EP0000839B1 - Improvements in or relating to friction materials - Google Patents
Improvements in or relating to friction materials Download PDFInfo
- Publication number
- EP0000839B1 EP0000839B1 EP78300258A EP78300258A EP0000839B1 EP 0000839 B1 EP0000839 B1 EP 0000839B1 EP 78300258 A EP78300258 A EP 78300258A EP 78300258 A EP78300258 A EP 78300258A EP 0000839 B1 EP0000839 B1 EP 0000839B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- friction material
- material according
- friction
- binder
- volume
- 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.)
- Expired
Links
- 239000002783 friction material Substances 0.000 title claims description 23
- 239000000203 mixture Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 22
- 239000011230 binding agent Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 9
- 229920001187 thermosetting polymer Polymers 0.000 claims description 8
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 7
- 229920001568 phenolic resin Polymers 0.000 claims description 7
- 239000010425 asbestos Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 239000012763 reinforcing filler Substances 0.000 claims description 6
- 229910052895 riebeckite Inorganic materials 0.000 claims description 6
- 239000003607 modifier Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229920000459 Nitrile rubber Polymers 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 2
- 241000276489 Merlangius merlangus Species 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- NVWBARWTDVQPJD-UHFFFAOYSA-N antimony(3+);trisulfide Chemical compound [S-2].[S-2].[S-2].[Sb+3].[Sb+3] NVWBARWTDVQPJD-UHFFFAOYSA-N 0.000 claims description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000011256 inorganic filler Substances 0.000 claims description 2
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 229910052718 tin Inorganic materials 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- 229910001369 Brass Inorganic materials 0.000 claims 1
- 239000010951 brass Substances 0.000 claims 1
- 239000011135 tin Substances 0.000 claims 1
- 239000004636 vulcanized rubber Substances 0.000 claims 1
- 238000009472 formulation Methods 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 235000015096 spirit Nutrition 0.000 description 1
- 239000004634 thermosetting polymer Substances 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/025—Compositions based on an organic binder
- F16D69/026—Compositions based on an organic binder containing fibres
Definitions
- This invention relates to friction materials, and more preferably to friction materials of the kind used for brake pads, brake linings, clutch facings and similar uses.
- Friction materials of this kind are generally composed of a thermoset binder, an inorganic fibrous reinforcement and various fillers and other additives. These compositions are required to withstand severe operating temperatures and pressures under repeated application without failure or deterioration in friction properties and the fibrous reinforcement generally used is asbestos. Numerous proposals have been made of compositions containing other inorganic fibrous reinforcement but such materials have so far found limited commercial acceptance.
- an asbestos-free friction material composition comprises a thermosetting binder containing phenol-formaldehyde resin, a fibre based reinforcement including steel fibres and other fillers and additives characterised in that:-
- the steel fibres are fine, e.g. 0.125 mm diam., and with a length in the range 1 to 5 mm.
- the steel may be mild steel.
- the fibre-based reinforcement is a mixture of materials, one at least of which is staple steel fibre.
- Other reinforcing materials which may be included in the mixture in powder form include reinforcing fillers such as mica and wollastonite, and milled glass fibre.
- the thermoset binder includes a thermoset resin based on a phenol-formaldehyde resin but may also include a heat and chemical resistant vulcanised rubber, such as a nitrile rubber. Preferably a mixture of such materials is used of which the phenol-formaldehyde resin material constitutes at least half.
- a rubber When a rubber is used it may be incorporated into the friction material in the form of a powder but is preferably incorporated in the form of a solution in a suitable organic solvent and a vulcanising agent such as sulphur is also used.
- thermoset binder is preferably in the range 20 to 32% by volume of the friction material.
- various other materials may be included as fillers, friction and wear modifiers etc. the proportions of which can be varied to adjust the friction and other properties of the materials.
- the preferred additives are particulate fillers, more preferably a mixture of such materials and friction and wear modifying materials.
- the particulate fillers will' generally be present in an amount between 10 and 50% by volume and may include such fillers as barytes, whiting, silica etc.
- friction and wear modifiers are carbon, graphite, antimony trisulphide and molybdenum disulphide and metals, in a finely divided form.
- suitable metals are copper and tin. A mixture of such materials may be used, and the total amount of such materials may be up to 40% by volume.
