EP1100595A4 - Balle de golf a revetement en polyurethanne - Google Patents

Balle de golf a revetement en polyurethanne

Info

Publication number
EP1100595A4
EP1100595A4 EP00922249A EP00922249A EP1100595A4 EP 1100595 A4 EP1100595 A4 EP 1100595A4 EP 00922249 A EP00922249 A EP 00922249A EP 00922249 A EP00922249 A EP 00922249A EP 1100595 A4 EP1100595 A4 EP 1100595A4
Authority
EP
European Patent Office
Prior art keywords
golf ball
prepolymer
polyurethane
cover
ball according
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.)
Withdrawn
Application number
EP00922249A
Other languages
German (de)
English (en)
Other versions
EP1100595A1 (fr
Inventor
K Dewanjee Pijush
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.)
Topgolf Callaway Brands Corp
Original Assignee
Callaway Golf Co
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
Priority claimed from US09/295,635 external-priority patent/US6117024A/en
Priority claimed from US09/361,912 external-priority patent/US6190268B1/en
Application filed by Callaway Golf Co filed Critical Callaway Golf Co
Publication of EP1100595A1 publication Critical patent/EP1100595A1/fr
Publication of EP1100595A4 publication Critical patent/EP1100595A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/02—Special cores
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
    • C08G18/4269—Lactones
    • C08G18/4277—Caprolactone and/or substituted caprolactone
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/0023—Covers
    • A63B37/0029—Physical properties
    • A63B37/0031—Hardness
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/0023—Covers
    • A63B37/0029—Physical properties
    • A63B37/0033—Thickness
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/007—Characteristics of the ball as a whole
    • A63B37/0072—Characteristics of the ball as a whole with a specified number of layers
    • A63B37/0075—Three piece balls, i.e. cover, intermediate layer and core

