Classifications

• • 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
  • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
• • 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
  • A01N25/02—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 containing liquids as carriers, diluents or solvents
  • A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
• • 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

Definitions

• the present invention relates to a method for suppressing mold formation on parts of buildings using hydrophobic substances and a mold growth inhibitor for parts of buildings.
• Mold is a fungus that first settles on the surface, later going into depth, on the wall and other materials. Mold stains are individual, usually round, mushroom colonies that have sprouted from a single spore. Mushroom researchers distinguish about 10,000 types of mold, but only a few are found in living spaces.
• fungi In contrast to plants, fungi do not have chlorophyll and are therefore unable to derive their energy from sunlight. Wood or wood components, wall paints, gypsum plaster, potting compost and dead parts of house plants and food serve as energy sources for mushrooms in the living area. Like all living things, mushrooms need water to thrive. If the water is missing, the fungus does not die immediately, but instead forms so-called permanent cells. These enable the mushroom to survive times of need. If growth conditions are favorable again, e.g. sufficient moisture, it continues to grow, "if the" emergency time "was not long enough. The spread and the multiplication of the. Fungi takes place over spores and conidia. They are produced in unimaginably large numbers and" spread in the air.
• mold stains discolouration, so-called mold stains. These are first small and punctiform, then grow larger and eventually grow into a mushroom lawn. After prolonged infestation, the affected building materials are destroyed. The wallpaper is decomposed, wood and paper become brittle, plaster and paint peel off.
• the patent specification DE 199 13 738 C2 describes a method for interrupting the growth of mold on the inner surfaces of a room.
• the surface temperature of the inner surface of a room is raised to a temperature above that of the dew point by thermal energy supplied directly to this surface.
• the resulting temperature difference between the surface temperature of the inside surface of a building wall and the room air temperature depends on the temperature and the humidity of the environment.
• the disadvantage here is the high energy consumption.
• Patent application DE 101 39 574 describes self-cleaning surfaces which have antimicrobial properties.
• the antimicrobial property is achieved in that the coating composition also has antimicrobial polymers in addition to the structure-forming particles. These surfaces inhibit the growth of bacteria, fungi and algae.
• this method has the disadvantage that expensive antimicrobial polymers have to be used.
• a wall covering material for buildings with a mold-preventing effect is described in the published patent application DE 37 30 820.
• the German Amphibolin Works of Robert Murjahn GmbH & Co. KG describe an aqueous coating material with a dirt and water repellent effect.
• the colloidally distributed particles are hydrophobic and / or oleophobic on their surfaces.
• the coating material can contain fungicides as a functional substance. This process can hardly be used afterwards, since a large amount of energy is required both for the production of the hydrogel and for its drying out at a higher temperature over several days.
• the object was therefore to provide a simple method, in particular the
• Treat parts of the building possibly only temporarily, in such a way that these treated surfaces of parts of the building have an inhibiting or even preventive effect on mold growth. It should be easy to use so that the formation of mold can be inhibited or prevented quickly, even if only temporarily. The aim of this procedure is not to remedy the cause, for example cold bridges.
• Mold infestation can be applied. Therefore, the manageability is of crucial importance. Furthermore, the treated parts of the building should not evaporate any toxic or nontoxic substances. i.e. on the. The use of preservatives or fungicides should be avoided in this process.
• the method according to the invention and also the mold growth inhibitor according to the invention cannot be used if the moisture from the part of the building itself reaches its surface, this is the case with waterlogging or capillary moisture in masonry. Furthermore, the method according to the invention is characterized by its simple handling. Another advantage results from the fact that the method according to the invention dispenses with the use of fungicides.
• the present invention therefore relates to a method for suppressing mold formation on parts of buildings using hydrophobic substances, which is characterized in that a dispersion of hydrophobic particles with an average particle diameter of 0.005 to 5 ⁇ m in an organic dispersant onto the front
• the present invention also relates to a mold growth inhibitor for building parts, which is characterized in that it has from 0.1 to 10% by weight of hydrophobic particles having an average particle diameter of 0.005 to 5 ⁇ m dispersed in an organic dispersant.
