EP1611228B1 - Method for surface-metallizing wax objects, especially for silver-plating candles to give them a bright de luxe shine - Google Patents

Method for surface-metallizing wax objects, especially for silver-plating candles to give them a bright de luxe shine Download PDF

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Publication number
EP1611228B1
EP1611228B1 EP04717599A EP04717599A EP1611228B1 EP 1611228 B1 EP1611228 B1 EP 1611228B1 EP 04717599 A EP04717599 A EP 04717599A EP 04717599 A EP04717599 A EP 04717599A EP 1611228 B1 EP1611228 B1 EP 1611228B1
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EP
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Prior art keywords
solution
primer
metallisation
silver
coat
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EP04717599A
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German (de)
French (fr)
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EP1611228A1 (en
Inventor
Stefan Kaiser
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Kaiser Lacke GmbH
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Kaiser Lacke GmbH
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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
    • C11C5/00—Candles
    • C11C5/008—Candles characterised by their form; Composite candles, e.g. candles containing zones of different composition, inclusions, or the like

Definitions

  • the invention relates to a process for the surface metallization of wax articles and in particular for the mirror-like silvering of candles.
  • the present invention seeks to provide a method for surface metallization of wax articles, in particular for mirror-silvering of candles, which is feasible with a comparable decor quality more rational and with significantly less equipment.
  • a base coat on the surface of the wax article to be refined, all types of, for example, unpainted candles can be surface-finished.
  • the base coat prepares the substrate for the metallization and in particular allows wetting. It also ensures good adhesion to the article surface.
  • the presensitization solution is used to ensure wetting of the substrate surface for the further wet chemical preparation steps and the subsequent metallization process. This improves the adhesion of the metallization layer to the substrate. This can be further improved by the preferred use of multiple presensitization solutions.
  • the actual metallization of the article surface then takes place by the application of a metallization solution which deposits a metallization layer.
  • a metallization solution which deposits a metallization layer.
  • This is preferably done by spraying a two-component, a reducing solution and a metallizing solution made composite spray solution.
  • the components are preferably mixed in the nozzle head of a spraying device directly during the spraying, the precipitation of the metallizing particles taking place during the spraying process.
  • a thin, highly reflective layer is formed.
  • the reduction solution is based on modified saccharides, in the case of silver plating the metallization solutions are those which mainly contain silver diamine nitrate and ammonium hydroxide and sodium hydroxide. In small amounts of conventional stabilizing additives are added.
  • the topcoat layer applied to the metallization layer protects the metallization against corrosion, in particular yellowing or blackening. It is also possible to produce a coloring of the mirror decoration or a glossy or matt design of the surface structure via the transparent topcoat layer. This allows the design to achieve a variety of design options for surface-metallized wax articles.
  • the topcoat is preferably composed of one or more binder dispersions based on polyurethane, polyester and / or polyacrylate. Furthermore, defoaming agents may be added to the topcoat as well as the basecoat to ensure complete bursting of any air bubbles resulting from the immersion of the wax articles into corresponding paint baths during the course of the finish of the article.
  • a base coat of the following composition is applied by immersing the candles: component Type Quantity g -1 Polyester polyol CEL softener 1.93 L2 resin binder 15.83 Eastman CAB 553-0.4 binder 5.37 1-methoxy-2 solvent 7.37 Ethanol 99% solvent 67.78 acetone solvent 0.48 Efka - 2038 defoamers 0.50 Addid 131 Gradient and wetting agent 0.74 ⁇ basecoat 100.00
  • This basecoat is 76.48%, its solids content 23.52%. It is set to a viscosity of 15 s in the 4 mm DIN cup at 20 ° C. The fullness and luster of this base coat are decisive for the quality of the subsequent silvering and its brilliance.
  • the through-drying can take place, for example, at room temperature in a suspended state over a period of at least 12 hours, that is to say overnight, for example.
  • the first presensitization solution contains mainly modified saccharides and small amounts of regulatory additives present in an acidic, concentrated mixture. These presensitization solutions are available from Spraylat Corp. NT. Vernon, NY, USA and Aachen, Germany, under the name TL-30 and sold by the applicant under the item number 1275 1. This watery, clear, yellow-brown liquid is completely soluble in water and is acidic.
  • the first presensitization solution should be used in a 1: 9 dilution with deionized water.
  • the basecoated candles should be dipped into the presensitization solution and then rinsed with deionized water.
