WO2001056813A1 - Bande de roulement de pneumatique comprenant un copolymere styrene/butadiene prepare en emulsion - Google Patents
Bande de roulement de pneumatique comprenant un copolymere styrene/butadiene prepare en emulsion Download PDFInfo
- Publication number
- WO2001056813A1 WO2001056813A1 PCT/EP2001/000919 EP0100919W WO0156813A1 WO 2001056813 A1 WO2001056813 A1 WO 2001056813A1 EP 0100919 W EP0100919 W EP 0100919W WO 0156813 A1 WO0156813 A1 WO 0156813A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- copolymer
- sbr
- tire tread
- emulsifier
- tread according
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/10—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl-aromatic monomers
-
- 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
- B60C1/0016—Compositions of the tread
-
- 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
Definitions
- Tire tread comprising a styrene / butadiene copolymer prepared as an emulsion.
- the present invention relates to a tire tread comprising a crosslinkable rubber composition which comprises at least one copolymer of styrene and butadiene prepared in emulsion, and to a method for improving the wear resistance of such a tread.
- the invention applies to a tread mainly comprising carbon black as a reinforcing filler.
- the rubber compositions for tire tread band can comprise, in a known manner, of styrene and butadiene copolymers (also known as SBR in the remainder of the present description), alone or in combination with other elastomers based on desired properties.
- the SBRs were most often prepared as an emulsion, that is to say by associating in an aqueous medium an emulsifier with the monomers.
- This emulsifier fulfills three main functions. It is thus planned:
- the emulsifiers used mainly consist of soaps of fatty acids, such as soaps of capric, lauric, myristic, palmitic, stearic or oleic acid, for example, or of soaps of resin acids (also called resinous soaps or soaps rosin). such as soaps of abietic or hydroabietic type, for example tetrahydroabietic acid.
- Synthetic emulsifiers can also be used, such as aryl sulfate, sodium lauryl sulfonate or cumene peroxide.
- a reduced concentration of emulsifier in said mixture of monomers leads to a significantly reduced polymerization rate.
- SBRs can also be prepared in solution, by anionic polymerization in a hydrocarbon solvent which is carried out by means of a lithiated initiator.
- the SBRs thus prepared have in particular physical characteristics in the vulcanized state and a wear resistance which are satisfactory.
- a major drawback of the usual SBRs prepared in emulsion lies in the high hysteresis presented by the compositions for tire treads which comprise these SBRs, compared to those which comprise SBRs prepared in solution.
- the object of the present invention is to provide a tire tread having improved wear resistance, which comprises a crosslinkable rubber composition comprising, on the one hand, at least one elastomeric copolymer of styrene and butadiene prepared in emulsion and, on the other hand, a reinforcing filler comprising predominantly carbon black (ie according to a mass fraction greater than 50%), so that said carbon black is present in said composition in an equal or greater amount at 55 pce.
- a crosslinkable rubber composition comprising, on the one hand, at least one elastomeric copolymer of styrene and butadiene prepared in emulsion and, on the other hand, a reinforcing filler comprising predominantly carbon black (ie according to a mass fraction greater than 50%), so that said carbon black is present in said composition in an equal or greater amount at 55 pce.
- an SBR prepared as an emulsion in such a way that it has an emulsifier content varying substantially from 1 to 3.5 phr, can be advantageously used in a crosslinkable rubber composition comprising a reinforcing filler as defined above, to significantly improve the wear resistance of a tire tread comprising said composition, compared to that of a tread including a conventional SBR also prepared in emulsion, without penalizing or even improving the other physical properties in the vulcanized state , in particular the hysteretic properties.
- styrene and butadiene copolymers which can be used in the present invention can be prepared by a hot process or by a cold process.
- said carbon black is present in said composition in an amount equal to or greater than 60 phr and, even more preferably, in an amount ranging from 70 phr to 100 phr.
- carbon blacks all carbon blacks are suitable, in particular blacks of the HAF, ISAF, SAF type, conventionally used in tires and particularly in tire treads.
