EP0537726B1 - Procédé pour fabriquer des peintures multicouches, plus particulièrement pour les véhicules automobiles, qui ont une bonne adhérence inter-couche - Google Patents

Procédé pour fabriquer des peintures multicouches, plus particulièrement pour les véhicules automobiles, qui ont une bonne adhérence inter-couche Download PDF

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Publication number
EP0537726B1
EP0537726B1 EP92117597A EP92117597A EP0537726B1 EP 0537726 B1 EP0537726 B1 EP 0537726B1 EP 92117597 A EP92117597 A EP 92117597A EP 92117597 A EP92117597 A EP 92117597A EP 0537726 B1 EP0537726 B1 EP 0537726B1
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EP
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Prior art keywords
process according
groups
resins
layers
lacquer
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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.)
Expired - Lifetime
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EP92117597A
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German (de)
English (en)
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EP0537726A1 (fr
Inventor
Bettina Dr. Vogt
Hans-Peter Dr. Patzschke
Werner Dr. Lenhard
Dietrich Dr. Saatweber
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Axalta Coating Systems Germany GmbH and Co KG
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Herberts GmbH
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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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • 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
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/57—Three layers or more the last layer being a clear coat
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]

Definitions

  • the invention relates to the production of multilayer coatings, in particular in automotive painting, which result in good interlayer adhesion.
  • Multi-layer coatings are well known in the industry. They are used to create a lacquer structure that has different positive properties, but which cannot be produced with a single coating agent. In the automotive industry, for example, two-component primers or electrocoat primers are used to increase the corrosion protection of the metal parts. Filler generally have the task of compensating for unevenness in the substrate and thus delivering a smooth, homogeneous surface over different substrate types. They should also protect the primer from mechanical damage, such as stone chips. The other coatings are generally used for the optical upgrading of the substrate. They are single-layer or multi-layer topcoat coatings, the multi-layer topcoat coatings consisting of a pigmented base layer and a subsequently applied clear lacquer coating.
  • Such multi-layer coatings are described for example in EP-A-89 497.
  • An aqueous anionic binder is applied in a metallic base layer to conventional substrates.
  • a conventional one-component (1K) or two-component (2K) clear coat is applied on top.
  • the individual layers are generally optimized for their specific application.
  • the adhesion of the layers to one another should be as high as possible.
  • Liability is particularly required for mechanical loads, such as stone chipping, of the individual layers of paint.
  • condensation resistance is another problem that is also associated with liability. It has been shown that under different moist storage conditions, moisture can accumulate between individual layers of paint. This leads to delamination or blistering between the layers of paint.
  • adhesion promoters in the coating agents. Depending on the chemical structure, these may later diffuse to the surface and thus promote adhesion of the subsequent lacquer layer.
  • DE-OS 39 32 744 describes how to improve the adhesion by using zirconium aluminate compounds.
  • the use of reactive adhesion promoters is also known. However, these additives have to be tested specifically for each layer and also often have side effects, e.g. Tendency to craters that interfere with good paint build-up.
  • EP-A-0 421 247 describes a process in which two electrochemically depositable lacquer layers are described in order to improve the optical properties.
  • An anionic layer is first deposited (ATL), this is baked and then provided with a cathodic electrocoating (KTL) as the second layer and baked.
  • KTL cathodic electrocoating
  • a coating agent based on an anionic binder is applied to a commercially available KTL as a stone chip protective layer.
  • a commercially available alkyd / melamine topcoat is mentioned as the topcoat.
  • This paint build-up aims to improve stone chip protection in the case of aqueous stone chip protection coatings by using special resins.
  • a conventional solvent-based topcoat is used.
