WO1999022951A1 - Pneumatiques a caracteristiques grande vitesse ameliorees - Google Patents

Pneumatiques a caracteristiques grande vitesse ameliorees Download PDF

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Publication number
WO1999022951A1
WO1999022951A1 PCT/US1997/019806 US9719806W WO9922951A1 WO 1999022951 A1 WO1999022951 A1 WO 1999022951A1 US 9719806 W US9719806 W US 9719806W WO 9922951 A1 WO9922951 A1 WO 9922951A1
Authority
WO
WIPO (PCT)
Prior art keywords
elastomer
tire
overlay
belts
lbs
Prior art date
Application number
PCT/US1997/019806
Other languages
English (en)
Inventor
George Philemon Patitsas
Jerry Lawrence Brenner
Paul Harry Sandstrom
Eric Charles Mizner
Original Assignee
The Goodyear Tire & Rubber Company
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
Application filed by The Goodyear Tire & Rubber Company filed Critical The Goodyear Tire & Rubber Company
Priority to US09/485,463 priority Critical patent/US6401780B1/en
Priority to AU50984/98A priority patent/AU5098498A/en
Priority to EP97913922A priority patent/EP1034083A1/fr
Priority to PCT/US1997/019806 priority patent/WO1999022951A1/fr
Priority to BR9714852A priority patent/BR9714852A/pt
Publication of WO1999022951A1 publication Critical patent/WO1999022951A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L21/00—Compositions of unspecified rubbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L7/00—Compositions of natural rubber
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons

