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WO2003000432A2 - Procede pour appliquer une peinture de reparation ou une deuxieme couche de peinture sur des revetements produits a partir de materiaux de revetement durcissables par voie thermique et par exposition a un rayonnement actinique - Google Patents

Procede pour appliquer une peinture de reparation ou une deuxieme couche de peinture sur des revetements produits a partir de materiaux de revetement durcissables par voie thermique et par exposition a un rayonnement actinique Download PDF

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Publication number
WO2003000432A2
WO2003000432A2 PCT/EP2002/006699 EP0206699W WO03000432A2 WO 2003000432 A2 WO2003000432 A2 WO 2003000432A2 EP 0206699 W EP0206699 W EP 0206699W WO 03000432 A2 WO03000432 A2 WO 03000432A2
Authority
WO
WIPO (PCT)
Prior art keywords
coating
actinic radiation
coating material
coating materials
coatings
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.)
Ceased
Application number
PCT/EP2002/006699
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German (de)
English (en)
Other versions
WO2003000432A3 (fr
Inventor
Hubert Baumgart
Heinrich Wonnemann
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.)
BASF Coatings GmbH
Original Assignee
BASF Coatings 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
Application filed by BASF Coatings GmbH filed Critical BASF Coatings GmbH
Priority to AU2002345057A priority Critical patent/AU2002345057A1/en
Publication of WO2003000432A2 publication Critical patent/WO2003000432A2/fr
Anticipated expiration legal-status Critical
Publication of WO2003000432A3 publication Critical patent/WO2003000432A3/fr
Ceased 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
    • B05D7/53—Base coat plus clear coat type
    • B05D7/536—Base coat plus clear coat type each layer being cured, at least partially, separately
    • 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
    • B05D3/0209—Multistage baking
    • 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
    • B05D7/576—Three layers or more the last layer being a clear coat each layer being cured, at least partially, separately
    • 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
    • B05D7/577—Three layers or more the last layer being a clear coat some layers being coated "wet-on-wet", the others not
    • 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

