EP0187597B1 - Zusammensetzung und Verfahren zum Beschichten von Metalloberflächen mit einer Konversionsschicht auf der Basis von Zinkphosphat - Google Patents
Zusammensetzung und Verfahren zum Beschichten von Metalloberflächen mit einer Konversionsschicht auf der Basis von Zinkphosphat Download PDFInfo
- Publication number
- EP0187597B1 EP0187597B1 EP85402589A EP85402589A EP0187597B1 EP 0187597 B1 EP0187597 B1 EP 0187597B1 EP 85402589 A EP85402589 A EP 85402589A EP 85402589 A EP85402589 A EP 85402589A EP 0187597 B1 EP0187597 B1 EP 0187597B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ion
- zinc
- bath
- fact
- phosphatization
- 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
- 239000000203 mixture Substances 0.000 title claims description 14
- 229910052751 metal Inorganic materials 0.000 title claims description 8
- 239000002184 metal Substances 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 7
- 238000000576 coating method Methods 0.000 title description 2
- 239000011248 coating agent Substances 0.000 title 1
- 238000007739 conversion coating Methods 0.000 title 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 title 1
- 229910000165 zinc phosphate Inorganic materials 0.000 title 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000011701 zinc Substances 0.000 claims abstract description 25
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 25
- -1 fluorophosphate ion Chemical class 0.000 claims abstract description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 17
- 239000012141 concentrate Substances 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 10
- 229910001453 nickel ion Inorganic materials 0.000 claims description 9
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229940085991 phosphate ion Drugs 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 7
- 238000002161 passivation Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 238000005238 degreasing Methods 0.000 claims description 4
- 239000008235 industrial water Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 229910020425 K2PO3F Inorganic materials 0.000 claims description 2
- 238000010790 dilution Methods 0.000 claims description 2
- 239000012895 dilution Substances 0.000 claims description 2
- 229940005638 monofluorophosphate ion Drugs 0.000 claims description 2
- 229910001430 chromium ion Inorganic materials 0.000 claims 2
- 239000004411 aluminium Substances 0.000 claims 1
- 238000007598 dipping method Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 22
- 239000000126 substance Substances 0.000 abstract description 14
- 239000002253 acid Substances 0.000 abstract description 5
- 150000003863 ammonium salts Chemical class 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 abstract description 2
- 150000003751 zinc Chemical class 0.000 abstract description 2
- 239000003513 alkali Substances 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 description 10
- 238000011282 treatment Methods 0.000 description 10
- 229910019142 PO4 Inorganic materials 0.000 description 8
- 239000007921 spray Substances 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 7
- 239000010452 phosphate Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000011575 calcium Substances 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- 229940074371 monofluorophosphate Drugs 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical class [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 150000002823 nitrates Chemical class 0.000 description 4
- 150000002826 nitrites Chemical class 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 125000001153 fluoro group Chemical group F* 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 235000011007 phosphoric acid Nutrition 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910001463 metal phosphate Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 125000004437 phosphorous atom Chemical group 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- JUWGUJSXVOBPHP-UHFFFAOYSA-B titanium(4+);tetraphosphate Chemical compound [Ti+4].[Ti+4].[Ti+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O JUWGUJSXVOBPHP-UHFFFAOYSA-B 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- SSFRJJARVXKYME-UHFFFAOYSA-L zinc;fluoro-dioxido-oxo-$l^{5}-phosphane Chemical compound [Zn+2].[O-]P([O-])(F)=O SSFRJJARVXKYME-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
- C23C22/36—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
- C23C22/36—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates
- C23C22/362—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates containing also zinc cations
Definitions
- the subject of the invention is a bath and a process for the chemical conversion to zinc of metallic substrates, in particular those based on iron, zinc, aluminum and alloys of these metals.
- These treatments can be carried out by spraying the above-mentioned solutions onto the objects to be treated or by immersing them in baths formed by these solutions, generally at temperatures above 30 ° C.
- the Applicant Company has worked to improve the existing chemical conversion baths and had the merit of finding, after extensive research, that the implementation in a zinc phosphating bath of an effective amount of at least one compound comprising at least one fluorine atom chemically bonded to an atom phosphorus, preferably an effective amount of fluorophosphate ion, allowed to achieve the desired goal.
- the fluorophosphate ion can be introduced into the bath using the corresponding acid or one of its alkaline, alkaline-earth or ammonium salts or its zinc salt.
- the above-mentioned bath preferably comprises from 2 to 7 gA of zinc ion and from 2 to 7 g / I of fluorophosphate ion.
- the invention also relates to a kit, as defined in claim II, for the preparation of the bath of the invention.
- the invention also relates to a certain number of other arrangements which will be discussed below.
- a conventional chemical conversion bath to zinc is made to contain an amount of 1 to 10 g / l, preferably 2 to 7 g / l , of zinc ion and from 1 to 10 g / l, preferably from 2 to 7 g / I, of fluorophosphate ion.
