EP0384506B1 - Procédé de revêtement de feuilles de finition et de bandes sans fin - Google Patents

Procédé de revêtement de feuilles de finition et de bandes sans fin Download PDF

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Publication number
EP0384506B1
EP0384506B1 EP90200247A EP90200247A EP0384506B1 EP 0384506 B1 EP0384506 B1 EP 0384506B1 EP 90200247 A EP90200247 A EP 90200247A EP 90200247 A EP90200247 A EP 90200247A EP 0384506 B1 EP0384506 B1 EP 0384506B1
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EP
European Patent Office
Prior art keywords
weight
component
coating composition
particle size
components
Prior art date
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EP90200247A
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German (de)
English (en)
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EP0384506A1 (fr
Inventor
Karlheinz Dr. Dickerhof
Joachim Dr. Roll
Wilhelm Moss
Thomas Schwalm
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BASF Farben und Fasern AG
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BASF Lacke und Farben AG
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372—Particulate matter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372—Particulate matter
    • Y10T428/2438—Coated
    • Y10T428/24388—Silicon containing coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372—Particulate matter
    • Y10T428/24405—Polymer or resin [e.g., natural or synthetic rubber, etc.]

Definitions

  • the present invention relates to a method for coating finish films and continuous edges, in which an aqueous, acid-curing coating composition is applied and baked.
  • the invention also relates to the aqueous, acid-curing coating compositions used in this process and the finish films and continuous edges coated by this process, both with and without a three-dimensional pore structure.
  • Impregnated papers which are pressed onto boards for pre-processing in the sense of a primer (primer film) or often also have a decorative effect (decorative film), have long been tried and tested in the furniture and board industry. The shortage and increase in the price of real veneers has contributed significantly to the increased use of the latter. After pressing, the foils must be repainted on chipboard or hardboard, as otherwise the surface effect will not be sufficient.
  • impregnated paper In the course of simplifying the production process, an improved type of impregnated paper, the finished film, is becoming more and more popular. These are impregnated plain-colored or printed paper foils that are coated with a varnish at the film manufacturer.
  • finish foils and endless edges thus obtained are delivered as rolls to the furniture and panel industry, where they are exposed to heat and / or Pressure exposure to substrates such as chipboard or hardboard are glued. In this way, surfaces are obtained which generally do not require any further painting, that is to say can be further processed in a "press-falling" manner.
  • finish foils with a three-dimensional pore structure are also available, which represent an excellent imitation of a wood veneer (cf. e.g. DE-A-32 47 677; US-A-3,811,915; DE-A-30 24 391 ).
  • a wood veneer cf. e.g. DE-A-32 47 677; US-A-3,811,915; DE-A-30 24 391 .
  • the similarity to a natural veneer has increased the demand for such decorative foils and lacquer systems considerably.
  • the paints used to paint the finish foils or endless edges in question and the coatings produced from the paints have to meet high requirements.
  • aqueous coating systems For example, from the publication of the international application WO 88/06176 aqueous two-component paints for single-layer coating of finish foils and endless edges are known, which lead to coatings with a low formaldehyde emission ( ⁇ 3.5 mg / hm2, determined in accordance with DIN 52368) .
  • the paints in order to achieve the excellent properties of the resulting coating, it is necessary for the paints to have a self-crosslinking acrylate dispersion in very high proportions of 40 to 85% by weight, preferably even 60 to 85% by weight, based in each case on the total composition of the binder component.
  • lacquers suitable for coating the finish foils and endless edges are that they can be applied using the coating machines customary in foil production and that after 140 to 210 heat treatment for less than 60 seconds, usually 10 to 20 seconds ° C are hardened to such an extent that they tightened the pressing conditions used in the production of the panels or furniture parts (for example 5 to 30 seconds at 150 to 180 ° C and 0.5-1.9 kPa (5 to 20 kp / cm2); Press conditions: survive undamaged up to 180 seconds at 170 to 180 ° C and up to 2.9 kPa (30 kp / cm2) without showing blocking properties and discolouration
