EP2291465A1 - Component with a self-healing surface layer, self-healing enamel or coating powder with self-healing characteristics - Google Patents

Component with a self-healing surface layer, self-healing enamel or coating powder with self-healing characteristics

Info

Publication number
EP2291465A1
EP2291465A1 EP09769225A EP09769225A EP2291465A1 EP 2291465 A1 EP2291465 A1 EP 2291465A1 EP 09769225 A EP09769225 A EP 09769225A EP 09769225 A EP09769225 A EP 09769225A EP 2291465 A1 EP2291465 A1 EP 2291465A1
Authority
EP
European Patent Office
Prior art keywords
self
particles
healing
substance
case
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09769225A
Other languages
German (de)
French (fr)
Inventor
Christian Doye
Oliver Hofacker
Jens Dahl Jensen
Ursus KRÜGER
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2291465A1 publication Critical patent/EP2291465A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/03—Powdery paints
    • C09D5/033—Powdery paints characterised by the additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
    • B29C73/16—Auto-repairing or self-sealing arrangements or agents
    • B29C73/22—Auto-repairing or self-sealing arrangements or agents the article containing elements including a sealing composition, e.g. powder being liberated when the article is damaged
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/10—Encapsulated ingredients
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249994—Composite having a component wherein a constituent is liquid or is contained within preformed walls [e.g., impregnant-filled, previously void containing component, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]

Definitions

  • the invention relates to a component having a self-healing surface layer, in the interior of which a reactive substance is dispersed whose chemical composition corresponds to a precursor of the material of the surface layer, this precursor spontaneously being exposed to the surface layer material in the event of exposure by damage to the surface is convertible. Furthermore, the invention relates to a self-healing lacquer, comprising a solvent and a layer material. In the paint, a reactive substance is dispersed, whose chemical composition corresponds to a precursor of the coating material, and this precursor is spontaneously convertible in the case of exposure, in the material of the coating material. Finally, the invention also relates to a coating powder which contains particles of a layer material. Also in the powder, a reactive substance is dispersed whose chemical composition corresponds to a precursor of the coating material, which precursor is spontaneously converted into the material of the coating material in the case of exposure.
  • the spontaneous conversion of precursors of a coating material into the coating material even under certain conditions are used according to the prior art to ensure self-healing properties of layers or layer materials.
  • a self-healing layer or the coating material (lacquer) used for this purpose can be found, for example, in EP 355 028 A1.
  • This is a coating of roof tiles whose life duration should extend under weather conditions.
  • a lower lacquer layer of the Dachstein contains an aromatic ketone, which on UV exposure or under the influence of sunlight causes the crosslinking of lower layers of lacquer and thus causes the healing of mechanical defects through the spontaneous formation of new chemical bonds.
  • the self-healing process is not by a foreign action of a control process - for example, after control by a human - in motion, but in the vicinity of the site of the surface layer - for example, atmospheric weather conditions - automatically grounded the properties of the surface layer and the environmental conditions is set in motion.
  • the control of the self-healing process is preferably taken over by a UV exposure (solar radiation), wherein the dosage of the UV exposure can not be influenced, but rather depends on the weather conditions in the field of use. For example, sunshine in Mediterranean countries is on average higher and rainfall lower than, for example, in the Nordic countries. Therefore, setting the parameters for self-curing of the paint poses certain problems.
  • the object of the invention is therefore to provide a layer system with self-healing properties or components for the production of such a layer, which on the one hand ensure a high resistance of the layer (for example scratch resistance) and on the other hand provide a precisely adjustable spontaneous self-healing effect ,
  • the reactive substance contained in the layer material forms the core of coated particles, wherein the shell consists of an oxidizable substance.
  • the reactive substance responsible for the self-healing in a so-called core-shell structure, so that the reactive substance which makes the material available for a self-healing reaction remains protected until its Use becomes necessary.
  • the shell of the oxidizable substance provides this protection as long as the coated particles are completely enclosed in the layer. This is achieved in that the layer for the coated particles provides oxidation protection.
  • the sheathed particle is exposed, inter alia, the atmospheric oxygen. Under the influence of atmospheric conditions (sunlight, heat) Then, an oxidation of the oxidizable substance of the shell instead, whereby this is destroyed and the reactive substance is released.
  • This can for example consist of liquid paint, which has the composition of the layer and, for example, hardens under the environmental conditions (sunlight, heat). In this way, the injury site of the layer can be at least partially filled and in this way further protection of the component can be ensured.
  • the following special embodiments of the invention relate equally to the component according to the invention, the self-healing lacquer according to the invention and the coating powder according to the invention.
  • a photoactivatable or a thermally activatable catalytic material to be attached to the surface of the shell of the particle, which assists in the oxidation of the oxidizable substance of the shell in the case of activation.
  • advantageous self-healing layer systems are used, where the sunlight for a sufficiently rapid oxidation of the oxidizable shell of the coated particles would not be sufficient and therefore damage to the coated component would not be completely ruled out.
