EP0073777B1 - Combined coating and preparation method thereof - Google Patents

Combined coating and preparation method thereof Download PDF

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Publication number
EP0073777B1
EP0073777B1 EP82900623A EP82900623A EP0073777B1 EP 0073777 B1 EP0073777 B1 EP 0073777B1 EP 82900623 A EP82900623 A EP 82900623A EP 82900623 A EP82900623 A EP 82900623A EP 0073777 B1 EP0073777 B1 EP 0073777B1
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EP
European Patent Office
Prior art keywords
layer
coating
thickness
weight
water
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EP82900623A
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German (de)
French (fr)
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EP0073777A1 (en
Inventor
Werner Linck
Franzjosef STRÄTER
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Resicoat Beschichtungspulver GmbH
Rhodius & Co KG Lack- und Farbwerke GmbH
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Resicoat Beschichtungspulver GmbH
Rhodius & Co KG Lack- und Farbwerke GmbH
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Application filed by Resicoat Beschichtungspulver GmbH, Rhodius & Co KG Lack- und Farbwerke GmbH filed Critical Resicoat Beschichtungspulver GmbH
Priority to AT82900623T priority Critical patent/ATE14848T1/en
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    • 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
    • B05D7/52—Two layers
    • 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
    • B05D3/12—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 mechanical means
    • 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
    • B05D7/14—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 to metal, e.g. car bodies
    • B05D7/16—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 to metal, e.g. car bodies using synthetic lacquers or varnishes
    • 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
    • B05D2202/00—Metallic substrate
    • 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
    • B05D2451/00—Type of carrier, type of coating (Multilayers)

Definitions

  • the invention is based on a composite coating for substrates made of ferrous or non-ferrous metals according to the preamble of the main claim. It is known to apply a composite coating to a steel pipe by first applying a synthetic resin which cures at the processing temperature with crosslinking, hardening it and then coating it with an adhesive layer, whereupon the pipe is helically wrapped with an extruded plastic band. Such a process, which is naturally quite cumbersome and, moreover, is only suitable for parts with a circular cross section, does not allow a structured surface to be achieved. The coating of large, flat surfaces is not possible with this process, nor can decorative coatings be produced with this process. DE-A No.
  • 2356077 discloses a building front cladding panel which does not generally consist of non-ferrous metals but consists exclusively of an alloyed aluminum and relates to the problems which occur with aluminum with regard to the adhesion of cover layers due to the fact that the aluminum and its alloys are covered with an oxide layer. Accordingly, a 0.01 to 0.7 ⁇ m thick oxide layer must first be produced on the aluminum according to this document. A 0.1 to 10 pm thick thermosetting epoxy lacquer layer is applied to this oxide layer. It is not clear from this publication when the curing is carried out under heat. This could therefore be the case after the topcoat layer has been applied, so it is not surprising that good adhesion is achieved between the barrier layer and the topcoat.
  • This top coat layer consists of an acrylic paint of approx. 20 gm thickness. It is therefore a solvent-thinnable lacquer, but not a structural coating in the sense of the present application, which can still be rolled over with a profile roller after application.
  • the present invention accordingly relates to a composite coating for substrates made of ferrous or non-ferrous metals with a first, thin, anti-corrosion synthetic resin layer and a second, thicker, primarily decorative, layer, characterized in that the first layer is a powder coating layer on epoxy resin and and / or acrylic resin and / or polyester resin base with a thickness of 50 to 500 gm and the second layer is a water-thinnable structural coating based on acrylate, which in addition to the acrylic resin as well as organic color pigments and possibly coarse-grained fillers is 0.01 to 0.5% by weight.
