EP1899427A1 - Panneaux de bois de teinte claire - Google Patents

Panneaux de bois de teinte claire

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Publication number
EP1899427A1
EP1899427A1 EP06777443A EP06777443A EP1899427A1 EP 1899427 A1 EP1899427 A1 EP 1899427A1 EP 06777443 A EP06777443 A EP 06777443A EP 06777443 A EP06777443 A EP 06777443A EP 1899427 A1 EP1899427 A1 EP 1899427A1
Authority
EP
European Patent Office
Prior art keywords
wood
pigment
acid
pigments
acids
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.)
Withdrawn
Application number
EP06777443A
Other languages
German (de)
English (en)
Inventor
Andres Carlos Garcia Espino
Juliane Krüsemann
Norbert Jäger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE200510030788 external-priority patent/DE102005030788A1/de
Priority claimed from DE200610009479 external-priority patent/DE102006009479A1/de
Application filed by BASF SE filed Critical BASF SE
Publication of EP1899427A1 publication Critical patent/EP1899427A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D15/00—Woodstains

Definitions

  • the present invention relates to light colored engineered wood panels made from wood fibers bleached and dyed with liquid colorant formulations containing at least one pigment and at least one dye which absorbs in the visible region of the electromagnetic spectrum.
  • the invention relates to the use of these wood-based panels for the production of furnishings and furnishings that contain these wood-based panels.
  • MDF panels medium-density fibreboards
  • HDF panels high-density fibreboards
  • MDF and HDF boards can be processed like conventional chipboard. Due to their uniform structure, they are also suitable for the production of profiled parts and are therefore becoming increasingly popular in furniture construction. Thus, for example, furnishings for rooms and for decorative purposes (for example, in trade fair construction), but also higher-quality furniture made from these plates and then, in order to preserve the wood-like structure visible, only colorless or coated with overlay.
  • Wood-based panels in particular MDF panels, which have bright bright shades (L * ⁇ 75) even at high depths of color, for example yellow or orange, or are dyed to a shallow depth of shade, ie pastel shades, eg a neutral gray, are not yet known.
  • L * ⁇ 75 bright bright shades
  • JP-A-55-164142 particleboard are described, which are made of Hofzschnitzeln, which were first oxidatively bleached with sodium chlorite and then dyed with a direct dye. The bleaching is done here to improve the fürstobles- the wood chips, and it should be produced strong colors.
  • unpublished DE-A-10 2004 050 278 describes light to white wood-based panels made of bleached wood fibers and / or mass colored with a white pigment.
  • the invention therefore an object of the invention to provide light-colored wood-based panels available
  • wood-based panels which are made of wood fibers, which are bleached and dyed with liquid, pigment and dye-containing colorant preparations.
  • the wood-based panels according to the invention are distinguished by their pure, bright shades. These can be "white” mixed pastel shades, which can be obtained by dyeing in a standard color depth of ⁇ 1/9, in particular of ⁇ 1/25, or strong shades with brightness values L * > 75.
  • the wood-based panels according to the invention are e.g. MDF or HDF boards or chipboards, MDF boards are particularly preferred.
  • MDF and HDF boards are usually produced in a continuous process. This washed, water-moist, small chopped pieces of wood (wood chips) are first preheated to about 8O 0 C and then in a digester under a pressure of 2 to 5 bar and a temperature of 100 to 150 0 C geweicht. In the adjoining refiner the wood chips are then shredded.
  • the refiner consists of two metal discs with radial relief, which rotate close to each other in the opposite direction. The fibers write the refiner on the so-called blowline.
  • the glue is usually applied.
  • Urea-formaldehyde resins sometimes reinforced with melamine, or urea-melamine-formaldehyde resins for moisture-resistant boards, are usually used as binders.
  • Isocyanates are also used as binders.
  • the binders are usually applied to the fibers together with the desired additives (eg hardener, paraffin dispersion, colorant).
  • the glued fibers then pass through a dryer in which they are dried to humidities of 8 to 15 wt .-%. Occasionally, the dried fibers are also subsequently glued in special, continuously operating mixers. For chipboard production, the pre-dried chips are glued in continuous mixers.
  • the glued fibers or chips are then poured into mats, where appropriate ka t precompressed and pressed in a heated press at temperatures of 170-240 0 C to form plates.
  • Preferred base materials are light wood species, especially spruce or pine, but darker woods such as beech can also be used.
  • wood fibers used in the wood-based panels according to the invention are bleached
  • the coloring impurities of the wood are destroyed or rendered ineffective by oxidizing and / or reducing chemicals.
