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EP0073777B1 - Verbundbeschichtung und verfahren zur herstellung derselben - Google Patents

Verbundbeschichtung und verfahren zur herstellung derselben 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
Authority
EP
European Patent Office
Prior art keywords
layer
coating
thickness
weight
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82900623A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0073777A1 (de
Inventor
Werner Linck
Franzjosef STRÄTER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resicoat Beschichtungspulver GmbH
Rhodius & Co KG Lack- und Farbwerke GmbH
Original Assignee
Resicoat Beschichtungspulver GmbH
Rhodius & Co KG Lack- und Farbwerke GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6127182&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0073777(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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/de
Publication of EP0073777A1 publication Critical patent/EP0073777A1/de
Application granted granted Critical
Publication of EP0073777B1 publication Critical patent/EP0073777B1/de
Expired legal-status Critical Current

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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
    • B05D7/52—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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)
  • Laminated Bodies (AREA)
EP82900623A 1981-03-13 1982-02-12 Verbundbeschichtung und verfahren zur herstellung derselben Expired EP0073777B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82900623T ATE14848T1 (de) 1981-03-13 1982-02-12 Verbundbeschichtung und verfahren zur herstellung derselben.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813109713 DE3109713A1 (de) 1981-03-13 1981-03-13 Verbundbeschichtung und verfahren zur herstellung derselben
DE3109713 1981-03-13

Publications (2)

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

Family

ID=6127182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82900623A Expired EP0073777B1 (de) 1981-03-13 1982-02-12 Verbundbeschichtung und verfahren zur herstellung derselben

Country Status (5)

Country Link
EP (1) EP0073777B1 (it)
JP (1) JPS58500314A (it)
DE (2) DE3109713A1 (it)
IT (1) IT1150231B (it)
WO (1) WO1982003190A1 (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4029985A1 (de) * 1990-09-21 1992-03-26 Bohnacker Tegometall Verfahren zum pulverbeschichten von metalloberflaechen
DE4111544A1 (de) * 1991-04-09 1992-10-15 Worm Hans Gmbh Co Kg Kugelfuehrung

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
FR2206187B3 (it) * 1972-11-09 1976-09-24 Nordisk Aluminium Ind As
JPS534048A (en) * 1975-12-26 1978-01-14 Dainippon Toryo Co Ltd Method of forming multi-layer coating film
DE2800099A1 (de) * 1977-01-10 1978-07-20 Hobart Corp Beschichtetes metallteil
US4213486A (en) * 1978-11-06 1980-07-22 The Kendall Company Coated pipe and process for making same
AT369772B (de) * 1979-02-23 1983-01-25 Voest Alpine Ag Aufbringen von ueberzuegen aus thermoplastischen kunststoffen auf metallische gegenstaende, insbesondere rohre
DE2928323A1 (de) * 1979-07-13 1981-01-29 Rethan Ag Verfahren zum beschichten von aluminiumpaneels mit einem fassadendeckputz

Also Published As

Publication number Publication date
EP0073777A1 (de) 1983-03-16
WO1982003190A1 (en) 1982-09-30
DE3109713A1 (de) 1982-10-21
IT1150231B (it) 1986-12-10
IT8219934A0 (it) 1982-03-03
DE3265329D1 (en) 1985-09-19
JPS58500314A (ja) 1983-03-03

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