  • a second presensitization solution containing mainly tin-halogen compounds and hydrochloric acid is applied. It is an aqueous, clear, colorless to slightly yellowish liquid that smells pungent and is completely soluble in water. This second presensitization solution serves to optimize the adhesion of the silver layer to the base coat layer.
  • the second presensitization solution is used at a high dilution, for example one liter of deionized water is added to one milliliter of this solution.
  • the Vorsensibilmaschinest 2 is sold by the company Spraylat under the name "SCS" or by the applicant under the number 1275 2.
  • Starting solutions are an acidic reduction solution containing mainly modified saccharides and small amounts of additives, and a silver solution consisting of two separate base solutions.
  • the reducing solution is sold by the company Spraylat under the name "BKR-5" or by the applicant under the number 1275 3. It has a pH (at 22 ° C) of about 0.5 to 1.0 and is a watery, clear, slightly pinkish liquid.
  • the first base solution which actually contains the silver, contains silver diamine nitrate, ammonium hydroxide and small amounts of stabilizing additives. It is an aqueous, clear, blue liquid that smells strongly ammoniacal. It is completely soluble in water. Its pH is about 11 to 12 at 22 ° C.
  • This base solution is mixed in equal parts by volume with the second base solution containing sodium hydroxide, ammonium hydroxide and small amounts of stabilizing additives. It is an aqueous, clear, slightly greenish liquid whose odor is also ammoniacal. Its pH is about 13 at 22 ° C.
  • This second base solution is essentially a reaction accelerator solution, whereby the reaction rate can be increased by increased addition.
  • the two silver solutions are sold under the names "BKA-5" and "BKS-5" by the company Spraylat or under the numbers 1275 4 and 1275 5 by the applicant.
  • the reducing solution, on the one hand, and the silver solution consisting of the two aforementioned base solutions, on the other hand, are each filled into separate pressure vessels of a spraying device in whose nozzle head the two solutions are mixed immediately before spraying.
  • the precipitation of the silver particles takes place during the spray path from the nozzle head to the surface to be mirrored.
  • the injection period is about 10 to 15 seconds until a fully silvered surface is achieved by forming a continuous silver layer.
  • the spray pressure is about 2 bar, with the mixing nozzle head has a 1-mm nozzle.
  • the metallizing solution After immersing the primed candles in the Vorsensibilmaschinesssenen and after spraying the metallizing solution is rinsed in each case with deionized water by spraying.
  • This water rinse is carried out with a cup spray gun or a spray gun with pressure vessel, with a nozzle size of 1.8 mm is used.
  • the candles After applying the metallization layer, the candles are dried for at least four hours, but the painting process should be completed after 24 hours.
  • a transparent topcoat is applied, which serves to protect the silvering of corrosion, ie yellowing or blackening.
  • the painting is done again in the immersion process, the final drying takes place under ambient conditions or can be abbreviated by heat support.
  • the finish of the candle can still be varied to the effect that the mirror layer is colored. Furthermore, a matting can take place.
  • compositions of various topcoats - Top coat glossy component FK ⁇ % -1 Type Quantity g -1 Halwedrol OX 87/40 W 40.0 binder dispersion 773.00 (PURE) Joncryl95 30.0 binder dispersion 200.00 (PA) Tafigel PUR 40 -Lsg. 20.0 thickener 5.00 Surfynol DF-66 49.0 defoamers 5.40 Wasserdeion.
  • the viscosities of the above-mentioned topcoats are adjusted to 27 seconds in a 4 mm DIN cup at 20 ° C. Each coloration is carried out by adding 10% solutions of the respective dyes in 1-Metoxipropanol-2. Subsequently, the viscosity is adjusted to 13 seconds in the 4 mm DIN cup by adding deionized water.
  • the topcoat is composed of one or more binder dispersions in a mixture based on polyurethane, polyester and / or polyacrylate.
  • the binders show little or no yellowing when stored under standard conditions.
  • a matted topcoat additionally contains one or more matting agents, which can be composed of different classes of compounds.
  • the solids content of the topcoat can be lowered.
  • Suitable wetting agents ensure adequate wetting of the silver layer by the topcoat.
  • the envisaged defoaming agents accomplish a complete bursting of all air bubbles generated by the immersion of the silvered candles in the topcoat during the course of the paint from the candle.
  • the topcoat By the topcoat, the access of oxygen to the silver layer is largely prevented, which brings the desired corrosion protection with it. Thus, a loss of gloss (the so-called “tarnishing") of the silver layer is avoided.
  • the dried paint film also ensures sufficient burning of the candle, d. H. he does not tear when burning the candle, it does not cause pollution of the fire dish and is not flammable itself.
  • the dried paint film is further characterized by a sufficient under normal storage conditions (below 35 ° C and 80 ° C relative humidity) sufficient water resistance, d. H. it does not detach itself and can not be removed without significant shearing forces parallel to the paint surface.