- blacks NI 15, N134, N234, N339, N347, N358, N375 mention may be made of blacks NI 15, N134, N234, N339, N347, N358, N375.
- Carbon black can also be used in cutting (mixing) with a reinforcing white filler.
- the term "reinforcing white filler” means a “white” filler (ie, inorganic, in particular mineral), sometimes also called “clear” filler, capable of reinforcing on its own, without other means than a system. coupling, a rubber composition intended for the manufacture of tires, in other words capable of replacing in its reinforcement function a conventional charge of tire grade carbon black.
- the reinforcing white filler is, in whole or at least mainly, silica (Si ⁇ 2).
- the silica used can be any reinforcing silica known to those skilled in the art, in particular preferential highly dispersible silicas, such as Perkasil KS 430 silica from Akzo, BV 3380 silica from Degussa, Zeosil 1165 MP and 1115 silicas MP from the company Rhodia, the silica Hi-Sil 2000 from the company PPG, the silicas Zeopol 8741 or 8745 from the company Huber, treated precipitated silicas such as for example the silicas "doped" with aluminum described in the application EP -A-0 735 088.
- aluminas of formula A1 0 3
- aluminas with high dispersibility which are described in European patent document EP-A-810 258, or also
- the black / silica blends or the blacks partially or entirely covered with silica are suitable for constituting the reinforcing filler according to the invention.
- carbon blacks modified on the surface with silica such as, without limitation, the fillers described in the European patent document EP-A-711 805 and the fillers which are marketed by the company CABOT under the name of "CRX 2000", and which are described in the international patent document WO-A-96/37547.
- the mass fraction of the latter in said reinforcing filler is preferably chosen to be less than or equal to 30%.
- the tread composition according to the invention also comprises, conventionally, when said reinforcing filler comprises a white reinforcing filler, a reinforcing white filler / elastomer matrix bonding agent (also called coupling agent), which has the function of '' ensuring a sufficient bond (or coupling), of a chemical and / or physical nature, between said white charge and the matrix, while facilitating the dispersion of this white charge within said matrix.
- a reinforcing white filler / elastomer matrix bonding agent also called coupling agent
- the coupling agent optionally used in the rubber compositions according to the invention is advantageously a polysulphurized alkoxysilane, such as a so-called "symmetrical" polysulphurized alkoxysilane.
- a polysulphurized alkoxysilane such as a so-called "symmetrical" polysulphurized alkoxysilane.
- TESPT bis (triethoxysilylpropyl) tetrasulfide or TESPT, of formula [(C2H5 ⁇ ) 3Si (CH2) 3S2J2 5 sold for example by the company Degussa under the name “Si69” (or X50S when it is supported at 50% by weight on carbon black), or under the name “Si75” (disulfide), or also by the company Witco under the name "Silquest A1289".
- the content of bonding agent can be within a range of 0.5 to 15% relative to the weight of reinforcing white filler.
- the tread compositions in accordance with the invention contain, in addition to the elastomer matrix, the reinforcing filler and optionally one or more reinforcing white filler / elastomer binding agents, all or part of the other constituents and additives usually used in rubber compounds. , such as plasticizers, pigments, antioxidants, anti-ozonizing waxes, a vulcanization system based on either sulfur and / or peroxide and / or bismaleimides, vulcanization accelerators, extension oils, possibly one or more agents covering of the reinforcing white filler, such as alkoxysilanes, polyols, amines, etc.
- plasticizers such as plasticizers, pigments, antioxidants, anti-ozonizing waxes, a vulcanization system based on either sulfur and / or peroxide and / or bismaleimides, vulcanization accelerators, extension oils, possibly one or more agents covering of the reinforcing white filler, such as alkoxys
- the tread composition according to the invention may comprise a cutting, on the one hand, of one or more SBRs prepared in emulsion according to a total mass fraction ranging from 50 to 100%, each SBR comprising an emulsifier according to said rate of 1 to 3.5 phr and, on the other hand, of one or more essentially unsaturated diene elastomers according to a total mass fraction ranging from 50 to 0%.
