WO2013174491A1 - Beschichtungsmittel - Google Patents
Beschichtungsmittel Download PDFInfo
- Publication number
- WO2013174491A1 WO2013174491A1 PCT/EP2013/001444 EP2013001444W WO2013174491A1 WO 2013174491 A1 WO2013174491 A1 WO 2013174491A1 EP 2013001444 W EP2013001444 W EP 2013001444W WO 2013174491 A1 WO2013174491 A1 WO 2013174491A1
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- WO
- WIPO (PCT)
- Prior art keywords
- coating
- silane
- coating agent
- coating composition
- agent
- Prior art date
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Classifications
-
- 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
-
- C—CHEMISTRY; METALLURGY
- 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
-
- 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
- C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of 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; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
- C08J2383/06—Polysiloxanes containing silicon bound to oxygen-containing groups
Definitions
- the invention relates to a coating agent for coating the surface of a molded part and the molded part, which is produced by the process according to the invention.
- the moldings are protected by the coating against external influences, protect them from, for example, corrosion or the damaging effect of UV light, increase the resistance of the molded part surface against mechanical damage or are made for purely optical reasons to improve the appearance of the molded part.
- a coating is applied to the surface for optical reasons and also as protection against the action of UV rays.
- Sill panels, spoilers, tailgates and engine compartment and trunk lid panels, moldings and railings in the roof area, and components in the front window, the radiator and the fuel filler flap, are painted to a large extent to create a visually high-quality appearance, in particular visually and in color the painted components made of sheet metal of the body and also to preserve the plastic from the harmful effects of UV light of the sun.
- the object of the present invention is therefore to specify a coating agent for the coating of the surface of a molded part, which overcomes the above-mentioned disadvantages and has improved adhesion to the surface of the molded part.
- the object of the invention is achieved by a coating agent for coating at least a portion of an activated surface of a molded part which is modified with a compound containing an element of the IVth group of the periodic table which is heavier than carbon.
- the compound is a silane.
- R 1 hydrocarbon chain with up to 10 carbon atoms, where the chain optionally contains nitrogen or oxygen atoms,
- R 2 identical or different hydrolyzable groups
- X is functional group and applies to silane (II)
- R 1 hydrocarbon chain with up to 10 carbon atoms, where the chain optionally contains nitrogen or oxygen atoms,
- R 2 identical or different hydrolyzable groups
- the process for coating at least a portion of the surface of a molding with a coating agent proceeds according to the following process steps:
- active centers are formed on this surface, which are present for example in the case of a plastic molding as -OH groups.
- other active centers are formed, which are present for example as carbonyl groups.
- Such a plasma process may, for example, be carried out in a certain vacuum range by supplying electrical energy in a highly diluted atmosphere of air, oxygen, nitrogen or other gases, e.g. in the low-pressure plasma method.
- Another method of activating the portion of the surface of the molding to be coated is flame treatment to deposit an activating agent.
- a flame such as a propane gas flame burning in an atmosphere of air, a volatile silane, or a compound containing titanium or aluminum, is added.
- the activating agent in the form of SiOx firmly adheres to the surface of the molding.
- the surface of the molded part, in particular of the plastic molded part is also changed in such a way that, in a manner similar to the plasma process, e.g. -OH groups are generated on the surface.
- the SiO x particle on the surface of the molding are also - formed OH groups. It is also possible in another embodiment of the invention to treat the surface of the molding to be coated with the aid of an oxidizing agent in order to activate it.
- a compound containing or releasing a halogen, especially fluorine and / or chlorine, a compound containing or releasing oxygen or a strong acid capable of being active type centers is suitable to form on the surface of the molding.
- the aforesaid means of activating the portion of the surface of the molding to be coated, the plasma process, flame-on deposition of an activating agent and treatment with an oxidizing agent may be carried out individually or in any combination with each other to provide active sites on the surface of the molding form.
- a particularly preferred activation of the surface of the molded part to be coated is to expose it to a plasma treatment process.
