EP1002587B1 - Procédé et appareil pour faire des revêtements réticulés - Google Patents

Procédé et appareil pour faire des revêtements réticulés Download PDF

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Publication number
EP1002587B1
EP1002587B1 EP99121912A EP99121912A EP1002587B1 EP 1002587 B1 EP1002587 B1 EP 1002587B1 EP 99121912 A EP99121912 A EP 99121912A EP 99121912 A EP99121912 A EP 99121912A EP 1002587 B1 EP1002587 B1 EP 1002587B1
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EP
European Patent Office
Prior art keywords
formulation
reactive
coating formulation
crosslinking reaction
reaction
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
EP99121912A
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German (de)
English (en)
Other versions
EP1002587A3 (fr
EP1002587A2 (fr
Inventor
Wolfgang Dr. Schrof
Reinhold Dr. Schwalm
Erich Dr. Beck
Uwe Dr. Meisenburg
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BASF SE
Original Assignee
BASF SE
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Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of EP1002587A2 publication Critical patent/EP1002587A2/fr
Publication of EP1002587A3 publication Critical patent/EP1002587A3/fr
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Publication of EP1002587B1 publication Critical patent/EP1002587B1/fr
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    • 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.

Definitions

  • the present invention relates to a method and an apparatus for production of hardened, in particular of radiation-hardened lacquer layers on one Substrate surface.
  • Coating layers are nowadays u.a. with the help of the method of radiation hardening produced.
  • radiation curing a readily processable mixture of reactive feedstocks and additives by exposure in a three-dimensional, transferred mechanically stable polymer network.
  • This is the reactive paint formulation initially applied to the associated substrate and in a second Step by optical exposure, preferably with a UV-exposure, or by means of Electron beam curing crosslinked.
  • optically via photoinitiators started polymerizations of low-viscosity paint formulations reactive monomers, oligomers and prepolymers, for example the radical Acrylate polymerization or cationic vinyl ether or epoxy polymerization, or the optical crosslinking of linear polymers with reactive side chains.
  • a radiation-curable coating such as the UV coating or electron beam curing of complex shaped three-dimensional surfaces such as that of motor vehicles
  • the exposure must be uniform be done to avoid that at critical points such as edges or left on inner surfaces uncured areas. Residual uncured areas can sometimes lead to sticking, for the emission of low molecular weight Compounds, partially associated with an odor nuisance and / or a health hazard, as well as to deficient gloss and deficient Protective effect of the paint lead. This often makes a costly rework necessary, if not more so the high cost associated disposal more valuable Substrates.
  • For a uniform exposure of large-area substrates To be able to guarantee so far large-area radiators, especially UV lamps be used in combination with 3D robotics.
  • An object of the present invention is therefore an apparatus and a method to provide with their help easy and comparatively fast one uniform lacquer layer without occurrence of problems set out above can be.
  • initiating at least one crosslinking reaction is meant that the crosslinking reaction at this time is not yet running, in the at least a reactive paint formulation but a condition is created due after a certain period of time, the crosslinking reaction will take place.
  • the at least one crosslinking reaction is already before application the paint formulation is initiated on the associated substrate surface. This allows a homogeneous initiation of the crosslinking reaction and thus avoids a non-uniform cross-linking, for example of complex-shaped three-dimensional Substrates, which are often used in conventional painting processes a considerable effort must be made to actually each body of the to treat the varnishing surface equally, so as to obtain a uniform To obtain varnish layer.
  • step a) the crosslinking reaction in the at least one reactive paint formulation optically initiated. This is preferably done by UV exposure or electron irradiation of the at least one reactive paint formulation.
  • a crosslinking reaction must occur be optically activatable, so that from a low-viscosity paint formulation a highly viscous, mechanically stable lacquer layer can arise.
  • the at least one reactive coating formulation comprises at least one photoinitiator.
  • This at least one photoinitiator can interact with appropriately irradiated light in a manner to thereby enable it to initiate the crosslinking reaction in the at least one paint formulation.
  • these are the polymerizations of low-viscosity coating formulations of reactive monomers, oligomers and prepolymers, which have started optically via photoinitiators, or the optical crosslinking of linear polymers with reactive side chains.
  • the radical acrylate polymerization and the cationic vinyl ether or epoxy polymerization can be mentioned here.
  • the still low-viscosity paint formulation is now irradiated with light, preferably with UV light, before being applied to the relevant substrate surface.
  • a homogeneous flooding with UV light can be made by exposing from different sides or the supply line is designed as a UV light guide. It is also advantageous here that it is possible to work with these small dimensions or geometries not only with conventional UV radiators but also with UV lasers. The latter are preferably used because of their simple beam guidance and the possibility of optimally adapting the laser wavelength to the absorption of the photoinitiator system contained in the reactive coating formulation, as described, for example, in J.-P. Fouassier, Photoinitiation, Photopolymerization and Photocuring, Hanser Publishers, Kunststoff, 1995.
  • the corresponding kinetic adjustment of the crosslinking reaction prevents the exposed reactive coating formulation from crosslinking before the impact on the corresponding substrate surface and before its distribution, preferably homogeneous distribution, and thus becoming in a state that uniformly distributes the coating formulation on the substrate surface would make it much more difficult.
  • the time interval between the initiation of the crosslinking reaction and its actual use must be at least so great that the still low-viscosity reactive coating formulation can reach the substrate surface and run there to form a film of the desired homogeneity. Only then does the crosslinking reaction, whereby ultimately a cured lacquer layer is obtained. This has all the mechanical properties, such as scratch resistance and elasticity, as well as good chemical resistance, as they are known from the radiation-cured coating layers prepared by the previous methods.