  • % Alkali hydroxide and 1.0 to 5.0 wt .-% of an ester as an organic solvent and has a thickness of 1 to 20 mm.
  • the composite coating according to the invention has the advantage that substrates of any shape can be coated with it without difficulty, and the adhesion of the structural coating to the powder coating layer is surprisingly so good that the parts provided with this composite coating remain completely unchanged even after long weather tests.
  • the powder coating layer primarily takes over the corrosion protection, while the structural coating also takes on a mechanical protective function in addition to a decorative effect that may be desired, since the layer remains elastic and therefore absorbs shocks or other mechanical influences. If necessary, repairs can also be carried out very easily, since the structure coating not only adheres very well to the powder coating layer, but also to the structure coating that has already dried. Due to the consistency of the water-thinnable structure coating, which is honey-like and moreover thixotropic, the material can be applied in a thick layer and then structured accordingly using a profile roller.
  • the present invention also relates to a method for producing a composite coating for substrates made of ferrous or non-ferrous metals by applying a first, thin synthetic resin layer and then applying a second, thicker layer, characterized in that after pretreatment of the substrate, a powder coating layer on epoxy resin and / or acrylic resin and / or polyester resin base is applied in a thickness of 100 to 500 microns and then a water-thinnable structural coating based on acrylate with a content of 0.01 to 0.5 wt .-% alkali hydroxide and 1.0 on the hardened powder coating layer up to 5.0% by weight of an ester as an organic solvent in a thickness of 1 to 20 mm is applied by rolling, spraying, rolling, filling or using a trowel.
  • the process according to the invention has the advantage that the structural coating can be applied to the unpolished powder coating layer, which has not been pretreated in any other way, without the adhesion and long-term weathering tests giving poorer results than if the powder coating layer were previously roughened or pretreated in some other way.
  • This is particularly advantageous where good permanent corrosion protection is important and you do not want to run the risk of grinding the powder coating skin if necessary, thereby worsening the corrosion protection.
  • it is precisely this effect that is surprising, since the experts are otherwise of the opinion that a lacquer layer that usually serves as the final surface is not without prior preparation act as a base for another adhesive coating.
  • FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the following description.
  • the figure shows a section through a substrate provided with the composite coating.
  • a steel sheet 1 is electrostatically coated in a known manner with a powder coating based on polyester resin in such a way that the thickness of the powder coating layer 2 is approximately 50 ⁇ m.
  • the powder coating layer is cured at about 200 ° C. for a few minutes.
  • the water-thinnable structural coating 3 is applied, which consists of acrylic resin, organic color pigments, possibly coarse-grained fillers to produce a stronger structure, and 0.01% by weight of 45% caustic soda and 1.2% by weight diisobutyl ester and finally 0 , 2 wt .-% of a thixotropic additive based on cellulose.
  • the structure coating can be applied by rolling, spraying, rolling, filling or with a trowel.
  • spraying it is advantageous to use a nozzle of approx. 4 mm at a pressure of 3 to 4 bar.
  • the thickness of the layer is 2 to 2.5 mm.
  • the layer is then rolled over with a corresponding profile roll to achieve a coarse structure.
  • the application takes place at approx. 20 ° C.
  • the drying can also take place at this temperature, which takes about 24 hours. If necessary, drying can also take place at 50 to 170 ° C and then only takes 10 or 3 minutes.

