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EP1678265A1 - Pates pigmentaires contenant des pigments a effet, procede pour les produire et leur utilisation - Google Patents

Pates pigmentaires contenant des pigments a effet, procede pour les produire et leur utilisation

Info

Publication number
EP1678265A1
EP1678265A1 EP04791357A EP04791357A EP1678265A1 EP 1678265 A1 EP1678265 A1 EP 1678265A1 EP 04791357 A EP04791357 A EP 04791357A EP 04791357 A EP04791357 A EP 04791357A EP 1678265 A1 EP1678265 A1 EP 1678265A1
Authority
EP
European Patent Office
Prior art keywords
pigments
weight
effect
pigment
pigment pastes
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Withdrawn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
EP04791357A
Other languages
German (de)
English (en)
Inventor
Götz-Ekkehard SAPPER
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 Coatings GmbH
Original Assignee
BASF Coatings GmbH
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 BASF Coatings GmbH filed Critical BASF Coatings GmbH
Publication of EP1678265A1 publication Critical patent/EP1678265A1/fr
Withdrawn legal-status Critical Current

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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
    • C09D17/00—Pigment pastes, e.g. for mixing in paints
    • 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
    • C09D5/36—Pearl essence, e.g. coatings containing platelet-like pigments for pearl lustre

Definitions

  • the present invention relates to new pigment pastes containing effect pigments. Furthermore, the present invention relates to a new method for producing pigment pastes containing effect pigments. In addition, the present invention relates to the use of the new pigment pastes containing effect pigments and the pigment pastes containing effect pigments produced with the aid of the new process, in particular for the production of water-based or non-water-based, in particular aqueous, coating materials.
  • aqueous coating materials such as water-based paints
  • non-aqueous coating materials has been known for a long time.
  • effect pigments cause problems when incorporated into aqueous coating materials, especially waterborne basecoats.
  • a metallic waterborne basecoat it is necessary to mix the effect pigments in the form of a paste or suspension in a liquid organic phase with the other constituents of the waterborne basecoat.
  • the effect pigments are usually pasted or rubbed in organic solvents with or without rubbing resins.
  • An organic solvent or solvent mixture that wets the effect pigment well is usually used as the solvent.
  • polyesters are usually used as rubbing resins (see, for example, the company lettering from Akzo Nobel Resins "Starting Point Formulation based on Setalux® 6802 AQ-24" from February 23, 2001). The manner in which these inclinations have a significant influence on the quality the effects of the coatings produced with the aid of the coating materials in question.
  • non-water pigment pastes containing effect pigments have the disadvantage that they have only a very limited shelf life of a maximum of a few days. Then the effect pigments settle and specks and coagulates form. Aqueous coating materials, in particular waterborne basecoats, and non-aqueous coating materials, using These pigment pastes are produced, only deliver coatings of poor optical quality.
  • An aqueous primary dispersion of a (meth) acrylate copolymer is known from the company publication of Akzo Nobel Resins "Setalux ® 6802 AQ-24" from January 2000.
  • the primary dispersion has a solids content of 22 to 26% by weight and an acid number (as such) of 3.5 to 5.2 mg KOH / g.
  • the particle size of the (meth) acrylate copolymer particles is 180 to 255 nm. After their neutralization, the primary dispersion is pseudoplastic. It creates a good orientation of aluminum effect pigments in waterborne basecoats. It is very stable, insoluble in organic solvents and easy to atomize.
  • this primary dispersion and the (meth) acrylate copolymer contained therein are used as binders in metallic waterborne basecoats.
  • the metallic waterborne basecoats are prepared by adding a large amount of the solution of a melamine-formaldehyde resin, a common and well-known pigment paste consisting of an aluminum effect pigment, butylglycol, a polyester and dimethylethanolamine, the solution of the polyester in butylglycol and dimethylethanolamine Primary dispersion and water mixed. The use of the primary dispersion for the production of pigment pastes containing aluminum effect pigment is therefore not described.
  • Pigment pastes containing effect pigments can be stored for a long time (for example up to 3 months) without settling and without formation of specks and coagulates.
