WO2020245309A1 - Pâte pigmentaire exempte de conservateurs - Google Patents

Pâte pigmentaire exempte de conservateurs Download PDF

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Publication number
WO2020245309A1
WO2020245309A1 PCT/EP2020/065544 EP2020065544W WO2020245309A1 WO 2020245309 A1 WO2020245309 A1 WO 2020245309A1 EP 2020065544 W EP2020065544 W EP 2020065544W WO 2020245309 A1 WO2020245309 A1 WO 2020245309A1
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WO
WIPO (PCT)
Prior art keywords
pigment paste
weight
pigment
paste
paste according
Prior art date
Application number
PCT/EP2020/065544
Other languages
German (de)
English (en)
Inventor
Georg Bender
Ingo Hörsting
Original Assignee
Brillux Gmbh & Co. Kg
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
Application filed by Brillux Gmbh & Co. Kg filed Critical Brillux Gmbh & Co. Kg
Priority to EP20732518.4A priority Critical patent/EP3980499A1/fr
Publication of WO2020245309A1 publication Critical patent/WO2020245309A1/fr

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Classifications

    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • 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
    • C09D17/00—Pigment pastes, e.g. for mixing in paints
    • C09D17/001—Pigment pastes, e.g. for mixing in paints in aqueous medium
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/02—Emulsion paints including aerosols
    • C09D5/024—Emulsion paints including aerosols characterised by the additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/17—Amines; Quaternary ammonium compounds
    • C08K5/175—Amines; Quaternary ammonium compounds containing COOH-groups; Esters or salts thereof

