EP0837956B1 - Verfahren zum schwermetallfreien verdichten anodisierter metalle mit lithium- und fluorid-haltigen lösungen - Google Patents
Verfahren zum schwermetallfreien verdichten anodisierter metalle mit lithium- und fluorid-haltigen lösungen Download PDFInfo
- Publication number
- EP0837956B1 EP0837956B1 EP96924816A EP96924816A EP0837956B1 EP 0837956 B1 EP0837956 B1 EP 0837956B1 EP 96924816 A EP96924816 A EP 96924816A EP 96924816 A EP96924816 A EP 96924816A EP 0837956 B1 EP0837956 B1 EP 0837956B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- solution used
- acid
- layer thickness
- lithium
- 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 - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
Definitions
- the invention is in the field of producing anti-corrosion and / or decorative coatings on metals by anodic Oxidation. It relates to a new process for compacting the electrochemically produced porous anodizing layers for further Improve their properties.
- Electrolytes The electrochemical anodic oxidation of metals in suitable Electrolytes is a widely used process for the formation of corrosion-protective and / or decorative coatings for this suitable metals.
- These processes are, for example, in Ullmann's Encyclopedia of Industrial Chemistry, 5th Edition, Vol. 9 (1987), pp. 174 - 176 briefly characterized. Accordingly, are titanium, magnesium and aluminum and their alloys can be anodized, wherein the anodization of aluminum and its alloys technically is of the greatest importance.
- the electrolytically generated Anodizing layers protect the aluminum surfaces from the influences the weather and other corrosive media. Further anodizing layers are applied to create a harder surface and thus increased wear resistance of the aluminum to reach.
- Anodizing aluminum takes place in an acidic electrolyte, with sulfuric acid on is most common.
- Other suitable electrolytes are phosphoric acid, Oxalic acid and chromic acid.
- the characteristics of the Anodizing layers can be selected by the choice of the electrolyte, its temperature as well as the current density and the anodizing time in wide limits vary. Anodization is usually carried out with direct current or with an alternating current superimposed on direct current.
- the fresh anodizing layers can be dipped in solutions a suitable dye or by an AC treatment in a metal salt containing, preferably in a tin containing Electrolytes can be colored afterwards.
- Coloring can be done through colored anodizing layers receive so-called color anodization processes, for which one, for example the anodization in solutions of organic acids, such as especially sulfophthalic acid or sulfanilic acid, if appropriate each mixed with sulfuric acid.
- nickel salts in particular Fluorides, some of which are used in practice (EP 171 799), nitrosylpentacyanoferrate, complex fluorides of titanium and Zirconium and chromates or chromic acid, optionally in combination with other additives.
- the oxide layer was made hydrophobic by means of compression long chain carboxylic acids or waxes recommended as well as treatment with acrylamides that are to be polymerized in the pore space. Further information can be found in the above-mentioned literature from S. Wernick et al. be removed. These suggestions failed with the exception of compression with nickel compounds in practice don't enforce.
- the contact of the treatment solutions with the Anodized metals can be sprayed onto the solutions Metal surfaces or preferably by immersing the metal parts done in the solutions.
- Anodizing layer thickness of about 20 microns are the required treatment times for step a) in the range of 3 to 30 minutes, in Sub-step b) in the range of 5 to 30 minutes.
- An intermediate rinse is preferably carried out between steps a) and b) with water, also by spraying or can be done by immersion.
- Urban or industrial water however, demineralized water is preferably used.
- the duration of this rinsing is preferably in the range between 2 and 30 seconds.
- the lithium ions required for sub-step a) can, for example be introduced as lithium hydroxide, the pH the treatment solution with an acid on the range according to the invention between about 5.0 and about 6.5 must become.
- Suitable acids include, for example Nitric acid, sulfuric acid and water-soluble Carboxylic acids such as formic acid or acetic acid, Hydroxycarboxylic acids such as lactic acid or amino acids such as glycine.