- the plasma process can be operated as follows:
- AD plasma As atmospheric pressure plasma (AD plasma or normal pressure plasma) refers to the special case of a plasma, in which the pressure is approximately equal to the surrounding atmosphere - the so-called normal pressure.
- DBE dielectrically impeded discharge
- the plasma nozzle is used industrially for activating and cleaning plastic and metal surfaces before gluing and painting processes.
- web products with treatment widths of several meters can be treated today by juxtaposing many nozzles.
- the modification of the surface achieved by the plasma nozzle can certainly be compared with the effects achieved in the low-pressure plasma.
- the plasma jet can be up to 40 mm long and achieve a treatment width of 15 mm.
- Special rotation systems today allow a treatment width per nozzle of up to 13 cm.
- the plasma source is moved at a distance of 10 to 40 mm at a speed of 5 to 400 m / min relative to the surface of the material to be treated.
- a low-pressure plasma is a plasma in which the pressure is considerably lower than the atmospheric pressure.
- Low-pressure plasmas are among the non-thermal plasmas.
- Typical low-pressure technical plasmas are operated in the pressure range less Pascal, ie at pressures which are lower by a factor of 10,000 than the normal air pressure.
- Typical of low pressure plasmas is a mean free path of the electrons that is larger than the Debye length. In low-pressure plasmas, due to the low pressure, the typical mean free path is so great that impact processes are "rare". Accordingly, the different particle types (heavy particles, electrons) are not in thermal equilibrium, ie have different temperatures.
- a device for treating the surface of components with low-pressure plasma in a filled with process gas having an opening vacuum chamber is known, wherein the opening of the vacuum chamber before evacuation and the introduction and the ionization of the process gas by means of a in the vacuum chamber arranged and connected to a plasma generator electrode is sealed from the part of the component surface to be treated.
- This known method should be used for large-scale components with reasonable investment costs.
- a device moving the component or the vacuum chamber is used, with which a relative movement between the component surface and the opening of the vacuum chamber is carried out until the entire surface to be treated of the component has been subjected to a treatment.
- a plurality of process bells are coupled to the vacuum chamber via flexible feed lines and are used simultaneously to treat the surface of a component or of various components.
- spacers of about 50 cm in length and a T-piece with optional valve-controlled suction of the reaction chamber of the process bell directly through the vacuum pump or indirectly through the vacuum chamber, a plasma activation on polyethylene substrate with air could be detected.
- a process bell was simultaneously used on the opposite surfaces of a relatively thin opaque polyethylene plate for its treatment, air being used as the carrier medium in the reaction chamber of the respective process bell communicating with the vacuum chamber.
- the proof was provided by the optical detectability of the plasma boundary through the thin opaque polyethylene plate and on the other hand by the representation of the changed wettability of the treated surface by a test ink. Similarly, coating, etching and cleaning processes are possible.
- the evacuation can be canceled after completion of the treatment of the corresponding part of the component surface.
- the dimensions of the reaction chamber of the low-pressure plasma reactor with regard to their length, width and height must correspond to the components to be treated.
- the feed pressure in the reaction chamber of the low pressure plasma reactor is selected in the range of 1 Pa to 1000 Pa.
- Another equally preferred technique for activating the surface of the molded article is to flame the surface to deposit an activating agent.
- a silane is added to the fuel gas during the flaming process.
- the silane is hereby preferably selected from the group of organosilanes and silicon hydrides.
- Silanes can z.
- organo-oxysilane such as tetra (m) ethoxysilane, ethyltriethoxysilane,
- Silanes can z.
- the coating composition contains a silane from the group of the general formula (I) and / or the general formula (II).
- the coating composition contains effective amounts of at least one silane of the general formula (I)
- R 1 hydrocarbon chain with up to 10 carbon atoms, where the chain optionally contains nitrogen or oxygen atoms,
- R 2 identical or different hydrolyzable groups
- the content of silanes (I) in the coating compositions according to the invention depends on the content of the other constituents in the coating composition.
- the coating composition may comprise an effective amount of at least one silane of the general formula (II)
- R 3 identical or different C 1 - to C 5 -alkyl groups
- the content of silane (II) in the coating composition according to the invention depends on the content of the other constituents in the coating composition.