Definitions

  • the invention relates to a pigment paste for tinting a coating agent, a method for producing the pigment paste and a coating agent containing coating agent and pigment paste.
  • the invention also relates to a method for producing a coating composition using the pigment paste and the use of amino acids for stabilizing and / or increasing the
  • Pigment pastes for tinting coating compositions such as paints and varnishes, are known in principle. Pigment pastes are usually produced by dispersing pigments and, if necessary, fillers and other suitable materials and, before use, with the material to be tinted
  • Tinted coating agents contain at least one
  • Coating agent and at least one pigment paste Tinted
  • Coating agents are also referred to as coating agents.
  • pigment pastes Compared to adding powdered pigments to a coating agent, pigment pastes have the advantage that they can be distributed easily and homogeneously and are easy to dose. Another advantage is that they do not contain any paint dust, as this easily contaminates the environment when mixed. Finally, pigment pastes can be adjusted to the desired color strength and therefore easily metered into and stirred into a coating agent such as a plastic emulsion paint via the volume.
  • pigment pastes can be used for tinting very different coating agents.
  • An important area here is that Tinting plastic emulsion paint, also known as emulsion paint.
  • Emulsion paints usually contain relatively large amounts of organic chemical components, especially synthetic resin polymers, especially in the form of synthetic resin dispersions.
  • emulsion paints and / or pigment pastes usually require preservatives, in particular biocides such as isothiazolinones.
  • preservatives in particular biocides such as isothiazolinones.
  • biocides such as isothiazolinones.
  • these can cause irritation and skin irritation, especially in allergy sufferers.
  • emulsion paints have been developed which dispense with preservatives.
  • Preservative-containing pigment paste is thus incorporated into the emulsion paint and the tinted emulsion paint is no longer suitable for use by allergy sufferers.
  • preservative-free emulsion paint This is primarily due to the fact that pigment pastes vary significantly more in their compositions and concentrations than emulsion paints. The amount of pigment and water can vary within wider ranges than for
  • Emulsion paints are common and consequently pigment pastes can also have a greater variance in their viscosity.
  • Another particular challenge faced by pigment pastes in comparison to emulsion paints is the high flexibility that pigment pastes have to provide.
  • the pigment pastes should be able to be mixed flexibly with very different colors, lacquers or plasters. For this, the pigment paste must have good miscibility and compatibility with
  • the coating compositions sometimes have significant differences in their composition and their pH. Therefore, such a level of miscibility and compatibility of the pigment pastes is difficult to achieve.
  • pigment pastes are significantly higher than the storage requirements for emulsion paints.
  • Pigment pastes usually have to be stored for significantly longer periods of time, as they are often used irregularly for tinting colors and are not used up relatively quickly like finished colors. There they are exposed to pests from the air in combination with the high humidity in the mixing tank. In addition, will
  • Oxygen from the air is added, which is also well distributed in the paste due to the permanent mixing.
  • the added oxygen from the air can bring in pests and promote their growth.
  • In-can preservatives also contain fungicides to prevent infestation in the mixing container. Because of the significantly longer storage times, there is also the problem with pigment pastes that the pigments are exposed to the conditions in the paste for significantly longer periods of time than in an emulsion paint.
  • the preservative-free emulsion paints described in the publications EP 1 297 079 B1, DE 1 031 910, DE 10 2014 013 455 A1, DE 10 2016 002 221 A1 and EP 3 360 010 A1 require a strongly alkaline environment to prevent infestation by pests. In a concentrated paste that is to be used over long periods of time, there is the risk that the pigment paste is not permanently stable in the form and continuously compatible in all the required qualities.
  • the present invention is thus an object
  • preservative-free pigment paste which can be used for periods of at least six months without any loss of quality and without pest infestation for tinting a coating agent, in particular in automatic paint mixers.
  • the present invention is further an object
  • a further object of the invention is to provide a preservative-free pigment paste which can be used in mixing containers of automatic mixing machines
  • the pigment paste according to the invention contains, based in each case on the total weight of the pigment paste,
  • the pH of the pigment paste being from 10 to 14.
  • Pigment paste according to the invention does not require any preservatives for this. Even in the highly concentrated, moist, powdery portion of the paste on the upper inside of the container in which the paste is present in the automatic mixer, no pest infestation occurs with the paste according to the invention.
