WO2005028124A1 - Procede de modification de surface de substrats a revetement - Google Patents

Procede de modification de surface de substrats a revetement Download PDF

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Publication number
WO2005028124A1
WO2005028124A1 PCT/EP2004/009615 EP2004009615W WO2005028124A1 WO 2005028124 A1 WO2005028124 A1 WO 2005028124A1 EP 2004009615 W EP2004009615 W EP 2004009615W WO 2005028124 A1 WO2005028124 A1 WO 2005028124A1
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Prior art keywords
coating
additive
film
coating agent
substance
Prior art date
Application number
PCT/EP2004/009615
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German (de)
English (en)
Inventor
Matthias Koch
Kerstin Motzkat
Original Assignee
Henkel Kommanditgesellschaft Auf Aktien
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Publication date
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Publication of WO2005028124A1 publication Critical patent/WO2005028124A1/fr

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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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
    • B05D3/107—Post-treatment of applied coatings
    • B05D3/108—Curing
    • 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
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B05D1/286—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers using a temporary backing to which the coating has been applied
    • 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
    • B05D1/40—Distributing applied liquids or other fluent materials by members moving relatively to surface
    • B05D1/42—Distributing applied liquids or other fluent materials by members moving relatively to surface by non-rotary members
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
    • B05D3/107—Post-treatment of applied coatings
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • 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