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

Description

Die Erfindung geht aus von einer Verbundbeschichtung für Substrate aus Eisen- oder Nichteisenmetallen nach der Gattung des Hauptanspruchs. Es ist bekannt, auf einem Stahlrohr eine Verbundbeschichtung aufzubringen, indem zunächst ein bei Verarbeitungstemperatur unter Vernetzung härtendes Kunstharz aufgetragen wird, dieses gehärtet und anschliessend mit einer Kleberschicht überzogen wird, worauf das Rohr mit einem extrudierten Kunststoffband schraubenlinienförmig umwickelt wird. Ein solches Verfahren, das naturgemäss recht umständlich ist und sich darüber hinaus ausschliesslich für Teile mit einem kreisrunden Querschnitt eignet, gestattet nicht die Erzielung einer strukturierten Oberfläche. Die Beschichtung grosser, ebener Flächen ist nach diesem Verfahren nicht möglich, ebenso lassen sich nach diesem Verfahren keine dekorativen Beschichtungen herstellen. In der DE-A Nr. 2356077 ist eine Baufrontverkleidungsplatte offenbart, die nicht generell aus Nichteisenmetallen, sondern ausschliesslich aus einem legierten Aluminium besteht und sich auf die Probleme bezieht, die beim Aluminium bezüglich der Haftung von Deckschichten dadurch auftreten, dass das Aluminium und seine Legierungen mit einer Oxidschicht abgedeckt sind. Demgemäss muss auf dem Aluminium nach dieser Druckschrift zunächst eine 0,01 bis 0,7 jim dicke Oxidschicht erzeugt werden. Auf diese Oxidschicht wird eine 0,1 bis 10 pm dicke wärmehärtende Epoxidlackschicht aufgebracht. Es geht aus dieser Druckschrift nicht hervor, wann die Aushärtung in der Wärme vorgenommen wird. Dies könnte daher durchaus nach Aufbringen der Decklackschicht der Fall sein, so dass es dann nicht überraschend ist, dass zwischen Sperrschicht und Decklack eine gute Haftung erzielt wird. Diese Decklackschicht besteht aus einem Acryllack von ca. 20 gm Dicke. Es handelt sich hier also um einen lösungsmittelverdünnbaren Lack, jedoch nicht um eine Strukturbeschichtung im Sinne der vorliegenden Anmeldung, die nach dem Aufbringen noch mit einer Profilrolle überrollt werden kann.The invention is based on a composite coating for substrates made of ferrous or non-ferrous metals according to the preamble of the main claim. It is known to apply a composite coating to a steel pipe by first applying a synthetic resin which cures at the processing temperature with crosslinking, hardening it and then coating it with an adhesive layer, whereupon the pipe is helically wrapped with an extruded plastic band. Such a process, which is naturally quite cumbersome and, moreover, is only suitable for parts with a circular cross section, does not allow a structured surface to be achieved. The coating of large, flat surfaces is not possible with this process, nor can decorative coatings be produced with this process. DE-A No. 2356077 discloses a building front cladding panel which does not generally consist of non-ferrous metals but consists exclusively of an alloyed aluminum and relates to the problems which occur with aluminum with regard to the adhesion of cover layers due to the fact that the aluminum and its alloys are covered with an oxide layer. Accordingly, a 0.01 to 0.7 μm thick oxide layer must first be produced on the aluminum according to this document. A 0.1 to 10 pm thick thermosetting epoxy lacquer layer is applied to this oxide layer. It is not clear from this publication when the curing is carried out under heat. This could therefore be the case after the topcoat layer has been applied, so it is not surprising that good adhesion is achieved between the barrier layer and the topcoat. This top coat layer consists of an acrylic paint of approx. 20 gm thickness. It is therefore a solvent-thinnable lacquer, but not a structural coating in the sense of the present application, which can still be rolled over with a profile roller after application.

Es ist Aufgabe der Erfindung, diese Nachteile des Standes der Technik zu vermeiden und eine Verbundbeschichtung mit einer Strukturbeschichtung zu schaffen, die sich nach dem Aufbringen durch eine Profilrolle entsprechend strukturieren lässt, wobei zwischen Strukturbeschichtung und Pulverlackschicht eine gute Haftung erzielt wird.It is an object of the invention to avoid these disadvantages of the prior art and to provide a composite coating with a structural coating which can be structured accordingly after application by means of a profile roller, with good adhesion being achieved between the structural coating and the powder coating layer.

Gegenstand der vorliegenden Erfindung ist demgemäss eine Verbundbeschichtung für Substrate aus Eisen- oder Nichteisenmetallen mit einer ersten, dünnen, dem Korrosionsschutz dienenden Kunstharzschicht und einer zweiten, dickeren, vornehmlich dekorativen Zwecken dienenden Schicht, dadurch gekennzeichnet, dass die erste Schicht eine Pulverlackschicht auf Epoxidharz-und/oder Acrylharz- und/oder Polyesterharzbasis mit einer Dicke von 50 bis 500 gm ist und die zweite Schicht eine wasserverdünnbare Strukturbeschichtung auf Acrylatbasis ist, die neben dem Acrylharz sowie organischen Farbpigmenten und ggf. grobkörnigen Füllstoffen 0,01 bis 0,5 Gew.-% Alkalihydroxid sowie 1,0 bis 5,0 Gew.-% eines Esters als organisches Lösungsmittel enthält und eine Dicke von 1 bis 20 mm aufweist.The present invention accordingly relates to a composite coating for substrates made of ferrous or non-ferrous metals with a first, thin, anti-corrosion synthetic resin layer and a second, thicker, primarily decorative, layer, characterized in that the first layer is a powder coating layer on epoxy resin and and / or acrylic resin and / or polyester resin base with a thickness of 50 to 500 gm and the second layer is a water-thinnable structural coating based on acrylate, which in addition to the acrylic resin as well as organic color pigments and possibly coarse-grained fillers is 0.01 to 0.5% by weight. % Alkali hydroxide and 1.0 to 5.0 wt .-% of an ester as an organic solvent and has a thickness of 1 to 20 mm.

