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WO2020234268A1 - Procédé de revêtement d'une surface - Google Patents

Procédé de revêtement d'une surface Download PDF

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Publication number
WO2020234268A1
WO2020234268A1 PCT/EP2020/063905 EP2020063905W WO2020234268A1 WO 2020234268 A1 WO2020234268 A1 WO 2020234268A1 EP 2020063905 W EP2020063905 W EP 2020063905W WO 2020234268 A1 WO2020234268 A1 WO 2020234268A1
Authority
WO
WIPO (PCT)
Prior art keywords
glaze
curing
weight
mpa
curing glaze
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.)
Ceased
Application number
PCT/EP2020/063905
Other languages
German (de)
English (en)
Inventor
Ingo Hörsting
Sebastian Frerick
Kai Thiele
Beatrice Wontora
Georg Bender
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.)
Brillux GmbH and Co KG
Original Assignee
Brillux GmbH and 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 and Co KG filed Critical Brillux GmbH and Co KG
Priority to EP20727957.1A priority Critical patent/EP3973023A1/fr
Publication of WO2020234268A1 publication Critical patent/WO2020234268A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
    • B05D7/08—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood using synthetic lacquers or varnishes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/46—Polymerisation initiated by wave energy or particle radiation
    • C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
    • 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
    • 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
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
    • 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
    • C09D7/20—Diluents or solvents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2502/00—Acrylic polymers
    • B05D2502/005—Acrylic polymers modified
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2601/00—Inorganic fillers
    • B05D2601/02—Inorganic fillers used for pigmentation effect, e.g. metallic effect
    • B05D2601/10—Other metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/02—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a matt or rough surface
    • 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
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C08K5/101—Esters; Ether-esters of monocarboxylic acids

Definitions

  • the invention relates to a method for coating a surface, a system comprising a glaze and a UV radiator, a use of a glaze or a system for coating a surface, and a UV-curing glaze.
  • UV-curing glazes there is the problem that the oxygen present in the atmosphere can hinder the complete and uniform curing of the glaze. Consequently, additional precautions must be taken regularly for the curing of UV-curing glazes, with which the oxygen content in the
  • Ambient air is controlled. This is achieved, for example, in UV coating systems through controlled, shielded chambers for the
  • UV curing of the coating does not allow the flexible application of a coating glaze to objects such as furniture, doors or door frames directly at the customer's site.
  • the object of the present invention is thus to provide a method with which objects such as pieces of furniture, doors, door frames or garden furniture can be coated uniformly and completely in a short time. This should also be possible directly with the customer.
  • the glaze applied to the surface of an object in the course of the process should adhere well to the object, be resistant to mechanical effects and / or weathering and / or be visually appealing
  • a further object of the invention is to provide a method that can be carried out simply and by means of which objects can be glazed with little effort.
  • Another object of the invention is to provide a method in which a glaze can be applied in a common application by means of rolling, brushing and spraying.
  • the UV-curing glaze contains and wherein the UV-curing glaze has a viscosity of 10 to 1000 mPa s at a shear rate of 1000 s -1 , and
  • step b Hardening the in step a. applied glaze using UV-A radiation.
  • objects can be coated with common painting utensils directly on site.
  • a particularly uniform hardening of the applied glaze is achieved can also be applied particularly thinly and evenly in the course of the method according to the invention.
  • the inventive method can be
  • the UV-curing glaze used in the process according to the invention with a viscosity of 10 to 1000 mPa-s at a shear rate of 1000 s -1 can be applied with conventional painting utensils such as brushes or rollers and cured immediately afterwards using UV-A radiation.
  • the mentioned viscosity enables the application of a glaze layer with a small layer thickness, whereby an excellent appearance is achieved.
  • the UV-curing glaze is optimally handleable for mobile use
  • the selected viscosity ensures good penetration of the UV-curing glaze into the surface of the material to be coated, in particular wood. This contributes to the good adhesion properties of the coatings produced with the method according to the invention.
  • the setting of the viscosity mentioned leads to a uniform viscosity
  • the method according to the invention also provides a film coating which protects the coated surface particularly well against mechanical and / or chemical effects.