  • the multilayer coating has the usual weaknesses in terms of resistance to condensation. So far, those made of anionic binder systems have always been described as a stone chip protection layer in a multilayer structure.
  • At least 4 alternating polar layers are preferably applied, particularly preferably the entire structure consists of alternating polar layers.
  • the alternating structure is preferably counted starting from the outermost layer of the multi-layer structure.
  • Alternating polarity is to be understood to mean that adjacent coating means or layers have opposite polarities, that is to say they are charged or polarized in opposite directions.
  • Polarity is understood to mean the effective total charge of the resin, which is composed of the sum of the charges and partial charges. This means that the polarity of the layers is essentially determined by the content of polymers with polar groups, for example ionic groups or groups which can be converted into ionic groups and which can be supported by groups with a strong dipole or a high dipole moment.
  • the resins with polar groups are preferably at least some of the customary paint-containing resins, such as the binder resins, hardeners or crosslinkers, paste resins (or grinders) and rheological resins and other possible resinous components or polymers contained in coating compositions.
  • the customary paint-containing resins such as the binder resins, hardeners or crosslinkers, paste resins (or grinders) and rheological resins and other possible resinous components or polymers contained in coating compositions.
  • so-called anionic and cationic coating agents can preferably be used in the process according to the invention.
  • the coating compositions which can be used according to the invention are preferably aqueous-based.
  • the invention is described below primarily on the basis of such examples of coating agents, which, however, are not intended to be limiting.
  • condensation water stability achieved in the process according to the invention is particularly surprising because salt-like conditions have to be assumed in the interfaces of the lacquer layers. However, these just suggest an increased sensitivity to water.
  • anionic coating compositions which can be used according to the invention are coating compositions with paint binders which have anionic groups reacted on the polymer structure or reactive groups which can be converted into anionic groups.
  • cationic coating agents are coating agents with lacquer binders which carry cationic groups reacted on the polymer backbone or substituents which can be converted into cationic groups. According to the invention, not all resins have to contain ionic groups. It is sufficient if only some of the resins used have the ionic groups. Ionic additives or ionic pigments can support the effect according to the invention.
  • anionic groups or groups which can be converted into anionic groups -COOH, -SO3H, -PO2R (OH), -PO3H2 may be mentioned. These groups can be converted into the corresponding anions using organic or inorganic bases. Examples of cationic groups or groups which can be converted into such groups are -NR3+, -NHR, -NH2, -SR2+, where R is, for example, C1 to C8-alkyl. They can be converted into the ionic form by organic or inorganic acids and by alkylation. This ionic Groups are preferably bound to the binder by covalent bonds.
  • components with groups that are strong dipoles or have high dipole moments can also be used.
  • groups are, for example, hydroxyl groups, ether groups, amide groups, urethane groups, urea groups, ester groups, nitrile groups, nitro groups, halogen atoms (e.g. chlorine and fluorine, as contained in the trifluoromethyl group).
  • a coating agent reacted with a cationic group is followed by a coating agent containing anionic groups and then another cationic.
  • a reverse order is also possible; the alternating structure is essential.
  • the procedure can be such that an aqueous corrosion protection primer is electrochemically deposited as the first layer.
  • aqueous corrosion protection primer can carry either anionic groups (ATL) or cationic groups (KTL) in the binder.
  • ATL anionic groups
  • KTL cationic groups
  • aqueous 2-component epoxyamine primers may be mentioned which have neutralized resins (cationic) containing amino groups in the water-dilutable coating composition.
  • an aqueous filler layer is applied to it, for example.
  • a cationic filler layer is applied to an anionic primer and an anionic filler layer to a cationic primer.
  • the subsequent layer can be an aqueous pigmented lacquer, for example an aqueous metallic basecoat.
  • the basecoat is cationic
  • the basecoat is anionic.
  • a clear lacquer coating can be applied as a further subsequent layer become. This has again reacted oppositely charged ionic groups in the binders.