Abstract

The invention relates to a method for surface-metallizing wax objects, especially for silver-plating candles to give them a bright de luxe shine. The inventive method comprises the steps of applying a base coat to the surface of the object to be finished, drying the base coat, treating the surface of the base coat layer with a presensitizing solution, applying a solution containing a metallization agent to the presensitized surface of the base coat layer while depositing a metallization layer, drying the metallization layer so produced, applying a transparent coating varnish and drying the coating varnish layer so produced.

Description

Die Erfindung betrifft ein Verfahren zum Oberflächenmetallisieren von Wachsartikeln und insbesondere zum spiegelglänzenden Versilbern von Kerzen.The invention relates to a process for the surface metallization of wax articles and in particular for the mirror-like silvering of candles.

Aus der EP 0 308 921 B1 ist ein Verfahren zur Herstellung von Zierkerzen mit einem metallischen Oberflächendekor bekannt, bei dem eine Wachskerze mit einem Alkohol lackiert und anschließend unter Vakuum metallisiert wird. Um eine möglichst gleichmäßige und haltbare Metallisierung zu erzeugen, soll zwischen dem Lackieren und Metallisieren ein Alterungsprozess von mindestens 60 Stunden vorgenommen werden. Dies bedeutet, dass im Produktionsablauf der Kerzen ein zeitaufwändiger Lagerschritt vorzusehen ist, für den darüber hinaus entsprechender Raum zur Verfügung stehen muss. Ferner ist bei dem bekannten Verfahren von Nachteil, dass eine nur aufwändig zu betreibende und im Produktionsdurchsatz begrenzte Vakuumbedampfungsanlage zum Einsatz kommt. Dies macht die Herstellung solcher Zierkerzen extrem kostenaufwändig.From EP 0 308 921 B1 a method for the production of decorative candles with a metallic surface decor is known in which a wax candle is painted with an alcohol and then metallized under vacuum. In order to produce the most uniform and durable metallization, an aging process of at least 60 hours should be carried out between painting and metallizing. This means that in the production process of the candles a time-consuming storage step is provided, for which moreover the corresponding space must be available. Furthermore, in the known method of disadvantage that only laborious to be operated and limited in production throughput Vakuumbedampfungsanlage is used. This makes the manufacture of such decorative candles extremely expensive.

Ausgehend von den geschilderten Problemen des Standes der Technik liegt der Erfindung die Aufgabe zugrunde, ein Verfahren zum Oberflächenmetallisieren von Wachsartikeln, insbesondere zum spiegelglänzenden Versilbern von Kerzen anzugeben, das bei vergleichbarer Dekorqualität rationeller und mit erheblich geringerem apparativen Aufwand durchführbar ist.Based on the described problems of the prior art, the present invention seeks to provide a method for surface metallization of wax articles, in particular for mirror-silvering of candles, which is feasible with a comparable decor quality more rational and with significantly less equipment.

Diese Aufgabe wird durch die im Kennzeichnungsteil des Anspruches 1 angegebenen Verfahrensschritte wie folgt gelöst:

  • Auftragen eines Grundlackes auf die zu veredelnde Oberfläche des Artikels,
  • Trocknen des Grundlackes,
  • Behandeln der Oberfläche der Grundlackschicht mit einer Vorsensibilisierungslösung,
  • Auftragen einer ein Metallisierungsmittel enthaltenden Lösung auf die vorsensibilisierte Oberfläche der Grundlackschicht unter Abscheidung einer Metallisierungsschicht,
  • Abtrocknen der gebildeten Metallisierungsschicht,
  • Auftragen eines transparenten Decklackes und
  • Trocknen der gebildeten Decklackschicht.
This object is achieved by the method steps indicated in the characterizing part of claim 1 as follows:
  • Applying a base coat to the surface of the article to be finished,
  • Drying the basecoat,
  • Treating the surface of the base coat layer with a presensitization solution,
  • Applying a metallization-containing solution to the presensitized surface of the base coat layer to deposit a metallization layer,
  • Drying the formed metallization layer,
  • Apply a transparent topcoat and
  • Drying of the formed topcoat layer.

Durch das Auftragen eines Grundlackes auf die zu veredelnde Oberfläche des Wachsartikels können alle Arten beispielsweise nicht lackierter Kerzen oberflächenveredelt werden. Der Grundlack bereitet den Untergrund für die Metallisierung vor und ermöglicht insbesondere eine Benetzung. Ferner sorgt er für eine gute Anhaftung an der Artikeloberfläche.By applying a base coat on the surface of the wax article to be refined, all types of, for example, unpainted candles can be surface-finished. The base coat prepares the substrate for the metallization and in particular allows wetting. It also ensures good adhesion to the article surface.

Die Vorsensibilisierungslösung wird verwendet, um eine Benetzung der Substratoberfläche für die weiteren nass-chemischen Vorbereitungsschritte und den anschließenden Metallisierungsprozess zu gewährleisten. Damit wird die Haftung der Metallisierungsschicht zum Substrat verbessert. Dies kann durch die bevorzugte Verwendung mehrerer Vorsensibilisierungslösungen noch verbessert werden.The presensitization solution is used to ensure wetting of the substrate surface for the further wet chemical preparation steps and the subsequent metallization process. This improves the adhesion of the metallization layer to the substrate. This can be further improved by the preferred use of multiple presensitization solutions.

Die eigentliche Metallisierung der Artikeloberfläche erfolgt anschließend durch das Auftragen einer Metallisierungslösung, die eine Metallisierungsschicht abscheidet. Dies wird vorzugsweise durch Aufsprühen einer zweikomponentigen, aus einer Reduktionslösung und einer Metallisierungslösung zusammengesetzten Sprühlösung vorgenommen. Die Komponenten werden dabei bevorzugtermaßen im Düsenkopf einer Sprüheinrichtung unmittelbar bei dem Aufsprühen gemischt, wobei die Fällung der Metallisierungspartikel während des Sprühvorgangs stattfindet. Es wird eine dünne, hochreflektierende Schicht gebildet. Die Reduktionslösung basiert auf modifizierten Sacchariden, bei den Metallisierungslösungen handelt es sich im Falle einer Versilberung um solche, die hauptsächlich Silberdiaminnitrat und Ammoniumhydroxid und Natriumhydroxid enthalten. In geringen Mengen sind übliche stabilisierende Additive zugegeben.The actual metallization of the article surface then takes place by the application of a metallization solution which deposits a metallization layer. This is preferably done by spraying a two-component, a reducing solution and a metallizing solution made composite spray solution. The components are preferably mixed in the nozzle head of a spraying device directly during the spraying, the precipitation of the metallizing particles taking place during the spraying process. A thin, highly reflective layer is formed. The reduction solution is based on modified saccharides, in the case of silver plating the metallization solutions are those which mainly contain silver diamine nitrate and ammonium hydroxide and sodium hydroxide. In small amounts of conventional stabilizing additives are added.