Definitions

  • the invention is in the field of modification of surfaces coated with coating compositions, in particular for the finishing of coated surfaces with special functional properties such as scratch resistance, dirt repellency, optical appearance, structuring, antiseptic or biocidal action, an additive being applied to the surface of the coating composition and this then crosslinked or cured after the modification.
  • the coating of metallic or non-metallic objects is widespread.
  • the surfaces are often pretreated, on the one hand to achieve decorative effects, and on the other hand to maintain certain product properties.
  • Colorless or colored coating agents are used as coatings, which contribute significantly to the properties of the product.
  • Colored lacquers can have a decorative effect, colorless lacquers plastically emphasize the surface, lacquers with certain admixtures produce special properties, e.g. biocidal properties, adhesion properties or corrosion protection.
  • the service life of the substrates for the respective purpose is significantly increased.
  • the admixtures are usually introduced by simply mixing the active substance with the coating agent. Methods are also known for specifically influencing the surface by applying the admixture, for example by spraying. The strength or duration of the desired effect can generally be influenced by the amount of the admixture. From DE 101 18 345 surfaces and methods for producing the same are known in which the surface of a substrate is coated with an uncured one Coating is provided as an adhesive, coupling agent or varnish, and a finely divided, preferably hydrophobic powder is sprayed and pressed onto this surface, and the coating is then cured. After crosslinking, unnecessary, non-embedded powder is removed.
  • EP 0576419 describes thermoplastic films which are transferred to the roughened thermoplastic film via a carrier film with pigment particles dispersed in the binder by heat.
  • a method and the coated substrates are known from DE 101 44 531, in which a metal surface is provided with a coating agent, this is covered with a film and then the lacquer layer is crosslinked by means of radiation!
  • the coating agent can optionally contain various admixtures in order to achieve special properties. After the coating has crosslinked, the film can be removed.
  • the above-mentioned procedure by adding an admixture to a coating agent has the disadvantage that if one wishes to change certain properties of the coating by adding additives, a higher amount of the additive in the entire coating agent is required in order to achieve a sufficient effect on the surface.
  • An otherwise appropriate addition to the underside of the coating can also cause problems, for example bad ones Liability to be a cause.
  • One way to get an increased concentration of the additive on the surface is to create a concentration gradient.
  • an enrichment on the surface only takes place if the physical parameters of the admixture and the coating agent cause the homogeneous coating to separate. Such segregation effects are difficult to control.
  • Another possibility is a multiple coating with layers of different compositions, the additive being present in a higher concentration in the outer layer. This procedure is very complex to carry out.
  • the object of the invention is therefore to provide a method for finishing non-crosslinked coated surfaces, in which a predetermined amount of an additive is introduced into the upper layer of the coating, this composite is then hardened, and thereby a permanent modification of the surface is achieved with the desired properties.
  • the object is achieved by a method in which a coating agent is applied to a substrate, which is coated in a not or not completely cured or crosslinked state with a carrier film which is coated with at least one additive on the side of the surface facing the coating , and then the coating agent is crosslinked, the carrier film being removed from the substrate immediately or at a later time after the crosslinking.
  • Another embodiment of the invention relates to a method in which the additive has a concentration gradient from the coating surface into the interior of the coating. Another embodiment relates to a method in which the additive is introduced in a form such that a slow release of an active substance from the additive to the coating surface takes place and a permanent effect is achieved with volatile additives. Another embodiment relates to a method in which the coating is treated with an embossing film with the additive and the surface is thus additionally processed spatially.
  • Another embodiment relates to a method in which the additive which gives the surface special properties is in powder form.
  • the invention also relates to substrates which are provided with a surface coating modified by the process.
  • the method according to the invention can be carried out on different substrates. These are provided with a coating in a known manner.
  • the coating agent used can be solid, pasty or liquid. It is essential to the invention, however, that the coating is not or not fully cured or assumes a viscous state of aggregation before or during the application of the film.
  • a film is then applied to the coating. This is previously coated with the additive on the side facing the coating. This additive should only adhere to the film so that a substantial part of the additive can be transferred to the surface of the coating.
  • the film should be applied without bubbles to ensure that the entire surface of the substrate is evenly brought into contact with the additive.
  • the coating composition is cured in a known manner. This can involve physical and / or chemical hardening processes. For example, curing can take place physically by cooling, or chemical crosslinking can be achieved thermally or by radiation. After crosslinking, the film is removed from the substrate immediately or later.
  • the additive is transferred and a high concentration of the additive is obtained on the surface.
  • penetration of the additive into deeper areas of the coating can be determined. It a concentration gradient is formed. This can be done by migration or diffusion of parts of the additive, but the solid can also be enclosed by the coating agent. If solid powdery additives are used, these can optionally also be dissolved or suspended in the coating agent and diffuse into the coating, but it is also possible that parts of the powder are pressed deeper into the coating due to the mechanical load when the film is applied, and so on a concentration gradient is formed. As the concentration of a substance on or near the surface is important for many properties, a fully functional modified coated substrate is obtained in this way.