- iene elastomer or rubber in known manner an elastomer derived at least in part (i.e. a homopolymer or a copolymer) from diene monomers (monomers carrying two carbon-carbon double bonds, conjugated or not).
- diene elastomer a diene elastomer derived at least in part from conjugated diene monomers, having a rate of units or units of diene origin (conjugated dienes) which is greater than 15% (% in moles).
- the expression “highly unsaturated” diene elastomer is understood in particular to mean a diene elastomer having a rate of units of diene origin (conjugated dienes) which is greater than 50%, such as:
- butadiene-1,3, 2-methyl-1,3-butadiene, 2,3-di (C1-C5 alkyl) -1,3-butadienes such as for example 2 are suitable.
- Suitable vinyl-aromatic compounds are, for example, styrene, ortho-, meta-, para-methylstyrene, the commercial "vinyl-toluene" mixture, para-tertiobutylstyrene, methoxystvrenes, chl orostyrenes, vinyl mesitylene, divinylbenzene, vinylnaphthalene.
- the copolymers can contain between 99% and 20% by weight of units derived from diene monomers and between 1% and 80% by weight of units derived from vinyl-aromatic monomers.
- the elastomers can have any microstructure which is a function of the polymerization conditions used, in particular the presence or absence of a modifying and / or randomizing agent and the quantities of modifying and / or randomizing agent used.
- the elastomers can for example be block, statistical, sequence, microsequenced, and be prepared in dispersion or in solution; they can be coupled and / or stars or functionalized with a coupling and / or star-forming or functionalizing agent.
- polybutadienes and in particular those having a content of units -1,2 between 4% and 80% or those having a content of cis-1,4 greater than 80%, polyisoprenes, butadiene copolymers- styrene and in particular those having a styrene content of between 5% and 50% by weight and more particularly between 20% and 40%, a content of -1,2 bonds in the butadiene part of between 4% and 65%, a content of trans-1,4 bonds of between 20% and 80%, butadiene-isoprene copolymers and in particular those having an isoprene content of between 5% and 90% by weight and a glass transition temperature (Tg) of - 40 ° C to -80 ° C, isoprene-styrene copolymers and in particular those having a styrene content of between 5% and 50% by weight and a Tg of between -25 ° C and -50 ° C.
- Tg glass
- butadiene-styrene-isoprene copolymers those with a styrene content of between 5% and 50% by weight and more particularly suitable between 10% and 40%, an isoprene content between 15% and 60% by weight and more particularly between 20% and 50%, a butadiene content between 5% and 50% by weight and more particularly between 20 % and 40%, a content of -1.2 units of the butadiene part between 4% and 85%, a content of trans units -1.4 of the butadiene part between 6% and 80%, a content of units -1.2 plus -3.4 of the isoprene part between 5% and 70% and a content of trans units -1.4 of the isoprene part between 10% and 50%, and more generally any butadiene-styrene copolymer -isoprene having a Tg of between -20 ° C and -70 ° C.
- the diene elastomer of the composition in accordance with the invention is chosen from the group of highly unsaturated diene elastomers constituted by polybutadienes (BR), polyisoprenes (IR) or butadiene-styrene copolymers (SBR) , butadiene-isoprene copolymers (BIR), isoprene-styrene copolymers (SIR), butadiene-styrene-isoprene copolymers (SBIR) or a mixture of two or more of these compounds.
- BR polybutadienes
- IR polyisoprenes
- SBR butadiene-styrene copolymers
- BIR butadiene-isoprene copolymers
- SIR isoprene-styrene copolymers
- SBIR butadiene-styrene-isoprene copolymers
- a tire tread according to the invention is such that said or each copolymer comprises said emulsifier in an amount varying substantially from 1 to 2 phr.
- said emulsifier comprises at least one resinic acid and / or at least one fatty acid, in particular oleic acid.