Durch die auf die Metallisierungsschicht aufgetragene Decklackschicht wird die Metallisierung vor Korrosion, insbesondere Vergilbung oder Schwärzung geschützt. Auch kann über die transparente Decklackschicht eine Farbgebung des Spiegeldekors bzw. eine glänzende oder matte Auslegung der Oberflächenstruktur hergestellt werden. Damit lassen sich im Aussehen vielfältige Designmöglichkeiten bei oberflächenmetallisierten Wachsartikeln erzielen.The topcoat layer applied to the metallization layer protects the metallization against corrosion, in particular yellowing or blackening. It is also possible to produce a coloring of the mirror decoration or a glossy or matt design of the surface structure via the transparent topcoat layer. This allows the design to achieve a variety of design options for surface-metallized wax articles.

Der Decklack setzt sich vorzugsweise zusammen aus einer oder mehreren Bindemitteldispersionen auf der Basis von Polyurethan, Polyester und/oder Polyacrylat. Ferner können dem Decklack wie dem Grundlack Entschäumungsmittel zugesetzt sein, um ein vollständiges Aufplatzen aller durch beim Tauchen der Wachsartikel in entsprechende Lackbäder entstehenden Luftblasen während des Ablaufens des Lacks vom Artikel zu gewährleisten.The topcoat is preferably composed of one or more binder dispersions based on polyurethane, polyester and / or polyacrylate. Furthermore, defoaming agents may be added to the topcoat as well as the basecoat to ensure complete bursting of any air bubbles resulting from the immersion of the wax articles into corresponding paint baths during the course of the finish of the article.

Weitere Merkmale, Einzelheiten und Vorteile des erfindungsgemäßen Verfahrens ergeben sich aus den nachfolgend beschriebenenFurther features, details and advantages of the method according to the invention will become apparent from the following

Ausführungsbeispiel:Embodiment:

Es wird ein Veredelungsverfahren für alle Arten nicht lackierter Kerzen beschrieben, die mit einer spiegelglänzenden Silberschicht versehen werden.It describes a refining process for all types of unpainted candles, which are provided with a mirror-finished silver layer.

In einem ersten Verfahrensschritt wird ein Grundlack folgender Zusammensetzung durch Eintauchen der Kerzen aufgebracht: Komponente Typ Menge g-1 Polyesterpolyol CEL Weichmacher 1,93 L2 Harz Bindemittel 15,83 Eastman CAB 553-0,4 Bindemittel 5,37 1-Methoxypropanol-2 Lösungsmittel 7,37 Ethanol 99% Lösungsmittel 67,78 Aceton Lösungsmittel 0,48 Efka - 2038 Entschäumer 0,50 Addid 131 Verlaufs- und Benetzungsmittel 0,74 Σ Grundlack 100,00 In a first process step, a base coat of the following composition is applied by immersing the candles: component Type Quantity g -1 Polyester polyol CEL softener 1.93 L2 resin binder 15.83 Eastman CAB 553-0.4 binder 5.37 1-methoxy-2 solvent 7.37 Ethanol 99% solvent 67.78 acetone solvent 0.48 Efka - 2038 defoamers 0.50 Addid 131 Gradient and wetting agent 0.74 Σ basecoat 100.00

Der Lösungsmittelanteil dieses Grundlackes beträgt 76,48 %, sein Festkörperanteil 23,52 %. Er ist auf eine Viskosität von 15 s im 4 mm-DIN-Becher bei 20° C eingestellt. Fülle und Glanz dieses Grundlackes sind für die Qualität der späteren Versilberung und deren Glanz aufschlaggebend.The solvent content of this basecoat is 76.48%, its solids content 23.52%. It is set to a viscosity of 15 s in the 4 mm DIN cup at 20 ° C. The fullness and luster of this base coat are decisive for the quality of the subsequent silvering and its brilliance.

Bei dem von Hand oder maschinell durchgeführten Tauchlackierverfahren wird nach dem Ablaufen des Lackes der verbleibende Resttropfen am Fuß der Kerze abgetupft. Danach ist eine vollkommene Durchtrocknung des Lackfilms auch am Boden der Kerze vorzunehmen. Die Durchtrocknung kann beispielsweise bei Raumtemperatur in hängendem Zustand über einen Zeitraum von mindestens 12 Stunden, also beispielsweise über Nacht, erfolgen.In the case of the dip painting process carried out by hand or by machine, after the lacquer has drained off, the residual drop remaining at the base of the candle is dabbed off. Thereafter, a complete drying of the paint film is also carried out at the bottom of the candle. The through-drying can take place, for example, at room temperature in a suspended state over a period of at least 12 hours, that is to say overnight, for example.