  • the new pigment pastes containing effect pigments are said to be able to be manufactured at a production site which offers optimal conditions and to be able to be transported to the customers, in particular to the automobile manufacturers. In this way, the effort for warehousing should be significantly reduced. In addition, the new pigment pastes containing effect pigments should be able to be sheared without problems in the ring lines of the coating systems without being damaged.
  • the new pigment pastes containing effect pigments are intended to enable the production of storable, transportable, color-stable, effect-stable and easy-to-apply, aqueous coating materials, in particular water-based paints, and non-aqueous coating materials which provide excellent color and / or effect coatings, in particular multi-layer coatings of automotive quality (cf. also deliver European patent EP 0 352 298 B1, page 15, line 42, to page 17, line 40).
  • the new pigment pastes containing effect pigments should be compatible with the widest possible range of pigments without having to make major changes in their composition.
  • the new pigment pastes containing effect pigments have been found and can be prepared from at least the following constituents:
  • the percentages by weight are based in each case on the total amount of pigment paste.
  • pigment pastes according to the invention are referred to as “pigment pastes according to the invention”.
  • the new process for producing pigment pastes containing effect pigments is referred to below as the “process according to the invention”.
  • the new use of the pigment pastes according to the invention for the production of aqueous and non-aqueous coating materials was found, which is referred to below as “use according to the invention”.
  • the pigment pastes according to the invention were simple to produce without damaging the pigments. Also, only comparatively small amounts of additives had to be added. Nevertheless, the pigment pastes according to the invention were surprisingly stable, transportable and storable. It was particularly surprising that the pigment pastes according to the invention could be stored for several months without settling and without formation of specks and coagulates.
  • the pigment pastes according to the invention could therefore be produced at a production site which offered optimal conditions and transported to the customers, in particular to the automobile manufacturers. In this way, the cost of warehousing at the customer could be significantly reduced. In addition, the pigment pastes according to the invention could be sheared without problems in the ring lines of the coating systems without being damaged.
  • the pigment pastes according to the invention delivered storable, transportable, color-stable, effect-stable and easy to apply, aqueous coating materials, in particular water-based paints, and non-aqueous coating materials.
  • the waterborne basecoats made it possible to produce excellent multi-layer paints of automotive quality that provide effects or color and effects. According to the European patent EP 0 352 298 B1, page 15, line 42, to page 17, line 14, this means that the relevant multi-layer coatings
  • the pigment pastes according to the invention contain at least one effect pigment (A) in an amount of 10 to 65% by weight, preferably 15 to 60% by weight and in particular 20 to 55% by weight, based on the pigment paste.
  • This high concentration is the main characteristic of a pigment paste.
  • the effect pigments (A) are preferably selected from the group consisting of organic and inorganic, optically effect-imparting, color and optically effect-imparting, magnetically shielding, electrically conductive, corrosion-inhibiting, fluorescent and phosphorescent pigments, preferably from the group consisting of organic and inorganic, optically effecting and coloring and optically effecting pigments, and in particular from the group consisting of metallic effect pigments, of metals and non-metals composite effect pigments and non-metallic effect pigments, selected.
  • the metal effect pigments (A) are aluminum effect pigments, iron effect pigments or copper effect pigments, such as commercially available aluminum bronzes, according to DE 36 36 183 A1 chromated aluminum bronzes, commercially available stainless steel bronzes and commercially available copper bronzes.
  • the effect pigments (A) composed of metals and non-metals are platelet-shaped aluminum pigments coated with iron oxide, as are described, for example, in European patent application EP 0 562 329 A 2; Glass plates coated with metals, especially aluminum; or interference pigments which contain a reflector layer made of metal, in particular aluminum, and which have a strong color flop, as described, for example, in US Pat. Nos. 4,434,010 A1, 4,704,356 A1, 4,779,898 A1, 4,838,648 A1, 4,930,866 A1 , US 5,059,245 A1, US 5,135,812 A1, US 5,171,363 A1 or US 5,214,530 A1.