• the method according to the invention is based on the knowledge of the lotus effect - the self-cleaning of surfaces.
• European patent specification EP 0 990 015 B1 describes a transparent facade coating composition which has at least one synthetic, nanoscale layered silicate which forms a colloidal gel with water. This coating agent is intended to reduce the tendency of a facade to become dirty.
• the particle size of the nanoscale layered silicate is from 5 to 800 nm.
• the process according to the invention for suppressing mold formation in buildings using hydrophobic substances is characterized in that a dispersion of hydrophobic particles with an average particle diameter of 0.005 to 5 ⁇ m, preferably 0.005 to 1 ⁇ m, particularly preferably 0.005 to 0, 5 ⁇ m (the particles are defined in accordance with DTN 53 206) are applied in an organic dispersing agent to the surface to be protected from mold and then the dispersing agent is removed.
• the hydrophobic particles used in the process according to the invention preferably have a surface with an irregular fine structure in the nanometer range, that is to say in the range from 1 nm to 1000 nm, preferably from 2 nm to 750 nm and particularly preferably from 10 nm to 100 nm Understand structures that have heights, serrations, crevices, ridges, cracks, undercuts, notches and / or holes in the above-mentioned distances and areas.
• the fine structure of the hydrophobic particles can preferably have elevations with an aspect ratio of greater than 1, particularly preferably greater than 1.5. The aspect ratio is in turn defined as the quotient from the maximum height to the maximum width of the elevation; in the case of ridges or other longitudinally shaped elevations, the width transverse to the longitudinal direction is used.
• Hydrophobic particles which can be used in the process according to the invention are those which have at least one material selected from silicates, minerals, metal oxides, metal powders, silicas, pigments or polymers.
• Preferred hydrophobic particles are those which comprise a material selected from silicon oxide, aluminum oxide, titanium oxide, zirconium oxide, polytetrafluoroethylene homopolymer, polytetrafluoroethylene copolymers or mixtures thereof or silicates, doped silicates,
• hydrophobic properties of the particles may be inherent due to the material used for the particles, such as, for example, in the case of polytetrafluoroethylene (PTFE).
• PTFE polytetrafluoroethylene
• hydrophobic particles which, after suitable treatment, have hydrophobic properties, such as with at least one connection
• Particularly suitable particles are hydrophobicized pyrogenic silicas, so-called Aerosile ® .
• hydrophobic particles are, for example, Aerosil ® VPR 411, Aerosi ⁇ 8 R202, Aerosil ® VPLE 8241, Aeroxide LEI or Aerosil ® R
• particles which can be rendered hydrophobic by treatment with perfluoroalkylsilane and subsequent tempering are, for example, Aeroperl ® 90/30, Sipernat ® silica 350, aluminum oxide ® C, vanadium-doped zirconium silicate or Aeroperl ® P 25/20.
• Organic dispersants which can be used for the dispersion used in process 20 according to the invention are all dispersants which are liquid at room temperature, in particular alcohols, preferably ethanol and / or isopropanol. Ethanol is particularly preferably used as alcohol. However, it can also be advantageous if the dispersion has a mixture of different alcohols.
• a dispersion of hydrophobic particles is preferably used in the process according to the invention, preferably from 0.1 to 10% by weight, preferably from 0.5 to 5% by weight and particularly preferably from 1.0 to 2.5% by weight .-% of hydrophobic particles based on the dispersant.
• the dispersion used in the process according to the invention can have further components.
• these can have adhesion promoters.
• the dispersions used preferably have no adhesion promoters.
• the dispersion can be applied according to the method according to the invention on surfaces of parts of buildings, preferably on surfaces of walls or ceilings of a building, consisting of stone, concrete, bricks, plaster, plasterboard, joints, paper-based wallpaper and or mineral paints. This can be done by spraying, spreading or rolling.
• building parts made of plastics or with a plastic surface, such as window frames, can also be treated.
• the dispersion is applied by spraying.
• the dispersion is preferably sprayed on by means of a spray device which has a nozzle with a diameter of 0.05 to 2 mm, preferably with a diameter of 0.1 to 0.9 mm.
• the suspension is preferably sprayed at a pressure of 1 to 10 bar, particularly preferably at a pressure of 1 to 5 bar.
• a propane-butane mixture can in particular be used as the propellant.
• the organic dispersant is preferably removed by evaporation or volatilization at room temperature.
• the present invention furthermore relates to a mold growth inhibitor for parts of buildings, which is characterized in that it contains from 0.1 to 10% by weight of hydrophobic particles with an average particle diameter of 0.005 to 5 ⁇ m, preferably from 0.005 to 1 ⁇ m, particularly preferably from 0.005 to 0.5 ⁇ m (the particles are defined in accordance with DIN 53 206) dispersed in an organic dispersant.
