EP1343939B1 - Procede de revetement d'un substrat - Google Patents

Procede de revetement d'un substrat Download PDF

Info

Publication number
EP1343939B1
EP1343939B1 EP01988026A EP01988026A EP1343939B1 EP 1343939 B1 EP1343939 B1 EP 1343939B1 EP 01988026 A EP01988026 A EP 01988026A EP 01988026 A EP01988026 A EP 01988026A EP 1343939 B1 EP1343939 B1 EP 1343939B1
Authority
EP
European Patent Office
Prior art keywords
substrate
coating
top coat
press
coat
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.)
Expired - Lifetime
Application number
EP01988026A
Other languages
German (de)
English (en)
Other versions
EP1343939B2 (fr
EP1343939A1 (fr
Inventor
Leif Tommy Persson
Ann Kerstin Birgitta Kjellqvist Lindell
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.)
Akzo Nobel Coatings International BV
Original Assignee
Akzo Nobel Coatings International BV
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8172459&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1343939(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Akzo Nobel Coatings International BV filed Critical Akzo Nobel Coatings International BV
Priority to EP01988026.9A priority Critical patent/EP1343939B2/fr
Priority to DE60130251T priority patent/DE60130251T3/de
Publication of EP1343939A1 publication Critical patent/EP1343939A1/fr
Application granted granted Critical
Publication of EP1343939B1 publication Critical patent/EP1343939B1/fr
Publication of EP1343939B2 publication Critical patent/EP1343939B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/546—No clear coat specified each layer being cured, at least partially, separately
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating
    • D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper
    • 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
    • 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
    • B05D3/12—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 mechanical means
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed

Definitions

  • the present invention relates to a process for the coating of a veneer, solid wood or reconstituted wood substrate.
  • Reconstituted wood substrates are substrates produced from wood particles, fibres, flakes or chips, such as hardboard, medium density fibre board, an oriented strand board also known as a wafer board, flake board, chip board, and particle board. Such a reconstituted wood substrate is typically fabricated under heat and pressure from particles, fibres, flakes or chips.
  • a reconstituted wood substrate is normally produced by treating particles, flakes, chips or fibres with a binder and then arranging these treated particles, flakes, chips or fibres in the form of a mat under dry or wet conditions. The mat is then compressed into a dense substrate, typically in a sheet form, by the application of heat and pressure. In this compression step the mat is compressed to less than 10% of its original thickness, i.e.
  • the thickness of the substrate is compressed by more than 90%.
  • the water is pressed from the mat during this compression step, in the dry process the particles are pressed closely together.
  • the binder binds particles, flakes, chips or fibres and enhances the structural strength and integrity of the reconstituted wood substrate and its water resistance.
  • the reconstituted wood substrate if desired, may be moulded into a desired shape or provided with a textured surface, such as a wood grain texture. Typical examples of reconstituted wood substrates are hardboard, Medium Density Fibreboard (MDF), High Density Fibreboard (HDF), and chip board.
  • JP 57-113051 A a process is disclosed in which a fibre board is prepared.
  • the document describes that wood chips are cooked into a fibrous material and then an adhesive resin is added.
  • the mixture is subsequently hot pressed into a fibre board. Normally, such a mixture is substantially compressed during the hot pressing. After the pressing, the fibre board is released from the hot press.
  • the fibre board is coated with an aqueous solution of an ester compound by means of a spreader, a flow coater or by spraying.
  • a disadvantage of this method is that a relatively large amount of aqueous solution will penetrate into the fibre board.
  • a problem encountered by coating a veneer, solid wood or reconstituted wood substrate is the relatively high absorption of paint into the substrate. This increases the paint consumption of such substrates in comparison to low or non-absorbing substrates. Further, the relatively large amount of paint necessary to coat the substrate results in a longer overall drying time and a larger amount of solvent that has to evaporate from the coating layer.
  • the present invention is directed to a process for the coating of veneer, solid wood or reconstituted wood substrate with a lower paint consumption.
  • the process according to the invention comprises the steps of:
  • a pressure such that the substrate is not substantially compressed is a pressure where the average thickness of the substrate is reduced by less than 10% of its original value.
  • a process where the substrate is not substantially compressed includes any process where the substrate is locally compressed by more than 10%, but wherein the average thickness of the substrate is reduced by less than 10% of its original value. Such local compression can occur when a special pattern is applied to the substrate in the step where heat and pressure are applied to the substrate.
  • a press coating is used to seal the surface of the substrate and to lower its paint absorption.
  • the press coating is applied as an aqueous colloidal dispersion also referred to as a polymer latex emulsion.
  • a press coating comprises particles of a polymer of an ethylenically unsaturated monomer, the polymer having a T g in the range of 10 to 100°C, and filler and/or pigment particles.
  • a polymerized latex emulsion suitable for producing a smooth hard coating on the surface or edge of the substrate comprises from 10 to 60 percent by weight of the emulsion solids of polymer particles of a polymer of an ethylenically unsaturated monomer, the polymer having a T g in the range of 10°C to 100°C, and from 40 to 60 percent by weight of the emulsion solids of pigment and/or filler particles.
  • the press coating normally not only provides a smooth coating on the surface and/or edges of the substrate, but also a layer that improves the adhesion between the substrate and any further coating layers that are applied to the substrate.
  • the latex emulsion can be applied to the substrate by conventional means, such as by curtain coater, spray nozzle, roller coater, flow coater or by extrusion, which is particularly useful for coating edges.
  • the layer can be applied on more than one side of the substrate, such as the front and the back or along the edges of a substantially planar substrate or on the surface of a contoured substrate, such as a moulding or a moulded door panel.
  • the substrate is preheated before application of the latex emulsion at a temperature in the range of 30 - 80°C, preferably 40 - 60°C, during 10 seconds to 5 minutes.
  • the latex layer is dried to a hardened layer by reducing its moisture content. Normally, the layer is dried to a moisture content in the range of 0 to 20 percent by weight of the solids content of the layer.
  • the applicable drying temperature and the drying time are suitably adjusted for the polymerized latex emulsion being used and the thickness of the applied layer.
  • the applicable drying temperature typically varies from ambient temperature to 120°C, preferably from 50°C to 80°C.
  • the drying time is correspondingly reduced for higher applicable drying temperatures and extended for lower applicable drying temperatures.
  • Conventional drying means such as a convection air drying oven or a conveyer belt passing through a tunnel heated by infrared lights, are suitable.
  • the dried layer is then pressed for some time at a pressure that varies from 0.1 N/mm 2 to 3.5 N/mm 2 , preferably from 0.14 N/mm 2 to 2.0 N/mm 2 .
  • the coated layer can be heated during this pressing action.
  • the temperature and time are adjusted to prevent thermal decomposition of the resultant coating or substrate or sticking of the coating to the press platens.
  • the applicable temperature typically varies from 20°C to 300°C.
  • the latex layer is cured for an applicable cure time and an applicable cure temperature suitable for the polymerized latex emulsion used. The cure time and temperature are adjusted to prevent thermal decomposition of the resultant coating or substrate.
