EP1192013B1 - Verfahren zur reparaturlackierung von fehlstellen in einbrennlackierungen mit pulverlacken - Google Patents
Verfahren zur reparaturlackierung von fehlstellen in einbrennlackierungen mit pulverlacken Download PDFInfo
- Publication number
- EP1192013B1 EP1192013B1 EP00938741A EP00938741A EP1192013B1 EP 1192013 B1 EP1192013 B1 EP 1192013B1 EP 00938741 A EP00938741 A EP 00938741A EP 00938741 A EP00938741 A EP 00938741A EP 1192013 B1 EP1192013 B1 EP 1192013B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- defects
- process according
- powder coating
- nir
- powder
- 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 - Lifetime
Links
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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/005—Repairing damaged coatings
-
- 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
- B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
- B05D2401/30—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant
- B05D2401/32—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant applied as powders
-
- 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
- B05D3/02—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 baking
- B05D3/0254—After-treatment
- B05D3/0263—After-treatment with IR heaters
Definitions
- the invention relates to the refinishing of defects within burned-in Coating layers with powder coating agents.
- a particular problem in the refinishing of outer, visible, from Powder-coated topcoats with liquid coatings are the ones To carry out refinishing in such a way that the repaired area is not noticeable, for example, with regard to color matching or gloss.
- Repair of burned-on powder clearcoat layers is also not essential Deviation between the refractive indices of the baked powder clearcoat and the result in hardened repair clearcoat
- DE-A-38 33 225 and DE-A-197 20 894 Process for repairing defects in lacquer layers while avoiding the usual thermal curing by convection or ordinary IR radiation are known from DE-A-38 33 225 and DE-A-197 20 894.
- the ones described there Processes work with laser light as an energy source for curing the Repair paint.
- DE-A-197 20 946 describes a method for repairing Flaws in an enamel finish, the flaw being ready for repair is coated with a lacquer coating agent and then the applied lacquer by irradiation with a laser beam source in the form of an Nd: YAG laser, the one Near infrared radiation is generated, cured.
- EP-A-0 842 710 describes a method for repairing defects Powder coating layers known, in which prepared for repair, for example a milled or milled defect and a filler is inserted is connected.
- the filler preferably corresponds to the dimensions of the prepared defect.
- EP-A-0 887 118 improves that from EP-A-0 842 710 known methods with regard to the achievable quality of the repaired defect, by carrying out the method known from EP-A-0 842 710 so that the Filler and defect are connected under the influence of pressure.
- EP-A-0 842 710 and EP-A-0 887 118 avoid the disadvantages the repair of imperfections in powder coatings using liquid coatings but still complex due to the necessary provision of the packing, especially in the dimension adapted to the defect to be repaired.
- the object of the invention is, based on DE-A-197 20 894, an improved method for refinishing Flaws in stove enamels, especially when used stoving paint produced by powder coatings to provide the avoids disadvantages of the prior art described.
- the procedure is supposed to be particularly suitable for touch-up painting of series-painted, industrially manufactured objects, in particular motor vehicles and their parts, for example in the context of or following a series painting.
- the invention therefore relates to a method for repairing defects in a stove enamel, which is characterized in that the for Faulty areas ready for refinishing are coated with a clearcoat coating agent and the applied powder coating is then irradiated with near infrared radiation (NIR), which is generated with NIR emitters, melted and cured.
- NIR near infrared radiation
- the one or more defects become within a stove enamelling, especially within one of a Powder coating agent applied stove enamel using a Powder coating agent repainted.
- Stove enamels can be, for example, single-coat top coats or are paint layers arranged within a multilayer paint system, for example primers, filler layers and preferably outer, visible color and / or effect or in particular transparent Topcoats.
- the method according to the invention can preferably be used when repairing defects within burned-in powder coatings, especially powder clearcoats of coated layers. Can be particularly preferred the method according to the invention can be used in the repair of defects within applied to motor vehicles and their parts Baking finishes.
- imperfections means that there are locally limited, for example up to a few square centimeters large, for example 1 mm 2 to 100 cm 2 large, defective areas within stoving lacquers.
- the defects can be, for example, damage such as scratches, for example assembly scratches, coating defects such as craters or dents, or inclusions of dirt.
- Powder coating compositions aqueous preparations of powder coating compositions, include so-called aqueous powder coating slurries. Are preferred in However, the process according to the invention uses powder coatings themselves.