Danach erfolgt das Aufbringen der Versilberung, das in mehreren Schritten vorgenommen wird. So wird die Oberfläche der durchgetrockneten Grundlackschicht mit zwei Vorsensibilisierungslösungen behandelt. Die erste Vorsensibilisierungslösung enthält hauptsächlich modifizierte Saccharide und geringe Mengen von regulierenden Additiven, die in einer sauren, konzentrierten Mischung vorliegen. Diese Vorsensibilisierungslösungen werden von den Firmen Spraylat Corp. NT. Vernon, NY, USA bzw. Aachen, Deutschland, unter der Bezeichnung TL-30 sowie von der Anmelderin unter der Artikel-Nummer 1275 1 vertrieben. Diese wässrige, klare, gelb-braune Flüssigkeit ist vollständig in Wasser löslich und reagiert sauer.Thereafter, the application of the silver plating is carried out in several steps. Thus, the surface of the through-dried base coat layer is treated with two Vorsensibilisierungslösungen. The first presensitization solution contains mainly modified saccharides and small amounts of regulatory additives present in an acidic, concentrated mixture. These presensitization solutions are available from Spraylat Corp. NT. Vernon, NY, USA and Aachen, Germany, under the name TL-30 and sold by the applicant under the item number 1275 1. This watery, clear, yellow-brown liquid is completely soluble in water and is acidic.

Die erste Vorsensibilisierungslösung ist in einer Verdünnung von 1:9 mit deionisiertem Wasser anzuwenden.The first presensitization solution should be used in a 1: 9 dilution with deionized water.

Die mit dem Grundlack versehenen Kerzen sind in die Vorsensibilisierungslösung zu tauchen und anschließend mit deionisiertem Wasser zu spülen.The basecoated candles should be dipped into the presensitization solution and then rinsed with deionized water.

Anschließend wird eine zweite Vorsensibilisierungslösung aufgebracht, die hauptsächlich Zinn-Halogen-Verbindungen und Salzsäure enthält. Es handelt sich um eine wässrige, klare, farblose bis leicht gelbliche Flüssigkeit, die stechend riecht und vollständig in Wasser löslich ist. Diese zweite Vorsensibilisierungslösung dient zur Optimierung der Haftung der Silberschicht auf der Grundlackschicht.Subsequently, a second presensitization solution containing mainly tin-halogen compounds and hydrochloric acid is applied. It is an aqueous, clear, colorless to slightly yellowish liquid that smells pungent and is completely soluble in water. This second presensitization solution serves to optimize the adhesion of the silver layer to the base coat layer.

Die zweite Vorsensibilisierungslösung wird mit einer hohen Verdünnung eingesetzt, beispielsweise werden auf ein Milliliter dieser Lösung ein Liter deionisiertes Wasser gegeben.The second presensitization solution is used at a high dilution, for example one liter of deionized water is added to one milliliter of this solution.

Die Vorsensibilisierungslösung 2 wird von der Firma Spraylat unter der Bezeichnung "SCS" bzw. von der Anmelderin unter der Nummer 1275 2 vertrieben.The Vorsensibilisierungslösung 2 is sold by the company Spraylat under the name "SCS" or by the applicant under the number 1275 2.

Für die anschließende Versilberung kommt ein nass-chemischer Versilberungsprozess zum Einsatz. Ausgangslösungen sind eine saure Reduktionslösung, die hauptsächlich modifizierte Saccharide und geringe Mengen von Additiven enthält, und eine aus zwei getrennten Basislösungen bestehende Silberlösung.For the subsequent silver plating, a wet-chemical silver plating process is used. Starting solutions are an acidic reduction solution containing mainly modified saccharides and small amounts of additives, and a silver solution consisting of two separate base solutions.

Die Reduktionslösung wird von der Firma Spraylat unter der Bezeichnung "BKR-5" vertrieben bzw. von der Anmelderin unter der Nummer 1275 3. Sie weist einen pH-Wert (bei 22° C) von ca. 0,5 bis 1,0 auf und ist eine wässrige, klare, leicht rosafarbene Flüssigkeit. Die eigentlich das Silber aufweisende erste Basislösung enthält Silberdiaminnitrat, Ammoniumhydroxid und geringe Mengen stabilisierender Additive. Es handelt sich um eine wässrige, klare, blaue Flüssigkeit, die stark ammoniakalisch riecht. Sie ist vollständig in Wasser löslich. Ihr pH-Wert beträgt ca. 11 bis 12 bei 22° C.The reducing solution is sold by the company Spraylat under the name "BKR-5" or by the applicant under the number 1275 3. It has a pH (at 22 ° C) of about 0.5 to 1.0 and is a watery, clear, slightly pinkish liquid. The first base solution, which actually contains the silver, contains silver diamine nitrate, ammonium hydroxide and small amounts of stabilizing additives. It is an aqueous, clear, blue liquid that smells strongly ammoniacal. It is completely soluble in water. Its pH is about 11 to 12 at 22 ° C.

Diese Basislösung wird zu gleichen Volumenteilen mit der zweiten Basislösung vermischt, die Natriumhydroxid, Ammoniumhydroxid und geringe Mengen von stabilisierenden Additiven enthält. Es handelt sich um eine wässrige, klare, leicht grünliche Flüssigkeit, deren Geruch ebenfalls ammoniakalisch ist. Ihr pH-Wert beträgt ca. 13 bei 22° C. Diese zweite Basislösung stellt im Wesentlichen eine Reaktionsbeschleunigerlösung dar, wobei durch vermehrte Zugabe die Reaktionsgeschwindigkeit erhöht werden kann.This base solution is mixed in equal parts by volume with the second base solution containing sodium hydroxide, ammonium hydroxide and small amounts of stabilizing additives. It is an aqueous, clear, slightly greenish liquid whose odor is also ammoniacal. Its pH is about 13 at 22 ° C. This second base solution is essentially a reaction accelerator solution, whereby the reaction rate can be increased by increased addition.

