EP1691935B1 - Coating system for surface lacquering, forming a crackled lacquer and method for the production of said coating system - Google Patents

Coating system for surface lacquering, forming a crackled lacquer and method for the production of said coating system Download PDF

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Publication number
EP1691935B1
EP1691935B1 EP04804338A EP04804338A EP1691935B1 EP 1691935 B1 EP1691935 B1 EP 1691935B1 EP 04804338 A EP04804338 A EP 04804338A EP 04804338 A EP04804338 A EP 04804338A EP 1691935 B1 EP1691935 B1 EP 1691935B1
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EP
European Patent Office
Prior art keywords
coating system
coating
application
soluble
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP04804338A
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German (de)
French (fr)
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EP1691935A1 (en
Inventor
Roger KÖNIG
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.)
Konig Lackierfachbetrieb GmbH
KOENIG LACKIERFACHBETRIEB GmbH
Original Assignee
Konig Lackierfachbetrieb GmbH
KOENIG LACKIERFACHBETRIEB GmbH
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Publication date
Priority claimed from DE200410061172 external-priority patent/DE102004061172A1/en
Application filed by Konig Lackierfachbetrieb GmbH, KOENIG LACKIERFACHBETRIEB GmbH filed Critical Konig Lackierfachbetrieb GmbH
Publication of EP1691935A1 publication Critical patent/EP1691935A1/en
Application granted granted Critical
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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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/061—Special surface effect
    • B05D5/062—Wrinkled, cracked or ancient-looking effect
    • 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
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F9/00—Designs imitating natural patterns
    • B44F9/12—Designs imitating natural patterns of leather
    • 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
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/061—Special surface effect
    • 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
    • B05D7/54—No clear coat specified
    • B05D7/542—No clear coat specified the two layers being cured or baked together

Definitions

  • the invention relates to a method for processing a color and effect coating system which, after coating an object surface, forms a tear lacquer structure with a leather-like surface and a coating system for use with this method.
  • Water-soluble surface coating agents are already known whose surface has a tear-lacquer structure after curing.
  • a coating system is known in which on the surface of the coating object, a base coat is applied and on this after a drying but before the drying or curing of this base coat a top coat is applied.
  • the base coat consists of a more elastic coating system than the top coat.
  • the inelastic topcoat hardens more stress than the basecoat.
  • the faster-curing topcoat breaks down due to the lack of elasticity and forms a tear lacquer structure on the surface.
  • the curing properties of the coating systems used for the base or top coating are determined by the starting materials used.
  • the resin mixture of the basecoat preferably dries or cures slowly inelastically in an oxidative manner, while the resin mixture of the topcoat chemically reactively externally crosslinked or self-crosslinked dries or hardens.
  • drying or hardening it builds up in the forming a coating on the top coat, which then leads to cracking due to the difference in voltage to the base coat. This is followed by the formation of islands in the top coat which "float" on the base coat so that the desired tear paint pattern is formed.
  • binder resin for the base coat an alkyd resin curing under oxygen oxidation is preferably used after this solution.
  • Binder mixing systems such as alkyd resin / acrylate resin mixtures are also mentioned as being suitable in this solution. Cracking may be readily predetermined by use of appropriate waterborne binder systems for the basecoat, the cracking being determined, in particular, by the alkyd resin types used, on the one hand, and by the proportions of alkyd resin to acrylate resin or other polymer combinations in the dispersion mixture used.
  • the two-coat paint can be painted over as desired.
  • a method of producing a leather imitation surface ie, a tear lacquer surface.
  • a plurality of application layers are applied successively on a surface of a coating object.
  • the surface-applied primer layer must be subjected to a drying process before the application of an intermediate layer.
  • the drying of the primer layer is at least 20 minutes, depending on the effect of heat or under room temperature conditions up to one hour.
  • the primer layer which consists of a colored commercial basecoat, be provided with an intermediate layer of a plasticized cellulose-resin combination.
  • the primer layer and the intermediate layer are coordinated so that the primer layer is more elastic or softer than the intermediate layer.
  • the successively applied layers dry at room temperature. Due to the different shrinkage during drying of the primer layer and the intermediate layer, the intermediate layer breaks and a tear lacquer structure with a scarred, leather-like structure results.
  • the intermediate layer is provided after this solution with a cover layer of PUR paint, which must be subjected to a drying process.
  • the inelastic topcoat can be applied to the basecoat only after a certain reaction time, whereby only one coating can be done in temporally successive steps.
  • the object of the invention is to effectively use the processing of a coating system for a surface finish having a tear lacquer structure in the flow production of coating objects.
  • the object of the invention is to develop a method for processing a coating system having a tear lacquer structure and a leather-like surface on the basis of identical and / or different solvents for a surface finish and a coating system which can be used for this purpose.
  • a layered elasticity is generated by the fact that with a Wet-on-wet coating on a first elastic curing varnish application with any solvent a second coating with an inelastic thermosetting application system consisting of a low viscosity commercial glaze based on a water-soluble binder for wood sealing as an activator for the impact reaction with a brief warming or a flow Air of the second coating consisting of a glaze, takes place, wherein the existing of a glaze second, applied by spraying coating system di e boundary layer between the base coating and the second application system is destroyed and due to the known molecular motion in the forming mixing area influencing the base coating by the water-soluble glaze order slightly contained solvent-containing addition of a high boiler,
  • the advantage of the disclosed solution is that of a wet-in-wet coating with two water-soluble coating systems or with two applications based on different solvents between the solvents While the systems do not interfere, they do create a mixing zone that destroys the boundary layer of the basecoat that extends into both the basecoat and topcoats.
  • the basecoat application in a wet-on-wet coating with a second coating with a water-soluble application system an increasingly layered elasticity always forms on a first coating application based on any solvent. According to the invention, this results in a two-layered distribution of stress in the basecoat and the topcoat.
  • the desired tear lacquer structure is then created by influencing the kinematic toughness of the base coat.
  • An alternative to this method according to the invention is that just before processing, i. Before the coating of the object surface, all components are mixed for use as a basecoat application and as a glaze application and this mixture is then applied immediately to the object surface and subjected to the same heat treatment in the hot air stream for a short time at a flow temperature of not less than about 90 ° C. This also results in a tear lacquer structure on the coated surface. However, this has a tear lacquer structure, which is less accurate.
  • a water-soluble or a solvent-containing paint system is applied by the known technical means, for example, a water-soluble PUR paint system comprising a component with a binder of aliphatic polyurethane in dispersion and a mixed acrylate copolymer combination or two components having a pH is used in the almost neutral range between 7.8 to 8.0.
  • a second water-soluble coating order consisting of a commercially available glaze for wood sealing consisting of a combination of a low-viscosity binder dispersion of aliphatic polyurethane and an acrylate copolymer with an addition of a small amount of a made as a plasticizer known organic solvent of butyl glycol (C 4 H 10 O 2 ).
  • the glaze application can consist of a pigment mixture in aqueous dispersion with a pH of about 9.3, ie the glaze application reacts weakly alkaline.
  • This coating application of a commercial glaze contains a small proportion of an organic solvent of about 3%, a proportion of water of about 88.50% and a solids content of about 7.5 to 8.5%.
  • a mixing zone in which a molecular movement begins forms in the first coating application, which also extends into the interface region of the second coating from a glaze or PU coating application, this mixing zone having a film-like dimension has.
  • Suitable binders for the base coating may optionally be derivatives of natural oils, reaction products of both unsaturated and saturated acids and alcohols, synthetic resins as derivatives of phenols, urea, melamine, acrylic acid, styrene, ketones or aldehydes, of amines, of silicon and of terpene hydrocarbons, polyvinyl compounds, organometallic compounds, polyurethanes and polyureas, epoxy resins, nitrocellulose and cellulose compounds, rubber and derivatives thereof.
  • an order with a Softfeelinglack which is understood as such a paint, which is characterized by a special feel, ie grip done.
  • the soft feel effect is based essentially on a combination of braking and sliding action and consists mainly of a binder on a polyester / polyurthane base.
  • the odorant can with a soft paint application to the coating according to the invention with a tear-paint structure, which has a leather-like effect, they also assume a leather odor.
  • the effect coating can be carried out on a colored coating object or on a colored surface. If the coating is to be colored, it is possible to color the colorless feedstocks to the color of the coating object.
  • the process of the present invention achieves coating of a surface in a wet-on-wet process, i. without having to perform a necessary interruption for the purpose of drying the first coating before coating it with a second application.
  • this method according to the invention is less expensive than other known solutions for achieving a tear lacquer structure.
  • Another advantage in the solution according to the invention is that the coating with a tear lacquer structure against a caused by a pressure load slight deformation of the coating is insensitive or this deformation is reversible. By slightly heating the coating with this deformation, this deformation must be eliminated again.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Paints Or Removers (AREA)