Die erfindungsgemässe Verbundbeschichtung hat den Vorteil, dass sich mit ihr Substrate jeder Form ohne Schwierigkeiten beschichten lassen, wobei die Haftung der Strukturbeschichtung auf der Pulverlackschicht überraschenderweise so gut ist, dass die mit dieser Verbundbeschichtung versehenen Teile auch nach langen Witterungstests völlig unverändert bleiben. Dabei übernimmt die Pulverlackschicht vornehmlich den Korrosionsschutz, während die Strukturbeschichtung ausser einem ggf. gewünschten Dekorationseffekt auch eine mechanische Schutzfunktion übernimmt, da die Schicht elastisch bleibt und daher Stösse oder sonstige mechanische Einwirkungen abfängt. Auch lassen sich, falls notwendig, Reparaturen sehr leicht ausführen, da die Strukturbeschichtung nicht nur auf der Pulverlackschicht sehr gut haftet, sondern auch der bereits getrockneten Strukturbeschichtung. Durch die Konsistenz der wasserverdünnbaren Strukturbeschichtung, die honigartig und darüber hinaus thixotrop ist, lässt sich das Material in dicker Schicht auftragen und anschliessend auch noch durch eine Profilrolle entsprechend strukturieren.The composite coating according to the invention has the advantage that substrates of any shape can be coated with it without difficulty, and the adhesion of the structural coating to the powder coating layer is surprisingly so good that the parts provided with this composite coating remain completely unchanged even after long weather tests. The powder coating layer primarily takes over the corrosion protection, while the structural coating also takes on a mechanical protective function in addition to a decorative effect that may be desired, since the layer remains elastic and therefore absorbs shocks or other mechanical influences. If necessary, repairs can also be carried out very easily, since the structure coating not only adheres very well to the powder coating layer, but also to the structure coating that has already dried. Due to the consistency of the water-thinnable structure coating, which is honey-like and moreover thixotropic, the material can be applied in a thick layer and then structured accordingly using a profile roller.

Gegenstand der vorliegenden Erfindung ist auch ein Verfahren zur Herstellung einer Verbundbeschichtung für Substrate aus Eisen- oder Nichteisenmetallen durch Aufbringen einer ersten, dünnen Kunstharzschicht und anschliessendes Aufbringen einer zweiten, dickeren Schicht, dadurch gekennzeichnet, dass nach Vorbehandlung des Substrates auf dieses eine Pulverlackschicht auf Epoxidharz- und/oder Acrylharz- und/oder Polyesterharzbasis in einer Dicke von 100 bis 500 µrn aufgebracht wird und anschliessend auf die ausgehärtete Pulverlackschicht eine wasserverdünnbare Strukturbeschichtung auf Acrylatbasis mit einem Gehalt an 0,01 bis 0,5 Gew.-% Alkalihydroxid und 1,0 bis 5,0 Gew.-% eines Esters als organisches Lösungsmittel in einer Dicke von 1 bis 20 mm durch Rollen, Spritzen, Walzen, Spachteln oder mittels einer Kelle aufgebracht wird.The present invention also relates to a method for producing a composite coating for substrates made of ferrous or non-ferrous metals by applying a first, thin synthetic resin layer and then applying a second, thicker layer, characterized in that after pretreatment of the substrate, a powder coating layer on epoxy resin and / or acrylic resin and / or polyester resin base is applied in a thickness of 100 to 500 microns and then a water-thinnable structural coating based on acrylate with a content of 0.01 to 0.5 wt .-% alkali hydroxide and 1.0 on the hardened powder coating layer up to 5.0% by weight of an ester as an organic solvent in a thickness of 1 to 20 mm is applied by rolling, spraying, rolling, filling or using a trowel.