  • the catalytic material accelerates the oxidation of the oxidizable substance, so that it comes advantageous to quickly heal.
  • photo- and / or thermally activated substances z.
  • titanium oxide zinc oxide or indium zinc oxide in question. These materials have the property of initiating or accelerating the oxidation of the oxidizable substance by light or heat due to their catalytic effect.
  • the catalytically active particles, in particular titanium oxide generate oxygen and hydroxide radicals as a result of the atmospheric moisture, which accelerate the oxidation. tion of the reactive substance of the shell of the particles.
  • the coats of the particles can also be destroyed mechanically, which has the additional advantage that the self-healing process is instantly initiated so that, in the event of severe layer damage, the maximum potential of the self-healing property is also available can be made.
  • a photoactivatable or a thermally activated catalytic material is incorporated in the core of the particles.
  • the oxidation of the oxidizable substance of the shell is supported in the manner already described.
  • the reactive substance and the oxidizable substance of the shell in this case must be transparent to electromagnetic radiation of the excitation wavelengths of the photoactivatable material. For only in this way can the photoactivatable catalytic material become active in the still closed state of the coated particles and thus support the oxidation of the shell.
  • a further alternative envisages that catalyst particles of the photoactivatable or thermally activated material are dispersed in the product. These take over in the case of activation by violation of the layer, the support of the oxidation of the oxidizable substance of the shell. For this it is necessary that a uniform distribution of the coated particles and the catalyst particles is present in the layer. This is the only way to ensure that local layer damage exposes both jacketed particles and catalyst particles, thus allowing the catalyst particles to take over their function. Furthermore, it is advantageously possible that the reactive substance consists of two components. This means that both sheathed particles of one component and annealed particles of the other component are available in the layer.
  • the components are mixed at the site of injury.
  • the components can be selected so that by mixing the layer material by a suitable reaction.
  • This variant of the invention has the advantage that the formation of the layer material can take place independently of an external energy (sunlight, heat) and in this way a particularly rapid annealing is possible lent.
  • more component polyurethane lacquer systems can be used.
  • the two components are each contained in different particles, wherein the particles are present mixed in the layer or the layer material. It is also conceivable that the two components are mixed in each coated particle. Here, however, only material mixtures can be used that do not react without supplying an activation energy. The shell of the particles then prevents this mixture from reacting until, due to a breach of the layer, destruction of this shell and the possibility of introducing an activation energy occurs.
  • LBL-Technology® which is provided by the company Capsulation Nanosience AG.
  • LBL-Technology® a procedure known as LBL-Technology®, which is provided by the company Capsulation Nanosience AG.
  • LBL layer-by-layer
  • the shell materials may, for example, be biocompatible substances which are oxidatively destroyed in air, oxygen, in particular in the presence of suitable catalytic materials, such as titanium oxide.
  • FIG. 4 shows an embodiment of the powder according to the invention
  • FIG. 5 to 8 an embodiment of the component according to the invention in different phases of self-healing.
  • a self-healing lacquer 11 according to FIG. 1 has a dispersion of particles 12 coated on the one hand and reactive particles 13 on the one hand. These are evenly distributed in the paint, resulting in a mixture of said particles.
  • the coated particles have, on the one hand, a jacket 14 of an oxidizable substance and a core 15 of a reactive substance.
  • the oxidizable substance and the reactive substance have the properties already described, which come into play if the later cured lacquer is injured.
  • the coating 11 according to FIG. 2 contains a dispersion exclusively of coated particles 12.
  • a reactive particle 13a is additionally provided.
  • a plurality of reactive particles, in particular nanoparticles may also be provided. These in turn can form a dispersion in the core 15.
  • the material of the core and the cladding are transparent to light having an excitation wavelength for the catalytic material of the reactive particles.
  • coated particles 12a, 12b are used in the lacquer 11, in which the reactive substance 16 is distributed as islands on the casing 14. Sheathed particles 12a, 12b of two types are present, these differing in that different components of the lacquer are used as the core
  • FIG. 4 schematically shows a powder 17 which is suitable for producing a layer, for example by powder coating. This has sheathed particles 12a, 12b whose function is analogous to FIG. The two components of the different cores 15 of the jacketed
  • Particles 12a, 12b provide a two-component system which produces a layer material at least similar to the remaining powder particles 18 which is suitable for self-curing the powder-coated layer.
  • the catalytic material is provided only on one kind of the sheathed particles 12b. This simplifies the production of the sheathed particles 12a, wherein the catalytic material 16 on the sheathed particles 12b is also used for the oxidation of the shells 14 of the particles 12a.
  • the embodiments of Figures 1 to 4 can of course be used in other combinations, which are not shown.
  • FIG. 5 shows the partial section through a component 19 with a self-healing surface layer 20.
  • the surface layer 20 consists of the lacquer 11, which has cured and in which the coated particles 12 are dispersed.
  • the paint 11 has been damaged by a crack 21, wherein one of the coated particles 12 has been exposed.