Abstract

The problem of the invention, which is to develop a method for the processing of a cracked lacquer structure and a coating system having in a leather-like surface, is solved by the fact that a coating system is deposited in one layer on an object surface as a base lacquer application with an arbitrary binder, then a water-soluble glaze application as an activator is immediately deposited in the spraying process onto this deposited coating system in the wet state and the surface of the second coating comprising a glaze application is then subjected to a briefly acting thermal shock or an air flow in order to initiate the hardening of the coating system.

Description

Die Erfindung betrifft ein Verfahren zur Verarbeitung eines farb- und effektgebenden Beschichtungssystems, welches nach Beschichtung einer Objektoberfläche eine Reißlackstruktur mit einer lederähnlichen Oberfläche ausbildet, sowie ein Beschichtungssystem zur Verwendung mit diesem Verfahren.The invention relates to a method for processing a color and effect coating system which, after coating an object surface, forms a tear lacquer structure with a leather-like surface and a coating system for use with this method.

Es sind bereits wasserlösliche Oberflächenbeschichtungsmittel bekannt, deren Oberfläche nach Aushärtung eine Reißlackstruktur aufweist. Nach der DE 296 13 266 U1 ist ein Beschichtungssystem bekannt, bei dem auf der Oberfläche des Beschichtungsobjektes eine Grundbeschichtung aufgetragen wird und auf dieser nach einem Antrocknen aber vor dem Durchtrocknen bzw. Aushärten dieser Grundbeschichtung eine Deckbeschichtung aufgetragen wird. Die Grundbeschichtung besteht aus einem elastischeren Beschichtungssystem als die Deckbeschichtung. Die unelastischere Deckbeschichtung härtet spannungsreicher aus als die Grundbeschichtung. Die schneller aushärtende Deckbeschichtung reißt aufgrund der fehlenden Elastizität ein und bildet an der Oberfläche eine Reißlackstruktur aus.Water-soluble surface coating agents are already known whose surface has a tear-lacquer structure after curing. After DE 296 13 266 U1 a coating system is known in which on the surface of the coating object, a base coat is applied and on this after a drying but before the drying or curing of this base coat a top coat is applied. The base coat consists of a more elastic coating system than the top coat. The inelastic topcoat hardens more stress than the basecoat. The faster-curing topcoat breaks down due to the lack of elasticity and forms a tear lacquer structure on the surface.