  • Pigment paste can also be combined with a wide variety of coating agents and simply mixed.
  • the pigment paste according to the invention is outstandingly suitable for tinting preservative-free emulsion paints.
  • Conservative-free emulsion paints and other preservative-free coating agents can consequently be tinted with the pigment paste according to the invention.
  • pigment pastes either do not have a sufficiently long-lasting preservative effect or they do not have broad concentration ranges of the others
  • Coating agent compatible Such an interaction of wetting agent and amino acid was previously not to be expected based on the prior art.
  • Amino acids according to the invention are compounds that contain at least one
  • amino group and at least one carboxyl group.
  • the amino group can in particular be an —NH2, —NHR or —NR2 group, where each R, in each case independently of one another, in particular a substituted or
  • alkyl is unsubstituted alkyl, cycloalkyl, alkenyl, aryl, acyl, alkynyl, alkylaiyl or glycidyl radical.
  • Amino acids for the purposes of the invention also include
  • Amino acid salts Amino acids within the meaning of the invention can in particular be a-, ⁇ -, g-, d- or e-amino acids, with a-amino acids being particularly preferred.
  • Particularly inexpensive pigment pastes can be provided if the
  • Amino acid is selected from the group consisting of glycine, alanine, valine,
  • Leucine isoleucine, methionine, proline, phenylalanine, tryptophan, serine, threonine, asparagine, glutamine, tyrosine, cysteine, selenocysteine, lysine, arginine, histidine,
  • Aspartic acid Aspartic acid, glutamic acid and mixtures thereof.
  • the proteinogenic amino acids Aspartic acid, glutamic acid and mixtures thereof.
  • Amino acids are particularly inexpensive to obtain and are ideal for stabilizing the pH value of the pigment paste.
  • a particular challenge in providing a preservative-free pigment paste is that the compounds added for stabilization can severely impair the flow behavior of the paste. This can have the consequence that the paste is not suitable for the automatic mixer and / or cannot be mixed well with the coating agent. It has now surprisingly been has shown that the pigment paste according to the invention has excellent flow properties when the amino acid is alanine and / or glycine. A pigment paste with glycine and / or alanine as an amino acid has practically no change
  • the amino acid is contained in the pigment paste according to the invention in an amount of 0.1 to 10% by weight, based on the total weight of the pigment paste.
  • the pigment paste according to the invention preferably contains 0.1 to 7% by weight, more preferably 0.2 to 3% by weight, more preferably 0.3 to 2% by weight, even more preferably 0.3 to 1.5% by weight and particularly preferred 0.3 to 1.2% by weight of amino acid, based in each case on the total weight of the pigment paste.
  • Pigment pastes with such a proportion of amino acid show an excellent storage stability in which no loss of quality can be observed even over a period of more than 6 months. No infestation by fungi or other biological pests can be observed over the same period.
  • the pigment paste contains 1 to 75% by weight of pigment.
  • Various substances can be used as pigments here.
  • the pigment is preferably selected from the group consisting of titanium dioxide, iron oxide yellow, arylide (monoazo),
  • Bismuth vanadate (di) arylides, azo condensation pigments, pyranthones, isoindolines, anthraquinones, derivatives of dioxazines, perinones, naphthol-AS derivatives, peiylenes, quinacridones, indanthrenes, phthalocyanines, rutile-tin-zinc, quinacridones, pyrrolo-pyrrole, diketo-, pyrrole Iron oxide red, phthalocyanine blue, dioxazine, cobalt blue,
  • the proportion of pigment in the paste varies over a wide range. This is related on the one hand to the desired color of the paste and on the other hand to the color strength of the pigment.
  • Preferred ranges of amounts of pigment in the paste are 5 to 70% by weight, preferably 10 to 65% by weight, more preferably 20 to 55% by weight and particularly preferably 30 to 50% by weight pigment.
  • Inorganic pigments are usually used in larger amounts than organic pigments. According to a preferred embodiment, contains
  • Pigment paste from 20 to 75% by weight of an inorganic pigment, preferably from 40 to 70% by weight of an inorganic pigment. According to a further preferred embodiment, the pigment paste contains from 1 to 50% by weight, preferably from 1 to 20% by weight, of an organic pigment. According to another preferred
  • the pigment paste contains from 20 to 75% by weight, preferably from 40 to 70% by weight of an inorganic pigment and from 1 to 20% by weight, preferably from 1 to 10% by weight of an organic pigment.
  • inorganic pigments preference is given to using inorganic pigments.
  • inorganic pigments are oxides such as titanium dioxide, iron oxides, e.g. P.Y. 42, P.R. 101, P.Bk. 11, chrome oxide green, e.g. P.G. 17, chromium oxides, e.g. P.Br. 29, mixed phase pigments e.g. Cobalt Oxides Blue P.B. 28 and Green P.G. 50, bismuth vanadate P.Y. 184, rutile-tin-zinc P.O. 216, rutile-tin-zinc-titanium P.Y. 213, silicates, e.g.
  • Ultramarine blue P.B. 29 and carbon e.g. Soot P.Bk. 7th