- the preparation of the coating composition according to the invention can be carried out in various ways.
- the modification of the coating agent can be effected by adding the modifying silane (I) to a conventional coating agent.
- amounts of 0.05 to 5.0 wt .-%, preferably 0.1 to 3.0 wt .-%, based on the remaining monomers, are used.
- the modification can be carried out by preparation of polymers, which is advantageously carried out so that one prepares from monomers according to the known methods of (radical) polymerization, a starting polymer containing the modification.
- the silanes (II) can be incorporated in a manner known to those skilled in the art.
- silanes II preferably ethylenically unsaturated siloxane-containing monomers, such as those mentioned in the document DE-A 195 37 935, are used.
- the content of this document is referred to in this point.
- the silanes II lead to improved adhesion of the coating composition to various substrates and can be used in amounts of 0.05 to 5.0 wt .-%, preferably 0.1 to 3.0 wt .-%, based on the remaining monomers become.
- a polymer having a functional group such as.
- an OH-functionalized polymer such as acrylate copolymers containing, for example Hydroxyethyl (m) ethyl acrylate, after the polymerization by silanes (I) and / or silane (II) are modified.
- silane (I) for example
- 3-aminopropyltriethoxysilane e.g., trade name DYNASYLAN® AMEO
- N-methyl [3- (trimethoxysilyl) propyl] carbamate e.g., trade name Geniosil GF 60.
- silanes (II) are examples of silanes (II).
- Vinyltrimethoxysilane (eg trade name Geniosil XL 10),
- Y alkylvinyl
- R1 variable
- R2 alkoxy
- R3 alkyl
- m 2 or
- silanes of the general formula (I) and (II) may also be mixed with ingredients of conventional coating agents, such as. B. (iso) cyanate advantageously react.
- Analogous titanium or aluminum compounds can also be used.
- the silane (I) is added to the coating composition and / or the silane (II) is used in the preparation of Position of the binder contained in the coating agent in this polymerized or fixed to this, z. B. by reaction after the polymerization.
- Polymers containing the silane (II) can be prepared in various ways.
- polymers containing the silane (II) by polymerization such.
- Solution polymerization or emulsion polymerization such.
- Polymers can also be modified with silanes of the general formula (I) and (II) after the polymerization.
- Coating agents are prepared in a conventional manner. Depending on the application, application and desired property profile, they contain binders, pigments, fillers, extenders, auxiliaries, additives and optionally other starting materials. The manufacturing process is common.
- Coating agents in liquid form are basically possible on the basis of solvents and water-based.
- the present invention can be applied to both solventborne (solventborne) and waterborne (hydrosol) systems.
- solvent-based coating compositions contain solvents (mixtures) as the liquid phase.
- solvent-based paint system usually contain binders, pigments, fillers, extenders, auxiliaries, additives and optionally other starting materials. They can be made in a variety of ways.
- hydro lacquer systems contain water as the liquid phase.
- hydro lacquer systems usually contain binders, pigments, fillers, extenders, auxiliaries, additives and optionally other starting materials.
- An example of another feedstock may optionally be the addition of small amounts of solvent.
- Reason for this can be in the processing, can also be in the film formation.
- Hydro lacquer systems can be produced in a variety of ways.
- the modification of the coating compositions according to the invention is not limited to those binders which come into contact with the activated surface. These may generally be primers or first coats. Coating agents applied to the primer or first coat as a second coat can also be modified. The intermediate adhesion between the primer or primer coating and the secondary coating is improved, especially when both the coating agent which serves as primer (primer) or first coating, and the coating composition of the second coating is modified according to the invention. Accordingly, in multi-layered structures of the coating system, it is also possible to modify third, fourth and further coatings according to the present invention.
- the intermediate adhesion between the primer or first coat and the second coat will be improved even if the surface has not been activated, especially if both the primer or primer coating composition and the primer are used Coating the second coating is modified according to the invention.
- silane (I) in the activation phase of the plastic surface - in a flame treatment process - and the application of a coating agent containing a binder, optionally pigments, fillers, additives using the modification according to the invention by means of silane (I) and / or silane (II), after Solidification of the coating agent a significant improvement in adhesion properties.