Die Härtungseigenschaften der eingesetzten Beschichtungssysteme für die Grund- bzw. Deckbeschichtung werden durch die verwendeten Ausgangsstoffe bestimmt. Nach dieser bekannten Lösung trocknet bzw. härtet die Harzmischung der Grundbeschichtung bevorzugt in oxidativer Weise langsam unelastisch aus, während die Harzmischung der Deckschicht chemisch reaktiv fremdvernetzt oder selbstvernetzt trocknet bzw. härtet. Während der Trocknung bzw. Härtung baut sich in der sich bildenden Deckbeschichtung eine Spannung auf, die dann aufgrund des Spannungsunterschiedes zur Grundbeschichtung zur Rißbildung führt. Es folgt die Bildung von Inseln in der Deckbeschichtung, die auf der Grundbeschichtung "schwimmen", so daß die gewünschte Reißlackstruktur sich ausbildet.The curing properties of the coating systems used for the base or top coating are determined by the starting materials used. According to this known solution, the resin mixture of the basecoat preferably dries or cures slowly inelastically in an oxidative manner, while the resin mixture of the topcoat chemically reactively externally crosslinked or self-crosslinked dries or hardens. During drying or hardening it builds up in the forming a coating on the top coat, which then leads to cracking due to the difference in voltage to the base coat. This is followed by the formation of islands in the top coat which "float" on the base coat so that the desired tear paint pattern is formed.

Als Bindemittelharz für die Grundbeschichtung wird nach dieser Lösung vorzugsweise ein unter Sauerstoffoxidation härtendes Alkydharz eingesetzt. Auch Bindemittel-Mischsysteme wie Alkydharz/Acrylatharz-Mischungen werden in dieser Lösung als anwendbar genannt. Die Rißbildung kann durch Einsatz von entsprechenden Bindemittelsysteme auf Wasserbasis für die Grundbeschichtung leicht vorbestimmt beeinflußt werden, wobei die Rißbildung insbesondere durch die verwendeten Alkydharztypen einerseits sowie durch die eingesetzten Mengenverhältnisse von Alkydharz zu Acrylatharz oder andere Polymerkombinationen in der Dispersionsmischung bestimmt werden kann.As the binder resin for the base coat, an alkyd resin curing under oxygen oxidation is preferably used after this solution. Binder mixing systems such as alkyd resin / acrylate resin mixtures are also mentioned as being suitable in this solution. Cracking may be readily predetermined by use of appropriate waterborne binder systems for the basecoat, the cracking being determined, in particular, by the alkyd resin types used, on the one hand, and by the proportions of alkyd resin to acrylate resin or other polymer combinations in the dispersion mixture used.

Nach Aushärten der Systeme und Abschluß der Rißbildung, d. h. der Herstellung der Reißlackstruktur kann der zweischichtige Anstrich beliebig überlackiert werden.After curing of the systems and completion of the cracking, d. H. the production of the tear lacquer structure, the two-coat paint can be painted over as desired.

Diese bekanntgewordene Lösung hat den Nachteil, daß keine kontinuierlich ablaufende Beschichtung einer Oberfläche eines Beschichtungsobjektes in einem Arbeitsgang vorgenommen werden kann. Die aufgebrachte Grundbeschichtung ist nach dieser Lösung erst dann mit einer Deckbeschichtung belegbar, wenn die Grundbeschichtung bereits angetrocknet aber nicht durchgetrocknet ist. Zwischen dem Auftrag der Grundbeschichtung und dem der Deckbeschichtung müssen Abluftzeiten von mehreren Minuten bei einer Luftunterstützung eingehalten werden, damit die elastischere Grundbeschichtung, deren Bindmittel vorwiegend in oxidativer Weise langsam und elastisch aushärtet vor dem Auftrag der spannungsreicher härtenden Deckbeschichtung bereits angetrocknet aber noch nicht ausgehärtet ist.This has become known solution has the disadvantage that no continuous running coating a surface of a coating object can be made in one operation. After application of this solution, the applied primer coating can only be coated with a top coat if the base coat has already dried but not dried through. Exhaust air times of several minutes must be maintained between the application of the base coat and the top coat with an air support, so that the elastic base coat whose binder cures primarily oxidatively slowly and elastically before the application of the high-tension curing top coat already dried but not yet cured.

Hierdurch ergeben sich Verweilzeiten des mit einer Grundbeschichtung versehenen Beschichtungsobjektes, wobei darauf zu achten ist, daß die Temperatur und die relative Feuchtigkeit der Abluft eingehalten wird und die Verweildauer je nach dem eingestellten System für die Grundbeschichtung zeitlich limitiert ist. Hierdurch wird eine in eine Industrialisierung des Beschichtungsvorganges erheblich erschwert. Die Antrocknungszeit ist bei diesem zweischichtigen System erforderlich, damit die Deckbeschichtung nicht erheblich mit der Grundbeschichtung reagiert.This results in residence times of the provided with a primer coating object, it must be ensured that the temperature and the relative humidity of the exhaust air is maintained and the residence time is limited in time depending on the set system for the base coat. This will one in an industrialization of the coating process considerably more difficult. The drying time is required in this two-layer system so that the top coat does not react significantly with the base coat.