  • glazes are understood to mean, in particular, coatings that have a maximum hiding power of 90% at 50 ml / m 2 , measured in accordance with standard EN ISO 6504-3, in particular standard EN ISO 6504-3: 2007, method B on black and white cards (Section 5.1.2). Glazes within the meaning of the invention are in particular transparent or semitransparent or
  • the UV-curing glaze has a viscosity of 50 to 800 mPas, preferably from 100 to 700 mPas, more preferably from 200 to 600 mPas or, at a shear rate of 1000 s -1 particularly preferably from 300 to 500 mPa ⁇ s. It has been shown that a glaze with such a viscosity can be applied particularly well to surfaces with ordinary painting utensils such as brushes and rollers, adheres well to the surface, does not smear, has a long processing time and only when treated with UV-A - Radiation cures quickly and completely.
  • the desired viscosity of the UV-curing glaze can be achieved in different ways that are familiar to the person skilled in the art.
  • One way to achieve the desired viscosity of the UV-curing glaze can be achieved in different ways that are familiar to the person skilled in the art.
  • Adjusting the viscosity consists in that a binder is selected as the binder of the UV-curing glaze which, at a shear rate of 100 s -1, has a viscosity of 65 to 300 mPa-s, preferably from 70 to 200 mPa-s or particularly preferably from 80 to 150 mPa-s. If the binder has a viscosity in this range, a homogeneous glaze can be produced particularly well, which can be easily applied to surfaces using common painting utensils.
  • Suitable binders are known to the person skilled in the art and are described in more detail below.
  • the viscosity can be adjusted by selecting a compound as the reactive diluent for the UV-curing glaze which, at a shear rate of 100 s -1, has a viscosity of 0.1 to 60 mPa ⁇ s, preferably of 1 to 40 mPa ⁇ s, preferably from 3 to 30 mPa ⁇ s or particularly preferably from 5 to 20 mPa ⁇ s.
  • a reactive thinner with such a viscosity helps ensure that the glaze is sufficiently thin to be spreadable.
  • a reactive thinner with such a viscosity can mix particularly well with the binder and in this way ensure a homogeneous glaze.
  • Suitable reactive thinner are known to the person skilled in the art and are described below by way of example.
  • Reactive diluents are known to the person skilled in the art.
  • the reactive thinner has a lower viscosity than the binder.
  • the viscosity can be determined with an MCR 92 rheometer at a temperature of 20 ° C.
  • a plate geometry (diameter 50 mm) can be used for plate-on-plate measurement (distance 0.5 mm). 100 s -1, or from 0.01 - - preferably a shear ramp of 0.01 s in this case is driven 1000 sec -1.
  • UV-curing glaze from 30 to 80% by weight, preferably from 35 to 75% by weight, more preferably from 40 to 72% by weight or particularly preferably from 45 to 70% by weight, based in each case on the total weight of the glaze, binder .
  • this content of binder a particularly complete and uniform curing of the UV-curing glaze can be achieved by means of UV-A radiation.
  • any binders that can be cured by means of UV-A radiation are suitable for the UV-curing glaze.
  • the binder of the UV-curing glaze contains a compound selected from the group consisting of unsaturated esters, unsaturated polyesters, unsaturated ethers, unsaturated polyethers, epoxy acrylates, epoxy resins, (meth) acrylic acid, (meth) acrylic acid esters, polyester acrylates ,
  • Polyether acrylates polyurethanes, polyurethane acrylates, glycidyl (meth) acrylates, unsaturated acrylate resins, polydialkylsilanes with terminal silanol groups, hydroxyalkyl acrylates, polydialkylsilanes with terminal epoxy groups,
  • alkoxylated trimethylol propane triacrylate and mixtures thereof.
  • Oxygen radicals can react with the polymerizing components of the binder and / or the reactive thinner of the glaze and lead to the termination or slowdown of the polymerization reaction.
  • the glaze may not harden completely or evenly.
  • the binding agent of the UV-curing glaze has at least one functional group, one of which is in a reaction with a radical
  • Hydrogen atom is split off homolytically.
  • a group that provides a hydrogen radical in reaction with a radical such as a peroxy radical.
  • homolytically split off it is meant that a hydrogen radical (and not a positively charged hydrogen ion) is released from the functional group.