  • Its shell 14, which now forms part of the crack surface carries islands of the catalytic substance 16, which, as shown in FIG. 6, lead to oxidation under the action of UV radiation and consequently to the destruction of the shell 14.
  • the reactive substance 15 can escape from the core of the coated particle 12 and flows into the crack 21.
  • the reactive substance 15 (liquid paint) is cured under the action of further UV radiation. It can be seen in FIG. 8 that, as a result, the crack 21 according to FIG. 5 is largely closed again. It can also be seen that the self-healing can not be completed due to lack of mass, but it is ensured that the surface 22 of the component 19 is protected again. Possible defects in the layer 20 are voids 23 or residual recesses 24.

Abstract

The invention relates to a component (19) with a self-healing surface layer (20) or a self-healing enamel (21) or a coating powder. According to the invention, the self-healing is guaranteed through a reactive substance (15) that is encased inside of sheathed particles (12). Damage (21) to the enamel layer leads to the destruction of the sheathing (14), preferably under the influence of a catalytic material (16), so that the encased fluid enamel (15) can escape. Under the effect of UV light, the fluid enamel cures and closes the resultant crack (21).

Description

Beschreibungdescription
Bauteil mit einer selbstheilenden Oberflächenschicht, selbstheilender Lack bzw. Beschichtungspulver mit selbstheilenden EigenschaftenComponent with a self-healing surface layer, self-healing lacquer or coating powder with self-healing properties
Die Erfindung betrifft ein Bauteil mit einer selbstheilenden Oberflächenschicht, in deren Innerem eine reaktive Substanz dispergiert ist, deren chemische Zusammensetzung einer Vor- stufe des Materials der Oberflächenschicht entspricht, wobei diese Vorstufe im Falle eines Freiliegens durch eine Beschädigung der Oberfläche spontan in das Material der Oberflächenschicht umwandelbar ist. Weiterhin betrifft die Erfindung einen selbstheilenden Lack, aufweisend ein Lösungsmittel und einen Schichtwerkstoff. In den Lack ist eine reaktive Substanz dispergiert, deren chemische Zusammensetzung einer Vorstufe des Schichtwerkstoffes entspricht, wobei auch diese Vorstufe im Falle eines Freiliegens spontan in das Material des Schichtwerkstoffes umwandelbar ist. Zuletzt betrifft die Erfindung auch ein Beschichtungspulver, welches Partikel aus einem Schichtwerkstoff enthält. Auch in das Pulver ist eine reaktive Substanz dispergiert, deren chemische Zusammensetzung einer Vorstufe des Schichtwerkstoffes entspricht, wobei diese Vorstufe im Falle eines Freiliegens spontan in das Ma- terial des Schichtwerkstoffes umgewandelt wird.The invention relates to a component having a self-healing surface layer, in the interior of which a reactive substance is dispersed whose chemical composition corresponds to a precursor of the material of the surface layer, this precursor spontaneously being exposed to the surface layer material in the event of exposure by damage to the surface is convertible. Furthermore, the invention relates to a self-healing lacquer, comprising a solvent and a layer material. In the paint, a reactive substance is dispersed, whose chemical composition corresponds to a precursor of the coating material, and this precursor is spontaneously convertible in the case of exposure, in the material of the coating material. Finally, the invention also relates to a coating powder which contains particles of a layer material. Also in the powder, a reactive substance is dispersed whose chemical composition corresponds to a precursor of the coating material, which precursor is spontaneously converted into the material of the coating material in the case of exposure.
Die spontane Umwandlung von Vorstufen eines Schichtwerkstoffes in den Schichtwerkstoff selbst unter bestimmten Bedingungen werden gemäß dem Stand der Technik dazu benutzt, um selbstheilende Eigenschaften von Schichten bzw. Schichtwerkstoffen zu gewährleisten. Eine solche selbstheilende Schicht bzw. das hierfür verwendete Schichtmaterial (Lack) ist beispielsweise der EP 355 028 Al zu entnehmen. Hierbei handelt es sich um eine Beschichtung von Dachsteinen, deren Lebens- dauer sich unter Witterungsbedingungen verlängern soll. Dafür enthält eine untere Lackschicht des Dachsteins ein aromatisches Keton, welches bei UV-Belichtung oder unter dem Ein- fluss von Sonnenlicht die Vernetzung unterer Lackschichten bewirkt und somit eine Ausheilung mechanischer Defekte durch die spontane Neubildung chemischer Bindungen bewirkt. Unter spontan im Zusammenhang mit dieser Erfindung soll verstanden werden, dass der Selbstheilungsprozess nicht durch ein fremdes Einwirken eines Steuerungsprozesses - beispielsweise nach Kontrolle durch einen Menschen - in Gang gesetzt wird, sondern in der Umgebung des Einsatzortes der Oberflächenschicht - beispielsweise atmosphärischen Witterungsbedingungen - automatisch auf Grund der Eigenschaften der Oberflächenschicht und den Umgebungsbedingungen in Gang gesetzt wird. Die Steue- rung des Selbstheilungsprozesses wird vorzugsweise durch eine UV-Belichtung (Sonneneinstrahlung) übernommen, wobei die Dosierung der UV-Belichtung nicht beeinflussbar ist, sondern vielmehr von den Witterungsbedingungen im Einsatzgebiet abhängt. So ist die Sonneneinstrahlung in mediterranen Ländern beispielsweise im Schnitt höher und die Niederschläge geringer als beispielsweise in den nordischen Ländern. Daher wirft die Einstellung der Parameter zur Selbstausheilung des Lackes