- silane in the activation phase of the plastic surface in the flame treatment or alone the application of a coating agent containing a binder, optionally pigments, fillers, additives using the inventive modification with an organosilicon compound, from hydrolysis produces a silanol.
- silane in the activation phase of the plastic surface and the application of a coating agent containing a binder, optionally pigments, fillers, additives using the modification according to the invention with a silicon-organic compound, from which a silanol is formed by hydrolysis, surprisingly exhibit synergistic effects Solidification of the coating agent.
- Solidification of the coating agent can be adjusted according to logistics, manufacturing equipment, process parameters and other variables required for the application and the desired property profile.
- the coating of plastic parts may be mentioned. After provision of the molding this can be stored under certain conditions for months, in practice, the storage time but should move in the range of minutes to days. After activation of the portion of the surface of the molded part to be coated, it may be stored for a long time under certain conditions prior to coating, but in practice the storage time should be in the range of minutes to days.
- the solidification of the coating agent is carried out.
- the coating of the activated portion of the surface of the molding is possible by various techniques.
- the coating can be carried out by rolling, spraying, dipping, brushing, rolling or other conditions that meet the requirements.
- the solidification of the coating agent on the activated portion of the surface of the molding can be carried out by various techniques.
- solidification may be performed by irradiation, exposure to heat, ventilation to remove vaporizing portions contained in the coating agent, or convection.
- the object of the invention is to provide a modified coating agent for coating at least one activated portion of the surface of a molding, the method - as described above - is applied. As a result, a significant improvement in the adhesion of the coating composition is achieved on the surface of the molding.
- Typical materials or polymers that can be coated with the coating compositions according to the invention after activation are, for example, but not limited to, polyethylene (PE), polypropylene (PP), rubbers, such as styrene-butadiene or natural rubber, polyamides (PA) such as nylon 6,6, polycarbonates (PC), polyesters such as polyethylene terephthalate (PET), as well as mixtures of various polymers such as polypropylene with ethylene-propylene-diene rubber (PP / EPDM), polycarbonate with polyethylene terephthalate (PC / PET ), Polycarbonate with acrylonitrile-butadiene-styrene (PC / ABS), as well as their mixtures and blends.
- PE polyethylene
- PP polypropylene
- PP polypropylene
- PC polycarbonates
- PET polyethylene terephthalate
- PC / EPDM polyethylene terephthalate
- PC / ABS Polycarbonate with acrylonitrile-butadiene
- the device for coating at least a portion of the surface of a molded part has a device for activating the portion of the surface of the molded part to be coated and a device for coating the activated portion of the surface of the molded article with the coating composition of the invention according to the method described above.
- the invention is preferably used in the painting of components for the automotive industry, in particular of exterior attachments to the body of plastic, such as bumper panels, fenders, door and sill panels, spoilers, hatchback and engine compartment and trunk lid panels, moldings and railings in the roof area, as well as components in the area of the windscreen, the radiator and tank flaps.
- components for the automotive industry in particular of exterior attachments to the body of plastic, such as bumper panels, fenders, door and sill panels, spoilers, hatchback and engine compartment and trunk lid panels, moldings and railings in the roof area, as well as components in the area of the windscreen, the radiator and tank flaps.
- Such painted plastic components should have a long shelf life, without it coming from the influence of weather and sunlight to unwanted optical changes or loss of adhesion of the lacquer layer from the plastic substrate.
- the coating composition can be particularly advantageously formulated as a primer or primer or top coat or base coat or clear coat or filler or refinish or replacement parts service paint.
- the invention can also be used in other areas.
- the invention can also be used in the coating of buildings, as well as on metallic bodies and surfaces.
- the invention relates to the following examples.
- the adhesion-modified coating compositions and the other coating compositions used can be based on solvent or based on water.
- the adhesion-modified coating compositions and also the other coating agents used are ready for application in liquid form. They contain binders, pigments, fillers, additives and additives.
- a multi-layer coating structure can be selected.