- said or each copolymer has a trans linkage rate which is equal to or greater than 70% and a styrenic linkage rate varying substantially from 20% to 45%.
- the number-average molecular weight of said or each copolymer varies substantially from 110,000 g / mol to 140,000 g / mol.
- a tire according to the invention comprises a tread as defined above.
- G * dynamic shear properties
- the hysteresis is expressed by the measurement of tan delta, at 7% deformation and at 40 ° C according to standard ASTM D2231-71 (re-approved in 1977);
- E-SBR A and E-SBR B each consisting of a copolymer of styrene and butadiene prepared in emulsion in a manner known per se and comprising respectively emulsifier levels of 1.7 phr and 1.2 pce, and
- E-SBR C and E-SBR D (respectively marketed by the company BAYER under the names "KRYNOL 1712" and "KRYNOL 1721”), each consisting of a copolymer of styrene and butadiene prepared as an emulsion and comprising emulsifier levels of 5.7 phr and 4.5 phr respectively.
- Table I summarizes the essential characteristics of microstructure, properties, formulation and macro structure relating to each of the four elastomers tested.
- microstructures were determined according to ISO 6287 standard.
- rate of emulsifier have been determined according to ISO 1407 (for the amount of acetone extract) and in accordance with ASTM D297 (for the unsaponifiable rate).
- the E-SBR A and E-SBR B of the invention each have a microstructure similar to that of the E-SBR C and of the “control” E-SBR D.
- E-SBR A and the E-SBR B of the invention each have: a level of fatty acids (essentially consisting of stearic and palmitic acid) which is less than one-tenth that of E-SBR C and E-SBR D "control", and
- Interface temperature 280 ° C.
- palmitic acid 6PPD stearic acid oleic acid.
- myristic acid (14 carbon atoms) palmitic acid 6PPD stearic acid oleic acid.
- a first “control” composition ® of tread which comprises a cutting of an S-SBR prepared in solution and of a polybutadiene (BR) with a high rate of cis, and
- composition of tread which comprises cutting said “control” elastomers E-SBR C and E-SBR D prepared in emulsion.
- said polybutadiene is characterized by a cis-1,4 linkage rate of approximately 93% and it is for example obtained by the process described in the French patent document FR-A-1 436 607.
- Table II below reports, on the one hand, the formulation of each of the above-mentioned rubber compositions and, on the other hand, the processing properties (in the unvulcanized state) and the physical properties ( in the vulcanized state) obtained for these same compositions.
- This table II shows that the elastomers E-SBR A and E-SBR B confer on the rubber composition according to the invention processing properties which are analogous to those conferred by S-SBR on the corresponding “control” composition. ®.
- This table II also shows that the stiffness in the vulcanized state of the composition according to the invention is analogous to that of the “control” composition ⁇ based on traditional SBR emulsions.
- This table III shows that the elastomers E-SBR A and E-SBR B confer on the composition according to the invention a hysteresis reduced compared to that imparted by the composition "control" ⁇ based on usual SBR emulsion (tg ⁇ at 7% deformation).
- a wear resistance test was carried out for a tire with a tread according to the invention with dimensions of 175/70 R14 and of model “MXT”, and for tires of the same dimensions and of the same model comprising strips that correspond to said "witnesses" ® and ⁇ .
- the wear resistances were determined by means of a relative wear index which is a function of the remaining rubber height, after driving on a hazy road circuit and until the wear reaches the wear indicators. wear arranged in the grooves of the treads.
- treads ® i.e. treads ®
- a relative wear index which is higher than this base 100 accounts for an improved wear resistance compared to that of said tread ®.
- the wear results are set out in Table IV below.
- the wear resistance of the tread according to the invention is improved by 19% compared to that of a tread comprising E-SBRs with a higher emulsifier rate. at 4 pce, such as the tread ⁇ . It will be noted that this improvement in the resistance to wear is essentially due to the reduced rate of emulsifier in the tread composition according to the invention compared to the composition ⁇ .
