EP1218112B1 - Procede de laquage integre pour carosseries ou cabines de voitures ou de vehicules utilitaires, comportant des parties synthetiques, ainsi que pour pieces de rechange et pieces rapportees, laquage selon ce procede et pieces laquees - Google Patents

Procede de laquage integre pour carosseries ou cabines de voitures ou de vehicules utilitaires, comportant des parties synthetiques, ainsi que pour pieces de rechange et pieces rapportees, laquage selon ce procede et pieces laquees Download PDF

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Publication number
EP1218112B1
EP1218112B1 EP00954653A EP00954653A EP1218112B1 EP 1218112 B1 EP1218112 B1 EP 1218112B1 EP 00954653 A EP00954653 A EP 00954653A EP 00954653 A EP00954653 A EP 00954653A EP 1218112 B1 EP1218112 B1 EP 1218112B1
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EP
European Patent Office
Prior art keywords
parts
primer
electrically conductive
aqueous primer
coat
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
Application number
EP00954653A
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German (de)
English (en)
Other versions
EP1218112A2 (fr
Inventor
Klaus Arlt
Bernd Mayer
Franz-Josef Wylegalla
Norbert Zdahl
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BASF Coatings GmbH
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BASF Coatings GmbH
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Publication of EP1218112A2 publication Critical patent/EP1218112A2/fr
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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
    • B05D7/56—Three layers or more
    • B05D7/57—Three layers or more the last layer being a clear coat
    • B05D7/574—Three layers or more the last layer being a clear coat at least some layers being let to dry at least partially before applying the next layer
    • 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
    • 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
    • B05D3/002—Pretreatement
    • B05D3/005—Pretreatment for allowing a non-conductive substrate to be electrostatically coated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31511—Of epoxy ether
    • Y10T428/31515—As intermediate layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31554—Next to second layer of polyamidoester
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31605—Next to free metal

Definitions

  • the present invention relates to a new integrated painting method for Plastics containing bodies or cabins of cars and Commercial vehicles and their spare parts and attachments.
  • the concerns present invention the bodies or cabins of cars and Commercial vehicles and their spare parts and attachments, with the help of the new integrated coating process have been coated.
  • This process provides multi-layer coatings of excellent chemical Resistance and weather resistance as well as with outstanding Corrosion protection effect and excellent overall appearance.
  • Inline painting is the painting process in which the Plastic parts already after electrocoating the metal parts and before the Application of the filler on the assembly platform of the respective car body or the commercial vehicle cabin are added, after which the entire arrangement uniformly painted.
  • thermosetting coating materials after their curing at Häramgemperaturen below 100 ° C the Customer specifications, in particular with regard to the corrosion schooling effect, the stone chip resistance and condensation resistance, do not meet can.
  • Object of the present invention is to provide a new integrated method for Painting of plastic parts containing bodies of cars and Commercial vehicles and their spare parts and attachments to find that the Disadvantages of the prior art no longer has, but Bodies of passenger cars, in particular emergency vehicle cabins, supplies, which have a uniform color and in terms of their optical General impression, its anti-corrosive effect and its rockfall chemicals, Weathering and condensation resistance all requirements of the market.
  • the new integrated Method produced color and / or effect multi-layer coatings a very good resistance in high pressure cleaning test after previous Fatigue resistance and a high resistance to stone chips even at -20 ° C exhibit.
  • Multi-layer coating for bodies or cabins containing plastic parts of passenger cars and commercial vehicles as well as their spare parts and attachments of brevity half referred to as "multi-layer coating according to the invention".
  • the method according to the invention is used in car bodies, which today consist of metal parts and plastic parts. It also finds Application to cabs of commercial vehicles, in particular of trucks and buses, which today also consist of these components. Of Another method of the invention in the spare parts and the Attachments of the bodies and the cabins applied.
  • the inventive method is in the process step (1) from the Electrocoating of parts of the body or the cabin or their Spare parts and attachments made of metal.
  • Suitable metals are the conventional and well-known body steels whose surface is galvanized and / or can be phosphated.
  • electrocoating baths are aqueous coating materials (ETL) with a Solids content of in particular 5 to 30 wt .-%.
  • ETL aqueous coating materials
  • complementary functional groups (a2) come the binder (A) preferably thio, amino, hydroxyl, carbamate, allophanate, carboxy, and / or (meth) acrylate groups, but especially hydroxyl groups, and as complementary functional groups (b1) preferably anhydride, carboxy, Epoxy, blocked isocyanate, urethane, methylol, methylol ether, siloxane, Amino, hydroxy and / or beta-hydroxyalkylamide groups, but in particular blocked isocyanate groups into consideration.
  • the binders (A) with functional groups (a11) become cathodic depositable electrodeposition paints (KTL), whereas the binders (A) with functional groups (a12) in anodic electrodeposition paints (ATL) be applied.
  • Examples of suitable functional groups to be used according to the invention (a11) obtained by neutralizing agents and / or quaternizing agents in Cations can be transferred are primary, secondary or tertiary Amino groups, secondary sulfide groups or tertiary phosphines groups, in particular tertiary amino groups or secondary sulfide groups.
  • Suitable cationic groups to be used according to the invention (a11) are primary, secondary, tertiary or quaternary ammonium groups, tertiary sulfonium groups or quaternary phosphonium groups, preferably quaternary ammonium groups or quaternary ammonium groups, tertiary Sulfonium groups, but especially quaternary ammonium groups.
  • Suitable functional groups to be used according to the invention (a12), which can be converted by neutralizing agents into anions are Carboxylic acid, sulfonic acid or phosphonic acid groups, in particular Carboxylic acid groups.
  • Suitable anionic groups to be used according to the invention (a12) are carboxylate, sulfonate or phosphonate groups, in particular Carboxylate groups.
  • the selection of the groups (a11) or (a12) should be such that no interfering Reactions with the functional groups (a2) with the crosslinking agents (B) can react are possible.
  • the expert can therefore choose in simple way to make his expertise.
  • Suitable neutralizing agents for cationic convertible functional groups (a11) are inorganic and organic acids such as Sulfuric acid, hydrochloric acid, phosphoric acid, formic acid, acetic acid, lactic acid, Dimethylolpropionic acid or citric acid, in particular formic acid, Acetic acid or lactic acid.
  • Suitable Neutralizing Agents for Anion Convertible functional groups are ammonia, ammonium salts, such as Ammonium carbonate or ammonium bicarbonate, as well as amines, e.g. Trimethylamine, triethylamine, tributylamine, dimethylaniline, diethylaniline, Triphenylamine, dimethylethanolamine, diethylethanolamine, methyldiethanolamine, Triethanolamine and the like.