Das erfindungsgemässe Verfahren hat den Vorteil, dass die Strukturbeschichtung auf die ungeschliffene und auch sonst in keiner Weise vorbehandelte Pulverlackschicht aufgebracht werden kann, ohne dass die Haftungs- und Langzeitbewitterungstests schlechtere Ergebnisse bringen würden, als wenn die Pulverlackschicht zuvor aufgerauht oder auf andere Weise vorbehandelt wird. Dies ist besonders dort von Vorteil, wo es auf einen guten bleibenden Korrosionsschutz ankommt und man daher nicht das Risiko eingehen will, dass man durch Schleifen ggf. die Pulverlack-Haut zerstört und damit den Korrosionsschutz verschlechtert. Gerade dieser Effekt ist aber überraschend, da die Fachwelt sonst der Meinung ist, dass eine üblicherweise als endgültige Oberfläche dienende Lackschicht nicht ohne entsprechende Vorbehandlung einen Untergrund für eine weitere haftfeste Beschichtung darstellen kann.The process according to the invention has the advantage that the structural coating can be applied to the unpolished powder coating layer, which has not been pretreated in any other way, without the adhesion and long-term weathering tests giving poorer results than if the powder coating layer were previously roughened or pretreated in some other way. This is particularly advantageous where good permanent corrosion protection is important and you do not want to run the risk of grinding the powder coating skin if necessary, thereby worsening the corrosion protection. However, it is precisely this effect that is surprising, since the experts are otherwise of the opinion that a lacquer layer that usually serves as the final surface is not without prior preparation act as a base for another adhesive coating.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Die Figur zeigt einen Schnitt durch ein mit der Verbundbeschichtung versehenes Substrat.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. The figure shows a section through a substrate provided with the composite coating.

Beschreibung des Ausführungsbeispieles Ein Stahlblech 1 wird nach der üblichen Vorbehandlung in bekannter Weise elektrostatisch mit einem Pulverlack auf Polyesterharzbasis beschichtet derart, dass sich eine Dicke der Pulverlackschicht 2 von ca. 50 gm ergibt. Die Pulverlackschicht wird einige Minuten bei etwa 200° C gehärtet. Nach dem Abkühlen wird die wasserverdünnbare Strukturbeschichtung 3 aufgebracht, die aus Acrylharz, organischen Farbpigmenten, ggf. grobkörnigen Füllstoffen zur Erzeugung einer stärkeren Strukturierung sowie 0,01 Gew.-% 45%igem Ätznatron und 1,2 Gew.-% Diisobutylester und schliesslich 0,2 Gew.-% eines Thixotropierungszusatzes auf Cellulosebasis besteht. Das Aufbringen der Strukturbeschichtung kann durch Rollen, Spritzen, Walzen, Spachteln oder mit einer Kelle erfolgen. Beim Auftrag durch Spritzen verwendet man vorteilhaft eine Düse von ca. 4 mm bei einem Druck von 3 bis 4 bar. Die Dicke der Schicht liegt bei 2 bis 2,5 mm. Nach dem Aufbringen wird die Schicht dann zur Erzielung einer Grobstruktur mit einer entsprechenden Profilrolle überollt. Der Auftrag erfolgt bei ca. 20° C. Die Trocknung kann ebenfalls bei dieser Temperatur erfolgen, wozu etwa 24 h notwendig sind. Im Bedarfsfalle kann die Trocknung aber auch bei 50 bis 170° C erfolgen und dauert dann nur 10 bzw. 3 min.DESCRIPTION OF THE EXEMPLARY EMBODIMENT After the usual pretreatment, a steel sheet 1 is electrostatically coated in a known manner with a powder coating based on polyester resin in such a way that the thickness of the powder coating layer 2 is approximately 50 μm. The powder coating layer is cured at about 200 ° C. for a few minutes. After cooling, the water-thinnable structural coating 3 is applied, which consists of acrylic resin, organic color pigments, possibly coarse-grained fillers to produce a stronger structure, and 0.01% by weight of 45% caustic soda and 1.2% by weight diisobutyl ester and finally 0 , 2 wt .-% of a thixotropic additive based on cellulose. The structure coating can be applied by rolling, spraying, rolling, filling or with a trowel. When applying by spraying, it is advantageous to use a nozzle of approx. 4 mm at a pressure of 3 to 4 bar. The thickness of the layer is 2 to 2.5 mm. After application, the layer is then rolled over with a corresponding profile roll to achieve a coarse structure. The application takes place at approx. 20 ° C. The drying can also take place at this temperature, which takes about 24 hours. If necessary, drying can also take place at 50 to 170 ° C and then only takes 10 or 3 minutes.