Nach der DE 102 22 116 A1 ist ein Verfahren zum Herstellen einer Lederimitatoberfläche, d.h. einer Reißlackoberfläche bekannt. Nach diesem Verfahren werden mehrere Auftragsschichten auf einer Oberfläche eines Beschichtungsobjektes nacheinander aufgebracht. Die auf der Oberfläche aufgebrachte Grundierungsschicht muß vor dem Auftrag einer Zwischenschicht einem Trocknungsvorgang unterzogen werden. Die Trocknung der Grundierungsschicht beträgt je nach Wärmeeinwirkung mindestens 20 Minuten oder unter Raumtemperaturverhältnissen bis zu einer Stunde. Frühestens nach einer Trocknungszeit von 20 Minuten kann die Grundierungsschicht, die aus einem eingefärbten handelsüblichen Grundlack besteht, mit einer Zwischenschicht aus einer plastifizierten Zellulose-Kunstharzkombination versehen werden. Nach dieser Lösung sind die Grundierungsschicht und die Zwischenschicht so aufeinander abgestimmt, daß die Grundierungsschicht elastischer bzw. weicher ist als die Zwischenschicht. Die nacheinander aufgebrachten Schichten trocknen bei Raumtemperatur. Durch die unterschiedliche Schrumpfung beim Trocknen von Grundierschicht und Zwischenschicht reißt die Zwischenschicht auf und es entsteht eine Reißlackstruktur mit einer narbigen, lederähnlichen Struktur. Die Zwischenschicht wird nach dieser Lösung mit einer Deckschicht aus PUR-Lack versehen, die einem Trocknungsprozeß unterzogen werden muß.After DE 102 22 116 A1 For example, there is known a method of producing a leather imitation surface, ie, a tear lacquer surface. According to this method, a plurality of application layers are applied successively on a surface of a coating object. The surface-applied primer layer must be subjected to a drying process before the application of an intermediate layer. The drying of the primer layer is at least 20 minutes, depending on the effect of heat or under room temperature conditions up to one hour. At the earliest after a drying time of 20 minutes, the primer layer, which consists of a colored commercial basecoat, be provided with an intermediate layer of a plasticized cellulose-resin combination. After this solution, the primer layer and the intermediate layer are coordinated so that the primer layer is more elastic or softer than the intermediate layer. The successively applied layers dry at room temperature. Due to the different shrinkage during drying of the primer layer and the intermediate layer, the intermediate layer breaks and a tear lacquer structure with a scarred, leather-like structure results. The intermediate layer is provided after this solution with a cover layer of PUR paint, which must be subjected to a drying process.

Dieser Lösung haftet der gleiche Mangel wie der Lehre nach der DE 296 13 266 U1 an. Die unelastischere Deckbeschichtung kann erst nach einer bestimmten Reaktionszeit auf die Grundbeschichtung aufgebracht werden, wodurch nur eine Beschichtung in zeitlich aufeinander folgenden Arbeitsschritten erfolgen kann.This solution has the same defect as the teaching of DE 296 13 266 U1 at. The inelastic topcoat can be applied to the basecoat only after a certain reaction time, whereby only one coating can be done in temporally successive steps.

Das Ziel der Erfindung besteht darin, die Verarbeitung eines Beschichtungssystems für eine Oberflächenlackierung, das eine Reißlackstruktur aufweist, effektiv in der Fließfertigung von Beschichtungsobjekten einzusetzen.The object of the invention is to effectively use the processing of a coating system for a surface finish having a tear lacquer structure in the flow production of coating objects.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Verarbeitung eines eine Reißlackstruktur und eine lederähnliche Oberfläche aufweisenden Beschichtungssystems auf der Basis von gleichen und/oder unterschiedlichen Lösungsmitteln für eine Oberflächenlackierung und ein hierfür einsetzbares Beschichtungssystem zu entwickeln.The object of the invention is to develop a method for processing a coating system having a tear lacquer structure and a leather-like surface on the basis of identical and / or different solvents for a surface finish and a coating system which can be used for this purpose.

