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WO2003013748A1 - Obtention de l'effet lotus par inhibition de la croissance microbienne apres endommagement d'une surface autonettoyante - Google Patents

Obtention de l'effet lotus par inhibition de la croissance microbienne apres endommagement d'une surface autonettoyante Download PDF

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Publication number
WO2003013748A1
WO2003013748A1 PCT/EP2002/007213 EP0207213W WO03013748A1 WO 2003013748 A1 WO2003013748 A1 WO 2003013748A1 EP 0207213 W EP0207213 W EP 0207213W WO 03013748 A1 WO03013748 A1 WO 03013748A1
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WO
WIPO (PCT)
Prior art keywords
particles
ester
self
carrier system
antimicrobial
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.)
Ceased
Application number
PCT/EP2002/007213
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German (de)
English (en)
Inventor
Edwin Nun
Markus Oles
Peter Ottersbach
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.)
Creavis Gesellschaft fuer Technologie und Innovation mbH
Original Assignee
Creavis Gesellschaft fuer Technologie und Innovation mbH
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Filing date
Publication date
Application filed by Creavis Gesellschaft fuer Technologie und Innovation mbH filed Critical Creavis Gesellschaft fuer Technologie und Innovation mbH
Publication of WO2003013748A1 publication Critical patent/WO2003013748A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/12—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group, wherein Cn means a carbon skeleton not containing a ring; Thio analogues thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B17/00—Methods preventing fouling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B17/00—Methods preventing fouling
    • B08B17/02—Preventing deposition of fouling or of dust
    • B08B17/06—Preventing deposition of fouling or of dust by giving articles subject to fouling a special shape or arrangement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B17/00—Methods preventing fouling
    • B08B17/02—Preventing deposition of fouling or of dust
    • B08B17/06—Preventing deposition of fouling or of dust by giving articles subject to fouling a special shape or arrangement
    • B08B17/065—Preventing deposition of fouling or of dust by giving articles subject to fouling a special shape or arrangement the surface having a microscopic surface pattern to achieve the same effect as a lotus flower
    • 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
    • C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
    • 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
    • C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
    • C03C17/007—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • 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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • 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
    • C03C2204/00—Glasses, glazes or enamels with special properties
    • C03C2204/02—Antibacterial glass, glaze or enamel
    • 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
    • C03C2217/00—Coatings on glass
    • C03C2217/40—Coatings comprising at least one inhomogeneous layer
    • C03C2217/42—Coatings comprising at least one inhomogeneous layer consisting of particles only
    • 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
    • C03C2217/00—Coatings on glass
    • C03C2217/40—Coatings comprising at least one inhomogeneous layer
    • C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
    • C03C2217/44—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the composition of the continuous phase
    • C03C2217/445—Organic continuous phases
    • 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
    • C03C2217/00—Coatings on glass
    • C03C2217/70—Properties of coatings
    • C03C2217/77—Coatings having a rough surface