Definitions

  • the present invention relates to a cover for a golf ball. More specifically, the
  • present invention relates to a golf ball cover layer composed of a polyurethane
  • Conventionally golf balls are made by molding a cover around a core.
  • core may be wound or solid, and there may be an intermediate layer.
  • ionomeric resins e.g., DuPont's SURLYN®
  • polyurethanes e.g., polyurethanes
  • Natural balata is derived from the Bully Gum tree, while synthetic balata
  • Balata is expensive compared to other cover
  • Gutta percha is derived from the Malaysian sapodilla tree.
  • a golf ball covered with gutta percha is considered to have a harsh sound and feel
  • Ionomeric resins as compared to balata, are typically less expensive and tend
  • a golf ball with a polyurethane cover generally has greater durability than a
  • the polyurethane covered golf ball generally has a
  • Polyurethanes may be thermosetting or thermoplastic. Polyurethanes are
  • a prepolymer formed by reacting a prepolymer with a polyfunctional curing agent, such as a
  • the polyurethane prepolymer is the reaction product of, for
  • a diisocyanate and a polyol such as a polyether or a polyester.
  • polyurethane covers usually do not have the distance of other golf balls such as those
  • U.S. Patent Number 3,034,791 discloses a polyurethane golf ball
  • TDI toluene-2,4-diisocyanates
  • thermoplastic polyesterurethane golf ball cover formed from a reaction product of a
  • polyester glycol (molecular weight of 800-1500) (aliphatic diol and an aliphatic
  • patent further describes a suitable use for the resultant material to be golf ball covers.
  • multilayer golf ball giving a "progressive performance" (i.e. different performance
  • Dissatisfaction for example, remains with processing and manufacturing the balls
  • Wound balls have tolerances that are more difficult to control due to core sizes
  • the present invention provides a golf ball that demonstrates the best overall
  • the golf ball of the present invention is able to accomplish
  • polyurethane prepolymer or a blend of polyurethane prepolymers including p-
  • FIG. 1 illustrates a perspective view of a golf ball of the present invention
  • a cut-away portion showing a core, a boundary layer, and a cover.
  • FIG. 2 illustrates a perspective view of a golf ball of the present invention
  • the golf ball of the present invention is generally cylindrical
  • the golf ball 10 includes a core 12, a boundary layer 14 and a cover
  • the golf ball 10 may only include a core 12
  • the cover 16 is a polyurethane cover having a predetermined hardness and a
  • the polyurethane cover 16 is composed of a polyurethane
  • the blend of diisocyanate prepolymers includes at least at least
  • diisocyanate prepolymers includes at least one PPDI-based polyurethane prepolymer
  • TDI-based polyurethane prepolymer include at least one TDI-based polyurethane prepolymer and at least one MDI-based
  • the polyurethane cover 16 encompasses a boundary layer 14, as shown in
  • FIG. 1, or alternatively the cover 16 may encompass the core 12 as shown in FIG. 2.
  • the boundary layer 14 is composed of a thermoplastic material that has a
  • the boundary layer 14 will encompass the core 12.
  • a golf ball 10 is subjected to tremendous forces when impacted with a golf
  • the golf ball 10 of the present is capable of enduring
  • the polyurethane utilized in the present invention is preferably composed of
  • the TDI-based prepolymer is preferably formed
  • prepolymer is preferably a PPDI-based prepolymer formed from PPDI and a
  • polyester polyol preferably a polycaprolactone.
  • the prepolymer blend is cured with
  • the curing agent may be a diol (e.g., 1,4 butane diol,
  • trimethylpropanol a mixture of diols (e.g., 1,4 butane diol and ethylene glycol, or
  • glycols such as a 1,3-bis(trimethyl)-2-aminoethyl-N-(trimethyl)-2-aminoethyl-N-(trimethyl)-2-aminoethyl-N-(trimethyl)-2-aminoethyl-N-(trimethyl)-2-aminoethyl-N-(trimethyl)-2-oethyl, 1,3-diol, 1,3-diol, 1,3-dioethyl-N-(trimethyl)-2-aminoethyl-N-(trimethyl)-2-aminoethyl-N-(trimethyl)-2-aminoethyl-N-(trimethyl)-2-aminoethyl-N-(trimethyl)-2-aminoethyl-N-(trimethyl)-2-
  • triols a diamine
  • diamine a mixture of diamines
  • diamines a mixture of diamines
  • oligomeric diamine a mixture of triols, a diamine, a mixture of diamines, an oligomeric diamine, a
  • the curing agent is
  • the blend of prepolymers includes three
  • prepolymer is preferably formed from TDI and a polyether polyol.
  • diisocyanate-based polyurethane prepolymer is preferably a PPDI-based prepolymer
  • diisocyanate-based polyurethane prepolymer is a PPDI-based prepolymer formed
  • the curing agent is a blend of a
  • the polyurethane cover 16 of the present invention is preferably formed from a blend
  • polyurethane prepolymers lowers the viscosity of the mixture, lowers the
  • the TDI-based prepolymer may
  • the polyurethane prepolymer blend range from 10 to 40 percent of the polyurethane prepolymer blend.
  • the polyurethane prepolymer blend range from 10 to 40 percent of the polyurethane prepolymer blend.
  • TDI-based prepolymer is 30 percent of the polyurethane prepolymer blend.
  • TDI based prepolymer is a TDI terminated polyether prepolymer available
  • the dual blend and tri-blend formulations will preferably contain a PPDI
  • PPDI terminated polyester prepolymer is available from Uniroyal
  • the polyurethane prepolymer blend may have 10 to 40 parts of a TDI
  • polyether prepolymer may have the following properties: (1), the polyurethane prepolymer blend may have the following properties: (1), the polyurethane prepolymer blend may have the following properties: (2), the following properties: (3), the polyurethane prepolymer blend may have
  • the polyurethane prepolymer blend may have 10 to 40 parts of a TDI terminated polyether prepolymer blended
  • PPDI terminated polyester prepolymer More specific blend formulations are set
  • the PPDI-based polyurethane prepolymer may be any polyurethane prepolymer.
  • the cover 16 of the golf ball 10 of the present invention is most preferably
  • prepolymer and cured with a mixture of curing agents such as a diamine and a blend
  • a suitable diamine is toluene ethylene diamine.
  • curing agent may be used.
  • the curing agent mixture for the cover 16 of the present invention may have
  • the curing agent is composed of 30
  • component may be a blend of different diamines.
  • the ratio of the polyurethane prepolymer blend to curing agent is determined by the nitrogen-carbon-oxygen group ("NCO") content of the polyurethane
  • TDI-terminated polyester is preferably in the range of 4.0% to 9.0%, while the
  • NCO content of the PPDI-terminated polyether is preferably in the range of 5.0% to