  • the surfaces obtained in this way should have the highest possible scratch resistance the coatings against various reagents, e.g. foods, such as beer, coffee and the like, as required in DIN 68 861, group A.
  • DE-A-23 16 158 discloses aqueous acid-curing two-component paints based on etherified aminoplast resins and polyester resins, which are also used for coating films for the furniture industry.
  • the two-component paints described there are characterized by rapid curing and high hardness, scratch resistance and stackability of the resulting coating, but have the considerable disadvantage of high formaldehyde emissions from finish foils and endless edges coated with these paints.
  • finish foils In the course of ever stricter legal requirements with regard to the formaldehyde emission from the Finish foils used in the furniture industry, however, there is a very high demand for finish foils with a lower formaldehyde emission.
  • the present invention was therefore based on the object of providing a method for coating finish foils and endless edges, in which the resulting coated foils have the lowest possible formaldehyde emission.
  • the formaldehyde emission of the coated finish film or endless edge individually or in combination with a low-formaldehyde chipboard (emission class E1), should not exceed a value of 3.5 mg / h m2, determined according to DIN 52 368.
  • the equipment already available from the film manufacturer can be used to carry out the process and that the finish films or endless edges obtained meet the above-mentioned requirements.
  • the paints used in the process can be applied with the usual painting machines and harden quickly and that the resulting surfaces have the highest possible scratch resistance and resistance, for example to water, mustard and coffee solution (DIN 68 861).
  • aqueous coating composition used in the process according to the invention and containing the paint components I (binder concentrate or dispersion) and II (hardener component) will now be explained in more detail below.
  • the melamine resins (component A) used in paint component I are generally known, generally etherified, melamine-aldehyde reaction products, preferably Melamine-formaldehyde reaction products. Apart from the degree of condensation, which should be as low as possible, the water dilutability of the melamine resins depends on the etherification component, only the lowest members of the alkanol series giving water-soluble condensates. Hexamethoxymethylmelamine resins are of the greatest importance. If solubilizers are used, butanol-etherified melamine resins can also be dispersed in the aqueous phase.
  • Suitable melamine resins are those commercially available under the brand names Cymel® 300, 301, 303 (manufacturer: Dyno Cyanamid, Düsseldorf), Luwipal® 068, 066 (manufacturer: BASF AG, Ludwigshafen), Beetle® BE 3745 and BE 370 (manufacturer: BIP Chemicals Ltd., Great Britain), Maprenal® MF 900, 904 and 910 (manufacturer: Hoechst AG), Cibamin® (Ciba AG, Switzerland), Resimene® 714, 745 and 747 (Monsanto) available water-soluble melamine resins . Hexamethoxymethylmelamine resins, such as. B. Cymel® 300, 301, 303; Luwipal® 066 and Maprenal® MF 900.
  • the melamine resins are used in an amount of 15 to 55% by weight, preferably 30 to 45% by weight, based in each case on the sum of the parts by weight of components A to E.
  • the water-dilutable urea resins used as component B in an amount of 0 to 30% by weight, preferably 0 to 15% by weight, based in each case on the sum of the parts by weight of components A to E, are generally known water-dilutable urea resins.
  • suitable resins are those commercially available under the brand names Dynomin® UM 15 (manufacturer: Norsk Spraengstof Industrie, Norway), Resamin® VHW 3525 (manufacturer: Hoechst AG) or Plastopal® (manufacturer: BASF AG, Ludwigshafen) available plasticized or non-plasticized urea-formaldehyde reaction products.
  • Suitable polyol components C for crosslinking the melamine and formaldehyde resins are, for example, di- and higher-functional alcohols and / or polyester polyols and / or polyurethane polyols and / or polyether polyols.
  • Component C is used in an amount of 5 to 55% by weight, preferably 20 to 40% by weight, based in each case on the sum of the parts by weight of components A to E.