- the friction materials of the present invention are particularly suited to be manufactured by a press-molding technique in which all the ingredients of the material are compounded together, the compounded mix disintegrated and (optionally dried) and then moulded into a component such as a brake pad in a die under pressure. The moulded component is then removed from the die and baked to cure the binder.
- the invention provides friction materials which do not contain asbestos, and yet have comparable properties to asbestos-based friction materials.
- Example 1 sample disc-brake pads were manufactured according to the formulation given below in Table I. The ingredients were initially compounded together, the nitrile rubber being introduced into the mixture as a powder and the compound was disintegrated and dried.
- the material was then moulded into pads under pressure in a die and the mouldings baked in an oven to cure the binder.
- sample pads produced were tested and found to have friction properties comparable to asbestos-containing materials.
- Sample disc-brake pads were manufactured according to the formulations given below in Table II. The ingredients were initially compounded together, the nitrile rubber being introduced into the mixture as a 15-20% solids content solution in trichloroethylene, and the phenol-formaldehyde resin as a 70% solids content solution in methylated spirits. The compound was disintegrated and dried and then moulded into pads under pressure in a die and the mouldings baked in an oven to cure the binder.
- Example 2 the reinforcement was a mixture of Steel Fibres and mica (as in Example 1) but in Example 3 the reinforcement was a mixture of the steel fibres and milled E Glass, the latter being a dust composed of very short lengths of milled glass fibre.
- the binder included equal amounts of rubber and resin.
- the wear of the material of Example 2 was as good as, or better than, most conventional materials of comparable friction level.
- the wear of the material of Example 3 was reasonable for the level of friction, although higher than that of the materials of Example 2.
- Example 2 The assembly shear strength of two pads of each material were measured, the values obtained for Example 2 being 16065 and 14755 KN/m 2 and those for Example 3 being 16134 and 15375 KN/m 2 .
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
- This invention relates to friction materials, and more preferably to friction materials of the kind used for brake pads, brake linings, clutch facings and similar uses.
- Friction materials of this kind are generally composed of a thermoset binder, an inorganic fibrous reinforcement and various fillers and other additives. These compositions are required to withstand severe operating temperatures and pressures under repeated application without failure or deterioration in friction properties and the fibrous reinforcement generally used is asbestos. Numerous proposals have been made of compositions containing other inorganic fibrous reinforcement but such materials have so far found limited commercial acceptance.
- According to the present invention an asbestos-free friction material composition comprises a thermosetting binder containing phenol-formaldehyde resin, a fibre based reinforcement including steel fibres and other fillers and additives characterised in that:-
- a) the thermosetting binder makes up 20% to 60% by volume of the composition at least half of the binder being said phenol-formaldehyde resin,
- b) the fibre-based reinforcement is a mixture of staple steel fibres and a non-asbestos mineral reinforcing filler in powder form, and makes up 10% to 35% by volume of the composition, said steel fibres having a length in the range of 1 to 5 mm,
- c) the balance of the composition being friction and wear modifiers and inorganic fillers.
- The steel fibres are fine, e.g. 0.125 mm diam., and with a length in the range 1 to 5 mm. The steel may be mild steel.
- The fibre-based reinforcement is a mixture of materials, one at least of which is staple steel fibre. Other reinforcing materials which may be included in the mixture in powder form include reinforcing fillers such as mica and wollastonite, and milled glass fibre.
- The thermoset binder includes a thermoset resin based on a phenol-formaldehyde resin but may also include a heat and chemical resistant vulcanised rubber, such as a nitrile rubber. Preferably a mixture of such materials is used of which the phenol-formaldehyde resin material constitutes at least half. When a rubber is used it may be incorporated into the friction material in the form of a powder but is preferably incorporated in the form of a solution in a suitable organic solvent and a vulcanising agent such as sulphur is also used.
- The amount of thermoset binder is preferably in the range 20 to 32% by volume of the friction material.
- In the manufacture of the friction materials various other materials may be included as fillers, friction and wear modifiers etc. the proportions of which can be varied to adjust the friction and other properties of the materials.
- In the present case the preferred additives are particulate fillers, more preferably a mixture of such materials and friction and wear modifying materials.
- The particulate fillers will' generally be present in an amount between 10 and 50% by volume and may include such fillers as barytes, whiting, silica etc.