Die beiden Silberlösungen werden unter den Bezeichnungen "BKA-5" bzw. "BKS-5" von der Firma Spraylat bzw. unter den Nummern 1275 4 und 1275 5 von der Anmelderin vertrieben. Die Reduktionslösung einerseits und die aus den beiden vorgenannten Basislösungen bestehende Silberlösung andererseits werden jeweils in getrennte Druckbehälter einer Sprüheinrichtung gefüllt, in deren Düsenkopf die beiden Lösungen unmittelbar vor dem Aufsprühen gemischt werden. Das Ausfällen der Silberpartikel erfolgt dabei während des Sprühweges vom Düsenkopf zur zu verspiegelnden Oberfläche. Die Spritzdauer beträgt ca. 10 bis 15 Sekunden, bis eine vollständig versilberte Fläche durch Bilden einer durchgehenden Silberschicht erreicht ist. Der Sprühdruck beträgt ca. 2 bar, wobei der Misch-Düsenkopf eine 1-mm-Düse aufweist.The two silver solutions are sold under the names "BKA-5" and "BKS-5" by the company Spraylat or under the numbers 1275 4 and 1275 5 by the applicant. The reducing solution, on the one hand, and the silver solution consisting of the two aforementioned base solutions, on the other hand, are each filled into separate pressure vessels of a spraying device in whose nozzle head the two solutions are mixed immediately before spraying. The precipitation of the silver particles takes place during the spray path from the nozzle head to the surface to be mirrored. The injection period is about 10 to 15 seconds until a fully silvered surface is achieved by forming a continuous silver layer. The spray pressure is about 2 bar, with the mixing nozzle head has a 1-mm nozzle.

Nach dem Tauchen der grundlackierten Kerzen in die Vorsensibilisierungslösungen und nach dem Aufsprühen der Metallisierungslösung wird jeweils mit deionisiertem Wasser durch Sprühen nachgespült. Diese Wasserspülung erfolgt mit einer Bechersprühpistole oder einer Sprühpistole mit Druckbehälter, wobei eine Düsengröße von 1,8 mm zum Einsatz kommt.After immersing the primed candles in the Vorsensibilisierungslösungen and after spraying the metallizing solution is rinsed in each case with deionized water by spraying. This water rinse is carried out with a cup spray gun or a spray gun with pressure vessel, with a nozzle size of 1.8 mm is used.

Nach dem Aufbringen der Metallisierungsschicht werden die Kerzen mindestens vier Stunden abgetrocknet, wobei der Lackiervorgang jedoch nach 24 Stunden abgeschlossen sein sollte.After applying the metallization layer, the candles are dried for at least four hours, but the painting process should be completed after 24 hours.

Dazu wird ein transparenter Decklack aufgetragen, der zum Schutz der Versilberung von Korrosion, also Vergilbung oder Schwärzung, dient. Die Lackierung erfolgt wiederum im Eintauchverfahren, die abschließende Trocknung erfolgt unter Umgebungsbedingungen oder kann durch Wärmeunterstützung abgekürzt werden.For this purpose, a transparent topcoat is applied, which serves to protect the silvering of corrosion, ie yellowing or blackening. The painting is done again in the immersion process, the final drying takes place under ambient conditions or can be abbreviated by heat support.

Durch die Decklackschicht kann das Finish der Kerze noch dahingehend variiert werden, dass die Spiegelschicht gefärbt wird. Ferner kann eine Mattierung erfolgen.Through the topcoat layer, the finish of the candle can still be varied to the effect that the mirror layer is colored. Furthermore, a matting can take place.