Diese Aufgabe wird mit der in den unabhängigen Ansprüchen unter Einbeziehung der in den abhängigen Ansprüchen offenbarten technischen Lehre gelöst. Ausgehend von der bekannten Tatsache, daß sich eine Reißlackstruktur dann ausbildet, wenn zwei übereinander aufgebrachte Schichten von Lackierungen mit unterschiedlicher Elastizität getrennt aushärten können, wobei die Basisbeschichtung gegenüber der Deckschicht langsamer und damit elastischer aushärtet, wird erfindungsgemäß eine geschichtete Elastizität dadurch erzeugt, daß mit einer Naß-in-Naßbeschichtung auf einen ersten elastischer aushärtenden Lackauftrag mit einem beliebigen Lösungsmittel eine zweite Beschichtung mit einem unelastischer aushärtenden Auftragssystem, bestehend aus einer niedrigviskosen handelsüblichen Lasur auf der Basis eines wasserlöslichen Bindemittels zur Holzversiegelung als Aktivator zur Anstoßreaktion mit einer kurzzeitigen Erwärmung oder einer Beströmung mit Luft der aus einem Lasurauftrag bestehenden zweiten Beschichtung, erfolgt, wobei durch das aus einer Lasur bestehende zweite, im Spritzverfahren aufgetragene Beschichtungssystem die Grenzschicht zwischen der Basisbeschichtung und dem zweiten Auftragssystem zerstört wird und auf Grund der bekannten Molekularbewegung in dem sich ausbildenden Mischbereich eine Beeinflussung der Basisbeschichtung durch den im wasserlöslichen Lasurauftrag geringfügig enthaltenen lösungsmittelhaltigen Zusatz eines Hochsieders, wie das des starkhydrostopischen Butylclykols oder eines gleichwirkenden Zusatzes erfolgt und damit eine Verzögerung der Aushärtung des Basisbeschichtung bei gleichzeitiger Beschleunigung der Aushärtung der Deckbeschichtung erzeugt wird.This object is achieved by the technical teaching disclosed in the independent claims with the inclusion of the technical teaching disclosed in the dependent claims. Based on the known fact that a tear-paint structure forms when two superimposed layers of coatings with different elasticity can cure separately, the base coating with respect to the top layer slower and thus hardens elastic, according to the invention a layered elasticity is generated by the fact that with a Wet-on-wet coating on a first elastic curing varnish application with any solvent a second coating with an inelastic thermosetting application system consisting of a low viscosity commercial glaze based on a water-soluble binder for wood sealing as an activator for the impact reaction with a brief warming or a flow Air of the second coating consisting of a glaze, takes place, wherein the existing of a glaze second, applied by spraying coating system di e boundary layer between the base coating and the second application system is destroyed and due to the known molecular motion in the forming mixing area influencing the base coating by the water-soluble glaze order slightly contained solvent-containing addition of a high boiler, such as the strong hydrostopic Butylclykols or an equivalent additive and thus a delay in the cure of the basecoat is generated while accelerating the cure of the topcoat.

Erfindungsgemäß wird bei der offenbarten Lösung der Vorteil genutzt, daß einer Naß-in-Naßbeschichtung mit zwei wasserlöslichen Beschichtungssystemen oder mit zwei Aufträgen auf der Basis unterschiedlicher Lösungsmittel zwischen den Lösungsmitteln der Systeme zwar keine Beeinflussung eintritt, sich aber eine Mischzone unter Zerstörung der Grenzschicht der Basisbeschichtung, die sich in den sowohl in den Basislackauftrag als auch in die Deckbeschichtung erstreckt, einstellt. Dadurch bildet sich in dem Basislackauftrag bei einer Naß-in-Naßbeschichtung mit einer zweiten Beschichtung mit einem wasserlöslichen Auftragssystem auf einem ersten Lackauftrag auf der Basis eines beliebigen Lösungsmittels immer eine verstärkt geschichtete Elastizität aus. Erfindungsgemäß wird hierdurch in der Basisbeschichtung und der Deckschicht eine zweischichtige Spannungsverteilung erwirkt. Die angestrebte Reißlackstruktur entsteht dann durch Beeinflussung der kinematischen Zähigkeit der Basisbeschichtung.According to the invention, the advantage of the disclosed solution is that of a wet-in-wet coating with two water-soluble coating systems or with two applications based on different solvents between the solvents While the systems do not interfere, they do create a mixing zone that destroys the boundary layer of the basecoat that extends into both the basecoat and topcoats. As a result, in the basecoat application in a wet-on-wet coating with a second coating with a water-soluble application system, an increasingly layered elasticity always forms on a first coating application based on any solvent. According to the invention, this results in a two-layered distribution of stress in the basecoat and the topcoat. The desired tear lacquer structure is then created by influencing the kinematic toughness of the base coat.

Eine Alternative zu diesem Verfahren besteht erfindungsgemäß darin, daß kurz vor der Verarbeitung, d.h. vor der Beschichtung der Objektoberfläche alle Bestandteile für den Einsatz als Basislackauftrag und als Lasurauftrag gemischt werden und diese Mischung dann sofort auf die Objektoberfläche aufgetragen und der gleichen Wärmebehandlung im Warmluftstrom kurzzeitig bei einer Strömungstemperatur von nicht unter ca. 90° C unterzogen wird. Hierdurch ergibt sich gleichfalls eine Reißlackstruktur an der beschichteten Oberfläche. Diese besitzt allerdings eine Reißlackstruktur, die weniger exakt ausgebildet ist.An alternative to this method according to the invention is that just before processing, i. Before the coating of the object surface, all components are mixed for use as a basecoat application and as a glaze application and this mixture is then applied immediately to the object surface and subjected to the same heat treatment in the hot air stream for a short time at a flow temperature of not less than about 90 ° C. This also results in a tear lacquer structure on the coated surface. However, this has a tear lacquer structure, which is less accurate.

Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden.The invention will be explained in more detail using an exemplary embodiment.

Auf eine Oberfläche eines Beschichtungsobjektes wird ein wasserlösliches oder ein lösungsmittelhaltiges Lacksystem mit den bekannten technischen Mitteln aufgetragen, wobei beispielsweise ein wasserlösliches PUR-Lacksystem aus einer Komponente mit einem Bindemittel aus aliphatischem Polyurethan in Dispersion und einer beigemischten Acrylatcopolymer Kombination oder zwei Komponenten mit einem pH-Wert im fast neutralen Bereich zwischen 7,8 bis 8,0 eingesetzt wird.On a surface of a coating object, a water-soluble or a solvent-containing paint system is applied by the known technical means, for example, a water-soluble PUR paint system comprising a component with a binder of aliphatic polyurethane in dispersion and a mixed acrylate copolymer combination or two components having a pH is used in the almost neutral range between 7.8 to 8.0.