  • diols and polyols examples include ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, butanediol, neopentylglycol, triethylene glycol, hexanediol, cyclohexanedimethanol 1,4, trimethylolpropane, ditrimethylolpropane, pentaerythritol, dipentaerythritol, trimethylolethanhritol, glycerolinanitrile, trimethylolethane, glycolite Adonite, xylitol, sorbitol, mannitol and dulcitol, eth- and / or propoxylated derivatives of trimethylolpropane and trishydroxyethyl isocyanurate. Trimethylolpropane, diethylene glycol, triethylene glycol and butanediol are preferably used.
  • polyester polyols are low molecular weight, water-soluble, linear and / or branched condensation products of adipic acid, malonic acid, phthalic acid, isophthalic acid, trimellitic anhydride, succinic acid, glutaric acid, sebacic acid, hexahydrophthalic acid, cyclohexyldicarboxylic 1.4, tetrahydrophthalic acid, maleic acid, fumaric acid, itaconic acid or citraconic acid, with alcohols containing two or more hydroxyl groups.
  • suitable diols and polyols are the compounds listed above.
  • the polyester polyols are prepared in a known manner by esterification of the components at higher temperatures with removal of the water of reaction formed. An excess of alcoholic component is preferably used in the preparation of the polyester polyols, so that products are formed which carry hydroxyl end groups. Mixtures of the polyester polyols with triplets are very particularly preferably used as component C.
  • polyether polyols such as, for example, copolymers of polyethylene oxide and polypropylene oxide up to a molecular weight of 7000, which must be water-thinnable, water-thinnable polymerization products of tetrahydrofuran and reaction products of polyester polyols with ethylene or propylene oxide and addition products of alkylene oxides on di- and polyamines. if these reaction products are water-dilutable.
  • the -CO-N (R1) -CH (R2) -OR3 groups can have been introduced into the polyacrylate molecules both via a polymerized monomer and via a polymer-analogous reaction.
  • the self-crosslinkable polyacrylate resins can also contain carboxyl groups.
  • the person skilled in the art can determine, with the aid of a few orientation tests, which carboxyl group content he should choose for his particular problem.
  • the polyacrylate resin can also contain other functional groups, e.g. Hydroxyl groups or free amide groups.
  • the aqueous acrylate dispersions which can be used can, by generally known methods, copolymerize (meth) acrylic acid esters, preferably methyl, ethyl, propyl or butyl (meth) acrylates, the corresponding (meth) acrylic acid amide derivatives and, if appropriate, carry a corresponding amount of carboxyl groups, a polymerizable double bond containing monomers, e.g. Fumaric or maleic acid, preferably (meth) acrylic acid with the possible use of smaller amounts of other monomers, e.g. Vinyl acetate, hydroxyalkyl (meth) acrylates, styrene, (meth) acrylic amides, etc., can be produced.
  • monomers e.g. Fumaric or maleic acid
  • acrylic acid e.g. Vinyl acetate, hydroxyalkyl (meth) acrylates, styrene, (meth) acrylic amides, etc.
  • the paint component I contains one or more fillers with a maximum particle size of ⁇ 40 »m, preferably ⁇ 20» m, an average particle size of 0.015 to 10 »m, preferably 0.015 to 8» m and a density of ⁇ 2, 9 g / cm3, preferably ⁇ 2.8 g / cm3.
  • care should be taken in particular when using larger amounts of hardener component II (approx. ⁇ 5% by weight hardening catalyst, based on the total weight of the coating composition), that there are no adverse interactions between the filler and the hardening catalyst (e.g. gas evolution) .
  • Platelet-like fillers are preferred because they achieve the best results in reducing formaldehyde emissions.
  • talc, mica and kaolin of the above-mentioned particle sizes and densities and other aluminum- and / or magnesium-containing silicates of the above-mentioned particle sizes and densities.
  • talc types “Micro Talkum IT Extra” (manufacturer: Norwegian) and “Talcum Steamic” which are commercially available under the following brand names 00S "(manufacturer: Luzenac), aluminum silicates" China-Clay Suprime "(manufacturer ECCI),” ASP 600 "and Satintone 1 (manufacturer: Engelhard) as well as mica types” Mikal 00180 "(manufacturer: Arlati) and English Mica Mica M "(manufacturer: MICA).
  • the specified selection of suitable fillers results from the required properties of the coating compositions used according to the invention. If, for example, the average particle size of the fillers used is too small, this results in an excessive thixotropy of the paints for the practical application of the paints. If the average particle size is too large, on the other hand, the surface quality of the resulting coating no longer meets the high requirements of the film manufacturer. Their density also has a decisive influence on the suitability of the fillers.