Im Folgenden werden Beispiele für Zusammensetzungen verschiedener Decklacke angegeben:
- Decklack glänzend Komponente FK · % -1 Typ Menge g -1 Halwedrol OX 87 / 40 W 40,0 Bindemitteldispersion 773,00 (PUR) Joncryl95 30,0 Bindemitteldispersion 200,00 (PA) Tafigel PUR 40 ―Lsg. 20,0 Verdicker 5,00 Surfynol DF-66 49,0 Entschäumer 5,40 Wasserdeion. 0,0 Wasser 5,40 Butylglykol 0,0 Lösungsmittel 3,30 Surfynol 2502 0,0 Netzmittel 1,10 Byk 347 82,0 Netzmittel 1,50 Butylglykol 0,0 Lösungsmittel 4,50 Fisantrol 3010 50,0 Additiv zur Verbesserung 2,00 der Oberflächenglätte □ 39,80 Hydrolack glänzend 1001,20
- Decklack matt (1. Variante) Komponente FK · % -1 Typ Menge g -1 Halwedrol TN 6880-2 / 40 40,0 Bindemitteldispersion 783,40 W (PUR, Polyester) Tafigel PUR 40 ―Lsg. 20,0 Verdicker 22,00 Deuteron MK 100,0 Mattierungskunststoff 35,00 Syloid ED-30 100,0 Mattierungsmittel 60,00 Wasser 0,0 Wasser 92,80 Byk 027 100,0 Entschäumer 6,80 Σ 44,31 Hydrolack matt 1 1000,00
- Decklack matt (2. Variante) Komponente FK · % -1 Typ Menge g -1 Halwedrol OX 87 / 40 W 40,0 Bindemitteldispersion 673,00 (PUR) Joncryl 95 30,0 Bindemitteldispersion 173,00 (PA) Deuteron MK 100,0 Mattierungskunststoff 50,00 Syloid ED-30 100,0 Mattierungsmittel 38,00 Wasser 0,0 Wasser 51,00 Latekoll D 32 % 32,0 Verdicker 10,00 Byk 027 100,0 Entschäumer 5,00 Σ 43,52 Hydrolack matt 2 1000,00 The following are examples of compositions of various topcoats:
- Top coat glossy component FK ·% -1 Type Quantity g -1 Halwedrol OX 87/40 W 40.0 binder dispersion 773.00 (PURE) Joncryl95 30.0 binder dispersion 200.00 (PA) Tafigel PUR 40 -Lsg. 20.0 thickener 5.00 Surfynol DF-66 49.0 defoamers 5.40 Wasserdeion. 0.0 water 5.40 butylglycol 0.0 solvent 3.30 Surfynol 2502 0.0 wetting agent 1.10 Byk 347 82.0 wetting agent 1.50 butylglycol 0.0 solvent 4.50 Fisantrol 3010 50.0 Additive for improvement 2.00 the surface smoothness □ 39,80 Hydro paint glossy 1,001.20
- Topcoat matt (1st variant) component FK ·% -1 Type Quantity g -1 Halwedrol TN 6880-2 / 40 40.0 binder dispersion 783.40 W (PUR, polyester) Tafigel PUR 40 -Lsg. 20.0 thickener 22.00 Deuterone MK 100.0 Mattierungskunststoff 35,00 Syloid ED-30 100.0 matting agent 60,00 water 0.0 water 92,80 Byk 027 100.0 defoamers 6.80 Σ 44.31 Hydro paint mat 1 1,000.00
- Topcoat matt (2nd variant) component FK ·% -1 Type Quantity g -1 Halwedrol OX 87/40 W 40.0 binder dispersion 673.00 (PURE) Joncryl 95 30.0 binder dispersion 173.00 (PA) Deuterone MK 100.0 Mattierungskunststoff 50,00 Syloid ED-30 100.0 matting agent 38,00 water 0.0 water 51.00 Latekoll D 32% 32.0 thickener 10.00 Byk 027 100.0 defoamers 5.00 Σ 43.52 Hydro paint matt 2 1,000.00

Die Viskositäten der vorgenannten Decklacke werden auf 27 Sekunden im 4-mm-DIN-Becher bei 20° C eingestellt. Eine Farbgebung erfolgt jeweils durch Zugabe 10 %-iger Lösungen der jeweiligen Farbstoffe in 1-Metoxipropanol-2. Anschließend erfolgt eine Viskositätseinstellung auf 13 Sek. im 4-mm-DIN-Becher durch Zugabe von deionisiertem Wasser.The viscosities of the above-mentioned topcoats are adjusted to 27 seconds in a 4 mm DIN cup at 20 ° C. Each coloration is carried out by adding 10% solutions of the respective dyes in 1-Metoxipropanol-2. Subsequently, the viscosity is adjusted to 13 seconds in the 4 mm DIN cup by adding deionized water.

Wie aus den vorstehenden Zusammensetzungen deutlich wird, setzt sich der Decklack zusammen aus einer oder mehreren Bindemitteldispersionen im Gemisch auf der Basis von Polyurethan, Polyester und/oder Polyacrylat. Die Bindemittel zeigen dabei keine oder nur schwache Vergilbung bei einer Lagerung unter Standardbedingungen.As is apparent from the above compositions, the topcoat is composed of one or more binder dispersions in a mixture based on polyurethane, polyester and / or polyacrylate. The binders show little or no yellowing when stored under standard conditions.

Ein mattierter Decklack enthält zusätzlich ein oder mehrere Mattierungsmittel, die aus unterschiedlichen Verbindungsklassen aufgebaut sein können.A matted topcoat additionally contains one or more matting agents, which can be composed of different classes of compounds.

Durch den Verdicker kann der Festkörperanteil am Decklack erniedrigt werden. Geeignete Netzmittel sorgen für eine ausreichende Benetzung der Silberschicht durch den Decklack.Due to the thickener, the solids content of the topcoat can be lowered. Suitable wetting agents ensure adequate wetting of the silver layer by the topcoat.

Die vorgesehenen Entschäumungsmittel bewerkstelligen ein vollständiges Aufplatzen aller durch beim Tauchen der versilberten Kerzen in dem Decklack entstehenden Luftblasen während des Ablaufens des Lacks von der Kerze.The envisaged defoaming agents accomplish a complete bursting of all air bubbles generated by the immersion of the silvered candles in the topcoat during the course of the paint from the candle.

Durch den Decklack wird der Zutritt von Sauerstoff zur Silberschicht weitgehend unterbunden, was den gewünschten Korrosionsschutz mit sich bringt. Damit wird auch ein Glanzverlust (das sogenannte "Anlaufen") der Silberschicht vermieden.By the topcoat, the access of oxygen to the silver layer is largely prevented, which brings the desired corrosion protection with it. Thus, a loss of gloss (the so-called "tarnishing") of the silver layer is avoided.

