GB2224031A - A pneumatic vehicle tyre - Google Patents
A pneumatic vehicle tyre Download PDFInfo
- Publication number
- GB2224031A GB2224031A GB8921443A GB8921443A GB2224031A GB 2224031 A GB2224031 A GB 2224031A GB 8921443 A GB8921443 A GB 8921443A GB 8921443 A GB8921443 A GB 8921443A GB 2224031 A GB2224031 A GB 2224031A
- Authority
- GB
- United Kingdom
- Prior art keywords
- inner layer
- rubber
- pneumatic vehicle
- tyre
- vehicle tyre
- 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.)
- Granted
Links
- 229920001971 elastomer Polymers 0.000 claims description 54
- 239000005060 rubber Substances 0.000 claims description 54
- 239000000203 mixture Substances 0.000 claims description 43
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000005855 radiation Effects 0.000 claims description 8
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000004753 textile Substances 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000004073 vulcanization Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- -1 Chlorobutyl Chemical group 0.000 description 3
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 229920005556 chlorobutyl Polymers 0.000 description 3
- 229920005555 halobutyl Polymers 0.000 description 3
- 125000004968 halobutyl group Chemical group 0.000 description 3
- 229920003052 natural elastomer Polymers 0.000 description 3
- 229920001194 natural rubber Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011115 styrene butadiene Substances 0.000 description 2
- 239000010692 aromatic oil Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
-
- 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
- B60C1/0008—Compositions of the inner liner
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D2030/0682—Inner liners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2030/00—Pneumatic or solid tyres or parts thereof
- B29L2030/008—Innerliners
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tyre Moulding (AREA)
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Description
n o') : 2,/_ 4 0 3 1 A pneumatic vehicle tyre.
The invention relates to a pneumatic vehicle tyre having a carcass, more especially a radial carcase, which is provided with textile reinforcing members, and having an inner layer of low gas-permeability, which extends radially with respect to the carcase and is formed from a vulcanisable rubber mixture.
In pneumatic vehicle tyres, the tyre interior is formed by a rubber layer of low gas-permeability situated radially within the carcase and ensures that the compressed air, with the required pressure value and the necessary air volume, permits the tyre to operate reliably when viewed over a long period of time.
Vulcanisable rubber mixtures containing halobutyl are utilised as rubber inner layers of low gas-permeability. Low gas-permeability values can thus be attained, measured M2 -17 in 10 which ensure the required air pressure and volume values for the pneumatic vehicle tyre when viewed over a long period of time. However, the vulcanisable rubber mixtures, which contain halobutyl or are formed therefrom, have a relatively low mechanical strength.
The object of the invention is to develop a rubber inner layer of low gaspermeability for this type of tyre in such a manner that it has a high mechanical strength and also attains gas-permeability values which are comparable with those of the rubber layers containing halobutyl.
Furthermore, the rubber mixture for the inner layer of the tyre should be initially or partially cross-linkable, and the pneumatic tyres should be vulcanisable without a heating bellows as a result of such an inner layer.
d 1 In accordance with the invention there is provided Ea pneumatic vehicle tyre having a carcass, more especially a radial carcass, which is provided with textile reinforcing members, and having an inner layer of low gas-pErmEability, which extends radially with respect to the carcase and is formed from a vulcanisable rubber mixture in which the inner layer is formed from a blended mixture of at least one styrene-containing, emulsion- or solution-polymerised styrene-butediene copolymer and from at least one adhesive rubber, wherein the content of styrene, which is bound in the molecule, is at least 15 parts by weight per hundred parts of rubber.
is The blended rubber mixture also contains conventional reinforcing fillers, as well as vulcanising agents and micro-chemicals.
Because there is a relatively small content of bound styrene in the region of at least 15 parts by weight per hundred parts of rubber in the blended rubber mixture, a mechanical strength is achieved, on the one hand, for the rubber inner layer which is at least in the region of 10 M Pa, and a relatively low gas-permeability value is also m2 -17 achieved, on the other hand, in the region of 3--_-'_. 10 3. fja These two properties ensure that the compressed air values and compressed air volumes permit the tyre to operate reliably when viewed over a long period of time.