  • non-metallic effect pigments (A) are pearlescent pigments, in particular mica pigments, as are described, for example, in Merck Contacts, 1992, Issue 2, pages 3 to 60; platelet-shaped graphite pigments coated with metal oxides, as are described, for example, in Japanese Patent Application JP 5-311098 A; Interference pigments that do not contain a reflector layer made of metal and have a strong color flop, as described, for example, in US Pat. Nos.
  • Suitable electrically conductive pigments are titanium dioxide / tin oxide pigments and powdered metal pigments.
  • magnétiqueally shielding pigments examples include pigments based on iron oxides or chromium dioxide.
  • Suitable corrosion-inhibiting pigments are zinc powder, lead silicates, zinc phosphates or zinc borates.
  • the pigment pastes according to the invention therefore ensure, owing to the large number of suitable effect pigments (A), a universal range of use and permit the production of coating materials according to the invention, with which an extraordinarily large variety of coatings with the most varied of physical effects can be realized.
  • the pigment pastes according to the invention can also contain at least one pigment which differs from the metal pigments (A) and is selected from the group consisting of organic and inorganic, coloring and filling pigments, pigments which have at least two of these properties, and nanoparticles, provided that such an additional pigment does not adversely affect the application properties of the pigment pastes according to the invention.
  • Suitable inorganic color pigments are white pigments such as zinc white, zinc sulfide or lithopone; Black pigments such as carbon black, iron-manganese black or spinel black; Colored pigments such as chromium oxide, chromium oxide hydrate green, cobalt green or ultramarine green, cobalt blue, ultramarine blue or manganese blue, ultramarine violet or cobalt and manganese violet, iron oxide red, cadmium sulfoselenide, molybdate red or ultramarine red; Iron oxide brown, mixed brown, spinel and corundum phases or chrome orange; or iron oxide yellow, nickel titanium yellow, chrome titanium yellow, cadmium sulfide, cadmium zinc sulfide, chrome yellow or bismuth vanadate.
  • white pigments such as zinc white, zinc sulfide or lithopone
  • Black pigments such as carbon black, iron-manganese black or spinel black
  • Colored pigments such as chro
  • suitable organic color pigments are monoazo pigments, disazo pigments, anthraquinone pigments, benzimidazole pigments, quinacridone pigments, quinophthalone pigments, diketopyrrolopyrrole pigments, dioxazine pigments, indanthrone pigments, isoindoline pigments, isoindolinone pigments, azomethine pigments, thioindigo pigments, metal complex pigments, perinone pigments, perylene pigments, phthalocyanine pigments or aniline black.
  • filling pigments or fillers are chalk, calcium sulfate, barium sulfate, silicates such as talc or kaolin, silicas, oxides such as aluminum hydroxide or magnesium hydroxide or organic fillers such as textile fibers, cellulose fibers, polyethylene fibers or polymer powder;
  • silicates such as talc or kaolin
  • silicas oxides such as aluminum hydroxide or magnesium hydroxide
  • organic fillers such as textile fibers, cellulose fibers, polyethylene fibers or polymer powder
  • the nanoparticles are preferably selected from the group consisting of main and subgroup metals and their compounds.
  • the main and subgroup metals are preferably selected from metals of the third to fifth main group, the third to sixth and the first and second subgroup of the Periodic Table of the Elements and the lanthanides.
  • the compounds of the metals are preferably the oxides, oxide hydrates, sulfates or phosphates.
  • the nanoparticles preferably have a primary particle size ⁇ 50 nm, preferably 5 to 50 nm, in particular 10 to 30 nm.
  • the pigment pastes according to the invention can be produced using at least one, in particular one, aqueous, mono-modal primary dispersion (B) which is pseudoplastic after neutralization, in an amount of 1 to 20% by weight, preferably 2 to 18% by weight, based on the pigment dispersion according to the invention .-% and in particular 5 to 15 wt .-%.
  • B aqueous, mono-modal primary dispersion
  • the primary dispersion (B) has a solids content of 10 to 40% by weight, preferably 10 to 35% by weight and in particular 15 to 30% by weight.
  • the primary dispersion (B) contains, as the disperse phase, particles having an average particle size of 10 to 500 nm, preferably 50 to 400 nm and in particular 100 to 300 nm.
  • the particle sizes are preferably in the range from 50 to 450 nm, preferably 80 to 400 nm and in particular 100 to 300 nm.
  • the particles have a hydrophobic core and a hydrophilic shell.