  • Hydrogen atom is split off homolytically can here for example be contained in one of the compounds mentioned above as binders, for example by modifying the corresponding compound by introducing such a functional group.
  • a compound that has such a functional group can also be added to the glaze as a further compound.
  • there are consequently at least two compounds next to one another as binders the first compound preferably being a common binder that cures under UV-A radiation and the second compound being a compound which comprises a functional group , of which a hydrogen atom homolytically in a reaction with a radical
  • the functional group from which a hydrogen atom is homolytically split off in a reaction with a radical is selected from thiol, amine and ether.
  • thiols, amines and / or ethers as the functional group, particularly uniform and rapid curing of the glaze can be guaranteed by means of UV-A radiation.
  • Thiols have the highest reactivity and efficiency and are therefore particularly suitable for glazes that are to be used directly.
  • thiols can lead to an increase in the viscosity of the stored glaze due to side reactions. A particularly good one
  • the binder contains a compound which contains both a functionality that leads to a polymerization reaction by means of UV-A radiation and a functional group from which a hydrogen atom is homolytically split off in a reaction with a radical .
  • Such compounds include, for example, compounds selected from the group consisting of mercapto-, amino- or alkoxy-modified unsaturated esters, mercapto-, amino- or alkoxy-modified unsaturated polyesters, mercapto-, amino- or alkoxy-modified unsaturated ethers, mercapto- , amino- or alkoxy-modified unsaturated polyethers, mercapto, amino- or alkoxy-modified epoxy acrylates, mercapto, amino- or alkoxy-modified epoxy resins, mercapto, amino- or alkoxy-modified (meth) acrylic acid, mercapto, amino - Or alkoxy-modified (meth) acrylic acid esters, mercapto-, amino- or alkoxy-modified polyester acrylates, mercapto-, amino- or alkoxy-modified polyether acrylates, mercapto-, amino- or alkoxy-modified polyurethanes, mercapto-, amino-
  • Trimethylolpropane triacrylate and mixtures thereof are suitable. It has been found to be particularly advantageous if the molar ratio of functional group of which is a hydrogen atom in a reaction with a radical
  • At least two compounds are combined with one another as binders, wherein the first compound polymerizes by means of UV-A radiation and the second compound contains a functional group from which a hydrogen atom is homolytically split off in a reaction with a radical.
  • the first compound is selected from the group consisting of unsaturated esters, unsaturated polyesters, unsaturated ethers, unsaturated polyethers, epoxy acrylates, epoxy resins, (meth) acrylic acid, (meth ) Acrylic acid esters,
  • Polyester acrylates polyether acrylates, polyurethanes, polyurethane acrylates,
  • Glycidyl (meth) acrylates unsaturated acrylate resins, polydialkylsilanes with terminal silanol groups, hydroxyalkyl acrylates, polydialkylsilanes with terminal
  • the second compound is selected from the group consisting of pentaerythritol tetrakis (3-mercaptopropionate), 4-mercaptomethyl-3,6-dithia-1,8-octanedithiol, trimethylolpropane tris (3-mercaptopropionate), pentaerythritol tetrakis (3 mercaptoacetate),
  • Polyethylene glycol dimercaptoacetate polyethylene glycol di (3-mercaptopropionate), pentaerythritol tetrakis (3-mercapto-propionate), mercapto-methyltetrahydrothiophene, tris- (3-mercaptopropyl) isocyanurate, 2-mercaptoethylsulfide (1,2,3- mercaptomercethylsulfide, 1,2,3-mercaptomercethyl-trimethyl) ) -1,3-propanedithiol, dipentaerythrithiol, 1,2,4-trimercaptomethylbenzene, 2,5-dimercaptomethyl-1,4-dithiane,
  • Bisphenofluorenbis (ethoxy-3-mercaptoproprionate), 4,8-bis (mercaptomethyl) -3,6,9-trithia-l, ll-undecanedithiol, 2-mercaptomethyl-2-methyl-l, 3-propanedithiol, 1,8- Dimercapto-3,6-dioxaoctane, thioglycerol bismercapto-acetate, allyl ethers, benzyl ethers and mixtures thereof.
  • a particularly smooth and non-adhesive surface is achieved by using pentaerythritol tetrakis (3-mercaptopropionate) as the second connection.