  • the amount of neutralizing agent is chosen so that 1 to 100 equivalents, preferably 50 to 90 equivalents of the functional Groups (a11) or (a12) of the binder (b1) are neutralized.
  • binders (A) for ATL are from the patent DE-A-28 24 418 known. This is preferably polyester, Epoxy resin esters, poly (meth) acrylates, maleate oils or polybutadiene oils with a weight average molecular weight of 300 to 10,000 daltons and a Acid number from 35 to 300 mg KOH / g.
  • KTL examples of suitable KTL are known from the patents EP-A-0 082 291, EP-A-0 234 395, EP-A-0 227 975, EP-A-0 178 531, EP-A-333 327, EP-A-0 310 971, EP-A-0 456,270, US-A-3,922,253, EP-A-0 261 385, EP-A-0 245 786, DE-A-33 24 211, EP-A-0 414 199 or EP-A-476 514.
  • amine numbers preferably between 20 and 250 mg KOH / g and a weight average molecular weight of 300 to 10,000 daltons.
  • KTL and the corresponding electrocoating baths are used preferably used.
  • the ETL contain crosslinking agents (B).
  • Suitable crosslinking agents (B) are blocked organic Polyisocyanates, in particular blocked so-called paint polyisocyanates, with aliphatic, cycloaliphatic, araliphatic and / or aromatic bound, blocked isocyanate groups.
  • Polyisocyanates with 2 to 5 are preferred for their preparation Isocyanate groups per molecule and with viscosities of 100 to 10,000, preferably 100 to 5000 and especially 100 to 2000 mPas (at 23 ° C) used.
  • the polyisocyanates in the usual and known manner be hydrophilic or hydrophobic modified.
  • polyisocyanate adducts examples include isocyanate group-containing Polyurethane prepolymers obtained by reaction of polyols with an excess can be prepared on polyisocyanates and are preferably low in viscosity. It is also possible to use isocyanurate, biuret, allophanate, iminooxadiazinedione, Urethane, urea carbodiimide and / or uretdione groups Polyisocyanates are used. Urethane containing polyisocyanates For example, by reacting a portion of the isocyanate groups with Polyols, e.g. Trimethylolpropane and glycerin.
  • Polyols e.g. Trimethylolpropane and glycerin.
  • crosslinking agents (B) are all known aliphatic and / or cycloaliphatic and / or aromatic polyepoxides, for example based on bisphenol-A or bisphenol-F.
  • polyepoxides for example, those commercially available under the names are also suitable Epikote® from Shell, Denacol® from Nagase Chemicals Ltd., Japan, available polyepoxides, e.g.
  • Denacol EX-411 Penaerythritol polyglycidyl ether
  • Denacol EX-321 Trimethylolpropane polyglycidyl ether
  • Denacol EX-512 polyglycerol polyglycidyl ether
  • Denacol EX-521 polyglycerol polyglycidyl ether
  • crosslinking agent (B) can also tris (alkoxycarbonylamino) triazines (TACT) of the general formula be used.
  • tris (alkoxycarbonylamino) triazines (B) examples include U.S. Pat US-A-4,939,213, US-A-5,084,541 or EP-A-0 624 577 described.
  • methyl-butyl mixed esters the butyl 2-ethylhexyl mixed esters and the butyl esters. These have compared to the pure methyl ester the Advantage of better solubility in polymer melts and also tend less to crystallize.
  • crosslinking agents (B) are aminoplast resins, For example, melamine, guanamine, benzoguanamine or urea resins.
  • the customary and known amino resins are also suitable, their methylol and / or methoxymethyl groups z. T. by means of carbamate or Allophanate groups are defunctionalized.
  • Crosslinking agent of this kind in US Pat. Nos. 4,710,542 and EP-B-0 245 700 and in the article by B. Singh and coworkers "Carbamylmethylated Melamines, Novel Crosslinkers for the Coatings Industry "in Advanced Organic Coatings Science and Technology Series, 1991, Vol. 13, pages 193 to 207.
  • crosslinking agents (B) are beta-hydroxyalkylamides such as N, N, N ', N'-tetrakis (2-hydroxyethyl) adipamide or N, N, N', N'-tetrakis (2-hydroxypropyl) adipamide.
  • crosslinking agents (B) are compounds with im Means at least two groups capable of transesterification, for example Reaction products of malonic diesters and polyisocyanates or of Esters and partial esters of polyhydric alcohols of malonic acid with Monoisocyanates, as described in European Patent EP-A-0 596 460 to be discribed;
  • the amount of crosslinking agent (B) in the ETL can vary widely and be directed in particular on the one hand on the functionality of the crosslinking agent (B) and second, according to the number of existing in the binder (A) crosslinking functional groups (a2) and the crosslink density, the you want to achieve.
  • the person skilled in the art can therefore determine the amount of crosslinking agent (B) on the basis of its general expertise, where appropriate with the aid of Determine easier orienting experiments.
  • This is advantageous Crosslinking agent (B) in the ETL in an amount of 5 to 60% by weight, particularly preferably 10 to 50% by weight and in particular 15 to 45% by weight, in each case based on the solids content of the inventive Coating material, included.
  • the Amounts of crosslinking agent (B) and binder (A) to be chosen so that in the ETL the ratio of functional groups (b1) in the crosslinking agent (B) and functional groups (a2) in the binder (A) between 2: 1 to 1: 2, preferably 1.5: 1 to 1: 1.5, more preferably 1.2: 1 to 1: 1.2 and especially 1.1: 1 to 1: 1.1.
  • lead-free cathodic catheters offer particular advantages and are therefore preferably used.
  • electrocoating has no special features but is carried out as usual by the metal parts to be coated in the electrodeposition bath as a cathode or anode, in particular as a cathode, connected after which the ETL is deposited on the metal surface.
  • the Electrocoating After Removal of the metal parts from the electro dip is the Electrocoating after a certain period of rest in the usual and well-known Thermally cured, resulting in the electrodeposition coating.
  • the electrocoated metal parts in the inventive Process step (2) integrated with the plastic parts, preferably accurately together.
  • the metal parts on a mounting platform (skid) accurately positioned, after which you attach the plastic parts.
  • the plastic parts on the assembly platform (skid) accurately positioned and attached the metal parts.
  • the entire body that is the integrated body or cabin in one Uniform operation to paint.
  • the plastic parts have no primer (variant 2.1).
  • the plastic parts have a primer on their surface from a thermally hardened at temperatures ⁇ 100 ° C electrically conductive Hydroprimer painting on (variant 2.2).
  • plastic parts have on their surface a dried, however, uncured electrically conductive hydroprimer layer on (variant 2.3).