gewisse Probleme auf.The spontaneous conversion of precursors of a coating material into the coating material even under certain conditions are used according to the prior art to ensure self-healing properties of layers or layer materials. Such a self-healing layer or the coating material (lacquer) used for this purpose can be found, for example, in EP 355 028 A1. This is a coating of roof tiles whose life duration should extend under weather conditions. For this purpose, a lower lacquer layer of the Dachstein contains an aromatic ketone, which on UV exposure or under the influence of sunlight causes the crosslinking of lower layers of lacquer and thus causes the healing of mechanical defects through the spontaneous formation of new chemical bonds. Under spontaneous in the context of this invention should be understood that the self-healing process is not by a foreign action of a control process - for example, after control by a human - in motion, but in the vicinity of the site of the surface layer - for example, atmospheric weather conditions - automatically grounded the properties of the surface layer and the environmental conditions is set in motion. The control of the self-healing process is preferably taken over by a UV exposure (solar radiation), wherein the dosage of the UV exposure can not be influenced, but rather depends on the weather conditions in the field of use. For example, sunshine in Mediterranean countries is on average higher and rainfall lower than, for example, in the Nordic countries. Therefore, setting the parameters for self-curing of the paint poses certain problems.
Andere selbstheilende Lacksysteme nach dem Stand der Technik verzichten daher auf aktive Komponenten in der Beschichtung, sondern nutzen allein eine physikalische Restfließfähigkeit einer Beschichtung nach dem Aushärten, um beispielsweise entstandene Kratzer wieder auszuheilen. Solche Lacke basieren u. a. in der äußersten Schicht auf einer Polyurethanmischung. Wird ein solcher sogenannter PUR-Lack erwärmt, z. B. durch Sonneneinstrahlung, fließen die Lackschichten, wodurch Verletzungen derselben niveliert werden. Die hierfür notwendige, vergleichsweise hohe Fließfähigkeit der Beschichtung setzt jedoch eine niedrige Vernetzungsdichte voraus. Dies führt bei manchen Anwendungen zu unzureichenden mechanischen Beständigkeiten, die z. B. die Anforderungen für Automobilanwendungen hinsichtlich Kratzbeständigkeit oder Chemikalienresistenz nicht erfüllen.Other self-healing lacquer systems according to the prior art therefore do without active components in the coating, but use only a physical residual flowability of a coating after curing to heal, for example, resulting scratches again. Such paints are based inter alia in the outermost layer on a polyurethane mixture. If such a so-called PUR varnish is heated, for. B. by sunlight, flow the paint layers, which violations of the same are leveled. The necessary, relatively high flowability of the coating sets but preceded by a low crosslink density. This leads in some applications to insufficient mechanical resistance, the z. B. do not meet the requirements for automotive applications in terms of scratch resistance or chemical resistance.
Die Aufgabe der Erfindung liegt daher in der Bereitstellung eines Schichtsystems mit selbst ausheilenden Eigenschaften bzw. Komponenten zur Herstellung einer solchen Schicht, wel- che einerseits eine hohe Beanspruchbarkeit der Schicht gewährleisten (beispielsweise Kratzfestigkeit) und andererseits einen präzise einzustellenden Effekt der spontanen Selbstausheilung zur Verfügung stellen.The object of the invention is therefore to provide a layer system with self-healing properties or components for the production of such a layer, which on the one hand ensure a high resistance of the layer (for example scratch resistance) and on the other hand provide a precisely adjustable spontaneous self-healing effect ,
Diese Aufgabe wird mit dem eingangs angeführten Bauteil bzw. selbstheilenden Lack bzw. Beschichtungspulver dadurch gelöst, dass die in dem Schichtwerkstoff enthaltene reaktive Substanz den Kern von gemantelten Partikeln bildet, wobei der Mantel aus einer oxidierbaren Substanz besteht. Erfindungsgemäß wird also vorgeschlagen, die für die Selbstheilung verantwortliche reaktive Substanz in einer sogenannten Core-Shell-Struktur zur Verfügung zu stellen, so dass die reaktive Substanz, die das Material für eine die Selbstausheilung bewirkende Reaktion zur Verfügung stellt, solange geschützt bleibt, bis deren Einsatz notwendig wird. Die Ummantelung aus der oxidierbaren Substanz gewährt diesen Schutz solange, wie die gemantelten Partikel in der Schicht vollständig eingeschlossen sind. Dies wird dadurch erreicht, dass die Schicht für die gemantelten Partikel einen Oxidationsschutz darstellt.This object is achieved with the above-mentioned component or self-healing lacquer or coating powder in that the reactive substance contained in the layer material forms the core of coated particles, wherein the shell consists of an oxidizable substance. According to the invention, it is therefore proposed to provide the reactive substance responsible for the self-healing in a so-called core-shell structure, so that the reactive substance which makes the material available for a self-healing reaction remains protected until its Use becomes necessary. The shell of the oxidizable substance provides this protection as long as the coated particles are completely enclosed in the layer. This is achieved in that the layer for the coated particles provides oxidation protection.