Auf diesen Lackauftrag wird sofort ein zweiter wasserlöslicher Beschichtungsauftrag, bestehend aus einer handelüblichen Lasur zur Holzversiegelung bestehend aus Kombination einer niedrigviskosen Bindemittel-Dispersion aus aliphatischem Polyurethan und einem Acrylatcopolymer mit einer Zugabe einer geringen Menge eines als Weichmacher bekannten organischen Lösungsmittels von Butylglykol (C4H10O2) vorgenommen. Der Lasurauftrag kann aus einem Pigment-Gemisch in wässriger Dispersion mit einem pH-Wert von ca. 9,3 bestehen, d.h. der Lasurauftrag reagiert schwach alkalisch. Dieser Beschichtungsauftrag aus einer handelüblichen Lasur enthält einen geringen Anteil eines organischen Lösungsmittel von ca. 3 %, einen Anteil von Wasser von ca. 88,50 % und einen Festkörpergehalt von ca. 7,5 bis 8,5 %. Nach dem Auftrag des zweiten Beschichtungsmittels im Spritzverfahren bildet sich im ersten Lackauftrag eine Mischzone, in der eine Molekularbewegung einsetzt, aus, die sich auch in den Grenzflächenbereich der zweiten Beschichtung aus einem Lasur- bzw. PUR-Lackauftrag erstreckt, wobei diese Mischzone eine filmähnliche Dimension besitzt. Durch eine kurzzeitige Erwärmung oder Beströmung mit Luft der zweiten Beschichtung wird die Aushärtung derselben angestoßen. Diese Grenzschicht reagiert gegenüber dem Basislackauftrag anders und es bildet sich die Reißlackstruktur aus.On this paint job immediately a second water-soluble coating order, consisting of a commercially available glaze for wood sealing consisting of a combination of a low-viscosity binder dispersion of aliphatic polyurethane and an acrylate copolymer with an addition of a small amount of a made as a plasticizer known organic solvent of butyl glycol (C 4 H 10 O 2 ). The glaze application can consist of a pigment mixture in aqueous dispersion with a pH of about 9.3, ie the glaze application reacts weakly alkaline. This coating application of a commercial glaze contains a small proportion of an organic solvent of about 3%, a proportion of water of about 88.50% and a solids content of about 7.5 to 8.5%. After the application of the second coating agent by spraying, a mixing zone in which a molecular movement begins forms in the first coating application, which also extends into the interface region of the second coating from a glaze or PU coating application, this mixing zone having a film-like dimension has. By briefly heating or flowing with air of the second coating, the curing of the same is initiated. This boundary layer reacts differently to the basecoat application and the tear lacquer structure is formed.

Als Bindemittel für die Basisbeschichtung können wahlweise Derivate von natürlichen Ölen, Reaktionsprodukte sowohl aus ungesättigten als auch aus gesättigten aus Säuren und Alkoholen, Kunstharzen als Derivate von Phenolen, des Hamstoffes, des Melamins, der Acrylsäure, des Styrols, von Ketonen bzw. von Aldehyden, von Aminen, von Silizium und von Terpenkohlenwasserstoffen, Polyvinylverbindungen, Organometallverbindungen, Polyurethane und Polyharnstoffe, Epoxidharze, Nitrocellulose- und Celluloseverbindungen, Kautschuk und deren Derivate eingesetzt werden.Suitable binders for the base coating may optionally be derivatives of natural oils, reaction products of both unsaturated and saturated acids and alcohols, synthetic resins as derivatives of phenols, urea, melamine, acrylic acid, styrene, ketones or aldehydes, of amines, of silicon and of terpene hydrocarbons, polyvinyl compounds, organometallic compounds, polyurethanes and polyureas, epoxy resins, nitrocellulose and cellulose compounds, rubber and derivatives thereof.

Nach Ausbildung der Reißlackstruktur in der Oberfläche der Beschichtung nach der Oberflächenbeschichtung eines Beschichtungsobjektes können weitere effektgebende Lackierungen vorgenommen werden. So kann beispielsweise ein Auftrag mit einem Softfeelinglack, worunter ein solcher Lack verstanden wird, der sich durch eine besondere Haptik, d.h. Griffigkeit auszeichnet, erfolgen. Der Softfeel-Effekt beruht dabei wesentlich auf einer Kombination von Brems- und Gleitwirkung und besteht vorwiegend aus einem Bindemittel auf einer Polyester/Polyurthan-Basis. Durch die Auflackierung eines Softlackes wird der beschichteten Oberfläche beim Anfassen/Berühren derselben bei der die Berührung vornehmenden Person der Eindruck, einen lederähnlichen Gegenstand zu berühren, vermittelt. Außerdem kann der Softlack mit einer einen Geruchsstoff absondernden flüssigen Substanz versetzt, bzw. imprägniert werden. Bei einer gezielten Auswahl des Geruchsstoffes kann mit einem Softlackauftrag auf die erfindungsgemäße Beschichtung mit einer Reißlackstruktur, die einen lederähnlichen Effekt aufweist, diese auch einen Ledergeruch, annehmen. Die effektgebende Lackierung kann auf einem farbigen Beschichtungsobjekt oder auf einem solchen mit einer farbigen Oberfläche vorgenommen werden. Sofern die Beschichtung farbig sein soll, besteht die Möglichkeit, die farblosen Einsatzmaterialien auf den Farbton des Beschichtungsobjektes abgestimmt einzufärben.After the development of the tear lacquer structure in the surface of the coating after the surface coating of a coating object, further effect-imparting lacquering can be carried out. Thus, for example, an order with a Softfeelinglack, which is understood as such a paint, which is characterized by a special feel, ie grip done. The soft feel effect is based essentially on a combination of braking and sliding action and consists mainly of a binder on a polyester / polyurthane base. By the lacquering of a soft lacquer, the coated surface, when touched / touched by it, becomes the impression of the person making the contact, to touch a leather-like object. In addition, the soft paint can be mixed or impregnated with an odorant-secreting liquid substance. In a targeted selection of the odorant can with a soft paint application to the coating according to the invention with a tear-paint structure, which has a leather-like effect, they also assume a leather odor. The effect coating can be carried out on a colored coating object or on a colored surface. If the coating is to be colored, it is possible to color the colorless feedstocks to the color of the coating object.