Definitions

  • the present invention relates to a new process for refinishing or double coating of coatings, produced from coating materials curable thermally and with actinic radiation.
  • the present invention relates to the new coatings which can be produced with the aid of the new process for refinishing or double coating.
  • Motor vehicle bodies, in particular car bodies, today preferably consist of several layers of paint which are applied one above the other and have different properties.
  • an electrically deposited electrodeposition coating as a primer, a filler coating or stone chip protection primer, a base coat and a clear coat are applied to a substrate in succession.
  • the ETL serves in particular to protect the sheet against corrosion. It is often referred to by experts as a primer.
  • the filler coating is used to cover unevenness in the surface and, due to its elasticity, ensures resistance to stone chips. If necessary, the filler coating can also serve to increase the hiding power and to deepen the color of the coating.
  • the base coat contributes the colors and / or the optical effects.
  • the clear coat serves to enhance the optical effects and to protect the paint from mechanical and chemical damage. Basecoat and clearcoat are also common collectively referred to as top coat.
  • the clear coats in particular have been produced from clear coats which are curable thermally and with actinic radiation.
  • Actinic radiation is to be understood here and below as electromagnetic radiation, such as near infrared, visible light, UV radiation or X-rays, in particular UV radiation, and corpuscular radiation, such as electron beams.
  • electromagnetic radiation such as near infrared, visible light, UV radiation or X-rays, in particular UV radiation, and corpuscular radiation, such as electron beams.
  • corpuscular radiation such as electron beams.
  • the combined hardening by heat and actinic radiation is also called dual-cure by experts.
  • Dual-cure coating materials in particular dual-cure clearcoats, have the significant advantage that they can also be used in the shadow zones of complexly shaped three-dimensional substrates, such as car bodies, radiators or electrical winding goods, even without optimal, in particular complete, illumination of the shadow zones with actinic Radiation supplies coatings whose application properties profile at least approximates that of the coatings outside the shadow zones. As a result, the coatings located in the shadow zones are no longer easily damaged by mechanical and / or chemical action, which for example in the line when installing further components of motor vehicles in the coated bodies.
  • curing with actinic radiation can compensate for incomplete thermal curing if, for example, the dual-cure coating materials, because of the temperature sensitivity of the coated substrates, must not be heated to the temperatures necessary for the rapid course of the thermal crosslinking reactions.
  • Dual-cure coating materials and their use for producing high-quality color and / or effect multi-layer coatings are known, for example, from German patent applications DE 42 15 070 A1, DE 198 18 735 A1, DE 199 08 018 A1, DE 199 30 665 A. 1, DE 199 30 067 A1, DE 199 30 664 A1, DE 199 24 674 A1, DE 199 20 799 A1, 199 58 726 A1 or DE 199 61 926 A1 or are known from the previously unpublished German Patent applications DE 100 42 152.0, DE 100 47 989.8 or DE 100 55 549.7 are described.
  • the refinishing or double lacquering of these high-quality color and / or effect multi-layer lacquers places the highest demands on the refinish coatings and the refinishing processes. This is particularly the case for the refinishing of painted bodies in the line, in which the original or initial painting (OEM) has to be painted over a large area or as a whole (double painting).
  • OEM original or initial painting
  • the colors and / or the optical effects in the refinish should not differ from those of the first coat.
  • the refinish paint must adhere firmly to the original paint. If, however, the original paintwork is produced using the technologically particularly advantageous dual-cure clearcoats, liability problems arise which are due to the particularly high crosslinking density of the radiation-hardened systems.
  • the object of the present invention is to find a new process which is used for the refinishing or double coating of coatings which have been produced from coating materials curable thermally and with actinic radiation.
  • the new process of refinishing or double coating of clear coats and solid-color coats, which were produced from coating materials curable thermally and with actinic radiation, and from multi-layer coatings which give color and / or effect, wherein at least the clear coats were produced from coating materials curable thermally and with actinic radiation serve.
  • the new method should no longer have the disadvantages of the prior art described, but should allow the above-mentioned coatings to be provided with a refinish or double coating over a large area or overall without any physical, mechanical or chemical pretreatment and / or Flaming the surface of the clear covers is necessary to avoid liability problems.
  • At least one coating material (2) curable thermally and with actinic radiation is applied to a primed or unprimed substrate or at least one uncured, partially cured or fully cured layer of a coating material (1),
  • the new process for refinishing or double-coating a coating which was produced from at least one coating material which is curable thermally and with actinic radiation is referred to as the process according to the invention.
  • the object underlying the invention could be achieved with the aid of the method according to the invention.