- lithium halides in particular lithium fluoride, Lithium chlorate, lithium perchlorate, lithium nitrate, lithium sulfate as well as lithium salts of carboxylic acids with no more than 6 carbon atoms, the carboxylic acids being monobasic and polybasic and substituents such as hydroxyl or amino groups can wear.
- lithium carboxylates are Lithium formate, lithium acetate, lithium lactate and lithium glycinate. Lithium acetate is particularly preferred.
- you set the Lithium compounds in an amount such that the lithium ion concentration is in the range of about 0.25 to about 1.5 g / l.
- the fluoride ions provided in sub-step a) can be introduced in free or in complex-bound form.
- the corresponding acids such as, for example, hydrofluoric acid
- the pH of the bath having to be raised to the range according to the invention by adding alkalis.
- suitable alkalis are lithium hydroxide, sodium hydroxide, potassium hydroxide or ammonia.
- Suitable salts which provide free fluoride ions are, for example, lithium fluoride, sodium fluoride, potassium fluoride or their acidic variants, for example KHF 2 , the pH of the treatment solution possibly having to be adjusted by adding alkalis.
- Sodium fluoride is particularly preferred as the source of free fluoride ions.
- the fluoride ions can be used in complex-bound form, for example in the form of tetrafluoroborate, hexafluorosilicate, hexafluorotitanate or hexofluorozirconate, which are preferably used as ammonium or alkali metal salts, in particular sodium salts.
- Hexafluorosilicate which can be used, for example, as a sodium salt, is particularly preferred as the complex fluoride.
- the calculated concentration of the free or complex-bound fluoride ions is preferably in the range from about 0.25 to about 2 g / l.
- the time for sub-step a) is less than 0.15 Minutes per micrometer anodizing layer thickness occurs compression effect according to the invention not or only very limited on, time periods above 1.5 minutes per micrometer Anodizing layer thickness does no harm, but does not bring any further Advantage and are therefore economically disadvantageous.
- the treatment time in sub-step a) is in the range from 0.25 to 0.75 minutes per micron of anodizing layer thickness.
- the pH is preferably in the range of about 5.5 to about 6.0.
- the solution in sub-step a) additionally contains one or more of the following components: 1. 10 to 2000 ppm Alkali or ammonium salts of saturated or unsaturated monocarboxylic acids with 8 to 22 carbon atoms, 2. 0.01 to 1000 ppm anionic, cationic or nonionic surfactants, preferably nonionic surfactants and in particular ethoxylation products of fatty amines, for example cocosamine, 3. 10 to 2000 ppm Molybdates, tungstates or vanadates in monomeric or oligomeric form, individually or as a mixture with one another, 4.
- 1. 10 to 2000 ppm Alkali or ammonium salts of saturated or unsaturated monocarboxylic acids with 8 to 22 carbon atoms 2. 0.01 to 1000 ppm anionic, cationic or nonionic surfactants, preferably nonionic surfactants and in particular ethoxylation products of fatty amines, for example cocosamine, 3. 10 to 2000 ppm Molybdates,
- ppm 1 to 1000 ppm, preferably 10 to 100 ppm Homo- or copolymers of acrylic acid and / or methacrylic acid and / or maleic acid, which can additionally carry phosphonic acid groups and have an average molar mass in the range from 200 to 2000, preferably 400 to 800.
- the treatment solution in sub-step a) has one Temperature in the range of about 15 to about 35 ° C. In doing so reliably achieved good results when the temperature of the treatment solution is set in the range from 18 to 25 ° C.
- This treatment step a) according to the invention can be regarded as a pre-compression, since although this improves the layer properties compared to an undensified anodizing layer, the technical requirements for the properties of the anodizing layers discussed below are generally not yet achieved. It is therefore preferred to have this precompression - without or preferably with an intermediate rinse with water, in particular with demineralized water - as sub-step b) a final compression by immersion in a conventional hot compression bath at a temperature between 80 and 100 ° C. Hot compression baths such as are currently used in technology are suitable for this.
- the commercial hot sealing bath P3-almecoseal-SL R (Henkel KGaA, Düsseldorf) is suitable for this purpose, which is operated at a temperature of 96 ° C. or above and a pH value of 5.8 to 8.2 (speedseal).
