EP1227894A2 - Revetement d'aluminium - Google Patents

Revetement d'aluminium

Info

Publication number
EP1227894A2
EP1227894A2 EP00965807A EP00965807A EP1227894A2 EP 1227894 A2 EP1227894 A2 EP 1227894A2 EP 00965807 A EP00965807 A EP 00965807A EP 00965807 A EP00965807 A EP 00965807A EP 1227894 A2 EP1227894 A2 EP 1227894A2
Authority
EP
European Patent Office
Prior art keywords
coating
substance
stochastic
structured
structuring
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.)
Withdrawn
Application number
EP00965807A
Other languages
German (de)
English (en)
Inventor
Rüdiger Nass
Gerhard Jonschker
Thomas Benthien
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanogate Technologies GmbH
Original Assignee
NANOGATE GmbH
Nanogate Technologies GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19941753A external-priority patent/DE19941753A1/de
Priority claimed from DE10018223A external-priority patent/DE10018223A1/de
Application filed by NANOGATE GmbH, Nanogate Technologies GmbH filed Critical NANOGATE GmbH
Publication of EP1227894A2 publication Critical patent/EP1227894A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/60—Deposition of organic layers from vapour phase
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/08—Flame spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
    • C03C17/30—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/002—Thermal treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/06—Coating with compositions not containing macromolecular substances
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/002—Provisions for preventing vegetational growth, e.g. fungi, algae or moss
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2218/00—Methods for coating glass
    • C03C2218/30—Aspects of methods for coating glass not covered above
    • C03C2218/31—Pre-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates

Definitions

  • the present invention relates to the preambles of the independent claims.
  • the present invention is concerned with the coating of surfaces.
  • surfaces can be coated hydrophobically and / or oleophobically. It has already been proposed to apply a fluorine coating of perfluorinated compounds to the surface of an object. It has also been proposed to provide the surface with fine regular microstructures, to which in turn a hydrophobic and / or oleophobic coating is applied, in particular to the tips of the microstructure. Such a method is described in particular in WO 96/04123.
  • a first disadvantage of the method known from it is that the regular structuring of the surface provided there is complicated. Another disadvantage is that the known self-cleaning surfaces are typically matt and in particular it is not possible to achieve transparency to the desired extent. In particular, at the time of registration of the present invention, it was not possible to make window panes transparent in a self-cleaning manner.
  • the object of the present invention is to provide something new for commercial use.
  • the invention thus first proposes a method for changing the surface property of an object, the surface of which is structured and the structured surface is coated in order to change the surface properties, it being provided that a stochastic surface structure is provided and a coating is applied which has a contact angle of more than 65 ° to water and / or oils and / or a surface energy less than 35 mJ / m 2 .
  • the coating described is hydrophobic and / or oleophobic, as the contact angle, ie contact angle with water and / or oils of over 65 ° shows.
  • the surface properties change in such a way that a self-cleaning effect occurs, ie any dirt that is applied, as far as it can still stick, is removed with water or the like without mechanical rubbing or the like.
  • a first surprising basic knowledge of the present invention thus consists in the fact that a substantial change in the surface properties, in particular self-cleaning, can also be achieved if the surface structures which are coated are not strictly periodic and / or within very narrowly specified tolerance limits - will be maintained, but that positive effects can also be generated with a stochastic surface structure.
  • a particular advantage is that a clear, non-matt, in particular transparent and / or colorless coating can be produced in this way, which is also self-cleaning.
  • the object can be manufactured with a stochastic surface.
  • a first variant consists in applying a UV-crosslinkable substance to an object and creating a partial crosslinking. The areas that have not been UV-hardened can then be etched away and / or removed in another way.
  • the surface is exposed to a stream of material in order to produce the structuring.
  • the material jet can on the one hand have an abrasive structuring effect, for example like a sandblast or a shot peening.
  • the material beam can apply structuring material in a stochastic manner. It is possible and preferred for certain applications to treat the surface to improve adhesion during or before the stochastic application of material. Further it can it is likely to apply material stochastically to an object that has been preheated at least on the surface.
  • a reactive fluid flow in particular by flame treatment with a reactive gas flame.
  • Propane, butane or natural gas is used as the flame gas in preferred processes.
  • Formers of organic structures can be added to this flame gas.
  • hydrogen can also be used as the flame gas. This allows flame temperatures around 2,000 ° C.
  • the use of other flammable gases such as acetylene etc. is also conceivable.
  • the inorganic structuring agent before the combustion. This can be done, for example, by bubbling the flame gas through an appropriate solution or by using a gaseous or low-boiling inorganic structuring agent which is mixed with the possibly liquid or liquefied flame gas.
  • the inorganic structuring agent m can be mixed into the flame, in particular dusted.
  • the inorganic structure former can be processed as a very thin powder, in particular nanopowder.
  • a preferred material for the inorganic structure Formers are silicon compounds, in particular silanes, in particular alkoxysilanes, siloxanes. It is possible, in turn, to add additives to such structure formers which soften or melt the inorganic structure formers at lower temperatures and / or change the properties of the surface structure, for example increasing the hardness and / or abrasion resistance.
  • boron-containing, titanium-containing, alkali-containing and / or zirconium-containing substances are suitable as additional substances for the inorganic structuring agents.
  • the material applied in a stochastically structured manner, flamed in the particularly preferred method is compacted after it has been applied, or, in the case of a heated object, is compressed during its application and until it cools, which is achieved in particular thermally by heating to a temperature, in particular below the Melting or softening point can take place.
  • the compression or thermal aftertreatment of the structuring material leads in particular to an increase in the abrasion resistance. This is not yet fully understood; however, it is assumed that the thermal aftertreatment leads to a rounding off of the structure tips. This is indicated by the fact that particularly good post-treatment results can be achieved by post-flame treatment with a flame which is mixed with little or no inorganic structuring agent.
  • the material can be heated in an oven, but also by irradiation with electromagnetic radiation, in particular by means of infrared and / or UV light or, preferably, pulsed lasers.
  • electromagnetic radiation in particular by means of infrared and / or UV light or, preferably, pulsed lasers.
  • sufficient porosity can be provided in another way, for example in the case of ceramic bodies by applying a pre-fired, ground ceramic mass to a still green body.
  • substances such as wood flour that can be burned out in the manufacture of ceramic bodies, for example, the material that burns out leaving the pores behind.
  • suitable porous materials include aerogels.
  • the material with the object to which it is applied can be heated together in further object production steps for densification. It is therefore in particular not necessary to carry out the structuring on the finished article.
  • a particularly relevant example for the structuring of an object that has not yet been completely completed is, for example, the production of flat glass, in particular of toughened safety glass.
  • the structuring material in a hardening and / or adhesion-promoting atmosphere.
  • an ammonia, boric acid, Hydrogen fluoride and / or sodium-containing atmosphere can be used.
  • the structures are typically formed in stochastic patterns distributed over the surface of the object, and their height will also vary stochastically. However, it is possible to use comparatively low heights, which reduces the necessary flame times. However, it was found that when using commercial flame treatment devices such as the manual flame treatment devices, the flame treatment times given there lead to rather unsatisfactory results. A good result with regard to the flame duration can be achieved with flame durations which are approximately 2 to 4 times longer than those specified by the manufacturer of the manual flame device. The specified by the manual flame device manufacturer SurA GmbH
  • Layer data according to which the layer thickness should be approximately 0.15 ⁇ m according to the method recommended there, suggests that layer thicknesses with typical maxima of 0.3-0.6 ⁇ m arise in the present case. Accordingly, these are preferred.
  • a coating is selected which has a measurable vapor pressure at elevated temperature and which is applied by exposing the microstructured surface to vapor or vapor.
  • the coating substance can, in particular, be evaporated from a heated supply and / or a heated nozzle.
  • a fluorinated substance with a measurable vapor pressure to build up the coating is advantageous, irrespective of the type of application, since the measurable vapor pressure leads to a uniformity of the layer that forms during the crosslinking that takes place in the heated state; this seems to avoid that an incomplete and / or perforated coating arises due to autophobic effects.
  • the temperature of the coating substance higher than that of the object. This has the advantage that the substance condenses or deposits on the colder object and thus causes the layer to build up. It is preferred if the temperature of the substance is higher than that of the object, but the temperature of the object is still so high that the substance still readily crosslinks on the object.
  • Fluorosilicon compounds are preferably chosen as substances. Monomers as well as dimers or other oligomers can be used.
  • Perfluoroalkylsilanes in the sense of the present application are, in particular, silanes having a group which is fluorinated several times, but not necessarily completely, and which are spaced from the Si atom via a spacer which is typically two CH 2 groups long. Attention is drawn to the compounds according to EP 0 587 667 (WO 92/21729). Oligomeric condensates of perfluoroalkylsilane monomers can be used for the substance, which are oligomerized in particular to the extent that a still measurable vapor pressure is present.
  • the oligomerization is advantageous because these oligomer substances are easier to handle than monomers and still a measurable one Have vapor pressure, i.e. neither decompose due to high temperatures, nor cross-link at lower temperatures.
  • the degree of oligomerization is preferably selected such that between 3 and 25, preferably between 15 and 20, monomers are oligomerized. These can still network well.
  • reactive monomers can also be used. These can have their reactivity, in particular due to the presence of reactive OH groups.
  • the cross-linking on the stochastic structures leads to a permanent coating, especially if they are rounded.
  • hydrofluoroether as the solvent. It should be mentioned that when producing the objects from glass, where the clarity and / or the transparency and / or the gloss of the coating is particularly advantageous, other reflection properties also occur to a limited extent. In heat collectors and photovoltaic cells, this not only leads to advantages due to the high level of cleanliness, but also improves the efficiency of the device per se.Treatable, for example, are plastic foils, such as those used for traffic signs, which should remain clean despite negative influences and also should be easily recognizable and true to color despite coatings.
  • the glass plate treated in this way is post-annealed at 500 ° C. for 8 h. With this post-tempering, the material stochastically applied by reactive gas flame is presumably compressed, which later increases the abrasion resistance.
  • the glass plate is then tempered for 2 hours in a forced-air oven at 260 ° C. together with an oligomer of fluoroalkyltriethoxysilane and dimethyldiethoxysilane located in an open shell. Oligomer evaporates and strikes also on the structured surface. The vapor pressures and steaming times are chosen so that the previously selected microstructure is not completely leveled.
  • a glass pane made of conventional window glass is flamed as in the example described above and then subjected to an ESG process (single-pane safety glass) in an industrial tempering furnace. After cooling, it is vaporized or vaporized in the manner described above with an oligomer of fluoroalkyltriethoxysilane and dimethyldiethoxysilane.
  • the glass pane is visually not of an untreated one
  • a polycarbonate pane is flamed with the burner flame, as described in Example 1, in such a way that the surface is not visually degraded and is provided with an invisible SiO 2 layer.
  • the flamed polycarbonate pane is then immersed for 5 seconds in a dip tank which contains a 1% solution of 1H, 1H, 2H, 2H-tridecafluorooctyltrichlorosilane in gasoline.
  • This is a perfluorinated compound in which a non-fluorinated spacer is present between the perfluorinated group and the Si atom.
  • Such a molecular structure is particularly preferred for purposes of the invention.
  • the excess gasoline is rinsed off with water. An extremely water-repellent coating is obtained.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Biotechnology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