  • the temperature of the reactive coating formulation is adjusted such that that the crosslinking reaction does not immediately after their initiation, but delayed.
  • the reactive coating formulation is prepared in the manner that the necessary application viscosity is maintained, such as by higher proportions of reactive diluents. The latter grant even when humiliated Temperatures a homogeneous distribution of the paint formulation on the corresponding substrate surface.
  • a heat treatment of the substrate up to 140 ° C, preferably to a temperature below 100 ° C. This will be the use and accelerates the course of the crosslinking reaction.
  • a sufficiently slow crosslinking reaction is used.
  • the reactive coating formulation is selected or synthesized in such a way that the crosslinking reaction to be initiated proceeds sufficiently slowly so that, after it has been initiated, sufficient time remains for the still low-viscosity coating formulation to reach the corresponding substrate surface and to form a homogeneous film run.
  • An example of such a type of reaction is the cationic polymerization. According to J.-P. Fouassier, Photoinitiation, Photopolymerization and Photocuring, Hanser Publishers, Kunststoff, 1995, p. 214, shows such a system with the use of the diglycidyl ether of bisphenol-A.
  • the crosslinking reaction by a spatial separation of Photoinitiators and the reactive, crosslinkable paint formulation ingredients, such as reactive monomers and prepolymers, delayed. there this is done via nanostructuring of the paint formulation.
  • these particles preferably have a diameter in the nm to ⁇ m range, particularly preferably in the range of 10 nm to 100 ⁇ m up.
  • the crosslinking reaction can be slowed down over time, the photoinitiators or their cleavage products to diffuse out of the Need particles.
  • the photoinitiators not just embedded in particles, but in latices or dendrimers fixed.
  • the delay time of the crosslinking reaction that is achieved thereby now corresponds to the time that the reactive constituents of the paint formulation, such as for example, reactive monomers or oligomers, for diffusing into the Need latices.
  • the crosslinking reaction can be slowed down over time which diffuse out the photoinitiators or their cleavage products from the particles.
  • the photoinitiators are embedded not only in particles but in latices or dendrimers fixed.
  • the delay time of the crosslinking reaction resulting is reached now corresponds to the time that the reactive constituents of the paint formulation, such as reactive monomers or oligomers, for diffusing into in the latices need.
  • the rheological properties during the application phase of the Paint formulation dynamically adjusted on the substrate surface. Thereby can Viscosity modifier (rheology additives) are replaced, which in turn is typical Lackierprobleme such as the drainage on vertical surfaces eliminated.
  • step a i. initiating the crosslinking reaction in at least a reactive paint formulation, and step b), namely the homogeneous application the at least one reactive paint formulation prior to the onset of the crosslinking reaction at least one location of the substrate surface, another step a '), namely admixture of at least one UV protection agent the at least one reactive paint formulation.
  • step a i. initiating the crosslinking reaction in at least a reactive paint formulation
  • step b namely the homogeneous application the at least one reactive paint formulation prior to the onset of the crosslinking reaction at least one location of the substrate surface
  • step a ' namely admixture of at least one UV protection agent the at least one reactive paint formulation.
  • a further step a ") is provided between step a) and step b), in which at least one pigment is admixed with the at least one reactive lacquer formulation, whereby the pigment, for example for basecoats, preferably shortly after in the at least one reactive coating formulation, for example by UV exposure of a photoinitiator-containing coating formulation, and shortly before application thereof in turbulent flow, the pigment being preferably dispersed in reactive diluents.
  • the pigment for example for basecoats, preferably shortly after in the at least one reactive coating formulation, for example by UV exposure of a photoinitiator-containing coating formulation, and shortly before application thereof in turbulent flow, the pigment being preferably dispersed in reactive diluents.
  • the inventive method is also for repair or used to repair paint coatings on a substrate surface.
  • the inventive method is used to apply the at least one reactive lacquer formulation prior to insertion the at least one crosslinking reaction at the at least one point of Substrate surface uses a hand spray gun.
  • a hand spray gun is used to apply the at least one reactive lacquer formulation prior to insertion the at least one crosslinking reaction at the at least one point of Substrate surface.
  • the use is a handgun very practical and anywhere on the spot possible.
  • the device is at least one light guide provided with the help of which generated in the at least one exposure unit Light in the at least one application unit with the reactive coating formulation is brought into contact.
  • This at least one, preferably several Light guides, preferably UV light guides are just before the nozzle of the application unit brought in.
  • the application unit is preferably a spray head or an ESTA bell.
  • the light guide is without big Expenditure a homogeneous exposure, especially UV exposure, the reactive Paint formulation reached briefly before leaving the application unit.
  • conventional application systems for example painting robots, and use these with a fiber-coupled exposure, preferably a fiber-coupled one Retrofit UV exposure.
  • FIG. 1 the structure of a suitable device is shown schematically.
  • a feed 5 is the at least one reactive lacquer formulation of a Supply container passed into the nozzle unit 6 provided with an application unit.
  • two light guides 3 and 4 preferably UV light guides appropriate.
  • the exposure unit 1 in which it is preferably is a UV imagesetter, particularly preferably a UV laser, is the Light through a arranged on the exposure unit closure 2, where the Light guide 3, 4 are attached, via these two light guides 3, 4 to the application unit directed, and immediately before the nozzle 6 of the application unit.
  • the optical waveguide 3, 4 shown here is a homogeneous UV exposure of the reactive coating formulation shortly before leaving the Application unit reached directly at the outlet opening of the nozzle 6.
  • the Crosslinking reaction in the reactive paint formulation is thus at this point initiated.
  • the crosslinking reaction is chosen in this way or by other methods kinetically controlled to be at that location, i. immediately before the exit opening the nozzle 6 is initiated, but not yet initiated or expires.
  • the Application unit is at a short distance to the respective, to be painted Substrate surface arranged.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Coating Apparatus (AREA)