  • electrically conductive hydroprimer suitable as is customary for the Coating of plastics such as ABS, AMMA, ASA, CA, CAB, EP, UF, CF, MF, MPF, PF, PAN, PA, PE, HDPE, LDPE, LLDPE, UHMWPE, PET, PMMA.
  • PP, PS, SB, PUR, PVC, RF, SAN, PBT, PPE, POM, PUR-RIM, SMC, BMC, PP-EPDM and UP (short designations according to DIN 7728T1) as well as their Polymer blends and fiber reinforced plastics can be used on this basis and which can be cured at temperatures ⁇ 100 ° C. If necessary the plastic parts for purposes of better adhesion of the hydroprimer in power wash systems or by flaming or by plasma treatment pretreated.
  • Suitable electrically conductive hydroprimers are so-called Two-component systems.
  • Component I of the electrically conductive hydroprimer contain conventional and known aqueous polyurethane dispersions, preferably based on Polyester polyurethanes.
  • polycarboxylic acids examples include aromatic, aliphatic and cycloaliphatic polycarboxylic acids. Preference is given to aromatic and / or aliphatic, especially aromatic, polycarboxylic acids used.
  • aromatic polycarboxylic acids examples include phthalic acid, Isophthalic acid, terephthalic acid, phthalic acid, isophthalic acid or Terephthal yarnremonosulfonat, or halophthalic acids, such as tetrachloro or Tetrabromophthalic acid, of which isophthalic acid is advantageous and therefore is preferably used.
  • Suitable acyclic aliphatic or unsaturated Polycarboxylic acids are oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, Pimelic acid, suberic acid, azelaic acid, sebacic acid, Undecanedicarboxylic acid, dodecanedicarboxylic acid or dimer fatty acids or Maleic acid, fumaric acid or itaconic acid of which adipic acid, glutaric acid, Azelaic acid, sebacic acid, dimer fatty acids and maleic acid are advantageous and therefore preferably used.
  • Suitable cycloaliphatic and cyclic unsaturated Polycarboxylic acids are 1,2-cyclobutanedicarboxylic acid, 1,3-cyclobutanedicarboxylic acid, 1,2-cyclopentanedicarboxylic acid, 1,3-cyclopentanedicarboxylic acid, Hexahydrophthalic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 4-methylhexahydrophthalic acid, tricyclodecanedicarboxylic acid, Tetrahydrophthalic acid or 4-methyltetrahydrophthalic acid.
  • These dicarboxylic acids can be found both in their cis- and in theirs trans form as well as a mixture of both forms.
  • esterifiable derivatives of the abovementioned Polycarboxylic acids e.g. their mono- or polyvalent esters with aliphatic Alcohols with 1 to 4 carbon atoms or hydroxy alcohols with 1 to 4 carbon atoms.
  • anhydrides of the above polycarboxylic acids used, if they exist.
  • Monocarboxylic acids such as benzoic acid, tert-butylbenzoic acid, Lauric acid, isononanoic acid, fatty acids naturally occurring oils, acrylic acid, methacrylic acid, ethacrylic acid or crotonic acid.
  • Isononanoic acid is preferably used as the monocarboxylic acid.
  • suitable polyols are diols and triols, in particular diols. Usually, triols in addition to the diols in minor amounts used to introduce branches in the polyester polyols.
  • Suitable diols are ethylene glycol, 1,2- or 1,3-propanediol, 1,2-, 1,3- or 1,4-butanediol, 1,2-, 1,3-, 1,4- or 1,5-pentanediol, 1,2-, 1,3-, 1,4-, 1,5- or 1,6-hexanediol, Hydroxypivalic acid neopentyl ester, neopentyl glycol, Diethylene glycol, 1,2-, 1,3- or 1,4-cyclohexanediol, 1,2-, 1,3- or 1,4-cyclohexanedimethanol, Trimethylpentanediol, Ethylbutylpropandiol or the positionally isomeric diethyloctanediols. These diols can also be used as such for the Preparation of the polyurethanes (A) to be used according to the invention become.
  • diols of the formula I or II: in which R 1 and R 2 each represent an identical or different radical and are an alkyl radical having 1 to 18 C atoms, an aryl radical or a cycloaliphatic radical, with the proviso that R 1 and / or R 2 may not be methyl ; in which R 3 , R 4 , R 6 and R 7 each represent identical or different radicals and are an alkyl radical having 1 to 6 C atoms, a cycloalkyl radical or an aryl radical and R 5 is an alkyl radical having 1 to 6 C atoms, is an aryl radical or an unsaturated alkyl radical having 1 to 6 C atoms, and n is either 0 or 1.
  • Suitable diols of the general formula I I all propanediols of the formula are useful, in which either R 1 or R 2 or R 1 and R 2 is not methyl, such as 2-butyl-2-ethylpropanediol-1,3, 2-butyl -2-methylpropanediol-1,3,2-phenyl-2-methylpropanediol-1,3,2-propyl-2-ethylpropanediol-1,3,2-di-tert-butylpropanediol-1,3, 2- Butyl 2-propylpropanediol-1,3,1-dihydroxymethylbicyclo [2.2.1] heptane, 2,2-diethylpropanediol-1,3,2,2-dipropylpropanediol-1,3 or 2-cyclohexyl- 2-methylpropanediol-1,3 and others.
  • diols II of the general formula II for example 2,5-dimethylhexanediol-2,5, 2,5-diethylhexanediol-2,5, 2-ethyl-5-methylhexanediol-2,5, 2,4-Dimethylpentanediol-2,4,3,3-dimethylbutanediol-2,3,4- (2'-hydroxypropyl) benzene and 1,3- (2-hydroxypropyl) benzene.
  • hexanediol and neopentyl glycol are particularly advantageous and are therefore used with particular preference.
  • the abovementioned diols can also be used as such for the preparation of Polyester polyurethanes are used with.
  • triols examples include trimethylolethane, trimethylolpropane or glycerol, in particular trimethylolpropane.
  • triols can also be used as such for the preparation of Polyester polyurethanes are used with (see the patent EP-A-0 339 433).
  • monools may be used as a minor amount of monools.
  • suitable monools are alcohols or phenols, such as ethanol, Propanol, n-butanol, sec-butanol, tert-butanol, amyl alcohols, hexanols, Fatty alcohols, allyl alcohol or phenol.
  • the preparation of the polyester polyols can in the presence of small amounts of suitable solvent can be carried out as entrainer.
  • entrainment agent be z.
  • aromatic hydrocarbons in particular xylene and (cyclo) aliphatic hydrocarbons, e.g. B. cyclohexane or Methylcyclohexane used.
  • polyester diols obtained by reacting a lactone with a diol. They are characterized by the presence of terminal hydroxyl groups and recurring polyester components of the formula - (- CO- (CHR 8 ) m - CH 2 -O -) -.