  • the combination of ethoxylated trimethylolpropane triacrylate is the first to produce a particularly homogeneous, deep-hardening glaze Compound and pentaerythritol tetrakis (3-mercaptopropionate) achieved as the second compound.
  • the ratio of first to second compound can be selected within a wide range, a weight ratio of first to second compound of 65:35 to 95: 5, in particular from 70:30 to 90:10, being particularly advantageous
  • the glaze contains 5 to 60% by weight of reactive thinner.
  • Particularly good flow and curing properties can be achieved if the UV-curing glaze is from 10 to 50% by weight, preferably from 15 to 45% by weight, preferably from 20 to 40% by weight, more preferably from 25 to 38% by weight. % or most preferably from 28 to 35% by weight, each based on the total weight of the glaze,
  • a reactive thinner Contains reactive thinner.
  • a reactive diluent content of less than 5% by weight leads to poor flow behavior and impaired applicability of the glaze.
  • a reactive thinner content of more than 60% by weight leads to poor adhesion of the glaze to the surface and increased adhesion
  • the reactive thinner in the glaze serves, on the one hand, to create the right ones
  • the reactive thinner serves to ensure uniform curing of the glaze. It has been found that the reactive thinner solves these tasks particularly well when the reactive thinner is selected from the UV-curing glaze
  • Monoacrylklareestern in particular octyl acrylate, decyl acrylate, phenoxyethyl acrylate, Norbonylacrylat, dicyclopentadienyl acrylate, polyfunctional Acrylestern of polyalcohols, in particular hexanediol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, Acrylester of polyfunctional polyether alcohols, in particular diethylene glycol acrylate, dipropylene glycol diacrylate, acrylate of ethoxylated glycerol, acrylate of trimethylolpropane, acrylate of di-trimethylol propane , Acrylic acid ester of pentaerythritol, Acrylic acid esters of dipentaerythritol, vinyl ethers, in particular
  • N-vinyl compounds in particular N-vinylpyrrolidone, N-vinylimidazole, N-vinylcaprolactam, and mixtures thereof.
  • Oxybis (methyl-2, l-ethanediyl) diacrylate and / or 1,1,1-trihydroxymethylpropyl triacrylate have proven to be particularly suitable reactive diluents for the glaze according to the method according to the invention.
  • the glaze used in the process according to the invention contains, as a reactive thinner, the combination of oxybis (methyl-2, l-ethanediyl diacrylate (DPGDA) and 1,1,1-trihydroxymethylpropyl triacrylate (TMPTA), which is particularly advantageous for homogeneous hardening of the glaze), this is a ratio of DPGDA and TMPTA from 80:20 to 99: 1, in particular from 90:10 to 95: 5, shown to be particularly advantageous.
  • DPGDA oxybis (methyl-2, l-ethanediyl diacrylate
  • TMPTA 1,1,1-trihydroxymethylpropyl triacrylate
  • the glaze contains 0.1 to 20 wt.% Photoinitiator. It has been shown here that it is ideal for initiating the curing polymerization if the UV-curing glaze is from 0.5 to 15% by weight, preferably from 1 to 10% by weight, or more preferably from 2 to 8% by weight, each based on the total weight of the glaze, contains photoinitiator. With such amounts of photoinitiator, rapid and uniform curing is guaranteed. A photoinitiator content of less than 0.1% by weight leads to an inhomogeneous and sometimes incomplete curing process. A salary
  • Photoinitiator greater than 20% by weight does not lead to any further improvement and, due to the relatively high costs for photoinitiators, leads to a less economical process management.
  • all photoinitiators known to the person skilled in the art are suitable for coatings for the process according to the invention.
  • a particularly homogeneous glaze can be obtained if the photoinitiator of the UV-curing glaze is selected from diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide (TPO), ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate (TPO-L) , Phenyl bis (2,4,6-trimethylbenzoyl) - phosphine oxide, l- [4- (4-benzoylphenylsulfanyl) phenyl) -2-methyl-2- (4-methylphenylsulfonyl) propan-l-one, 2-hydroxy- 2-methyl-l-phenylpropanone, 2- isopropylthioxanthone, 4-isopropylthioxanthone, 2,4-diethylthioxanthone,
  • ketosulfone 4,4'-bis (diethylamino) benzophenone, benzil dimethyl ketal, 1-hydroxycyclohexylphenyl ketone, ⁇ -aminophenyl ketone, bisbenzyolphosphine oxide, 2-morpholin-N-yl-2-2 (4-methylthiobenzoyl) propane, 2-hydroxy-2 benzoyl propane, 1-hydroxycyclohexyl phenyl ketone, benzoin ether, benzil, and mixtures thereof.