Because of the above-mentioned, relatively small styrene content in the blended mixture for an inner layer, this mixture can only advantageously be partially or initially or prevulcanised in operational terms. A membrane like, sufficiently strong skin is thus formed. In consequence, a vulcanisation method without bellows is possible with additional advantages.
i i The initial cross-linking may be achieved by conventional means in the form of sulphur accelerator systems or by electron radiation. In such a case, the rubber mixture does not become decomposed as a result of the effect of the electron beams, such as is the case with a rubber mixture containing butyl.
The method of electron radiation is known, compare in this connection the journal entitled 11Elastomericll, 117 (11) 34, 1985, and the use of electron radiation for producing rubber mixtures is known from DE-A-37 05 761.
The rubber mixture with a relatively small bound styrene content for the rubber inner layer may be initially cross-linked either as a separate rubber layer or as a component part of the unvulcanised tyre. The strong form of the membrane-like skin of the initially cross-linked inner layer assumes the function of the heating bellows.
In such a case, vulcanisation without a heating bellows presents considerable advantages in terms of a saving in energy and in the production means, namely the bellows and its accessories.
Smaller material and production costs are required. The heating period is shortened, and the tyre output figures are increased when compared with the standard method cif valcanisation utilising a heating bellows.
The additional advantages of the rubber mixture with a relatively small styrene content are its simple, operational p=cessability and its good adhesive strength with respect to the adjacent carcase ply.
A 1 4 This rubber inner layer is preferably to be combined with a carcase ply, whereby there is a relatively small content of at least 20 parts by weight of bound styrene per hundred parts of rubber. Similar rubber mixtures according to DE-A-36 36 783 and 37 41 722 have been proposed for the carcase. Just like the mixture for the inner layer, the blended mixture for the carcase ply has a bound styrene content of at least 20 parts by weight per hundred parts of rubber and is initially or partially cross-linkable either by means of heat and pressure with the utilisation of sulphur accelerator systems or by means of electron radiation. The additional advantages which are achieved reside in reducing the costs for the raw materials, improving the operational processability, providing the adjacent plies with a high degree of adhesion with respect to one another, and improving the mechanical strength. Advantageous gas-permeability values are achieved, which are comparable with those achieved by combining the materials of the carcase ply and a butyl inner layer.
The invention is explained with reference to embodiments, the inner layer of the invehtion being compared with a known inner layer, and comparable values for carcase plies also being mentioned.
Q j Table 1
1 1 Conposition of the rubber mixture 100 parts weight per hundred parts rubber weight Rubber mixture A B C D Inner Carcase Inner Carcase layer layer Styrene-butadiene copolymer 1500 30 20 30 Styrene-butadiene copolyner 1013 25 40 - Bound styrene is 22 7 Natural rubber Folybutadiene Chlorobutyl 40 40 50 - 20 GFF I.JJ-660 carbon black C5 5 85 41 45 Aromatic oil 22 9 5 8 m 2 Gas-permeability.p., 30C 501C 7WC -17 3.5 3. C 1.7 8. C 8.3 6.9 4.7 21.0 1-1.3 110.1 101 0 3-1.0 Mechanical strength XFa 10.5 14.3 6.1 12. C Table 2
Pneumatic vehicle tyre 1 Pneumatic vehicle tyre 2 Pneumatic veLicle tyre 3 Tyre size 205/65 VR 15 Type tubeless Carcase rubber mixture D Inner layer rubber mixture c 205/65 VR 15 tubeless E B# 205/G5 VR 15 tubeless B A Loss of compressed air per day 0.1 bar 18 at 35C 21 Remark: The rubber mixture B' corresponds to the rubber mixture E for a carcase mixture which is utilised here as the mixture for the inner layer.