  • fillers mentioned above are used in an amount of 5 to 20% by weight, preferably 7 to 15% by weight, based in each case on the sum of the parts by weight of components A to E.
  • the amount of component E used is only 5 to 10% by weight, based on the sum of the parts by weight of components A to E.
  • both paint components I and II can also contain liquid diluents.
  • suitable liquid diluents consist of at least 50% by weight, preferably 95 to 100% by weight, based on the sum of the parts by weight of all liquid diluents, of water.
  • organic solvents such as, for example, mono- or polyhydric alcohols, ethers, esters and ketones, such as, for example, N-methylpyrrolidone) butanol, isopropanol, ethanol, ethyl and butyl glycol, and their acetates, butyl diglycol, ethylene glycol dibutyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, Cyclohexanone, methyl ethyl ketone, acetone, isophorone, propylene glycol or mixtures thereof may be included.
  • organic solvents such as, for example, mono- or polyhydric alcohols, ethers, esters and ketones, such as, for example, N-methylpyrrolidone) butanol, isopropanol, ethanol, ethyl and butyl glycol, and their acetates, butyl diglycol, ethylene glycol dibutyl ether, ethylene
  • the amount of diluent used is generally for paint component I 0 to 20 wt .-%, based on the total weight of all components of paint component I.
  • the paint component II usually contains 30 to 80 wt .-%, based on the total weight of paint component II, diluent.
  • the hardener component (lacquer component II) in the aqueous two-component lacquer used in the process according to the invention contains a water-dilutable acid, its aqueous solution or an acid blocked with amines or amino alcohols or its aqueous solution.
  • the water-dilutable acids used are phosphoric acid, maleic acid, hydrochloric acid, para-toluenesulfonic acid and its derivatives, naphthalenesulfonic acid and its derivatives and the corresponding reaction products of these acids with amines or amino alcohols, such as, for example, an aqueous solution of the ammonium salt of p-toluenesulfonic acid.
  • Solutions of para-toluenesulfonic acid in acid-stable acrylate dispersions are also particularly suitable.
  • Crosslinkable, nonionic acrylate dispersions with a solids content of 50% and a minimum film-forming temperature of 28 to 32 ° C. are preferably used.
  • the sulfonic acids are used in blocked form, for example as the ammonium salt.
  • Para-toluenesulfonic acid, hydrochloric acid and phosphoric acid are preferably used, with para-toluenesulfonic acid and the solutions of p-toluenesulfonic acid in acid-stable acrylate dispersions being particularly preferred.
  • the use of solutions of para-toluenesulfonic acid in acid-stable acrylic dispersions As a hardener component, it has the advantage that the surface properties, in particular the surface covering, are improved.
  • the acids or their derivatives are preferably used as a solution in water or a water-dilutable solvent.
  • the paint components I and II are mixed in such a ratio before application that for 100 parts by weight of the paint component I consisting of components A to E (ie without diluent), 0.5 to 30 parts by weight of the pure hardener component II, ie paint component II without diluents.
  • the pot life (time during which the mixture can be processed) of the mixture obtained depends, for example, on the type and concentration of the hardener component and the processing temperature. According to the requirements of the film manufacturers, the pot lives of the mixtures are over 24 hours.
  • the paint components I and II are stable for longer than 2 months separately.
  • the aqueous coating compositions used according to the invention may also contain conventional auxiliaries and additives in the customary amounts, for example 0 to 10% by weight, preferably 0 to 3% by weight, matting agent (silica derivatives ...), 0 to 2% by weight, preferably 0.5 to 1.0% by weight, waxes (polyethylene and polypropylene waxes, for example), 0 to 2.0% by weight, preferably 0.5 to 1.0% by weight , Emulsifier (ethoxylated alkylphenols, ethoxylated fatty acids), 0 to 2.0% by weight, preferably 0.5 to 1.0% by weight, defoamer and 0 to 10% by weight, preferably 0 to 3% by weight % of other additives such as plasticizers (ethoxylated glycerin ...), thixotropic agents (polyacrylates, polyurethanes, cellulose derivatives ...), leveling and wetting agents (sodium salts of polyacrylates ...) and film-forming aid