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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)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01905700A EP1173337A1 (fr) | 2000-02-02 | 2001-01-29 | Bande de roulement de pneumatique comprenant un copolymere styrene/butadiene prepare en emulsion |
BR0104302-1A BR0104302A (pt) | 2000-02-02 | 2001-01-29 | Banda de rodagem de pneumático, pneumático, e, processo de melhoria da resistência ao desgaste de uma banda de rodagem de pneumático |
AU33718/01A AU3371801A (en) | 2000-02-02 | 2001-01-29 | Tyre tread comprising an emulsion styrene/butadiene copolymer |
JP2001556684A JP2003521575A (ja) | 2000-02-02 | 2001-01-29 | スチレン−ブタジエンエマルジョンコポリマーを含むタイヤトレッド |
CA002368002A CA2368002A1 (fr) | 2000-02-02 | 2001-01-29 | Bande de roulement de pneumatique comprenant un copolymere styrene/butadiene prepare en emulsion |
US09/968,285 US20020077408A1 (en) | 2000-02-02 | 2001-10-01 | Tire tread comprising a styrene/butadiene emulsion copolymer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR00/01338 | 2000-02-02 | ||
FR0001338 | 2000-02-02 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/968,285 Continuation US20020077408A1 (en) | 2000-02-02 | 2001-10-01 | Tire tread comprising a styrene/butadiene emulsion copolymer |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001056813A1 true WO2001056813A1 (fr) | 2001-08-09 |
Family
ID=8846601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/000919 WO2001056813A1 (fr) | 2000-02-02 | 2001-01-29 | Bande de roulement de pneumatique comprenant un copolymere styrene/butadiene prepare en emulsion |
Country Status (10)
Country | Link |
---|---|
US (1) | US20020077408A1 (fr) |
EP (1) | EP1173337A1 (fr) |
JP (1) | JP2003521575A (fr) |
CN (1) | CN1362917A (fr) |
AU (1) | AU3371801A (fr) |
BR (1) | BR0104302A (fr) |
CA (1) | CA2368002A1 (fr) |
RU (1) | RU2250835C2 (fr) |
WO (1) | WO2001056813A1 (fr) |
ZA (1) | ZA200107949B (fr) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4475736B2 (ja) * | 2000-05-02 | 2010-06-09 | 住友ゴム工業株式会社 | ゴム組成物およびそれを用いた空気入りタイヤ |
US7928157B2 (en) * | 2007-09-10 | 2011-04-19 | The Goodyear Tire & Rubber Company | Tire with tread having enhanced wet traction |
FR2958295B1 (fr) * | 2010-03-31 | 2012-05-04 | Michelin Soc Tech | Pneumatique dont la bande de roulement comporte une composition de caoutchouc comprenant une resine poly(vinylester). |
KR101314783B1 (ko) * | 2010-11-29 | 2013-10-08 | 한국타이어 주식회사 | 타이어 트레드용 고무 조성물 및 이를 이용하여 제조한 타이어 |
EP3029099B1 (fr) | 2011-02-23 | 2018-04-04 | Bridgestone Corporation | Composition de caoutchouc et pneu produit à l'aide de celle-ci et procédé de production d'une composition de caoutchouc |
JP5795862B2 (ja) * | 2011-02-23 | 2015-10-14 | 株式会社ブリヂストン | ゴム組成物及びそれを用いた空気入りタイヤ |
JP5649515B2 (ja) * | 2011-05-25 | 2015-01-07 | 株式会社ブリヂストン | ゴム組成物の製造方法 |
FR2974808B1 (fr) * | 2011-05-06 | 2013-05-03 | Michelin Soc Tech | Pneumatique dont la bande de roulement comporte un sbr emulsion a haut taux de trans. |
RU2571135C2 (ru) | 2011-06-03 | 2015-12-20 | Бриджстоун Корпорейшн | Резиновая смесь и шина, изготовляемая с ее использованием |