  • An anionic basecoat is followed by a cationic clearcoat, and a cationic basecoat is followed by an anionic clearcoat.
  • Examples of multi-layer structures according to the invention are: A) B) cationic primer anionic primer anionic filler cationic filler cationic basecoat anionic basecoat anionic clear coat cationic clear coat C) D) aqueous cationic 2K primer cationic primer anionic rockfall intermediate anionic filler cationic top coat cationic basecoat anionic powder clearcoat
  • This sequence according to the invention of the ionic groups in the binders used can be achieved by intermediate layers, e.g. additional stone chip intermediate layer or additional barrier layers can be changed to different layer sequences.
  • intermediate layers e.g. additional stone chip intermediate layer or additional barrier layers can be changed to different layer sequences.
  • at least three layers are applied. It is preferred to work in such a way that the alternating structure results from the outermost layer counting inwards.
  • Aqueous coating compositions are preferred for reasons of environmental protection, but it is entirely possible that individual coating compositions are constructed conventionally. In this case, too, however, it is necessary that the binders used have the corresponding ionic groups.
  • Aqueous coating systems are to be understood as coating compositions which are present in physically or colloidally dissolved form or as a dispersion in water. The electrical charge can be on the surface of colloidal or dispersed particles and can be added accordingly charged emulsifiers are generated. Binders with ionic groups are preferred.
  • ionic groups While in aqueous systems part of the ionic groups is generally necessary to convert the binder into a water-dispersible form, smaller proportions of the ionic groups can be present in binders in organic solvents. Some of these ionic groups can optionally be reacted with crosslinking agents in the course of chemical crosslinking of the coating film or they are expelled from the coating film as fission products. It is sufficient if some of the ionic or ionizable groups are still present after the applied coating film has been crosslinked or dried. All polar binder systems described in the literature or familiar to the person skilled in the art or combinations thereof can be used for an alternating layer structure.
  • binders and coating agents examples include: Primers that can be deposited on the cathode (KTL) are described, for example, in EP-A 12 463, DE-OS 27 28 470, EP-A 82 291, EP-A 234 395, US-A 48 08 658, DE-OS 27 28 470, DE-OS 36 15 810, EP-A 261 385, US-A 48 65 704, EP-A 193 685, EP-A 4090, EP-A-52 831, US-A 44 14 753, US-A 44 96 672 and EP-A 259 181.
  • coating compositions which contain binders with reacted cationic groups or groups which can be converted into cationic groups, for example -NH2, -NR2, -NR3+, -SR2+ or -PR3+.
  • Resin bases for this are, for example, acrylic resins, epoxy resins, polyethers, diene polyhydrocarbons, such as butadiene oils, polyurethanes, polyamides or polyester resins.
  • the binders are self-crosslinking or can react via admixed crosslinkers. Blocked isocyanates, melamine resins, phenolic resins, transesterification hardeners, unsaturated compounds or Michael hardeners are described as crosslinkers.
  • the coating compositions can also contain finely divided, crosslinked or non-crosslinked, optionally melting powders with or without ionic groups.
  • anodic electrocoating for example, coating agents and corresponding binders with anionic groups are described in EP-A 21 014, DE-OS 28 24 418, US-A 41 72 822, US-A 42 20 568, DE-OS 27 37 174 , EP-A 106 355, DE-A 27 37 174 or EP-A 21 014.
  • the binder base are polyester resins, epoxy resin esters, polyurethane resins, polyacrylate resins or reaction products of maleic anhydride with unsaturated, natural or synthetic oils, e.g. Butandiene oils.
  • the binders can be self-crosslinking or crosslinking. Carboxyl groups or phosphonium groups, for example, serve as functionalities which can be converted into ionic groups.
  • EP-A-319 841 describes, for example, aqueous 2-component systems as a corrosion protection primer, which consist of a neutralized cationic urethanamine together with epoxy resins.
  • DE-OS 38 05 629 or US 49 68 536 describes, for example, aqueous stone chip protection primers based on anionic binders. Polyacrylates, polyesters and isocyanate systems are mentioned.
  • aqueous fillers with anionic binders are described in EP-A-0 272 525, DE-OS 38 05 629, US-A 49 68 536, EP-A-427 028 and WO 89/00412.
  • Polyacrylates, polyesters, epoxyamine adducts, maleic anhydride / fatty acid reaction products or binders containing polyurethane are described. These are crosslinked with amino resins, phenolic resins or isocyanate derivatives. Common pigments, fillers and paint additives are used.