- the present invention shows that the modification of one or more coating layers, whether it be primer and / or basecoat and / or clearcoat, has better adhesion and improved properties than comparable structures without modification.
- inventive modification of more than one lacquer layer such.
- the present invention shows that the modification of one or both paint layers has better adhesion and improved properties than comparable structures without modification.
- the inventive modification of more than one lacquer layer such. B. the modification of the basecoat according to the invention and the modification according to the invention of the clearcoat not only the adhesion to the substrate, but also the intermediate adhesion is improved.
- the same substrate of polypropylene, filler, pigment, stabilizer, processing aids, copolymer was extruded in a typical composition for auto parts to be painted, and injection molded into 20 cm * 5 cm * 0.3 cm plates.
- the panels produced were fired and then provided with coating agents or subjected to a plasma treatment and then provided with coating agents. activation
- SURA Pyrosil CH Liquid of the company.
- SURA propane as a carrier gas with 240 I min-1 air and 9.5 I min-1 propane with a proportion of 0.6% Pyrosil based on propane gas, with a burner distance of 90 mm (Burner width 200 mm) from the substrate surface, wherein the platelets were pulled through the flame lying on a carriage twice at a speed of 300 mm sec-1.
- Plasma The plasma treatment was in a device PA 2000 from the company. Plasma Technology at 0.1 mbar under oxygen atmosphere for 1 min. performed at 3 kW.
- the platelets were coated with primer, basecoat and clearcoat under the following conditions:
- Primer Wörwag adhesive primer slate gray conductive, in the cloister were sprayed with the gun so that the layer thickness of 12 ⁇ were reached. It was dried for 25 min at 85 ° C and then the basecoat was applied, depending on the examples.
- Basecoat Wörwag basecoat iridium silver DAG T4, in the cloister were sprayed with the gun so that the layer thickness of 15 m was reached. It was dried for 20 min at 75 ° C and then the clearcoat was applied.
- Modified primer 1452 g of the untreated primer Wörwag adhesive primer slate-gray conductive were admixed with 11 g of GF 60 with stirring and prepared for 1 hour with stirring. tet. From the modified primer were sprayed in a cloister with the gun so that the layer thickness of 12 ⁇ was reached. It was dried for 25 min at 85 ° C and then the basecoat was applied, depending on the examples.
- Modified basecoat 1517 g of the untreated Wörwag basecoat iridium silver DAG T4 were mixed with 10 g of GF 60 while stirring and prepared for 1 hour while stirring. From the modified basecoat was sprayed in the cloister with the gun so that the layer thickness of 15 mm was reached. It was dried for 20 min at 75 ° C and then the clearcoat was applied.
- Plasma activation by plasma treatment (see above)
- the coated panels were subjected to the following tests: Steam Jet Test (HDW)
- Test specimen was loaded with specified test parameters (volume flow, temperature, jet length and width, DIN 55662).
- the unit pressure was regulated with the prescribed nozzle so that the specified volume flow was maintained.
- An indication of the test pressure was deliberately omitted, as this is defined by the volume flow and the test nozzle.
- Test nozzle was used according to DBL 5416
- Radiation distribution trapezoidal, no pressure peaks.
- the test duration was 3 cycles. Each cycle consisted of 15 h 105 ° C; 30 min. 23 ⁇ 2 ° C; 8 h - 40 ° C; 30 min. 23 ⁇ 2 ° C, followed by the above-described steam jet test.
- the area to be assessed was cleaned with isopropanol before attachment of the cross-hatch and dried at 23 ⁇ 2 ° C for about 15 min.
- the cross-hatching was carried out with a multi-cutter device, cutting distance 1, 5 mm (regardless of the coating thicknesses) at right angles. The depth of cut was up to the substrate.
- Tesaband type 4657 gray from Beiersdorf Hamburg
- the 19 mm wide Tesaband type 4657 gray was used for the cross-hatch cut with tape tear test. Prior to application of the tape, care was taken to ensure that the scratch marks reaching into the substrate were brushed with an additional suitable article, e.g. Fingernail were smoothed. It was ensured that the Tesaband the entire surface of the painting was applied, was pressed firmly by hand, and was pressed with the fingernail firmly into the scratches and was abruptly, at high speed, torn vertically upwards. When cross-hatching the Tesaband was stuck in accordance with the scratches in the longitudinal and transverse directions and demolished.