Mit dem erfindungsgemäßen Verfahren wird in einem Naß-in-Naß-Verfahren eine Beschichtung einer Oberfläche erreicht, d.h. ohne eine erforderliche Unterbrechung zwecks einer Antrocknung der ersten Beschichtung vor einer Beschichtung mit einem zweiten Auftrag realisieren zu müssen. Hierdurch ist dieses erfindungsgemäße Verfahren kostengünstiger als andere bekannte Lösungen zur Erzielung einer Reißlackstruktur.The process of the present invention achieves coating of a surface in a wet-on-wet process, i. without having to perform a necessary interruption for the purpose of drying the first coating before coating it with a second application. As a result, this method according to the invention is less expensive than other known solutions for achieving a tear lacquer structure.

Ein weiterer Vorteil in der erfindungsgemäßen Lösung besteht darin, daß die Beschichtung mit einer Reißlackstruktur gegenüber einer durch eine Druckbelastung hervorgerufenen geringfügigen Verformung der Beschichtung unempfindlich ist bzw. diese Verformung reversibel ist. Durch eine leichte Erwärmung der Beschichtung mit dieser Verformung ist diese Verformung wieder zu beseitigen.Another advantage in the solution according to the invention is that the coating with a tear lacquer structure against a caused by a pressure load slight deformation of the coating is insensitive or this deformation is reversible. By slightly heating the coating with this deformation, this deformation must be eliminated again.

Claims (17)

