment, styrene-butadiene rubber, polyisoprene rubber or the like may be compounded with the 1,4-polybutadiene rubber.
  • [0024]
    In the rubber composition, an organic peroxide such as dicumyl peroxide is blended as a free-radical initiator, preferably in an amount of 0.3 to 3 parts by weight, especially 0.7 to 2 parts by weight per 100 parts by weight of the rubber component.
  • [0025]
    If necessary, in the rubber composition, there may be suitably compounded zinc oxide, plasticizers, antioxidants, organic sulfur compounds and other components which can be commonly used in the preparation of one-piece golf balls and solid cores of multilayer structure solid golf balls.
  • [0026]
    For the manufacture of solid golf balls of the invention, the rubber composition formulated as above is mixed in a suitable mixing machine such as a roll mill, kneader or Banbury mixer, and heat compression molded in a mold, thereby producing a one-piece golf ball or a solid core of a multilayer structure solid golf ball. The vulcanizing and molding conditions used herein are as conventional.
  • [0027]
    In the case of multilayer structure solid golf balls such as two-piece balls, the solid core formed of the above rubber composition is enclosed with a cover directly or after being enclosed with an intermediate layer. The materials used for the intermediate layer and cover may be conventional cover materials such as ionomer resins, polyester, polyurethane and nylon.
  • [0028]
    Since the rubber composition of the invention avoids scattering and sticking to the mixing machine of the unsaturated carboxylic acid metal salt as the co-crosslinking agent during the kneading operation, allows the co-crosslinking agent to be uniformly and effectively dispersed at low temperature, and eliminates a need for solvent and liquid rubber, golf balls having an appropriate hardness and improved rebound characteristics and exhibiting stabilized flight performance can be produced therefrom at a low cost and high productivity.
  • EXAMPLE
  • [0029]
    Examples and Comparative Examples are given below for illustrating the invention, but the invention is not limited to the following Examples.
  • Examples 1-8 & Comparative Examples 1-2
  • [0030]
    Preparation of Master Batch
  • [0031]
    Master batches were prepared by kneading zinc acrylate with BRO1 (by JSR, solid-state cis-1,4-polybutadiene, ML1+4=44, same hereinafter) in the amounts shown below, in a kneader and a roll mill.
  • [0032]
    Rubber compositions of Examples shown in Table 1 were prepared by using a kneader and kneading the components in one-stage at an initial temperature of 40° C. and a maximum temperature of 90° C. Rubber compositions of Comparative Examples were prepared by kneading in conventional non-professional and professional two stages. Using a mold, the rubber compositions were then heat compression molded at 160° C. for 14-17 minutes to form solid cores having a diameter of 39.2 mm. They were determined for hardness and initial velocity by the following tests. The results are shown in Table 1.
    Master batch 1
    BR01 100 pbw (parts by weight)
    Zinc acrylate 1,000 pbw
    Master batch 2
    BR01 100 pbw
    Zinc acrylate 333 pbw
    Master batch 3
    BR01 100 pbw
    Zinc acrylate 200 pbw
    Master batch 4
    BR01 100 pbw
    Zinc acrylate 100 pbw
  • [0033]
    Core Hardness
  • [0034]
    Hardness is expressed by a deflection of a solid core under an applied load of 100 kgf. A larger value indicates a softer core.
  • [0035]
    Core Initial Velocity
  • [0036]
    Measured by an initial velocity meter of the same type as authorized by USGA.
    TABLE 1
    Compar- Compar-
    ative ative
    Component Example Example Example Example Example Example Example Example Example Example
    (pbw) 1 2 3 4 5 6 7 8 1 2
    BR01 98.2 97.5 94.6 92.5 91.0 87.5 82.0 75.0 100 100
    Master batch 1 19.8 27.5
    Master batch 2 23.4 32.5
    Master batch 3 27.0 37.5
    Master batch 4 36.0 50.0
    (total BR01 amount) (100) (100) (100) (100) (100) (100) (100) (100) (100) (100)
    Zinc acrylate 18.0 25.0
    Zinc oxide 24.3 21.4 24.3 21.4 24.3 21.4 24.3 21.4 24.3 21.4
    Dicumyl peroxide 1 1 1 1 1 1 1 1 1 1
    Sticking to kneader no no no no no no no no yes yes
    Powder scattering little little little little little little little little much much
    Core hardness (mm) 4.15 2.99 4.11 2.94 4.10 2.95 4.10 2.94 4.29 3.06
    Core initial 76.80 77.63 76.81 77.65 76.83 77.64 76.85 77.64 76.62 77.47
    velocity (m/s)
  • [0037]
    As is evident from Table, the compositions of Examples eliminate any sticking of zinc acrylate to the kneader and substantially suppress scattering of zinc acrylate powder. The solid cores obtained therefrom exhibit a higher initial velocity than the solid cores of Comparative Examples having an equal hardness.