  • the property hydrophobic is to be understood as the constitutional property of a molecule or a functional group to behave exophilically towards water, ie it shows the tendency not to penetrate water or to leave the aqueous phase.
  • hydrophilic means the constitutional property of a molecule or functional group to behave exophilically with respect to a non-polar, hydrophobic phase, that is, they have a tendency to penetrate into water • or to leave the non-polar phase (see also Römpp Lexikon Lacke und Druckmaschine , Georg Thieme Verlag, Stuttgart, New York, 1998, "Hydrophilicity", “Hydrophobia", pages 294 and 295).
  • the particles essentially form, preferably more than 80% by weight, in particular more than 90% by weight, in each case based on the solid, or completely the solid of the dispersion according to the invention.
  • the particles are composed of at least one, in particular one, (meth) acrylate copolymer. This means that the particles essentially, preferably more than 80% by weight, in particular more than 90% by weight, in each case based on the particles, or consist entirely of the (meth) acrylate copolymer (s).
  • the (meth) acrylate copolymer has a glass transition temperature of 30 to 100 ° C, preferably 35 to 90 ° C and in particular 40 to 80 ° C (measured using the Differential Scanning Calorimetry (DSC)) and an acid number of 10 to 50 mg KOH / g, and preferably 10 to 40 mg KOH / g.
  • DSC Differential Scanning Calorimetry
  • the (meth) acrylate copolymer preferably contains reactive functional groups, as are described, for example, in the overview in German patent application DE 199 30 067 A1, page 7, line 25, to page 8, line 59. In particular, it contains hydroxyl groups.
  • the (meth) acrylate copolymer contains customary and known (meth) acrylates and optionally different, customary and known, olefinically unsaturated monomers copolymerized therefrom.
  • the selection of the (meth) acrylates and the olefinically unsaturated monomers which may differ from them is made in such a way that the property profile of the (meth) acrylate copolymers described above results.
  • suitable (meth) acrylates and, where appropriate, different olefinically unsaturated monomers and the selection rules are known from German patent application DE 197 25 188 A1, page 3, line 4, to page 4, line 38.
  • one or more (meth) acrylates selected from the group consisting of methyl methacrylate, n-butyl acrylate, hydroxyethyl methacrylate, n-butyl methacrylate, acrylic acid and methacrylic acid are used.
  • the (meth) acrylate copolymer is prepared using the customary and known free-radical emulsion copolymerization processes in an aqueous phase, so that the primary dispersion to be used according to the invention results directly.
  • the primary dispersion (B) is pseudoplastic. This means that it has a viscosity that changes greatly depending on its shear: if it is strongly sheared, the viscosity drops; if it is no longer sheared, the viscosity increases again.
  • the primary dispersion (B) preferably has a viscosity of 0.1 to 0.13 Pas at a shear rate less than 100 / s and from 0.07 to 0.08 Pas at a shear rate of about 1000 / s (measured in a shear rate-controlled Rotation viscometer RFSII at 23 ° C; cylinder geometry: cup diameter 34 mm; cylinder diameter 32 mm; cylinder length 36.35 mm; Couette geometry, DIN 53018).
  • the primary dispersion (B) builds up this structural viscosity after its neutralization by the at least one organic amine and / or ammonia (C).
  • the pigment pastes according to the invention contain, based on their total amount, 0.01 to 2% by weight, preferably 0.02 to 1% by weight and in particular 0.02 to 0.5% by weight, at least one, in particular one, organic amine and / or ammonia as component (C).
  • the amine (C) is preferably selected from the group of the tertiary amines, preferably the tertiary alkylamines and in particular the tertiary hydroxyalkylamines.
  • suitable tertiary hydroxyalkylamines are triethanolamine, methyldiethanolamine and dimethylethanolamine, especially dimethylethanolamine.
  • the pigment pastes according to the invention further contain, based on their total amount, 0.1 to 3% by weight, preferably 0.2 to 2% by weight and in particular 0.2 to 1% by weight of at least one, in particular one, nonionic surfactant ,
  • suitable nonionic surfactants or nonionic surfactants cf.
  • Nonionic surfactants are surfactants whose hydrophilicity is adjusted by polyether chains, hydroxyl groups, carboxamide groups, urethane groups and / or ester groups .
  • Nonionic surfactants are commercially available products and are sold, for example, under the brand Tegodispers® 740 by the company Tego or under the brand Hydropalat® 3037 by the company Cognis. Tegodispers ⁇ 740 and Hydropalat ® 3037 are preferred.