- Examples of friction and wear modifiers are carbon, graphite, antimony trisulphide and molybdenum disulphide and metals, in a finely divided form. Examples of suitable metals are copper and tin. A mixture of such materials may be used, and the total amount of such materials may be up to 40% by volume.
- The friction materials of the present invention are particularly suited to be manufactured by a press-molding technique in which all the ingredients of the material are compounded together, the compounded mix disintegrated and (optionally dried) and then moulded into a component such as a brake pad in a die under pressure. The moulded component is then removed from the die and baked to cure the binder.
- The invention provides friction materials which do not contain asbestos, and yet have comparable properties to asbestos-based friction materials.
- The invention will now be illustrated, by way of example only, by means of the following examples.
- For Example 1 sample disc-brake pads were manufactured according to the formulation given below in Table I. The ingredients were initially compounded together, the nitrile rubber being introduced into the mixture as a powder and the compound was disintegrated and dried.
- The material was then moulded into pads under pressure in a die and the mouldings baked in an oven to cure the binder.
- In each case the sample pads produced were tested and found to have friction properties comparable to asbestos-containing materials.
- These Examples illustrate different proportions of binder and reinforcing materials. Sample disc-brake pads were manufactured according to the formulations given below in Table II. The ingredients were initially compounded together, the nitrile rubber being introduced into the mixture as a 15-20% solids content solution in trichloroethylene, and the phenol-formaldehyde resin as a 70% solids content solution in methylated spirits. The compound was disintegrated and dried and then moulded into pads under pressure in a die and the mouldings baked in an oven to cure the binder.
- In the following table the formulations are expressed in parts by volume.
- In Example 2 the reinforcement was a mixture of Steel Fibres and mica (as in Example 1) but in Example 3 the reinforcement was a mixture of the steel fibres and milled E Glass, the latter being a dust composed of very short lengths of milled glass fibre. In Example 3 the binder included equal amounts of rubber and resin.
- In dynamometer tests of the pads produced the coefficient of friction , of the material of Example 2 varied from 0.26 (cold) to 0.44 (hot) and that of the material of Example 5 varied from 0.30 (cold) to 0.55 (hot).
- The wear of the material of Example 2 was as good as, or better than, most conventional materials of comparable friction level. The wear of the material of Example 3 was reasonable for the level of friction, although higher than that of the materials of Example 2.
- The assembly shear strength of two pads of each material were measured, the values obtained for Example 2 being 16065 and 14755 KN/m2 and those for Example 3 being 16134 and 15375 KN/m2.
- (Assembly Shear Strength = load required to shear material off the backplate area of friction material bonded to the backplate)
Claims (11)
1. An asbestos-free friction material comprising a thermosetting binder containing phenol- formaldehyde resin, a fibre based reinforcement including steel fibres, and other fillers and additives characterised in that:-
a) the thermosetting binder makes up 20% to 60% by volume of the composition, at least half of the binder being said phenol-formaldehyde resin,
b) the fibre based reinforcement is a mixture of staple steel fibres and a non-asbestos mineral reinforcing filler in powder form, and makes up 10% to 35% by volume of the composition, said steel fibres having a length in the range 1 to 5 mm,
c) the balance of the composition being friction and wear modifiers and inorganic fillers.
2. A friction material according to Claim 2 in which the steel is mild steel.
3. A friction material according to Claim 1 or 2 in which the reinforcing filler includes mica.
4. A friction material according to Claim 3 in which said reinforcing filler is mica.
5. A friction material according to Claim 1 or 2 in which the reinforcing filler is wollastonite.
6. A friction material according to any one of the preceding claims which includes as a binder a heat and chemical resistant vulcanized rubber.
7. A friction material according to Claim 6 in which said rubber is a nitrile rubber.
8. A friction material according to any one of the preceding claims which the amount of thermoset binder is in the range 20 to 32% by volume of the material.
9. A friction material according to any one of the preceding claims which includes one or more particulate fillers in an amount between 10 and 50% by volume.