  • the method according to the invention is suitable for various substrates.
  • the substrate can consist of metallic materials, but it can also consist of plastics or natural materials.
  • metals and their alloys such as ferrous materials, such as steel; Light metals such as aluminum, magnesium, titanium; Non-ferrous metals such as copper, zinc; Tin precious metals such as platinum, gold, silver; Plastics, such as polyurethane, polycarbonate, polyester; Wood materials such as MDF boards, wood, mineral surfaces such as glass or ceramics are suitable.
  • Metallic substrates are particularly preferred.
  • the surface of the substrates can be pretreated or already provided with one or more coatings.
  • the substrate can have any shape, but is preferably in the form of plates, sheets or strips.
  • the surface of the substrates is coated with a coating agent.
  • the substrate Before coating, the substrate should be essentially free of dust and grease; if necessary, it is subjected to cleaning or pretreatment.
  • Various coating agents known per se which can be hardened or preferably chemically crosslinked, can be applied as coating agents in the process according to the invention. However, they should generally be solvent-free when the film is applied, ie only contain small amounts from the manufacturing process or the application process of the coating agent.
  • Preferred examples of such coatings are coating compositions which can be crosslinked thermally or by radiation. It can be 1-component or multi-component coating agent.
  • the coating compositions can be liquid or, if appropriate, also in powder form. After application to the substrate, they form a homogeneous coating; if necessary, they are heated and can flow.
  • Partial gelation can also take place, but the coating layer must not yet be completely crosslinked.
  • An additional embodiment uses non-crosslinking coating agents that can be applied and flowed when hot, that physically cure at ambient temperature. Such coating compositions are also known to the person skilled in the art.
  • the binders of the coating compositions can be based on polyurethanes, polyesters, PVDF resins, polyacrylates or epoxy resins.
  • the crosslinking can be carried out by free-radical or ionic polymerization of polymers containing double bonds, it can be carried out by reaction of reactive groups such as amine and isocyanate groups, it can be carried out by splitting off blocking protective groups, e.g. of blocked isocyanate groups.
  • coating compositions which crosslink according to a radical and / or cationic reaction mechanism.
  • Such coating compositions are widely known in the literature and have been described for various purposes. It can be clear lacquer layers or pigmented systems.
  • Liquid or powder coating agents can be applied.
  • the coating compositions can contain initiators. Thermal polymerization can be carried out using suitable initiators.
  • coating agents are preferred which contain photoinitiators and can be crosslinked by actinic radiation.
  • Such systems in the case of systems which harden by the free radical mechanism - consist, for example, of at least one polymer, prepolymer or having free-radically polymerizable unsaturated groups
  • These can be leveling agents, solvents, adhesion promoters, thixotropic and anti-settling agents, pigments or dyes, and in particular polymerization initiators.
  • prepolymers based on (meth) acrylate resins, optionally with other comonomers have been found to be suitable.
  • the initiators can be activated thermally or are photoinitiators. Examples of suitable coating systems curing by polymerization are described in DE-A 199 56 659, DE-A-199 25 631, US 59 87 727, WO 2001091926 or EP 0783534.
  • such formulations consist, for example, of at least one polymer, prepolymer, oligomer or a monomeric component which has an oxirane group, and the auxiliaries and additives customary in lacquer listed above.
  • the coating compositions to be applied in the process according to the invention can be selected with a view to their later use. If the coated substrates are deformed, flexible coating layers are preferably favorable after crosslinking. The layers can be colorless to keep the substrate visible, but they can also be colored by dyes or pigments.
  • the coating compositions can be applied in a known manner. Such processes are, for example, the spray systems commonly used in painting technology, such as airless, air-assisted or electrostratically assisted spray processes.
  • the coating agent is preferably applied to a flat workpiece or metal strip surface by flooding / squeezing, spraying / squeezing, suitable scraper or roller applications, for example in a roll coater.
  • Such processes are known and are used in the coil coating process or similar processes for the surface finishing of Metal strips or metal plates are used and can be adapted depending on the specified system.
  • the coating composition according to the invention is generally applied at temperatures between 10 and 150 ° C., but preferably at 15 ° and 75 ° C. A smooth, closed surface is to be obtained, and the flow of powder coatings, for example, can be supported by elevated temperature.
  • the coating layer can later be crosslinked thermally, in which case coating compositions with reactive chemically crosslinking functional groups are used, the coating is preferably crosslinked by actinic radiation, such as UV radiation, electron radiation or ⁇ radiation.
  • the electron radiation should have energy values between 50 and 500 keV.
  • Crosslinking by UV radiation is preferred, in particular with a wavelength of 150 to 800 nm, particularly preferably between 200 and 450 nm.
  • Corresponding radiation sources are known to the person skilled in the art.
  • the radiation intensity and the duration of the radiation depend on the process conditions, e.g. Radiation source distance or relative movement between source and substrate. However, the duration is generally less than 60 seconds, preferably between 0.001 and 30 seconds.
  • the respective plant parameters can be determined by a person skilled in the art by adaptation. However, the crosslinking should not be carried out immediately after the application, but only after the application of a film coated with the additive to the coated surface.
  • the layer thickness of the coating to be cured is 0.1 to 500 ⁇ m, preferably up to 100 ⁇ m, particularly preferably between 0.5 to 50 ⁇ m.