  • cationic fillers are described in German patent application P 41 34 301.8 by the same applicant on the same priority date. These are coating compositions with conventional pigments, fillers, paint additives and water as a solvent, which contain binders based on polyacrylates, polyurethanes, polyesters or polyurethane-urea resins together with crosslinking agents based on melamine resins or blocked isocyanates. It is about amine-containing binders with a molecular weight between 500 and 200,000, an OH number from 10 to 400, an amine number from 20 to 200 and a Tg between -50 ° and -100 °.
  • the binders crosslink via reactive NH or OH groups with the crosslinking agents. Water solubility is achieved via the neutralizable amino groups.
  • the glass transition temperature (Tg) of the binders influences the elasticity of the binders.
  • the finished coating agents are applied using conventional techniques.
  • Waterborne basecoats based on anionic binders are described, for example, in EP-A 38 127, US-A 44 03 003, US-A 45 39 363, EP-A 71 070, EP-A 195 931, US-A 47 30 020, EP- A 238 108, EP-A-21 414, EP-A 89 497, US-A 44 89 135, US-A 45 58 090, EP-A 228 003, EP-A 256 540 and EP-A 260 444.
  • They can be ionic microgels or non-crosslinked ionic polymers.
  • the coating agents can be physically drying, optionally also contain crosslinking agents or self-crosslinking.
  • polymers of unsaturated monomers such as (meth) acrylic acid derivatives, polyesters, polyethers, polyurethanes or epoxy resin reaction products, are described as the binder base.
  • cationic waterborne basecoats are described in DE patent application 40 11 633. They are binders based on polyurethanes, polyesters, polyurethane-urea resins or polymers of unsaturated monomers such as (meth) acrylic acid derivatives, which do not contain free carboxyl groups, but rather amino groups. Basecoats can be formulated from these binders by adding neutralizing agents as well as pigments, fillers, catalysts and / or additives. The binders can optionally crosslink via known amine formaldehyde resins or blocked isocyanates. These basecoats can be applied using known application techniques.
  • the binders for waterborne basecoats can also be processed into topcoat coatings if the binders are weatherproof. However, it is necessary to choose binder systems that work together can crosslink through a chemical reaction. An additional clear lacquer coating does not have to be applied.
  • water-thinnable clearcoats with anionic groups are described in DE-OS 39 10 829, US-A 50 15 688, DE-OS 25 57 434, US-A 39 53 643, DE-OS 37 12 442 or DE-OS 40 27 594.
  • These are preferably carboxyl-containing polymers based on polyesters, polyacrylates or polyurethanes, which react with known crosslinkers, if appropriate by heating, to give the clearcoat coatings.
  • cationic clearcoats are described in German patent application P 41 34 290.9 by the same applicant on the same priority date. They are based on polymers of unsaturated monomers, e.g. Acrylic resins, formulated.
  • the binders must contain basic groups which are converted into cationic groups.
  • the paint properties can be adjusted via molecular weight, glass transition temperature and the binder viscosities.
  • the binders crosslink via reacted functional groups, e.g. OH groups, with blocked isocyanates or melamine resins as crosslinkers.
  • powder clearcoat binders with ionic groups are mentioned in US Pat. No. 3,787,521, US Pat. No. 4,091,048, DE-OS 24 41 753 or DE-OS 25 09 410.
  • These are, for example, acrylic resins that contain epoxy groups in the side chain. These react when they melt, e.g. with polymers containing polycarboxyl groups or substances containing anhydride groups to form ester structures. It is also possible to use other cross-linking functionalities, for example primary OH groups. Even after crosslinking, parts of polar groups remain in the films, e.g. COOH or OH groups obtained.
  • binders and coating compositions listed by way of example above can contain customary pigments, catalysts or other auxiliaries. They serve to achieve optical or technological effects or influence the application properties.
  • the effect according to the invention is essentially not influenced by the additional components or even reinforced.
  • a preferred embodiment is that powder coatings containing carboxyl groups are used as the clear lacquer coating.
  • the use of cationic water-based clear coats is also preferred.
  • the use of cationic waterborne basecoats in multilayer coating is further preferred.
  • Particularly preferred embodiments are multilayer structures which comprise an aqueous anionic clear lacquer based on acrylic / melamine resin or acrylic / isocyanate, including a cationic water-based lacquer based on aminopolyurethanes or aminoacrylate resins and, under this, an aqueous anionic filler based on polyesters or epoxidized / urethanized alkyd resins.