Definitions

  • the present invention relates to self-cleaning surfaces which are given an antimicrobial treatment using reactive formulations.
  • hydrophobic materials such as perfluorinated polymers
  • hydrophobic surfaces are known.
  • a further development of these surfaces consists in structuring the surfaces in the ⁇ m range to the nm range.
  • US Pat. No. 5,599,489 discloses a method in which a surface can be roughened by bombardment with particles of a corresponding size and can be given a particularly repellent finish by subsequent perfluorination.
  • Another method is described by H. Saito et al in "Service Coatings International" 4, 1997, p. 168 ff.
  • particles of fluoropolymers are applied to metal surfaces, with a greatly reduced wettability of the surfaces thus produced against water with a considerably reduced tendency to icing.
  • US Pat. Nos. 3,354,022 and WO 96/04123 describe further methods for reducing the wettability of objects by topological changes in the surfaces.
  • artificial elevations or depressions with a height of approx. 5 to 1,000 ⁇ m and a distance of approx. 5 to 500 ⁇ m are applied to hydrophobic or hydrophobicized materials after structuring.
  • Surfaces of this type lead to rapid drop formation, the rolling drops picking up dirt particles and thus cleaning the surface.
  • WO 00/58410 describes the structures and claims the formation thereof by spraying on hydrophobic alcohols, such as nonakosan-10-ol, or alkanediols, such as nonakosan-5,10-diol.
  • hydrophobic alcohols such as nonakosan-10-ol, or alkanediols, such as nonakosan-5,10-diol.
  • the disadvantage here is the poor mechanical stability of the self-cleaning surfaces and the fact that detergents lead to the detachment of the structure.
  • EP 1 040 874 A2 describes the stamping of microstructures and claims the use of such structures in analysis (microfluidics).
  • the disadvantage of these structures is the insufficient mechanical stability.
  • Colonization with microorganisms is highly undesirable because it makes self-cleaning difficult, if not completely suppressed.
  • Mucus layers are often formed, which can extremely increase the microbial populations, e.g. B. subsequently affect water, beverage and food qualities and can even lead to spoilage of the goods and damage to the health of consumers.
  • the object of the present invention was therefore to provide self-cleaning surfaces and a process for their production which do not lose their self-cleaning effect as a result of adhering bacteria, algae or fungi.
  • self-cleaning surfaces which consist of a carrier material and a particulate system, the carrier material having antimicrobial properties, are covered with bacteria, algae or fungi much more slowly than conventional self-cleaning surfaces after damage to the self-cleaning surface, for example by scratches.
  • the subject of the present invention is therefore a surface according to claim 1, which has an artificial surface structure of elevations and depressions, which has self-cleaning properties, which is characterized in that the surface has a carrier system with antimicrobial properties.
  • the present invention also relates to a method according to claim 8 for the production of surfaces according to at least one of claims 1 to 7 which have self-cleaning properties, which is characterized in that at least one material which has antimicrobial properties is used in the production of the surfaces ,
  • the surfaces of the invention have the advantage that adhesion and spread of biological contaminants, such as. B. bacteria, fungi and algae is significantly slowed down and thus the self-cleaning properties of the surfaces are effectively retained for longer. This is particularly the case when the self-cleaning layer z. B. has been damaged by scratches, since the antimicrobial properties of the carrier system work particularly well at the damaged area.
  • the terms antimicrobial and microbicidal are to be understood to mean one and the same property.
  • these polymers have so-called contact microbicidity.
  • contact microbicidal polymers contain no low molecular weight constituents.
  • the antimicrobial properties are due to the contact of bacteria with the surface.
  • the present invention relates to a surface which has an artificial surface structure of elevations and depressions which has self-cleaning properties, the surface being characterized in that the surface has a carrier system with antimicrobial properties.
  • the surface has at least partially antimicrobial properties after damage to the surface structure.
  • the elevations of the surface structure are at a distance of 50 nm to 200 ⁇ m, preferably 500 nm to 100 ⁇ m and very particularly preferably 0.1 to 20 ⁇ m. It is also advantageous if the elevations of the surface structure have a height of 50 nm to 100,000 nm, preferably 50 to 50,000 nm and very particularly preferably 100 nm to 30,000 nm.
  • the elevations can be structures applied to the surface or through between Indentations that have been made in the surface are elevations.
  • the indentations can be introduced into the surface in particular by embossing or molding structures into the carrier system.
  • the elevations and depressions are formed in that the surface has particles applied to it, which are preferably fixed by the carrier system.
  • Particles which can be used are particles which comprise at least one material selected from silicates, doped or pyrogenic silicates, minerals, metal oxides, silicas. Have metals or polymers. Preferably particles are used which have a particle diameter of 0.02 to 100 ⁇ m, particularly preferably from 0.1 to 50 ⁇ m and very particularly preferably from 0.3 to 30 ⁇ m.
  • the surface structures according to the invention have the individual particles on the surface at intervals of 0-10 particle diameter, in particular of 0-3 particle diameter.
  • the surfaces according to the invention preferably have particles which have hydrophobic properties.