  • the measure essential to the invention initially hardened the coating (2) to be repaired or double-coated only with actinic radiation, in order to then heat treat it with the repair or double coating (3) hardened with actinic radiation undergo a significant improvement in interlayer adhesion. It was even more surprising that this measure could be applied to pigmented and unpigmented coatings (2) and (3).
  • the method according to the invention is used above all in automotive painting for large-area refinishing or double painting of bodies and parts thereof. However, it is not limited to this, but can just as well be used for the large-scale refinishing or double painting of structures indoors and outdoors, of furniture, doors and windows and as part of the industrial painting of coils, containers, packaging or white goods, such as radiators, Household appliances, refrigerator panels or washing machine panels are used.
  • the method according to the invention is therefore based on primed or unprimed substrates made of metal, plastic, glass, wood, textile, leather, natural and artificial stone, concrete, cement or composites of these materials, as are usually used in the technical fields mentioned above, where the electrically conductive substrates are preferred.
  • the substrates can be primed.
  • customary and known primer layers or adhesive layers can be used as primers, or the plastic surfaces can be provided with reactive compounds such as fluorine by flame treatment or etching.
  • primers can be used as primers, as are found in Römpp Lexikon Lacke und Druckmaschine, Georg Thieme Verlag, Stuttgart, New York, 1998, "Primer”, page 473, “Wash Primer”, page 618 , or "Production Coating", page 230.
  • an aluminum oxide layer produced by anodic oxidation is preferably used as the primer.
  • At least one, in particular one, dual-cure coating material (2) is applied to the above-described primed or unprimed substrate or to an uncured, partially cured or fully cured layer of a coating material already located thereon (1) applied, whereby at least one, in particular one, layer (2) results.
  • the coating materials (1) can be pigmented or unpigmented. They are preferably pigmented.
  • the coating materials (1) can be conventional coating materials containing organic solvents, aqueous coating materials, essentially or completely solvent-free and water-free liquid coating materials (100% systems), essentially or completely solvent-free and water-free solid coating materials (powder coatings) or essentially or be completely solvent-free powder coating suspensions (powder slurries).
  • they can be single-component systems in which the binders and the crosslinking agents are present side by side, or two- or multicomponent systems in which the binders and the crosslinking agents are stored separately until shortly before application because of their high reactivity.
  • the coating materials (1) are preferably electrocoat materials, fillers and / or basecoats.
  • Basecoat layers (1) can be cured separately before application of the coating materials (2) or - if there are at least two layers (1) - also cured together (wet-on-wet process).
  • the electrocoat layers, filler layers and / or basecoat layers (1) can be unhardened or partially hardened and can only be hardened (wet-in) with layers (2) and / or (3) and optionally (4) in the further course of the process according to the invention - wet process).
  • Suitable fillers (1) in particular aqueous fillers, which are also referred to as stone chip protection primers or functional layers, are known from the patents and applications US 4,537,926 A1, EP 0529335 A1, EP 0595186 A1, EP 0639660 A1, DE 4438504 A 1, DE 43 37 961 A 1, WO 89, / 10387, US 4,450,200 A 1, US 4,614,683 A 1 or WO 490/26827 are known.
  • Suitable basecoats (1) are known from patent applications EP 0 089 497 A1, EP 0 256 540 A1, EP 0 260 447 A1, EP 0 297 576 A1, WO 96/12747, EP 0 523 610 A 1, EP 0 228 003 A 1, EP 0 397 806 A 1, EP 0 574 417 A 1, EP 0 531 510 A 1, EP 0 581 211 A 1, EP 0 708 788 A 1, EP 0 593 454 A 1, DE-A-43 28 092 A1, EP 0 299 148 A1, EP 0 394 737 A1, EP 0 590 484 A1, EP 0 234 362 A1, EP 0 234 361 A1, EP 0 543 817 A 1, WO 95/14721, EP 0 521 928 A 1, EP 0 522 420 A 1, EP 0 522 419 A 1, EP 0 649 865 A 1, EP 0 536 712 A 1, EP
  • the application of the coating materials (1) and dual-cure coating materials (2) to be used in the process according to the invention has no peculiarities, but can be done by all customary and known application methods suitable for the respective coating material, such as, for example, electrocoating, spraying, spraying, Squeegee, brush, pour, dip, trickle or roll.
  • Spray application methods are preferably used, such as compressed air spraying, airless spraying, high rotation, electrostatic spray application (ESTA), optionally combined with hot spray application such as hot air hot spraying, unless it is powder coatings (1) or (2) or electrodeposition paints (1).
  • powder coatings (1) or (2) has no special features in terms of method, but is carried out, for example, using the customary and known fluidized bed processes, such as those found in the company publications of BASF Coatings AG, "Powder coatings for industrial applications", January 2000, or “Coatings Partner, Pulverlack Spezial", 1/2000, or Römpp Lexikon Lacke und Druckmaschine, Georg Thieme Verlag, Stuttgart, New York, 1998, pages 187 and 188, "Electrostatic Powder Spraying”, “Electrostatic Spraying” and “Electrostatic Whirl Bath Process", are known.
  • composition of the dual-cure coating materials (2) to be used according to the invention is not critical, but all coating materials that can be cured thermally and with actinic radiation can be used.