Definitions

  • the invention relates to tires that have improved high speed properties.
  • Conventionally tires are loaded with high surface area carbon black to provide good tear strength and increase the modulus of the rubber.
  • a high level of fine carbon black causes the tires to have a high hysteresis, which contributes to a high rolling resistance, which works against high speed properties.
  • a pneumatic tire comprising a pair of axially spaced apart annular beads, carcass plies wrapped around the beads, reinforcing belt plies disposed over the carcass plies in a crown area of the tire, gum strips disposed between edges of the belt, and an overlay disposed radially outward of the belts, tread disposed radially outward of the overlay, and sidewalls disposed between the tread and beads.
  • the elastomer of the belts, overlay and gum strips comprises a polymer blend of 2-15 parts by weight thermoplastic reinforcing polymer per 100 parts by weight tread rubber (2-15 phr). In the illustrated embodiment, the polymer blend has a 100% modulus of 5.5 to 7.5.
  • thermoplastic reinforcing polymer is polyamide or polypropylene
  • the elastomer comprises polybutadiene, polyisoprene, styrene/butadiene copolymers, and mixtures thereof.
  • the thermoplastic reinforcing polymer may be grafted to the tread rubber using a grafting agent.
  • Figure 1 illustrates a cross section of a tire delineating the tread base and tread cap.
  • Figure 2 illustrates a belt ply containing thermoplastic domains/fibers.
  • Figure 3 illustrates a gum strip with thermoplastic domains/fibers.
  • Figure 4 illustrates an overlay ply containing thermoplastic domains/fibers.
  • Figure 4a illustrates a spiral overlay containing thermoplastic domains/fibers.
  • the crown reinforcement elastomers in addition to conventional polymers, includes 2- 30 phr thermoplastic resins. Such thermoplastic resins may be included as replacement for 5- 25 phr carbon black in the elastomer. Examples of thermoplastic resins that may be used in the elastomer include polyamides and polypropylene.
  • the filled elastomers illustrated for use in the crown reinforcement, have a 100% modulus of 5.5 to 7.5.
  • the same rubber formulations, without thermoplastic resin reinforcement, and a reinforcing amount of carbon black have a 100% modulus of about 3.5 to 4.5.
  • Crown reinforcement elastomers made with the thermoplastic reinforcing polymer of the invention are prepared by a two step process.
  • the first step involves the preparation of a polymer alloy containing thermoplastic reinforcing polymer. This process is described in U.S. patents 4,937,290 and 4,996,262, which are incorporated herein by reference.
  • the second stage of the process is the blending of the polymer alloy of step one with polymers, such as rubbers, and other compounding ingredients, in conventional mixers, such as Banbury ® mixers, extruders, or a mill mixer.
  • the second step blending or mixing can be accomplished using compounding techniques well known in the art.
  • thermoplastic reinforcing polymer in an elastomer matrix is obtained.
  • Such high temperatures cannot be achieved during normal Banbury mixing and such a micro dispersion cannot be obtained at normal temperatures, thus requiring the two-stage process.
  • the elastomers blended with the thermoplastic alloy in the second step of the process are preferably rubbers having carbon-carbon unsaturation, which can be sulfur cured.
  • Examples of such rubbers are cis-l,4-polyisoprene (natural or synthetic), cis-1,4- polybutadiene, 3,4-polyisoprene, styrene/butadiene copolymers, styrene/isoprene/butadiene terpolymers, butadiene/acrylonitrile copolymers and isoprene/acrylonitrile copolymers, and mixtures thereof.
  • a mixture of two or more of natural rubber and synthetic rubbers such as cis-1,4- polyisoprene, cis-l,4-polybutadiene, 3,4-polyisoprene, styrene/butadiene copolymers and styrene/isoprene/butadiene terpolymers is preferred.
  • the styrene/butadiene copolymer rubber can be a solution type or an emulsion polymerization rubber with a wide range of vinyl content.
  • additives can be used and mixed with the rubber composition, such as carbon black, silica, rubber processing oils, sulfur cure accelerators and retarders, antidegradants, zinc oxide, zinc stearate and/or zinc acid, and other pigments, as desired.
  • a third step may be used in the mixing process wherein the sulfur and accelerators are withheld from the second step, and added separately in a third step.
  • a wire coat compound (elastomer used to make reinforcing belts in a tire) are optimized for stiffness, wire adhesion, and high temperature durability when sufficient amounts of a nylon/natsyn blend (nylon 12 mixed with synthetic 2,4 polybutadiene) are used to replace an equal amount of carbon black with nylon 12, for example 7.5 phr (7.5 parts by weight nylon 12 per hundred parts by weight rubber) in place of (i.p.o.) 7.5 phr carbon black, as in the example.
  • a nylon/natsyn blend nylon 12 mixed with synthetic 2,4 polybutadiene
  • Thermoplastic reinforced elastomers may be used in any part of a tire where elastomers are used, but to enhance high speed properties, it is preferred that the alloys be used in the belt properties was observed when the alloys of the invention were tested in the belts, only or the overlay and gum strips only.
  • the 100% modulus of elastomers that are filled with nylon 12 is increased substantially over the modulus of the same elastomer that is filled with carbon black as a reinforcing agent. Meanwhile, the rebound properties of the same elastomer filled with nylon 12 are similar to the properties of the carbon black filled elastomer.
  • a nylon 12/polyisoprene alloy was produced in a Berstorf 43mm co-rotating twin screw extruder.
  • the twin screw extruder was operated at 55 rpm (revolution per minute) to provide an extrudate temperature of about 230°C.
  • the starting materials were introduced using loss-in-weight feeders and were introduced into the first barrel section.
  • the overall feed rate of materials was 30 lbs./hr., wherein nylon 12 was added at a rate of 5.98 lbs./hr, polyisoprene was added at a rate of 23.8 lbs./hr, and 0.46 lbs./hr comprised a mixture of dithiodiproprionic acid, thiodiphenyamine and an antioxidant.
  • the alloy thus produced was formulated into an elastomer having the following general composition used in the examples is shown in Table 1.
  • the amounts of ingredients shown in this table, and throughout the specification, are in phr, unless otherwise indicated.
  • the rubber compositions containing the materials set out in Table 1 were prepared in a BR Banbury rubber mixer using two different stages of addition (mixing). A non-productive stage was mixed for about 4 minutes to a final temperature of about 160°C, and a final productive stage was mixed for about 2 minutes to a final temperature of about 110°C.
  • the cure behavior and cured properties of the compounds are shown in Table 2.
  • dNm deci Newton meters
  • MPa megapascals
  • the value in parantheses represents Nylon phr in the final rubber composition.
  • Compounds 10, 11 and 12 were prepared in a factory Banbury mixer to be used in the tire program illustrated in Example HI.
  • Compound 11 was selected to evaluate the affects of higher hardness and modulus as compared to the control in a compound having rebound similar to the control, whereas compound 12 was selected for evaluation of a compound with higher rebound as compared to the control and hardness similar to that of the control.
  • Compound 10 is the comparison or control compound.
  • Example #10 The control compound (Sample #10) and the experimental compounds (Samples #11 and #12 from Table 3 were evaluated in P225/50VR16 Eagle passenger tires.
  • the experimental compounds were evaluated in the wirecoat, gum strips and overlay.
  • the description of the constructions evaluated are shown in Table 4. All constructions (1-5) exhibited similar handling, rolling resistance and durability.
  • Sample #11 (construction 2) in all components as shown in Table 4 gave significantly better high speed results in the laboratory step test (where the speed on a test machine is increased in increments until the tire fails). Two tires of each construction were tested. Apparently the combination of higher hardness and similar rebound in all three tire components (construction 2) gave improved high speed performance over the control construction. Construction 3, prepared using compounds with higher rebound and similar hardness, as compared to the control, did not show improvement over the control (construction 1).
  • the dash (-) indicates the performance of the control tire in the speed step test
  • + indicates an improvement of one speed step over the control
  • the minuses indicate performance levels less than the control

