WO2007123060A1 - ゴム組成物及びそれを用いたランフラットタイヤ - Google Patents
ゴム組成物及びそれを用いたランフラットタイヤ Download PDFInfo
- Publication number
- WO2007123060A1 WO2007123060A1 PCT/JP2007/058142 JP2007058142W WO2007123060A1 WO 2007123060 A1 WO2007123060 A1 WO 2007123060A1 JP 2007058142 W JP2007058142 W JP 2007058142W WO 2007123060 A1 WO2007123060 A1 WO 2007123060A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rubber
- layer
- mass
- tire
- rubber composition
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L15/00—Compositions of rubber derivatives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L19/00—Compositions of rubbers not provided for in groups C08L7/00 - C08L17/00
- C08L19/006—Rubber characterised by functional groups, e.g. telechelic diene polymers
-
- 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
- B60C2001/0033—Compositions of the sidewall inserts, e.g. for runflat
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- 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
Definitions
- the present invention relates to a rubber composition capable of improving run flat durability and a run flat tire using the rubber composition for a side reinforcing layer and a Z or bead filler.
- a side reinforcing layer made of a rubber composition alone or a composite of a rubber composition and fibers has been provided to improve the rigidity of the sidewall portion.
- a side reinforcing layer made of a rubber composition alone or a composite of a rubber composition and fibers.
- the side wall portion of the tire becomes increasingly deformed when the tire is in a so-called run-flat running state.
- the deformation of the reinforcing layer also increases, heat generation proceeds, and in some cases reaches 200 ° C or higher. In such a state, the side reinforcing layer exceeds the breakage limit, resulting in tire failure.
- the load during run flat cannot be supported, and the tire does not run during run flat.
- the deformation of the sidewall portion becomes very large, which causes an increase in heat generation of the rubber composition, and as a result, the tire has a problem of causing failure earlier.
- the rubber composition used for the side reinforcing layer or the bead filler is also changed.
- the rubber composition has a lower elastic modulus, it cannot support the load during run-flat as described above, and the deformation of the sidewall portion of the tire becomes very large, increasing the heat generation of the rubber composition. As a result, the actual situation is that failure will occur earlier.
- Patent Document 2 various modified conjugated gen-aromatic vinyl copolymers and It has been proposed to use a rubber composition containing a heat resistance improver for the side reinforcing layer and the bead filler.
- Patent Document 3 proposes that a rubber composition containing a specific conjugated diene polymer and a phenolic resin is used for the side reinforcing layer and the bead filler. These are intended to increase the elastic modulus of the rubber composition used for the side reinforcement layer and the bead filler, and to suppress a decrease in the elastic modulus at high temperatures. Significant improvements were obtained.
- Patent Document 1 Japanese Patent Laid-Open No. 11 310019
- Patent document 2 WO02Z02356 non-fret
- Patent Document 3 JP 2004 74960 A
- the present invention aims to provide a run-flat tire that improves run-flat durability without impairing the ride comfort of the run-flat tire during normal running. .
- the present inventor has determined a rubber component containing a specific amount of isocyanate-modified gen rubber, a phenolic resin, and a curing agent for resin. It was found that the problem can be achieved by using the rubber composition contained in the ratio of at least one of the side reinforcing layer and the bead filler. The present invention has been completed based on such knowledge.
- the present invention provides the rubber component 100 parts by mass comprising Isoshiana one bets modified Jengomu vinyl bond content of 20 mass% or more of diene component of 50 mass 0/0 or more, 2 to the Fueno le system ⁇ 20 parts by mass and 0.5 to 5 parts by mass of a resin hardener, and a rubber thread and a toroid-like stretch between a pair of bead cores, and both ends of the bead cores are connected to the tire inner cap.
- Area tire diameter A tread rubber layer disposed on the outer side to form a ground contact portion, a belt layer disposed between the tread rubber layer and the crown region of the force layer to form a reinforcing belt, and a tire of the carcass layer
- a bead filler side side force shoulder region in a side region of the carcass layer the cross-sectional shape along the tire rotation axis is approximately crescent shaped between the carcass layer and the inner liner.
- FIG. 1 is a schematic view showing a cross section of one embodiment of a run flat tire of the present invention.
- the rubber component 100 parts by mass comprising Isoshiana over preparative denaturing Jengomu vinyl bond content of 20 mass% or more of diene component of 50 mass 0/0 above, Fueno one It contains 2 to 20 parts by mass of a rosin-based resin and 0.5 to 5 parts by mass of a curing agent for resin.
- the vinyl bond content is preferably 25% by mass or more, more preferably 30% by mass or more, and further preferably 35% by mass or more. In particular, it is preferably 40 to 60% by mass.