  • the NCO content of the PPDI-terminated polyester is preferably in the range
  • the NCO content of the polyurethane prepolymer blend ranges
  • the weight ratio of the polyurethane is the weight ratio of the polyurethane
  • prepolymer blend to the curing agent is preferably in the range of about 10: 1 to
  • the polyurethane prepolymer blend and curing agent are referred to Prior to curing.
  • the polyurethane is formed by first heating and mixing
  • the mixture by applying heat and pressure for a predetermined time period.
  • a catalyst e.g. dibutyl tin dilaurate, a tertiary amine, etc.
  • a catalyst e.g. dibutyl tin dilaurate, a tertiary amine, etc.
  • the polyurethane prepolymer blend material is preferably degassed and
  • processing temperature for the polyurethane prepolymer blend is preferably in the
  • the polyurethane prepolymer blend is preferably flowable from the first holding container to a mixing chamber in a range of about 200-1100 grams of material per
  • material may be agitated in the first holding container, in the range of 0-250 rpm, to
  • the curing agent is preferably degassed and warmed in a second holding
  • curative is preferably in the range of about 50-230°F, and most preferably in the
  • the curing agent is preferably flowable from the second
  • the catalyst is added to the curing agent in the second holding container to form
  • catalysts are agitated, in the range of about 0 to 250 rpm, to maintain an even
  • the catalyst is added in an amount in the range of about 0.25-5% by
  • the polyurethane prepolymer blend and curative mixture are preferably added
  • colorant material such as, for example, titanium dioxide, barium sulfate, and/or zinc
  • the amount of colorant material added is preferably in the range of about 0-10% by weight of the
  • the entire mixture is preferably agitated in
  • the mixing chamber in the range of about 1 to 250 rpm prior to molding.
  • the golf ball cover 16 of the present invention is preferably
  • the cover material may alternatively be provided
  • thermoplastic polyurethane for injection molding of the cover 16 over the
  • thermoplastic polyurethane the PPDI-based polyurethane
  • prepolymer is formed by reacting a polyol with PPDI.
  • the PPDI-based prepolymer is formed by reacting a polyol with PPDI.
  • chain extender such as, for example, a diol or mixture of diols
  • triol or mixture of triols a diamine or mixture of diamines, etc.
  • thermoplastic product is modified using conventional procedures to form a desired thermoplastic
  • the PPDI-based polyurethane cover 16 of the present invention exhibits good
  • the cover 16 has a tan ⁇
  • thermosetting urethanes thermosetting urethanes.
  • the core 12 of the golf ball 10 is the "engine” for the golf ball 10 such that
  • the core 12 for a USGA approved golf ball is constructed to enable the
  • the core 12 of the golf ball 10 is generally composed of a blend of a base
  • a preferred base rubber is a polybutadiene having a cis-1 ,4 content
  • cross-linking agents in a golf ball core is well known, and metal
  • acrylate salts are examples of such cross-linking agents.
  • Free radical initiators are used to promote cross-linking of the base rubber and the cross-linking agent.
  • peroxides such as dicumyl peroxide, bis-(t-butyl peroxy) diisopropyl
  • Zinc oxide is also preferably included in the core formulation. Zinc oxide
  • weight adjusting filler may primarily be used as a weight adjusting filler, and is also believed to participate
  • Additional processing aids such as dispersants and activators may optionally be included.
  • zinc stearate may be added as a processing aid (e.g. as an
  • the core components are mixed and compression
  • the finished core 12 has a diameter of about 1.35 to about 1.64 inches for a
  • the core weight is preferably
  • the core PGA compression is
  • PGA compression is defined as follows:
  • the Riehle compression value is the amount of deformation of a golf ball in inches
  • the present invention preferably includes at least one
  • boundary layer 14 that preferably is composed of a thermoplastic (e.g. thermoplastic
  • thermoplastic elastomer or thermoplastic elastomer
  • thermoplastic elastomer or a blend of thermoplastics (e.g. metal containing, non-
  • the golf ball 10 may have several boundary
  • boundary layer 14 is composed of at least one thermoplastic that contains organic
  • the metal ion may be, for example, sodium, zinc,
  • magnesium lithium, potassium, cesium, or any polar metal ion that serves as a
  • thermoplastics are ionomers based on
  • fillers with ionomer carriers may be used to modify (e.g. preferably increase) the
  • thermoplastic blend to control the moment of inertia
  • thermoplastic materials suitable for use in a boundary layer 14 of a golf ball 10 of the present invention include, for
  • the Shore D hardness of the boundary layer 14 should be about 65 or less. It is
  • boundary layer 14 have a hardness of between about 50-65
  • the boundary layer 14 has a Shore D hardness
  • Shore D hardness of 65 or lower is to improve the feel of the resultant golf ball.
  • a golfball is placed within a holder and held by a set of pins.
  • the strike plate is angled at 54 degrees from vertical.
  • the strike plate is dropped from six
  • the golf balls are measured on a cover shear criteria.
  • the scale for each is from 1 to 5, with 1 being poor, 2 being below average, 3 being average, 4 being
  • the weight of each of the golf balls 10 varies from 45.65 grams to
  • the average diameter of each of the golf balls 10 is consistently 1.684 inches.
  • the core diameter of each of the cores 12 is 1.489 inches or 1.515 inches.
  • PGA compression of each of the cores 12 varies between 60 and 75 points.
  • the twelve example golf balls of the present invention each had a boundary
  • layer 14 composed of an ionomer blend with a thickness varying from 0.0525 and
  • Table Two sets forth the properties of each of the cover layers 16 for each of
  • each of the cover layers 16 is provided in columns 2 through 6.
  • Column 2 includes
  • polyester (polycaprolactone) prepolymer The difference between the first and the second
  • prepolymer blends for examples 1-9 and 11-12 were cured with a blend of curing
  • the blend of curing agents was composed of 50 parts of a diamine curing
  • balls 10 of the present invention was cured with a blend of 70 parts of a diamine and
  • each of the twelve golf balls 10 of present invention is either 0.0300 inches or
  • golf balls 10 of present invention is either 47 degrees or 53 degrees. TABLE THREE
  • golf balls 10 of the present invention and the four well-known and well-played golf
  • Example 12 of the golf balls 10 of the present invention had a
  • balls 10 of the present invention which had a carry yardage of 256.7 yards and a total

