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WO2007051516A1 - Procede de fabrication de revetements plats biostatiques liberables - Google Patents

Procede de fabrication de revetements plats biostatiques liberables Download PDF

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Publication number
WO2007051516A1
WO2007051516A1 PCT/EP2006/009795 EP2006009795W WO2007051516A1 WO 2007051516 A1 WO2007051516 A1 WO 2007051516A1 EP 2006009795 W EP2006009795 W EP 2006009795W WO 2007051516 A1 WO2007051516 A1 WO 2007051516A1
Authority
WO
WIPO (PCT)
Prior art keywords
particles
biostatic
article
suspension
volatile siloxane
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/EP2006/009795
Other languages
German (de)
English (en)
Inventor
Felix Müller
Volker Schlicht
Patrick Winter
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.)
Evonik Goldschmidt GmbH
Original Assignee
Evonik Goldschmidt GmbH
Goldschmidt 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
Application filed by Evonik Goldschmidt GmbH, Goldschmidt GmbH filed Critical Evonik Goldschmidt GmbH
Publication of WO2007051516A1 publication Critical patent/WO2007051516A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • 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
    • 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
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes

Definitions

  • the present invention is a process for the production of biostatic sheet-like coatings on objects, wherein in the coating hydrophobic particles are applied to the surface of the objects and so a surface structure is created with protrusions on the surface of the articles having biostatic properties.
  • EP-A-0 909 747 teaches a method of producing a self-cleaning surface.
  • the surface has hydrophobic elevations with a height of 5 to 200 microns.
  • Such a surface is prepared by applying a dispersion of powder particles and an inert material in a siloxane solution and then curing. The structure-forming particles are thus fixed by an auxiliary medium on the substrate.
  • WO-A-00/58410 concludes that it is technically possible to make surfaces of articles artificially self-cleaning.
  • the surface structures of elevations and depressions required for this purpose have a spacing between the elevations of the surface structures in the range from 0.1 to 200 ⁇ m and a height of the elevation in the range from 0.1 to 100 ⁇ m.
  • the materials used for this purpose must consist of hydrophobic polymers or permanently hydrophobized material. Dissolution of the particles from the carrier matrix must be prevented.
  • hydrophobic materials such as perfluorinated polymers
  • hydrophobic surfaces are known.
  • a further development of these surfaces is to structure 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 provided in a particularly repellent manner by bombardment with particles of a corresponding size and subsequent perfluorination.
  • Another method is described by H. Saito et al. in "Service Coatings International", 4, 1997, p.168 ff.
  • particles of fluoropolymers are deposited on metal surfaces. brought, with a greatly reduced wettability of the surfaces thus produced was shown to water with a significantly reduced tendency to icing.
  • WO-A-00/58410 describes a process for the production of removable coatings with dirt and water repellent properties, the same being obtained by spraying hydrophobic alcohols, such as nonacosan-10-ol or alkanediols, such as nonacosan-5,10-diol or waxing.
  • hydrophobic alcohols such as nonacosan-10-ol or alkanediols, such as nonacosan-5,10-diol or waxing.
  • These coatings are characterized by strong mechanical forces such. As scratching, brushing or high pressure treatment with water or by treatment with water containing detergents, the dissolve part of the structure builder to remove from the objects. Disadvantages of this are the strong forces that are necessary to remove the coating mechanically again, so that there is always the danger that the article itself is damaged when removing the coating. Treatment with water containing detergents may also cause damage depending on the nature of the article.
  • the object of the present invention was therefore to provide a process for the production of biostatic laminar coatings on objects, in which also objects made of sensitive materials can be equipped with a relatively stable coating which can be removed with simple means.
  • biostatic means that bacterial contamination on the surface by pathogenic germs such as bacteria or fungi and their spores is avoided without the need for disinfection by commercially available biocidal compounds.
  • the present invention therefore relates to a process for the production of detachable biostatic sheet-like coatings on objects, wherein hydrophobic particles are applied to the surface of the objects during the coating and thus have a surface structure with elevations on the surface Surface of the articles is produced, which has water-repellent properties, which is characterized in that the hydrophobic particles are suspended in a highly volatile SiIo- xan and this suspension is applied to at least one surface of an article and the volatile siloxane is then removed.
  • the subject of the present invention are articles which are equipped on at least one surface with a biostatic coating produced by a method according to at least one of claims 1 to 7.
  • the subject of the present invention is the use of the method according to one of claims 1 to 7 for the coating of objects which are exposed to high contamination by microbial contamination, such as walls and furnishings in hospitals, swimming pools or food processing plants.