  • organic pigments preference is given to using organic pigments.
  • organic pigments are azo pigments, e.g. Alylidgelb (Monoazo) PY 74, polycyclic pigments, e.g. Quinacridone PR 122, Perinone PO 43, Pyrazolo-Chinazolone PO 67, Diketo-Pyrrolo-Pyrrole (DPP) PR 254, Dioxazine PV 23 and metal complex pigments, e.g. copper phthalocyanines blue PB 15: 3 and green PG 7.
  • the names of the inorganic and organic pigments used for the examples correspond to the Generic Names of the Color Index of the British Society of Dyers and Colourists.
  • mixtures of inorganic and organic pigments are used.
  • colored pigment pastes can be produced which essentially cover the entire color spectrum.
  • the pigment paste according to the invention can contain filler.
  • the pigment paste can in particular contain 0.01 to 60% by weight or 5 to 50% by weight or 10 to 40% by weight or 15 to 30% by weight, based in each case on the total weight of the pigment paste, of filler.
  • the filler can be selected from the group consisting of carbonates, sulfates, oxides, and mixtures thereof.
  • the filler can be selected from the group consisting of dolomite, barium sulfate, feldspar, quartz, calcium carbonate, mica, kaolin, calcined kaolin, talc, clay, silica, diatomaceous earth and
  • the filler is calcium carbonate. Such fillers give pigment pastes with good
  • Calcium carbonate can be used in various forms, for example in the form of chalk or calcite.
  • the pigment paste contains at least one filler. According to another preferred embodiment, the pigment paste does not contain any filler.
  • the use of fillers in the paste depends on the overall composition of the paste. In principle, the price of the paste can be reduced by using fillers. However, the use of filler can also lead to difficulties in the compatibility of the components in the paste come, in particular the filler can settle in the mixer. Additional spores can also be introduced into the system via fillers. In addition, fillers have negative effects on glossy systems and generally reduce the weathering stability of the coating agent.
  • Coating agents can be mixed if the filler particles are small.
  • the filler particles of the pigment paste according to the invention advantageously have a size of less than 100 ⁇ m, in particular less than 80 ⁇ m, preferably from 0.1 to 50 ⁇ m, more preferably from 1 to 30 ⁇ m.
  • Methods for determining the particle size are known to the person skilled in the art. For example, the particle size can be determined using a grindometer according to DIN EN ISO 1524, in particular according to DIN EN ISO
  • the particle size of the fillers relates in particular to the maximum agglomerate size in the pigment paste.
  • the particle size in particular the particle size distribution, can also be determined by means of transmission electron microscopy.
  • the particle size is preferably determined using a grindometer according to DIN EN ISO 1524: 2013-06.
  • the pigment paste also contains at least one wetting agent.
  • the wetting agent acts as an anti-flocculant, which prevents the suspended particles from flocculating out of the paste.
  • the wetting agent improves the distribution of the pigment paste in the coating agent.
  • pigment pastes with the wetting agent and amino acid contents according to the invention have good compatibility of the constituents of the
  • Pigment paste itself as well as the pigment paste with the one to be tinted
  • the proportion of the wetting agent in the pigment paste can vary within wide ranges and is based in principle on the desired viscosity of the pigment paste.
  • the amount of wetting agent suitable in each case depends on the type of wetting agent used, on the amount and type of pigment used and on any further constituents of the pigment paste that may be present.
  • a wetting agent content of 0.5 to 30% by weight, preferably 0.5 to 25% by weight, more preferably from 1 to 20% by weight, more preferably from 1 to 15% by weight, more preferably from 2 to 12% by weight, particularly preferably from 4 to 10% by weight, in each case based on the total weight of the
  • Pigment paste excellent results are achieved.
  • a higher proportion of wetting agent in the pigment paste than 30% by weight can lead to an undesirable glossy surface of the coating agent tinted with pigment paste. If you do without or use too little wetting agent, it can
  • wetting agents are diethyl maleate, tall oil, polyethylene polyamine,
  • alkali polyphosphonate for example sodium polyphosphate
  • alkali phosphonate for example sodium phosphonate
  • Acylate copolymers polyether polysiloxane, polyoxyethylene (2) stearyl alcohol, polyesters, fatty acid modified polyesters and mixtures thereof.
  • the pH of the pigment paste is from 10 to 14, preferably from 10 to 12, more preferably from 10.4 to 11.6.
  • the pH of the pigment paste is particularly preferably more than 10.4 and less than 11.5. It has been found that pigment pastes with the specified pH values show no or only slight discoloration even after storage for several months, even if they are essentially free of preservatives. “Substantially free of preservatives” means that the pigment paste contains no more than traces of preservatives, in particular in an amount of less than 2 ppm. With the pH value described above, the optimal balance is struck between the prevention of infestation by pests and the stability of the