  1. Method for the processing of a water-soluble, color and effect giving coating system which forms a crinkle lacquer structure with a surface similar to leather after having carried out the coating of an object surface, characterized in that a water-soluble coating system is applied as a single-layer on the surface of an object as base coat application with a user-defined binding agent, and that immediately after that a water-soluble transparent paint is applied in a wet state on the applied coating system as activator in the spraying procedure and that after that on the surface of the second coating made of a transparent paint a short-term thermal shock is carried out in order to push the hardening of the coating system.
  2. Method for the processing of a water-soluble, color and effect giving coating system which forms a crinkle lacquer structure with a surface similar to leather after having carried out the coating of an object surface, characterized in that a water-soluble coating system is applied as a single-layer on the surface of an object as base coat application with a user-defined binding agent, and that immediately after that a water-soluble acrylate dispersion is applied in a wet state on the applied coating system as activator in the spaying procedure and that after that on the surface of the second coating made of an acrylate dispersion a short-term air flow with a low flow speed of the air is carried out in order to push the hardening of the coating system.
  3. Method for the processing of a water-soluble, color and effect giving coating system which forms a crinkle lacquer structure with a surface similar to leather after having carried out the coating of an object surface, characterized in that a water-soluble coating system made of a PUR lacquer with an addition of a water-soluble transparent paint or of a mixture of lacquer from a user-defined binding agent and an acrylate dispersion with an addition of a water-soluble transparent paint mixed immediately before the processing and applied on an object surface as a single layer and after that subjected to a short-term thermal shock.
  4. Method for the processing of a water-soluble, color and effect giving coating system which forms a crinkle lacquer structure with a surface similar to leather after having carried out the coating of an object surface, characterized in that a coating system containing a solvent is applied as single layer on an object surface as base coat application with a user-defined binding agent, and that immediately after that on the applied coating system a water-soluble transparent paint is applied in a wet state as activator in the in the spraying procedure and that after that on the surface of the second coating made of a transparent paint a short-term thermal shock is carried out in order to push the hardening of the coating system.
  5. Method for the processing of a water-soluble, color and effect giving coating system which forms a crinkle lacquer structure with a surface similar to leather after having carried out the coating of an object surface, characterized in that a coating system containing a solvent is applied as single layer on an object surface as base coat application made of a lacquer with a user-defined binding agent, and that immediately after that a water-soluble acrylate dispersion is applied in a wet state on the applied coating system as activator in the spaying procedure and that after that on the surface of the second coating made of an acrylate dispersion a short-term air flow with a low flow speed of the air is carried out in order to push the hardening of the coating system.
  6. Method according to the claims 1, 2, 4 and 5, characterized in that by the application of the second coating of the base paint application in the spraying procedure the barrier layer of the base paint application is mechanically destroyed and a mixing area ranging over the base paint application and the second coating is produced, wherein by the Brownian Molecular Motion in the mixing area and by the diffusion of a small part of the organic solution butylglycole or an addition of the same effect made of the transparent paint applied for the second coat, the kinematic viscosity in the sector of the mixing area the base paint application ranges over is reduced.
  7. Method according to the claim 3, characterized in that by the addition of a transparent paint containing a small part of the organic solution butylglycole or of an addition of the same effect immediately before the processing of a layered kinematic viscosity is produced through the Brownian Molecular Motion beginning immediately with the mixing inside the beginning of the coat application.
  8. Method according to the claims 1, 2, 4 and 5, characterized in that by the reduction of the surface tension in the area of the surface of the base paint application which is turned away from the object surface an area of different surface tension is produced.
  9. Method according to the claims 1, 3 and 4, characterized in that the thermal shock carried out over a time distance and with a temperature which depend on one hand from the thickness of the application of the base paint and on the other hand from the viscosity of the applied layers.
  10. Method according to the claims 1, 3 and 4, characterized in that the thermal exposure on the layered object surface is executed vertically and by means of a recirculation air flow.
  11. Method according to the claims 1, 3, 4 and 11, characterized in that the thermal treatment is carried out at a temperature over approx. 90° C over a time distance of approx. 5 seconds.
  12. Method according to one of the claims 1 to 5, characterized in that the coating system is applied on a colored object surface or on an object surface of a pigmented object, wherein the coating system available as clear lacquer is processed as pigmented.
  13. Method according to the claims 1 to 5, characterized in that the regulation of the viscosity of the coating system is executed by the addition of a solution.
  14. Method according to the claims 1 to 5, characterized in that after the application of a coat with a coating system designed with a crinkle lacquer structure on an existing surface designed with a crinkle lacquer structure another application with a lacquer coating giving effect to the surface is carried out.
  15. Method according to claim 2 and 4, characterized in that the flow on the coating system is carried out at a minimum of 0,4 bar.
  16. Coating system, equipped with a base paint application and an activator, in order to carry out a processing according to one of the claims 1 to 5, characterized in that the binding agent optionally comprises derivates from natural oils, reaction products from unsaturated or saturated acids and alcohols, synthetic resins as derivates from phenols, carbamide, melamine, acrylic acid, styrene, ketones or aldehydes, amines, silicium and from terpene carbon hydrides, polyvinyl compounds, organic metal compounds, polyurethanes and polycarbamides, epoxy resins, nitrocellulose and cellulose compounds, caoutchouc and their derivates.
  17. Coating system, comprising a base paint application, a binding agent and an activator, according to one of the claims 1 to 5, characterized in that the base paint application has an almost neutral pH-value between approx. 7,8 and 8,0.
EP04804338A 2003-12-18 2004-12-17 Coating system for surface lacquering, forming a crackled lacquer and method for the production of said coating system Not-in-force EP1691935B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10359861 2003-12-18
DE102004003252 2004-01-21
DE200410061172 DE102004061172A1 (en) 2004-12-16 2004-12-16 Method for producing lacquered finish on surface involves application of water-soluble coating system in single layer to surface of object, followed by application of water-soluble scumble to first coat and hardening by thermal shock
PCT/EP2004/014749 WO2005058513A1 (en) 2003-12-18 2004-12-17 Coating system for surface lacquering, forming a crackled lacquer and method for the production of said coating system

Publications (2)

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EP1691935A1 EP1691935A1 (en) 2006-08-23
EP1691935B1 true EP1691935B1 (en) 2009-03-04

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US (1) US20070298179A1 (en)
EP (1) EP1691935B1 (en)
AT (1) ATE424261T1 (en)
DE (1) DE502004009100D1 (en)
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WO (1) WO2005058513A1 (en)

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CN103625033A (en) * 2013-11-25 2014-03-12 常熟华冶薄板有限公司 Ultraviolet-curable crackle paint color-precoated steel plate and preparation method thereof
CN104689967A (en) * 2015-02-04 2015-06-10 安徽永昌金属制品有限公司 Zapon lacquer spraying technology for cast aluminium alloy part
CN115722429B (en) 2022-12-15 2023-07-25 紫荆花涂料（上海）有限公司 Controllable crack coating and preparation method thereof

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US2612456A (en) * 1948-07-29 1952-09-30 Ncr Co Process for applying an ornamental and protective crackle coating to a base
US2866720A (en) * 1955-10-24 1958-12-30 American Marietta Co Decorative coating and method of making same
US5601876A (en) * 1993-12-15 1997-02-11 Alternative Materials Technology, Inc. Water based crackle finish and a method for application thereof
DE29613266U1 (en) * 1996-07-31 1996-12-19 Dyrup Deutschland GmbH, 41199 Mönchengladbach Tear varnish
US7273651B1 (en) * 2000-08-15 2007-09-25 Wilde Rose Z Crackle finish
JP2003012748A (en) * 2001-06-28 2003-01-15 Daicel Chem Ind Ltd Water-base ultraviolet absorbing resin emulsion, method for producing the same and emulsion resin composition

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ATE424261T1 (en) 2009-03-15
US20070298179A1 (en) 2007-12-27
WO2005058513A1 (en) 2005-06-30
DE502004009100D1 (en) 2009-04-16
ES2323590T3 (en) 2009-07-21

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