  • the dual-cure coating materials (2) can also be conventional coating materials containing organic solvents, aqueous coating materials, essentially or completely solvent-free and water-free liquid coating materials (100% systems), substantially or completely solvent-free and water-free solid coating materials (powder coatings ) or essentially or completely solvent-free powder coating suspensions (powder slurries).
  • they can be one-component systems in which the binders and the crosslinking agents are present side by side, or two- or multi-component systems in which the binders and the Crosslinking agents should be stored separately until shortly before application because of their high reactivity.
  • the dual-cure coating materials (2) can be pigmented. It is then preferably a dual-cure filler, a dual-cure basecoat or a dual-cure solid-color topcoat (2).
  • Dual-cure coating materials (2) can be unpigmented. It is then preferably dual-cure clearcoats (2).
  • Examples of suitable dual-cure coating materials (2) are from German patent applications DE 42 15 070 A1, DE 198 18 735 A1, DE 199 08 018 A1, DE 199 30 665 A1, DE 199 30 067 A1, DE 199 30 664 A 1, DE 199 24 674 A 1, DE 199 20 799 A 1, 199 58 726 A 1 or DE 199 61 926 A 1 or the European patent application EP 0 928 800 A 1 or are known in the unpublished German Patent applications DE 100 42 152.0, DE 100 47 989.8 or DE 100 55 549.7 are described.
  • the dual-cure coating materials can also be obtained, inter alia, by adding to the fillers (1) or basecoats (1) described above or to clearcoats such as those found in patent applications, patent specifications and publications DE 42 04 518 A1, EP 0 594 068 A 1, EP 0 594 071 A 1, EP 0 594 142 A 1, EP 0 604 992 A 1, EP 0 596 460 A 1, WO 94/10211, WO 94/10212, WO 94/10213, WO 94 / 22969 or WO 92/22615, US 5,474,811 A 1, US 5,356,669 A 1 or US 5,605,965 A 1, DE 42 22 194 A 1, product information from BASF Lacke + Maschinen AG, "Powder Coatings", 1990, company name of BASF Coatings AG "Powder coatings, powder coatings for industrial applications", January 2000, US 4,268,542 A 1, DE 195 40 977 A 1, DE 195 18 392 A 1, DE 196 17 086 A 1, DE-A-
  • the resulting layer (2) is cured with actinic radiation in process step (II).
  • the curing of the dual-cure coating materials (2) used in the process according to the invention generally takes place after a certain resting time or flash-off time. It can have a duration of 5 s to 2 h, preferably 1 min to 1 h and in particular 1 to 45 min.
  • the rest period is used, for example, for the course and degassing of the paint layers and for the evaporation of volatile constituents such as any solvent and / or water present.
  • the ventilation can be accelerated by an increased temperature, which is not yet sufficient for hardening, and / or by a reduced air humidity.
  • this method measure is also used for drying the applied lacquer layers (1) and / or (4) which are not to be hardened or only partially hardened.
  • a dose of 500 to 4,000, preferably 1,000 to 2,900, particularly preferably 1,200 to 2,800, very particularly preferably 1,300 to 2,700 and in particular 1,400 to 2,600 mJ / cm 2 is preferably used.
  • the usual and known radiation sources and optical auxiliary measures are used for curing with actinic radiation.
  • suitable radiation sources are flash lamps from VISIT, high-pressure or low-pressure mercury vapor lamps, which, if appropriate are doped with lead to open a beam window up to 405 nm, or electron beam sources.
  • Their arrangement is known in principle and can be adapted to the conditions of the workpiece and the process parameters.
  • shadow areas such as cavities, folds and other design-related undercuts
  • the curing can take place in stages, i. H. by multiple exposure or exposure to actinic radiation. This can also take place alternately, i. that is, for example, alternately curing with UV radiation and electron radiation.
  • Curing with actinic radiation is preferably carried out under inert gas in order to avoid the formation of ozone.
  • process step (III) at least one, in particular one, dual-cure coating material (3) is applied to the coating (s) (2) resulting in process step (II), after which the resulting layer (s)) ( 3) cures with actinic radiation.
  • dual-cure coating materials (2) applied are the Methods described above in the dual-cure coating materials (2) applied.
  • dual-cure coating materials (3) are suitable as dual-cure coating materials (3).
  • the dual-cure coating materials (3) and (2) can have different material compositions. They preferably have an identical or almost identical composition in order to have the same or essentially the same application properties.
  • the dual-cure coating materials (3) can be pigmented. It is then preferably a dual-cure filler and / or solid-color topcoat (3).
  • the dual-cure coating materials (3) can also not be pigmented. It is then preferably dual-cure clearcoats (3).
  • At least one layer of at least one coating material (4) is applied to the coating (s) (2) before the dual-cure coating materials (3) are applied, the methods described above being used.
  • This variant is preferably used if the coating (s) (2) are not pigmented and in particular are clear coatings (2).
  • the coating (s) (2) are on pigmented layers (1), located or located in particular on filler paints and / or basecoats (1).
  • the coating materials (4) are preferably pigmented. They are preferably selected from the coating materials (1) described above, in particular the fillers and basecoats (1) described above.
  • the coating materials (4) and (1) can have different material compositions. They preferably have an identical or almost identical composition in order to have the same or essentially the same application properties.
  • the thermal treatment can be carried out after a certain period of rest, whereby the conditions described above can be applied.