  • Pigment pastes according to the invention with such pH values have the additional advantage that they can also be used without special precautions with regard to industrial safety.
  • the pH value can be adjusted, for example, by adding alkaline substances, also called alkaline plates.
  • alkaline substances also called alkaline plates.
  • the paste according to the invention preferably contains 0.01 to 7% by weight of alkali plates. Examples of alkaline plates are
  • Alkali metal hydroxides such as lithium, sodium and / or potassium hydroxide
  • Alkaline earth metal hydroxides such as magnesium, calcium and / or barium hydroxide, ammonium hydroxide, xonotlite and / or ettringite (Ca 6 [Al (OH) 6 ] 2 (S04 x 26 H2O)).
  • the xonotlite preferably has a monoclinic crystal system (xonotlite-monoclinic). It has been shown that xonotlitol and / or ettringitol can be used in a particularly advantageous manner in combination with the amino acid contained in the pigment paste according to the invention. In particular, wise
  • Pigment pastes that contain xonotlite and / or ettringite as an alkali plate in addition to the amino acid have increased pH stability.
  • the invention contains
  • Pigment paste in addition to at least one amino acid at least one alkali plate in an amount from 0.01 to 12% by weight, preferably from 0.01 to 10% by weight, preferably from 0.01 to 7% by weight, more preferably from 0.05 to 5% by weight, more preferably from 0.1 to 2.5% by weight, particularly preferably from 0.5 to 2.0% by weight or most preferably from 0.7 to 1.2% by weight, based on the total weight the pigment paste.
  • the pigment paste according to the invention can be 0.01 to 5% by weight, preferably from 0.1 to 2.5% by weight, preferably from 0.5 to 2.0% by weight or particularly preferably from 0.7 to 1.2% by weight .%, Potassium hydroxide, xonotlite and / or ettringite, based on the
  • the pigment paste according to the invention contains from 0.5 to 2.0% by weight, preferably from 0.7 to 1.2% by weight, based on the
  • the pH remains the
  • pigment paste according to the invention over a period of at least 4 weeks, preferably at least 8 weeks, more preferably at least 12 weeks, even more preferably at least 16 weeks, even more preferably at least 20 weeks, essentially constant.
  • “Essentially constant” means that the The measured pH value does not change within the measurement tolerance range customary for pH measurements.
  • the pigment paste according to the invention is further distinguished by the fact that it has a viscosity of 0.1 to 12, preferably 0.5 to 8 Pa-s, particularly preferably 0.8 to 5 Pa-s, measured 23 ° C and at a shear rate of 3 s _1 in the rotary viscometer with cylindrical measuring geometry.
  • the pigment paste preferably has a shear rate of 50 s -1 and a temperature of 23 ° C.
  • Rotational viscometer with a cylindrical measuring geometry has a viscosity of 0.1 to 5 Pa-s, preferably 0.2 to 3 Pa-s, particularly preferably 0.35 to 1.5 Pa-s.
  • a viscosity of 0.1 to 8 Pa-s at 3 s -1 is essential for the processability of
  • Pigment pastes are ideal because they can be easily mixed with common coating agents.
  • the pigment paste according to the invention can be metered in, for example, without problems in commercially available automatic mixers.
  • the viscosity of the pigment paste according to the invention is particularly high enough to prevent the solids it contains, such as pigments and / or fillers, from settling on the bottom of the storage container in the mixer. At the same time, however, the viscosity is low enough that the pigment paste can be metered into a coating agent with sufficient accuracy and reproducibility.
  • the pigment paste according to the invention can also be used as further additives
  • Contain dispersants Contain dispersants, rheological additives, defoamers and / or water repellants.
  • rheology additives are methyl hydroxyethyl cellulose, sheet silicate such as smectite and hectorite, xanthan gum, silicon dioxide, polyurethane resin, octan-1-ol (ethoxylated, 4-EO), alcohol alkoxylates, ethylene oxide-propylene oxide copolymers, maleic anhydride-diisobutylene copolymers and polyacrylic acid and polyacrylic acid, their salts, methyl celluloses, carboxymethyl celluloses,
  • Hydroxymethyl celluloses polyurethanes, alkali metal phosphates, acrylates and salts of modified phosphoric acids, and mixtures thereof.
  • defoamers are polyurethane resins, polyglycols, triglycerides,
  • water repellants are, in particular, oligomeric and polymeric siloxanes and silicone resins.
  • the pigment paste according to the invention is essentially free from preservatives, in particular from isothiazolines.
  • Pigment paste contains no more than traces of preservatives, in particular in an amount of less than 2 ppm.
  • isothiazolines are examples of isothiazolines.
  • the pigment paste is preferably free from ([([(2-dihydro-5-methyl-3 (2H) -oxazolyl) -1-methylethoxy] methoxy) methoxy] methanol.
  • Pigment pastes usually do not contain a binder.
  • the pigment paste according to the invention is essentially free of binder.