Claims (6)

  1. 1. A rubber composition for a one-piece golf ball or the solid core of a multilayer structure solid golf ball having a solid core enclosed with a cover directly or via an intermediate layer, comprising a base rubber, a dry preblend of an unsaturated carboxylic acid metal salt with a solid rubber having a Mooney viscosity (ML1+4, 100° C.) of 5 to 150, and an organic peroxide.
  2. 2. The rubber composition of claim 1 wherein 100 parts by weight of the solid rubber has been dry blended with 50 to 1,000 parts by weight of the unsaturated carboxylic acid metal salt.
  3. 3. The rubber composition of claim 1 wherein the base rubber is a polybutadiene containing at least 90% by weight of cis-1,4-bond and the solid rubber is a polybutadiene containing at least 90% by weight of cis-1,4-bond.
  4. 4. The rubber composition of claim 1 wherein the unsaturated carboxylic acid metal salt is zinc acrylate or zinc methacrylate.
  5. 5. A one-piece golf ball formed of a golf ball-forming rubber composition comprising a base rubber, a dry preblend of an unsaturated carboxylic acid metal salt with a solid rubber having a Mooney viscosity (ML1+4, 100° C.) of 5 to 150, and an organic peroxide.
  6. 6. A solid golf ball having a solid core enclosed with a cover directly or via an intermediate layer, wherein the solid core is formed of a golf ball-forming rubber composition comprising a base rubber, a dry preblend of an unsaturated carboxylic acid metal salt with a solid rubber having a Mooney viscosity (ML1+4, 100° C.) of 5 to 150, and an organic peroxide.
US10284317 2001-12-19 2002-10-31 Rubber composition for golf ball and golf ball Abandoned US20030144083A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2001385555 2001-12-19
JP2001-385555 2001-12-19
US10206816 US20030139532A1 (en) 2001-12-19 2002-07-29 Rubber composition for golf ball and golf ball
US10284317 US20030144083A1 (en) 2001-12-19 2002-10-31 Rubber composition for golf ball and golf ball

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10284317 US20030144083A1 (en) 2001-12-19 2002-10-31 Rubber composition for golf ball and golf ball
US11060531 US7241231B2 (en) 2001-12-19 2005-02-18 Rubber composition for golf ball and golf ball

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US10206816 Continuation-In-Part US20030139532A1 (en) 2001-12-19 2002-07-29 Rubber composition for golf ball and golf ball

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11060531 Continuation US7241231B2 (en) 2001-12-19 2005-02-18 Rubber composition for golf ball and golf ball

Publications (1)

Publication Number Publication Date
US20030144083A1 true true US20030144083A1 (en) 2003-07-31

Family

ID=27615644

Family Applications (2)

Application Number Title Priority Date Filing Date
US10284317 Abandoned US20030144083A1 (en) 2001-12-19 2002-10-31 Rubber composition for golf ball and golf ball
US11060531 Expired - Fee Related US7241231B2 (en) 2001-12-19 2005-02-18 Rubber composition for golf ball and golf ball

Family Applications After (1)

Application Number Title Priority Date Filing Date
US11060531 Expired - Fee Related US7241231B2 (en) 2001-12-19 2005-02-18 Rubber composition for golf ball and golf ball

Country Status (1)

Country Link
US (2) US20030144083A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090124757A1 (en) * 2007-11-09 2009-05-14 Bridgestone Sports Co., Ltd. Method of manufacturing a golf ball
US20090286628A1 (en) * 2008-05-16 2009-11-19 Randy Petrichko Golf ball having a hard outer skin

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7564489B1 (en) * 2005-02-18 2009-07-21 Crosstek Capital, LLC Method for reducing row noise with dark pixel data

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220564A (en) * 1978-01-09 1980-09-02 Japan Synthetic Rubber Co., Ltd. High-hardness and high-modulus rubber composition containing 1,2-polybutadiene
US4683257A (en) * 1985-06-12 1987-07-28 Bridgestone Corporation Rubber compositions for solid golf balls
US4929678A (en) * 1987-05-02 1990-05-29 Sumitomo Rubber Industries, Ltd. Rubber composition and a solid golf ball obtained therefrom
US5585440A (en) * 1992-12-25 1996-12-17 Sumitomo Rubber Industries, Ltd. Rubber composition for golf balls
US6139447A (en) * 1997-10-24 2000-10-31 Sumitomo Rubber Industries Limited Rubber composition for golf ball and golf ball produced using the same
US6277920B1 (en) * 1992-04-24 2001-08-21 Spalding Sports Worldwide, Inc. Golf ball cores formed from ultra-high mooney viscosity butadiene rubber
US6315679B1 (en) * 1998-07-27 2001-11-13 Sumitomo Rubber Industries, Ltd. Thread wound golf ball
USH2036H1 (en) * 1999-06-02 2002-07-02 The Goodyear Tire & Rubber Company High cis-1,4-polybutadiene rubber compounds
US6465546B1 (en) * 2000-10-16 2002-10-15 Callaway Golf Company Process for manufacturing a core for a golf ball
US6486261B1 (en) * 1998-12-24 2002-11-26 Acushnet Company Thin-layer-covered golf ball with improved velocity

