EP0349749A1 - Utilisation d'un prétraitement au plasma pour augmenter l'adhérence d'une deuxième couche de vernis à appliquer subséquemment - Google Patents

Utilisation d'un prétraitement au plasma pour augmenter l'adhérence d'une deuxième couche de vernis à appliquer subséquemment Download PDF

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Publication number
EP0349749A1
EP0349749A1 EP89109493A EP89109493A EP0349749A1 EP 0349749 A1 EP0349749 A1 EP 0349749A1 EP 89109493 A EP89109493 A EP 89109493A EP 89109493 A EP89109493 A EP 89109493A EP 0349749 A1 EP0349749 A1 EP 0349749A1
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EP
European Patent Office
Prior art keywords
plasma pretreatment
carried out
pretreatment
plasma
adhesion
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.)
Withdrawn
Application number
EP89109493A
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German (de)
English (en)
Inventor
Zdenek Faix
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.)
Audi AG
Original Assignee
Audi AG
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
Application filed by Audi AG filed Critical Audi AG
Publication of EP0349749A1 publication Critical patent/EP0349749A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • B05D3/14—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 electrical means
    • B05D3/141—Plasma treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/14—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 electrical means
    • B05D3/141—Plasma treatment
    • B05D3/142—Pretreatment
    • B05D3/144—Pretreatment of polymeric substrates
    • 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
    • B05D3/14—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 electrical means
    • B05D3/141—Plasma treatment
    • B05D3/145—After-treatment
    • B05D3/148—After-treatment affecting the surface properties of the coating

Definitions

  • the invention relates to the use of a plasma pretreatment to increase the adhesiveness of a second lacquer layer to be applied subsequently.
  • Plasma treatments for producing an adhesive surface have been known for some time. They are used to paint, print, or create a primer for subsequent bonding, especially those made from polyolefin. Such a method is described for example in DE-OS 36 38 719.
  • the plasma treatment can be carried out, for example, in so-called low-pressure plasma.
  • the parts to be treated are placed in a vacuum chamber and exposed to a process gas there.
  • This process gas can be, for example, nitrogen, oxygen or an inert gas.
  • the process gas is exposed to a high-frequency voltage field, which causes the process gas to ionize.
  • the ions and radicals as well as ultraviolet radiation react with the surface of the part to be treated, whereby - depending on the type of process gas used - thin layers are removed or the molecules on the surface of the workpiece are crosslinked. This conversion improves the wettability of the surface, so that the adhesiveness of a layer applied thereon is improved.
  • corona pretreatment of plastics in particular films and molded parts made of plastics
  • a corona spark discharge is generated towards the workpiece by means of an electrode.
  • the resulting plasma is transferred to the surface of the workpiece to be treated and leads to an increase in wettability.
  • the corona treatment Compared to the first-mentioned plasma treatment, the corona treatment has the advantage that no vacuum container is necessary. Corona treatment can therefore be used to treat large workpieces or only areas of them without complex equipment.
  • the treatment is carried out by manually or automatically moving the electrode along the workpiece. The electrode radiates freely, so that a ground-leading counter electrode is not necessary.
  • the invention has for its object to show a new use for such plasma pretreatments.
  • the new use is that the plasma pretreatment is carried out on components which have already been painted and for which the adhesiveness of the paint surface is to be improved for a second coat of paint to be applied subsequently.
  • the known plasma pretreatments are used almost exclusively for the treatment of plastics in order to ensure good adhesion of paints, varnishes, adhesives or foams. In special cases, metal treatment has already been carried out.
  • an adhesion promoter In order to make layers of paint more adhesive for subsequent further painting, grinding or the application of an adhesion promoter is usually carried out. In most cases, grinding is preferred as a proven and economical working method. An adhesion promoter is therefore often only used if the areas to be treated are difficult to access for grinding or if the component to be treated is already installed and would have to be dismantled for grinding. Finally, profiled or grained surfaces cannot be treated by grinding, but only by an adhesion promoter if the surface structure is to be retained.
  • the plasma pretreatment should advantageously be used where grinding is not possible, where the application of the adhesion promoter in the production process is difficult (spraying systems, covering the parts not to be treated), where new coating systems could not previously be used for reasons of economy and where, because of grinding of the workpiece made of elastic material is only possible under difficult conditions.
  • the proposed plasma pretreatment of the painted surface creates oxygen-containing, possibly also nitro-containing, functional groups which make the greatest contribution to the adhesion of a further layer of paint to be applied thereon.
  • a suitable measure for the adhesion is the surface tension. For example, this can be up to 20 mN / m before the plasma treatment. A value of at least 50 mN / m should be achieved for the desired adhesion, which is easily possible with the proposed plasma pretreatment.
  • the pretreatment is preferably carried out by a corona spark discharge in a high-voltage field. This requires voltages of several kilovolts.
  • the treatment distance of the electrode can be up to 20 mm, but shorter distances are preferred.
  • Both movable corona electrodes which are manually guided over the paint surfaces to be treated, and stationary corona electrodes, which act on the painted surface at a precisely defined or programmed distance, can be used. Depending on the intensity of the desired treatment, treatment times of just a few seconds are necessary per unit area. The shortest possible distance between the electrode and the workpiece is advantageous. When using an insulated electrode, a short electrode spacing can be achieved by guiding the electrode along the workpiece surface without complex control.
  • the corona pretreatment does not cause any visible change in the painted workpiece surface. This enables the corona pretreatment to be used particularly advantageously in practice. It is therefore irrelevant if the pretreated area turns out to be larger than the area that is subsequently covered with another layer of lacquer. This procedure would not be justifiable when using an adhesion promoter or even when sanding.
  • the proposed pretreatment can be used with great advantage if only a part of a completely pre-assembled unit has to be repainted. This can be the case, for example, with vehicle bodies. With such parts, it is also possible for the large areas to be treated by grinding or with an adhesion promoter and for the edge areas, that is to say those areas to which other components which are not to be coated with another layer of paint to be connected, are processed by means of corona pretreatment. Both the corona and the other plasma pretreatments enable an adherent substrate for each subsequently applied coating system in a simple manner. The surface tensions of the cross-linked and wet lacquer layers can be very different.
  • the surface of the first painting could be treated with a suitable agent. Apart from the fact that this procedure is very complex, success can only be achieved if the entire body is then washed and dried again, which increases the effort. A partial treatment of these surfaces without subsequent washing and drying of the entire body is excluded because the edge areas cannot be cleaned without residues.
  • plasma pretreatment for components that have already been painted and to which a further layer of paint is subsequently to be applied offers considerable advantages.
  • the proposed use opens up completely new areas of application.
  • plasma pretreatments have been carried out on plastics for some time, they have never been used to treat paint layers in order to increase the adhesiveness of another paint layer.
  • the front right section of a passenger car is shown in perspective, the fender of which is to be repainted due to a work error.
  • the surface area marked with 1 is ground and then the area designated with 2 and adjoining the headlight unit 3 is subjected to a brief manual corona treatment.
  • the desired paint layer can then be applied to the fenders prepared in this way without problems.
  • the great advantage of the procedure described is that components which have already been assembled can be pretreated for painting without removing and without risk of damage to adjacent components.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
EP89109493A 1988-07-02 1989-05-26 Utilisation d'un prétraitement au plasma pour augmenter l'adhérence d'une deuxième couche de vernis à appliquer subséquemment Withdrawn EP0349749A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3822482 1988-07-02
DE19883822482 DE3822482A1 (de) 1988-07-02 1988-07-02 Verwendung einer plasma-vorbehandlung