Sobald jedoch eine Verletzung der Schicht erfolgt, und ein gemanteltes Partikel freigelegt wird, so wird das gemantelte Partikel u. a. dem Luftsauerstoff ausgesetzt. Unter der Einwirkung der atmosphärischen Bedingungen (Sonnenlicht, Wärme) findet dann eine Oxidation der oxidierbaren Substanz des Mantels statt, wodurch dieser zerstört wird und die reaktive Substanz freigesetzt wird. Diese kann beispielsweise aus Flüssiglack bestehen, welcher die Zusammensetzung der Schicht aufweist und unter den Umweltbedingungen (Sonnenlicht, Wärme) beispielsweise aushärtet. Auf diese Weise kann die Verletzungsstelle der Schicht zumindest teilweise ausgefüllt werden und auf diesem Wege ein Schutz des Bauteils weiter gewährleistet werden.However, as soon as there is a violation of the layer, and a sheathed particle is exposed, the sheathed particle is exposed, inter alia, the atmospheric oxygen. Under the influence of atmospheric conditions (sunlight, heat) Then, an oxidation of the oxidizable substance of the shell instead, whereby this is destroyed and the reactive substance is released. This can for example consist of liquid paint, which has the composition of the layer and, for example, hardens under the environmental conditions (sunlight, heat). In this way, the injury site of the layer can be at least partially filled and in this way further protection of the component can be ensured.
Die folgenden besonderen Ausgestaltungen der Erfindung beziehen sich gleichermaßen auf das erfindungsgemäße Bauteil, den erfindungsgemäßen selbstheilenden Lack und das erfindungsgemäße Beschichtungspulver . Beispielsweise ist es vorteilhaft möglich, dass an der Oberfläche des Mantels der Partikel ein fotoaktivierbares oder ein thermoaktivierbares katalytisches Material angelagert ist, das im Falle einer Aktivierung die Oxidation der oxidierbaren Substanz des Mantels unterstützt. Hierdurch können beispielsweise in nördlichen Regionen der Erde vorteilhaft selbstheilende Schichtsysteme eingesetzt werden, wo die Sonneneinstrahlung für eine genügend schnelle Oxidation des oxidierbaren Mantels der gemantelten Partikel nicht ausreichen würde und deshalb eine Beschädigung des beschichteten Bauteils nicht vollständig auszuschließen wäre. Das katalytische Material beschleunigt die Oxidation der oxidierbaren Substanz, so dass es vorteilhaft schnell zu einer Ausheilung kommt. Als foto- und/oder thermoaktivierbare Substanzen kommen z. B. Titanoxid, Zinkoxid oder Indiumzinkoxid in Frage. Diese Materialien besitzen die Eigenschaft, durch Licht bzw. Wärme die Oxidation der oxidierbaren Substanz aufgrund ihrer katalytischen Wirkung einzuleiten bzw. zu beschleunigen. Die katalytisch aktiven Partikel, insbesondere Titanoxid, erzeugen durch die Luftfeuchtigkeit Sauerstoff- und Hydroxid-Radikale, die zu einer Beschleunigung der Oxida- tion der reaktiven Substanz des Mantels der Partikel führen. Selbstverständlich können durch schwerwiegendere Verletzungen der Schicht die Mäntel der Partikel auch mechanisch zerstört werden, was den zusätzlichen Vorteil hat, dass der selbsthei- lende Prozess sofort in Gang gesetzt wird, so dass bei schwerwiegenden Verletzungen der Schicht auch das maximale Potential der selbstausheilenden Eigenschaft zur Verfügung gestellt werden kann.The following special embodiments of the invention relate equally to the component according to the invention, the self-healing lacquer according to the invention and the coating powder according to the invention. For example, it is advantageously possible for a photoactivatable or a thermally activatable catalytic material to be attached to the surface of the shell of the particle, which assists in the oxidation of the oxidizable substance of the shell in the case of activation. As a result, for example, in northern regions of the earth advantageous self-healing layer systems are used, where the sunlight for a sufficiently rapid oxidation of the oxidizable shell of the coated particles would not be sufficient and therefore damage to the coated component would not be completely ruled out. The catalytic material accelerates the oxidation of the oxidizable substance, so that it comes advantageous to quickly heal. As photo- and / or thermally activated substances z. As titanium oxide, zinc oxide or indium zinc oxide in question. These materials have the property of initiating or accelerating the oxidation of the oxidizable substance by light or heat due to their catalytic effect. The catalytically active particles, in particular titanium oxide, generate oxygen and hydroxide radicals as a result of the atmospheric moisture, which accelerate the oxidation. tion of the reactive substance of the shell of the particles. Of course, as a result of more severe layer damage, the coats of the particles can also be destroyed mechanically, which has the additional advantage that the self-healing process is instantly initiated so that, in the event of severe layer damage, the maximum potential of the self-healing property is also available can be made.