  • the paint components I and II are prepared in the usual way by mixing the components. Sometimes it is advisable to first dissolve a component in a solvent if it is not in liquid form and to mix this solution with the other components.
  • the aqueous coating composition described above can also be pigmented, in which case the paint component I contains 0 to 40% by weight, preferably 0 to 30% by weight, in each case based on the total weight of the paint component I, pigment.
  • the optimum pigment content in each case depends on the desired opacity and the pigment used and can be found by the average person skilled in the art with the aid of routine tests that are easy to carry out.
  • the various pigments can be ground together with the binder, or the paint component I is used as a paint for an aqueous pigment paste.
  • inorganic and organic pigments can be used as pigments, which are both water-wettable and not sublimable at the temperatures used and which do not change in color under the process and pH conditions.
  • pigments examples include titanium dioxide of the rutile type, yellow, red and black iron oxides, carbon black and phthalocyanines. Titanium dioxide is preferably used as the pigment.
  • the paint components I and II are mixed, in the case of the preferred Two-component paints used only shortly before application. If, on the other hand, the formulation as a one-component lacquer is possible by appropriate selection of the hardener component, mixing can also take place earlier.
  • the finish foils and endless edges are then coated with this mixture using specially developed machines.
  • Anilox rollers or wire doctor blades are available as paint application or metering devices.
  • the amount of lacquer applied is usually between 5 to 50 g / m2 with a wet film thickness of 10 to 80 »m. Drying ducts with heated air, so-called convectors or IR emitters or combinations of both or hot rollers (calenders) are usually used for drying the lacquer. After drying, the paper web is wound up as a roll and delivered to the furniture industry in this form.
  • the mixture of the lacquer component (1) and the hardener component (II) has been applied and brought to a temperature of 140 to 210 ° C, it hardens within 10 to 55 seconds, usually within 10 to 20 seconds ; without the formation of bubbles to such an extent that the lacquer surfaces thus created survive the further process steps - in particular the increasingly stringent pressing conditions increasingly used - without showing block properties or discoloration.
  • the films and continuous edges produced by the process according to the invention have the particular advantage that they have a very low formaldehyde emission of less than 3.5 mg / hm2. Even in combination with chipboard, especially those of emission class E1, they show an extraordinarily low formaldehyde emission of ⁇ 3.5 mg / hm2 (emission determined according to DIN 52368).
  • the film surfaces obtained by the process according to the invention are notable for good scratch resistance out. They also show good resistance to coffee solutions (DIN 68861) and good to satisfactory swelling behavior.
  • the coating compositions used in the process have short drying times, so that the films are cured to the extent that they are cured even after heat treatment at 140 ° C. to 210 ° C. for a time of less than 60 s, generally 10 to 20 s survive the pressing conditions used in the manufacture of the panels or furniture parts (eg 5 to 30 s at 150 to 180 ° C and 5 to 20 kp / cm2) without showing block properties and discoloration.
  • aqueous coating compositions in question are also suitable for painting wooden substrates, e.g. Hardboard, chipboard and wood materials, suitable. In many cases it can be advantageous to pre-coat with a primer. If particularly absorbent substrates are to be coated, either a separate primer, e.g. on a dispersion basis, submitted or painted twice with the same paint material.
  • the mixture obtained is then mixed with stirring with 4 parts of water and 7 parts of an aqueous, self-crosslinking anionic acrylate dispersion containing amide groups (average particle size 0.25 »m, viscosity at 23 ° C. 200 mPas, solids content 50%).
  • paint component I-1 100 parts of the paint component I-1 thus prepared are mixed with stirring with 5 parts of a 40% aqueous p-toluenesulfonic acid solution (paint component II) and the coating composition 1 obtained with 40 parts of water to a viscosity of 20 s (measured in DIN 4 Outlet cup set at 20 ° C).