  • the present invention describes a method by which releasable, dirt, germ and water repellent coatings can be produced.
  • the invention has the advantage that in a simple manner objects of all kinds can be equipped with a biostatic, physiologically acceptable non-permanent layer.
  • the coating according to the invention with a removable soil and germ repellent layer is relatively gentle, since no questionable or aggressive solvents are used and since the detachment of the coating, for example mechanically, such as by rubbing, can take place.
  • the coating produced by means of the method according to the invention is not permanent and is therefore particularly suitable as a protective coating of new objects against contamination, eg. B. during transport or in the sales rooms.
  • hydrophobic particles are applied to the surface of the objects and thus a surface structure is created with protrusions on the surface of the articles having biostatic properties
  • hydrophobic particles are suspended in a highly volatile silicone, which optionally contains a silicon wax dissolved therein, and this suspension is applied to at least one surface of an article and the volatile silicone is then removed.
  • Cyclic and linear siloxanes may be used in admixture with each other, but preferably in admixture with each other.
  • Suitable silicone waxes are all compounds which are liquid at room temperature, ie compounds which have a recrystallization point below room temperature of about 20 ° C., preferably ⁇ 15 ° C., in particular ⁇ 5 ° C., especially those of the general formula (II)
  • R is a hydrocarbon radical, preferably having 10 to 20 C atoms, n is 2 to 85, m is 2 to 60.
  • the suspension may be applied to at least one surface of an article in a manner known to those skilled in the art.
  • the suspension is applied by immersing the article in the suspension and then draining or by spraying the suspension onto the article.
  • the suspension is applied by immersing the article in the suspension and then draining or by spraying the suspension onto the article.
  • coatings which are particularly durable and which have lower scratch and abrasion sensitivity, in particular on polymer surfaces.
  • the suspension is preferably sprayed 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 spraying The suspension is preferably carried out at a pressure of 1 to 5 bar.
  • the removal of the volatile silicone takes place by evaporation or volatilization, wherein the evaporation or volatilization can be accelerated by the use of elevated temperatures or by the use of vacuum or vacuum.
  • Particles which can be used are those which have at least one material selected from silicates, minerals, metal oxides, metal powders, silicas, pigments or polymers.
  • the particles may particularly preferably contain silicates, doped silicates, minerals, metal oxides, aluminum oxide, silicic acids or pyrogenic silicates, aerosils or pulverulent polymers, such as, for example, silicates.
  • the hydrophobic properties of the particles may be inherent in the material of the particles used, such as polytetrafluoroethylene (PTFE). But it can also be used hydrophobic particles which have hydrophobic properties after a suitable treatment, such as. B. with at least one compound from the group of alkyl silanes, fluoroalkylsilanes or disilazane-treated particles. Particularly suitable particles are hydrophobized pyrogenic silicas, so-called aerosils.
  • Example of hydrophobic particles are z. For example, the Aerosil® R 812S or Aerosil® R 8200.
  • the BeSach layers according to the invention can be easily achieved by mechanical processing z. As rubbing, polishing or high-pressure cleaner (water) again from the coated counter- stood detached, but adhere so firmly to the substrates that their performance properties of the invention are given over a practical period.
  • articles which are equipped on at least one surface with a biostatic coating can be produced.
  • the objects or the surfaces to be coated can be made of a variety of materials, such. As metal, plastic, polymer, wood, ceramic or glass.
  • the coating of the surfaces is done by spraying the suspensions with a full cone spray nozzle, e.g. Type GSC-I from Spraying-Systems GmbH. For this purpose, a quantity of 1.5 g of the suspension is weighed into a test tube and this sucked by means of rubber hose from the nozzle and sprayed onto the surface.
  • a full cone spray nozzle e.g. Type GSC-I from Spraying-Systems GmbH.
  • Test surfaces of stainless steel, polypropylene and ceramics are treated by spraying and evaluated visually and with Abklatschgrass: Commercially available Rodac plates are opened, 10s brought into contact with the surface and reclosed. 48 h is incubated at 30 0 C and the colony-forming units (CFU) counted. execution
  • decamethylcyclopentasiloxane (D5) was dispersed with vigorous stirring 2.0 g of a commercially available, hydrophobized fumed silica having a BET surface area of 220 m 2 / g, (Aerosil® R 812 S).
  • siloxane wax (Tegopren® 6814) having a molecular weight of 13000 g / mol and a recrystallization point of ⁇ 5 0 C were dissolved in 97.5 g of decamethylcyclopentasiloxane (D5).
  • D5 decamethylcyclopentasiloxane
  • 2.0 g of a commercially available, hydrophobized fumed silica having a BET surface area of 220 m 2 / g (Aerosil® R 812 S) were dispersed into this solution.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