  • Another example of a structure contains a cationic water-clear lacquer based on amino acrylate resin or aminopolyurethanes, including an anionic water-based lacquer based on acrylated polyester resins and / or polyurethane resins, and below this an aqueous cationic filler based on amino epoxy resin.
  • the coatings produced according to the invention are applied in a known manner. Examples include painting, dipping, electrocoating or spraying.
  • the coating agents are each set to a suitable viscosity and a suitable solid and applied.
  • the individual layers of lacquer are crosslinked in accordance with the state of the art, that is to say it can be crosslinked by elevated temperature if necessary, crosslinking can occur at room temperature, or the lacquer layers are applied wet-on-wet and baked together.
  • the coating agents used can either be physically drying and / or chemically crosslinking. They can be used pigmented or unpigmented. They can be formulated on the basis of 1-component or 2-component systems.
  • the layer thicknesses are preferably ⁇ 40 »m for the primer, ⁇ 130 »M for the filler, ⁇ 25» m for the base coat and ⁇ 100 »m for the clear coat. Additional additional coating layers, for example stone chip protection coatings or adhesive primers, can be applied according to their respective purpose.
  • the properties of the bottom base layer of the multi-layer coating must be matched to the substrate, e.g. by adding adhesion promoters, which have often been shown to be necessary in plastic painting.
  • adhesion promoters which have often been shown to be necessary in plastic painting.
  • binders containing anionic groups are particularly suitable for electrophoretic aluminum coating.
  • the multilayer coatings according to the invention are distinguished by good interlayer adhesion, regardless of their other properties. This is particularly noticeable in stone chip tests, in liability tests (e.g. cross-cut according to DIN 53 151) and in resistance tests in a constant climate (e.g. DIN 50 017).
  • the coating agents are preferably formulated on an aqueous basis.
  • individual layers of paint may be solvent-containing and formulated with a high solids content or to be used as solvent-free systems. In this case too, care must be taken to ensure that at least parts of the resins, e.g. of the binder, reacted polar, optionally ionic groups. If necessary, 2-component coating agents can also be used.
  • the multilayer coatings described are particularly suitable for use in automotive painting or in the coating of the automotive supply industry. However, it is also possible to coat other objects accordingly. All substrates customary in the automotive industry are suitable as substrates; for example metal substrates, e.g. Steel or aluminum, or plastic substrates, e.g. Be polyurethane, polyamide, polycarbonate or polyolefins. You get stone chip-resistant, optically good multi-layer coatings.
  • the product had a stoving residue of 79.8% (1 h 150 ° C.) with a viscosity of 7200 mPas (DIN 53 015), an acid number of 26.3, an OH number of 231 and a color number of 60 Hazen.
  • the product had a stoving residue of 84.0% (1 h 150 ° C) according to DIN 53 182, a viscosity of 15830 mPas (DIN 53 015), an acid number of 38.0 (DIN 53 402), an OH number of 231 (DIN 53 240) and a color number of 60 Hazen (DIN 53 409).
  • the Varnishes are adjusted to processing viscosity with deionized water or solvent and applied using the usual techniques.
  • the primer is deposited electrophoretically, the remaining layers are applied using a spray robot. But these can also be used with other application devices, such as. B. gravity cup gun, pressure vessel or with rotating bells.
  • the layers are then baked as described in Table 1. KTL and filler are baked individually after application, while the base and clear coat are applied wet-on-wet according to the following information:
  • the basecoat is pre-dried for 6 minutes at 80 ° C and then overcoated with approx. 40 »m water clear lacquer. It is pre-gelled at 80 ° C for 15 minutes and then both layers are baked together at 120 ° C for 20 minutes.
  • Table 1 KTL ink pen Basecoat Clear coat Baking temperature 1) 30 '180 ° C 20 ′ 160 ° C 6 '80 ° C 20 ′ 120 ° C Layer thickness 2) 20 + 1 35 + 1 15 + 1 40 + 1 1) in minutes and ° C 2) in »m
  • the technological tests specify the cross-cut (2 mm) according to DIN 53151 and the mechanical stress test with the VDA stone chip tester (1 bar, 1000 g) according to DIN 53230 to characterize the liability.
  • the rating scale ranges from 1 to 6, with 1 characterizing a very good and 6 a very bad adhesive bandage.
  • headlock stress ie evaluation of swelling and regenerability
  • storage in accordance with DIN 50017 is carried out in a constant climate (240 h, 40 ° C).