10. A friction material according to Claim 9 in which said particulate filler comprises barytes, whiting or silica.
11. A friction material according to any preceding claim in which said friction and wear modifiers are selected from carbon, graphite, antimony trisulphide and molybdenum disulphide and brass, copper and tin in finely divided form.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB33458/77A GB1604839A (en) | 1977-08-10 | 1977-08-10 | Friction materials |
| GB3345877 | 1977-08-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0000839A1 EP0000839A1 (en) | 1979-02-21 |
| EP0000839B1 true EP0000839B1 (en) | 1981-08-05 |
Family
ID=10353233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP78300258A Expired EP0000839B1 (en) | 1977-08-10 | 1978-08-08 | Improvements in or relating to friction materials |
Country Status (13)
| Country | Link |
|---|---|
| US (2) | US4273699A (en) |
| EP (1) | EP0000839B1 (en) |
| JP (1) | JPS5434349A (en) |
| AU (1) | AU3875478A (en) |
| BR (1) | BR7805104A (en) |
| CS (1) | CS216919B2 (en) |
| DD (1) | DD138076A5 (en) |
| DE (1) | DE2860901D1 (en) |
| GB (1) | GB1604839A (en) |
| IN (1) | IN148770B (en) |
| IT (1) | IT1156900B (en) |
| SU (1) | SU837328A3 (en) |
| ZA (1) | ZA784379B (en) |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4178278A (en) * | 1978-03-01 | 1979-12-11 | Johns-Manville Corporation | Friction material for railroad service |
| US4175070A (en) * | 1978-06-02 | 1979-11-20 | The Bendix Corporation | High carbon friction material |
| AU6662381A (en) * | 1980-02-28 | 1981-09-03 | Goodyear Aerospace Corp. | Elimination of asbestos in organic-type brake linings |
| JPS579330A (en) * | 1980-06-19 | 1982-01-18 | Uchiyama Mfg Corp | Core material of clutch friction plate |
| EP0050377B1 (en) * | 1980-10-16 | 1985-10-02 | Rütgerswerke Aktiengesellschaft | Asbest-free friction material |
| US4373037A (en) * | 1981-05-29 | 1983-02-08 | Engelhard Corporation | Asbestos-free friction material incorporating attapulgite clay |
| NL193609C (en) * | 1981-12-30 | 2000-04-04 | Bekaert Sa Nv | Composite strand for processing as granulate in plastic products and method for manufacturing a plastic mixing granulate. |
| FR2521240B1 (en) * | 1982-02-05 | 1987-03-27 | Valeo | FRICTION LINING, PARTICULARLY FOR BRAKES, CLUTCHES AND OTHER APPLICATIONS |
| US4474905A (en) * | 1982-09-30 | 1984-10-02 | General Technology Applications, Inc. | Freeze blending of reactive liquids and solids |
| BE900821A (en) * | 1983-10-14 | 1985-02-01 | Rogers Corp | PHENOLIC COMPOSITION STABLE TO HEAT. |
| US4659758A (en) * | 1983-10-14 | 1987-04-21 | Rogers Corporation | Heat stable phenolic composition |
| GB8405645D0 (en) * | 1984-03-03 | 1984-04-04 | Ferodo Ltd | Friction materials |
| US4775705A (en) * | 1984-10-20 | 1988-10-04 | T&N Plc | Friction materials and their manufacture |
| GB8426601D0 (en) * | 1984-10-20 | 1984-11-28 | Nuturn Corp | Friction materials |
| JPS61115987A (en) * | 1984-11-12 | 1986-06-03 | Sumitomo Electric Ind Ltd | Friction material using steel fiber |
| US4722950A (en) * | 1986-07-07 | 1988-02-02 | Allied Corporation | Friction material |
| GB8806600D0 (en) * | 1988-03-19 | 1988-04-20 | Lucas Ind Plc | Friction materials |
| JPH02146327A (en) * | 1988-11-29 | 1990-06-05 | Akebono Brake Res & Dev Center Ltd | Friction material |
| CA2024478C (en) * | 1989-09-01 | 1997-05-20 | Mitsuhiko Nakagawa | Friction material and method of manufacturing such material |
| US5268398A (en) * | 1989-09-01 | 1993-12-07 | Sumitomo Electric Industries, Ltd. | Friction material and method of manufacturing such material |
| GB9020070D0 (en) * | 1990-09-14 | 1990-10-24 | Ferodo Ltd | Improvements in or relating to brake pads |
| JP2813060B2 (en) * | 1990-11-28 | 1998-10-22 | 株式会社曙ブレーキ中央技術研究所 | Non-asbestos friction material |