- silane in the activation phase of the plastic surface or the sole application of a coating agent containing a binder, optionally pigments, fillers, additives and an organosilicon compound, from which a silanol is formed by hydrolysis, do not lead to the above-indicated adhesion improvement.
- the present invention significantly improves adhesion between primer and basecoat, as well as the adhesion between base coat and clear coat, or more generally the adhesion between adjacent layers in the coating composition.
- 1a and 1b is a schematic cross-sectional view of a molded part with its
- FIGS. 2a and 2b show a schematic cross-sectional view of a molded part with an activated surface
- 3a and 3b show a schematic cross-sectional view of a molded part with an activated surface, wherein a drop of the coating agent approaches the surface; 4a and 4b show a schematic cross-sectional view of the molded part with the surface, wherein the surface is covered with the coating agent;
- 5a and 5b show a schematic cross-sectional view of the molded part with the surface, wherein the surface is covered with the coating agent, wherein a drop of the coating agent approaches the first layer of the coating agent;
- 6a and 6b show a schematic cross-sectional view of the molded part with the surface, wherein the surface is covered with the coating agent, on which a second layer of the coating composition is applied;
- FIG. 7 shows a schematic cross-sectional view of several layers of coating agents.
- FIGS. 1 a and 1b schematically show a molded part 1 in a cross-sectional view, which has a surface 2.
- the index a stands for the activation of the surface by a plasma treatment and the index b for an activation of the surface by a flame on deposition of an activating agent.
- FIGS. 2a and 2b show schematically in a cross-sectional view that after an activation step on the surface 2 of the molded part 1 -OH groups are formed.
- the -OH groups are isolated on the surface 2 of the molded part 1 before.
- Fig. 2b is additionally shown that an SiOx particles 3 is adhered to the surface 2 of the molded part 1.
- the SiOx particle 3 is here formed by flame-treatment with deposition of the SiOx particle serving as the activating agent and deposited on the surface 2 of the molded article 1.
- the SiOx particle 3 has on its surface in turn -OH groups, one of which is shown in FIG. 2b.
- FIGS. 3 a and 3b it is shown that a silane-modified coating agent 4 in the form of a droplet approximates the activated surface 2 of the molded part 1.
- the silane-modified coating agent 4 in a painting z. B. divided by a sputtering technique in the form of drops and has been accelerated in the direction of the activated surface 2 of the molding 1.
- the silane-modified coating agent 4 is in this case moved in the direction of the activated surface 2 of the molded part 1.
- the activated surface 2 of the molded part 1 comprises -OH groups or, as shown in FIG. 3 b, an SiO x particle 3 adhering to the surface 2, which itself Having -OH groups.
- FIGS. 4 a and 4 b show, in a schematic cross-sectional view, that the coating agent 5 has been brought into contact with the surface 2 of the molding 1 and has wetted the surface 2 of the molding 1 and spread on the surface 2.
- silane groups contained in the silane-modified coating agent 4 as shown in FIGS. 3 a and 3b, which are schematically denoted by Si, have, together with the -OH groups formed there through the activation of the surface 2, siloxane bridges characterized as silicon. O, abreacted.
- silane of the coating agent 4 in FIG. 3b has also reacted here with the -OH group of the SiOx particle 3 on the surface 2 of the molded part 1 to form a siloxane bridge, designated Si-O.
- the significantly improved adhesion of the coating agent 5 on the surface 2 of the molded part 1 is achieved.
- FIGS. 5a and 5b show, in a schematic cross-sectional view, that the coating agent 5 is applied to the surface 2 of the molded part 1 as the first layer 6.
- silane-modified coating agent 4 in the form of a droplet approximates the first layer 6.
- the silane-modified coating agent 4 in a painting z. B. divided by a sputtering technique in the form of drops and has been accelerated in the direction of the first layer 6.