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)
  • Laminated Bodies (AREA)

Claims (18)

  1. Procédé pour la fabrication de revêtements à plusieurs couches par application de plusieurs couches de produits de revêtement à base de résines organiques successivement sur un support à revêtir, caractérisé en ce que l'on applique au moins trois couches de produits de revêtement directement voisines, une partie au moins des résines de ces trois couches contenant des groupes polaires, la polarité des groupes polaires des résines contenues dans une couche étant identique et les résines des couches directement voisines contenant des groupes polaires à polarité opposée, d'où une structure finale en coude à polarité alternante.
  2. Procédé selon revendication 1, caractérisé en ce que l'on applique au moins quatre couches directement voisines dont les résines ont des polarités alternantes.
  3. Procédé selon revendication 1 ou 2, caractérisé en ce que les couches à polarités alternantes sont comptées à partir de la surface du revêtement final A plusieurs couches.
  4. Procédé selon une des revendications qui précèdent, caractérisé en ce que les couches du revêtement à plusieurs couches ont des polarités alternantes.
  5. Procédé selon une des revendications qui précèdent, caractérisé en ce que les groupes polaires en question sont des groupes ioniques, des groupes convertibles en groupes ioniques et/ou des groupes à fort dipôle.
  6. Procédé selon une des revendications qui précèdent, caractérisé en ce que les résines sont des résines pour liants, des résines durcisseuses, des résines en pâte et/ou des résines rhéologiques.
  7. Procédé selon une des revendications qui précèdent, caractérisé en ce que, dans la structure alternante, on utilise au moins une couche à base d'un produit de revêtement aqueux.
  8. Procédé selon revendication 7, caractérisé en ce que, dans la structure alternante, on utilise des produits de revêtements aqueux dans au moins deux couches.
  9. Procédé selon une des revendications qui précèdent, caractérisé en ce que, dans la structure alternante, on utilise uniquement des produits de revêtements aqueux.
  10. Procédé selon une des revendications qui précèdent, caractérisé en ce que l'on utilise des produits de revêtements aqueux pour toutes les couches.
  11. Procédé selon les revendications 7 à 10, caractérisé en ce que les produits de revêtements aqueux contiennent des résines à groupes ioniques.
  12. Procédé selon une des revendications qui précèdent, caractérisé en ce que les couches voisines à polarité alternante comprennent une couche de peinture de base et, par dessus, une couche de vernis clair, la couche de peinture de base étant, le cas échéant, appliquée sur une couche de mastic.
  13. Procédé selon revendication 11 ou 12, caractérisé en ce que l'on utilise en tant que vernis clair un vernis en poudre.
  14. Procédé selon les revendications 11, 12 ou 13, caractérisé en ce que le vernis clair contient une résine à groupes cationiques.
  15. Procédé selon une des revendications 11 à 13, caractérisé en ce que la peinture de base contient une résine à groupes cationiques.
  16. Procédé selon l'une des revendications 11 à 14, caractérisé en ce que l'on utilise un mastic qui contient une résine à groupes cationiques.
  17. Procédé selon une des revendications qui précèdent, caractérisé en ce qu'on le met en oeuvre pour la peinture de véhicules.
  18. Revêtement à plusieurs couches fabriqué par le procédé selon une des revendications 1 à 17.
EP92117597A 1991-10-17 1992-10-15 Procédé pour fabriquer des peintures multicouches, plus particulièrement pour les véhicules automobiles, qui ont une bonne adhérence inter-couche Expired - Lifetime EP0537726B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4134289A DE4134289A1 (de) 1991-10-17 1991-10-17 Verfahren zur herstellung von mehrschichtueberzuegen, insbesondere bei der kraftfahrzeuglackierung, die eine gute zwischenschichthaftung ergeben
DE4134289 1991-10-17

Publications (2)

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EP0537726A1 EP0537726A1 (fr) 1993-04-21
EP0537726B1 true EP0537726B1 (fr) 1995-07-12

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Country Status (9)

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US (1) US5439710A (fr)
EP (1) EP0537726B1 (fr)
JP (1) JPH05208167A (fr)
KR (1) KR930007520A (fr)
AT (1) ATE124891T1 (fr)
CA (1) CA2080411A1 (fr)
DE (2) DE4134289A1 (fr)
ES (1) ES2077324T3 (fr)
TW (1) TW221453B (fr)

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Publication number Priority date Publication date Assignee Title
DE4215070A1 (de) * 1992-05-07 1993-11-11 Herberts Gmbh Verfahren zur Herstellung von Mehrschichtlackierungen
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TW221453B (fr) 1994-03-01
ES2077324T3 (es) 1995-11-16
JPH05208167A (ja) 1993-08-20
US5439710A (en) 1995-08-08
EP0537726A1 (fr) 1993-04-21
DE59202867D1 (de) 1995-08-17
ATE124891T1 (de) 1995-07-15
KR930007520A (ko) 1993-05-20
DE4134289A1 (de) 1993-04-22

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