Claims (6)

  1. Procédé de préparation d'au moins une couche de peinture à au moins un endroit d'une surface du substrat qui présente au moins les étapes suivantes dans l'ordre suivant :
    a) initiation optique d'au moins une réaction de réticulation dans au moins une formulation de peinture réactive de faible viscosité qui contient des photo-initiateurs et des composants réactifs de formulation de peinture à réticuler,
    b) application de l'au moins une formulation de peinture réactive de viscosité encore plus faible avant l'apparition d'une couche de peinture de viscosité élevée sur au moins un endroit de la surface du substrat,
    caractérisé en ce que la réaction de réticulation est retardée par une séparation spatiale de photo-initiateurs et des composants réactifs de formulation de peinture à réticuler, la séparation spatiale étant atteinte par nanostructuration de la formulation de peinture.
  2. Procédé selon la revendication 1, caractérisé en ce que, dans l'étape a), la réaction de réticulation d'au moins une formulation de peinture réactive est initiée par exposition aux UV.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que la nanostructuration de la formulation de peinture est provoquée en noyant les photo-initiateurs dans des particules d'un diamètre de 10 nm à 100 µm.
  4. Procédé selon l'une des revendications précédentes caractérisé en ce que le procédé présente au moins après l'étape a) et avant l'étape b) l'étape supplémentaire suivante :
    a') mélange d'au moins un agent protecteur UV à au moins une formulation de peinture réactive.
  5. Procédé selon l'une des revendications précédentes caractérisé en ce que le procédé présente au moins après l'étape a) et avant l'étape b) l'étape ultérieure suivante :
    a") mélange d'au moins un pigment à au moins une formulation de peinture réactive.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que, dans l'étape b), l'application d'au moins une formulation réactive de peinture avant l'utilisation d'au moins une réaction de réticulation est effectuée à au moins un endroit de la surface du substrat à l'aide d'un pistolet projecteur manuel.
EP99121912A 1998-11-05 1999-11-05 Procédé et appareil pour faire des revêtements réticulés Expired - Lifetime EP1002587B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19851139A DE19851139A1 (de) 1998-11-05 1998-11-05 Verfahren und Vorrichtung zur Herstellung von gehärteten Lackschichten
DE19851139 1998-11-05