  • Hydropalat ® 3037 is a silicone-free, surface-active leveling additive for aqueous systems with a hydroxyl number of 73 to 83 mg KOH / g and a saponification number (DGF CV 3) 56 to 62.
  • Tegodispers ® 740 is a nonionic, modified fatty acid derivative, the aromatic, amine and is nonylphenol ethoxylate free.
  • the pigment pastes according to the invention contain, based on their total amount, at least 10% by weight, preferably at least 20% by weight and in particular at least 40% by weight of an organic solvent, as are usually used in the field of coating materials.
  • suitable solvents are from the book by Dieter Stoye and Werner Freitag (Editors), "Paints, Coatings and Solvents", Second, Completely Revised Edition, Wiley-VCH., Weinheim, New York, 1998, pages 327 to 373.
  • the pigment pastes according to the invention preferably contain water in an amount of 0.5 to 20% by weight, preferably 1 to 15% by weight and in particular 2 to 10% by weight, in each case based on a pigment paste according to the invention.
  • the pigment pastes according to the invention can also contain customary and known additives, as described, for example, in the textbook by Johan Bieleman, “Lackadditive”, Wiley-VCH, Weinheim, New York, 1998.
  • the preparation of the pigment pastes according to the invention does not require any special features in terms of method, but is carried out according to the customary and known methods of producing pigment pastes or pigment preparations by mixing the constituents described above in suitable mixing units such as stirred kettles, dissolvers, Ultraturrax, in-line dissolvers, agitator mills, bead mills or extruder.
  • suitable mixing units such as stirred kettles, dissolvers, Ultraturrax, in-line dissolvers, agitator mills, bead mills or extruder.
  • the pigment pastes (A) according to the invention can be used to produce a wide variety of pigmented mixtures.
  • the pigment pastes according to the invention are used for the production of effect or color and effect, aqueous or non-aqueous coating materials, preferably aqueous coating materials, in particular water-based paints.
  • the pigment pastes according to the invention are mixed in the required amount with the other constituents of the respective pigmented mixtures, preferably the aqueous or non-aqueous coating materials, preferably the aqueous coating materials and in particular the water-based paints, after which the resulting mixtures are homogenized.
  • the other constituents of the respective pigmented mixtures preferably the aqueous or non-aqueous coating materials, preferably the aqueous coating materials and in particular the water-based paints, after which the resulting mixtures are homogenized.
  • suitable constituents are water-soluble and / or dispersible and polymeric and oligomeric binders which are soluble and / or dispersible in organic solvents.
  • the binders are preferably selected from the group consisting of random, alternating and block-like, linear, branched and comb-like (co) polymers of ethylenically unsaturated monomers, polyaddition resins and polycondensation resins. These terms are described in Römpp Lexikon Lacke und Druckmaschine, Georg Thieme Verlag, Stuttgart, New York, 1998, page 457, "Polyaddition” and “Polyadditionharze (polyadducts)", as well as pages 463 and 464, "Polykondensate”, “Polykondensation” and »Polycondensation resins «, as well as pages 73 and 74, »Binders«.
  • the (co) polymers from the group consisting of (meth) acrylate (co) polymers and partially saponified polyvinyl esters, in particular (meth) acrylate copolymers, and the polyaddition resins and
  • Polycondensation resins from the group consisting of polyesters, alkyds, polyurethanes, polylactones, polycarbonates, polyethers, epoxy resin-amine adducts, polyureas, polyamides, polyimides, polyester-polyurethanes, polyether-polyurethanes or polyester-polyether-polyurethanes, in particular polyester-polyurethanes, selected.
  • binders of the kind used in customary and known waterborne basecoats are very particularly preferably used. Binders of this type are described, for example, in German patent application DE 196 52 842 A1, column 2, line 53, to column 3, line 46, and in German patent application DE 199 14 896 A1, column 5, line 34, to column 11 , Line 5.
  • suitable constituents are customary and known crosslinking agents and additives, as described, for example, in German patent application DE 199 14 896 A1, column 11, line 6 to column 16, line 16.
  • suitable constituents are the coloring pigments described above.
  • the resulting pigmented mixtures can be physically, thermally self- and / or cross-linking, curable with actinic radiation or thermally and with actinic radiation.
  • Actinic radiation means near infrared (NIR), visible light, UV radiation, X-rays or gamma radiation, in particular UV radiation, and corpuscular radiation, such as alpha radiation, beta radiation, neutron radiation or electron radiation, in particular electron radiation.