When the rubber mixture A of the invention is compared with a known rubber mixture C, it is apparent that the inner layer, which is produced from the rubber mixture A comprising styrene-butadiene copolymars and natural rubber with a bound styrene content of 18 according to Table 1, has the gas-permeability values of 3.5, 8.3 and 17.3 compare the relevant column and the mechanical strength value of 10.5 MPa compare the relevant column. However, the known inner layer according to rubber mixture C, which comprises chlorobutyl and natural rubber, has the gas- permeability values of 1.7, 4.7 and 10.0 and a strength value of 6.1 We.
The gas-permeability of the inner layer of the tyre is sufficiently good, and the strength is considerably improved.
7 -10 is It is apparent from Table 2 that, by combining a carcase ply with the inner layer formed from a rubber mixture of the invention, the values for the loss of air from the tyre are comparable with the values of the known embodiment. However, the carcase ply and the inner layer have the additional, significant advantages that considerably reduced costs are achieved for the raw materials and production method, and that a substantially more advantageous, operational processability of the raw materials is provided. On the whole, therefore, the costs are less than those for a rubber layer containing chlorobutyl. The additional advantages of the inner layer formed from a rubber mixture of the invention are its improved mechanical strength and its high adhesive strength with respect to the adjacent carcase ply. The rubber mixture of the invention is initially or partially cross-linkable, so that a sufficiently strong membrane-like skin is hereby produced, which permits the unvulcanised tyre, provided with such an initially crosslinked inner layer, to be used for the vulcanisation of pneumatic vehicle tyres without utilisation of a bellows.
The rubber mixture, containing the -styrene-butadiene copolymer component, is preheated, for example, at a temperature of 1BO'C for approximately five minutes. It then forms a membrane-like skin, as mentioned above. This is sufficiently strong and impermeable, so that it can absorb the heating medium of water and/or vapour during the vulcanisation of a tyre without a bellows. In this case, the previously treated inner layer of the unvulcanised tyre assumes the function of the heating bellows.
The blended rubber mixture, which contains the styrenebutadiene copolymer component and has a small styrene content, is also suitable for being initially crosslinkable by means of electron radiation. In such a B case, energy concentrations of approximately 2 to 16 M rad are suitable for solidifying the rubber mixture to form a membrane-like skin so that, even in this case, the previously treated inner layer of the unvulcanised tyre can assume the function of the heating bellows. The radiation treatment may be effected in such a manner that either the inner layer ply in the region of the production process in the calendar is subjected to a radiation field, or the inner layer of the already built, unvulcanised tyre is locally radiated by electrons. Because vulcanisation is achieved without a bellows, the entire method for vulcanising pneumatic vehicle tyres can be accomplished with the above-mentioned advantages.
i 1 9
Claims (10)
1. A pneumatic vehicle tyre having a carcase, more especially a radial carcase, which is provided with textile reinforcing members, and having an inner layer of low gas-permeability, which extends radially with respect to the carcase and is formed from a vulcanisable rubber mixture, in which the inner layer is formed from a blended mixture of at least one styrene-containing, emulsion- or solution-pDlymerised styrene-butadiene copolymer and from at least one adhesive rubber, wherein the content of styrene, which is bound in the molecule, is at least 15 parts by weight per hundred parts of rubber.
2. A pneumatic vehicle tyre as claimed in claim 1, in which the inner layer is combined with a carcase ply which.is formed from at least one styrene-butadiene copolymer and at least one adhesive rubber, wherein the content of styrene, which is bound in the molecule, is at least 20 parts by weight per hundred parts of rubber.
3. A pneumatic vehicle tyre as claimed in claim 1 or 2, in which the rubber mixture of the inner layer is a rubber mixture which is partially vulcanisable or initially vulcanisable by means of a sulphur accelerator system as a result of pressure and heat.
4. A pneumatic vehicle tyre as claimed in claim 1 or 2, in which the rubber mixture of the inner layer is a rubber mixture which is partially vulcanisable or initially vulcanisable by means of electron radiation.
5. A pneumatic vehicle tyre as claimed in claim 3 or 4, in which the inner layer is partially or initially vulcanisable as a component part of the tyre.
6. A pneumatic vehicle tyre as claimed in claim 3 or 4, in which the inner layer of the unvulcanised tyre is partially or initially vulcanisable.