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Tires In General (AREA)

Abstract

Les nappes d'armature, les bandes de gomme et le revêtement de ce pneumatique, faisant montre de bonnes caractéristiques grande vitesse, contiennent de 2 à 15 parties d'un polymère thermoplastique de renforcement pour cent parties de caoutchouc (phr) en tant qu'additif au composé ou en remplacement de 5 à 25 parties de noir de carbone.
PCT/US1997/019806 1997-10-30 1997-10-30 Pneumatiques a caracteristiques grande vitesse ameliorees WO1999022951A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US09/485,463 US6401780B1 (en) 1997-10-30 1997-10-30 Tires having improved high speed properties
AU50984/98A AU5098498A (en) 1997-10-30 1997-10-30 Tires having improved high speed properties
EP97913922A EP1034083A1 (fr) 1997-10-30 1997-10-30 Pneumatiques a caracteristiques grande vitesse ameliorees
PCT/US1997/019806 WO1999022951A1 (fr) 1997-10-30 1997-10-30 Pneumatiques a caracteristiques grande vitesse ameliorees
BR9714852A BR9714852A (pt) 1997-10-30 1997-10-30 Pneumáticos possuindo proriedades de alta velocidade aperfeiçoadas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1997/019806 WO1999022951A1 (fr) 1997-10-30 1997-10-30 Pneumatiques a caracteristiques grande vitesse ameliorees

Publications (1)

Publication Number Publication Date
WO1999022951A1 true WO1999022951A1 (fr) 1999-05-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/019806 WO1999022951A1 (fr) 1997-10-30 1997-10-30 Pneumatiques a caracteristiques grande vitesse ameliorees

Country Status (3)