  • NIR near infrared
  • UV radiation visible light
  • X-rays or gamma radiation in particular UV radiation
  • corpuscular radiation such as alpha radiation, beta radiation, neutron radiation or electron radiation, in particular electron radiation.
  • the common thermal curing and curing with actinic radiation is also referred to by experts as dual-cure.
  • the pigmented mixtures preferably the aqueous or non-aqueous coating materials, preferably the aqueous coating materials and in particular the water-based paints, are preferably used for the production of effect or color and effect-giving, decorative, corrosion-protecting, magnetically shielding, magnetically shielding, electrically conductive and / or signal-giving Coatings and varnishes, in particular of optically effecting and coloring and optically effecting coatings and varnishes, are used on substrates of all kinds.
  • Suitable substrates are all surfaces to be coated or to be painted which are not damaged by curing the coating materials applied thereon using heat or heat and actinic radiation.
  • Suitable substrates consist, for example, of metals, plastics, wood, ceramics, stone, textiles, fiber composites, leather, glass, glass fibers, glass and rock wool, mineral and resin-bound building materials, such as gypsum and cement boards or roof tiles, as well as composites of these materials.
  • the surfaces of these materials can already be pre-painted or pre-coated.
  • pigmented mixtures, in particular the coating materials, for the coating or painting of bodies of means of transportation of any kind in particular means of transportation powered by muscle power, such as bicycles, carriages or trolleys, aircraft, such as airplanes or zeppelins, floating bodies, such as ships or buoys, rail vehicles and Motor vehicles, such as motorcycles, buses, trucks or cars) or parts thereof; of buildings indoors and outdoors; of furniture, windows and doors; of small industrial parts, of coils, containers and packaging; of white goods; of foils; of optical, electrotechnical and mechanical components as well as of hollow glass bodies.
  • any kind in particular means of transportation powered by muscle power, such as bicycles, carriages or trolleys, aircraft, such as airplanes or zeppelins, floating bodies, such as ships or buoys, rail vehicles and Motor vehicles, such as motorcycles, buses, trucks or cars
  • parts thereof of buildings indoors and outdoors; of furniture, windows and doors; of small industrial parts, of coils, containers and packaging; of white goods; of foils; of optical, electrotech
  • the coating materials and in particular the water-based paints are suitable for the production of original paintwork (OEM) and refinish paintwork for motor vehicles, in particular for cars.
  • the waterborne basecoats are used, in particular, to produce the basecoats of multi-layer finishes that give effect or color and effect.
  • the multi-layer coatings can be produced in different ways. Preference is given to those in German patent application DE 199 30 664 A1, page 15, lines 36 to 58, or in German patent application DE 199 14 896 A1, column 2, line 15 to column 3, lines 24 and column 16 , Line 54, to column 18, line 54, wet-on-wet method described.
  • the usual and known methods and devices for applying and curing coating materials, in particular aqueous coating materials, are used.
  • the multi-layer paintwork can therefore be used with advantage for the original painting and refinishing of luxury cars.
  • aqueous polyurethane dispersion as is usually used for the production of waterborne basecoats
  • a melamine-formaldehyde resin crosslinking agent
  • a methacrylate copolymer as is usually used for the production of water-based paints
  • This mixture was mixed with a total of 6 parts by weight of customary and known water-based paint additives, 1 part by weight of a commercially available matting paste and 3 parts by weight of a talc paste.
  • 4.5 parts by weight of water and 0.5 part by weight of a conventional and known polyurethane thickener were added, after which the resulting mixture was homogenized.
  • the resulting pigment paste was very easy to transport and had a shelf life of several months without a tendency to settle. It showed no gassing or a reduction in the metallic effect even after prolonged storage.
  • the resulting waterborne basecoat was very easy to transport and had excellent storage stability. Due to the excellent orientation of the aluminum effect pigments, the basecoats produced from them had an excellent, particularly pronounced metallic effect. The waterborne basecoat was therefore particularly well suited for the production of multi-layer coatings for high-end cars.