• the hydrophobic particles of the mold-inhibiting agent according to the invention preferably have a surface with an irregular fine structure in the nanometer range, that is to say in the range from 1 nm to 1000 nm, preferably from 2 nm to 750 nm and particularly preferably from 10 nm to 100 nm.
• Fine structure is understood to mean structures which have heights, serrations, crevices, ridges, cracks, undercuts, notches and or holes in the above-mentioned distances and areas.
• the fine structure of the hydrophobic particles can preferably have elevations with an aspect ratio of greater than 1, particularly preferably greater than 1.5. The aspect ratio is again defined as the quotient of the maximum
• the width is used transversely to the longitudinal direction.
• the mold-inhibiting agent according to the invention has hydrophobic particles which comprise at least one material selected from silicates, minerals, metal oxides, metal powders,
• the mold-inhibiting agent can preferably have hydrophobic particles which comprise a material selected from silicon oxide, aluminum oxide, titanium oxide, zirconium oxide, polytetrafluoroethylene.
• Homopolymer polytetrafluoroethylene copolymers or mixtures thereof or else silicates, doped silicates, minerals, silicas, Aerosile ® or powdered polymers, such as, for example
• the hydrophobic properties of the particles may be inherent due to the material used for the particles, such as, for example, in the case of polytetrafluoroethylene (PTFE).
• the agent according to the invention may also contain hydrophobic particles which, after a suitable treatment, for example with at least one compound from the group of the fluoroalkylsilanes, the alkylsilanes, the perfluoroalkylsilanes, the paraffins, the waxes, the fatty acid esters, and the functionalized long-chain alkane derivatives or the alkyldisilazanes have hydrophobic properties.
• Particularly suitable particles are hydrophobicized pyrogenic silicas, so-called Aerosile ® .
• hydrophobic particles examples include Aerosil ® VPR 411, Aerosil ® R202, Aeroxide LEI, Aerosil ® VPLE 8241 or Aerosil ® R 8200.
• hydrophobierbarer by treatment with perfluoroalkylsilane and subsequent heating particles are, for example, Aeroperl ® 90/30, Sipernat ® silica 350, aluminum oxide C, vanadium-doped zirconium silicate or Aeroperl ® P 25/20.
• the agent according to the invention preferably has an alcohol as the organic dispersant.
• the agent according to the invention can include all alcohols which are liquid at room temperature, in particular ethanol and / or isopropanol.
• the agent according to the invention particularly preferably has emanol as alcohol.
• the dispersants used for dispersion do not have to be dried beforehand.
• the agent according to the invention preferably has from 0.1 to 10% by weight, preferably from 0.5 to 5% by weight and particularly preferably from 1.0 to 2.5% by weight, of hydrophobic particles, based on the dispersant ,
• the agent according to the invention can have further components.
• the agent according to the invention can have adhesion promoters.
• the agent according to the invention preferably has no adhesion promoters. If the agent according to the invention is applied by spraying, it preferably contains a propellant gas, particularly preferably a propellant gas mixture of propane and butane.
• the experiment took place in Fimikfurt / Main from November 15, 2002 to January 31, 2003.
• the test room was a non-heated room, but was protected against excessive cooling by a frost guard.
• the picture in FIG. 1 shows the right half of the window which was not treated according to the invention after 3 54 months, while the picture in FIG. 2 shows the toe half of the window after an identical period of time which was treated according to the invention.
• the picture in Fig. 2 clearly shows that no molds have settled, in contrast to the picture in Fig. 1, in which the molds can be clearly seen.

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• Life Sciences & Earth Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Health & Medical Sciences (AREA)
• Dentistry (AREA)
• Zoology (AREA)
• Plant Pathology (AREA)
• Environmental Sciences (AREA)
• Engineering & Computer Science (AREA)
• Agronomy & Crop Science (AREA)
• Wood Science & Technology (AREA)
• Pest Control & Pesticides (AREA)
• Toxicology (AREA)
• Chemical & Material Sciences (AREA)
• Dispersion Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Paints Or Removers (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)

Applications Claiming Priority (3)

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• 2003
  • 2003-04-03 DE DE10315128A patent/DE10315128A1/de not_active Withdrawn
• 2004
  • 2004-02-09 WO PCT/EP2004/050099 patent/WO2004086867A1/de not_active Application Discontinuation
  • 2004-02-09 JP JP2006505424A patent/JP4778417B2/ja not_active Expired - Fee Related
  • 2004-02-09 US US10/551,841 patent/US8563010B2/en not_active Expired - Fee Related
  • 2004-02-09 EP EP04709246A patent/EP1608224A1/de not_active Withdrawn

Non-Patent Citations (2)

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