La présente invention concerne la réalisation d'un revêtement en particulier sur de l'aluminium. Selon l'invention, une couche est déposée sur l'aluminium, ladite couche est traitée à la chaleur et subit finalement un traitement ultérieur. Le procédé permet d'obtenir de meilleures caractéristiques de surface.
EP00965807A 1999-09-02 2000-09-01 Revetement d'aluminium Withdrawn EP1227894A2 (fr)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
DE19941753 1999-09-02
DE19941753A DE19941753A1 (de) 1999-09-02 1999-09-02 Verfahren und Stoffe
DE19945513 1999-09-23
DE19945513 1999-09-23
DE19946280 1999-09-27
DE19946280 1999-09-27
DE10018223 2000-04-12
DE10018223A DE10018223A1 (de) 1999-09-23 2000-04-12 Aluminiumbeschichtung
PCT/DE2000/002989 WO2001017694A2 (fr) 1999-09-02 2000-09-01 Revetement d'aluminium

Publications (1)

Publication Number Publication Date
EP1227894A2 true EP1227894A2 (fr) 2002-08-07

Family

ID=27437802

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00965807A Withdrawn EP1227894A2 (fr) 1999-09-02 2000-09-01 Revetement d'aluminium

Country Status (4)

Country Link
EP (1) EP1227894A2 (fr)
AU (1) AU7643400A (fr)
DE (1) DE10082633D2 (fr)
WO (1) WO2001017694A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5739313A (en) 1995-11-13 1998-04-14 Regents Of The University Of Minnesota Radionuclide labeling of vitamin B12 and coenzymes thereof
EP1272284A2 (fr) * 2000-03-20 2003-01-08 Induflex Sondermaschinenbau Surface, son procede de realisation ainsi qu'objet presentant ladite surface
DE10063739B4 (de) 2000-12-21 2009-04-02 Ferro Gmbh Substrate mit selbstreinigender Oberfläche, Verfahren zu deren Herstellung und deren Verwendung
DE10106213A1 (de) 2001-02-10 2002-08-22 Dmc2 Degussa Metals Catalysts Cerdec Ag Selbstreinigende Lackbeschichtungen und Verfahren und Mittel zur Herstellung derselben
CN116265655A (zh) * 2021-12-17 2023-06-20 华为技术有限公司 超双疏纤维制件、纤维制件的制备方法和电子设备

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4836136A (en) * 1987-03-05 1989-06-06 Minolta Camera Kabushiki Kaisha Developer supplying member
JPH03153859A (ja) * 1989-11-08 1991-07-01 Sekisui Chem Co Ltd 表面改質プラスチック
US5674625A (en) * 1993-11-10 1997-10-07 Central Glass Company, Limited Multilayered water-repellent film and method of forming same on glass substrate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0117694A2 *

Also Published As

Publication number Publication date
WO2001017694A2 (fr) 2001-03-15
DE10082633D2 (de) 2001-12-13
AU7643400A (en) 2001-04-10
WO2001017694A3 (fr) 2001-10-25

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Owner name: NANOGATE TECHNOLOGIES GMBH