  • No substituent contains more than 12 carbon atoms. The total number of carbon atoms in the substituent does not exceed 12 per lactone ring. Examples thereof are hydroxycaproic acid, hydroxybutyric acid, hydroxydecanoic acid and / or hydroxystearic acid.
  • the unsubstituted ### caprolactone in which m is 4 and all R 8 substituents are hydrogen is preferred.
  • the reaction with lactone is started by low molecular weight polyols such as ethylene glycol, 1,3-propanediol, 1,4-butanediol or dimethylolcyclohexane.
  • polyols such as ethylene glycol, 1,3-propanediol, 1,4-butanediol or dimethylolcyclohexane.
  • other reaction components such as ethylenediamine, Alkyldialkanolamine or urea can be reacted with caprolactone.
  • polylactam diols which are prepared by reacting, for example, ### -caprolactam with low molecular weight diols.
  • Polyether polyols in particular having a number average molecular weight of from 400 to 5000, in particular from 400 to 3000, can be used in addition to the polyester polyols described above.
  • Examples which are particularly suitable are linear or branched polyether diols, such as poly (oxyethylene) glycols, poly (oxypropylene) glycols and poly (oxybutylene) glycols.
  • the polyether diols should not contain excessive amounts of ether groups bring in, because otherwise the resulting polyurethanes swell in water.
  • they can be used in amounts that are non-ionic Stabilization of polyurethanes guaranteed. They then serve as a chain functional nonionic groups (a13).
  • (potential) cationic functional groups (a11) takes place on the incorporation of compounds containing at least one, in particular two, towards isocyanate-reactive and at least one for cation formation containing a competent group in the molecule; the amount to be used can from the desired amine number are calculated.
  • Suitable isocyanate-reactive groups are in particular Hydroxyl groups and primary and / or secondary amino groups, of which the hydroxyl groups are preferably used.
  • Suitable compounds of this type are 2,2-dimethylolethyl or - propylamine blocked with a ketone, the resulting Ketoxim ferry before the formation of the cationic group (b1) again is hydrolyzed, or N, N-dimethyl, N, N-diethyl or N-methyl-N-ethyl-2,2-dimethylolethyl or -propylamine.
  • Suitable compounds of this type are those which contain two isocyanate-reactive groups in the molecule. Suitable isocyanate-reactive groups are in particular hydroxyl groups, as well as primary and / or secondary amino groups.
  • alkanoic acids having two substituents on the ### - permanent carbon atom can be used.
  • the substituent may be a hydroxyl group, an alkyl group or, preferably, an alkylol group.
  • These alkanoic acids have at least one, generally 1 to 3, carboxyl groups in the molecule. They have 2 to about 25, preferably 3 to 10 carbon atoms.
  • suitable alkanoic acids are dihydroxypropionic acid, dihydroxysuccinic acid and dihydroxybenzoic acid.
  • a particularly preferred group of alkanoic acids are the ###, ### - dimethylolalkanoic acids of the general formula R 10 -C (CH 2 OH) 2 COOH, where R 10 is a hydrogen atom or an alkyl group having up to about 20 carbon atoms.
  • R 10 is a hydrogen atom or an alkyl group having up to about 20 carbon atoms.
  • particularly suitable alkanoic acids are 2,2-dimethylolacetic acid, 2,2-dimethylolpropionic acid, 2,2-dimethylolbutyric acid and 2,2-dimethylolpentanoic acid.
  • the preferred dihydroxyalkanoic acid is 2,2-dimethylolpropionic acid.
  • amino-containing compounds are ###, ### - diaminovaleric acid, 3,4-diaminobenzoic acid, 2,4-diaminotoluenesulfonic acid and 2,4-diaminodiphenyl ether sulfonic acid.
  • Nonionic stabilizing poly (oxyalkylene) groups (a13) can be introduced into the polyurethane molecules as lateral or terminal groups.
  • alkoxy poly (oxyalkylene) alcohols having the general formula R 11 O - (- CH 2 -CH 12 -O-) r H in the R 11 is an alkyl radical having 1 to 6 carbon atoms
  • R 12 is a hydrogen atom or an alkyl radical with 1 to 6 carbon atoms
  • the index r is a number between 20 and 75
  • Suitable polyols for chain extension are polyols with up to 36 carbon atoms per molecule such as ethylene glycol, diethylene glycol, Triethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, 1,2-butylene glycol, 1,6-hexanediol, trimethylolpropane, castor oil or hydrogenated Castor oil, di-trimethylolpropane ether, pentaerythritol, 1,2-cyclohexanediol, 1,4-cyclohexanedimethanol, Bisphenol A, bisphenol F, neopentyl glycol, Hydroxypivalic acid neopentyl glycol ester, hydroxyethylated or hydroxypropylated bisphenol A, hydrogenated bisphenol A or mixtures thereof (see patents EP-A-0 339 433, EP-A-0 436 941, EP-A-0 517 70
  • polyamines have at least two primary and / or secondary On amino groups.
  • Polyamines are essentially alkylene polyamines having 1 to 40 carbon atoms, preferably about 2 to 15 carbon atoms. They can carry substituents that are not reactive with isocyanate groups Have hydrogen atoms.
  • Examples are polyamines with linear or branched aliphatic, cycloaliphatic or aromatic structure and at least two primary amino groups.
  • Diamines hydrazine, ethylenediamine, propylenediamine, 1,4-butylenediamine, Piperazine, 1,4-cyclohexyldimethylamine, hexamethylenediamine-1,6, Trimethylhexamethylenediamine, methanediamine, isophoronediamine, 4,4'-diaminodicyclohexylmethane and aminoethylenothanolamine.
  • preferred Diamines are hydrazine, alkyl or cycloalkyldiamines such as propylenediamine and 1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane.
  • polyamines which have more than two amino groups contained in the molecule.
  • Such useful polyamines are diethylenetriamine, triethylenetetramine, Dipropylenediamine and dibutylenetriamine.
  • Monoamine is ethylhexylamine mentioned (see the patent EP-A-0 089 497).
  • Suitable amino alcohols are ethanolamine or diethanolamine.
  • the polyurethanes may be terminal and / or lateral olefinically unsaturated Contain groups.
  • Groups of this kind can, for example, with the help of Compounds are introduced which contain at least one isocyanate-reactive Group, in particular hydroxyl group, and at least one vinyl group exhibit.
  • suitable compounds of this type are Trimethylolpropane monoallyl ether or trimethylolpropane mono (meth) acrylate.
  • polyurethanes can be grafted with ethylenically unsaturated compounds become.