Alternativ ist es auch möglich, dass im Kern der Partikel ein fotoaktivierbares oder ein thermoaktivierbares katalytisches Material eingelagert ist. Im Falle einer Aktivierung wird die Oxidation der oxidierbaren Substanz des Mantels in der bereits beschriebenen Weise unterstützt. Im Falle der Verwen- düng des fotoaktivierbaren katalytischen Materials ist zu bemerken, dass die reaktive Substanz und die oxidierbare Substanz des Mantels in diesem Falle für elektromagnetische Strahlung der Anregungswellenlängen des fotoaktivierbaren Materials transparent sein muss. Denn nur so kann das fotoakti- vierbare katalytische Material im noch geschlossenen Zustand der gemantelten Partikel aktiv werden und so die Oxidation der Hülle unterstützen.Alternatively, it is also possible that a photoactivatable or a thermally activated catalytic material is incorporated in the core of the particles. In the case of activation, the oxidation of the oxidizable substance of the shell is supported in the manner already described. In the case of the use of the photoactivatable catalytic material, it should be noted that the reactive substance and the oxidizable substance of the shell in this case must be transparent to electromagnetic radiation of the excitation wavelengths of the photoactivatable material. For only in this way can the photoactivatable catalytic material become active in the still closed state of the coated particles and thus support the oxidation of the shell.
Eine weitere Alternative sieht vor, dass Katalysatorpartikel aus dem fotoaktivierbaren oder thermoaktivierbaren Material in dem Erzeugnis dispergiert sind. Diese übernehmen im Falle einer Aktivierung durch Verletzung der Schicht die Unterstützung der Oxidation der oxidierbaren Substanz des Mantels. Hierzu ist es notwendig, dass eine gleichmäßige Verteilung der gemantelten Partikel und der Katalysatorpartikel in der Schicht vorliegt. Nur so ist gewährleistet, dass eine lokale Verletzung der Schicht sowohl gemantelte Partikel als auch Katalysatorpartikel freilegt und so die Katalysatorpartikel ihre Funktion übernehmen können. Weiterhin ist es vorteilhaft möglich, dass die reaktive Substanz aus zwei Komponenten besteht. Dies bedeutet, dass sowohl gemantelte Partikel der einen Komponente als auch geman- telte Partikel der anderen Komponente in der Schicht zur Verfügung stehen. Sobald durch eine Beschädigung der Schicht Partikel beider Komponenten geöffnet werden (d. h. oxidative Zerstörung des Mantels) , werden die Komponenten in der Verletzungsstelle gemischt. Die Komponenten können so ausgewählt werden, dass durch Mischung das Schichtmaterial durch eine geeignete Reaktion entsteht. Diese Variante der Erfindung hat den Vorteil, dass die Bildung des Schichtmaterials unabhängig von einer äußeren Energie (Sonnenlicht, Wärme) erfolgen kann und auf diesem Wege eine besonders schnelle Ausheilung mög- lieh ist. Zur Verwendung kommen können beispielsweise mehr Komponenten-Polyurethan-Lacksysteme .A further alternative envisages that catalyst particles of the photoactivatable or thermally activated material are dispersed in the product. These take over in the case of activation by violation of the layer, the support of the oxidation of the oxidizable substance of the shell. For this it is necessary that a uniform distribution of the coated particles and the catalyst particles is present in the layer. This is the only way to ensure that local layer damage exposes both jacketed particles and catalyst particles, thus allowing the catalyst particles to take over their function. Furthermore, it is advantageously possible that the reactive substance consists of two components. This means that both sheathed particles of one component and annealed particles of the other component are available in the layer. Once particles of both components are opened by damage to the layer (ie, oxidative destruction of the shell), the components are mixed at the site of injury. The components can be selected so that by mixing the layer material by a suitable reaction. This variant of the invention has the advantage that the formation of the layer material can take place independently of an external energy (sunlight, heat) and in this way a particularly rapid annealing is possible lent. For example, more component polyurethane lacquer systems can be used.
Allerdings ist es nicht unbedingt notwendig, dass die beiden Komponenten jeweils in unterschiedlichen Partikeln enthalten sind, wobei die Partikel in der Schicht oder dem Schichtwerkstoff gemischt vorliegen. Es ist auch denkbar, dass die beiden Komponenten gemischt in jedem gemantelten Partikel vorliegen. Hierbei können jedoch nur Materialmischungen verwendet werden, die nicht ohne Zufuhr einer Aktivierungsenergie reagieren. Der Mantel der Partikel bewahrt diese Mischung dann vor einer Reaktion, bis es aufgrund einer Verletzung der Schicht zu einer Zerstörung dieses Mantels und der Möglichkeit des Eintrags einer Aktivierungsenergie kommt.However, it is not absolutely necessary that the two components are each contained in different particles, wherein the particles are present mixed in the layer or the layer material. It is also conceivable that the two components are mixed in each coated particle. Here, however, only material mixtures can be used that do not react without supplying an activation energy. The shell of the particles then prevents this mixture from reacting until, due to a breach of the layer, destruction of this shell and the possibility of introducing an activation energy occurs.