- the powder coatings used as refinish coatings in the process according to the invention contain a thermally curable self or externally cross-linking Binder system, preferably a crosslinking binder / hardener combination.
- the film-forming higher molecular component is one thermosetting powder coating, which is generally at least 50% by weight of the underlying binder / hardener combination, while the Hardener component generally a maximum of 50 wt .-% within this combination is.
- the binder base is not subject to any fundamental restrictions.
- conventional binders used for powder coatings are suitable. Examples are polyester resins, (meth) acrylic copolymers, epoxy resins, phenolic resins, Polyurethane resins, siloxane resins.
- the binders have, for example Glass transition temperatures of 30 to 120 ° C, preferably below 90 ° C, on and have, for example, number-average molar masses (Mn) of 500 to 20,000, preferably less than 10,000.
- the hardeners have e.g. number average molar masses (Mn) from 84 to 3000, preferably less than 2000. Different binders and hardeners can be used be mixed together.
- Binders and hardeners have complementary reactive functionalities Groups that allow a thermal crosslinking reaction of the powder coating, for example by condensation reactions and / or addition reactions.
- functional groups carboxyl groups, epoxy groups are aliphatic or aromatically bound hydroxyl groups, isocyanate groups Isocyanate groups, anhydride groups, primary or secondary amino groups, blocked amino groups, N-heterocyclic groups capable of ring-opening addition Groups such as Oxazoline groups, (meth) acryloyl groups, CH-acidic groups such as e.g. Acetoacetate.
- the selection of the groups which react with one another is familiar to the person skilled in the art. It can optionally combine different reactive groups with each other become. This can be done using binders that are different reactive functional Wear groups, or mixtures of different hardeners and / or Binders used.
- the different functional groups can be on the binder and / or Be harder.
- the binders and hardeners contain on average at least 2 functional groups per molecule.
- the ratio of binder to Hardener is generally, for example, 98: 2 to 50:50. It is preferably between 95: 5 and 70: 30.
- binder / hardener systems customary in powder coatings are polyester resins with low molecular weight epoxy or hydroxyalkylamide hardeners, epoxy / polyester hybrid systems, Epoxy resins with dicyandiamide hardener, carboxylic acid hardeners or phenolic hardeners, hydroxy-functional polyesters or (meth) acrylic copolymers with blocked polyisocyanates, epoxy-functional (meth) acrylic copolymers with Carboxylic acid or carboxylic anhydride hardeners.
- Refinish paints are preferably used in powder clearcoats that are used as binders epoxy-functional (meth) acrylic copolymers, in particular Glycidyl (meth) acrylate copolymers with an epoxy equivalent weight between 250 and 700 and one or more low molecular weight and / or polymeric hardeners Compounds with an average of 2 or more carboxyl functions per molecule and / or anhydrides thereof.
- Solid aliphatic hardeners are preferred Dicarboxylic acids and / or their anhydrides such as in particular dodecanedicarboxylic acid, which can also be used in a mixture with carboxyl-functional polyesters.
- the powder coating materials used in the process according to the invention can be customary Powder coating additives in the usual proportions of, for example, 0.1 to 5% by weight contain.
- additives are leveling agents, degassing agents such as e.g. Benzoin, antioxidants, light stabilizers, matting agents, color and / or effect-giving inorganic and / or organic pigments and / or fillers, Dyes, adhesion promoters, lubricants, catalysts and rheology control agents.
- Powder coatings can be made using the usual methods for producing powder coatings done, for example, by extruding the dry mix of all required components of the formulated powder coating in the form of a pasty Melt, cooling of the melt, coarse comminution, fine grinding and optionally subsequent sieving to the desired fineness, for example to average particle sizes from 10 to 90 ⁇ m.
- the process according to the invention can be carried out using fine-grained Powder coating, for example with average particle sizes of 1 to 40 microns become.
- Fine-grained powder coating or powder coating fine grain can be produced in a targeted manner but falls, for example, in powder coating production or in Powder coating application as an undesirable material per se and can therefore in methods according to the invention can be used sensibly.
- the powder coatings can also be used as an aqueous powder coating slurry.
- a powder coating melt or organic powder coating solution in water be converted into an aqueous powder coating slurry, which if necessary by Organic solvent can be removed by distillation.