  • the ratio of the combination of phosphine oxide photoinitiator to 1- [4- (4-benzoylphenylsulfanyl) phenyl) -2-methyl-2- (4-methylphenylsulfonyl) propan-1-one is from 30:70 to 70:30 ,
  • the requirements for the optical appearance of the glaze can vary.
  • pigments and / or matting agents can be used in the UV-curing glaze in order to achieve certain optical properties.
  • the UV-curing glaze contains 0.1 to 15% by weight, based on the total weight of the glaze, organic and / or inorganic pigments, the glaze also with the organic and / or inorganic pigments having a hiding power of a maximum of 90% at 50 ml / m 2 , measured in accordance with standard EN ISO 6504-3: 2007, in particular EN ISO 6504-3: 2007, on black and white Cards raised, has.
  • transparent pigments By adding “transparent” pigments, a particularly appealing and high-quality appearance can be achieved.
  • EP 0 704 501 A1 can be found.
  • the maximum particle size can be determined using a grindometer according to DIN EN ISO 1524, in particular according to DIN EN ISO 1524: 2013-06.
  • the mean particle size can in particular denote the D 50 value.
  • the D 50 value can in particular denote the size at which 50%, for example 50% by weight, are smaller than the specified size. For example, 50%, for example 50% by weight, of the particles would then pass through a theoretical mesh size. Methods for determining the mean particle size, in particular the D 50 value, are known to the person skilled in the art.
  • the mean particle size, in particular the D 50 value can be determined, for example, by creating a particle size distribution. The measurement can be carried out, for example, by means of light scattering, in particular by means of laser diffractometry or photon correlation spectroscopy.
  • the mean particle size, in particular the D 50 value can be measured in a liquid medium, for example an aqueous medium.
  • the measurement can in particular in accordance with ISO 13321, in particular IS013321: 1996, and / or ISO 22412, in particular ISO 22412: 2008.
  • ISO 13321 in particular IS013321: 1996
  • ISO 22412 in particular ISO 22412: 2008.
  • a Malvern Mastersizer 2000 or 3000 can be used to determine the mean particle size, in particular the D 50 value.
  • Further possibilities for determining the mean particle size, in particular the Dso value are light and / or laser diffraction.
  • the mean particle size, in particular the Dso value can be determined with the aid of an ultracentrifuge or with chromatographic
  • CHDF Capillary Hydrodynamic Fractionation
  • the BET surface area can be determined according to the ISO 9277 standard, in particular according to the ISO 9277: 2010 standard, by means of gas adsorption.
  • inorganic pigments are preferred as pigments
  • pigments used 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 are preferably used as pigments.
  • organic pigments are azo pigments, e.g.
  • Aiylid Yellow (Monoazo) P.Y. 74 polycyclic pigments, e.g. Quinacridones P.R. 122, Perinone P.O. 43, pyrazolo-quinazolone P.O. 67, diketo-pyrrolo-pyrrole (DPP) P.R. 254, Dioxazine P.V. 23 and metal complex pigments, e.g. Copper Phthalocyanine Blue P.B. 15: 3 and Green P.G. 7th
  • the UV-curing glaze contains 0.1 to 20% by weight, in particular 1 to 15% by weight or 3 to 12% by weight, in each case based on the total weight of the glaze, matting agent.
  • a glaze with a particularly attractive, homogeneous gloss level can be obtained.
  • Matting agents selected from silicon dioxide, micronized polypropylene wax coated with silica, silicas, silicates, polyethylene, polypropylene and copolymers or mixtures thereof have proven to be particularly suitable for creating a velvety appearance. If, on the other hand, the use of matting agents is dispensed with, a particularly shiny glaze can be obtained.