Zur Herstellung der gemantelten Partikel steht beispielsweise eine als LBL-Technology® bezeichnete Verfahrensweise zur Verfügung, welche durch die Firma Capsulation Nanosience AG zur Verfügung gestellt wird. Bei dieser Technologie können durch einen schichtweisen Aufbau (layer by layer, LBL) maßgeschnei- derte Partikel mit Kern und Hülle zur Verfügung gestellt werden. Die Hüllmaterialien können beispielsweise biokompatible Substanzen sein, welche an Luft, Sauerstoff, insbesondere unter Anwesenheit geeigneter katalytischer Materialien, wie Ti- tanoxid, oxidativ zerstört werden.For the production of the coated particles, for example, there is a procedure known as LBL-Technology®, which is provided by the company Capsulation Nanosience AG. With this technology, a layer-by-layer (LBL) structure can be used to tailor derten particles are provided with core and shell. The shell materials may, for example, be biocompatible substances which are oxidatively destroyed in air, oxygen, in particular in the presence of suitable catalytic materials, such as titanium oxide.
Weitere Einzelheiten der Erfindung werden nachfolgend anhand der Zeichnung erläutert. Gleiche oder sich entsprechende Zeichnungselemente sind jeweils mit den gleichen Bezugszei- chen versehen und werden nur insoweit mehrfach erläutert, wie sich Unterschiede zwischen den einzelnen Figuren ergeben. Es zeigenFurther details of the invention are explained below with reference to the drawing. Identical or corresponding drawing elements are each provided with the same reference numerals and will only be explained several times to the extent that differences arise between the individual figures. Show it
Figur 1 bis 3 Ausführungsbeispiele des erfindungsgemä- ßen Lackes,1 to 3 exemplary embodiments of the paint according to the invention,
Figur 4 ein Ausführungsbeispiel des erfindungsgemäßen Pulvers undFigure 4 shows an embodiment of the powder according to the invention and
Figur 5 bis 8 ein Ausführungsbeispiel des erfindungsgemäßen Bauteils in unterschiedlichen Phasen der Selbstausheilung.Figure 5 to 8 an embodiment of the component according to the invention in different phases of self-healing.
Ein selbstausheilender Lack 11 gemäß Figur 1 weist eine Dis- persion von einerseits gemantelten Partikeln 12 und reaktiven Partikeln 13 auf. Diese liegen in dem Lack gleichmäßig verteilt vor, so dass sich eine Mischung der genannten Partikel ergibt. Die gemantelten Partikel weisen einerseits einen Mantel 14 aus einer oxidierbaren Substanz und einen Kern 15 aus einer reaktiven Substanz auf. Die oxidierbare Substanz und die reaktive Substanz haben die bereits beschriebenen Eigenschaften, die zum Tragen kommen, sofern der später ausgehärtete Lack verletzt wird. Bei dem Lack 11 gemäß Figur 2 ist eine Dispersion ausschließlich aus gemantelten Partikeln 12 enthalten. Im Kern 15 dieser Partikel ist zusätzlich ein reaktiver Partikel 13a vorgesehen. Alternativ (nicht dargestellt) können auch mehrere re- aktive Partikel, insbesondere Nanopartikel, vorgesehen sein. Diese können wiederum eine Dispersion im Kern 15 bilden. Das Material des Kerns und des Mantels sind transparent für Licht mit einer Anregungswellenlänge für das katalytische Material der reaktiven Partikel.A self-healing lacquer 11 according to FIG. 1 has a dispersion of particles 12 coated on the one hand and reactive particles 13 on the one hand. These are evenly distributed in the paint, resulting in a mixture of said particles. The coated particles have, on the one hand, a jacket 14 of an oxidizable substance and a core 15 of a reactive substance. The oxidizable substance and the reactive substance have the properties already described, which come into play if the later cured lacquer is injured. The coating 11 according to FIG. 2 contains a dispersion exclusively of coated particles 12. In the core 15 of these particles, a reactive particle 13a is additionally provided. Alternatively (not shown), a plurality of reactive particles, in particular nanoparticles, may also be provided. These in turn can form a dispersion in the core 15. The material of the core and the cladding are transparent to light having an excitation wavelength for the catalytic material of the reactive particles.