  • the applicable cure temperature typically varies from 20°C to 300°C, preferably from 170°C to 235°C, and the applicable cure time varies from 120 minutes to 1 to 5 seconds, preferably from 30 minutes to 1 minute.
  • the cure step preferably is conducted simultaneously under an applicable cure pressure suitable for the polymerized latex emulsion being used.
  • the applicable cure pressure varies from 0.1 N/mm 2 to 3.5 N/mm 2 , preferably from 0.14 N/mm 2 to 2.0 N/mm 2 .
  • the applicable cure temperature varies from 50°C to 250°C, preferably from 150°C to 200°C.
  • the applicable cure time varies from 0.1 second to 5 minutes.
  • Conventional hot pressing means such as a moulding press having pneumatically or hydraulically pressurized heated platens, are suitable for a batch operation, and conventional hot pressing means, such as a pair of heated calendar rolls, a series of heated calendar rolls, a pair of parallel positioned heated conveyer belts, or UV curing lights, may be used for a continuous operation by squeezing the substrate through them. Calendering at elevated temperature is the preferred process for simultaneous pressing and curing of the press coating.
  • the thus obtained smooth coating film on the substrate is then used to apply a next coating layer, for example a top coat.
  • a next coating layer for example a top coat.
  • the coating composition that can be used as a top coat as long as there is good adhesion between the top coat and the coating film on top of the substrate.
  • Both pigmented and pigment-free coating compositions can be used for the top coat.
  • the curing and drying of the top coat can be accelerated by heating the substrate, but in view of its heat-sensitive nature, this is not always possible. Therefore, preference is given to the use of a radiation curable top coat which can be cured within a reasonably short time without the necessity to heat the substrate too much.
  • a radiation curable coating composition for the coating of veneer, solid wood or reconstituted wood subtrates is not advised, since the coating composition will penetrate into the pores, and as the radiation does not reach these areas, the result is uncured coating material. This can give health, safety, and environmental problems, e.g., when the substrate is cut or sanded. These problems occur even years after the lacquer has been applied.
  • a press coating is applied to the substrate before the radiation curable coating composition is applied.
  • This press coating effectively prevents the penetration of the radiation curable coating composition into the substrate.
  • a radiation curable coating composition is a coating composition which is cured using electromagnetic radiation having a wavelength ⁇ ⁇ 500 nm or electron beam radiation.
  • electromagnetic radiation having a wavelength ⁇ ⁇ 500 nm is, e.g., UV radiation.
  • any radiation curable resin or mixtures of resins can be used in the top coat used in the process according to the present invention. These resins are present in an amount of 20 to 100 wt.% of the composition.
  • the resin is present in an amount of 30 to 90 wt.%, more preferred is an amount of 40 to 90 wt.%.
  • Polyester acrylate resins were found to be very suitable for use in the top coat composition. Examples of suitable commercially available polyester acrylate resins are: Crodamer UVP-215, Crodamer UVP-220 (both ex Croda), Genomer 3302, Genomer 3316 (both ex Rahn), Laromer PE 44F (ex BASF), Ebecryl 800, Ebecryl 810 (both ex UCB), Viaktin 5979, Viaktin VTE 5969, and Viaktin 6164 (100%) (all ex Vianova). Epoxy acrylate resins can also be used in the top coat composition.
  • Examples of commercially available epoxy acrylate resins are: Crodamer UVE-107 (100%), Crodamer UVE-130 (both ex Croda) Genomer 2254, Genomer 2258, Genomer 2260, Genomer 2263 (all ex Rahn), CN 104 (ex Cray Valley), and Ebecryl 3500 (ex UCB).
  • Polyether acrylate resins can also be used in the top coat composition.
  • Examples of commercially available polyether acrylate resins are: Genomer 3456 (ex Rahn), Laromer PO33F (ex BASF), Viaktin 5968, Viaktin 5978, and Viaktin VTE 6154 (all ex Vianova).
  • Urethane acrylate resins can also be used in the top coat composition.
  • urethane acrylate resins examples include: CN 934, CN 976, CN 981 (all ex Cray Valley), Ebecryl 210, Ebecryl 2000, Ebecryl 8800 (all ex UCB), Genomer 4258, Genomer 4652, and Genomer 4675 (all ex Rahn).
  • cycloaliphatic epoxide resins Uvacure 1500, Uvacure 1501, Uvacure 1502, Uvacure 1530, Uvacure 1531, Uvacure 1532, Uvacure 1533, Uvacure 1534, Cyracure UVR-6100, Cyracure UVR-6105, Cyracure UVR-6110, and Cyracure UVR-6128, all ex UCB Chemicals
  • SarCat K126 ex.
  • UV-curable water borne resins can be used in the top coat composition used in the process according to the present invention, such as aliphatic polyurethane dispersions (Lux 101 VP ex Alberdingk Boley), in particular (meth)-acryloyl-functional polyurethane dispersions. Very good results can be obtained when the (meth)acryloyl-functional polyurethane resins comprise alkylene oxide groups.
  • radiation curable compounds that are suitable to be used are, e.g., vinyl ether-containing compounds, unsaturated polyester resins, acrylated polyether-polyol compounds, (meth)acrylated epoxidized oils, (meth)acrylated hyper-branched polyesters, silicon acrylates, maleimide-functional compounds, unsaturated imide resins, compounds suitable for photo-induced cationic curing, or mixtures thereof.
  • UV curable monomers can be added as viscosity reducing agents and also reactive oligomers.
  • reactive oligomers are tripropylene glycol diacrylate (TPGDA), hexanediol diacrylate (HDDA), and 2-hydroxyethyl methacrylate (HEMA).
  • the composition can comprise a photoinitiator or a mixture of photoinitiators.
  • suitable photoinitiators that can be used in the radiation curable composition according to the present invention are benzoin, benzoin ethers, benzilketals, ⁇ , ⁇ -dialkoxyacetophenones, ⁇ -hydroxyalkylphenones, ⁇ -aminoalkylphenones, acylphosphine oxides, benzophenone, thioxanthones, 1,2-diketones, and mixtures thereof. It is also possible to use copolymerizable bimolecular photoinitiators or maleimide-functional compounds.
  • Co-initiators such as amine based co-initiators can also be present in the radiation curable coating composition.
  • Daylight cure photoinitiators can likewise be used.
  • suitable commercially available photoinitiators are: Esacure KIP 100F and Esacure KIP 150 (both ex Lamberti), Genocure BDK and Velsicure BTF (both ex Rahn), Speedcure EDB, Speedcure ITX, Speedcure BKL, and Speedcure DETX (all ex Lambson), Cyracure UVI-6990, Cyracure UVI-6974, Cyracure UVI-6976, Cyracure UVI-6992 (all ex Union Carbide), and CGI-901, Darocur 184, Darocur 500, Darocur 1000, and Darocur 1173 (all ex Ciba Chemicals).