  • the UV-curing glaze used in the method according to the invention already has a good shelf life or shelf life. However, this can be increased even further if the UV-curing glaze contains 0.01 to 3% by weight of inhibitor, based in each case on the total weight of the glaze.
  • the inhibitor prevents unwanted partial polymerization of the binder and / or the reactive diluent and in this way increases the shelf life and storage stability of the glaze.
  • the glaze contains a larger amount of photoinitiator than inhibitor, in particular at least 0.5 or at least 1% by weight more photoinitiator than inhibitor, based on the total weight of the glaze. This ensures that the inhibitor does not interfere with the curing polymerization.
  • the UV-curing glaze is essentially free of volatile organic solvents which have a boiling point of below 240 ° C. at 1013 mbar.
  • the UV-curing glaze is particularly preferably essentially free of one or more volatile organic compounds
  • Solvents selected from the group consisting of special boiling point petrol, solvent petrol, white spirit, tetralin, decalin, gum turpentine oil, root turpentine oil, pine oil, benzene, toluene, xylene, cumene, trimethylbenzene
  • UV-curing glaze is less than 100 ppm, in particular less than 10 ppm, based on the total weight of the glaze, volatile organic
  • DSC Differential scanning calorimetry
  • the boiling point can also be determined, for example, by means of a distillation device.
  • the UV-curing glaze applied in the method according to the invention is essentially free of water.
  • the glaze contains less than 1000 ppm, in particular less than 100 ppm or 10 ppm, based on the total weight of the glaze, water. This ensures that no irregularities or drops form in the applied glaze. In addition, this is a particularly good one
  • step a. the process to be applied glaze can also be further, the
  • leveling agents defoamers, rheological additives, preservatives, deaerators, anti-floating agents or lubricants. Typical representatives of these classes of compounds are known to those skilled in the art. Come as a leveling agent
  • Preferred defoamers are hydrocarbons, n-alkanes, cycloalkanes, iso-alkanes, aromatics, mono- and diglycerides, dimethylpolysiloxane and / or silicone oils.
  • the glaze applied according to the invention preferably contains a total of from 0.01 to 5% by weight, in particular from 0.1 to 2% by weight, based on the
  • Preservatives Preservatives, deaerators, anti-floating agents and / or lubricants.
  • the glaze is from 0.01 to 0.5% by weight, preferably from 0.05 to 0.2% by weight, based on the
  • Total weight of the glaze contains leveling agent.
  • a particularly homogeneous one is a particularly homogeneous one
  • Coating that is free from bubbles can be used in the course of the invention
  • the UV-curing glaze contains from 0.1 to 1% by weight, preferably from 0.3 to 0.7% by weight, based on the total weight of the glaze, defoamers.
  • the process according to the invention comprises process step a.
  • UV-curing glaze to be applied essentially consisting of 20 to 90% by weight of binder, 5 to 60% by weight of reactive thinner, 0.1 to 20% by weight of photoinitiator, each based on the total weight of the glaze.
  • the glaze consists essentially of the components mentioned, this means that the glaze is at least 80% by weight, in particular to
  • Up to 20% by weight (or up to 15, 10, 5 or 3% by weight) of the glaze can according to this Embodiment consist of other components, pigments, matting agents, defoamers, leveling agents and / or inhibitors in particular being possible.
  • Such a UV-curing glaze can be cured particularly quickly and inexpensively in the method according to the invention.
  • UV-curing glaze to be applied consisting of 20 to 90% by weight of binder, 5 to 60% by weight of reactive thinner, 0.1 to 20% by weight of photoinitiator, each based on the
  • the glaze does not contain any other components besides binding agent, reactive thinner and photoinitiator. In this way, objects can be coated in a particularly simple and inexpensive manner.
  • the process step b. of the method according to the invention relates to the hardening of the in step a. applied glaze using UV-A radiation.
  • the process step b. of the method according to the invention relates to the hardening of the in step a. applied glaze using UV-A radiation.
  • the UV-A radiation for curing the in step a. applied glaze is emitted by a portable UV lamp. If a UV emitter, in particular a portable UV emitter, is used for curing the glaze in process step b. used, the inventive method can be carried out in a simple manner directly at the customer, the hardening process taking place within a few seconds and thus the entire process
  • the glaze applied to the object can be cured evenly and even corners and edges of the object can be easily reached.