| JPH055091A (en) * | 1991-02-08 | 1993-01-14 | Akebono Brake Res & Dev Center Ltd | Frictional material |
| AT411765B (en) * | 1991-03-20 | 2004-05-25 | Hoerbiger & Co | FRICTION MATERIAL PRODUCED BY SINTER |
| DE4119515C1 (en) * | 1991-06-13 | 1992-12-10 | Textar Gmbh, 5090 Leverkusen, De | |
| GB9123009D0 (en) * | 1991-10-30 | 1991-12-18 | Ferodo Ltd | Improvements in or relating to brake pads |
| GB2268502B (en) * | 1992-07-03 | 1995-11-01 | Ferodo Ltd | Improved friction materials |
| JP3421364B2 (en) * | 1992-07-14 | 2003-06-30 | 曙ブレーキ工業株式会社 | Friction material |
| US5622785A (en) * | 1994-01-31 | 1997-04-22 | Performance Friction Corporation | Coating for a brake pad, a method of reducing brake pad noise, and a brake pad |
| JP2002226834A (en) * | 2001-01-30 | 2002-08-14 | Nisshinbo Ind Inc | Nonasbestos friction material |
| GB2517951A (en) | 2013-09-05 | 2015-03-11 | Imp Innovations Ltd | A substrate and a method of manufacturing a substrate |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3007890A (en) * | 1959-05-07 | 1961-11-07 | Chrysler Corp | Friction elements and method of making the same |
| FR1363324A (en) | 1963-04-30 | 1964-06-12 | Brake linings comprising an improved phenolic resin and method of manufacture thereof | |
| US3355272A (en) * | 1964-11-24 | 1967-11-28 | Union Carbide Corp | Abrasive compositions and structures thereof comprising a thermosetting resin and a thermoplastic polyarylene polyether |
| FR1575746A (en) | 1968-04-26 | 1969-07-25 | ||
| DE1780271A1 (en) * | 1968-08-23 | 1971-12-30 | Jurid Werke Gmbh | Brake pad for vehicle disc brakes |
| CA928227A (en) | 1969-02-14 | 1973-06-12 | R. Johnson Howard | Friction lining composition |
| US4051097A (en) * | 1972-01-31 | 1977-09-27 | The Bendix Corporation | Carbon metallic friction composition |
| CA998792A (en) | 1972-01-31 | 1976-10-19 | Francis W. Aldrich | Carbon and metal or metal oxide friction compositions |
| US3956545A (en) * | 1972-05-10 | 1976-05-11 | Johns-Manville Corporation | Glass fiber friction element |
| GB1445975A (en) | 1972-08-30 | 1976-08-11 | Ici Ltd | Friction material |
| US3835118A (en) * | 1973-05-14 | 1974-09-10 | Bendix Corp | Sponge iron friction material |
| US3967037A (en) * | 1974-04-12 | 1976-06-29 | Owens-Corning Fiberglas Corporation | Friction material for brake linings and the like |
| DE2535526B2 (en) | 1975-08-08 | 1978-03-09 | Jurid Werke Gmbh, 2056 Glinde | Friction lining, in particular for heavy-duty car and truck clutch and / or drum and disc brakes |
| DE2535527B2 (en) | 1975-08-08 | 1978-03-09 | Jurid Werke Gmbh, 2056 Glinde | Friction lining, in particular for drum brakes in commercial vehicles |
| DE2539847B2 (en) | 1975-09-08 | 1977-12-22 | Jurid Werke Gmbh, 2056 Glinde | FRICTION LINING, IN PARTICULAR BRAKE LINING FOR RAIL VEHICLES |
| US4125496A (en) * | 1977-01-28 | 1978-11-14 | Raybestos-Manhattan, Inc. | Friction material |
| US4119591A (en) * | 1977-07-05 | 1978-10-10 | The Bendix Corporation | Friction material reinforced with steel and cellulose fibers |
-
1977
- 1977-08-10 GB GB33458/77A patent/GB1604839A/en not_active Expired
-
1978
- 1978-07-31 US US05/929,535 patent/US4273699A/en not_active Expired - Lifetime
- 1978-08-01 IN IN566/DEL/78A patent/IN148770B/en unknown
- 1978-08-02 ZA ZA00784379A patent/ZA784379B/en unknown
- 1978-08-08 EP EP78300258A patent/EP0000839B1/en not_active Expired
- 1978-08-08 DE DE7878300258T patent/DE2860901D1/en not_active Expired
- 1978-08-09 AU AU38754/78A patent/AU3875478A/en active Pending
- 1978-08-09 BR BR7805104A patent/BR7805104A/en unknown
- 1978-08-09 IT IT50665/78A patent/IT1156900B/en active
- 1978-08-10 CS CS785243A patent/CS216919B2/en unknown
- 1978-08-10 SU SU782649254A patent/SU837328A3/en active
- 1978-08-10 DD DD78207214A patent/DD138076A5/en unknown
- 1978-08-10 JP JP9774778A patent/JPS5434349A/en active Pending