  • the presence of a photoinitiator is not necessary.
  • a photoinitiator when electron beam radiation is used to cure the composition, it is not necessary to add a photoinitiator.
  • UV radiation in general a photoinitiator is added.
  • the total amount of photoinitiator in the composition is not critical, it should be sufficient to achieve acceptable curing of the coating when it is irradiated. However, the amount should not be so large that it affects the properties of the cured composition in a negative way.
  • the composition should comprise between 0.1 and 10 wt.% of photoinitiator, calculated on the total weight of the composition when electromagnetic radiation having a wavelength ⁇ ⁇ 500 nm is used to cure the coating.
  • the composition can also contain one or more fillers or additives.
  • the fillers can be any fillers known to those skilled in the art, e.g., barium sulphate, calcium sulphate, calcium carbonate, silicas or silicates (such as talc, feldspar, and china clay).
  • Additives such as stabilizers, antioxidants, levelling agents, antisettling agents, matting agents, rheology modifiers, surface-active agents, amine synergists, waxes, or adhesion promotors can also be added.
  • the coating composition according to the present invention comprises 0 to 50 wt.% of fillers and/or additives, calculated on the total weight of the coating composition.
  • the top coat composition used in the process according to the present invention can also contain one or more pigments. Pigments known to those skilled in the art can be used in the radiation curable composition according to the present invention. However, care should be taken that the pigment does not show a too high absorption of the radiation used to cure the composition.
  • the composition according to the present invention comprises 0 to 40 wt.% of pigment, calculated on the total weight of the coating composition.
  • the top coat can be applied to the substrate by conventional means, such as a curtain coater, spray nozzle, roller coater, or flow coater.
  • one or more other coating layers are applied on top of the smooth coating film on top of the surface before a top coat is applied. This is done, for example, to get a better adhesion of the top coat or to obtain a top coat with special properties.
  • the coating composition that can be used for the coating layer(s), as long as there is good adhesion between the coating layer(s) and the coating film on top of the substrate. Both pigmented and pigment-free coating compositions can be used.
  • the curing and drying times of the coating composition should be as short as possible.
  • the curing and drying of the coating composition can be accelerated by heating the substrate, but in view of its heat-sensitive nature, this is not always possible. Therefore, preference is given to the use of a radiation curable coating composition.
  • the same types of coating compositions can be used as for the top coat layer, albeit that it is not necessary that the additional intermediate coating layer(s) and the top coat have the same composition.
  • UV curable monomers can be added as viscosity reducing agents and reactive oligomers.
  • reactive oligomers are tripropylene glycol diacrylate (TPGDA), hexanediol diacrylate (HDDA), and 2-hydroxyethyl methacrylate (HEMA).
  • TPGDA tripropylene glycol diacrylate
  • HDDA hexanediol diacrylate
  • HEMA 2-hydroxyethyl methacrylate
  • the intermediate coating layer(s) can be applied to the substrate by conventional means, such as by curtain coater, spray nozzle, roller coater, or flow coater.
  • a printing is applied to the substrate before the top coat is applied. This can be done to obtain a substrate with a special surface structure, colouring, or texture.
  • a process wherein all coating and curing steps are performed on a single production line.
  • the substrate is placed on a belt which moves at a continuous speed.
  • the substrate is then successively coated with the press coat, heated and pressed to dry and cure the press coat, optionally coated with additional coating layer(s), heated or treated in another way to cure the optionally present layer(s), optionally provided with a printing, coated with a top coat, and heated or treated in another way to cure the top coat.
  • the invention further relates to a veneer, solid wood or reconstituted wood subtrate coated with a press coat and at least one radiation curable coating layer with an amount of unreacted double bonds in the substrate after curing of the radiation curable coating layer, as measured by IR Chromatography, of less than 15%, preferably less than 10%, of the total amount of double bonds present in the uncured coating composition.
  • This low amount of unreacted double bonds is probably due to the effective sealing of the porous surface of the substrate by using the press coat. Due to this sealing, the penetration of the radiation curable coating layer into the substrate is reduced.
  • IR Chromatography within the context of this application should be taken to mean Chromatography followed by Infrared spectroscopy, for instance Gas Chromatography followed by Infrared spectroscopy. If Liquid Chromatography is used, care should be taken that the IR spectrum of the mobile phase does not interfere with the IR spectrum of the sample.
  • the amount of extractables can be measured by removal of a 5 cm 2 ⁇ 1-2 mm sample from the surface of the substrate, extraction of the sample with dichloromethane, and analysis of the dichloromethane containing the extractables by GC/FID (Gas Chromatography / Flame Ionization Detection) in combination with GC/MS (Gas Chromatography / Mass Spectroscopy).
  • MDF Medium Density Fibre board
  • Example 1A By way of comparison, using the same conditions a coated MDF substrate was prepared not using a press coat.
  • a solvent borne sealer coating (Proff Surf 150 available from Akzo Nobel Wood Coatings AB Sweden) was applied
  • a white pigmented solvent borne top coat of Example 1A was applied at 100 g/m 2 .
  • the sealer coating had to be applied at 100 g/m 2 .
  • 100% more solvent had to be used to obtain a coated MDF substrate with the same properties and appearance.
  • the energy consumption of the whole process was higher in view of the larger volume of solvent that had to be evaporated.
  • a Medium Density Fibre board (MDF) substrate was placed on a belt moving at a speed of 15 m/min and the white pigmented press coat of Example 1A was applied to the MDF substrate at 15-20 g/m 2 .