Publications (1)

Publication Number Publication Date
EP0349749A1 true EP0349749A1 (fr) 1990-01-10

Family

ID=6357855

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109493A Withdrawn EP0349749A1 (fr) 1988-07-02 1989-05-26 Utilisation d'un prétraitement au plasma pour augmenter l'adhérence d'une deuxième couche de vernis à appliquer subséquemment

Country Status (3)

Country Link
EP (1) EP0349749A1 (fr)
DE (1) DE3822482A1 (fr)
WO (1) WO1990000092A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000076748A1 (fr) * 1999-06-09 2000-12-21 Volkswagen Aktiengesellschaft Procede pour l'application de feuilles deformees suivant trois dimensions sur des surfaces complexes
WO2007003490A1 (fr) * 2005-07-06 2007-01-11 Robert Bosch Gmbh Procede de fabrication d'un composant revetu
EP1414589B1 (fr) * 2001-03-24 2007-05-16 Voestalpine Stahl GmbH Revetement resistant a l'abrasion pour substrats enduits
NL2002226C2 (en) * 2008-11-20 2010-05-21 Univ Delft Tech Method for treatment of an adhesive chromium comprising primersurface.
EP3117907A1 (fr) * 2015-07-13 2017-01-18 Matthias Koch Procede de fabrication de substrat revetu, substrat revetu et son utilisation et installations destinees a fabriquer des substrats revetus
FR3127902A1 (fr) * 2021-10-13 2023-04-14 Compagnie Plastic Omnium Se Procédé de personnalisation d’une pièce plastique extérieure de véhicule automobile
FR3127900A1 (fr) * 2021-10-13 2023-04-14 Compagnie Plastic Omnium Se Procédé de personnalisation d’une pièce plastique extérieure de véhicule automobile
US11691176B2 (en) 2016-03-30 2023-07-04 Hec High End Coating Gmbh Method for producing coated metallic substrates and coated metallic substrates