  • oxidative bleaching e.g. Hydrogen peroxide, ozone, oxygen, salts of halo-oxygen acids, such as chlorites, and salts of organic and inorganic peracids, such as peracetates, percarbonates and perborates, especially their alkali metal salts, in particular sodium salts, wherein the percarbonates and hydrogen peroxide are preferred.
  • reductive bleaching e.g.
  • reducing sulfur compounds such as dithionites, disulphites, sulfites or sulfur dioxide, sulfinic acids and their salts, in particular the alkali metal salts and, in particular, the sodium salts, and hydroxycarboxylic acids, such as citric acid and malic acid.
  • Preferred reducing agents are the disulfides and sulfites, in particular sodium hydrogen sulfite, as well as malic and citric acid.
  • wood fibers which have been firstly oxidatively and then reductively bleached are particularly preferred.
  • the oxidative bleaching is carried out with percarbonates or hydrogen peroxide and the reductive bleaching with sulfites or malic or citric acid.
  • bleaching is expediently carried out in such a way that aqueous, 5 to 40% by weight wood fiber dispersions are continuously poured into countercurrent at temperatures of 90 to 15O 0 C and pressures up to 3 bar treated with aqueous solutions or dispersions of bleach.
  • it is carried out in the presence of complexing agents, such as EDTA, to avoid the degradation of the bleaching agents by transition metal ions.
  • the bleaching of the fibers can be advantageously carried out during the board production.
  • the bleaching agents can be added to the wood chips in the preheater or in the cooker. Preferably also Kompiexsentner be added.
  • the wood fibers used in the wood-based panels according to the invention are dyed after bleaching with liquid colorant preparations containing at least one pigment and at least one in the visible range of the electromagnetic spectrum absorbing dye.
  • These colorant preparations generally contain 0.01 to 10 wt .-%, preferably 0.5 to 10 wt .-% of dye, based on the pigment.
  • colorant preparations particularly preferably contain
  • organic or inorganic pigments may be present in the colorant preparations.
  • the colorant preparations can also contain mixtures of various organic or various inorganic pigments or mixtures of organic and inorganic pigments.
  • the pigments are preferably present in finely divided form and accordingly usually have average particle sizes of 0.1 to 5 .mu.m, in particular 0.1 to 3 .mu.m and especially 0.1 to 1 .mu.m.
  • the organic pigments are usually organic colored and black pigments.
  • Inorganic pigments may also be color pigments (color, black and white pigments) and luster pigments.
  • Dtsazocondensation pigments Cl. Pigment Yetlow 93, 95 and 128;
  • Anthraquinone pigments Cl. Pigment Yellow 147, 177 and 199; Cl. Pigment Violet 31;
  • Anthrapyrimidine pigments Cl. Pigment Yellow 108;
  • Diketopyrrolopyrrole Pimgente Cl. Pigment Orange 71, 73 and 81;
  • Flavanthrone pigments Cl. Pigment Yeliow 24;
  • Indanthrope pigments CJ. Pigment Blue 60 and 64;
  • Phthalocyanine pigments Cl. Pigment Blue 15, 15: 1, 15: 2, 15: 3, 15: 4, 15: 6 and 16;
  • Suitable inorganic color pigments are, for example:
  • White pigments titanium dioxide (CJ Pigment White 6), zinc white, colored zinc oxide;
  • Black pigments iron oxide black (CI Pigment Black 11), iron manganese black, spin black (CI Pigment Black 27); Carbon black (Cl.
  • Cobalt blue (CI Pigment Blue 28 and 36; CI Pigment Blue 72); Ultramarine blue; Manganese blue;
  • CJ Pigment Red 101 Iron oxide red
  • Cadmium sulphoselenide CI Pigment Red 108
  • Cerium sulphide CJ Pigment Red 265
  • Molybdate red CI Pigment Red 104
  • Iron oxide brown (CJ Pigment Brown 6 and 7), mixed brown
  • Cerium sulphide (CJ Pigment Orange 75);
  • Iron oxide yellow (CJ Pigment Yellow 42); Cotenite yellow (CJ Pigment Yeow 53, CI Pigment Yellow 157, 158, 159, 160, 161, 162, 163, 164 and 189); Chromium titanium yellow; Spinel phases (CI Pigment Yellow 119); Cadmium suicide and cadmium zinc sulfide (CJ Pigment Yellow 37 and 35); Chrome yellow (CJ Pigment Yellow 34); Bismuth vanadate (CJ Pigment Yellow 184).
  • the luster pigments are single-phase or multi-phase pixiliferous pigments whose color palette is characterized by the interplay of interference, reflection and absorption phenomena. Examples include aluminum flakes and one or more times, in particular aluminum oxide, iron oxide and mica flakes coated with metal oxides.
  • the colorant preparations contain from 10 to 70% by weight, preferably from 10 to 60% by weight, of pigment (A).
  • the colorant formulations contain at least one visible spectrum of the electromagnetic spectrum absorbing dye from the group of cationic dyes, anionic dyes and disperse dyes.
  • Particularly suitable dyes are those which are soluble in water or in a water-miscible or water-soluble organic solvent.
  • the dyes used (B) to the pigments (A) in each case comparable hue, since in this way a particularly intense coloration of the wood-based panels can be achieved even in light shades.
  • colorants (B) which deviate in color, as a result of which nuances of the coloration are possible.
  • cationic dyes particularly suitable are cationic dyes, anionic dyes and Disperstonsfarbstoffe.
  • direct dyes and disperse dyes are particularly suitable.