  • a carrier material e.g. B. applied a carrier film which is coated with at least one additive.
  • This film should be tear-resistant. It is resistant to the ingredients of the coating agent.
  • the film should be stable under the crosslinking conditions and should not react with the coating agent. You should not additive permanently tie. Examples of such materials are e.g. B. silicon-coated polymer films.
  • thermal crosslinking the film should be stable at the necessary crosslinking temperatures; in the case of crosslinking by radiation, a film which is permeable to the high-energy radiation used is applied to the substrate.
  • a machine application process is preferably carried out, in particular in the case of flat substrates.
  • the tear-resistant film can be pulled off a supply roll, adherently coated with the additive, and applied bubble-free to the substrate surface previously coated with coating agent by means of a roller.
  • the application of the film can be supported by external force, e.g. by pressing with a roller or by applying a vacuum.
  • the parameters must be selected depending on the coating agent, film and substrate.
  • the pressure can, if necessary, influence how far the additive penetrates into the surface. Embedding in the surface can also be supported by elevated temperature.
  • the coating agent is crosslinked.
  • the film consists, for example, of polyethylene, polypropylene, PET or mixtures thereof. It can be colored or transparent. It is tear-resistant so that it can be removed from the substrate surface immediately or in a later processing step by peeling it off. This can also be done by the end user, so that the film can additionally serve as protection for the object during further processing and / or transport. The film can be discarded or used again.
  • Another preferred embodiment applies the additive with a carrier film which is designed as an endless belt.
  • the film surface is cleaned if necessary, then the additive is applied to one side, and then this side of the film is brought into contact with the coated surface.
  • the coating agent is then crosslinked and the film is immediately removed again.
  • Devices for the continuous endless conveying of films or tapes are known to the person skilled in the art.
  • the surfaces of the crosslinked surface obtained after removal of the carrier material are usually smooth.
  • Another embodiment of the invention uses a film which has an embossed structure on the side for applying the additive. This makes it possible to introduce a spatial structure into the surface in addition to the modification with the additive. Such structures can support a dirt-repellent effect, for example.
  • a flowable substance can be used, for example, by dipping, spraying, knife coating, inkjet method or other casting techniques, e.g. Curtain flow technique.
  • Powdery substances can be applied, for example, by spraying, as a suspension or electrostatically.
  • the additive should only adhere to the surface of the film in such a way that it can be transferred to the coating surface.
  • One additive can be applied, but mixtures of several additives can also be applied.
  • the amount of the substance on the coating surface can be influenced by the amount applied to the film. The .
  • the amount transferred on the surface of the coating also depends on the contact time between the film and the coating agent before curing.
  • the concentration of the additives can be specifically controlled via this parameter.
  • the contact time of the film with the coating before crosslinking depends on the choice of additive and coating agent. It should be so long that a sufficient amount of the additive is transferred to the surface.
  • the contact should be at least 0.1 seconds before the coating crosslinks, but the time can also be longer, e.g. B. 1 sec. To 10 min. or more.
  • the additive can migrate into the surface, or it is embedded in the surface, and a decreasing concentration gradient can preferably form in the depth of the coating.
  • the gradient is for example, influenced by the viscosity of the additive or the coating agent, the compatibility of the additive / coating agent, the duration of the contact time in the uncrosslinked state and the amount of the additive.
  • the coating is cured or crosslinked.
  • the curing or crosslinking is carried out using the methods described above.
  • the concentration gradient that may be formed can still change even after the coating agent has crosslinked.
  • the film can be removed again, either immediately, e.g. B. with a circumferential film or only after a long time.
  • the surfaces can be treated with various additives.
  • the equipment and the selection can be made according to the desired properties of the coating, and several additives can also be combined. Those skilled in the art can select such additives accordingly.
  • additive is understood only to mean those substances which are not coating agents and which on their own do not form any coatings, for example no lacquer or adhesive layers. These are substances which may also be present as a constituent in coating compositions, for example in dispersed or dissolved form. In the method according to the invention, however, they are only transferred via the carrier film. It is also possible that these additives react chemically with components of the coating agent. Such additives are then firmly built into the polymer matrix of the coating. Possibly.
  • additives it is also possible to mix the additive with a small amount of a substance which can react with the coating agent or which aids in diffusion of the additive into the coating agent.
  • Another procedure introduces a powder as a matrix as an additive, which contains slowly volatile substances or substances that diffuse out of the matrix.
  • Additives that are difficult to tolerate or incompatible can also be incorporated into the coating. Examples of additives are biocidal, biorepulsive, biostatic or antiseptic substances, lubricating substances, adhesion or wetting substances, chemical activity or catalytic substances, surface hardness changing substances, chemical molecule-absorbing substances, pigmenting substances.
  • antibacterial or biocidal compounds can be contained in the coating agent.
  • organic substances such as betaines, phenol and phenol derivatives (e.g. 4-chloro-3,5-xylenol, 4,6-dichloro-3,5-xylenol, 2-benzyl-4-chlorophenol, 2,2 '-Methylenbis (4-chlorophenoI), 2-phenylphenol), chlorine or hypochlorite-releasing compounds such as -chloro-4-methylbenzenesulfonamide, ⁇ /, / V-dichloro-4-methylbenzenesulfonamide and polymeric analogs, 1, 3-dichloro- 5,5-dimethylhydantoin, trichloroisocyanuric acid; iodophors; 3-iodo-2-propynyl butyl carbamate; quaternary ammonium compounds such as ⁇ / -benzyl-