  • the content of hexamethoxymethylmelamine resin in this coating composition 1 is 27.6% by weight, based on the overall formulation.
  • This coating composition 1 is applied by means of a wire knife to a white impregnate (weight of the impregnate 80 g / m2) (wet film thickness 30 »m) and then dried at 160 ° C. in the nozzle channel for 20 s.
  • a white impregnate weight of the impregnate 80 g / m2
  • wet film thickness 30 »m dry film thickness 30 »m
  • a paint component I-2 is produced by 30 parts of a water-dilutable, elastic urea-formaldehyde resin (acid number ⁇ 3 mgKOH / g) and 20 parts of a water-dilutable, largely etherified with methanol Melamine-formaldehyde resin (solids 80-85%, viscosity at 23 ° C 1.6-2.4 Pas) with 35 parts of a water-dilutable, partially unsaturated polyester polyol (OH number 420 mg / KOH / g, acid number ⁇ 5 mgKOH / g,), 6 parts of a kaolin (average particle size of 0.80 »m, maximum particle size 35» m, density 2.6 g / cm3), 2 parts of a talc (average particle size of 5 »m, maximum particle size 25» m, density 2.8 g / cm3) and 1 part of a nonionic emulsifier (acrylic-polyglycol ether) density
  • the most important properties and test results of the film B thus obtained are summarized in Table 1.
  • Example 1 The film A obtained in Example 1 is pressed with a particle board (emission class E 2, ie measured formaldehyde emission: 5 mg / hm2) and the formaldehyde emission of the composite is examined. The results are shown in Table 1.
  • a lacquer component I-3 is produced analogously to Example 1, with the difference that the filler aluminum silicate is replaced by 11 parts of water. 5 parts of 40% strength aqueous p-toluenesulfonic acid are added as lacquer component II and adjusted to a viscosity of 20 s (DIN 4 flow cup, 20 ° C.) with 20 parts of water. The content of hexamethoxymethylmelamine resin in this coating composition 3 is 32.0% by weight, based on the overall formulation. The application and drying of this coating composition 3 and the test of the film C obtained are carried out analogously to Example 1. The properties and test results of the film C are summarized in Table 1.
  • a lacquer component I-4 is also produced analogously to Example 2, with the difference from Example 2 that the fillers talc and kaolin are replaced by 8 parts of water.
  • the film top coat 4 is produced therefrom using 5 parts of 40% p-toluenesulfonic acid solution and applied and dried analogously to Example 2.
  • the properties and test results of the resulting film D are also shown in Table 1.
  • the film C obtained in the comparative example is pressed with a particle board (emission class E 2) analogously to Example 3 and the formaldehyde emission of the composite is examined.
  • the results are shown in Table 1.
  • a lacquer component I-5 is produced analogously to Example 1, with the difference that the filler aluminum silicate is replaced by 11 parts barium sulfate (average particle size 0.8 »m, density 4.4 g / cm3).
  • the coating composition 5 is prepared from this paint component I - 5 using 5 parts of 40% p-toluenesulfonic acid solution and applied and dried analogously to Example 1. The properties and test results of the resulting film E are shown in Table 1.
  • the examples illustrate that by adding fillers with an average particle size of 0.015 to 10 »m, a maximum particle size of maximum 40» m and a maximum density of 2.9 g / cm3 to the paints, the formaldehyde emission from them Varnishes coated films is drastically lowered.
  • the emission values of Example 1 with those of Comparative Example 1 (V1) and of Example 2 with those of Comparative Example 2 (V2) shows, the observed decrease in formaldehyde emission is higher than by a percentage reduction in the same amount of melamine-formaldehyde Resin or urea-formaldehyde resin in the hardened film is to be expected.
  • the proportion of hexamethoxymethyl melamine resin in the filler-containing coating composition 1 of Example 1 is 27.6% by weight, based on the overall formulation, while the proportion of hexamethoxymethyl melamine resin in the filler-free coating composition 3 of Comparative Example 1 (V1) 32, which is constructed analogously, 0% by weight, based on the total recipe.
  • V1 Comparative Example 1
  • a reduction of the emission to 2.6 mg / hm2 in Example 1 is expected based on the emission values of Comparative Example 1 (V1) (3.0 mg / hm2) however, a significantly greater reduction in formaldehyde emissions to 2.3 mg / hm2 in Example 1.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (11)