  • Suitable cationic dyes (B) are derived in particular from the di- and triary methane, xanthene, azo, cyanine, azacyanine, methine, acridine, safranine, oxazine, induline, nigrosine and phenazine series , wherein dyes from the azo, triarylmethane and xanthene series are preferred.
  • Cationic dyes (B) may also be colorants containing external basic groups. Suitable examples are here Ci. Basic Blue 15 and 161.
  • cationic dyes (B) it is also possible to use the corresponding color bases in the presence of solubilizing acidic agents. Examples given are: Cl. Solvent Yellow 34; Cl. Solvent orange 3; Cl. Solvent Red 49; Cl. Solvent Violet 8 and 9; Cl. Solvent Blue 2 and 4; Cl. Solvent Black 7.
  • Suitable anionic dyes are, in particular, sulfonic acid-containing compounds from the series of the azo, anthraquinone, metalic complex, triarylmethane, xanthene and stilbene series, dyes of the triarylmethane, azo and metal complex (especially copper, chromium and cobalt complex -) are preferred.
  • These dyes are especially water-soluble if they are present as alkali metal salt, especially lithium, sodium or potassium salt, or as unsubstituted or substituted ammonium salt, especially alkanolammonium salt.
  • Dispersäonsfarbstoffe are preferably used in the form of commercially available, aqueous dispersions and unfold their coloring effect in the manufacturing process of wood-based panels by diffusion at high temperatures.
  • Disperse dyes from the series of quinophthalones and anthraquinones are particularly suitable.
  • the colorant preparations contain the dye (B) generally in amounts of from 0.5 to 10% by weight, preferably from 1 to 8% by weight, in each case based on the pigment (A). Based on the total weight of the preparation, this corresponds to amounts of generally 0.05 to 7 wt .-%, especially 0.1 to 5.6 wt .-%.
  • Preferred pigment / dye combinations for light shades are, for example: Cl. Pigment Orange 34 and Cl. Direct Yellow 11; C I. Pigment Yeilow 74 and Cl. Direct Yellow 4.
  • Pure bright pastel shades are particularly by mixing white pigments, especially Cl. Pigment White 6, with nuanced color pigments, e.g. Cl. Pigment Black 7 and Cl. Basic Violet 3, to get. Heal shades of gray can advantageously also be obtained by shading the wetting pigment with appropriate dyes, e.g. blue dyes, such as Cl. Direct Blue 47, 67, 267 and 279, and / or violet dyes such as CJ. Direct Violet 35 and 51, and optionally yellow dyes, such as Ci. Direct Yeiiow 4, to be achieved.
  • the proportion of the white pigment is usually in each case 80 to 99 wt .-%, based on the total colorant amount.
  • At least one dispersing agent is contained in the colorant preparations.
  • Particularly suitable dispersants (C) are nonionic and anionic water-soluble surface-active additives.
  • nonionic additives (C) are based on polyethers (additives (C1)).
  • Enoxiden especially polyethylene oxides, polypropylene oxides, and poly (phenylethylenoxiden), here in particular block copolymers, in particular Poiypropylenoxid- and polyethylene oxide blocks or polymers comprising poly (phenylethylene oxide) and polyethylene oxide blocks, and also random copolymers of these alkylene oxides.
  • polyalkylene oxides can be substituted by polyaddition of the alkylene oxides onto starter molecules, such as saturated or unsaturated aliphatic and aromatic alcohols, phenol or naphthol, each substituted by alkyl, in particular C 1 -C 2 -cycloalkyl, preferably C 4 -C 2 2 or C 1 -C 4 -alkyl may be prepared, saturated or unsaturated aliphatic and aromatic amines, saturated or unsaturated aliphatic carboxylic acids and carboxylic acid amides. Usually, 1 to 300 mol, preferably 3 to 150 mol, of alkylene oxide per mo! Starter molecule used.
  • starter molecules such as saturated or unsaturated aliphatic and aromatic alcohols, phenol or naphthol, each substituted by alkyl, in particular C 1 -C 2 -cycloalkyl, preferably C 4 -C 2 2 or C 1 -C 4 -alkyl may be prepared, saturated or unsaturated aliphatic and
  • Suitable aliphatic alcohols generally contain 6 to 26 C atoms, preferably 8 to 18 C atoms, and may be unbranched, branched or cyclic. Examples which may be mentioned are octanol, nonanol, decanol, isodecanoi, undecanol, dodecanol, 2-butyloctanol, tridecanol, isotridecanol, tetradecanol, pentadecanol, hexadecanol (cetyl alcohol), 2-hexy!
  • the saturated and unsaturated fatty alcohols which are obtained through the addition of fat and reduction from natural raw materials, and the synthetic fatty alcohols from the oxo process.
  • the alkylene oxide adducts to these alcohols usually have average molecular weights M n of from 200 to 5,000.
  • aromatic alcohols examples include, in addition to unsubstituted phenol and .alpha.- and .beta.-naphthol, hexylphenol, heptyiphe ⁇ ol, octylphenof, nonynphenol, isononiphenol, undecylphenol, dodecylphenol, di- and tributhenol and dinonylphenol! called.
  • Suitable aliphatic amines correspond to the aliphatic alcohols listed above. Of particular importance are the saturated and unsaturated fatty acids. amines, which preferably have 14 to 20 carbon atoms. Examples of aromatic amines are aniline and its derivatives.
  • aliphatic carboxylic acids are particularly suitable saturated and unsaturated fatty acids, preferably containing 14 to 20 carbon atoms, and hydrogenated, partially hydrogenated and unhydrogenated resin acids, as well as polybasic carboxylic acids, e.g. Dicarboxylic acids, such as maleic acid.