  • the press coat was allowed to dry by passing the MDF substrate through an oven and the press coat was pressed and cured by passing through a pair of calendering rolls at a temperature between 150°C and 200°C and a pressure of about 1 N/mm 2 .
  • a white pigmented top coat (IC 102 lkeawhite 5 available from Akzo Nobel Wood Coatings AB Sweden diluted to a solids content of 35 wt.%) was applied with a curtain coater at 100 g/m 2 .
  • the top coat was allowed to cure by passing the substrate through a second oven. The whole process was performed on a single production line without removing the substrate from the belt.
  • a coated MDF substrate was prepared not using a press coat.
  • a solvent borne sealer coating (Proff Surf 150 available from Akzo Nobel Wood Coatings AB Sweden) was applied
  • the white pigmented top coat of Example 2A was applied at 100 g/m 2 .
  • the sealer coating had to be applied at 100 g/m 2 .
  • 100% more solvent had to be used to obtain a coated MDF substrate with the same properties and appearance.
  • the energy consumption of the whole process was higher in view of the larger volume of solvent that had to be evaporated.
  • a Medium Density Fibre board (MDF) substrate was placed on a belt moving at a speed of 15 m/min and the white pigmented press coat of Example 1A was applied to the MDF substrate at 15-20 g/m 2 .
  • the press coat was allowed to dry by passing the MDF substrate through an oven and the press coat was pressed and cured by passing through a pair of calendering rolls at a temperature between 150°C and 200°C and a pressure of about 1 N/mm 2 .
  • a white pigmented water borne top coat (Aqua Tumble Line available from Akzo Nobel Wood Coatings AB Sweden) was applied with a curtain coater at 100 g/m 2 .
  • the top coat was allowed to cure by passing the substrate through a second oven. The whole process was performed on a single production line without removing the substrate from the belt.
  • a coated MDF substrate was prepared not using a press coat.
  • a water borne primer coating Aqua Tffen Line available from Akzo Nobel Wood Coatings AB Sweden, was applied
  • the same white pigmented water borne coating was applied as a top coat at 100 g/m 2 .
  • the primer coating had to be applied at 100 g/m 2 .
  • the energy consumption of the whole process was higher in view of the larger volume of water that had to be evaporated.
  • a Medium Density Fibre board (MDF) substrate was placed on a belt moving at a speed of 15 m/min and the white pigmented press coat of Example 1A was applied to the MDF substrate at 15-20 g/m 2 .
  • the press coat was allowed to dry by passing the MDF substrate through an oven and the press coat was pressed and cured by passing through a pair of calendering rolls at a temperature between 150°C and 200°C and a pressure of about 1 N/mm 2 .
  • the following coating layers were applied:
  • a coated MDF substrate was prepared not using a press coat.
  • a UV putty IF 401 UV light filler available from Akzo Nobel Wood Coatings AB Sweden
  • a UV putty was applied at 20 g/m 2 and cured.
  • the following coating layers were applied:
  • a Medium Density Fibre board (MDF) substrate was placed on a belt moving at a speed of 15 m/min and the white pigmented press coat of Example 1A was applied to the MDF substrate at 15-20 g/m 2 .
  • the press coat was allowed to dry by passing the MDF substrate through an oven and the press coat was pressed and cured by passing through a pair of calendering rolls at a temperature between 150°C and 200°C and a pressure of about 1 N/mm 2 .
  • a white pigmented water borne primer IP 610 Aqua Primer 2 available from Akzo Nobel Wood Coatings AB Sweden
  • IP 610 Aqua Primer 2 available from Akzo Nobel Wood Coatings AB Sweden
  • UV curable top coat (UV top coat Amazon No. 5 available from Akzo Nobel Wood Coatings AB Sweden) was applied with an Optiroller at 5 g/m 2 .
  • the top coat was allowed to cure by passing the substrate under a UV lamp. The whole process was performed on a single production line without removing the substrate from the belt.
  • a coated MDF substrate was prepared not using a press coat.
  • a water borne primer coating IP 610 Aqua Primer 2 available from Akzo Nobel Wood Coatings AB Sweden
  • a white pigmented UV curable top coat UV top coat Amazon No. 5 available from Akzo Nobel Wood Coatings AB Sweden
  • the primer coating had to be applied in 3 passes at 35 g/m 2 .
  • the energy consumption of the whole process was higher in view of the larger volume of water that had to be evaporated. Further, the paint consumption in the comparative process was higher
  • a Medium Density Fibre board (MDF) substrate was placed on a belt moving at a speed of 15 m/min and the white pigmented press coat of Example 1A was applied to the MDF substrate at 15-20 g/m 2 .
  • the press coat was allowed to dry by passing the MDF substrate through an oven and the press coat was pressed and cured by passing through a pair of calendering rolls at a temperature between 150°C and 200°C and a pressure of about 1 N/mm 2 .
  • a UV curable putty IF 401 UV light filler available from Akzo Nobel Wood Coatings AB Sweden
  • the putty was allowed to cure by passing the substrate under a UV lamp.
  • a UV curable sealer coating (IS 483 W-W UV Sealer available from Akzo Nobel Wood Coatings AB Sweden) was applied at 6-8 g/m 2 .
  • the sealer was allowed to cure by passing the substrate under a UV lamp.
  • a W curable top coat (UV top coat Amazon no. 5 available from Akzo Nobel Wood Coatings AB Sweden) was applied at 5 g/m 2 .
  • the top coat was allowed to cure by passing the substrate under a UV lamp. The whole process was performed on a single production line without removing the substrate from the belt.
  • Example 6A By way of comparison, using the same conditions a coated MDF substrate was prepared not using a press coat. To obtain a substrate with the same properties and appearance as in Example 6A, the UV curable putty of Example 6A had to be applied at 15-40 g/m 2 . In comparison to Example 6A, in this comparative example more paint had to be used to obtain a substrate with the same properties and appearance, resulting in a higher overall cost price. Further, in the coated substrate of Example 6B approximately 25% of the double bonds in the coating composition were not converted, while in the coated substrate of Example 6A only 7% of the double bonds in the coating composition were not converted. The conversion of double bonds was measured by IR Chromatography. The amount of unconverted double bonds in the coated substrate indicates that the material contains uncured monomeric material.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)