  • suitable polyurethanes to be used according to the invention (A) which are present as Pfropfmischpolymerisate, are from the patents EP-A-0 521 928, EP-A-0 522 420, EP-A-0 522 419 or EP-A-0 730 613 known.
  • the production of the polyurethanes has no special features, but takes place according to the usual and known methods of Polyurethane chemistry.
  • the polyurethanes are used to prepare the electrically conductive hydroprimer neutralized with the neutralizing agents described above and in Dispersed water so that a dispersion having a solids content of preferably 10 to 70, preferably 20 to 60, particularly preferably 25 to 50 and in particular 30 to 45 wt .-%, each based on the dispersion results.
  • the further essential constituent of component I of the invention using electrically conductive hydroprimer is at least one electrical conductive pigment.
  • suitable electrically conductive pigments are Metal pigments, conductivity blacks, doped pearlescent pigments or conductive Barium sulfate.
  • Particularly suitable electrically conductive pigments are the Conductivity soot In addition, on Römpp Lexikon varnishes and printing inks, Georg Thieme Verlag, Stuttgart, New York, 1998, "Metallpigmente", p. 381, and "Conductive Pigments,” p. 354.
  • the content of the electrically conductive hydroprimer to electrically conductive Pigments can vary very widely and is preferably from 0.01 to 10, preferably 0.1 to 8, more preferably 0.5 to 7, most preferably 0.5 to 6 and in particular 0.5 to 5 wt .-%, each based on the total amount of the electrically conductive hydroprimer.
  • Component II of the invention to be used electrically conductive Hydroprimer contains at least one polyisocyanate, which advantageously as such is liquid.
  • component II may also be conventional and known organic solvents, compared to polyisocyanates are inert.
  • the weight ratio of component I and component II can vary very broadly and is determined by the one Crosslinking density, which is the cured electrically conductive Hydroprimer painting should, and the other according to the number of isocyanate-reactive groups in the component I and the functionality and the Concentration of the polyisocyanates in the component II.
  • the weight ratio I: II at 100: 50, preferably 100: 40, preferably 100: 30, more preferably 100: 20, most preferably 100: 15 and especially 100: 10.
  • the hydroprimer becomes in the process step (3) according to the invention at temperatures ⁇ 100 ° C thermally hardened, whereby the electrically conductive hydroprimer coating results.
  • Examples of suitable light hydroprimers to be used according to the invention are also two-component systems.
  • Your component I contains at least one in Water dissolved or dispersed hydroxyl group-containing binder and at least one light pigment, and its component II contains at least one Polyisocyanate.
  • Suitable hydroxyl-containing binders are polyesters, polyacrylates, Polyurethanes, acrylated polyesters and / or acrylated polyurethanes, in particular Polyurethanes, into consideration.
  • suitable polyurethanes are the above . described
  • suitable light pigments are those above and below pigments described, provided that they are light and opaque.
  • the bright hydroprimers are used with advantage if one Alignment between the hue of preferably dark, electrically conductive hydroprimer coating and, in particular, bright, Waterborne coating is necessary.
  • the primer resulting in process step (3) the integrated body or cabin or their spare parts and attachments applied color and / or effect water-based paint.
  • Suitable aqueous basecoats contain at least one dissolved in water or dispersed hydroxyl-containing binder and at least one color and / or effect pigment.
  • they can be the above described paint customary additives and at least one of the above contain described crosslinking agents in the known effective amounts.
  • Suitable hydroxyl-containing binders are polyurethanes and / or acrylated polyurethanes.
  • the water-based paint can still at least one hydroxyl-containing polyacrylate, a hydroxyl-containing polyester and / or a hydroxylated acrylated polyester as an additional (s) Binder included.
  • Suitable color and / or effect pigments can be inorganic or organic compounds are produced. Of the Therefore, waterborne basecoat to be used according to the present invention is guaranteed This variety of suitable pigments a universal use and allows the realization of a variety of color tones and optical effects.
  • metal flake pigments such as commercially available Aluminum bronzes, chromated aluminum bronzes according to DE-A-36 36 183, commercially available stainless steel bronzes and non-metallic effect pigments, such as Example pearlescent or interference pigments used.
  • metal flake pigments such as commercially available Aluminum bronzes, chromated aluminum bronzes according to DE-A-36 36 183, commercially available stainless steel bronzes and non-metallic effect pigments, such as Example pearlescent or interference pigments used.
  • Non-metallic effect pigments such as Example pearlescent or interference pigments used.
  • suitable inorganic color pigments are titanium dioxide, Iron oxides, sicotrans yellow and carbon black.
  • suitable organic coloring pigments are thioindigo pigments indanthrene blue, cromophthal red, Irgazine orange and Heliogen green.
  • the proportion of pigments in the aqueous basecoat can be extremely wide vary and depends mainly on the opacity of the pigments, the desired hue and the desired optical effect.
  • the pigments in the aqueous basecoat according to the invention in an amount of 0.5 to 50, preferably 0.5 to 45, particularly preferably 0.5 to 40, very particularly preferably 0.5 to 35 and in particular 0.5 to 30 wt .-%, each based on the total weight of the water-based paint.
  • This can also be Pigment / binder ratio, d. H. the ratio of the pigments to the Polyurethanes and other optional binders, vary widely.
  • this ratio is 6.0: 1.0 to 1.0: 50, preferably 5: 1.0 to 1.0: 50, more preferably 4.5: 1.0 to 1.0: 40, more preferably 4: 1.0 to 1.0: 30 and especially 3.5: 1.0 to 1.0 : 25.
  • pigments can also pigment pastes in the inventive Waterborne basecoats are incorporated, wherein as a friction resins u.a. the polyurethanes be considered.
  • the Water-based paint After its application in a conventional manner, the Water-based paint not thermally cured, but only dried.
  • process step (5) in process step (5), reference is made to dried waterborne basecoat wet-on-wet at least one, preferably one. Two-component clearcoat applied, whereby the clearcoat results.
  • the two-component clearcoats comprise a component I. with at least one hydroxyl-containing binder and a Component II with at least one polyisocyanate.
  • Components I and II are stored separately until their common use.
  • Suitable polyisocyanates are those described above.
  • Suitable hydroxyl-containing binders are oligomeric or polymeric, random, alternating and / or block-like constructed linear and / or branched and / or comb-like (co) polymers of ethylenic unsaturated monomers, or polyaddition resins and / or Polycondensation. These terms are supplemented by Römpp lexicon Paints and printing inks, Georg Thieme Verlag, Stuttgart, New York, 1998, page 457, "Polyaddition” and “Polyaddition Resins (Polyadducts)", as well as pages 463 and 464, "polycondensates”, “polycondensation” and “polycondensation resins” directed.