- FIGS. 6a and 6b show, in a schematic cross-sectional view, that the coating agent 4 is applied to the surface of the first layer 6 and wets it and has spread on the surface of the first layer 6 and has formed the second layer 7.
- silane groups contained in the silane-modified coating agent 4, as illustrated above in FIGS. 3a and 3b, which are schematically indicated by Si, have with the Si-O groups contained in the first layer 6 siloxane bridges, designated Si-O , abreacted.
- siloxane bridges achieves the significantly improved adhesion of the second layer 7 of the coating agent to the surface of the first layer 6 of the coating agent 5. It is within the scope of the present invention that a further layer according to the above description can also be applied to the second layer 7.
- FIG. 7 it is shown in a schematic cross-sectional view in FIG. 7 that several layers 6, 7, 8 of the coating composition 4 according to the present invention are applied to one another, wherein the second layer 7 is applied to the first layer 6, and the third layer 8 is applied thereon is.
- the invention also includes the possibility that even further layers of the coating agent 4 are arranged below the first layer 6 and / or above the third layer 8, as may occur, for example, in refinishes.
- Siloxane bridges characterized as Si-O, between the layers 6, 7, 8 to a significantly improved adhesion of these layers to one another.
- the subsequent curing or drying step optionally contracts the coating composition in terms of its volume by evaporating solvent and / or water therefrom or by effecting a phase change in another technique which strengthens the coating agent.
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Abstract
Description
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112013002592.2T DE112013002592A5 (de) | 2012-05-21 | 2013-05-16 | Beschichtungsmittel |
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DE102012104357A DE102012104357A1 (de) | 2012-05-21 | 2012-05-21 | Verfahren zur Beschichtung eines Formteils |
DE102012104357.4 | 2012-05-21 | ||
DE202012102438U DE202012102438U1 (de) | 2012-05-21 | 2012-07-03 | Beschichtungsmittel |
DE202012102438.1 | 2012-07-03 |
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PCT/EP2013/001444 WO2013174491A1 (de) | 2012-05-21 | 2013-05-16 | Beschichtungsmittel |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113163921A (zh) * | 2018-10-26 | 2021-07-23 | 海依工业公司 | 用于等离子体指甲表面处理的设备和方法 |
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DE202015106875U1 (de) * | 2015-12-17 | 2017-03-20 | Rehau Ag + Co | Thermoplastische Zusammensetzung |
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DE1771145A1 (de) | 1967-04-11 | 1971-11-25 | Matsushita Electronics Corp | Verfahren zum Herstellen von Siliciumdioxidfilmen |
DE3802043C1 (en) | 1988-01-25 | 1989-07-06 | Espe Stiftung & Co Produktions- Und Vertriebs Kg, 8031 Seefeld, De | Process for preparing a metal surface for bonding to plastic by applying a silicon-containing layer, and use of silicon-containing material |
DE19537935A1 (de) | 1994-10-22 | 1996-04-25 | Basf Ag | Wäßrige Polymerisatdispersionen |
EP0770699A2 (de) * | 1995-10-26 | 1997-05-02 | MERCK PATENT GmbH | Herstellung von wasserabweisenden Beschichtungen auf optischen Substraten |
WO2000020656A1 (en) * | 1998-10-02 | 2000-04-13 | N.K.T. Research Center A/S | A method of metallizing the surface of a solid polymer substrate and the product obtained |
WO2004014989A1 (ja) * | 2002-08-09 | 2004-02-19 | Nakata Coating Co., Ltd. | 立体的装飾体および立体的装飾体の製造方法 |