Claims (8)

  1. Procédé pour le revêtement d'un substrat en placage, en bois massif, ou en bois reconstitué, comprenant les étapes consistant à :
    a) appliquer au substrat un revêtement sous presse sous la forme d'une dispersion aqueuse colloïdale ;
    b) appliquer de la chaleur et de la pression au substrat revêtu pour durcir le revêtement sous presse et pour obtenir un substrat ayant un film de revêtement lisse, la pression étant telle que le substrat ne soit pas sensiblement compressé ;
    c) appliquer une couche de finition au substrat après le durcissement du revêtement sous presse ; et
    d) durcir ladite couche de finition.
  2. Procédé selon la revendication 1, caractérisé en ce que, dans une étape additionnelle avant application de la couche de finition, un revêtement d'apprêt est appliqué et durci.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que toutes les étapes du procédé sont réalisées sur une seule ligne de production.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la couche de finition est une couche de finition durcissable par irradiation et la couche de finition durcissable par irradiation est durcie au moyen d'un rayonnement UV.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, avant application de la couche de finition, une impression est appliquée sur le substrat et la couche de finition est appliquée au-dessus de ladite impression.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le revêtement sous presse est une dispersion aqueuse colloïdale comprenant des particules d'un polymère d'un monomère à insaturation éthylénique et de 40 à 60 % en poids, par rapport au poids total de l'extrait sec d'émulsion, d'une charge et/ou d'un pigment.
  7. Substrat en placage, en bois massif, ou en bois reconstitué, revêtu d'un revêtement sous presse et d'au moins une couche de revêtement durcissable par irradiation, comprenant des doubles liaisons n'ayant pas réagi, dans lequel la quantité de doubles liaisons n'ayant pas réagi dans le substrat après durcissement de la couche de revêtement durcissable par irradiation, telle que mesurée par chromatographie IR, est inférieure à 15 % de la quantité totale de doubles liaisons présentes dans la composition de revêtement non durcie.
  8. Substrat selon la revendication 7, caractérisé en ce que la quantité de doubles liaisons n'ayant pas réagi dans le substrat, telle que mesurée par chromatographie IR, est inférieure à 10 % de la quantité totale de doubles liaisons présentes dans la composition de revêtement non durcie.
EP01988026.9A 2000-12-19 2001-12-10 Procede de revetement d'un substrat Expired - Lifetime EP1343939B2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01988026.9A EP1343939B2 (fr) 2000-12-19 2001-12-10 Procede de revetement d'un substrat
DE60130251T DE60130251T3 (de) 2000-12-19 2001-12-10 Verfahren zum beschichten eines substrates