- the powder coatings used in the process according to the invention preferably have the same solid composition as that previously used to manufacture the repairing varnish with stoving lacquer layer used. This is preferably a repair of defects in the burned-in area Powder coating layers. Both the initial painting and the Repair coating according to the invention powder coatings with identical Composition used. This is particularly advantageous when repairing Defects in outer, visible, baked clear lacquer layers. For example soft intrinsic color and refractive index of the initial and refinishing paint do not differ from each other.
- imperfections are found in a stove enamelling repaired using powder coatings as refinish.
- the missing parts can be ready for refinishing directly or they will be used Prepared refinish, for example by grinding, milling or Machining the defects with a laser. Generally the flaws at least cleaned before applying the powdered refinish.
- the flawlessly coated surface portions of the surface in front of one To protect contamination for example by covering, masking or by Applying a peeling varnish around the defects to be repaired.
- the defects that are ready for refinishing can be irrespective of whether they are on horizontal or vertical surfaces with the Powder coating agents are coated, for example mechanically, for example by sprinkling, brushing or brushing or application is carried out by spraying with the usual application equipment.
- the mechanical application is particularly suitable for fine-grained powder coating material.
- the spraying can be carried out, for example, with electrostatic assistance, e.g. With With the help of corona or tribo spray organs.
- the powder coating composition applied to the defect is melted and cured by exposure to NIR radiation, preferably high-intensity NIR radiation.
- MR radiation is short-wave infrared radiation in the wavelength range from approximately 760 to approximately 1500 nm, preferably 760 to 1200 nm.
- NIR emitters are commercially available (for example from Industrie SerVis). These are, for example, high-performance halogen lamps with a radiation density of generally more than 1 W / cm 2 , preferably more than 10 W / cm 2 , for example up to 15 MW / m 2 .
- the emitters for example, reach an emitter surface temperature (filament temperature) of between 2000 and 3000 K.
- Suitable emitters for example, have an emission spectrum with a maximum between 750 and 1200 nm.
- the irradiation period in the method according to the invention is, for example, 1 up to 300 seconds. When irradiated, it melts to repair the defect applied powder coating and hardens, for example, within 1 to 300 Seconds, preferably within 5 to 60 seconds.
- the radiation can be equipped with one or more NIR emitters Conveyor system or with a NIR emitter that is in front of the object to be irradiated or the position to be irradiated is carried out.
- the first option is available, for example, for refinishing of individual parts or objects in which several defects are present in one step to be repaired.
- the belt speed and thus the Irradiation time can be varied.
- belt speeds of 1 to 7 m / min can be set, which for example irradiation times from 2 to 20 Seconds.
- the distance between the NIR emitter and Object surface can e.g. 1 to 60 cm, preferably 4 to 20 cm.
- the NIR emitter is placed in front of the object to be irradiated or the position to be irradiated.
- the radiation duration can e.g. 1 to 300 seconds, the object distance e.g. 1 to 60 cm, preferably 4 to 20 cm.
- the different radiation parameters such as belt speed or Irradiation time, object distance, radiation power of the NIR emitter used can by the specialist according to the needs of each Repair task to be adjusted.
- the powder coating applied to repair defects has hardened by means of NIR radiation, it may be expedient to smooth the repaired area, for example by polishing.
- the method according to the invention permits the refinishing of defects in Stove enamels, especially within using Powder coatings produced stove enamels.
- the ones described at the beginning Disadvantages of the prior art can be avoided.
- the procedure is suitable for touch-up painting of mass-produced, industrially manufactured Items, in particular it is suitable for repairing imperfections within generated in the context of automotive or automotive parts series painting Powder coating layers, in particular powder topcoat and powder clearcoat layers.
- the dirt particle is removed by sanding without penetrating the basecoat.
- An approx. 0.5 cm 2 defect in the powder clear coat layer ready for repair is created.
- the area to be repaired is separated from the flawless surface by masking with heat-unstable film.
- the defect that is ready for repair is removed by electrostatic spraying same powder clearcoat applied as that used to produce the first coat powder clearcoat used.
- An NIR emitter from Industrie SerVis is positioned at a distance of 100 mm from the flaw coated with powder clear lacquer. It is irradiated for 8 seconds with a power of 400 kW / m 2 , within which the powder clear lacquer melts and hardens completely.