  • suitable (co) polymers are poly (meth) acrylates and partially saponified polyvinyl esters.
  • Suitable polyaddition resins and / or polycondensation resins are polyesters, alkyds, polyurethanes, polylactones, polycarbonates, polyethers, Epoxy-amine adducts, polyureas, polyamides or polyimides.
  • Binders or resins are oligomers and polymers. As part of the The present invention is understood to mean oligomers resins which at least 2 to 15 repeating monomer units in its molecule contain. In the context of the present invention, polymers are used Resins understood that have at least 10 repeating monomer units in their Contain molecule. In addition to these terms on Römpp lexicon Paints and printing inks, Georg Thieme Verlag, Stuttgart, New York, 1998, »Oligomers«, page 425, referenced.
  • hydroxyl-containing resins contain primary and / or secondary hydroxyl groups. It is a whole significant advantage of the method and the Resins of the invention using both types of hydroxyl groups can be. This allows the reactivity of the resins of the invention to control the steric effects.
  • the OH number of the hydroxyl groups to be used according to the invention containing resins can vary very widely and is preferably from 10 to 500, preferably 20 to 400 and in particular 30 to 350 mg KOH / g.
  • the resin may further contain at least one functional group which when irradiated with actinic radiation with a group of their kind or one reacts to another functional group.
  • These functional groups can already in the invention to be used hydroxyl-containing Resins may be present or subsequently in the resins by polymer analogues Reactions, be introduced.
  • Suitable functional groups of this type are allyl, vinyl acrylate or Methacrylate groups, in particular acrylate groups.
  • At the actinic Radiation can be electromagnetic radiation such as X-rays, UV radiation, visible light or near IR light (NIR) or vice versa Corpuscular radiation act like electron beams.
  • hydroxyl-containing binders For example, poly (meth) acrylates, polyesters, and polyurethanes are preferred used. Particular advantages result from the joint use of the Poly (meth) acrylates and the polyester.
  • the waterborne basecoat and the clearcoat are added in process step (6) according to the invention together at temperatures ⁇ 100 ° C thermally or thermally and cured with actinic radiation, wherein especially the two-component clearcoat thermally or thermally and with actinic radiation (dual cure) is cured. This results in the Basecoat and clearcoat.
  • the clearcoat can with a high scratch resistant clearcoat are overcoated.
  • suitable Clearcoats for the production of such highly scratch-resistant clearcoats are organically modified ceramic materials, which are also under the brand ORMOCER®.
  • the application of the Coating materials described above by all conventional Application methods such as Spraying, doctoring, painting, casting, diving, Soaking, trickling or rolling done.
  • It can be coated Substrate (the integrated body or cabin as well as the spare part or Anbauteil) as such, with the application device or system is moved.
  • the substrate to be coated can also be moved, wherein the application equipment rests relative to the substrate or in a suitable manner is moved. Which method is used depends primarily on the size of the substrate. So you become as big a substrate as a cabin for Commercial vehicles primarily with the help of mobile application facilities coat.
  • spray application methods are 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.
  • the application can be carried out at temperatures of max. 70 to 80 ° C are performed so that reaches appropriate application viscosities be, without that in the momentarily acting thermal load a Change or damage of the coating material and its if necessary, reprocessing overspray. That's how it works Hot spraying be designed so that the coating material only very briefly in the or just before the spray nozzle is heated.
  • the spray booth used for the application for example, with a optionally be operated temperature-controlled circulation, with a suitable absorption medium for the overspray, z. B. the coating material itself, is operated.
  • the application is under illumination with visible light of a Wavelength of about 550 nm or performed with exclusion of light. hereby be a material change or damage to the coating material and of the overspray avoided.
  • the electrically conductive hydroprimer layer and the light hydroprimer layer, the basecoat layer and the clearcoat layer in one Wet layer thickness applied, that after their curing layers with the for their Functions necessary and advantageous layer thicknesses result.
  • this layer thickness is 10 to 150, preferably 15 to 120, especially preferably 20 to 100 and in particular 25 to 90 microns
  • in the case of Basecoat it is 5 to 50, preferably 10 to 40, especially preferably 12 to 30 and in particular 15 to 25 microns
  • Clearcoating is 10 to 100, preferably 15 to 80, especially preferably from 20 to 70 and in particular from 25 to 60 ⁇ m.
  • the thermal curing can take place after a certain rest period. she can a duration of 30 seconds to 2 hours, preferably 1 minute to 1 hour and especially 1 minute to have 45 minutes.
  • the rest period is used for example for the course and the Degassing of the paint layers or for evaporation of volatile components like solvents.
  • the rest period can be increased by the application of elevated temperatures up to 90 ° C and / or reduced air humidity ⁇ 10g water / kg air, In particular, ⁇ 5g / kg of air, supported and / or shortened, provided that no damage or changes in the paint layers occur, such as one premature full networking.
  • the thermal curing has no special features, but takes place by the usual and known methods such as heating in one Convection oven or irradiation with IR lamps.
  • the thermal Curing also be done gradually.
  • the thermal Curing at a temperature of 50 to 100 ° C, more preferably 80 to 100 ° C and in particular 90 to 100 ° C for a period of 1 min to 2 h, more preferably 2 minutes to 1 hour and especially 3 minutes to 30 minutes.
  • the thermal curing can, with appropriate material composition of the coating material is supplemented by curing with actinic radiation in particular UV radiation and / or electron beams can be used. Optionally, it can with actinic radiation of other sources of radiation.
  • actinic radiation in particular UV radiation and / or electron beams can be used.
  • it can with actinic radiation of other sources of radiation.
  • Electron beams are preferably carried out under an inert gas atmosphere. This For example, by supplying carbon dioxide and / or nitrogen directly be ensured to the surface of the paint layer.
  • Radiation sources and optical aids For curing with actinic radiation, the usual and known Radiation sources and optical aids applied.
  • suitable Radiation sources are high or low pressure mercury vapor lamps, which optionally doped with lead to a beam window up to 405 nm open, or electron beam sources. Their arrangement is known in principle and can the circumstances of the workpiece and the process parameters be adjusted.
  • For complicated shaped workpieces such as Automotive bodies can use the areas that are not directly accessible to radiation (Shadow areas) such as cavities, folds and other design-related Undercuts connected with point, small area or round radiators with an automatic movement device for the irradiation of Cavities or edges are cured.
  • the curing can be done in stages, d. H. by multiple Exposure or irradiation with actinic radiation. This can too alternately, d. h., that alternating with UV radiation and Electron radiation is cured.
  • the color and / or effect multicoat system can still with a highly scratch-resistant clearcoat (6) be provided.