  • a portable UV lamp When a portable UV lamp is mentioned here or elsewhere, this means a UV lamp that can be carried without great effort by the average user in terms of shape, size and weight and for curing in process step b. of the method according to the invention can be used.
  • a portable UV radiator is not a UV radiator that is basically fixed in a stationary manner.
  • the portable UV lamp can also be attached to a suitable tripod.
  • a portable UV radiator preferably comprises a handle so that the user can move the portable UV radiator easily.
  • the radiation emitted by the UV radiator has at least 90%, preferably at least 95% or particularly preferably at least 97%, based on the total radiation emitted by the UV radiator, a wavelength of more than 315 nm.
  • a UV lamp that has radiation with a wavelength of more than 315 nm to this extent is particularly safe for users. In this way, the user is exposed to almost no short-wave and particularly high-energy UV-B and / or UV-C radiation, which is known as
  • Wavelength of more than 315 nm ensures particularly even hardening of the glaze over the entire depth.
  • the UV radiator used preferably has a weight of less than 10 kg, preferably less than 7.5 kg, more preferably less than 5 kg, even more preferably less than 4 kg, more preferably less than 3 kg or particularly preferably from less than 2.5 kg. If the UV lamp has such a weight, it can be easily transported to the customer and can be used flexibly and easily on site.
  • a particular challenge when coating complex objects with decorations, windings, corners and / or highlights is to ensure that the glaze hardens evenly in the different areas of the
  • the UV radiator has a radiation exit area of 0.1 to 300 cm 2 , preferably 50 to 200 cm 2 , more preferably 75 to 150 cm 2 or particularly preferably 90 to 110 cm 2 .
  • a radiation exit surface areas of an object that are otherwise difficult to access, such as surfaces behind corners or edges, can be completely and uniformly cured.
  • the radiation emitted by the UV radiator has an intensity of 30 to 1000 mW / cm 2 , preferably 50 to 500 mW / cm 2 or more preferably 100 at a wavelength of 365 nm to 405 nm up to 200 mW / cm 2 , each measured at a distance of 20 mm with a surface sensor for UV-A radiation with a spectrum from 340 to 405 nm and with a maximum intensity of 5 W / cm 2 .
  • the glaze can be cured particularly evenly.
  • the UV radiator has an electrical power consumption of 40 to 300 W, preferably 50 to 200 W, preferably 60 to 150 W, more preferably 65 to 100 W, more preferably 68 to 72 W or particularly preferred of about 70 W.
  • an electrical power consumption 40 to 300 W, preferably 50 to 200 W, preferably 60 to 150 W, more preferably 65 to 100 W, more preferably 68 to 72 W or particularly preferred of about 70 W.
  • the described method according to the invention can be carried out on completely different surfaces. Basically, surfaces comprising metal, plastic, wood, glass, ceramics, paper, cardboard, wood chips and / or natural resin are possible.
  • the method according to the invention is particularly suitable for coating surfaces made of wood or wood-based materials, in particular
  • Wood-based materials based on solid wood e.g. solid wood, glued wood, glued laminated timber, rod plywood, laminated wood or veneer plywood such as multiplex
  • solid wood e.g. solid wood, glued wood, glued laminated timber, rod plywood, laminated wood or veneer plywood such as multiplex
  • Wood chip materials e.g. chipboard
  • wood fiber materials e.g. Fibreboard
  • Visually particularly attractive and well-protecting glazes are obtained according to the method according to the invention if the surface comprises a material made of natural wood and / or a wood look.
  • natural wood it is particularly solid wood, in which the wood can be assigned to a tree species.
  • Materials made of wood look are materials that are not made entirely of wood, but have a base made of cardboard, wood chip and / or plastic, on which a layer of wood or a layer of another material, which is due to the material or due to a paint finish
  • a surface made of a material with a wood look can consequently also comprise wood.
  • the surface is the surface of a table, a door, a door frame, a worktop, a chest of drawers, a stool, a cupboard, a chair, a shelf, a frame or a piece of furniture. If the surface of such an object is coated by the method according to the invention, the coating is particularly time-efficient and can be carried out directly at the customer's site, which leads to cost savings for the customer.