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Description
Claims (9)
- Verfahren zur Reparatur von Fehlstellen in einer Einbrennlackierung, wobei die zur Reparaturlackierung bereite Fehlstelle mit einem Pulverlacküberzugsmittel oder einer wäßrigen Pulverlackslurry beschichtet wird und der aufgebrachte Pulverlack anschließend durch Bestrahlen mit Nahinfrarot-Strahlung (NIR), die mit NIR-Strahlern erzeugt wird, aufgeschmolzen und ausgehärtet wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß es zur Reparatur von Fehlstellen innerhalb eingebrannter, aus Pulverlacken ersteller Überzugsschichten durchgeführt wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß es zur Reparatur von Fehlstellen innerhalb von auf Kraftfahrzeugen und deren Teilen aufgebrachten Einbrennlackierungen durchgeführt wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß es zur Reparatur von Fehlstellen in äußeren, sichtbaren, eingebrannten Klarlackschichten durchgeführt wird.
- Verfahren nach einem der Anspruche 1 bis 4, dadurch gekennzeichnet, daß die ' Fehlstellen zur Reparaturlackierung vorbereitet werden, insbesondere durch Schleifen, Fräsen, Bearbeitung der Fehlstellen mit einem Laser und/oder Reinigen.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Bestrahlung mit NIR-Strahlung im Wellenlängenbereich von 760 bis 1500 nm erfolgt.
- Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß NIR-Strahler verwendet werden, die zur Anpassung an die zu reparierende Fehlstelle flächig, oder linien- oder punktförmig fokussiert abstrahlen können.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die NIR -Bestrahlung kombiniert mit konventionellen Wärmequellen durchgeführt wird.
- Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß es mit einem Pulverlack oder einer wäßrigen Pulverlackslurry durchgeführt wird, die die gleiche Festkörperzusammensetzung aufweisen, wie der zuvor zur Herstellung der zu reparierenden, Fehlstellen aufweisenden Einbrennlackschicht eingesetzte Lack.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19927041A DE19927041A1 (de) | 1999-06-14 | 1999-06-14 | Verfahren zur Reparaturlackierung von Fehlstellen in Einbrennlackierungen mit Pulverlacken |
DE19927041 | 1999-06-14 | ||
PCT/EP2000/005092 WO2000076678A2 (de) | 1999-06-14 | 2000-06-05 | Verfahren zur reparaturlackierung von fehlstellen in einbrennlackierungen mit pulverlacken |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1192013A2 EP1192013A2 (de) | 2002-04-03 |
EP1192013B1 true EP1192013B1 (de) | 2003-10-01 |
Family
ID=7911158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00938741A Expired - Lifetime EP1192013B1 (de) | 1999-06-14 | 2000-06-05 | Verfahren zur reparaturlackierung von fehlstellen in einbrennlackierungen mit pulverlacken |
Country Status (8)
Country | Link |
---|---|
US (1) | US7018682B1 (de) |
EP (1) | EP1192013B1 (de) |
JP (1) | JP2003501260A (de) |
AT (1) | ATE250985T1 (de) |
AU (1) | AU5401100A (de) |
DE (2) | DE19927041A1 (de) |
ES (1) | ES2203485T3 (de) |
WO (1) | WO2000076678A2 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6280800B1 (en) * | 2000-01-18 | 2001-08-28 | E. I. Du Pont De Nemours And Company | Process for coating metallic substrate surfaces |
US6743466B2 (en) * | 2001-08-03 | 2004-06-01 | E. I. Du Pont De Nemours And Company | Process for repairing coated substrate surfaces |
US20040219385A1 (en) * | 2002-08-23 | 2004-11-04 | Rene Mattern | Process for curing powder coatings |
DE10248943A1 (de) * | 2002-10-21 | 2004-04-29 | Volkswagen Ag | Verfahren zur Reparatur lokal begrenzter Fehlstellen in einer Lackierung |
DE10302486A1 (de) * | 2003-01-23 | 2004-07-29 | Volkswagen Ag | Verfahren zur Herstellung einer Lackierung auf einem Substrat |