  • the hydrophobic properties of the particles may be inherent due to the material used for the particles.
  • hydrophobized particles can also be used, which, for. B. by treatment with at least one compound from the group of alkylsilanes, perfluoroalkylsilanes, paraffins, waxes, fatty acid esters, functionalized long-chain alkane derivatives or alkyldisilazanes, have hydrophobic properties.
  • the particles may also be present as aggregates or agglomerates, wherein, according to DIN 53 206, aggregates surface or kantenfbrmig each bearing (primary) particles and agglomerates' RMIG each mounted primary huifb (particles) are understood.
  • particles it is also possible to use particles which aggregate from primary particles to form agglomerates or aggregates with a size of 0.2-100 ⁇ m. It can be advantageous if the particles used have a structured surface. Particles which have an irregular fine structure in the nanometer range on the surface are preferably used.
  • the fine structure of the particles is preferably a jagged structure with elevations and / or depressions in the nanometer range.
  • the elevations preferably have an average height of 20 to 500 nm, particularly preferably 50 to 200 nm.
  • the distance between the elevations or depressions on the particles is preferably less than 500 nm, very particularly preferably less than 200 nm.
  • B. craters, crack-like notches, notches, gaps, holes and cavities support the effective structure of the particles in relation to the self-cleaning effect.
  • particles in particular as particles which have an irregular fine structure in the nanometer range on the surface, those particles are preferably used which have at least one compound selected from pyrogenic silica, aluminum oxide, silicon oxide, mixed oxides, pyrogenic silicates or powdered polymers or powdered metals. It can be advantageous if the particles used have hydrophobic properties. Particularly suitable particles are, inter alia, hydrophobicized, pyrogenic silicas, so-called Aerosile ® .
  • the surface according to the invention very particularly preferably has particles which are fixed on the surface by means of a carrier system.
  • the known adhesive or lacquer systems can be used as the basis for the carrier system with antimicrobial properties.
  • Such carrier systems are e.g. B. hot melt adhesive, which have at least one compound selected from the ethylene / ethyl acrylate copolymers, ethylene / vinyl acetate copolymers, polyamides, polyether sulfones, polyisobutenes or polyvinyl butyrals, or lacquers which contain at least mixtures of mono- and / or polyunsaturated acrylates and / or methacrylates and / or have polyurethanes.
  • the carrier system which has antimicrobial properties, has at least one antimicrobial polymer which is selected from at least one monomer from methacrylic acid-2-tert-butylaminoethyl ester, methacrylic acid-2-diethylamino ethyl ester, methacrylic acid-2-diethylaminomethyl ester, acrylic acid-2-tert-butylaminoethyl ester, acrylic acid-3-dimethylaminopropyl ester, acrylic acid 2-diethylaminoethyl ester, acrylic acid-2-dimethylaminoethyl ester, dimethylaminopropyl methacrylamide, diethylamino-propyl-methacrylamide, acrylic acid -dimethylaminopropylamide, 2-methacryloyloxyethyltrimethyl-ammonium methosulfate, methacrylic acid-2-diethylaminoethyl ester, 2-methacryl
  • the carrier system which has a polymer with antimicrobial properties, preferably has an antimicrobial polymer content of from 0.01 to 25% by weight, particularly preferably from 0.1 to 13% by weight and very particularly preferably from 6 to 10% by weight. -%, based on the polymerizable carrier system.
  • the surface according to the invention can have at least one surface of a shaped body made of a material selected from polymers such as, for. B. polyamides, polyurethanes, polyether block amides, polyester amides, polyvinyl chloride, polyolefins, polysilicones, polysiloxanes, polymethyl methacrylates or polyterephthalates, as well as metals, woods, leather, fibers, fabrics, glasses or ceramics.
  • polymers such as, for. B. polyamides, polyurethanes, polyether block amides, polyester amides, polyvinyl chloride, polyolefins, polysilicones, polysiloxanes, polymethyl methacrylates or polyterephthalates, as well as metals, woods, leather, fibers, fabrics, glasses or ceramics.
  • the list of polymeric materials is exemplary and is not limited to these. If the shaped body is a shaped body made of polymer, it can be advantageous if this shaped
  • the surfaces according to the invention are preferably produced using a method according to the invention for producing surfaces with an artificial surface structure which have self-cleaning properties, which is characterized in that at least one material which has antimicrobial properties is used as the carrier system in the production of the surfaces.
  • the surface structure which has elevations or depressions, can itself be produced on the surface on which a carrier system is applied. This can e.g. B. by embossing a negative form in the carrier system and subsequent hardening of the carrier system, or by applying and fixing particles on the surface. The particles can be applied and fixed on the surface in a manner known to the person skilled in the art.
  • the use of a carrier system is used as the chemical method of fixation.
  • Various adhesives, adhesion promoters or lacquers, to which antimicrobial polymers have preferably been added can be used as the carrier system. Additional support systems or chemical fixing methods are apparent to the person skilled in the art.
  • the application of the particles to the surface to produce the surface structure can e.g. B. be carried out so that the carrier system, which can be a curable substance and contains antimicrobial polymer, is applied by spraying, knife coating, brushing or spraying onto a surface.
  • the curable substance is preferably applied in a thickness of 1 to 200 ⁇ m, preferably in a thickness of 5 to 75 ⁇ m.