Country Link
EP (1) EP1034083A1 (fr)
AU (1) AU5098498A (fr)
WO (1) WO1999022951A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953436A2 (fr) * 1998-04-27 1999-11-03 Bridgestone/Firestone, Inc. Elément en forme de bande et son procédé de fabrication pour un bandage pneumatique pour roulage à plat
WO2001017800A1 (fr) * 1999-09-09 2001-03-15 The Goodyear Tire & Rubber Company Carcasse precuite, non renforcee par cables
EP1216852A2 (fr) * 2000-12-20 2002-06-26 Sumitomo Rubber Industries Limited Bande caoutchoutée comprenant un cablé utilisable dans la fabrication d'un composant de pneu, composant de pneu et bandage pneumatique
FR2901176A1 (fr) * 2006-03-27 2007-11-23 Goodyear Tire & Rubber Bandage pneumatique possedant un dispositif de protection des bords du pli de ceinture
US7432321B2 (en) 2002-07-09 2008-10-07 Momentive Performance Materials Inc. Silica-rubber mixtures having improved hardness
EP2123480A3 (fr) * 2008-05-19 2010-06-16 The Yokohama Rubber Co., Ltd. Pneumatique et son procédé de fabrication
US20110056603A1 (en) * 2008-05-16 2011-03-10 The Yokohama Rubber Co., Ltd. Pneumatic radial tire and process for producing retreaded tire
CN104245361A (zh) * 2012-04-02 2014-12-24 米其林集团总公司 用于翻新胎冠区域设置有包含热塑性弹性体的下层的轮胎的方法
CN110603159A (zh) * 2017-05-10 2019-12-20 株式会社普利司通 充气轮胎
CN110770043A (zh) * 2017-06-19 2020-02-07 株式会社普利司通 充气轮胎
CN110770040A (zh) * 2017-06-19 2020-02-07 株式会社普利司通 充气轮胎
EP3643522A4 (fr) * 2017-06-19 2021-01-27 Bridgestone Corporation Bandage pneumatique
EP3643521A4 (fr) * 2017-06-19 2021-01-27 Bridgestone Corporation Pneu pneumatique
EP3643520A4 (fr) * 2017-06-19 2021-01-27 Bridgestone Corporation Pneumatique
EP3643523A4 (fr) * 2017-06-19 2021-01-27 Bridgestone Corporation Pneumatique

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1130745A (en) * 1965-08-12 1968-10-16 Dunlop Co Ltd Pneumatic tyres
FR2110703A5 (fr) * 1970-10-27 1972-06-02 Kleber Colombes
US3916968A (en) * 1973-01-29 1975-11-04 Pneumatiques Caoutchouc Mfg Vehicle tires
EP0445486A2 (fr) * 1990-03-05 1991-09-11 The Goodyear Tire & Rubber Company Caoutchouc renforcé par du polypropylène
US5049610A (en) * 1986-09-26 1991-09-17 Ube Industries, Ltd. Fiber-reinforced rubber composition and production process and use thereof
FR2671516A1 (fr) * 1991-01-16 1992-07-17 Sumitomo Rubber Ind Pneumatique pour aeronef.
EP0645431A2 (fr) * 1993-09-27 1995-03-29 The Goodyear Tire & Rubber Company Alliages à base d'un polyester, une polyépoxide et un caoutchouc
EP0645263A2 (fr) * 1993-09-28 1995-03-29 The Goodyear Tire & Rubber Company Pneumatique ayant une faible résistance au roulement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1130745A (en) * 1965-08-12 1968-10-16 Dunlop Co Ltd Pneumatic tyres
FR2110703A5 (fr) * 1970-10-27 1972-06-02 Kleber Colombes
US3916968A (en) * 1973-01-29 1975-11-04 Pneumatiques Caoutchouc Mfg Vehicle tires
US5049610A (en) * 1986-09-26 1991-09-17 Ube Industries, Ltd. Fiber-reinforced rubber composition and production process and use thereof
EP0445486A2 (fr) * 1990-03-05 1991-09-11 The Goodyear Tire & Rubber Company Caoutchouc renforcé par du polypropylène
FR2671516A1 (fr) * 1991-01-16 1992-07-17 Sumitomo Rubber Ind Pneumatique pour aeronef.
EP0645431A2 (fr) * 1993-09-27 1995-03-29 The Goodyear Tire & Rubber Company Alliages à base d'un polyester, une polyépoxide et un caoutchouc
EP0645263A2 (fr) * 1993-09-28 1995-03-29 The Goodyear Tire & Rubber Company Pneumatique ayant une faible résistance au roulement