- the required final compression time in such a hot compression bath is between 0.25 and 1.5, preferably between 0.75 and 1.25 minutes per micrometer anodizing layer thickness, wherein times above 1 minute per micrometer anodizing layer thickness are generally not necessary.
- the treatment solution for the sub-step b) can be carried out in the temperature range between 90 and 98 ° C. and in particular at about 96 ° C., as was customary for conventional hot compression.
- the method according to the invention is preferred as pre-compression used together with conventional hot compression.
- This requires compared to the current state of the art an additional treatment step, but has the advantage that the total treatment time is reduced despite the additional level, so that productivity per unit of time is increased. Farther is reduced by the shortened batch times and if necessary reduced temperatures in the downstream hot compression bath the amount of energy required per batch, the main one caused by evaporation losses during the treatment period becomes.
- the method according to the invention is therefore ongoing Operation more economical than conventional hot compression, where the treatment time of a batch in the hot compression bath is about an hour.
- shortened according to the invention Process the entire compaction time after anodizing to about half.
- the nickel-containing cold compression process is characterized by the invention Processes characterized by better environmental compatibility.
- Processes can produce densified anodizing layers in their layer properties not the conventionally produced ones inferior.
- Technical test parameters for the layer quality are especially the removal of acid in chromic acid, the apparent conductance as well as the color drop test of importance. These quality indicators the layers are tested according to standard test methods, which are given in the example part.
- the compression method according to the invention is preferably used for anodized aluminum or anodized aluminum alloys are used. However, it can also be applied to the anodizing layers anodizable metals such as titanium and magnesium or use their alloys. It is for both undyed anodizing layers can be used as well for those that using conventional processes such as integral staining, adsorptive staining using organic dyes, reactive coloring with formation of inorganic Color pigments, using an electrochemical coloring of metal salts, in particular tin salts, or interference coloring were colored. With adsorptively colored anodizing layers
- the method according to the invention has the further advantage that due to the shortened compression time and the low Temperature in the first compression step that with conventional Hot compression possible bleeding of the dye is reduced.
- Aluminum sheets of the type Al 99.5 were conventionally anodized (direct current / sulfuric acid, one hour, layer thickness 20 ⁇ m) and, if necessary, colored electrochemically or with organic immersion colors. The sheets were then immersed for 10 minutes at 20 ° C. in the compression solutions or comparison solutions a) according to the invention as shown in the table. Unless otherwise stated, the pH was adjusted with ammonia or acetic acid. This was followed by a 2 to 10 second rinse with deionized water.
- the apparent conductance Y 20 was determined in accordance with the German standard DIN 50949 using an Anotest YD 8.1 measuring device from Fischer.
- the measuring system consists of two electrodes, one of which is conductively connected to the base material of the sample.
- the second electrode is immersed in an electrolyte cell that can be placed on the layer to be examined.
- This cell is designed as a rubber ring with an inner diameter of 13 mm and a thickness of approximately 5 mm, the ring surface of which is self-adhesive.
- the measuring area is 1.33 cm 2 .
- a potassium sulfate solution (35 g / l) in deionized water is used as the electrolyte.
- the apparent conductance readable on the measuring device is converted according to the specifications of DIN 50949 to a measuring temperature of 25 ° C and to a layer thickness of 20 ⁇ m.
- the values obtained, which should preferably be in the range between approximately 10 and approximately 20 ⁇ S, are entered in the table.
- the open-pored and therefore poorly compressed Layers the residual reflection after staining with Dye measured in accordance with the German standard DIN 50946.
- the measuring surface was measured using a self-adhesive measuring cell of the Anotest device described above.
- the Test area is covered with an acid solution (25 ml / l sulfuric acid, 10 g / l KF). After exactly one minute, the acid solution is washed off and dried the test area. Then the test area wetted with dye solution (5 g / l Sanodal blue), which one For a minute. After rinsing under running water the measuring cell is removed. The stained test area is marked by Rub loose using a mild powder cleaner adhering dye freed.