  • Suitable carboxylic acid amides are derived from these carboxylic acids.
  • the alkylene oxide adducts to the monohydric amines and alcohols are of very particular interest,
  • bifunctional amines which are in particular of the formula H 2 N- (R 1 -NR 2 ) n -H (R 1 : C 2 -C 6 -alkyl, R 2 : hydrogen or d-ce) Alkyl; n: 1 to 5).
  • ethylenediamine diethylenetriamine, triethylenetetramine, tetraethylenepentamine, propylenediamine-1,3-dipropylenetriamine, 3-amino-1-ethyleneaminopropane, hexamethylenediamine, dihexamethylenediamine, 1,6-bis (3-aminopropyl) amino ) hexane and N-Methyidtpropylent ⁇ amin, with hexamethylenediamine and diethylenetriamine are particularly preferred and ethylenediamine is very particularly preferred.
  • these amines are first reacted with propylene oxide and then with ethylene oxide.
  • the content of the B ⁇ ockcopolymerisate of ethylene oxide is usually about 10 to 90 wt .-%.
  • the polybasic amine-based block copolymers generally have average molecular weights M n of from 1,000 to 40,000, preferably from 1,500 to 30,000.
  • di- to pentahydric alcohols are preferred.
  • examples are C 2 -C 6 -alkylene glycols and the corresponding di- and polyalkylene glycols, such as ethylene glycol, propylene glycol-1, 2 and 1,3, butylene glycol-1,2 and -1,4, hexylene glycol-1,6 Dipropylene glycol and polyethylene glycol, glycerol and pentaerythritol, ethylene glycol and polyethylene glycol being particularly preferred, and propylene glycol! and dipropylene glycol are most preferred.
  • Particularly preferred Alkylenoxidaddukte to at least bifunctional alcohols have a central Polypropyienoxidblock, so go from a Propylengiykol or poly propylene glycol, which is reacted first with more propylene oxide and then with ethylene oxide.
  • the content of the block copolymers of ethylene oxide is usually from 10 to 90% by weight.
  • the polyhydric alcohol block copolymers generally have average molecular weights M n of from 1,000 to 20,000, preferably from 1,000 to 15,000.
  • AI kyienoxid block copolymers are known and commercially available, for example under the name Tetronic ® and Pluronic ® (BASF).
  • water-soluble anionic surface active agents which are particularly suitable as component (C) are additives based on polymers of ethylenically unsaturated carboxylic acids (C2), additives based on polyurethanes (C3) and additives based on acidic phosphoric acid, phosphonic acid, Sulfuric acid and / or Sulfonklam the above polyether (C4) mentioned.
  • mixtures of several additives that is to say both mixtures of different nonionic additives and mixtures of various anionic additives and also mixtures of nonionic and anionic additives.
  • Suitable anionic, water-soluble surface-active additives based on polymers of unsaturated carboxylic acids (C2) are, in particular, additives from the group of the homopolymers and copolymers of ethylenically unsaturated monocarboxylic acids and / or ethylenically unsaturated dicarboxylic acids which additionally contain polymerized vinyl monomers which contain no acid function can, the alkoxylation of these homo- and copolymers and the salts of these homo- and copolymers and their Aikoxyljêts occur.
  • Vinyl aromatics such as styrene, methylstyrene and vinyltoluene; Ethylene, propylene, isobutene, diisobutene and butadiene; Vinyl ethers, such as polyethylene glycol monovinyl ether; Vinyl esters of linear or branched monocarboxylic acids, such as vinyl acetate and vinyl propionate; Alkyl esters and aryl esters of ethylenically unsaturated monocarboxylic acids, in particular acrylic and methacrylic acid esters, such as methyl, ethyl, propyl, isopropyl, butyl, pentyl, hexyl, 2-ethylhexyl, nonyl, lauryl and hydroxycarboxylic acids; xyethyl (meth) acrylate and phenyl, naphthyl and benzyl (meth) acrylate; Dialkyl esters of ethylen
  • Examples of preferred homopolymers of these monomers are, in particular, polyacrylic acids.
  • the copolymers of the monomers mentioned may be composed of two or more, in particular three, different monomers. They may be random copolymers, alternating copolymers, block copolymers and graft copolymers.
  • Preferred copolymers are styrene / acrylic acid, acrylic acid / maleic acid, acrylic acid / methacrylic acid, butadiene / acrylic acid, isobutene / maleic acid, diisobutene / maleic acid and styrene / malonic acid copolymers, which are each acrylic acid ester as additional monomer constituents and / or or maleic acid esters may be mentioned.
  • the carboxyl groups of the non-alkoxylated homopolymers and copolymers are at least partially in salt form in order to ensure water-solubility.
  • Suitable examples are the Aikalimetallsalze, such as sodium and potassium salts, and the ammonium salts.
  • the non-aoxylated polymeric additives (C2) have average molecular weights M w of from 900 to 250,000.
  • molecular weight data are given by way of example for various polymers: polyacrylic acids: M w from 900 to 250,000; Styrene / acrylic acid copolymers: M w from 1 000 to 50 000; Acrylic acid / methacrylic acid copolymers: M w from 1,000 to 250,000; Acrylic acid / maleic acid copolymers: M w from 2,000 to 70,000.