DE10332921A1 (de) | 2003-07-19 | 2005-03-03 | Eisenlohr, Jörg | Verfahren und Vorrichtung zum Behandeln der Oberfläche von Bauteilen mit Niederdruckplasma |
WO2005021824A2 (en) * | 2003-08-04 | 2005-03-10 | Ciba Specialty Chemicals Holding Inc. | Process for the production of strongly adherent coatings |
EP1985594A1 (de) * | 2007-04-25 | 2008-10-29 | ESK Ceramics GmbH & Co.KG | Formkörper mit einer dauerhaften siliciumnitridhaltigen Hartbeschichtung, Verfahren zu dessen Herstellung und dessen Verwendung |
EP2518102A2 (de) * | 2011-04-29 | 2012-10-31 | Waldorf Technik GmbH & Co. KG | Vorrichtung und Verfahren zur Herstellung von beschichteten Verpackungsformteilen |
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DE102005017459A1 (de) * | 2005-04-15 | 2006-10-19 | Sustech Gmbh & Co. Kg | Verfahren zur Beschichtung harter Werkzeugoberflächen mit fluorhaltigen Copolymeren |
DE102005032618A1 (de) * | 2005-07-13 | 2007-01-25 | Rehau Ag + Co. | Extrudat mit Beschichtung |
DE102006045951A1 (de) * | 2005-09-30 | 2007-04-12 | Sura Instruments Gmbh | Verfahren zur chemischen Modifizierung und/oder Aktivierung von Festkörperoberflächen |
-
2012
- 2012-05-21 DE DE102012104357A patent/DE102012104357A1/de not_active Withdrawn
- 2012-07-03 DE DE202012102438U patent/DE202012102438U1/de not_active Expired - Lifetime
-
2013
- 2013-05-16 WO PCT/EP2013/001445 patent/WO2013174492A1/de active Application Filing
- 2013-05-16 DE DE112013002592.2T patent/DE112013002592A5/de not_active Withdrawn
- 2013-05-16 WO PCT/EP2013/001444 patent/WO2013174491A1/de active Application Filing
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DE1771145A1 (de) | 1967-04-11 | 1971-11-25 | Matsushita Electronics Corp | Verfahren zum Herstellen von Siliciumdioxidfilmen |
DE3802043C1 (en) | 1988-01-25 | 1989-07-06 | Espe Stiftung & Co Produktions- Und Vertriebs Kg, 8031 Seefeld, De | Process for preparing a metal surface for bonding to plastic by applying a silicon-containing layer, and use of silicon-containing material |
DE19537935A1 (de) | 1994-10-22 | 1996-04-25 | Basf Ag | Wäßrige Polymerisatdispersionen |
EP0770699A2 (de) * | 1995-10-26 | 1997-05-02 | MERCK PATENT GmbH | Herstellung von wasserabweisenden Beschichtungen auf optischen Substraten |
WO2000020656A1 (en) * | 1998-10-02 | 2000-04-13 | N.K.T. Research Center A/S | A method of metallizing the surface of a solid polymer substrate and the product obtained |
WO2004014989A1 (ja) * | 2002-08-09 | 2004-02-19 | Nakata Coating Co., Ltd. | 立体的装飾体および立体的装飾体の製造方法 |
DE10332921A1 (de) | 2003-07-19 | 2005-03-03 | Eisenlohr, Jörg | Verfahren und Vorrichtung zum Behandeln der Oberfläche von Bauteilen mit Niederdruckplasma |
WO2005021824A2 (en) * | 2003-08-04 | 2005-03-10 | Ciba Specialty Chemicals Holding Inc. | Process for the production of strongly adherent coatings |
EP1985594A1 (de) * | 2007-04-25 | 2008-10-29 | ESK Ceramics GmbH & Co.KG | Formkörper mit einer dauerhaften siliciumnitridhaltigen Hartbeschichtung, Verfahren zu dessen Herstellung und dessen Verwendung |
EP2518102A2 (de) * | 2011-04-29 | 2012-10-31 | Waldorf Technik GmbH & Co. KG | Vorrichtung und Verfahren zur Herstellung von beschichteten Verpackungsformteilen |
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CN113163921A (zh) * | 2018-10-26 | 2021-07-23 | 海依工业公司 | 用于等离子体指甲表面处理的设备和方法 |
Also Published As
Publication number | Publication date |
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WO2013174492A1 (de) | 2013-11-28 |
DE102012104357A1 (de) | 2013-11-21 |
DE202012102438U1 (de) | 2013-08-22 |
DE112013002592A5 (de) | 2015-03-05 |
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