L'invention concerne un procédé de fabrication de revêtements plats biostatiques sur des objets. Lors du revêtement, des particules hydrophobes sont appliquées sur la surface des objets pour créer à la surface des objets une structuration de surface dotée de reliefs et présentant des propriétés biostatiques. Le procédé est caractérisé en ce que les particules hydrophobes sont mises en suspension dans un siloxane très volatil qui contient éventuellement une cire de silicone dissoute, cette suspension étant appliquée sur au moins une surface d'un objet et le siloxane très volatil étant ensuite éliminé.
PCT/EP2006/009795 2005-10-31 2006-10-11 Procede de fabrication de revetements plats biostatiques liberables Ceased WO2007051516A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005052404.4 2005-10-31
DE102005052404A DE102005052404A1 (de) 2005-10-31 2005-10-31 Verfahren zur Herstellung von ablösbaren biostatischen flächigen Beschichtungen

Publications (1)

Publication Number Publication Date
WO2007051516A1 true WO2007051516A1 (fr) 2007-05-10

Family

ID=37667697

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/009795 Ceased WO2007051516A1 (fr) 2005-10-31 2006-10-11 Procede de fabrication de revetements plats biostatiques liberables

Country Status (2)

Country Link
DE (1) DE102005052404A1 (fr)
WO (1) WO2007051516A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000571A1 (fr) * 2006-06-29 2008-01-03 Evonik Degussa Gmbh Procédé de production d'un revêtement antitache détachable

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010024559A1 (de) 2010-06-22 2011-12-22 Süd-Chemie AG Verfahren zur Herstellung hydrophober Oberflächen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06287515A (ja) * 1993-03-30 1994-10-11 Toray Dow Corning Silicone Co Ltd 表面保護剤
EP1371690A2 (fr) * 2002-06-14 2003-12-17 Rohm And Haas Company Compositions de nanoparticules polymériques et leur emploi dans des revêtements antimicrobiens
DE10226022A1 (de) * 2002-06-12 2003-12-24 Creavis Tech & Innovation Gmbh Verfahren zur Herstellung von Oberflächen mit coagulationshemmenden Eigenschaften
EP1475426A1 (fr) * 2003-04-24 2004-11-10 Goldschmidt AG Procédé de fabrication des revêtements amovibles repoussant à salissure et l'eau

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06287515A (ja) * 1993-03-30 1994-10-11 Toray Dow Corning Silicone Co Ltd 表面保護剤
DE10226022A1 (de) * 2002-06-12 2003-12-24 Creavis Tech & Innovation Gmbh Verfahren zur Herstellung von Oberflächen mit coagulationshemmenden Eigenschaften
EP1371690A2 (fr) * 2002-06-14 2003-12-17 Rohm And Haas Company Compositions de nanoparticules polymériques et leur emploi dans des revêtements antimicrobiens
EP1475426A1 (fr) * 2003-04-24 2004-11-10 Goldschmidt AG Procédé de fabrication des revêtements amovibles repoussant à salissure et l'eau

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000571A1 (fr) * 2006-06-29 2008-01-03 Evonik Degussa Gmbh Procédé de production d'un revêtement antitache détachable

Also Published As

Publication number Publication date
DE102005052404A1 (de) 2007-05-03

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