- the vinyl bond amount is expressed in “mass%”.
- the isocyanate-modified genogen rubber in the present invention is preferably an isocyanate-modified conjugated gen-aromatic vinyl, an isocyanate-modified conjugated gen polymer and Z or an isocyanate-modified conjugated gen aromatic bull copolymer. More preferably, it is a copolymer.
- examples of the conjugation monomer include 1,3 butadiene, 1,3 pentene, 1,3 hexagen, and the like, among which 1,3 butadiene is preferable.
- examples of the aromatic vinyl monomer used for the copolymerization with the co-gene monomer include styrene, a-methylstyrene, 1-butylnaphthalene, 3-butyltoluene, ethylvinylbenzene, divinylbenzene, Examples include 4-cyclohexylstyrene, 2,4,6 trimethylstyrene, etc. Among them, styrene is preferable.
- isocyanate-modified styrene butadiene copolymer rubber is particularly preferred as the isocyanate-modified gen rubber.
- the rubber composition of the present invention is required to the isocyanate-modified Jengomu containing the 50 weight 0/0 or more in the rubber component. This is because if the amount is less than 50% by mass, a decrease in rubber elastic modulus due to an increase in temperature may not be suppressed. If it is less than 50% by mass, it may not be possible to suppress a decrease in rubber dynamic modulus and an increase in loss tangent tan ⁇ due to temperature rise. From this point, arbitrary preferable to contain Isoshiana one preparative denaturing Jengomu the rubber component 60 mass 0/0 above.
- other rubber components that can be mixed with the above-mentioned isocyanate modified gen rubber are not particularly limited.
- natural rubber polyisoprene synthetic rubber (IR), cis 1 , 4 Polybutadiene rubber (BR), Styrene-butadiene rubber (SBR) And butyl rubber (IIR) such as acrylonitrile butadiene rubber (NBR), chloroprene rubber (CR), and halogenated butyl rubber. Two or more of these rubbers may be used in combination.
- the modifying agent used in the isocyanate modified gen rubber in the present invention includes diphenylmethane diisocyanate (MDI), polymeric diphenylmethane diisocyanate (polymeric MDI), 2, 4-tolylene.
- MDI isophorone Diphenylmethane diisocyanate
- Z or polymeric diphenol-dimethanediisocyanate polymeric MDI
- C—MDI crude MDI
- polymeric MDI polymeric MDI
- Representative polymeric MDIs include compounds represented by the following formulas (I), (II), (III) and (IV).
- n an integer of 1 to 5.
- the above formula (II) is an MDI dimer uretidinedione
- the formula (III) is an MDI trimer isocyanurate
- the formula (IV) is a uretonimine.
- the rubber composition according to the present invention is required to contain 2 to 20 parts by mass of a phenolic resin and 0.5 to 5 parts by mass of a curing agent for resin with respect to 100 parts by mass of the rubber component. . If the phenolic resin is less than 2 parts by mass, the desired elastic modulus cannot be obtained, and if it exceeds 20 parts by mass, the loss tangent (tan ⁇ ) of the rubber increases and the run-flat durability decreases. There is also power. In addition, if the curing agent for resin is less than 0.5 parts by mass, the phenolic resin cannot be effectively cured, and if it exceeds 5 parts by mass, the rubber composition is excessively cured and the resin composition becomes hard. This is because the fatigue resistance is lowered. Between phenolic sebum and a hardener for sebum The mass ratio may be appropriately selected, but is preferably 90Z10 to 50Z50.
- phenolic resin examples include phenol-formaldehyde resin, resorcinol-formaldehyde resin, cresol resin, and the like, and phenol-formaldehyde resin is particularly preferable.
- phenolic resin 100% phenolic resin, natural resin-modified phenolic resin, oil-modified phenolic resin, and the like can be used.
- a novolac resin that is a two-step resin that is cured using a resin curing agent.
- Examples of the hardener for rosin include hexamethylenetetramine and hexamethoxymethyl melamine. These combinations can be freely selected, and a plurality of phenolic resin resins and resin curing agents may be selected. In addition, a resin containing a resin curing agent may be used.
- the rubber composition containing the isocyanate modified gen rubber in the present invention includes a vulcanizing agent such as sulfur and peroxide, and a vulcanization accelerator, which are usually used in the rubber industry.
- a vulcanizing agent such as sulfur and peroxide
- a vulcanization accelerator which are usually used in the rubber industry.
- Various compounding agents such as anti-aging agents, softening agents, reinforcing fillers such as carbon black and silica, and inorganic fillers can be appropriately contained.
- the rubber composition of the present invention may be a composite with particles, fibers, cloths, and the like of various materials.