  • these include in particular the partially to (as far as is possible) completely polymerized with polyether alcohols polymers.
  • the degree of esterification of these polymers is 30 to 80 mol%.
  • polyether alcohols themselves, preferably polyethylene glycols and polypropylene glycols, and their one-sided end group-capped derivatives, in particular the corresponding monoethers, such as monoarylethers, eg monophenyiethers, and in particular mono-C 1 -C -alkyl ethers, for example ethylenediols and propyleneglycols etherified with fatty alcohols, and the polyetheramines which are obtained, for example, by conversion of a terminal OH- Group of the corresponding Pofyetherai- alcohols or by Poiyadd ⁇ tion of alkylene oxides to preferably primary aliphatic see amines can be produced.
  • Polyethylene glycols, polyethylene glycol ethers and polyether amines are preferred.
  • the average molecular weights M n of the polyether alcohols and their derivatives used are usually 200 to 10,000.
  • the surface-active properties of the additives (C2) can be adjusted in a targeted manner.
  • anionic surface-active additives are also known and commercially available for example under the name Sokalan ® (BASF), Joncryl ® ⁇ Johnson Polymer), Aicosperse ® (Alco), Geropon ® (Rhodia), Good-Rite ® (Goodrich) Neoresin ® (Avecia), Orotan ® and Morez ® (Rohm & Haas), Disperbyk ® (Byk) and Tegospers ® (Goldschmidt) available.
  • the pigment preparations according to the invention may furthermore contain polyurethane-based additives (C3).
  • polyurethane is to be understood as meaning not only the pure reaction products of polyfunctional isocyanates (C3a) with isocyanate-reactive organic compounds (C3b) containing isocyanate-reactive groups, but also those reaction products obtained by the addition of further isocyanate-reactive compounds, e.g. of primary or secondary amino-bearing carboxylic acids are additionally functionalized.
  • additives are distinguished from other surface-active additives by their low ionic conductivity and their neutral pH.
  • Suitable polyfunctional isocyanates (C3a) for the preparation of the additives (C3) are in particular diisocyanates, but it is also possible to use compounds having three or four isocyanate groups. Both aromatic and aliphatic isocyanates can be used.
  • di- and triisocyanates examples include: 2,4-tolylene diisocyanate (2,4-TDI), 4,4'-diphenylmethane diisocyanate (4,4'-MDI), para-xylylene diisocyanate, 1,4-diisocyanatobenzene , Tetramethylxiyl diisocyanate (TMXDI), 2,4'-diphenylmethane diisocyanate (2,4'-MDI) and triisocyanatotoluene and isophorone diisocyanate (IPDI),
  • mixtures of isocyanates can also be used.
  • mixtures of structural isomers of 2,4-toluene diisocyanate and triisocyanato toluene e.g. Mixtures of 80% by mole of 2,4-tolylene diisocyanate and 20% by mole of 2,6-toluethylene diisocyanate; Mixtures of cis- and trans-cyclohexane-1,4-diisocyanate; Mixtures of 2,4- or 2,6-tofuylene diisocyanate with aliphatic diisocyanates such as hexamethylene diisocyanate and isophorone diisocyanate.
  • Suitable isocyanate-reactive organic compounds (C3b) are preferably compounds having at least two isocyanate-reactive hydroxyl groups per molecule. However, suitable compounds (C3b) are also compounds which have only one isocyanate-reactive hydroxy group per molecule. These m ⁇ ofunktionaüsäerten compounds, the at least two isoeyanatreepte hydroxy groups per molecule containing compounds in the reaction with the polyisocyanate (C3a) partially or completely replace.
  • C3b particularly preferred isocyanate-reactive compounds having at least two isocyanate-reactive hydroxy groups per molecule.
  • polyethers polyesterdiols, lactone-based polyesterdiols, diols and triols having up to 12 carbon atoms, dihydroxycarboxylic acids, dihydroxysulphonic acids, dihydroxyphosphonic acids, polycarbonatediols, polyhydroxyolefans and polysialoxanes having on average at least two hydroxyl groups per molecule.
  • Suitable polyethers (C3b) are, for example, homopolymers and copolymers of C 2 -C 4 -alkylene oxides, such as ethylene oxide, propylene oxide and butylene oxide, tetrahydrofuran, styrene oxide and / or epichlorohydrin, which are reacted in the presence of a suitable catalyst, e.g. Boron trifluoride, are available. Further suitable polyethers are by (co) polymerization of these compounds in the presence of a starter having at least two normal hydrogen atoms, e.g.
  • polyethers (C3b) are polyethylene glycol, polypropylene glycol, polybutylene glycol and polytetrahydrofuran, and also copolymers thereof.
  • the molecular weight M n of the polyether diols is preferably 250 to 5,000, more preferably 500 to 2,500.
  • Polyester diols (hydroxypolyesters) suitable as isocyanate-reactive compound (C3b) are well known.
  • Preferred polyester dioxides (C3b) are the reaction products of diols with dicarboxylic acids or their reactive derivatives, e.g. Anhydrides or dimethyesters.
  • Suitable dicarboxylic acids are saturated and unsaturated aliphatic and aromatic dicarboxylic acids which may carry additional substituents, such as halogen.
  • Preferred aliphatic dicarboxylic acids are saturated unbranched ⁇ , ⁇ -dicarboxylic acids containing 3 to 22, especially 4 to 12, carbon atoms.