- a relative reflection measurement is made by the measuring head a light reflection measuring device (Micro Color from Dr. Lange) once on an undyed part of the surface and on the second is placed on the stained measuring surface.
- the residual reflection in % is obtained by taking the quotient from the measured value of the colored Area divided by the measured value of the uncolored area multiplied by a hundred. Residual reflection values between 95 and 100 % are evidence of good compaction quality, while values below 95 % are considered unacceptable. The compression quality is all the more the higher the values of the residual reflection are.
- the found Values are entered in the table.
- the acid removal was measured based on ISO 3210.
- the test plate is weighed to the nearest 0.1 mg and then immersed for 15 minutes at 38 ° C in an acid solution containing 35 ml of 85% phosphoric acid and 20 g of chromium (VI) oxide per liter.
- the sample is rinsed with deionized water and dried in a drying cabinet at 60 ° C. for 15 minutes.
- the sample is then weighed again.
- the weight difference between the first and the second measurement is calculated and divided by the size of the surface in dm 2 . Weight loss is expressed in mg / dm 2 and should not exceed 30 mg / dm 2 .
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Treatment Of Metals (AREA)
- Chemically Coating (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
1. 10 bis 2000 ppm | Alkali- oder Ammoniumsalze von gesättigten oder ungesättigten Monocarbonsäuren mit 8 bis 22 C-Atomen, |
2. 0,01 bis 1000 ppm | anionische, kationische oder nichtionische Tenside, vorzugsweise nichtionische Tenside und insbesondere Ethoxylierungsprodukte von Fettaminen, beispielsweise von Cocosamin, |
3. 10 bis 2000 ppm | Molybdate, Wolframate oder Vanadate in monomerer oder oligomerer Form, einzeln oder im Gemisch miteinander, |
4. 1 bis 1000 ppm, vorzugsweise 10 bis 100 ppm | Homo- oder Copolymere von Acrylsäure und/oder Methacrylsäure und/oder Maleinsäure, die zusätzlich Phosphonsäuregruppen tragen können und eine mittlere Molmasse im Bereich von 200 bis 2000, vorzugsweise 400 bis 800 aufweisen. |
Claims (9)
- Verfahren zum schwermetallfreien Verdichten anodisierter Metalle, dadurch gekennzeichnet, daß man das anodisierte Metalla) in einem ersten Schritt für eine Zeitdauer von 0,15 bis 1,5 Minuten pro Mikrometer Anodisierschichtdicke mit einer wäßrigen Lösung mit einer Temperatur im Bereich von 15 bis 35 °C in Berührung bringt, die einen pH-Wert im Bereich von 5,0 bis 6,5 aufweist und 0,1 bis 3 g/l Lithiumionen sowie 0,1 bis 5 g/l Fluoridionen enthält, undb) in einem zweiten Schritt mit Wasser oder einer wäßrigen Lösung von Sealingbelag-verhindernden Substanzen mit einem pH-Wert im Bereich von 5,5 bis 8,5 und einer Temperatur im Bereich von 80 bis 100 °C für eine Zeitdauer von 0,25 bis 1,5 Minuten pro Mikrometer Anodisierschichtdicke in Berührung bringt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das anodisierte Metall zwischen den Schritten a) und b) mit Wasser gespült wird.