- the rubber composition of the present invention can be produced by kneading with an ordinary Banbury mixer, internal mixer or roll.
- the rubber composition of the present invention by Bulle bonding amount 25 mass 0/0 or more Isoshiana over preparative denaturing Jengomu in Zhen components, the effect to suppress the decrease of the elastic modulus due to the temperature rise of the rubber composition is size It is possible to improve the run flat durability to suppress the deformation of the tire side.
- FIG. 1 is a schematic view showing a cross section of one embodiment of the runflat tire of the present invention.
- the run-flat tire of the present invention is connected in a toroid shape between a pair of bead cores 1 and 1 ', and both end portions also wind up the bead core 1 to the tire inner force outside. At least one radial carcass ply force is also obtained.
- a run-flat tire comprising at least one side reinforcing layer 8 having a cross-sectional shape along the tire rotation axis that is substantially crescent shaped, the side reinforcing layer 8 and / or the bead filler 7 according to the present invention.
- a rubber composition is used.
- run flat tire of this invention can be manufactured by a conventional method.
- the 100% elongation elastic modulus (MPa) and dynamic storage elastic modulus E ′ (MPa) of the rubber composition and the run-flat durability and ride comfort of the test tire were measured according to the following methods.
- a sheet having a width of 5 mm and a length of 40 mm was cut out from a slab sheet having a thickness of 2 mm obtained by vulcanizing the side inner layer rubber composition at 160 ° C. for 12 minutes, and used as a sample.
- This sample was measured using a spectrometer manufactured by Ueshima Seisakusho Co., Ltd. under conditions of a distance between chucks of 10 mm, an initial strain of 200 / ⁇ ⁇ , a dynamic strain of 1%, a frequency of 52 ° ⁇ , and a measurement temperature of 25 ° C.
- test tire is assembled with a rim at normal pressure, filled with 230kPa of internal pressure, left in a room at 38 ° C for 24 hours, then the valve core is removed, the internal pressure is set to atmospheric pressure, and the load is 4.17kN (425kg ),
- a drum running test was performed under conditions of speed 89kmZh and indoor temperature 38 ° C. The distance traveled until the failure of each test tire was measured, and the index was displayed with the distance traveled in Comparative Example 1 as 100. The larger the index, the better the run flat durability.
- Each test tire was mounted on a passenger car, a feeling test of ride comfort was conducted by two specialized drivers !, and a score from 1 to 10 was assigned using a 10-point evaluation method, and the average value was obtained. The larger the value, the better the ride comfort.
- N-Cyclohexyl 2-Benzothiazylsulfenamide, “(trademark) Noxeller CZ” manufactured by Ouchi Shinsei Chemical Co., Ltd.
- the rubber composition of the present invention and the run-flat tire using the rubber composition as a side reinforcing layer and Z or bead filler are not good for riding comfort during normal driving.
- the run-flat durability has been greatly improved.
- the rubber composition of the present invention and the run-flat tire using the side reinforcing layer and the Z or bead filler are a passenger car, a light passenger car, a small truck, a small bus, a light truck, a large truck, a large bus, etc.
- the present invention is suitably used for passenger cars.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07741578A EP2009051A4 (en) | 2006-04-18 | 2007-04-13 | RUBBER COMPOSITION AND TIRED TIRES USING THEREOF |
JP2008512093A JPWO2007123060A1 (ja) | 2006-04-18 | 2007-04-13 | ゴム組成物及びそれを用いたランフラットタイヤ |
US12/297,346 US20090084484A1 (en) | 2006-04-18 | 2007-04-13 | Rubber composition and run-flat tire using the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006114321 | 2006-04-18 | ||
JP2006-114321 | 2006-04-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007123060A1 true WO2007123060A1 (ja) | 2007-11-01 |