  • the thermal treatment is carried out, for example, with the aid of a gaseous, liquid and / or solid, hot medium, such as hot air, heated oil or heated rollers, or using microwave radiation, infrared light and / or near infrared light (NIR).
  • the heating is preferably carried out in a forced air oven or by irradiation with IR and / or NIR lamps.
  • thermal curing can also be carried out in stages.
  • the thermal treatment is advantageously carried out at temperatures above room temperature, preferably up to a maximum of 200 ° C. In special cases, higher temperatures can also be used.
  • the layer thicknesses of the coatings are preferably in the customarily used ranges:
  • Electric dip painting (1) Preferably 10 to 60, preferably 15 to 50 and in particular 15 to 40 ⁇ m;
  • the repair and double coatings according to the invention have excellent optical properties.
  • the adhesion between the first coat and the second coat is excellent even after exposure to a constant condensation water climate.
  • the process according to the invention can also be used for the production of third-party coatings. This may be necessary if the secondary paint is damaged during its manufacture or shows color deviations and therefore has to be repaired over a large area or completely. Examples and comparative tests
  • a monomer mixture of 652 parts by weight of ethylhexyl acrylate, 383 parts by weight of 2-hydroxyethyl methacrylate, 143 parts by weight of styrene, 212 parts by weight of 4-hydroxybutyl acrylate and 21 parts by weight of acrylic acid were added within four hours and an initiator solution of 113 parts by weight of the aromatic solvent and 113 parts by weight of tert-butyl perethylhexanoate , Evenly metered into the template for 5 hours.
  • the metering of the monomer mixture and the initiator solution was started simultaneously. After the initiator feed had ended, the resulting reaction mixture was heated to 140 ° C. with stirring for a further two hours and then cooled.
  • the resulting solution of the methacrylate copolymer (A) was diluted with a mixture of 1-methoxypropylacetate-2, butylglycol acetate and butyl acetate.
  • the resulting solution had a solids content of 65% by weight, determined in a forced air oven (one hour / 130 ° C.) and an acid number of 15 mg KOH / g solids.
  • the dual-cure clearcoat was prepared by mixing the ingredients listed in the table in the order listed and homogenizing the resulting mixture.
  • UV absorber substituted hydroxyphenyltriazine 1, 0
  • HALS N-methyl-2,2,6,6-tetramethylpiperidinyl ester
  • Irgacure ⁇ 184 (commercially available photoinitiator from Ciba Specialty Chemicals) 2.0 Genocure ® MBF (commercial photoinitiator from Rahn) 1, 0
  • Lucirin ® TPO commercially available photoinitiator from
  • Crosslinking agent (B1) Roskydal® UA VPLS 2337 isocyanatoacrylate from Bayer AG (based on: trimer hexamethylene diisocyanate; content of isocyanate groups: 12% by weight) 27.84
  • Crosslinking agent (B 2) isocyanatoacrylate based on the trimer of isophorone diisocyanate (70.5% in butyl acetate; viscosity: 1,500 mPas; content of isocyanate groups: 6.7% by weight; prepared as in Example 1 of EP 0 928 800 A 1) 6.96
  • steel panels were coated in succession with a cathodic electrodeposition coating which had been baked at 170 ° C. for 20 minutes and had a dry layer thickness of 18 to 22 ⁇ m.
  • the steel sheets were then coated with a commercially available two-component water filler from BASF Coatings AG, as is usually used for plastic substrates.
  • the resulting filler layer was baked at 90 ° C. for 30 minutes, so that a dry layer thickness of 35 to 40 ⁇ m resulted.
  • a commercial black waterborne basecoat from BASF Coatings AG was then applied with a layer thickness of 12 to 15 ⁇ m, after which the resulting waterborne basecoat films were flashed off at 80 ° C. for ten minutes. Then the clear coats with a layer thickness of 40 to 45 ⁇ m were applied pneumatically in a cloister with a gravity cup gun.
  • Example 1 the clear lacquer layers were flashed off at room temperature for 5 minutes and at 80 ° C. for 5 minutes; in Example 3, the clear lacquer layers were flashed off at room temperature for 5 minutes and at 80 ° C. for 10 minutes.
  • Examples 1 to 3 were then cured by irradiation with UV light at a dose of 1,500 mJ / cm 2 .
  • Examples 1 to 3 were repeated for the comparative experiments V1 to V3, except that the clearcoat layers after curing with UV radiation
  • Example 1 to 3 and in comparative experiments V1 to V3 the clear lacquer layers were flashed off at room temperature for 5 minutes. Subsequently, in Examples 1 and 2 and in Comparative Experiments V1 and V2, the clear lacquer layers were flashed off at 80 ° C. for 5 minutes and in Example 3 and Comparative Experiment V1 for 10 minutes at 80 ° C.
  • Example 1 and Comparative Experiment V1 The vented clear lacquer layers were hardened by irradiation with UV light at a dose of 1,500 mJ / cm 2 . Then, in Example 1 and Comparative Experiment V1, the test panels were heated to 90 ° C. for 30 minutes. In Examples 2 and 3 and comparative experiments V2 and V3, the test panels were heated to 140 ° C. for 20 minutes.
  • test panels were subjected to the cross-cut test (cross-cut with tesa tear according to DIN EN ISO 2409) and the VDA stone chip test after their production. Another part of the test panels was subjected to a condensation water constant climate (SKK) for 240 hours in accordance with DIN 50017 and DIN 53209. Some of the loaded test panels were subjected to the cross-cut test according to DIN EN ISO 2409 1 hour and another 97 hours after the load. The results can be found in the table.
  • SKK condensation water constant climate
  • A measurement 1 day after production
  • B measurement 1 hour after 240 hours SSK