  • the color and / or effect multicoat systems according to the invention have an excellent property profile, which in terms of mechanics, Optics, corrosion resistance and adhesion even at very low temperatures and / or very well balanced after condensation. So have the Multicoat paint systems of the invention required by the market high optical quality and interlayer adhesion and throw no problems like lack of condensation resistance, cracking (mud cracking) in the Basecoats or flow defects or surface structures in the Clearcoats on.
  • the multicoat system of the invention has a excellent metallic effect.
  • an excellent D.O.I. distinctiveness of the reflected image
  • excellent surface smoothness she is weather resistant, resistant to chemicals and bird droppings and scratch resistant and shows a very good reflow behavior.
  • Another important advantage is the excellent recoatability of the according to the invention even without sanding. This can they easily with conventional and well-known high scratch resistant coating materials the base of organically modified ceramic materials are coated.
  • a multi-layer coating can be realized can, which is based predominantly on aqueous coating materials.
  • the inventive integrated bodies of Passenger cars or cabins of commercial vehicles and their spare parts and attachments also a longer service life, a better aesthetic impression when Viewers and better technological usability on what they do economically attractive.

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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)
  • Body Structure For Vehicles (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Claims (18)

  1. Procédé intégré pour le peinturage de carrosseries ou d'habitacles de voitures de tourisme et de véhicules utilitaires, ainsi que de leurs pièces de rechange et pièces de construction, comportant des parties en matière plastique, dans lequel
    1) on revêt d'une peinture pour électrodéposition les parties métalliques de la carrosserie ou de l'habitacle et/ou de leurs pièces de rechange ou pièces de construction et on fait durcir thermiquement la couche résultante de peinture par électrodéposition, ce qui donne le revêtement de peinture par électrodéposition, anticorrosion ;
    2) les parties métalliques de la carrosserie ou de l'habitacle et/ou de leurs pièces de rechange ou pièces de construction, peintes par électrodéposition, sont intégrées avec les parties en matière plastique de la carrosserie ou de l'habitacle, les parties en matière plastique
    2.1) ne présentant aucun apprêt sur leur surface,
    2.2) présentant sur leur surface un apprêt à base d'un revêtement d'hydroprimaire conducteur de l'électricité, durci thermiquement à des températures ≤100°C ou
    2.3) présentant sur leur surface une couche d'hydroprimaire conducteur de l'électricité ayant commencé à sécher, en partie durcie ;
    3) on revêt d'un hydroprimaire la carrosserie ou l'habitacle en métal-matière plastique intégrés,
    3.1) la carrosserie ou l'habitacle en métal-matière plastique intégrés ainsi que leurs pièces de rechange ou pièces de construction, dont les parties en matière plastique ne comportent aucun apprêt (variante 2.1) étant revêtus uniquement d'un hydroprimaire conducteur de l'électricité et la couche d'hydroprimaire résultante étant durcie à des températures de ≤100°C, pour donner un apprêt bicouche constitué d'un revêtement de peinture par électrodéposition et d'un revêtement d'hydroprimaire conducteur de l'électricité sur les parties métalliques et un apprêt monocouche constitué d'un revêtement d'hydroprimaire conducteur de l'électricité sur les parties en matière plastique ;
    3.2) la carrosserie ou l'habitacle en métal-matière plastique intégrés ainsi que leurs pièces de rechange ou pièces de construction, dont les parties en matière plastique comportent un apprêt à base d'un revêtement d'hydroprimaire (variante 2.2) étant revêtus uniquement d'un hydroprimaire clair et la couche d'hydroprimaire clair résultante étant complètement durcie à des températures de ≤100°C, pour donner sur les parties en matière plastique un apprêt bicouche constitué d'un revêtement d'hydroprimaire conducteur de l'électricité et d'un revêtement d'hydroprimaire clair, et sur les parties métalliques un apprêt bicouche constitué d'un revêtement de peinture par électrodéposition et d'un revêtement d'hydroprimaire clair ;
    ou
    3.3) la carrosserie ou l'habitacle en métal-matière plastique intégrés ainsi que leurs pièces de rechange ou pièces de construction, dont les parties en matière plastique comportent une couche d'hydroprimaire conducteur de l'électricité ayant commençé à sécher (variante 2.3) étant revêtus uniquement et en ce qui concerne les parties en matière plastique, par un processus humide-sur-humide, d'un hydroprimaire clair, à la suite de quoi la couche d'hydroprimaire conducteur de l'électricité et la couche d'hydroprimaire clair sont complètement durcies ensemble à des températures de ≤100°C, pour donner sur les parties en matière plastique un apprêt bicouche constitué d'un revêtement d'hydroprimaire conducteur de l'électricité et d'un revêtement d'hydroprimaire clair, et sur les parties métalliques un apprêt bicouche constitué d'un revêtement de peinture par électrodéposition et d'un revêtement d'hydroprimaire clair ;
    4) on applique sur les apprêts uniquement une peinture de base à l'eau, colorante et/ou à effet et on commence à faire sécher, sans la faire durcir complètement, la couche résultante de peinture de base à l'eau, puis
    5) on applique au moins un vernis à deux composants, dans un processus humide-sur-humide, sur la couche de peinture de base à l'eau ayant commencé à sécher, d'où il résulte au moins une couche de vernis ; et
    6) la couche de peinture de base à l'eau ayant commencé à sécher et l'au moins une couche de vernis sont durcies ensemble thermiquement ou thermiquement avec un rayonnement actinique, à des températures de ≤100°C, d'où il résulte le revêtement de peinture multicouche colorant et/ou à effet.
  2. Procédé selon la revendication 1, caractérisé en ce que dans l'étape (2) du procédé on place les parties métalliques, peintes par électrodéposition, de la carrosserie ou de l'habitacle et/ou de leurs pièces de rechange ou pièces de construction sur une plate-forme de montage, sur laquelle les parties en matière plastique de la carrosserie ou de l'habitacle sont positionnées en étant ajustées précisément.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, dans l'étape (3.1) du procédé
    (3.1.1) on applique un hydroprimaire clair uniquement sur le revêtement d'hydroprimaire conducteur de l'électricité, durci, et la couche d'hydroprimaire clair résultante est durcie thermiquement à des températures de ≤100°C
    ou
    (3.1.2) on commence à faire sécher, sans la faire durcir complètement, la couche d'hydroprimaire conducteur de l'électricité, après son application, on applique un hydroprimaire clair, dans le processus humide-sur-humide, sur la couche d'hydroprimaire conducteur de l'électricité ayant commencé à sécher, à la suite de quoi on fait durcir complètement ensemble la couche d'hydroprimaire conducteur de l'électricité. et la couche d'hydroprimaire claire résultante,
    d'où il résulte, selon les deux variantes sur les parties métalliques un apprêt tricouche constitué de revêtement de peinture par électrodéposition, revêtement d'hydroprimaire conducteur de l'électricité et revêtement d'hydroprimaire clair et, sur les pièces en matière plastique, un apprêt bicouche constitué de revêtement d'hydroprimaire conducteur de l'électricité et revêtement d'hydroprimaire clair.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'on utilise une peinture pour électrodéposition apte au dépôt cathodique sans plomb, à base d'au moins un adduit époxyde-amine.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'hydroprimaire conducteur de l'électricité contient un composant I, contenant au moins une dispersion aqueuse de polyuréthanne et au moins un pigment conducteur de l'électricité, et au moins un composant II contenant au moins un polyisocyanate.