  1. Procédé de revêtement de feuilles de finition et de bords continus, lors duquel
    I) on applique une composition aqueuse de revêtement, qui en tant que composant de laque I contient
    A) de 15 à 55 % en poids, de préférence de 30 à 45 % en poids d'une ou de plusieurs résines de mélamine diluables à l'eau,
    B) de 0 à 30 % en poids, de préférence de 0 à 15 % en poids d'une ou de plusieurs résines d'urée, diluables à l'eau,
    C) de 5 à 55 % en poids, de préférence de 20 à 40 % en poids d'un ou de plusieurs polyols,
    D) de 0 à 15 % en poids, de préférence de 3 à 10 % en poids d'une dispersion aqueuse autoréticulante de polyacrylates et
    E) d'autres composants,
       la somme des proportions pondérales des composants A à E se montant dans chaque cas à 100 % en poids, et la composition de revêtement en tant que composant de laque II contenant, sur la base du poids de la somme des composants A à E, de 0,5 à 30 % en poids d'un catalyseur de durcissement acide, les composants de laque I et II étant de préférence mélangés immédiatement avant application et
    II) le film humide résultant étant cuit à une température comprise entre 90 et 200°C pendant une période de 8 à 50 secondes,
       caractérisé en ce que le composant de laque I en tant que composant E contient de 5 à 20 % en poids, de préférence de 7 à 15 % en poids d'une ou de plusieurs charges ayant une grandeur moyenne de particules de 0,015 à 10 »m, une grandeur maximale de particules de ≦ 40 »m et une densité de ≦ 2,9 g/cm³.
  2. Composition de revêtement aqueuse, en particulier pour le revêtement de feuilles de finition et de bords continus, qui en tant que composant de laque (I) contient
    A) de 15 à 55 % en poids, de préférence de 30 à 45 % en poids d'une ou de plusieurs résines de mélamine diluables à l'eau,
    B) de 0 à 30 % en poids, de préférence de 0 à 15 % en poids d'une ou de plusieurs résines d'urée, diluables à l'eau,
    C) de 5 à 55 % en poids, de préférence de 20 à 40 % en poids d'un ou de plusieurs polyols,
    D) de 0 à 15 % en poids, de préférence de 3 à 10 % en poids d'une dispersion aqueuse autoréticulante de polyacrylates et
    E) d'autres composants,
       la somme des proportions pondérales des composants A à E se montant dans chaque cas à 100 % en poids, et la composition de revêtement en tant que composant de laque II contenant, sur la base du poids de la somme des composants A à E, de 0,5 à 30 % en poids d'un catalyseur de durcissement acide, les composants de laque I et II étant de préférence mélangés immédiatement avant application,
       caractérisé en ce que le composant de laque I en tant que composant E contient de 5 à 20 % en poids, de préférence de 7 à 15 % en poids d'une ou de plusieurs charges ayant une grandeur moyenne de particules de 0,015 à 10 »m, une grandeur maximale de particules de ≦ 40 »m et une densité de ≦ 2,9 g/cm³.
  3. Procédé ou composition de revêtement selon la revendication 1 ou 2, caractérisé en ce que l'on utilise, en tant que composant E des charges ayant une grandeur moyenne de particules de 0,015 à 8 »m, une grandeur maximale de particules de ≦ 20 »m et une densité de ≦ 2,8 g/cm³,.
  4. Procédé ou composition de revêtement selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on utilise en tant que composant E des charges lamellaires.
  5. Procédé ou composition de revêtement selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'on utilise en tant que composant E des types de talc, de mica et/ou de kaolin.
  6. Procédé ou composition de revêtement selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'on utilise en tant que composant A des résines mélamine-formaldéhyde, éthérées au méthanol, diluables à l'eau.
  7. Procédé ou composition de revêtement selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le composant de laque II contient en tant que catalyseur de durcissement de l'acide para-toluènesulfonique ou des solutions d'acide para-toluènesulfonique dans des dispersions d'acrylates stables aux acides.
  8. Procédé ou composition de revêtement selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'on utilise en tant que composant C un mélange fait d'un triol et d'un polyesterpolyol.
  9. Procédé ou composition de revêtement selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la composition de revêtement contient des additifs et adjuvants habituels ainsi que, le cas échéant, des pigments.
  10. Feuille de finition ou bord continu, caractérisé en ce qu'elle/il a été revêtu(e) conformément à l'un des procédés selon la revendication 1 et les revendications 3 à 9.
  11. Utilisation des feuilles de finition ou des bords continus selon la revendication 10 pour collage avec des panneaux en bois reconstitué ou des panneaux durs stratifiés en fibres.
EP90200247A 1989-02-21 1990-01-26 Procédé de revêtement de feuilles de finition et de bandes sans fin Expired - Lifetime EP0384506B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3905268A DE3905268A1 (de) 1989-02-21 1989-02-21 Verfahren zum beschichten von finish-folien und endloskanten
DE3905268 1989-02-21