7. A pneumatic vehicle tyre as claimed in claim 2, in which the blended mixture for the carcase ply, having a bound styrene content of at least 20 parts by weight per hundred parts of rubber, is partially or initially vulcanisable.
8. A pneumatic vehicle tyre, as claimed in any preceding claim, substantially as hereinbefore described.
9. A method of vulcanising a pneumatic vehicle tyre as claimed in claims 1 to 8, in which the unvulcanised tyre, having an inner layer which is in the form of a strong inner skin as a result of initial or partial cross-linking, is introduced into the vulcanising press and, when the vulcanising press is closed, absorbs the vulcanising pressure medium, which is in the form of hat water and/or vapour, without a heating bellows, and this unvulcanised tyre is vulcanised as a result of pressure and heat.
10. A method of vulcanising a pneumatic vehicle tyre as claimed in claim 9, substantially as hereinbefore described.
Published 1990 atThe Patent OVIce, State House,66.171 High Holborn,London WClR4TP. Further coplesmaybe obtainedfromThe Patent Offtce. Sales Branch, St Mary Cray, Orpington, Kent BR5 3RD. Printed by Multiplex techniques ltd, St Mary Cray, Kent, Con. 1187
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3832487A DE3832487C2 (en) | 1988-09-24 | 1988-09-24 | Process for manufacturing a pneumatic vehicle tire |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8921443D0 GB8921443D0 (en) | 1989-11-08 |
| GB2224031A true GB2224031A (en) | 1990-04-25 |
| GB2224031B GB2224031B (en) | 1992-10-14 |
Family
ID=6363635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8921443A Expired - Lifetime GB2224031B (en) | 1988-09-24 | 1989-09-22 | A pneumatic vehicle tyre |
Country Status (5)
| Country | Link |
|---|---|
| DE (1) | DE3832487C2 (en) |
| ES (1) | ES2021175A6 (en) |
| FR (1) | FR2636889B1 (en) |
| GB (1) | GB2224031B (en) |
| IT (1) | IT1232321B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998042499A1 (en) * | 1997-03-25 | 1998-10-01 | The Goodyear Tire & Rubber Company | Vulcanized innerliner and method of utilizing the same for pneumatic tyres |
| WO2000030839A1 (en) * | 1998-11-25 | 2000-06-02 | The Goodyear Tire & Rubber Company | Continuous cured innerliner for tyres |
| WO2000030838A1 (en) * | 1998-11-25 | 2000-06-02 | The Goodyear Tire & Rubber Company | Hot forming system to produce pre-cured innerliners |
| EP1086977A2 (en) * | 1999-09-22 | 2001-03-28 | The Goodyear Tire & Rubber Company | Partially vulcanized shaped rubber composition and preparation of article, including tires, having a component thereof |
| US6632308B1 (en) | 1999-11-24 | 2003-10-14 | The Goodyear Tire & Rubber Company | Continuous cured innerliner for tires |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2685666A1 (en) * | 1991-12-31 | 1993-07-02 | Michelin & Cie | TIRES WITHOUT TUBES AND METHODS OF MAKING SAME. |
| US8114335B2 (en) | 2002-12-30 | 2012-02-14 | The Goodyear Tire & Rubber Company | Partial depth-wise cure of a tire inner liner |
| DE102004031811A1 (en) * | 2004-07-01 | 2006-02-16 | Continental Aktiengesellschaft | Radial pneumatic tire with emergency running ability for motor vehicles has pre-vulcanized reinforcing profile in each sidewall |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB786131A (en) * | 1955-03-03 | 1957-11-13 | Us Rubber Co | Improvements in tubeless tyre |
| GB983357A (en) * | 1963-02-20 | 1965-02-17 | Texas Us Chem Co | Pneumatic tyres having good air retention characteristics |