  • Another preferred embodiment is the use of substances that chemically influence the surface.
  • substances are, for example, hydrophobizing compounds such as alkyl-, silicone- or perfluoro group-containing substances, hydrophilizing compounds such as substances with a high number of polar groups such as OH, NH, COOH, PO 3 H, -CH 2 -O-CH 2 -.
  • hydrophobizing compounds such as substances with a high number of polar groups such as OH, NH, COOH, PO 3 H, -CH 2 -O-CH 2 -.
  • These can be applied to the surface of the coating as a powder or as a liquid. In this case it is preferred if the applied compounds react with functional groups of the coating agent. This means that the surface can be permanently modified.
  • powders can be powders that are inert and modify the coating surface. Examples include nanoscale powders made from aluminum oxide, silicon oxide, zirconium oxide or boron nitride.
  • powders which have cavities in which other more volatile compounds are incorporated.
  • Such powders are, for example, finely divided zeolites, cyclodextrins and their derivatives.
  • Another embodiment uses other chemical substances or cavity molecules as an additive, such as crown ethers, cucurbiturils, calixarenes, phthalocyanines or other chelating agents.
  • Such voids in powders or molecules form host-guest complexes, e.g. together with fragrance or aroma substances that release the stored substance over a longer period of time.
  • the host substance is selected in accordance with the guest molecule.
  • the coating composition As a guest molecule, it is also possible to introduce compounds which, as a pure substance, are incompatible with the coating composition or which can lead to undesirable reactions when crosslinked.
  • the powders are to be introduced into the coating so that they are essentially embedded in the binder.
  • a concentration gradient can also be generated here by the pressure and the flowability of the coating agent. The aim is to create a smooth surface that has no structure due to the powder on the surface.
  • Another preferred embodiment is the use of substances as additives which have a catalytic activity.
  • Such catalytic properties are, for example, radical-forming substances, such as organic metal complexes, biocatalysts, such as enzymes, photocatalysts, such as titanium dioxide. Surfaces can thus be produced which, for example, have a dirt-reducing effect or which have a biocidal effect.
  • Additives can also be applied which have a catalytic effect on the surface of the coating composition. Different chemical reactions with the interior of the coating material can then take place there.
  • Objects according to this invention are distinguished by the fact that they have a customary coating which has been modified on the surface permanently or long-term with chemical substances. They show a better surface quality according to the selected additive and are inexpensive to manufacture. They contain a predefined amount of additives, which are present in higher concentrations, especially on the surface. Simple and fast production processes are possible, in particular for substrates in the form of strips, sheets or plates.
  • the method according to the invention provides a substrate with a surface coating, the properties of which can be influenced depending on the functional purpose.
  • the person skilled in the art can influence the properties via the selection and amount of the additives. Since the additive is predominantly only on the surface of the coating, the amount of the additive can be reduced compared to the admixture in the entire coating composition.
  • Another advantage of the method according to the invention is that possible problems on the underside of the coating to the substrate, for example disturbed adhesion of the coating, can be avoided by the targeted modification of the surface.
  • a site selectivity, i.e. this method enables additives to be brought to a specific, desired location.
  • AMINA T 100 Degussa
  • the surface is subjected to a test to determine the biofilm reduction.
  • the coated metal sheet is cut into approximately 2.5 x 2.5 cm small plates, sterilized and incubated for 6 hours in 1:20 diluted culture medium, inoculated with P. aeruginosa, at 30 ° C.
  • the metal plates are then dried and colored with Safranin O. Then the safranin O is extracted with DMSO and the absorption of the test sheet at 492 nm is enjoyed. As a result, a 90% reduction based on metal platelets without coating is obtained.
  • AMINA T100 1% by weight of AMINA T100 is homogeneously mixed with the UV-crosslinkable coating agent, which is the maximum amount of AMINA T10O that can be dissolved in the coating agent.
  • the coating agent is applied to the sheet with a layer thickness of 5 ⁇ m and cured analogously to Example 1A.
  • a sheet metal substrate is coated with a UV varnish as in Example 1 and the film with the coated side is applied immediately thereafter.
  • the coating agent is crosslinked as in Example 1 and the film is removed.
  • the contact angle (circle fitting method) is measured and an angle of 120 ⁇ 2 ° is determined.
  • the experiment shows that the additive has penetrated the surface of the coating agent from the film. There it is also firmly attached to the surface against solvents.
  • a determination of the F concentration with XPS measurement shows as a gradient a decrease from an initial value on the surface of 37 F atom% to approx. 10.5 F atom% after approx. 100 nm, approx. 6 F atom% in 1000 nm depth and approx. 1.5 F atom% in 1600 nm.
  • Example 3
  • a sheet is coated analogously to Example 1) and coated with the film.
  • the coating agent is then crosslinked and the film is removed.
  • the surface hardness is determined using a Erichsen Model 318 hardness test rod and a value of 2.3 N is determined.
  • a cross section of the substrate shows a decrease in the Al concentration in the
  • Example 3 A A test according to Example 3 A) is carried out, an uncoated film being placed thereon.
  • the surface hardness is determined.
  • the surface hardness is significantly lower at 1.5 N.
  • a film is mirrored in an inkjet printer
  • a sheet is coated according to Example 1A) and the film with the printed
  • Solvents such as acetone, ethanol and mineral spirits are resistant.
  • An OPP film is charged statically and held over finely powdered heptadecanfluor-1-nonanol powder, the OPP film homogeneously covering itself with a thin layer of the fluoroalcohol.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