Der getrocknete Lackfilm gewährleistet ferner einen ausreichenden Abbrand der Kerze, d. h. er reißt beim Abbrennen der Kerze nicht, er ruft keine Verschmutzung des Brandtellers hervor und ist selbst nicht entzündlich. Der getrocknete Lackfilm zeichnet sich ferner durch eine unter üblichen Lagerbedingungen (unterhalb 35° C und 80° C relativer Luftfeuchtigkeit) ausreichende Wasserfestigkeit aus, d. h. er löst sich nicht selbständig ab und ist nicht ohne erhebliche Scherkräfte parallel zur Lackoberfläche entfernbar. The dried paint film also ensures sufficient burning of the candle, d. H. he does not tear when burning the candle, it does not cause pollution of the fire dish and is not flammable itself. The dried paint film is further characterized by a sufficient under normal storage conditions (below 35 ° C and 80 ° C relative humidity) sufficient water resistance, d. H. it does not detach itself and can not be removed without significant shearing forces parallel to the paint surface.

Claims (14)

  1. Method for surface-metallising wax objects, especially for silver-plating candles to give them a bright de luxe shine, characterised by the following method steps:
    - applying a primer to the surface of the object to be finished,
    - drying the primer,
    - treating the surface of the primer coat with a presensitising solution,
    - applying a solution containing a metallisation agent to the presensitised surface of the primer coat, a metallisation coat being deposited,
    - drying off the metallisation coat which is formed,
    - applying a transparent top paint and
    - drying the top coat which is formed.
  2. Method according to claim 1, characterised in that the primer is applied using the dipping method.
  3. Method according to claim 2, characterised in that the primer is based on solvents, binders and additives, in particular plasticisers, flow promoters, wetting agents and defoaming agents.
  4. Method according to claim 2 or 3, characterised in that the primer is dried for at least 12 hours, preferably at room temperature, until the primer coat has dried completely.
  5. Method according to any one of the preceding claims, characterised in that for presensitising the surface of the primer coat, the object is dipped into at least one presensitising solution.
  6. Method according to claim 5, characterised in that a first presensitising solution containing mainly modified saccharides and a second presensitising solution based on hydrochloric acid and tin/halogen compounds are used.
  7. Method according to any one of the preceding claims, characterised in that the metallisation layer is applied by spraying a two-component spray solution composed of a reducing solution and a metallisation solution.
  8. Method according to claim 7, characterised in that the reducing and metallisation solutions are mixed, immediately prior to spraying, in the nozzle head of a spray device.
  9. Method for silver-plating wax objects according to claim 7 or 8, characterised in that the reducing solution contains mainly modified saccharides.
  10. Method for silver-plating wax objects according to any one of claims 7 to 9, characterised in that the metallisation solution contains mainly silver diamine nitrate and ammonium hydroxide.
  11. Method according to claim 10, characterised in that an accelerator solution containing mainly ammonium hydroxide and sodium hydroxide is added to the metallisation solution.
  12. Method according to any one of the preceding claims, characterised in that the top coat is applied by dipping the object into a one-component or multicomponent binder dispersion based on polyurethane, polyester and/or polyacrylate.
  13. Method according to claim 12, characterised in that the binder dispersion contains a defoaming agent.
  14. Method according to claim 12 or 13, characterised in that flatting agents and/or dyes are added to the binder dispersion.
EP04717599A 2003-04-04 2004-03-05 Method for surface-metallizing wax objects, especially for silver-plating candles to give them a bright de luxe shine Expired - Lifetime EP1611228B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10315322A DE10315322A1 (en) 2003-04-04 2003-04-04 Process for the surface metallization of wax articles, in particular for mirror-silvering of candles
PCT/EP2004/002252 WO2004087853A1 (en) 2003-04-04 2004-03-05 Method for surface-metallizing wax objects, especially for silver-plating candles to give them a bright de luxe shine

Publications (2)

Publication Number Publication Date
EP1611228A1 EP1611228A1 (en) 2006-01-04
EP1611228B1 true EP1611228B1 (en) 2006-10-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04717599A Expired - Lifetime EP1611228B1 (en) 2003-04-04 2004-03-05 Method for surface-metallizing wax objects, especially for silver-plating candles to give them a bright de luxe shine

Country Status (5)

Country Link
EP (1) EP1611228B1 (en)
CN (1) CN100354402C (en)
AT (1) ATE341601T1 (en)
DE (2) DE10315322A1 (en)
WO (1) WO2004087853A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1034166C2 (en) * 2007-07-19 2009-01-20 Hendrikus Antinius Van Dijk Candle provided with a foil and method for manufacturing a candle.
DE202014006874U1 (en) * 2014-08-22 2014-09-26 Hendrikus Antonius van Dijk Candle provided with a cover

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD228707A3 (en) * 1983-09-19 1985-10-16 Wittol Wittenberg Veb METHOD FOR THE PRODUCTION OF COLORED CANDLES AND WAX FORMING BODIES WITH METALLIC SURFACE EFFECT
DE3731896A1 (en) * 1987-09-23 1989-04-13 Eika Wachswerke Fulda Gmbh METHOD FOR PRODUCING SPARK PLUGS AND SPARK PLUG PRODUCED BY THIS METHOD
US6562085B1 (en) * 2001-06-06 2003-05-13 Ciba Specialty Chemicals Corporation Candle wax compositions stabilized with UV absorber-metal combinations

Also Published As

Publication number Publication date
CN100354402C (en) 2007-12-12
CN1768129A (en) 2006-05-03
DE502004001681D1 (en) 2006-11-16
EP1611228A1 (en) 2006-01-04
WO2004087853A1 (en) 2004-10-14
DE10315322A1 (en) 2004-10-14
ATE341601T1 (en) 2006-10-15

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