  6. Procédé selon la revendication 5, caractérisé en ce qu'on utilise comme pigment conducteur de l'électricité du noir de carbone.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'hydroprimaire clair contient un composant I contenant au moins un liant contenant des groupes hydroxy, dissous ou dispersé dans l'eau, et au moins un pigment clair, et un composant II, contenant au moins un polyisocyanate.
  8. Procédé selon la revendication 7, caractérisé en ce qu'on utilise comme liant contenant des groupes hydroxy au moins un polyester, un polyacrylate, un polyuréthanne, un polyester acryloylé et/ou un polyuréthanne acryloylé, en particulier un polyuréthanne.
  9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la peinture de base à l'eau contient au moins un liant contenant des groupes hydroxy, dissous ou dispersé dans l'eau et au moins un pigment colorant et/ou à effet.
  10. Procédé selon la revendication 9, caractérisé en ce que dans la peinture de base à l'eau on utilise en tant que liant contenant des groupes hydroxy au moins un polyuréthanne et/ou au moins un polyuréthanne acryloylé.
  11. Procédé selon la revendication 9 ou 10, caractérisé en ce que la peinture de base à l'eau contient encore en tant que liant(s) supplémentaire(s) au moins un polyacrylate contenant des groupes hydroxy, un polyester contenant des groupes hydroxy et/ou un polyester acryloylé contenant des groupes hydroxy.
  12. Procédé selon l'une quelconque des revendications 1 à 11, caractérisé en ce que la peinture de base à l'eau contient au moins un agent de réticulation.
  13. Procédé selon l'une quelconque des revendications 1 à 12, caractérisé en ce que le vernis à deux composants. contient un composant I et au moins un liant contenant des groupes hydroxy et un composant II comportant au moins un polyisocyanate.
  14. Procédé selon l'une quelconque des revendications 1 à 13, caractérisé en ce que le vernis à deux composants est durcissable thermiquement ou thermiquement avec un rayonnement actinique.
  15. Procédé selon l'une quelconque des revendications 1 à 14, caractérisé en ce que le vernis à deux composants durci est revêtu d'un revêtement transparent hautement résistant à la rayure.
  16. Revêtement intégré de peinture multicouche colorante et/ou à effet pour carrosseries ou habitacles de voitures de tourisme et de véhicules utilitaires ainsi que leurs pièces de rechange et pièces de construction, comportant des parties en matière plastique intégrées, qui comporte les couches suivantes superposées dans l'ordre indiqué :
    1) sur les parties métalliques un revêtement de peinture par électrodéposition appliqué par dépôt cathodique ou anodique, en particulier cathodique, et durci thermiquement, ainsi qu'un revêtement de primaire conducteur de l'électricité et/ou un revêtement d'hydroprimaire clair en tant qu'apprêt et
    2) sur les parties en matière plastique un revêtement d'hydroprimaire conducteur de l'électricité ou un revêtement de primaire conducteur de l'électricité et un revêtement d'hydroprimaire clair en tant qu'apprêt
    étant entendu que les carrosseries ou habitacles intégrés de voitures de tourisme et de véhicules utilitaires ainsi que leurs pièces de rechange et pièces de construction sont sur toute leur surface uniquement recouverts d'au moins un revêtement d'hydroprimaire :
    ainsi que
    3) sur l'apprêt des parties métalliques et des parties en matière plastique un revêtement de peinture de base colorante et/ou à effet et
    4) sur le revêtement de peinture de base au moins un revêtement de vernis.
  17. Revêtement intégré de peinture multicouche colorante et/ou à effet selon la revendication 16, caractérisé en ce qu'il est muni d'un revêtement (6) de vernis hautement résistant à la rayure.
  18. Carrosseries ou habitacles de voitures de tourisme et de véhicules utilitaires, ainsi que leurs pièces de rechange et pièces de construction, comportant des parties en matière plastique, contenant au moins un revêtement de peinture multicouche colorant et/ou à effet, pouvant être obtenu selon l'une quelconque des revendications 1 à 15, et/ou au moins un revêtement de peinture multicouche colorant et/ou à effet selon la revendication 16 ou 17.
EP00954653A 1999-09-16 2000-08-25 Procede de laquage integre pour carosseries ou cabines de voitures ou de vehicules utilitaires, comportant des parties synthetiques, ainsi que pour pieces de rechange et pieces rapportees, laquage selon ce procede et pieces laquees Expired - Lifetime EP1218112B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19944483 1999-09-16
DE19944483A DE19944483A1 (de) 1999-09-16 1999-09-16 Integriertes Lackierverfahren für Kunststoffteile enthaltende Karosserien oder Kabinen von PKW und Nutzfahrzeugen sowie deren Ersatzteile und Anbauteile
PCT/EP2000/008298 WO2001019531A2 (fr) 1999-09-16 2000-08-25 Procede de laquage integre pour carrosseries ou cabines de voitures ou de vehicules utilitaires, comportant des parties synthetiques, ainsi que pour pieces de rechange et pieces rapportees

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EP1218112A2 EP1218112A2 (fr) 2002-07-03
EP1218112B1 true EP1218112B1 (fr) 2004-01-02

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US (1) US6887526B1 (fr)
EP (1) EP1218112B1 (fr)
AT (1) ATE257042T1 (fr)
BR (1) BR0012845B1 (fr)
DE (2) DE19944483A1 (fr)
ES (1) ES2214303T3 (fr)
WO (1) WO2001019531A2 (fr)

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BR0012845B1 (pt) 2013-09-10
DE50004939D1 (de) 2004-02-05
EP1218112A2 (fr) 2002-07-03
BR0012845A (pt) 2002-04-30
WO2001019531A3 (fr) 2001-10-18
ES2214303T3 (es) 2004-09-16
WO2001019531A2 (fr) 2001-03-22
US6887526B1 (en) 2005-05-03
DE19944483A1 (de) 2001-03-29
ATE257042T1 (de) 2004-01-15

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