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne une balle de golf (10) dotée d'un revêtement en polyuréthanne (16) composé d'un mélange de prépolymères de polyuréthanne. Le mélange peut être un mélange dual renfermant un prépolymère de polyuréthanne à base de TDI mélangé à un second prépolymère de polyuréthanne diisocyanate, généralement un prépolymère de polyuréthanne à base de para-phénylène diisocyanate (PPDI). Le mélange peut également être un mélange triple comprenant un prépolymère de polyuréthanne à base de TDI mélangé à deux autres prépolymères de polyuréthanne diisocyanate, généralement deux prépolymères de polyuréthanne différents à base de PPDI. La balle de golf (10) présente une durabilité d'au moins 3,0 sur une évaluation d'essai du revêtement. La balle de golf (10) de la présente invention affiche également une distance incroyable, si l'on utilise un bois n°1 BIG BERTHA® HAWKEYE®.
EP00922249A 1999-04-20 2000-04-14 Balle de golf a revetement en polyurethanne Withdrawn EP1100595A4 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US361912 1989-06-06
US295635 1999-04-20
US09/295,635 US6117024A (en) 1999-04-20 1999-04-20 Golf ball with polyurethane cover
US09/361,912 US6190268B1 (en) 1999-07-27 1999-07-27 Golf ball having a polyurethane cover
PCT/US2000/010190 WO2000062869A1 (fr) 1999-04-20 2000-04-14 Balle de golf a revetement en polyurethanne