  • dicarboxylic acids examples include: succinic acid, glutaric acid, adipic acid, suberic acid, sebacic acid, 1,12-dodecanedicarboxylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, phthalic acid, isophthalic acid, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, tetrachlorophthalic anhydride, endomethylenetetrahydrophthalic anhydride - drid, terephthalic acid, terephthalic acid dimethyl ester and isophthalic acid dimethylester.
  • Particularly suitable diols are saturated and unsaturated aliphatic and cycloaliphatic diols.
  • the particularly preferred aliphatic ⁇ . ⁇ -Dioie are unbranched and have 2 to 12, in particular 2 to 8, especially 2 to 4 C-atoms.
  • Preferred cycloaliphatic dioxides are derived from cyclohexane.
  • diols examples include: ethylene glycol, propylene glycol, 1,3-propanediol, 1,4-butanediol, 2-methylpropane-1,3-diol, 1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, 1 , 8-octanediol, 1,10-decanediol, 1,12-dodecanediol, cis- and trans-but-2-ene-1, 4-diol, 2-butyne-1, 4-dioi and cis- and trans-1 , 4-di (hydroxymethyl) cyclohexane.
  • the molecular weight M n of the polyester film is preferably 300 to 5,000.
  • Lactone-based polyester diols suitable as isocyanate-reactive compound (C3b) are based in particular on aliphatic saturated unbranched ⁇ -hydroxycarboxylic acids having 4 to 22, preferably 4 to 8, carbon atoms. Also suitable are branched ⁇ - hydroxy carboxylic acids in which one or more -CH 2 groups in the alkylene chain by -CH (Ci-C 4 alkyl) - are replaced.
  • ⁇ -hydroxycarboxylic acids examples include ⁇ -hydroxybutyric acid and ⁇ -hydroxyvaleric acid.
  • Dioie a isocyanate-reactive compounds (C3b), where the same preferences apply as above,
  • isocyanate-reactive compounds C3b
  • triols which, in particular, have 3 to 12, above all 3 to 8 C atoms. Step Example! a particularly suitable triol is trimethylolpropane.
  • Dihydroxycarboxylic acids which are suitable as isocyanate-reactive compounds (C3b) are, in particular, particularly suitable aiiphatic saturated dihydroxycarboxylic acids which preferably contain 4 to 14 C atoms. Especially suitable are dihydroxycarboxylic acids of the formula
  • a 1 and A 2 are the same or different C 1 -C 4 -alkylene radicals and R is hydrogen or C 1 -C 4 -alkyl.
  • DMPA dimethylolpropionic acid
  • isocyanate-reactive compounds C3b
  • dihydroxysulfonic acids and dihydroxyphosphonic acids such as 2,3-dihydroxypropane-phosphonic acid.
  • dihydroxycarboxylic acid is intended to include compounds which contain more than one carboxyl function (or anhydride or ester function). Such compounds are obtainable by reacting dihydroxy compounds with tetracarboxylic dianhydrides, such as pyromelitic dianhydride or cyclopentanetetracarboxylic dianhydride, in a molar ratio of 2: 1 to 1:05 in a polyaddition reaction and preferably have an average molecular weight M n of from 500 to 10,000.
  • tetracarboxylic dianhydrides such as pyromelitic dianhydride or cyclopentanetetracarboxylic dianhydride
  • Suitable polycarbonate diols (C3b) are the reaction products of phosgene with an excess of diols, in particular unbranched saturated aliphatic ⁇ , ⁇ -diols having 2 to 12, especially 2 to 8, especially 2 to 4 carbon atoms.
  • Suitable as isocyanate-reactive compound (C3b) are polyhydroxyolefins ⁇ before aiiern, ⁇ -dihydroxy olefins, said ⁇ - ⁇ f dihydroxybutadienes are preferred.
  • the further suitable as isocyanate-reactive compound (C3b) polysiloxanes contained in the middle! at least two hydroxy groups per moieküi.
  • Particularly suitable polysiloxanes comprise on average 5 to 200 silicon atoms (number average) and are mainly with Ci-Ci 2 alkyl groups, especially methyl groups.
  • isocyanate-reactive compounds (C3b) which have only one isocyanate-reactive hydroxy group include, in particular, aliphatic, cycloaliphatic, araliphatic or aromatic monohydroxycarboxylic acids and -sulfonic acids.
  • the polyurethane-based additives (C3) are prepared by reacting the compounds (C3a) and (C3b), wherein the molar ratio of (C3a) to (C3b) is usually 2: 1 to 1: 1, preferably 1, 2: 1 to 1: 1.2.
  • isocyanate-reactive compounds C3b
  • further compounds with isocyanate-reactive groups for example dithiols, thioalcohols, such as thioethanol, amino alcohols, such as ethanolamine and N-methylethanolamine, or diamines, such as ethylenediamine, and thereby produce polyurethanes which, in addition to the urethane groups, also carry isocyanurate groups, allophanate groups, urea groups, biuret groups, uretdione groups or carbodiimide groups.
  • isocyanate-reactive compounds are aliphatic, cycloaliphatic, araliphatic or aromatic carboxylic acids and sulfonic acids which carry at least two primary and / or secondary amino groups.
  • the carboxy groups of the reaction products (C3) are at least partially in salt form to ensure water solubility.
  • Suitable examples are alkali metal salts, such as sodium and potassium salts, and ammonium salts.
  • the additives (C3) have average molecular weights M w of 500 to 250,000.
  • the surface-active properties of the additives (C3) can be adjusted in a targeted manner.
  • anionic surface-active additives are known and commercially available, for example under the name Borchi ® GEN SN95 (Borchers).