- the zinc ion can be brought in any suitable way and in particular in the form of its salts such as nitrate or phosphate or of its oxide.
- the phosphate ion is present in an amount between 3 and 20 g / l, preferably between 3 and 15 g / l, and the nickel ion in an amount between 0.5 and 2 g / l, preferably 0 , 5 to 1 g / I.
- the accelerator can be present in an amount between 40 and 150 mg / l.
- Conventional ions such as Fe, Ca, Mn can be present in an amount between 0 and 5 g / I.
- test pieces are treated either in a chemical dip bath conventionally used in industry, or in various baths according to the invention.
- test pieces are immersed for 150 seconds in one of the above-mentioned chemical conversion baths.
- Bath A This is a comparative example using a conventional bath, hereinafter designated by Bath A and the composition of which is as follows:
- Bain B a bath in accordance with the invention, hereinafter called Bain B and the composition of which is as follows:
- Bain D a bath according to the invention, hereinafter called Bain D and the composition of which is as follows:
- Bath E This is an example using a bath in accordance with the invention, hereinafter called Bath E and the composition of which is as follows:
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Chemically Coating (AREA)
Claims (11)
dadurch gekennzeichnet, daß es die Anwendung eines Phosphatierungsbades nach einem der Ansprüche 1 bis 7 auf dem zu behandelnden Substrat durch Aufsprühen oder durch Eintauchen des Substrates umfaßt, wobei die Badtemperatur 30 bis 70 °C beträgt und der Kontakt zwischen Bad und Substrat 5 bis 200 Sekunden lang aufrechterhalten wird.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT85402589T ATE46544T1 (de) | 1984-12-21 | 1985-12-20 | Zusammensetzung und verfahren zum beschichten von metalloberflaechen mit einer konversionsschicht auf der basis von zinkphosphat. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8419709 | 1984-12-21 | ||
FR8419709A FR2575188B1 (fr) | 1984-12-21 | 1984-12-21 | Bain et procede de conversion chimique de substrats metalliques |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0187597A1 EP0187597A1 (de) | 1986-07-16 |
EP0187597B1 true EP0187597B1 (de) | 1989-09-20 |
Family
ID=9310914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85402589A Expired EP0187597B1 (de) | 1984-12-21 | 1985-12-20 | Zusammensetzung und Verfahren zum Beschichten von Metalloberflächen mit einer Konversionsschicht auf der Basis von Zinkphosphat |
Country Status (7)
Country | Link |
---|---|
US (1) | US4668307A (de) |
EP (1) | EP0187597B1 (de) |
JP (1) | JPS61183477A (de) |
AT (1) | ATE46544T1 (de) |
CA (1) | CA1270730A (de) |
DE (1) | DE3573140D1 (de) |
FR (1) | FR2575188B1 (de) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1177292A (fr) * | 1957-06-14 | 1959-04-22 | Parker Ste Continentale | Procédé de revêtement du titane et de ses alliages |
FR1477179A (fr) * | 1965-04-26 | 1967-04-14 | Pennsalt Chemicals Corp | Enduits de métaux pour en augmenter la résistance à la corrosion et l'adhérence de la peinture |
FR1538275A (fr) * | 1967-10-02 | 1968-08-30 | Parker Ste Continentale | Procédé de revêtement de surfaces métalliques et composition pour sa mise en oeuvre |
FR2352895A1 (fr) * | 1976-04-21 | 1977-12-23 | Diversey France | Nouveau procede de traitement de surfaces metalliques au moyen de composes oxyfluores du phosphore 5 |
US4153478A (en) * | 1976-04-21 | 1979-05-08 | The Diversey Corporation | Process for treatment of metallic surfaces by means of fluorophosphate salts |
US4391652A (en) * | 1982-01-29 | 1983-07-05 | Chemical Systems, Inc. | Surface treatment for aluminum and aluminum alloys |
-
1984
- 1984-12-21 FR FR8419709A patent/FR2575188B1/fr not_active Expired - Fee Related
-
1985
- 1985-12-18 CA CA000497994A patent/CA1270730A/en not_active Expired - Fee Related
- 1985-12-20 DE DE8585402589T patent/DE3573140D1/de not_active Expired
- 1985-12-20 JP JP60285910A patent/JPS61183477A/ja active Granted
- 1985-12-20 AT AT85402589T patent/ATE46544T1/de not_active IP Right Cessation
- 1985-12-20 US US06/811,841 patent/US4668307A/en not_active Expired - Fee Related
- 1985-12-20 EP EP85402589A patent/EP0187597B1/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPH0129871B2 (de) | 1989-06-14 |
EP0187597A1 (de) | 1986-07-16 |
ATE46544T1 (de) | 1989-10-15 |
DE3573140D1 (en) | 1989-10-26 |
FR2575188B1 (fr) | 1993-02-12 |
US4668307A (en) | 1987-05-26 |
JPS61183477A (ja) | 1986-08-16 |
FR2575188A1 (fr) | 1986-06-27 |
CA1270730A (en) | 1990-06-26 |
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