- Verfahren nach einem oder beiden der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die wäßrige Lösung im Teilschritt a) 0,25 bis 1,5 g/l Lithiumionen enthält.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die wäßrige Lösung im Teilschritt a) 0,25 bis 2 g/l Fluoridionen enthält.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Behandlungszeit im Teilschritt a) im Bereich von 0,25 bis 0,75 Minuten pro Mikrometer Anodisierschichtdicke liegt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Lösung im Teilschritt a) zusätzlich eine oder mehrere der folgenden Komponenten enthält:10 bis 2000 ppm Alkali- oder Ammoniumsalze von gesättigten oder ungesättigten Carbonsäuren mit 8 bis 22 C-Atomen,0,01 bis 1000 ppm anionische, kationische oder nichtionische Tenside,10 bis 2000 ppm Molybdate, Wolframate, Vanadate oder Gemische hiervon,1 bis 1000 ppm Homo- oder Copolymere von Acrylsäure, Methacrylsäure und/oder Maleinsäure, die zusätzlich Phosphonsäuregruppen tragen können und eine mittlere Molmasse im Bereich von 200 bis 2000 aufweisen.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Wasser oder die Behandlungslösung im Teilschritt b) eine Temperatur im Bereich von 90 bis 98 °C aufweist.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß man das Wasser oder die Behandlungslösung im Teilschritt b) für eine Zeitdauer im Bereich von 0,75 bis 1,25 Minuten pro Mikrometer Anodisierschichtdicke einwirken läßt.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Wasser oder die Behandlungslösung im Teilschritt b) cyclische Polycarbonsäuren mit 4 bis 6 Carboxylgruppen und/oder Phosphonsäuren in Konzentrationen zwischen 0,0005 und 0,2 g/l enthält.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19524828 | 1995-07-07 | ||
DE19524828A DE19524828A1 (de) | 1995-07-07 | 1995-07-07 | Verfahren zum schwermetallfreien Verdichten anodisierter Metalle mit Lithium- und Fluorid-haltigen Lösungen |
PCT/EP1996/002848 WO1997003232A1 (de) | 1995-07-07 | 1996-06-29 | Verfahren zum schwermetallfreien verdichten anodisierter metalle mit lithium- und fluorid-haltigen lösungen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0837956A1 EP0837956A1 (de) | 1998-04-29 |
EP0837956B1 true EP0837956B1 (de) | 1999-06-02 |
Family
ID=7766293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96924816A Expired - Lifetime EP0837956B1 (de) | 1995-07-07 | 1996-06-29 | Verfahren zum schwermetallfreien verdichten anodisierter metalle mit lithium- und fluorid-haltigen lösungen |
Country Status (10)
Country | Link |
---|---|
US (1) | US5891269A (de) |
EP (1) | EP0837956B1 (de) |
JP (1) | JPH11509579A (de) |
KR (1) | KR19990028786A (de) |
AR (1) | AR002693A1 (de) |
AU (1) | AU692113B2 (de) |
CA (1) | CA2226418A1 (de) |
DE (2) | DE19524828A1 (de) |
ES (1) | ES2135244T3 (de) |
WO (1) | WO1997003232A1 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3707229B2 (ja) * | 1997-06-27 | 2005-10-19 | コニカミノルタビジネステクノロジーズ株式会社 | 電子写真感光体およびこれを用いた電子写真画像形成装置 |
DE10339165A1 (de) * | 2003-08-26 | 2005-03-24 | Henkel Kgaa | Farbige Konversionsschichten auf Metalloberflächen |
JP4527509B2 (ja) * | 2003-12-26 | 2010-08-18 | 岡本化学工業株式会社 | 平版印刷版用アルミニウム支持体および平版印刷版用原版 |
KR101270671B1 (ko) * | 2011-03-25 | 2013-06-03 | 주식회사 영광와이케이엠씨 | 알루미늄 아노다이징의 봉공처리 조성물 |
DE102012204636A1 (de) * | 2012-03-22 | 2013-09-26 | Nanogate Ag | Behandlung einer anodisch oxidierten Oberfläche |