CN103958592B (zh) | 2011-10-24 | 2015-08-26 | 普利司通美国轮胎运营有限责任公司 | 二氧化硅填充的橡胶组合物及其制备方法 |
BR112014009780A2 (pt) * | 2011-10-24 | 2017-06-13 | Bridgestone Americas Tire Operations Llc | composição de borracha preenchida com sílica e método de produção da mesma |
JP5977517B2 (ja) * | 2011-12-26 | 2016-08-24 | 株式会社ブリヂストン | ゴム組成物の製造方法、そのゴム組成物及びそれを用いた空気入りタイヤ |
DE102012103273A1 (de) * | 2012-04-16 | 2013-10-17 | Continental Reifen Deutschland Gmbh | Kautschukmischung |
US9879131B2 (en) | 2012-08-31 | 2018-01-30 | Soucy Techno Inc. | Rubber compositions and uses thereof |
WO2015054779A1 (fr) | 2013-10-18 | 2015-04-23 | Soucy Techno Inc. | Compositions de caoutchouc et leurs utilisations |
WO2015089647A1 (fr) | 2013-12-19 | 2015-06-25 | Soucy Techno Inc. | Compositions de caoutchouc et leurs utilisations |
US10179479B2 (en) | 2015-05-19 | 2019-01-15 | Bridgestone Americas Tire Operations, Llc | Plant oil-containing rubber compositions, tread thereof and race tires containing the tread |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5753544A (en) * | 1980-09-17 | 1982-03-30 | Toyo Tire & Rubber Co Ltd | Passenger tire tread composition |
FR2775289A1 (fr) * | 1998-02-23 | 1999-08-27 | Goodyear Tire & Rubber | Articles en caoutchouc styrene-butadiene |
EP0942042A2 (fr) * | 1998-03-11 | 1999-09-15 | The Goodyear Tire & Rubber Company | Caoutchouc styrène-butadiène préparé en émulsion |
-
2001
- 2001-01-29 BR BR0104302-1A patent/BR0104302A/pt active Search and Examination
- 2001-01-29 WO PCT/EP2001/000919 patent/WO2001056813A1/fr not_active Application Discontinuation
- 2001-01-29 AU AU33718/01A patent/AU3371801A/en not_active Abandoned
- 2001-01-29 CN CN01800125A patent/CN1362917A/zh active Pending
- 2001-01-29 JP JP2001556684A patent/JP2003521575A/ja active Pending
- 2001-01-29 EP EP01905700A patent/EP1173337A1/fr not_active Withdrawn
- 2001-01-29 CA CA002368002A patent/CA2368002A1/fr not_active Abandoned
- 2001-01-29 RU RU2001129532/11A patent/RU2250835C2/ru not_active IP Right Cessation
- 2001-09-27 ZA ZA200107949A patent/ZA200107949B/en unknown
- 2001-10-01 US US09/968,285 patent/US20020077408A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5753544A (en) * | 1980-09-17 | 1982-03-30 | Toyo Tire & Rubber Co Ltd | Passenger tire tread composition |
FR2775289A1 (fr) * | 1998-02-23 | 1999-08-27 | Goodyear Tire & Rubber | Articles en caoutchouc styrene-butadiene |
EP0942042A2 (fr) * | 1998-03-11 | 1999-09-15 | The Goodyear Tire & Rubber Company | Caoutchouc styrène-butadiène préparé en émulsion |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Section Ch Week 198218, Derwent World Patents Index; Class A12, AN 1982-36497E, XP002148843 * |
Also Published As
Publication number | Publication date |
---|---|
US20020077408A1 (en) | 2002-06-20 |
CA2368002A1 (fr) | 2001-08-09 |
EP1173337A1 (fr) | 2002-01-23 |
CN1362917A (zh) | 2002-08-07 |
AU3371801A (en) | 2001-08-14 |
JP2003521575A (ja) | 2003-07-15 |
BR0104302A (pt) | 2002-01-08 |
ZA200107949B (en) | 2003-08-08 |
RU2250835C2 (ru) | 2005-04-27 |
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