US7544386B2 (en) * | 2005-11-18 | 2009-06-09 | Basf Corporation | Method of matching a color in a powder paint system including metallic pigment with a color of a liquid paint system |
EP1854552B1 (de) * | 2006-05-11 | 2008-09-17 | E.I. Du Pont De Nemours And Company | Verfahren zur Reparaturlackierung von Fahrzeugen |
CN102407221B (zh) * | 2011-09-08 | 2014-02-19 | 金发科技股份有限公司 | 一种用聚芳醚酮树脂修补搪瓷釜的方法 |
US10030305B2 (en) * | 2015-11-19 | 2018-07-24 | General Electric Company | Method to protect features during repair cycle |
ES2792083T3 (es) * | 2016-04-01 | 2020-11-10 | Akzo Nobel Coatings Int Bv | Procedimiento para reparar una película de revestimiento, uso de una imprimación adherente en este procedimiento y sustrato con una película de revestimiento reparada |
DE102017125597A1 (de) * | 2017-11-02 | 2019-05-02 | Value & Intellectual Properties Management Gmbh | 3D-Metalldruckverfahren und Anordnung für ein solches |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4218493A (en) | 1977-12-02 | 1980-08-19 | The Continental Group, Inc. | Electrostatic repair coating |
US4960611A (en) * | 1987-09-30 | 1990-10-02 | Kansai Paint Company, Limited | Method of remedying coating |
US5059446A (en) | 1990-02-14 | 1991-10-22 | Armco Inc. | Method of producing plastic coated metal strip |
AU665876B2 (en) * | 1992-12-15 | 1996-01-18 | Nippon Paint Co., Ltd. | Two coat one bake coating method |
JP3666946B2 (ja) | 1995-09-19 | 2005-06-29 | 本田技研工業株式会社 | 塗装補修ライン |
JPH09137089A (ja) * | 1995-11-17 | 1997-05-27 | Kansai Paint Co Ltd | 近赤外光硬化型パテ組成物 |
DE19720945A1 (de) | 1996-05-25 | 1997-11-27 | Volkswagen Ag | Verfahren zur Reparatur lokal begrenzter Lackfilmfehler |
DE19720946A1 (de) | 1996-05-25 | 1997-11-27 | Volkswagen Ag | Vorrichtung und Verfahren zur Reparatur lokal begrenzter Lackfilmfehler |
DE19720894A1 (de) | 1996-05-25 | 1997-11-27 | Volkswagen Ag | Vorrichtung und Verfahren zur Reparatur lokal begrenzter Lackfilmfehler |
DE19635447C1 (de) * | 1996-08-31 | 1997-11-20 | Herberts Gmbh | Verfahren zur Herstellung einer Reparaturlackierung |
DE19646956C1 (de) * | 1996-11-13 | 1998-05-20 | Daimler Benz Ag | Verfahren zur Reparatur kleiner Lackfehler in Lackschichten |
WO1998051748A1 (fr) * | 1997-05-15 | 1998-11-19 | Kansai Paint Co., Ltd. | Peinture pulverulente en granules et son procede de preparation |
DE19727324C1 (de) | 1997-06-27 | 1999-04-01 | Daimler Benz Ag | Verfahren und Vorrichtung zur Reparatur kleiner Lackfehler in Lackschichten |
DE19852268C1 (de) * | 1998-11-13 | 2000-07-13 | Herberts Gmbh | Verfahren zur Härtung von Pulverlacken |
-
1999
- 1999-06-14 DE DE19927041A patent/DE19927041A1/de not_active Withdrawn
-
2000
- 2000-06-05 JP JP2001502994A patent/JP2003501260A/ja active Pending
- 2000-06-05 WO PCT/EP2000/005092 patent/WO2000076678A2/de active IP Right Grant
- 2000-06-05 AT AT00938741T patent/ATE250985T1/de not_active IP Right Cessation
- 2000-06-05 DE DE50003913T patent/DE50003913D1/de not_active Expired - Fee Related
- 2000-06-05 AU AU54011/00A patent/AU5401100A/en not_active Abandoned
- 2000-06-05 EP EP00938741A patent/EP1192013B1/de not_active Expired - Lifetime
- 2000-06-05 ES ES00938741T patent/ES2203485T3/es not_active Expired - Lifetime
- 2000-06-05 US US10/018,896 patent/US7018682B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2003501260A (ja) | 2003-01-14 |
ES2203485T3 (es) | 2004-04-16 |
AU5401100A (en) | 2001-01-02 |
EP1192013A2 (de) | 2002-04-03 |
DE50003913D1 (de) | 2003-11-06 |
ATE250985T1 (de) | 2003-10-15 |
US7018682B1 (en) | 2006-03-28 |
WO2000076678A2 (de) | 2000-12-21 |
WO2000076678A3 (de) | 2001-08-02 |
DE19927041A1 (de) | 2000-12-21 |
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