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP00204622 2000-12-19
EP00204622 2000-12-19
PCT/EP2001/014778 WO2002050374A1 (fr) 2000-12-19 2001-12-10 Procede de revetement d'un substrat
EP01988026.9A EP1343939B2 (fr) 2000-12-19 2001-12-10 Procede de revetement d'un substrat

Publications (3)

Publication Number Publication Date
EP1343939A1 EP1343939A1 (fr) 2003-09-17
EP1343939B1 true EP1343939B1 (fr) 2007-08-29
EP1343939B2 EP1343939B2 (fr) 2013-07-03

Family

ID=8172459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01988026.9A Expired - Lifetime EP1343939B2 (fr) 2000-12-19 2001-12-10 Procede de revetement d'un substrat

Country Status (9)

Country Link
EP (1) EP1343939B2 (fr)
CN (3) CN100361795C (fr)
AT (1) ATE371767T1 (fr)
AU (1) AU2002240836A1 (fr)
CZ (1) CZ304627B6 (fr)
DE (1) DE60130251T3 (fr)
PL (1) PL193255B1 (fr)
PT (1) PT1343939E (fr)
WO (1) WO2002050374A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ304627B6 (cs) * 2000-12-19 2014-08-13 Akzo Nobel N. V. Způsob povrchové úpravy substrátu

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005002059A1 (de) * 2005-01-14 2006-07-27 Kronotec Ag Holzwerkstoff mit ableitfähiger Oberfläche
CA2568440C (fr) * 2004-05-28 2015-05-05 Kronotec Ag Panneau en materiau derive du bois presentant un revetement de surface
DE102009002048A1 (de) 2009-03-31 2010-10-07 Klebchemie M.G. Becker Gmbh & Co. Kg Haftvermittler für Lackierungen und Drucke
CN102285193B (zh) * 2011-05-18 2014-01-01 北京兴有丰科科技发展有限公司 一种水性胶干式热压复膜方法
CN103981717B (zh) * 2014-05-27 2016-01-20 广东溢达纺织有限公司 具涂层的绳头及其制备方法
ES2927206T3 (es) 2017-04-28 2022-11-03 ACTEGA Schmid Rhyner AG Dispositivo y procedimiento para la generación de un revestimiento texturizado
CN107096701A (zh) * 2017-04-29 2017-08-29 安徽阜南县向发工艺品有限公司 增强家具木质用品表面耐酸性腐蚀的方法
FI128812B (fi) * 2018-01-23 2020-12-31 Teknologian Tutkimuskeskus Vtt Oy Päällystetty puuviilu ja menetelmä puuviilun käsittelemiseksi
CN111570232A (zh) * 2020-05-26 2020-08-25 梦天家居集团股份有限公司 一种uv底漆和水性面漆辊涂工艺