  • the viscosity of the curable substance is selected so that the particles applied can at least partially sink into the curable substance, but the curable substance or the particles applied to it no longer run when the surface is placed vertically.
  • the particles themselves can be applied by spraying.
  • the particles can be applied by spraying using an electrostatic spray gun. After the particles have been applied, excess particles, that is to say particles which do not adhere to the curable substance, can be removed from the surface by shaking, brushing or blowing off. These particles can be collected and reused.
  • the particles are fixed on the surface by hardening the carrier system, this preferably being done by thermal energy and / or light energy.
  • the carrier system is particularly preferably hardened by light energy.
  • the carrier is preferably hardened under an inert gas atmosphere, very particularly preferably under a nitrogen atmosphere.
  • antimicrobial, UV-curable, thermally curable or air-curing coating systems can serve as carrier systems.
  • Coating systems include paint-like mixtures of monounsaturated acrylates or methacrylates with polyunsaturated acrylates or methacrylates, but also mixtures of the polyunsaturated acrylates or methacrylates with one another.
  • Urethane-based paint systems are also considered coating systems.
  • the mixing ratios can be varied within wide limits.
  • the carrier systems for the production of self-cleaning surfaces can be equipped with antimicrobial agents in a simple manner by adding a reactive mixture of the carrier system from different
  • Monomers, initiators and possibly other additives add a defined amount of antimicrobial polymer. It has proven to be advantageous here that antimicrobial polymers, and not, for example, the monomer or monomers used to produce this antimicrobial polymer, are used in the reactive mixture, since effective antimicrobial finishing can only be achieved by this procedure. After the reactive mixture has reacted (hardened), by means of which the particles are fixed, a carrier system is obtained which has an antimicrobial polymer and therefore itself has antimicrobial properties.
  • the carrier system used preferably has an antimicrobial polymer content from 0.01 to 25% by weight, particularly preferably from 0.1 to 13% by weight and very particularly preferably from 6 to 10% by weight, based on the carrier system.
  • Particles which can be used are particles which comprise at least one material selected from silicates, doped or pyrogenic silicates, minerals, metal oxides, mixed metal oxides, silicas. Have metals or polymers. Preferably particles are used which have a particle diameter of 0.02 to 100 ⁇ m, particularly preferably from 0.2 to 50 ⁇ m and very particularly preferably from 0.3 to 30 ⁇ m.
  • hydrophobic particles which have hydrophobic properties.
  • the hydrophobic properties of the particles may be inherent due to the material used for the particles.
  • hydrophobized particles can also be used, which, for. B. by treatment with at least one compound from the group of alkylsilanes, perfluoroalkylsilanes, paraffins, waxes, fatty acid esters, functionalized long-chain alkane derivatives or alkyldisilazanes, have hydrophobic properties.
  • the particles can also be in the form of aggregates or agglomerates, in accordance with DIN 53 206 being understood as aggregates of flat or edged primary particles (particles) and agglomerates of punctiform primary particles (particles).
  • particles it is also possible to use particles which aggregate from primary particles to form agglomerates or aggregates with a size of 0.2-100 ⁇ m.
  • the particles used have a structured surface.
  • Particles which have an irregular fine structure in the nanometer range on the surface are preferably used.
  • the fine structure of the particles is preferably a jagged structure with elevations and / or depressions in the nanometer range.
  • the elevations preferably have an average height of 20 to 500 nm, particularly preferably 50 to 200 nm.
  • the distance between the elevations or depressions on the particles is preferably less than 500 nm, very particularly preferably less than 200 nm.
  • Those particles which have at least one material selected from silicates or doped silicates, minerals, metal oxides, mixed metal oxides, pyrogenic silicas or precipitated silicas or polymers are preferably used.
  • the particles very particularly preferably have silicates, pyrogenic silicas or precipitated silicas, in particular aerosils, minerals such as magadiite, Al 2 O 3 , SiO 2 , TiO 2 , ZrO 2 and Zn powder coated with Aerosil R 974 or powdery polymers such as e.g. B. cryogenically ground or spray dried polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • Particles with a BET surface area of 50 to 600 m / g are particularly preferably used. Particles with a BET surface area of 50 to 200 m Ig are very particularly preferably used.
  • the particles for generating the self-cleaning surfaces preferably also have hydrophobic properties in addition to the jagged structures.
  • the particles themselves can be hydrophobic, e.g. B. PTFE-containing particles, or the particles used may have been made hydrophobic.
  • the particles can be made hydrophobic in a manner known to the person skilled in the art.
  • Typical hydrophobized particles are e.g. B. Very fine powder such as Aerosil R 974 or Aerosil-R 8200 (Degussa AG), which are commercially available.
  • the carrier system used in the method according to the invention must have the antimicrobial material.
  • Polymers which have been prepared from nitrogen- or phosphorus-functionalized monomers are preferably used as antibacterial materials.