Publications (2)

Publication Number Publication Date
EP0384506A1 EP0384506A1 (fr) 1990-08-29
EP0384506B1 true EP0384506B1 (fr) 1994-07-20

Family

ID=6374572

Family Applications (2)

Application Number Title Priority Date Filing Date
EP90200247A Expired - Lifetime EP0384506B1 (fr) 1989-02-21 1990-01-26 Procédé de revêtement de feuilles de finition et de bandes sans fin
EP90901812A Pending EP0459991A1 (fr) 1989-02-21 1990-01-26 Procede de revetement de pellicules finies et de bords sans fin

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP90901812A Pending EP0459991A1 (fr) 1989-02-21 1990-01-26 Procede de revetement de pellicules finies et de bords sans fin

Country Status (10)

Country Link
US (1) US5223323A (fr)
EP (2) EP0384506B1 (fr)
AT (1) ATE108843T1 (fr)
AU (1) AU633046B2 (fr)
BR (1) BR9007150A (fr)
CA (1) CA2046873C (fr)
DE (2) DE3905268A1 (fr)
DK (1) DK0384506T3 (fr)
ES (1) ES2060920T3 (fr)
WO (1) WO1990010111A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4024835A1 (de) * 1990-08-04 1992-02-06 Basf Lacke & Farben Waessrige beschichtungszusammensetzung, insbesondere zur beschichtung von finish-folien und endloskanten sowie verfahren zum beschichten von finish-folien und endloskanten
DE4413242A1 (de) * 1994-04-16 1995-10-19 Basf Lacke & Farben Verfahren zur Herstellung von Gegenständen mit dreidimensionaler Oberflächenstruktur und nach diesem Verfahren hergestellte Gegenstände
US6077593A (en) * 1998-04-17 2000-06-20 Armstrong World Industries, Inc. Durable edge ceiling board
DE19861030A1 (de) 1998-11-10 2000-05-11 Permatex Gmbh Pulver-Zusammensetzung zur Herstellung wäßriger Überzugsmittel
US6620500B2 (en) 2000-01-07 2003-09-16 Precision Coatings, Inc. Dry erase member
DE10021849A1 (de) 2000-05-05 2001-11-08 Solutia Germany Gmbh & Co Kg Aminoharzgemisch zur Herstellung von Folien und Kanten mit reduzierter Formaldehydabspaltung
WO2006089972A2 (fr) * 2005-02-28 2006-08-31 Basf Aktiengesellschaft Melanges de resine amino modifiee, films de resines amino modifies et utilisations de polyalkyleneglycols, de leurs derives et/ou de polyamides alkoxyles utilises en tant qu'agents adhesifs sur des surfaces en plastique
DE102013014683A1 (de) 2013-09-05 2015-03-05 Mankiewicz Gebr. & Co. Gmbh & Co. Kg Beschichtungsstoffe und deren Verwendung in Beschichtungssystemen für Bauteile in Fahrzeuginnenräumen
KR20190104400A (ko) 2017-01-19 2019-09-09 오픈 모노클로날 테크놀로지, 인코포레이티드 다중 중쇄 면역글로불린 유전자좌를 갖는 트랜스제닉 설치류 기원의 인간 항체

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Publication number Priority date Publication date Assignee Title
US3994851A (en) * 1972-10-26 1976-11-30 Ppg Industries, Inc. High solids polyester coating composition
DE2539104C3 (de) * 1975-09-03 1986-07-10 Basf Ag, 6700 Ludwigshafen Lösungsmittelarme Einbrennlacke
DE2604915C3 (de) * 1976-02-07 1980-03-06 Th. Goldschmidt Ag, 4300 Essen Verfahren zur Herstellung eines dem Druckbild entsprechende Poren oder Strukturen aufweisenden sogenannten Fertigeffektfilmes
DE3024391A1 (de) * 1980-06-28 1982-01-28 Letron GmbH, 8750 Aschaffenburg Verfahren zur herstellung von folien aus bedruckten dekorpapieren
US4303581A (en) * 1980-07-16 1981-12-01 Ppg Industries, Inc. Water dispersed primer-surfacer composition
DE3610764C2 (de) * 1986-03-29 1995-05-18 Basf Lacke & Farben Verfahren zur einschichtigen Beschichtung von Finish-Folien und Endloskanten
DE3610732C2 (de) * 1986-03-29 1995-05-18 Basf Lacke & Farben Verfahren zur einschichtigen Beschichtung von Finish-Folien und Endloskanten
US4708984A (en) * 1986-05-16 1987-11-24 American Cyanamid Company Beta-hydroxyalkylcarbamyl-methylated aminotrizines and curable compositions containing the same
DE3705255C2 (de) * 1987-02-19 1995-06-22 Basf Lacke & Farben Wäßrige Zweikomponentenlacke zur einschichtigen Beschichtung von hochresistenten Finish-Folien und Endloskanten

Also Published As

Publication number Publication date
AU4957490A (en) 1990-09-26
ES2060920T3 (es) 1994-12-01
WO1990010111A1 (fr) 1990-09-07
BR9007150A (pt) 1992-01-28
US5223323A (en) 1993-06-29
DE3905268A1 (de) 1990-08-23
ATE108843T1 (de) 1994-08-15
DE59006462D1 (de) 1994-08-25
EP0459991A1 (fr) 1991-12-11
CA2046873A1 (fr) 1990-08-22
EP0384506A1 (fr) 1990-08-29
CA2046873C (fr) 1998-06-30
DK0384506T3 (da) 1994-11-14
AU633046B2 (en) 1993-01-21

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