  • Water-soluble anionic surface-active additives based on acidic phosphoric acid, phosphonic acid, sulfuric acid and / or sulfonic acid esters of polyesters (C4) are based in particular on the reaction products of the abovementioned polyethers (C1) with phosphoric acid, phosphorus pentoxide and phosphonic acid or sulfuric acid and Sulfonic acid, In this case, the polyethers are converted into the corresponding phosphoric acid mono- or diesters and phosphonic acid esters or the sulfuric acid monoesters and suifonic acid esters.
  • These acidic esters are preferably in the form of water-soluble salts, especially as alkali metal salts, especially sodium salts, and ammonium salts, but they can also be used in the form of the free acids.
  • Preferred phosphates and phosphonates are derived primarily from alkoxylated, in particular ethoxylated, fatty and oxo alcohols, Aikylphenolen, fatty amines, fatty acids and resin acids, preferred sulfates and sulfonates are based in particular on alko- xyl faced, especially ethoxylated, fatty alcohols, Aikylphenolen and amines, also polyhydric amines, such as hexamethylenediamine.
  • anionic surface active additives are known and commercially available for example under the name Nekal ® (BASF), Tamol ® (BASF), Crodafos ® (Croda), Rhodafac ® (Rhodia), Maphos ® (BASF), Texapon ® (Cognis), Empicol ® (Albright & Wilson), Matextl ® (ICI), Soprophor ® (Rhodia) and Lutensit ® (BASF).
  • Nekal ® BASF
  • Tamol ® BASF
  • Crodafos ® Crodafos ® (Croda)
  • Rhodafac ® Rhodia
  • Maphos ® BASF
  • Texapon ® Cognis
  • Empicol ® Albright & Wilson
  • Matextl ® ICI
  • Soprophor ® Rosit ®
  • Lutensit ® BASF
  • the colorant preparations usually have a content of dispersant (C) of from 1 to 50% by weight, in particular from 1 to 40% by weight.
  • Water forms the liquid carrier material of the colorant preparations.
  • the colorant formulations contain a mixture of water and a water retention agent as the liquid phase.
  • water-retaining agents in particular organic solvents have high boiling points are used (ie usually a boiling point> 100 0 C have), therefore water back reserved, and are miscible in water soluble or water.
  • suitable water retention agents are polyhydric alcohols, preferably unbranched and branched polyhydric alcohols having 2 to 8, in particular 3 to 6, carbon atoms, such as ethylene glycol, 1,2- and 1,3-propylene glycol, glycerol, erythritol, pentaerythritol, Pentites such as arabitol, adonite and xylitol, and hexites such as sorbitol, mannitol and dulctt.
  • Examples of these are di-, tri- and tetraethylene glycol, diethylene glycol monomethyl ethyl, propyl and butyl ethers, triethylene glycol monomethyl, ethyl, propyl and butyl ethers, di-, tri- and tetra-1, 2- and -1, 3-propylene glycol and di-, tri- and tetra-1, 2- and -1, 3-propylene glycol monomethyl, called -ethyi-, -propyl- and -butyiether.
  • the colorant preparations generally contain from 10 to 88.95% by weight, preferably from 10 to 80% by weight, of liquid phase (D). If water is present in a mixture with a water-retaining organic solvent, this solvent generally constitutes from 1 to 80% by weight, preferably from 1 to 60% by weight, of phase (D).
  • colorant preparations as component (E) may contain conventional additives, such as biocides, defoamers, anti-settling agents and rheology modifiers, the proportion of which may generally be up to 5% by weight.
  • the colorant preparations can be obtained in various ways.
  • a pigment dispersion is first prepared, to which the dye is then added as a solid or in particular in dissolved or in liquid, in particular aqueous, phase-dispersed form.
  • the colorant preparations can be added to the mixture of wood fibers or chips and binder used as a basis for the wood-based panels according to the invention in various ways and at different points in the fabrication process.
  • they are advantageously introduced directly into the plate making process via the blowline, separate from or together with the glue.
  • the bleached wood fibers were mixed in a paddle mixer and sprayed with the glue formulation listed in the following table, which contained a gray pigment preparation of the composition likewise indicated there.
  • the glued fibers were then poured into a mat, precompressed cold and pressed at 19O 0 C to a plate.
  • an MDF board was made of unbleached wood fibers with an otherwise unchanged procedure.
  • An MDF plant was fed with wood chips from spruce and the MDF production process was started at a rate of 21 kg / h. Immediately before the refiner a 20 wt .-% aqueous sodium dithionite, corresponding to 5% Nat ⁇ umdithionit atro fibers, was pumped into the process.
  • the resulting bleached wood fibers were continuously sprayed by the blowline with the flax formulation listed in Table 2, which contained a gray pigment preparation of the composition also indicated there.
  • the ismeimten wood fibers were dried in the subsequent continuous dryer to a residual moisture content of about 9 wt .-% and then poured discontinuously into a mat kaft precompressed and at 19O 0 C with a pressing time factor of 15 s / mm to a 16 mm thick plate pressed.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Forests & Forestry (AREA)
  • Paints Or Removers (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