  • Particularly preferred antibacterial materials are those polymers which consist of at least one of the monomers selected from 2-tert-butylaminoethyl methacrylate, 2-diethylaminoethyl methacrylate, 2-diethylaminomethyl methacrylate, 2-tert.-butylaminoethyl acrylate , 3-dimethylaminopropyl acrylic acid, 2-diethylaminoethyl acrylic acid esters, 2-dimethylaminoethyl acrylate, dimethylaminopropyl methacrylamide, diethylaminopropylmethacrylamide, 3-dimethylaminopropylamide, 2-methacryloyloxyethyltrimethylammonium methosulfate, 2-diethyl
  • the particles used also have at least partially antibacterial materials.
  • Such particles can e.g. B. consist of polymers with antimicrobial properties, or coated with such polymers but also other antimicrobial materials.
  • the method according to the invention can be used excellently for the production of self-cleaning surfaces on planar or non-planar objects, in particular on non-planar objects which have antimicrobial properties after the particle layer has been damaged. This is only possible to a limited extent with the conventional methods.
  • non-planar objects such as, for. B. sculptures, not or only partially accessible.
  • the method according to the invention can also be used to produce self-cleaning surfaces on objects with planar surfaces, such as, for. B. greenhouses or public transport.
  • the use of the method according to the invention for the production of self-cleaning surfaces on greenhouses has advantages, since with the method self-cleaning surfaces z. B. can also be produced on transparent materials such as glass or plexiglass and the self-cleaning surface can be made at least sufficiently transparent that sufficient sunlight can penetrate through the transparent surface provided with a self-cleaning surface for the growth of the plants in the greenhouse.
  • greenhouses that have a surface according to the invention according to one of claims 1 to 8, can be operated with longer cleaning intervals.
  • the present invention also relates to the use of the self-cleaning surfaces produced according to the invention for the production of products having antimicrobial surfaces after damage to the same and the products thus produced as such.
  • Such products are preferably based on polymers such as. B. polyamides, polyurethanes, polyether block amides, polyester amides, polyvinyl chloride, polyolefins, polysilicones, polysiloxanes, polymethyl methacrylates or polyterephthalates as well as metals, woods, leather, fibers, fabrics, glasses and ceramics which have surfaces coated with compounds or polymer formulations and structuring agents according to the invention.
  • the list of polymeric materials is exemplary and is not limited to the above.
  • Products of this type containing antimicrobial active carrier systems are, for example, and in particular components of air conditioning systems, coated pipes, semi-finished products, roofs, bathrooms and toilet articles, kitchen articles, components of sanitary facilities, components of animal cages and dwellings as well as materials of so-called textile construction.
  • the self-cleaning coatings with antimicrobial carrier systems can be used wherever there is a lack of bacteria, algae and / or fungi, i.e. H. microbicidal surfaces and surfaces with non-stick properties. Examples of uses for the surfaces according to the invention can be found in the following
  • Wood protection, awnings, textile construction Sanitary Public sanitary facilities such. B. toilets, bathrooms, shower curtains,
  • Machine parts bioreactors, solar systems,
  • Utility articles public transport, truck tarpaulins, animal cages,
  • FIG. 2 shows the test results of Example 1. It can be clearly seen that intact, self-cleaning surfaces have only marginal antimicrobial behavior.
  • Example 3 shows the test results of Example 2. It can be clearly seen that slight damage to the self-cleaning surface brings about the beginning of antimicrobial properties.
  • Example 4 shows the test results of Example 3. It can be clearly seen that the antimicrobial effects increase with increasing destruction of the self-cleaning surface.
  • the characterization of the surfaces is visual and is recorded with +++, which means that water drops form almost completely and the roll angle is below 10 °.
  • the assessment of the microbicidal activity against the test germ Staphylococcus aureus at 30 ° C in water of standardized hardness is indicated with a non-existent reduction in the bacterial count.
  • the surface is characterized visually and is recorded with +++, which means that water drops form almost completely and the roll angle is below 10 °.
  • a 2 x 2 cm piece is sawn out of a plate treated in this way and the microbicidal activity has been tested.
  • the test area was brought into contact with the structured side of the test solution and the bacterial count was determined as a function of time.
  • the assessment of the microbicidal activity against the test germ Staphylococcus aureus at 30 ° C in water of standardized hardness is given with only 0.31 log steps.
  • Example 2 Analogously to Example 1, the monomers are mixed and the coating is carried out. However, the surface is slightly scratched so that the antimicrobial coating layer (the Carrier system) has contact with the nutrient fluid.
  • the assessment of the microbicidal activity against the test germ Staphylococcus aureus at 30 ° C in water of standardized hardness is given with only 0.40 log steps.
  • Example 2 Analogously to Example 1, the monomers are mixed and the coating is carried out. However, the surface is scored more so that the antimicrobial coating layer (the carrier system) is in contact with the nutrient fluid.
  • the assessment of the microbicidal activity against the test germ Staphylococcus aureus at 30 ° C in water of standardized hardness is given as 0.90 log steps.
  • FIGS. 1 to 4 it can be seen that the antimicrobial effect increases with increasing damage to the surface.
  • the desired effect namely the reduction in the occurrence of germs on self-cleaning surfaces, in particular on damaged self-cleaning surfaces, was achieved by the surface according to the invention.