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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)
  • Paints Or Removers (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)

Abstract

La présente invention concerne des pâtes pigmentaires contenant des pigments à effet, qui peuvent être produites à partir d'au moins les constituants suivants: (A) de 10 à 65 % en poids d'au moins un pigment à effet, (B) de 1 à 20 % en poids d'au moins une dispersion primaire monomodale d'un extrait sec de 15 à 40 % en poids, aqueuse, après neutralisation, à structure visqueuse, contenant comme phase en dispersion des particules qui présentent une taille moyenne allant de 10 à 500 nm et qui sont composées d'un noyau hydrophobe et d'une enveloppe hydrophile, les particules étant constituées d'au moins un copolymère de (méth)acrylate avec une température de transition vitreuse située entre 30 et 100 DEG C et un indice d'acidité situé entre 10 et 50 mg KOH/g, (C) de 0,01 à 2 % en poids d'au moins une amine organique et/ou d'ammoniac, (D) de 0,1 à 3,0 % en poids d'au moins un agent tensioactif non ionique et (E) au moins 10 % en poids d'un solvant organique, les % en poids se référant respectivement à la quantité totale d'une pâte pigmentaire. La présente invention concerne également des procédés pour produire ces pâtes pigmentaires, ainsi que leur utilisation pour produire des mélanges pigmentés, notamment des matières de revêtement aqueuses et non aqueuses.
EP04791357A 2003-10-30 2004-10-19 Pates pigmentaires contenant des pigments a effet, procede pour les produire et leur utilisation Withdrawn EP1678265A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10350719A DE10350719A1 (de) 2003-10-30 2003-10-30 Effektpigmente enthaltende Pigmentpasten, Verfahren zu ihrer Herstellung und ihre Verwendung
PCT/EP2004/052814 WO2005042656A1 (fr) 2003-10-30 2004-10-19 Pates pigmentaires contenant des pigments a effet, procede pour les produire et leur utilisation

Publications (1)

Publication Number Publication Date
EP1678265A1 true EP1678265A1 (fr) 2006-07-12

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EP04791357A Withdrawn EP1678265A1 (fr) 2003-10-30 2004-10-19 Pates pigmentaires contenant des pigments a effet, procede pour les produire et leur utilisation

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US (1) US20060293413A1 (fr)
EP (1) EP1678265A1 (fr)
JP (1) JP2007510030A (fr)
DE (1) DE10350719A1 (fr)
WO (1) WO2005042656A1 (fr)

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US20060293413A1 (en) 2006-12-28
DE10350719A1 (de) 2005-06-16
WO2005042656A1 (fr) 2005-05-12

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