| GB2198138A (en) * | 1986-10-29 | 1988-06-08 | Uniroyal Englebert Gmbh | A pneumatic vehicle tyre |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU32806A1 (en) * | 1953-06-17 | |||
| GB839394A (en) * | 1956-10-01 | 1960-06-29 | Firestone Tire & Rubber Co | Improvements in a tubeless pneumatic tyre or other laminated article comprising a natural rubber layer bonded to a synthetic rubber layer |
| FR1338006A (en) * | 1961-10-10 | 1963-09-20 | Gen Tire & Rubber Co | Improvements to tubeless tires and rubber compositions used |
| FR1384365A (en) * | 1963-02-20 | 1965-01-04 | Texas Us Chem Co | Rubber composition, in particular for tires |
| US4368015A (en) * | 1980-08-23 | 1983-01-11 | Kabushiki Kaisha Kobe Seiko Sho | Tire vulcanizer |
| US4776909A (en) * | 1986-07-28 | 1988-10-11 | The Firestone Tire & Rubber Company | Method for making coextruded seamless tubular tire bodies for use in pneumatic tires |
| DE3741722A1 (en) * | 1986-10-29 | 1989-06-22 | Uniroyal Englebert Gmbh | Pneumatic tyre for vehicles |
| DE3705761A1 (en) * | 1987-02-24 | 1988-09-01 | Uniroyal Englebert Gmbh | TUBELESS AIR TIRE |
-
1988
- 1988-09-24 DE DE3832487A patent/DE3832487C2/en not_active Expired - Fee Related
-
1989
- 1989-09-08 IT IT8921662A patent/IT1232321B/en active
- 1989-09-21 ES ES898903194A patent/ES2021175A6/en not_active Expired - Lifetime
- 1989-09-22 GB GB8921443A patent/GB2224031B/en not_active Expired - Lifetime
- 1989-09-22 FR FR8912469A patent/FR2636889B1/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB786131A (en) * | 1955-03-03 | 1957-11-13 | Us Rubber Co | Improvements in tubeless tyre |
| GB983357A (en) * | 1963-02-20 | 1965-02-17 | Texas Us Chem Co | Pneumatic tyres having good air retention characteristics |
| GB2198138A (en) * | 1986-10-29 | 1988-06-08 | Uniroyal Englebert Gmbh | A pneumatic vehicle tyre |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998042499A1 (en) * | 1997-03-25 | 1998-10-01 | The Goodyear Tire & Rubber Company | Vulcanized innerliner and method of utilizing the same for pneumatic tyres |
| US6277317B1 (en) | 1997-03-25 | 2001-08-21 | The Goodyear Tire & Rubber Company | Method for building pneumatic tires in an improved tire mold |
| WO2000030839A1 (en) * | 1998-11-25 | 2000-06-02 | The Goodyear Tire & Rubber Company | Continuous cured innerliner for tyres |
| WO2000030838A1 (en) * | 1998-11-25 | 2000-06-02 | The Goodyear Tire & Rubber Company | Hot forming system to produce pre-cured innerliners |
| US7189298B1 (en) | 1998-11-25 | 2007-03-13 | The Goodyear Tire & Rubber Company | Hot forming system to produce pre-cured innerliners |
| EP1086977A2 (en) * | 1999-09-22 | 2001-03-28 | The Goodyear Tire & Rubber Company | Partially vulcanized shaped rubber composition and preparation of article, including tires, having a component thereof |
| EP1086977A3 (en) * | 1999-09-22 | 2004-03-03 | The Goodyear Tire & Rubber Company | Partially vulcanized shaped rubber composition and preparation of article, including tires, having a component thereof |
| US6632308B1 (en) | 1999-11-24 | 2003-10-14 | The Goodyear Tire & Rubber Company | Continuous cured innerliner for tires |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8921662A0 (en) | 1989-09-08 |
| GB8921443D0 (en) | 1989-11-08 |
| FR2636889A1 (en) | 1990-03-30 |
| DE3832487C2 (en) | 2000-04-20 |
| ES2021175A6 (en) | 1991-10-16 |
| FR2636889B1 (en) | 1994-05-27 |
| DE3832487A1 (en) | 1990-03-29 |
| GB2224031B (en) | 1992-10-14 |
| IT1232321B (en) | 1992-01-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20010922 |