Publications (3)

Publication Number Publication Date
EP1002587A2 EP1002587A2 (fr) 2000-05-24
EP1002587A3 EP1002587A3 (fr) 2003-12-03
EP1002587B1 true EP1002587B1 (fr) 2005-11-09

Family

ID=7886867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99121912A Expired - Lifetime EP1002587B1 (fr) 1998-11-05 1999-11-05 Procédé et appareil pour faire des revêtements réticulés

Country Status (8)

Country Link
US (2) US6344244B1 (fr)
EP (1) EP1002587B1 (fr)
JP (1) JP2000185257A (fr)
CN (1) CN1258573A (fr)
AT (1) ATE309054T1 (fr)
BR (1) BR9905157A (fr)
DE (2) DE19851139A1 (fr)
ES (1) ES2251812T3 (fr)

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DE10023353A1 (de) 2000-05-12 2001-11-29 Osram Opto Semiconductors Gmbh Optoelektronisches Bauelement und Verfahren zur Herstellung
US8048605B2 (en) * 2001-03-16 2011-11-01 Datalase Ltd Laser-markable compositions
DK1368200T4 (da) 2001-03-16 2011-10-10 Datalase Ltd Lasermærkningssammensætninger og laserafbildningsfremgangsmåde
US20060108450A1 (en) * 2003-02-06 2006-05-25 Akzo Nobel Coating International B.V. Spray gun and process for application of actinic radiation-curable coating
UA92457C2 (ru) * 2004-03-11 2010-11-10 Акцо Нобель Коатингс Интернешнл Б.В. Способ удаления, по крайней мере, одного поврежденного участка при изготовлении изделий, содержащих элементы из дерева
EP1789188A2 (fr) * 2004-07-21 2007-05-30 CIBA SPECIALTY CHEMICALS HOLDING INC. Patent Departement Procede de photoactivation et utilisation d'un catalyseur par une procédure inversé à deux étapes
DE102004045950A1 (de) 2004-09-22 2006-03-30 Osram Opto Semiconductors Gmbh Gehäuse für ein optoelektronisches Bauelement, optoelektronisches Bauelement und Verfahren zur Herstellung eines optoelektronischen Bauelements
US8197911B2 (en) * 2007-06-08 2012-06-12 Toyota Motor Engineering & Manufacturing North America, Inc. Method of applying polymer coating to a substrate
KR100845939B1 (ko) 2007-07-18 2008-07-11 제일모직주식회사 컬러필터 보호막용 일액형 열경화성 수지 조성물 및 이를이용한 컬러필터
US9451929B2 (en) * 2008-04-17 2016-09-27 Boston Scientific Scimed, Inc. Degassing intravascular ultrasound imaging systems with sealed catheters filled with an acoustically-favorable medium and methods of making and using
DE102009015195A1 (de) 2009-03-31 2010-10-07 Matthias Koch Strahlungstrockner, insbesondere UV-Trockner, sowie Strahlungstrocknermodul, insbesondere UV-Trocknermodul, enthaltend diesen Strahlungstrockner
US8519018B2 (en) * 2009-10-21 2013-08-27 Innovative Bottles, Llc Biodegradable material and container for fluids
US9527619B2 (en) 2009-10-21 2016-12-27 Innovative Bottles, Inc. Biodegradable pharmacy container and safety cap
DE102009052656A1 (de) * 2009-11-11 2011-05-12 Dürr Systems GmbH Applikationsvorrichtung zum Applizieren und Bestrahlen eines durch Strahlung härtbaren Beschichtungsmittels
US9339832B2 (en) 2012-03-22 2016-05-17 Basf Se Spraygun for producing cured coating films and methods of use thereof
JP2015512331A (ja) 2012-03-22 2015-04-27 ビーエイエスエフ・ソシエタス・エウロパエアＢａｓｆ Ｓｅ 硬化塗膜の製造方法及び製造装置

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Also Published As

Publication number Publication date
EP1002587A3 (fr) 2003-12-03
DE19851139A1 (de) 2000-05-11
US6344244B1 (en) 2002-02-05
ES2251812T3 (es) 2006-05-01
DE59912761D1 (de) 2005-12-15
BR9905157A (pt) 2000-09-12
CN1258573A (zh) 2000-07-05
EP1002587A2 (fr) 2000-05-24
US20020015799A1 (en) 2002-02-07
US6736898B2 (en) 2004-05-18
JP2000185257A (ja) 2000-07-04
ATE309054T1 (de) 2005-11-15

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