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4839442B1 (fr) * 1969-07-11 1973-11-24
US4675234A (en) * 1980-10-01 1987-06-23 Tarkett Ab Radiation cured coating and process therefor
JPS57113051A (en) * 1980-12-31 1982-07-14 Noda Plywood Mfg Co Ltd Manufacture of fiber board
JPS59199775A (ja) † 1983-04-28 1984-11-12 Mitsui Toatsu Chem Inc 水分散塗料用組成物
US4587141A (en) * 1983-12-15 1986-05-06 U.S. Plywood Corporation Laminated panel and process
DE3505750A1 (de) * 1985-02-20 1986-08-21 Basf Ag, 6700 Ludwigshafen Campherdithiolen-komplexe und deren verwendung
JP2810516B2 (ja) * 1990-08-28 1998-10-15 松下電工株式会社 木材の塗装方法
JPH0623951A (ja) * 1992-07-10 1994-02-01 Toyo Polymer Kk リサイクルできる紙の表面処理方法
JPH0860070A (ja) * 1994-08-23 1996-03-05 Nippon Paint Co Ltd 硬化性樹脂組成物、塗料組成物、塗装方法及び塗装物
WO1998029489A1 (fr) * 1996-12-31 1998-07-09 Wayne Pigment Corp. Additif pour peinture aqueuse conçu pour empecher la coloration et procedure correspondante
PL193255B1 (pl) * 2000-12-19 2007-01-31 Akzo Nobel Nv Sposób powlekania podłoża z forniru, litego drewna i przetworzonego drewna oraz podłoże z forniru, litego drewna i przetworzonego drewna pokryte powłoką

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ304627B6 (cs) * 2000-12-19 2014-08-13 Akzo Nobel N. V. Způsob povrchové úpravy substrátu

Also Published As

Publication number Publication date
EP1343939B2 (fr) 2013-07-03
DE60130251T3 (de) 2013-11-07
CN100361795C (zh) 2008-01-16
CZ20031720A3 (cs) 2003-11-12
PT1343939E (pt) 2007-12-06
CZ304627B6 (cs) 2014-08-13
CN100522522C (zh) 2009-08-05
CN1788954A (zh) 2006-06-21
PL362434A1 (en) 2004-11-02
CN1481465A (zh) 2004-03-10
DE60130251D1 (de) 2007-10-11
AU2002240836A1 (en) 2002-07-01
PL193255B1 (pl) 2007-01-31
EP1343939A1 (fr) 2003-09-17
ATE371767T1 (de) 2007-09-15
DE60130251T2 (de) 2008-05-15
CN1240906C (zh) 2006-02-08
WO2002050374A1 (fr) 2002-06-27
CN1788953A (zh) 2006-06-21

Similar Documents

Publication Publication Date Title
US20020081393A1 (en) Process for coating a substrate
US4309452A (en) Dual gloss coating and process therefor
US4246315A (en) Carrier materials impregnated with thermosetting resins, process for their manufacture and their use
RU2311967C2 (ru) Термоплавкая покрывная композиция для способов переноса пленки и отливки
EP1343939B1 (fr) Procede de revetement d'un substrat
US20060083864A1 (en) Radiation curable hot melt composition and a process for the application thereof
EP1722947B1 (fr) Reparation de dommage naturel lors de la production d'articles en bois
US5573832A (en) Method for producing coated wood-based panels with rounded edges and panels obtained thereby
EP1633496B1 (fr) Reparation localisee de substrats revetus
JPH11207877A (ja) 化粧板およびその製造方法
JPH11198282A (ja) 無機質系化粧板及びその製造方法
JP2001303477A (ja) 化粧紙の製造方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030425

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: AKZO NOBEL COATINGS INTERNATIONAL B.V.

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60130251

Country of ref document: DE

Date of ref document: 20071011

Kind code of ref document: P

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 20071127

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071210

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070829

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070829

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070829

Ref country code: LI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070829

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070829

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070829

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071130

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070829

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

26 Opposition filed

Opponent name: BECKER ACROMA KOMMANDITBOLAAG

Effective date: 20080528

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071231

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20071210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071210

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070829

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070829

PLCK Communication despatched that opposition was rejected

Free format text: ORIGINAL CODE: EPIDOSNREJ1

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO

APBM Appeal reference recorded

Free format text: ORIGINAL CODE: EPIDOSNREFNO

APBP Date of receipt of notice of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA2O

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

R26 Opposition filed (corrected)

Opponent name: BECKER ACROMA KOMMANDITBOLAAG

Effective date: 20080528

APBQ Date of receipt of statement of grounds of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA3O

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071231

APBU Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9O

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 20130703

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

REG Reference to a national code

Ref country code: DE

Ref legal event code: R102

Ref document number: 60130251

Country of ref document: DE

Effective date: 20130703

REG Reference to a national code

Ref country code: SE

Ref legal event code: RPEO

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PT

Payment date: 20201124

Year of fee payment: 20

Ref country code: FR

Payment date: 20201227

Year of fee payment: 20

Ref country code: SE

Payment date: 20201228

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20201229

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 60130251

Country of ref document: DE

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20211220