-
1980
- 1980-05-14 US US06/149,697 patent/US4310452A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| IT7850665A0 (en) | 1978-08-09 |
| IN148770B (en) | 1981-06-06 |
| JPS5434349A (en) | 1979-03-13 |
| DE2860901D1 (en) | 1981-11-05 |
| BR7805104A (en) | 1979-04-24 |
| CS216919B2 (en) | 1982-12-31 |
| SU837328A3 (en) | 1981-06-07 |
| GB1604839A (en) | 1981-12-16 |
| US4273699A (en) | 1981-06-16 |
| ZA784379B (en) | 1979-07-25 |
| AU3875478A (en) | 1980-02-14 |
| EP0000839A1 (en) | 1979-02-21 |
| US4310452A (en) | 1982-01-12 |
| DD138076A5 (en) | 1979-10-10 |
| IT1156900B (en) | 1987-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0000839B1 (en) | Improvements in or relating to friction materials | |
| US4226759A (en) | Friction materials | |
| EP0000840B1 (en) | Friction materials and their uses | |
| US6228815B1 (en) | Solid lubricants containing bismuth sulfide for use in friction lining | |
| EP0120200B1 (en) | Fluoroelastomer-based friction material having improved frictional properties | |
| WO1988000930A1 (en) | Cementitious composite friction compositions | |
| IE48486B1 (en) | An improved heat and wear resistant friction material | |
| GB2050394A (en) | Friction material | |
| KR0162242B1 (en) | Non-asbestos friction material | |
| US4226758A (en) | Friction material | |
| EP1227262A1 (en) | Non-asbestos friction material | |
| US4477605A (en) | Asbestos-free friction materials | |
| GB1604827A (en) | Friction materials | |
| US4313869A (en) | Composition friction element for a railroad brake shoe | |
| EP1388684A1 (en) | Non-asbestos friction material | |
| JPH0623387B2 (en) | Asbestos-free friction material for braking | |
| US20080121474A1 (en) | Friction Materials Comprising Coal Combustion And Coal Gasification Byproducts | |
| JPH0693110A (en) | Asbestos-free friction material | |
| EP0523191B1 (en) | Improvements in or relating to brake pads | |
| JPS62258235A (en) | Non-asbestine friction material | |
| JP2858968B2 (en) | Non-asbestos friction material | |
| KR910004980B1 (en) | Brake lining | |
| JPS5974179A (en) | Friction material | |
| JPH05247444A (en) | Nonasbestos friction material | |
| JPH04314779A (en) | Nonasbestine friction material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): BE CH DE FR GB LU NL SE |
|
| 17P | Request for examination filed | ||
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Designated state(s): BE CH DE FR GB LU NL SE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19810831 |
|
| REF | Corresponds to: |
Ref document number: 2860901 Country of ref document: DE Date of ref document: 19811105 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19820331 Year of fee payment: 4 |
|
| PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19820630 Year of fee payment: 5 |
|
| 26 | Opposition filed |
Opponent name: JURID WERKE GMBH Effective date: 19820428 |
|
| PLAB | Opposition data, opponent's data or that of the opponent's representative modified |
Free format text: ORIGINAL CODE: 0009299OPPO |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19820802 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19820831 Year of fee payment: 5 |
|
| R26 | Opposition filed (corrected) |
Opponent name: JURID WERKE GMBH Effective date: 19820428 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19820930 Year of fee payment: 5 Ref country code: BE Payment date: 19820930 Year of fee payment: 5 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19821209 |
|
| RDAG | Patent revoked |
Free format text: ORIGINAL CODE: 0009271 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: PATENT REVOKED |
|
| 27W | Patent revoked |
Effective date: 19830428 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| EUG | Se: european patent has lapsed |
Ref document number: 78300258.7 Effective date: 19850610 |