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19507861A1 (de) * 1995-03-08 1996-09-12 Phoenix Ag Verfahren zur Aktivierung von decklackierten Oberflächen von Kunststoff-Verkleidungsteilen
DE10242177A1 (de) * 2002-09-10 2004-03-18 Volkswagen Ag Verfahren zur Beschichtung der Oberfläche eines Substrats
DE10355562A1 (de) * 2003-11-28 2005-06-30 Daimlerchrysler Ag Ganzreparaturprozess durch Verwendung eines Plasmaverfahrens
DE10356823A1 (de) * 2003-12-05 2005-07-07 Bayer Materialscience Ag Verfahren zum Beschichten eines Substrats

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172819A (en) * 1985-03-26 1986-10-01 Honda Motor Co Ltd Pretreatment of polymer surfaces prior to paint coating
DE3638719A1 (de) * 1985-11-14 1987-05-21 Toyoda Gosei Kk Formkoerper, der mittels coronaentladung behandelt ist, sowie verfahren zur behandlung mittels coronaentladung
EP0223998A1 (fr) * 1985-10-23 1987-06-03 Klaus Kalwar Procédé et dispositif d'enduction simple ou multiple de surfaces, particulièrement de la surface intérieure d'un corps creux ouvert en plastique
DE3731526A1 (de) * 1986-09-19 1988-04-07 Toyoda Gosei Kk Weichharz-produkt

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2755189B2 (de) * 1977-12-10 1980-11-27 Detmolder Lackfabrik Niesen & Soehngen, 4930 Detmold Verfahren zur Ausbildung geschlossener und festhaftender Lackschichten aus UV- oder ESH- Lacken auf inhomogenen, insbesondere teilweise bedruckten Substratoberflächen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172819A (en) * 1985-03-26 1986-10-01 Honda Motor Co Ltd Pretreatment of polymer surfaces prior to paint coating
EP0223998A1 (fr) * 1985-10-23 1987-06-03 Klaus Kalwar Procédé et dispositif d'enduction simple ou multiple de surfaces, particulièrement de la surface intérieure d'un corps creux ouvert en plastique
DE3638719A1 (de) * 1985-11-14 1987-05-21 Toyoda Gosei Kk Formkoerper, der mittels coronaentladung behandelt ist, sowie verfahren zur behandlung mittels coronaentladung
DE3731526A1 (de) * 1986-09-19 1988-04-07 Toyoda Gosei Kk Weichharz-produkt

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000076748A1 (fr) * 1999-06-09 2000-12-21 Volkswagen Aktiengesellschaft Procede pour l'application de feuilles deformees suivant trois dimensions sur des surfaces complexes
EP1414589B1 (fr) * 2001-03-24 2007-05-16 Voestalpine Stahl GmbH Revetement resistant a l'abrasion pour substrats enduits
WO2007003490A1 (fr) * 2005-07-06 2007-01-11 Robert Bosch Gmbh Procede de fabrication d'un composant revetu
NL2002226C2 (en) * 2008-11-20 2010-05-21 Univ Delft Tech Method for treatment of an adhesive chromium comprising primersurface.
EP3117907A1 (fr) * 2015-07-13 2017-01-18 Matthias Koch Procede de fabrication de substrat revetu, substrat revetu et son utilisation et installations destinees a fabriquer des substrats revetus
EP3120939A1 (fr) * 2015-07-13 2017-01-25 Matthias Koch Substrat revetu et son utilisation et installations destinees a fabriquer des substrats revetus
WO2017009362A3 (fr) * 2015-07-13 2018-04-26 Hec High End Coating Gmbh Procédé pour produire des substrats revêtus, substrats revêtus et leur utilisation, installations pour produire des substrats revêtus
US20180291499A1 (en) * 2015-07-13 2018-10-11 Hec High End Coating Gmbh Method for manufacturing coated substrates, coated substrates, use thereof, and systems for manufacturing coated substrates
US11691176B2 (en) 2016-03-30 2023-07-04 Hec High End Coating Gmbh Method for producing coated metallic substrates and coated metallic substrates
FR3127902A1 (fr) * 2021-10-13 2023-04-14 Compagnie Plastic Omnium Se Procédé de personnalisation d’une pièce plastique extérieure de véhicule automobile
FR3127900A1 (fr) * 2021-10-13 2023-04-14 Compagnie Plastic Omnium Se Procédé de personnalisation d’une pièce plastique extérieure de véhicule automobile

Also Published As

Publication number Publication date
DE3822482A1 (de) 1990-01-04
WO1990000092A1 (fr) 1990-01-11

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