  • the paste has less than 1% by weight, in particular less than 0.5% by weight, less than 0.1% by weight, contains less than 0.05% by weight or less than 0.01% by weight, based on the total weight of the pigment paste, of binder.
  • Such a paste can be particularly flexible with different
  • Coating agents are combined.
  • the pigment paste consists essentially of 1 to 75% by weight pigment, 0.1 to 10% by weight amino acid, 0.5 to 30% by weight wetting agent and 15 to 75% by weight, each based on the total weight of the Pigment paste.
  • the pigment paste consists essentially of the components mentioned, this means that the pigment paste contains at least 90% by weight, in particular at least 93% by weight, preferably at least 95% by weight, preferably at least 97% by weight % By weight, more preferably at least 99% by weight, based in each case on the total weight of the pigment paste, of the above
  • up to 10% by weight (or up to 7, 5, 3 or 1% by weight) of the pigment paste can consist of other components, in particular fillers, alkali plates, dispersants,
  • Rheology additives defoamers and / or water repellants are possible.
  • Such a pigment paste has good storage stability and good rheological properties.
  • the pigment paste consists essentially of 10 to 65 wt.% Pigment, 10 to 40 wt.%
  • Glycine 0.2 to 4 wt.% Glycine and / or alanine, especially glycine, 2 to
  • the pigment paste consists essentially of the components mentioned, this means that the pigment paste is at least 95% by weight, in particular at least 97% by weight, preferably at least 98% by weight or particularly preferably at least 99% by weight, based in each case on the total weight of the pigment paste, of the above
  • pigment pastes can consist of other constituents, dispersants, rheology additives, defoamers and / or water repellants being particularly suitable.
  • a pigment paste has particularly good storage stability, excellent rheological properties, very good miscibility with coating agents and good optical properties.
  • the pigment paste consists essentially of 10 to 65% by weight pigment, 0.2 to 4% by weight glycine and / or alanine, in particular glycine, 2 to 12% by weight wetting agent, 0.1 up to 2.5% by weight of alkali metal, especially potassium hydroxide, and 15 to 75% by weight of water, based in each case on the total weight of the pigment paste.
  • the pigment paste consists essentially of the components mentioned, this means that the pigment paste is at least 90% by weight, in particular at least 95% by weight, preferably at least 97% by weight,
  • pigment paste can consist of other components, with fillers, dispersants, rheological additives,
  • Pigment paste has particularly good storage stability, excellent rheological properties, very good miscibility with coating agents and good optical properties.
  • the pigment paste consists of 1 to 75% by weight of pigment, 0.1 to 10% by weight of amino acid, 0.5 to 30% by weight of wetting agent and 15 to 75% by weight, based in each case on the total weight of the pigment paste .
  • the invention further provides a method for producing the pigment paste according to the invention, comprising the steps
  • the method preferably comprises, as a further step c., Adjusting the pH value to a value of 10 to 14.
  • the pH value is preferably adjusted to this value with an alkali plate.
  • the pigment paste according to the invention is outstandingly suitable for tinting coating compositions. It is particularly advantageous here that the pigment paste has an extremely low influence on the gloss of the color mixing system. Mixing a coating agent with a pigment paste makes this
  • Coating agent tinted This gives a tinted coating agent.
  • Tinted coating agents are also referred to as coating agents.
  • Coating agents contain at least one pigment paste according to the invention and one or more coating agents.
  • the invention thus also provides a process for producing a coating composition in which at least one pigment paste according to the invention is mixed with one or more coating compositions. Mixing is preferably carried out by automatic mixers.
  • a maximum of 15% by volume of pigment paste is preferably mixed into the coating agent. In this way, an easily spreadable and durable coating material is obtained which has a long shelf life even if the coating material is free from preservatives.
  • coating agents are suitable as coating agents which are or are mixed with the at least one pigment paste according to the invention.
  • silicate paints emulsion silicate paints, lacquers, plasters and plastic emulsion paints are used as coating agents,
  • Plastic emulsion paints can be used. Preferably that is
  • Another object of the invention is a coating agent comprising at least one pigment paste according to the invention and at least one
  • the coating agent is preferably essentially free from preservatives.
  • the invention also relates to the use of an amino acid to stabilize and / or increase the storage stability of pigment pastes.
  • a pigment paste with the following formulation shown in Table 1 was prepared by mixing the constituents given in Table 1, the doses in each case in% by weight.
  • Formulation A showed good storage stability of more than 6 months without discoloration and was easy to process.
  • the formulation showed good miscibility with coating agents, in particular with