  • the invention further provides a system comprising a UV-curing glaze and a UV radiator, the UV-curing glaze, in each case based on the
  • UV-curing glaze contains and wherein the UV-curing glaze has a viscosity of 10 to 1000 mPa-s at a shear rate of 1000 s -1 .
  • system according to the invention can be coated.
  • the invention is furthermore directed to the use of a UV-curing glaze or a system comprising a UV-curing glaze and a UV radiator for coating a surface, the UV-curing glaze in each case based on the total weight of the glaze,
  • UV-curing glaze contains and wherein the UV-curing glaze at a shear rate of 1000 s -1
  • the invention is directed to a UV-curing glaze, the UV-curing glaze, based in each case on the total weight of the glaze,
  • UV-curing glaze contains and wherein the UV-curing glaze has a viscosity of 10 to 1000 mPa-s at a shear rate of 1000 s -1 .
  • a matt UV-curing glaze (formulation A) with the following formulation shown in Table 1 was produced by mixing the ingredients given in Table 1, the doses in each case in% by weight:
  • the viscosity of the matt UV-curing glaze was measured using an MCR92 rheometer from Anton Paar ® at 20 ° C. with a PP50 measuring system (plate geometry;
  • the viscosity of the matted UV-curing glaze was determined to be 449 mPa ⁇ s.
  • the matted UV-curing glaze according to formulation A was good
  • UVAHAND LED ® UV lamps from Hönle AG UV Technology (lamp part weight 1.9 kg) cured.
  • the coated surface was sanded again and a second layer of the matt UV-curing glaze with a dry layer thickness of 50 gm was applied applied and cured with the UVAHAND LED® UV lamp.
  • the coated surface had a velvety soft optical impression and the glaze applied had a high degree of transparency.
  • the entire coating of the table was completed within a period of 2 hours.
  • the viscosity of the tinted UV-curing glazes pine and rosewood was tested as described above for the matt UV-curing glaze. This resulted in a viscosity of 372 mPa-s for the UV-curing glaze with the shade of pine and a viscosity of 367 mPa-s for the UV-curing glaze with the shade of rosewood.
  • the tinted UV-curing glazes could be used in accordance with the matted UV Apply hardening glaze (formulation A) to objects such as tables and cure quickly.
  • composition B Another, high-gloss UV-curing glaze (formulation B) with the following formulation shown in Table 3 was produced by mixing the ingredients given in Table 3, the doses in each case in% by weight:
  • the high-gloss UV-curing glaze of formulation B could easily be brushed onto objects in a manner analogous to the matted UV-curing glaze of formulation A and could be cured quickly by means of UV lamps. In this way, articles coated with a high gloss were obtained.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

L'invention concerne un procédé de revêtement d'une surface comprenant au moins les étapes suivantes : (1) application d'une lasure durcissant aux UV sur la surface, la lasure durcissant aux UV contenant, rapporté à son poids total, de 20 à 90 % en poids d'un liant, de 5 à 60 % en poids d'un diluant réactif et de 0,1 à 20 % en poids d'un photo-initiateur, et la lasure durcissant aux UV présentant une viscosité comprise entre 10 et 1000 mPa-s à une vitesse de cisaillement de 1000 s-1, (2) durcissement de la lasure appliquée à l'étape (1) au moyen d'un rayonnement UV-A. L'invention concerne également un système comprenant une lasure durcissant aux UV et un émetteur de rayonnement UV, une utilisation d'une lasure durcissant aux UV ou d'un système comprenant une lasure durcissant aux UV et un émetteur de rayonnement UV pour revêtir une surface, ainsi qu'une lasure durcissant aux UV.
PCT/EP2020/063905 2019-05-20 2020-05-19 Procédé de revêtement d'une surface Ceased WO2020234268A1 (fr)

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DE102019113331.9 2019-05-20
DE102019113331.9A DE102019113331A1 (de) 2019-05-20 2019-05-20 Verfahren zum Beschichten einer Oberfläche

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EP0704499B1 (fr) 1994-09-30 1998-09-09 Bayer Ag Pigments d'oxydes de fer jaunes, très transparents, procédé pour leur préparation et leur utilisation
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