Family
ID=38624961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/058142 WO2007123060A1 (ja) | 2006-04-18 | 2007-04-13 | ゴム組成物及びそれを用いたランフラットタイヤ |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090084484A1 (ja) |
EP (1) | EP2009051A4 (ja) |
JP (1) | JPWO2007123060A1 (ja) |
CN (1) | CN101421345A (ja) |
WO (1) | WO2007123060A1 (ja) |
ZA (1) | ZA200808664B (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008069207A (ja) * | 2006-09-12 | 2008-03-27 | Toyo Tire & Rubber Co Ltd | 空気入りタイヤ |
JP2009137345A (ja) * | 2007-12-04 | 2009-06-25 | Bridgestone Corp | タイヤ |
JP2014031400A (ja) * | 2012-08-01 | 2014-02-20 | Sumitomo Rubber Ind Ltd | ランフラットタイヤのサイドウォール補強層用ゴム組成物およびランフラットタイヤ |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103012873A (zh) * | 2011-09-26 | 2013-04-03 | 北京橡胶工业研究设计院 | 一种用于缺气保用轮胎胎侧部位的橡胶组合物 |
US8919404B2 (en) | 2012-09-12 | 2014-12-30 | The Goodyear Tire & Rubber Company | Rubber composition for tread groove reinforcement |
JP6007818B2 (ja) * | 2013-02-13 | 2016-10-12 | 株式会社ブリヂストン | ホース用ゴム組成物及びホース |
EP3266820B1 (en) | 2015-03-06 | 2019-10-30 | Bridgestone Corporation | Rubber composition and tire using same |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58113234A (ja) * | 1981-12-26 | 1983-07-06 | Kanebo Ltd | ゴム組成物 |
JPH11310019A (ja) | 1998-04-30 | 1999-11-09 | Bridgestone Corp | 乗用車用空気入りタイヤ |
WO2002002356A1 (en) | 2000-07-03 | 2002-01-10 | Bridgestone Corporation | Pneumatic tire |
JP2002079803A (ja) * | 2000-07-03 | 2002-03-19 | Bridgestone Corp | 空気入りタイヤ |
JP2002105249A (ja) * | 2000-07-28 | 2002-04-10 | Bridgestone Corp | ビードフィラー用ゴム組成物 |
JP2004074960A (ja) | 2002-08-20 | 2004-03-11 | Bridgestone Corp | タイヤ |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US15272A (en) * | 1856-07-08 | Stachiwe for | ||
JPH0618978B2 (ja) * | 1985-10-30 | 1994-03-16 | 日本合成ゴム株式会社 | ゴム組成物 |
US5021522A (en) * | 1988-07-01 | 1991-06-04 | Indspec Chemical Corporation | Rubber compounding resin |
BR9903977A (pt) * | 1998-09-09 | 2000-10-10 | Goodyear Tire & Rubber | Pneumático de operação plana |
US6884832B2 (en) * | 2002-05-09 | 2005-04-26 | The C.P. Hall Company | Adhesion promoter for cord-reinforced rubber and metal or polymer substrate/rubber composites |
JP4510538B2 (ja) * | 2004-07-22 | 2010-07-28 | 東洋ゴム工業株式会社 | ゴム組成物及び空気入りタイヤ |
-
2007
- 2007-04-13 US US12/297,346 patent/US20090084484A1/en not_active Abandoned
- 2007-04-13 JP JP2008512093A patent/JPWO2007123060A1/ja not_active Withdrawn
- 2007-04-13 WO PCT/JP2007/058142 patent/WO2007123060A1/ja active Application Filing
- 2007-04-13 CN CNA200780013738XA patent/CN101421345A/zh active Pending
- 2007-04-13 EP EP07741578A patent/EP2009051A4/en not_active Withdrawn
-
2008
- 2008-10-10 ZA ZA200808664A patent/ZA200808664B/xx unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58113234A (ja) * | 1981-12-26 | 1983-07-06 | Kanebo Ltd | ゴム組成物 |
JPH11310019A (ja) | 1998-04-30 | 1999-11-09 | Bridgestone Corp | 乗用車用空気入りタイヤ |
WO2002002356A1 (en) | 2000-07-03 | 2002-01-10 | Bridgestone Corporation | Pneumatic tire |
JP2002079803A (ja) * | 2000-07-03 | 2002-03-19 | Bridgestone Corp | 空気入りタイヤ |
JP2002105249A (ja) * | 2000-07-28 | 2002-04-10 | Bridgestone Corp | ビードフィラー用ゴム組成物 |
JP2004074960A (ja) | 2002-08-20 | 2004-03-11 | Bridgestone Corp | タイヤ |
Non-Patent Citations (1)
Title |
---|
See also references of EP2009051A4 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008069207A (ja) * | 2006-09-12 | 2008-03-27 | Toyo Tire & Rubber Co Ltd | 空気入りタイヤ |
JP2009137345A (ja) * | 2007-12-04 | 2009-06-25 | Bridgestone Corp | タイヤ |
JP2014031400A (ja) * | 2012-08-01 | 2014-02-20 | Sumitomo Rubber Ind Ltd | ランフラットタイヤのサイドウォール補強層用ゴム組成物およびランフラットタイヤ |
Also Published As
Publication number | Publication date |
---|---|
US20090084484A1 (en) | 2009-04-02 |
JPWO2007123060A1 (ja) | 2009-09-03 |
ZA200808664B (en) | 2009-10-28 |
CN101421345A (zh) | 2009-04-29 |
EP2009051A4 (en) | 2009-11-11 |
EP2009051A1 (en) | 2008-12-31 |
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