Publications (2)

Publication Number Publication Date
EP1100595A1 EP1100595A1 (fr) 2001-05-23
EP1100595A4 true EP1100595A4 (fr) 2009-01-14

Family

ID=26969236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00922249A Withdrawn EP1100595A4 (fr) 1999-04-20 2000-04-14 Balle de golf a revetement en polyurethanne

Country Status (5)

Country Link
EP (1) EP1100595A4 (fr)
AU (1) AU4246300A (fr)
CA (1) CA2341546A1 (fr)
NZ (1) NZ510265A (fr)
WO (1) WO2000062869A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6443858B2 (en) * 1999-07-27 2002-09-03 Callaway Golf Company Golf ball with high coefficient of restitution
CN115386217B (zh) * 2022-09-23 2023-04-28 东莞华工佛塑新材料有限公司 一种高尔夫球外层胶用聚氨酯混炼胶及其制备方法和应用

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989568A (en) * 1974-11-21 1976-11-02 Acushnet Company Polyurethane covered golf balls
US4123061A (en) * 1976-05-20 1978-10-31 Acushnet Company Ball and process and composition of matter for production thereof
EP0467622A1 (fr) * 1990-07-20 1992-01-22 Acushnet Company Balle de golf en polyuréthane

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3034791A (en) 1960-04-26 1962-05-15 Du Pont Polyurethane golf ball covers
US4248432A (en) 1979-07-16 1981-02-03 The B. F. Goodrich Company Golf ball
US4349657A (en) 1981-09-28 1982-09-14 The B. F. Goodrich Company Polyurethane process
US5873796A (en) * 1990-12-10 1999-02-23 Acushnet Company Multi-layer golf ball comprising a cover of ionomer blends
US5779562A (en) * 1993-06-01 1998-07-14 Melvin; Terrence Multi-core, multi-cover golf ball
US5885172A (en) 1997-05-27 1999-03-23 Acushnet Company Multilayer golf ball with a thin thermoset outer layer
US5800286A (en) * 1996-05-01 1998-09-01 Bridgestone Sports Co., Ltd. Golf ball
US5879596A (en) * 1996-11-13 1999-03-09 E. I. Du Pont De Nemours And Company Low temperature process for making polyurethaneureas
KR0179447B1 (ko) * 1996-12-10 1999-02-01 황춘근 골프공

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989568A (en) * 1974-11-21 1976-11-02 Acushnet Company Polyurethane covered golf balls
US4123061A (en) * 1976-05-20 1978-10-31 Acushnet Company Ball and process and composition of matter for production thereof
EP0467622A1 (fr) * 1990-07-20 1992-01-22 Acushnet Company Balle de golf en polyuréthane

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO0062869A1 *

Also Published As

Publication number Publication date
EP1100595A1 (fr) 2001-05-23
CA2341546A1 (fr) 2000-10-26
WO2000062869A1 (fr) 2000-10-26
AU4246300A (en) 2000-11-02
NZ510265A (en) 2003-02-28

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