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  • Geochemistry & Mineralogy (AREA)
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  • Agronomy & Crop Science (AREA)
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  • Environmental Sciences (AREA)
  • Toxicology (AREA)
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Abstract

La présente invention concerne des surfaces autonettoyantes qui, après endommagement, présentent des propriétés antimicrobiennes aux endroits endommagés, ainsi qu'un procédé pour les produire. Des objets à surfaces autonettoyantes présentent un intérêt économique grandissant. C'est pour cette raison que l'objectif des progrès dans ce domaine est de préparer simplement des surfaces autonettoyantes qui, après endommagement, présentent des propriétés antimicrobiennes aux endroits endommagés. A cette fin, des polymères antimicrobiens sont incorporés dans des systèmes de revêtement et de peinture pour fixer des agents structurants permettant de produire des surfaces autonettoyantes. Les polymères antimicrobiens sont ainsi intégrés de manière permanente à une surface autonettoyante et deviennent actifs après endommagement de cette surface.
PCT/EP2002/007213 2001-08-10 2002-06-29 Obtention de l'effet lotus par inhibition de la croissance microbienne apres endommagement d'une surface autonettoyante Ceased WO2003013748A1 (fr)

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DE10139572A DE10139572A1 (de) 2001-08-10 2001-08-10 Erhalt des Lotus-Effektes durch Verhinderung des Mikrobenwachstums nach Beschädigung der selbstreinigenden Oberfläche
DE10139572.8 2001-08-10

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004014574A3 (fr) * 2002-07-25 2004-06-03 Creavis Tech & Innovation Gmbh Procede de production de surfaces structurees
WO2004086867A1 (fr) * 2003-04-03 2004-10-14 Degussa Ag Procede permettant d'empecher la formation de moisissures au moyen de substances hydrophobes, et agent anti-moisissures pour parties de batiment
DE10336728A1 (de) * 2003-08-07 2005-03-10 Geberit Mapress Gmbh Rohrleitungssystem für Trinkwasser
WO2006082180A1 (fr) 2005-02-04 2006-08-10 Siemens Aktiengesellschaft Composant presentant un revetement concu pour reduire la mouillabilite de la surface et procede pour le produire
WO2008071175A1 (fr) * 2006-12-11 2008-06-19 Ralf Salvetzki Procédé de production biologique de méthane
EP3395454A1 (fr) * 2017-04-26 2018-10-31 Fast&Fluid Management B.V. Distributeur pour pâtes colorantes