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

L'invention concerne une pâte pigmentaire contenant, rapporté au poids total de ladite pâte pigmentaire, 1 à 75 % en poids de pigment, 0,1 à 10 % en poids d'acide aminé, 0,5 à 30 % en poids d'agent mouillant et 15 à 75 % en poids d'eau, le pH de cette pâte pigmentaire étant compris entre 10 et 14. L'invention concerne en outre un procédé de fabrication d'une telle pâte pigmentaire, un agent de recouvrement contenant au moins un agent de revêtement et au moins une telle pâte pigmentaire et un procédé de fabrication d'un agent de recouvrement.
PCT/EP2020/065544 2019-06-06 2020-06-04 Pâte pigmentaire exempte de conservateurs WO2020245309A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20732518.4A EP3980499A1 (fr) 2019-06-06 2020-06-04 Pâte pigmentaire exempte de conservateurs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019003940.8 2019-06-06
DE102019003940.8A DE102019003940A1 (de) 2019-06-06 2019-06-06 Konservierungsmittelfreie Pigmentpaste

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Publication Number Publication Date
WO2020245309A1 true WO2020245309A1 (fr) 2020-12-10

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PCT/EP2020/065544 WO2020245309A1 (fr) 2019-06-06 2020-06-04 Pâte pigmentaire exempte de conservateurs

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EP (1) EP3980499A1 (fr)
DE (1) DE102019003940A1 (fr)
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EP1297079B1 (fr) 2000-06-21 2005-12-14 DEUTSCHE AMPHIBOLIN-WERKE VON ROBERT MURJAHN GmbH + Co. KG Peinture de dispersion exempte de conservateur
WO2005111158A1 (fr) * 2004-05-12 2005-11-24 Celanese Emulsions Gmbh Substances de revetement exemptes de conservateur, procede de preparation desdites substances et leur utilisation
WO2009130238A1 (fr) * 2008-04-25 2009-10-29 Basf Se Procédé destiné à améliorer la stabilité au stockage de dispersions aqueuses contenant des particules composites
DE102014013455A1 (de) 2014-09-17 2016-03-31 Diessner GmbH & Co KG Lack- und Farbenfabrik Topf-Konservierungsmittelfreie Dispersionsfarbe auf Siliconatbasis
EP3360010A1 (fr) 2015-10-05 2018-08-15 Qubitekk, Inc. Source accordable de bi-photons
DE102016002221A1 (de) 2016-02-26 2017-08-31 Brillux Gmbh & Co. Kg Dispersionsfarbe
EP3460010A1 (fr) * 2017-09-26 2019-03-27 STO SE & Co. KGaA Composition de revêtement stable au stockage

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Publication number Priority date Publication date Assignee Title
WO2021078932A1 (fr) * 2019-10-23 2021-04-29 Brillux Gmbh & Co. Kg Peinture de dispersion exempte de conservateur

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