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0733457B2 (en) 1987-03-12 1995-04-12 住友ゴム工業株式会社 Preparation of the rubber cross-linking agent
JPH0431973A (en) 1990-05-28 1992-02-04 Omron Corp Pattern inspecting device
US6646053B2 (en) 2000-09-18 2003-11-11 Sumitomo Rubber Industries, Ltd. Golf ball

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220564A (en) * 1978-01-09 1980-09-02 Japan Synthetic Rubber Co., Ltd. High-hardness and high-modulus rubber composition containing 1,2-polybutadiene
US4683257A (en) * 1985-06-12 1987-07-28 Bridgestone Corporation Rubber compositions for solid golf balls
US4929678A (en) * 1987-05-02 1990-05-29 Sumitomo Rubber Industries, Ltd. Rubber composition and a solid golf ball obtained therefrom
US6277920B1 (en) * 1992-04-24 2001-08-21 Spalding Sports Worldwide, Inc. Golf ball cores formed from ultra-high mooney viscosity butadiene rubber
US5585440A (en) * 1992-12-25 1996-12-17 Sumitomo Rubber Industries, Ltd. Rubber composition for golf balls
US6139447A (en) * 1997-10-24 2000-10-31 Sumitomo Rubber Industries Limited Rubber composition for golf ball and golf ball produced using the same
US6315679B1 (en) * 1998-07-27 2001-11-13 Sumitomo Rubber Industries, Ltd. Thread wound golf ball
US6486261B1 (en) * 1998-12-24 2002-11-26 Acushnet Company Thin-layer-covered golf ball with improved velocity
USH2036H1 (en) * 1999-06-02 2002-07-02 The Goodyear Tire & Rubber Company High cis-1,4-polybutadiene rubber compounds
US6465546B1 (en) * 2000-10-16 2002-10-15 Callaway Golf Company Process for manufacturing a core for a golf ball

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090124757A1 (en) * 2007-11-09 2009-05-14 Bridgestone Sports Co., Ltd. Method of manufacturing a golf ball
US8039529B2 (en) * 2007-11-09 2011-10-18 Bridgestone Sports Co., Ltd. Method of manufacturing a golf ball
US20090286628A1 (en) * 2008-05-16 2009-11-19 Randy Petrichko Golf ball having a hard outer skin

Also Published As

Publication number Publication date Type
US7241231B2 (en) 2007-07-10 grant
US20050143193A1 (en) 2005-06-30 application

Similar Documents

Publication Publication Date Title
US4713409A (en) Vulcanizable polymeric compositions containing a zinc dimethacrylate adjuvant and method for preparing the adjuvant
US5605512A (en) Golf ball
US5716293A (en) Golf ball
US6184276B1 (en) Quinone diimine as a rubber additive
US5824740A (en) Golf ball
US5565524A (en) Golf ball
US3804421A (en) Solid molded golf ball
US4955613A (en) Polybutadiene golf ball product
US20040152540A1 (en) Golf ball
US5403010A (en) Two-piece golf ball
US5824746A (en) Golf balls incorporating foamed metallocene catalyzed polymer
US5306760A (en) Improved golf ball cover compositions containing high levels of fatty acid salts
US5895105A (en) Golf ball cover compositions
US6419594B1 (en) Distance multi-layer golf ball
US7365128B2 (en) Highly-neutralized acid polymers and their use in golf balls
US20020099120A1 (en) Golf ball material and golf ball
US5215308A (en) Solid golf ball
US6534571B1 (en) Desiccant dispersion for rubber compounds
US4076255A (en) Golf balls
US6130295A (en) Golf ball
US5051480A (en) Elastomeric blends
US5093402A (en) Solid golf balls reinforced with metal salts of α,β-ethylenically unsaturated carboxylic acids via solution masterbatch
US20090124757A1 (en) Method of manufacturing a golf ball
US20070213441A1 (en) Rubber compositions comprising quinhydrones and the use thereof in golf balls
JP2008523952A (en) Golf ball

Legal Events

Date Code Title Description
AS Assignment

Owner name: BRIDGESTONE SPORTS CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KATAOKA, NOBUYUKI;REEL/FRAME:013445/0946

Effective date: 20021023