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
DE102006031576A1 (de) * 2006-06-30 2008-01-03 Hansgrohe Ag Verfahren zur Bereitstellung nanostrukturierter Oberflächen auf Kunststoffgegenständen

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WO1996004123A1 (fr) * 1994-07-29 1996-02-15 Wilhelm Barthlott Surfaces autonettoyantes d'objets et leur procede de production
JPH10298451A (ja) * 1997-05-01 1998-11-10 Nitsupan Kenkyusho:Kk 浄化性コーティング用組成物
EP0903389A1 (fr) * 1996-05-31 1999-03-24 Toto Ltd. Element anti-encrassement et composition pour revetement anti-encrassement
EP0909747A1 (fr) * 1997-10-17 1999-04-21 Erlus Baustoffwerke Ag Procédé d'obtention de surfaces auto-nettoyantes
DE19932150A1 (de) * 1999-07-12 2001-01-18 Heinz Hoelter Schmutz- und keimabweisende Lotus-Oberflächenbeschichtung für Solarzellen-Panels
WO2001018077A1 (fr) * 1999-09-09 2001-03-15 Creavis Gesellschaft Für Technologie Und Innovation Mbh Additifs microbicides

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WO1996004123A1 (fr) * 1994-07-29 1996-02-15 Wilhelm Barthlott Surfaces autonettoyantes d'objets et leur procede de production
EP0903389A1 (fr) * 1996-05-31 1999-03-24 Toto Ltd. Element anti-encrassement et composition pour revetement anti-encrassement
JPH10298451A (ja) * 1997-05-01 1998-11-10 Nitsupan Kenkyusho:Kk 浄化性コーティング用組成物
EP0909747A1 (fr) * 1997-10-17 1999-04-21 Erlus Baustoffwerke Ag Procédé d'obtention de surfaces auto-nettoyantes
DE19932150A1 (de) * 1999-07-12 2001-01-18 Heinz Hoelter Schmutz- und keimabweisende Lotus-Oberflächenbeschichtung für Solarzellen-Panels
WO2001018077A1 (fr) * 1999-09-09 2001-03-15 Creavis Gesellschaft Für Technologie Und Innovation Mbh Additifs microbicides

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004014574A3 (fr) * 2002-07-25 2004-06-03 Creavis Tech & Innovation Gmbh Procede de production de surfaces structurees
WO2004086867A1 (fr) * 2003-04-03 2004-10-14 Degussa Ag Procede permettant d'empecher la formation de moisissures au moyen de substances hydrophobes, et agent anti-moisissures pour parties de batiment
US8563010B2 (en) 2003-04-03 2013-10-22 Evonik Degussa Gmbh Method for preventing mold formation by using hydrophobic materials, and mold-controlling agent for building parts
DE10336728A1 (de) * 2003-08-07 2005-03-10 Geberit Mapress Gmbh Rohrleitungssystem für Trinkwasser
WO2006082180A1 (fr) 2005-02-04 2006-08-10 Siemens Aktiengesellschaft Composant presentant un revetement concu pour reduire la mouillabilite de la surface et procede pour le produire
US7935428B2 (en) 2005-02-04 2011-05-03 Siemens Aktiengesellschaft Component with a coating for reducing the wettability of the surface and method for production thereof
WO2008071175A1 (fr) * 2006-12-11 2008-06-19 Ralf Salvetzki Procédé de production biologique de méthane
US8323938B2 (en) 2006-12-11 2012-12-04 Ralf Salvetzki Process for the biological generation of methane
EP3395454A1 (fr) * 2017-04-26 2018-10-31 Fast&Fluid Management B.V. Distributeur pour pâtes colorantes
EP4147799A3 (fr) * 2017-04-26 2023-05-17 Fast & Fluid Management B.V. Distributeur pour pâtes de teinture

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