L'invention concerne des panneaux de bois de teinte claire, composés de fibres de bois blanchies et colorées au moyen de préparations de colorants liquides contenant au moins un pigment et au moins un colorant absorbant dans le domaine visible du spectre électromagnétique.
EP06777443A 2005-06-29 2006-06-23 Panneaux de bois de teinte claire Withdrawn EP1899427A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE200510030788 DE102005030788A1 (de) 2005-06-29 2005-06-29 Hellfarbige Holzwerkstoffplatten
DE200610009479 DE102006009479A1 (de) 2006-02-27 2006-02-27 Hellfarbige Holzwerkstoffplatten
PCT/EP2006/063499 WO2007000418A1 (fr) 2005-06-29 2006-06-23 Panneaux de bois de teinte claire

Publications (1)

Publication Number Publication Date
EP1899427A1 true EP1899427A1 (fr) 2008-03-19

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EP06777443A Withdrawn EP1899427A1 (fr) 2005-06-29 2006-06-23 Panneaux de bois de teinte claire

Country Status (4)

Country Link
US (1) US20080210395A1 (fr)
EP (1) EP1899427A1 (fr)
JP (1) JP2009500189A (fr)
WO (1) WO2007000418A1 (fr)

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DE102008059527A1 (de) 2008-11-28 2010-06-02 Basf Se Effekt-MDF

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JP2010523783A (ja) * 2007-04-13 2010-07-15 ビーエーエスエフ ソシエタス・ヨーロピア 有機顔料の調製方法
JP5371955B2 (ja) * 2007-04-24 2013-12-18 ビーエーエスエフ ソシエタス・ヨーロピア 漂白された木材粒子及び淡色ないし白色の木材料の製造方法
DE102007055415C5 (de) * 2007-11-19 2018-11-29 SWISS KRONO Tec AG Verfahren zur Verminderung der Emission von gesättigten und ungesättigten Aldehyden aus Holzwerkstoffen
US20100048787A1 (en) * 2008-02-28 2010-02-25 The Sherwin-Williams Company Wood stain composition and finishing method
PT2193899T (pt) * 2008-12-05 2017-12-18 SWISS KRONO Tec AG Processo para produção de materiais à base de madeira a partir de produtos fragmentados contendo lignocelulose e materiais à base de madeira semelhantes
CN101885561A (zh) * 2010-06-28 2010-11-17 嘉汉林业(广州)有限公司 一种重组装饰材生产废水的处理工艺
JP7044711B2 (ja) * 2016-04-04 2022-03-30 ファイバーリーン テクノロジーズ リミテッド 強度の上昇した天井、床材、および建材製品を提供するための組成物および方法
DE202021004188U1 (de) * 2020-09-29 2023-01-13 ADLER-Werk Lackfabrik Johann Berghofer GmbH & Co. KG Beizmittel

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SE455001B (sv) * 1986-10-03 1988-06-13 Rune Simonson Forfarande vid tillverkning av produkter innehallande trefibrer
US20020148051A1 (en) * 2000-12-04 2002-10-17 Yamaha Corporation Treatment method for wooden material
DE10247239A1 (de) * 2002-10-10 2004-04-22 Basf Ag Verwendung von pigment- und farbstoffenthaltenden Zubereitungen zur dekorativen Einfärbung von Holzwerkstoffen
DE102004050278A1 (de) * 2004-10-14 2006-04-27 Basf Ag Helle bis weiße Holzwerkstoffplatten

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
DE102008059527A1 (de) 2008-11-28 2010-06-02 Basf Se Effekt-MDF
EP2191949A2 (fr) 2008-11-28 2010-06-02 Basf Se Panneau constitué de bois comportant des particles á effet

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US20080210395A1 (en) 2008-09-04
WO2007000418A1 (fr) 2007-01-04
JP2009500189A (ja) 2009-01-08

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