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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)

Abstract

L'invention concerne un procédé pour appliquer une peinture de réparation ou une deuxième couche de peinture sur un revêtement (2) produit à partir d'un matériau de revêtement (2) durcissable par voie thermique et par exposition à un rayonnement actinique. L'invention est caractérisée en ce que (I) on applique au moins un matériau de revêtement (2), durcissable par voie thermique et par exposition à un rayonnement actinique, sur un substrat ou sur au moins une couche appliquée sur ce dernier, non durcie, durcie partiellement ou totalement durcie, constituée d'un matériau de revêtement (1) ; (II) on fait durcir la ou les couches obtenues (2) en les exposant à un rayonnement actinique ; (III) on applique sur la ou les couches obtenues (2) au moins un matériau de revêtement (3) durcissable par voie thermique et par exposition à un rayonnement actinique ; (IV) on fait durcir la ou les couches obtenues (3) en les exposant à un rayonnement actinique ; (V) on soumet à un traitement thermique les revêtements (2) et (3), ou les revêtements (2) et (3) ainsi que la ou les couches (1) présentes, non durcies ou partiellement durcies. L'invention concerne également la mise en oeuvre de ce procédé pour peindre des véhicules automobiles, des bâtiments, des fenêtres, des portes ou des meubles, dans le domaine de la peinture industrielle, et pour peindre des articles blancs.
PCT/EP2002/006699 2001-06-20 2002-06-18 Procede pour appliquer une peinture de reparation ou une deuxieme couche de peinture sur des revetements produits a partir de materiaux de revetement durcissables par voie thermique et par exposition a un rayonnement actinique Ceased WO2003000432A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002345057A AU2002345057A1 (en) 2001-06-20 2002-06-18 Method for retouching or revarnishing coatings

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10129660.6 2001-06-20
DE2001129660 DE10129660C1 (de) 2001-06-20 2001-06-20 Verfahren zur Reparaturlackierung oder Doppellackierung von Substraten

Publications (2)

Publication Number Publication Date
WO2003000432A2 true WO2003000432A2 (fr) 2003-01-03
WO2003000432A3 WO2003000432A3 (fr) 2004-02-12

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PCT/EP2002/006699 Ceased WO2003000432A2 (fr) 2001-06-20 2002-06-18 Procede pour appliquer une peinture de reparation ou une deuxieme couche de peinture sur des revetements produits a partir de materiaux de revetement durcissables par voie thermique et par exposition a un rayonnement actinique

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2005116117A1 (fr) * 2004-05-29 2005-12-08 Basf Coatings Ag Systeme de materiau de revetement a durcissement double et son utilisation pour le revetement interne et externe de substrats tridimensionnels formes de maniere complexe

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DE102015101027A1 (de) 2015-01-23 2016-07-28 Automobile & Technik Riepl Vorrichtung und Verfahren zum Beseitigen einer Unregelmäßigkeit einer Oberfläche

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DE19958726B4 (de) * 1999-12-06 2004-01-15 Basf Coatings Ag Pulverslurry und deren Verwendung zur Herstellung einer farb- und/oder effektgebenden Mehrschichtlackierung auf einem grundierten oder ungrundierten Substrat
DE19964282B4 (de) * 1999-12-06 2004-01-29 Basf Coatings Ag Verfahren zur Herstellung einer farb- und/oder effektgebenden Mehrschichtlackierung auf einem grundierten oder ungrundierten Substrat und mit Hilfe des Verfahrens herstellbare Mehrschichtlackierungen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005116117A1 (fr) * 2004-05-29 2005-12-08 Basf Coatings Ag Systeme de materiau de revetement a durcissement double et son utilisation pour le revetement interne et externe de substrats tridimensionnels formes de maniere complexe

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DE10129660C1 (de) 2002-12-12
WO2003000432A3 (fr) 2004-02-12

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