WO2014004875A2 (en) * | 2012-06-29 | 2014-01-03 | University Of New Hampshire | Treatment of anodized aluminum components |
JP6004181B2 (ja) * | 2013-01-18 | 2016-10-05 | スズキ株式会社 | 陽極酸化皮膜及びその製造方法 |
JP5995144B2 (ja) * | 2013-03-08 | 2016-09-21 | スズキ株式会社 | アルミニウム系部材の修復方法、修復処理液、アルミニウム系材料およびその製造方法 |
JP6418498B2 (ja) | 2014-03-27 | 2018-11-07 | スズキ株式会社 | 陽極酸化処理方法及び内燃機関の構造 |
JP6369745B2 (ja) * | 2014-03-27 | 2018-08-08 | スズキ株式会社 | 陽極酸化皮膜及びその封孔処理方法 |
JP5904425B2 (ja) | 2014-03-27 | 2016-04-13 | スズキ株式会社 | 陽極酸化皮膜及びその処理方法並びに内燃機関用ピストン |
US11124880B2 (en) * | 2016-04-07 | 2021-09-21 | Chemetall Gmbh | Method for nickel-free phosphating metal surfaces |
CA3032691C (en) | 2016-08-12 | 2021-05-18 | Prc-Desoto International, Inc. | Sealing composition |
US10138566B2 (en) * | 2017-01-13 | 2018-11-27 | Macdermid Acumen, Inc. | Sealing anodized aluminum using a low-temperature nickel-free process |
US10801123B2 (en) | 2017-03-27 | 2020-10-13 | Raytheon Technologies Corporation | Method of sealing an anodized metal article |
CN109338434B (zh) * | 2018-11-28 | 2019-11-05 | 广州旭淼新材料科技有限公司 | 常温无镍封孔剂 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2650989C2 (de) * | 1976-11-08 | 1985-01-24 | Henkel KGaA, 4000 Düsseldorf | Verfahren zur Behandlung von Aluminiumoberflächen durch Oxidation mit einer nachfolgenden Verdichtung |
DE2812116C2 (de) * | 1977-03-30 | 1982-06-03 | Yoshida Kogyo K.K., Tokyo | Verfahren zum Aufbringen eines härtbaren Überzugs auf eine gedichtete anodische Oxidschicht auf Aluminium |
US4647347A (en) * | 1984-08-16 | 1987-03-03 | Amchen Products, Inc. | Process and sealant compositions for sealing anodized aluminum |
DE3820650A1 (de) * | 1988-06-18 | 1989-12-21 | Henkel Kgaa | Verfahren zum verdichten von anodisierten oxidschichten auf aluminium und aluminiumlegierungen |
US5411607A (en) * | 1993-11-10 | 1995-05-02 | Novamax Technologies Holdings, Inc. | Process and composition for sealing anodized aluminum surfaces |
-
1995
- 1995-07-07 DE DE19524828A patent/DE19524828A1/de not_active Withdrawn
-
1996
- 1996-06-29 WO PCT/EP1996/002848 patent/WO1997003232A1/de active IP Right Grant
- 1996-06-29 ES ES96924816T patent/ES2135244T3/es not_active Expired - Lifetime
- 1996-06-29 JP JP9505458A patent/JPH11509579A/ja active Pending
- 1996-06-29 KR KR1019980700086A patent/KR19990028786A/ko active IP Right Grant
- 1996-06-29 DE DE59602111T patent/DE59602111D1/de not_active Expired - Fee Related
- 1996-06-29 AU AU65153/96A patent/AU692113B2/en not_active Ceased
- 1996-06-29 EP EP96924816A patent/EP0837956B1/de not_active Expired - Lifetime
- 1996-06-29 CA CA002226418A patent/CA2226418A1/en not_active Abandoned
- 1996-06-29 US US08/983,130 patent/US5891269A/en not_active Expired - Fee Related
- 1996-07-05 AR AR10346196A patent/AR002693A1/es unknown
Also Published As
Publication number | Publication date |
---|---|
DE19524828A1 (de) | 1997-01-09 |
AU6515396A (en) | 1997-02-10 |
KR19990028786A (ko) | 1999-04-15 |
DE59602111D1 (de) | 1999-07-08 |
MX9800083A (es) | 1998-03-31 |
WO1997003232A1 (de) | 1997-01-30 |
AU692113B2 (en) | 1998-05-28 |
EP0837956A1 (de) | 1998-04-29 |
JPH11509579A (ja) | 1999-08-24 |
ES2135244T3 (es) | 1999-10-16 |
CA2226418A1 (en) | 1997-01-30 |
AR002693A1 (es) | 1998-03-25 |
US5891269A (en) | 1999-04-06 |
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