La présente invention concerne un procédé pour appliquer un revêtement sur un substrat. Ce procédé consiste à appliquer sur le substrat un agent de revêtement, à mettre l'agent de revêtement non durci ou réticulé en contact avec une feuille, à appliquer des additifs sur la face de la feuille qui fait face au revêtement, ces additifs passant sur le revêtement, puis à faire durcir ou réticuler l'agent de revêtement et enfin à retirer la feuille de la surface de revêtement.
PCT/EP2004/009615 2003-09-08 2004-08-28 Procede de modification de surface de substrats a revetement WO2005028124A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003141670 DE10341670A1 (de) 2003-09-08 2003-09-08 Verfahren zur Oberflächenmodifizierung von beschichteten Substraten
DE10341670.6 2003-09-08

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Publication Number Publication Date
WO2005028124A1 true WO2005028124A1 (fr) 2005-03-31

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PCT/EP2004/009615 WO2005028124A1 (fr) 2003-09-08 2004-08-28 Procede de modification de surface de substrats a revetement

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DE (1) DE10341670A1 (fr)
WO (1) WO2005028124A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
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EP1815915A2 (fr) * 2006-01-18 2007-08-08 Tesa AG Procédé de fabrication de produits en plastique à utilisation polyvalente dotés d'une surface de préférence résistant à l'abrasion
WO2012001510A3 (fr) * 2010-07-02 2012-04-19 Max Canti Procédé et machine permettant d'enrober une surface d'un article
WO2023079488A1 (fr) * 2021-11-05 2023-05-11 Tata Steel Limited Revêtement polymère antimicrobien

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EP1815915A2 (fr) * 2006-01-18 2007-08-08 Tesa AG Procédé de fabrication de produits en plastique à utilisation polyvalente dotés d'une surface de préférence résistant à l'abrasion
EP1815915A3 (fr) * 2006-01-18 2007-10-24 Tesa AG Procédé de fabrication de produits en plastique à utilisation polyvalente dotés d'une surface de préférence résistant à l'abrasion
WO2012001510A3 (fr) * 2010-07-02 2012-04-19 Max Canti Procédé et machine permettant d'enrober une surface d'un article
WO2023079488A1 (fr) * 2021-11-05 2023-05-11 Tata Steel Limited Revêtement polymère antimicrobien

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