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953436A2 (fr) * 1998-04-27 1999-11-03 Bridgestone/Firestone, Inc. Elément en forme de bande et son procédé de fabrication pour un bandage pneumatique pour roulage à plat
EP0953436A3 (fr) * 1998-04-27 2000-10-11 Bridgestone/Firestone, Inc. Elément en forme de bande et son procédé de fabrication pour un bandage pneumatique pour roulage à plat
US6363986B1 (en) 1998-04-27 2002-04-02 Bridgestone/Firestone Research, Inc. Band element and method for building same for a run flat banded tire
WO2001017800A1 (fr) * 1999-09-09 2001-03-15 The Goodyear Tire & Rubber Company Carcasse precuite, non renforcee par cables
EP1216852A2 (fr) * 2000-12-20 2002-06-26 Sumitomo Rubber Industries Limited Bande caoutchoutée comprenant un cablé utilisable dans la fabrication d'un composant de pneu, composant de pneu et bandage pneumatique
EP1216852A3 (fr) * 2000-12-20 2003-06-18 Sumitomo Rubber Industries Limited Bande caoutchoutée comprenant un cablé utilisable dans la fabrication d'un composant de pneu, composant de pneu et bandage pneumatique
US7055568B2 (en) 2000-12-20 2006-06-06 Sumitomo Rubber Industries, Ltd. Cord-embedded rubber tape for making tire component, tire component and tire
US7432321B2 (en) 2002-07-09 2008-10-07 Momentive Performance Materials Inc. Silica-rubber mixtures having improved hardness
FR2901176A1 (fr) * 2006-03-27 2007-11-23 Goodyear Tire & Rubber Bandage pneumatique possedant un dispositif de protection des bords du pli de ceinture
US20110056603A1 (en) * 2008-05-16 2011-03-10 The Yokohama Rubber Co., Ltd. Pneumatic radial tire and process for producing retreaded tire
US8815034B2 (en) * 2008-05-16 2014-08-26 The Yokohama Rubber Co., Ltd. Pneumatic radial tire and process for producing retreaded tire
EP2123480A3 (fr) * 2008-05-19 2010-06-16 The Yokohama Rubber Co., Ltd. Pneumatique et son procédé de fabrication
CN104245361A (zh) * 2012-04-02 2014-12-24 米其林集团总公司 用于翻新胎冠区域设置有包含热塑性弹性体的下层的轮胎的方法
CN110603159A (zh) * 2017-05-10 2019-12-20 株式会社普利司通 充气轮胎
EP3623176A4 (fr) * 2017-05-10 2021-03-03 Bridgestone Corporation Pneu
CN110770043A (zh) * 2017-06-19 2020-02-07 株式会社普利司通 充气轮胎
CN110770040A (zh) * 2017-06-19 2020-02-07 株式会社普利司通 充气轮胎
EP3643522A4 (fr) * 2017-06-19 2021-01-27 Bridgestone Corporation Bandage pneumatique
EP3643519A4 (fr) * 2017-06-19 2021-01-27 Bridgestone Corporation Pneumatique
EP3643521A4 (fr) * 2017-06-19 2021-01-27 Bridgestone Corporation Pneu pneumatique
EP3643520A4 (fr) * 2017-06-19 2021-01-27 Bridgestone Corporation Pneumatique
EP3643523A4 (fr) * 2017-06-19 2021-01-27 Bridgestone Corporation Pneumatique
EP3643518A4 (fr) * 2017-06-19 2021-01-27 Bridgestone Corporation Pneumatique
US11207920B2 (en) 2017-06-19 2021-12-28 Bridgestone Corporation Pneumatic tire

Also Published As

Publication number Publication date
AU5098498A (en) 1999-05-24
EP1034083A1 (fr) 2000-09-13

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