Claims (4)

1. Laminated coating for substrates of ferrous or non-ferrous metals, comprising a first, thin anticorrosive synthetic resin layer and a second, thicker layer mainly for decorative purposes, characterised in that the first layer is a powder formulation layer based on epoxy resin and/or acrylic resin and/or polyester resin and having a thickness of 50 to 500 µm, and the second layer is a water-dilutable acrylate-based structure-bearing coating which, in addition to the acrylic resin and organic coloured pigments and, if appropriate, coarse- particled fillers, contains 0.01 to 0.5% by weight of an alkali metal hydroxide and 1.0 to 5.0% by weight of an ester as an organic solvent, and has a thickness of 1 to 20 mm.
2. Process for the preparation of a laminated coating for substrates of ferrous or non-ferrous metals by application of a first, thin synthetic resin layer and subsequent application of a second, thicker layer, characterised in that, after the substrate has been pretreated, a powder formulation layer based on epoxy resin and/or acrylic resin and/or polyester resin is applied onto the substrate in a thickness of 100 to 500 [tm, and a water-dilutable acrylate-based structure-bearing coating containing 0.01 to 0.5% by weight of an alkali metal hydroxide and 1.0 to 5.0% by weight of an ester as an organic solvent is then applied onto the hardened powder formulation layer in a thickness of 1 to 20 mm, by roller-coating with a steel or rubber roller or with a roller covered with a soft absorbent material, spraying or knife-coating, or by means of a trowel.
3. Process according to Claim 2, characterised in that the water-dilutable structure-bearing coating is applied onto the powder formulation layer which has not been rubbed or pretreated.
4. Process according to Claim 2, characterised in that, after it has been applied, the water-dilutable structure-bearing coating is rolled over with a profile roller in order to produce a coarse structure.
EP82900623A 1981-03-13 1982-02-12 Combined coating and preparation method thereof Expired EP0073777B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82900623T ATE14848T1 (en) 1981-03-13 1982-02-12 COMPOSITE COATING AND METHOD OF MAKING THE SAME.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813109713 DE3109713A1 (en) 1981-03-13 1981-03-13 COMPOSITE COATING AND METHOD FOR PRODUCING THE SAME
DE3109713 1981-03-13

Publications (2)

Publication Number Publication Date
EP0073777A1 EP0073777A1 (en) 1983-03-16
EP0073777B1 true EP0073777B1 (en) 1985-08-14

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EP (1) EP0073777B1 (en)
JP (1) JPS58500314A (en)
DE (2) DE3109713A1 (en)
IT (1) IT1150231B (en)
WO (1) WO1982003190A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4029985A1 (en) * 1990-09-21 1992-03-26 Bohnacker Tegometall METHOD FOR POWDER COATING METAL SURFACES
DE4111544A1 (en) * 1991-04-09 1992-10-15 Worm Hans Gmbh Co Kg BALL GUIDE

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156580A (en) * 1960-01-29 1964-11-10 Bell Aerospace Corp Method of surface finishing metal surfaces with epoxy and acrylic resins
US3359352A (en) * 1965-06-18 1967-12-19 Congoleum Nairn Inc Process for producing decorative surface covering
DE2356077A1 (en) * 1972-11-09 1974-05-22 Nordisk Aluminium Ind As FRONT CLADDING PANEL AND METHOD FOR MANUFACTURING IT
JPS534048A (en) * 1975-12-26 1978-01-14 Dainippon Toryo Co Ltd Method of forming multi-layer coating film
DE2800099A1 (en) * 1977-01-10 1978-07-20 Hobart Corp COATED METAL PART
US4213486A (en) * 1978-11-06 1980-07-22 The Kendall Company Coated pipe and process for making same
AT369772B (en) * 1979-02-23 1983-01-25 Voest Alpine Ag APPLICATION OF COATINGS FROM THERMOPLASTIC PLASTICS ON METALLIC ITEMS, IN PARTICULAR TUBES
DE2928323A1 (en) * 1979-07-13 1981-01-29 Rethan Ag Coating of aluminium panels with facing plaster - first covering with chromate or paint providing good adhesion for the plaster

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JPS58500314A (en) 1983-03-03
EP0073777A1 (en) 1983-03-16
IT8219934A0 (en) 1982-03-03
WO1982003190A1 (en) 1982-09-30
IT1150231B (en) 1986-12-10
DE3265329D1 (en) 1985-09-19
DE3109713A1 (en) 1982-10-21

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