In Figur 3 werden in dem Lack 11 gemantelte Partikel 12a, 12b verwendet, bei denen die reaktive Substanz 16 als Inseln auf dem Mantel 14 verteilt ist. Es liegen gemantelte Partikel 12a, 12b zweier Arten vor, wobei diese sich darin unterschei- den, dass verschiedenartige Komponenten des Lackes als KernIn FIG. 3, coated particles 12a, 12b are used in the lacquer 11, in which the reactive substance 16 is distributed as islands on the casing 14. Sheathed particles 12a, 12b of two types are present, these differing in that different components of the lacquer are used as the core
15 in den Mänteln 14 eingeschlossen ist. Bei Beschädigung der gemantelten Partikel werden diese Komponenten durchmischt, nachdem sie aus den Mänteln 14 ausgetreten sind und können zu dem Lack aushärten.15 is included in the coats 14. Upon damage of the jacketed particles, these components are mixed after they have exited the jackets 14 and can cure to the varnish.
In Figur 4 ist ein Pulver 17 schematisch dargestellt, welches zur Herstellung einer Schicht beispielsweise durch Pulverbeschichten geeignet ist. Dieses weist gemantelte Partikel 12a, 12b auf, deren Funktion analog zu Figur 3 ist. Die beiden Komponenten der unterschiedlichen Kerne 15 der gemanteltenFIG. 4 schematically shows a powder 17 which is suitable for producing a layer, for example by powder coating. This has sheathed particles 12a, 12b whose function is analogous to FIG. The two components of the different cores 15 of the jacketed
Partikel 12a, 12b stellen ein Zwei-Komponentensystem zur Verfügung, welches eine den restlichen Pulverteilchen 18 zumindest ähnliches Schichtmaterial erzeugt, welches zur Selbstausheilung der durch Pulverbeschichten hergestellten Schicht geeignet ist. Das katalytische Material ist nur auf einer Art der gemantelten Partikel 12b vorgesehen. Dies vereinfacht die Herstellung der gemantelten Partikel 12a, wobei das katalytische Material 16 auf den gemantelten Partikeln 12b auch zur Oxidation der Mäntel 14 der Partikel 12a zum Einsatz kommt. Die Ausführungsformen der Figuren 1 bis 4 können selbstverständlich auch in anderen Kombinationen zum Einsatz kommen, die nicht dargestellt sind.Particles 12a, 12b provide a two-component system which produces a layer material at least similar to the remaining powder particles 18 which is suitable for self-curing the powder-coated layer. The catalytic material is provided only on one kind of the sheathed particles 12b. This simplifies the production of the sheathed particles 12a, wherein the catalytic material 16 on the sheathed particles 12b is also used for the oxidation of the shells 14 of the particles 12a. The embodiments of Figures 1 to 4 can of course be used in other combinations, which are not shown.
In Figur 5 ist der Teilschnitt durch ein Bauteil 19 mit einer selbstausheilenden Oberflächenschicht 20 dargestellt. Die Oberflächenschicht 20 besteht aus dem Lack 11, der ausgehärtet ist und in dem die gemantelten Partikel 12 dispergiert sind. Der Lack 11 ist durch einen Riss 21 verletzt worden, wobei eines der gemantelten Partikel 12 freigelegt wurde. Dessen Hülle 14, welche nun einen Teil der Rissoberfläche bildet, trägt Inseln der katalytischen Substanz 16, die, wie Figur 6 zeigt, unter Einwirkung von UV-Strahlung zu einer Oxidation und daraus folgend zu einer Zerstörung des Mantels 14 führen. Hierdurch kann die reaktive Substanz 15 aus dem Kern des gemantelten Partikels 12 austreten und fließt in den Riss 21.FIG. 5 shows the partial section through a component 19 with a self-healing surface layer 20. The surface layer 20 consists of the lacquer 11, which has cured and in which the coated particles 12 are dispersed. The paint 11 has been damaged by a crack 21, wherein one of the coated particles 12 has been exposed. Its shell 14, which now forms part of the crack surface, carries islands of the catalytic substance 16, which, as shown in FIG. 6, lead to oxidation under the action of UV radiation and consequently to the destruction of the shell 14. As a result, the reactive substance 15 can escape from the core of the coated particle 12 and flows into the crack 21.
Wie Figur 7 zu entnehmen ist, wird unter Einwirkung weiterer UV-Strahlung die reaktive Substanz 15 (Flüssiglack) ausgehärtet. In Figur 8 ist zu erkennen, dass hierdurch der Riss 21 gemäß Figur 5 zum größten Teil wieder verschlossen ist. Es ist auch zu erkennen, dass die Selbstausheilung mangels Masse nicht vollständig erfolgen kann, wobei jedoch gewährleistet ist, dass die Oberfläche 22 des Bauteils 19 wieder geschützt ist. Als mögliche Fehlstellen in der Schicht 20 sind Lunker 23 oder Restvertiefungen 24 zu nennen. As can be seen from FIG. 7, the reactive substance 15 (liquid paint) is cured under the action of further UV radiation. It can be seen in FIG. 8 that, as a result, the crack 21 according to FIG. 5 is largely closed again. It can also be seen that the self-healing can not be completed due to lack of mass, but it is ensured that the surface 22 of the component 19 is protected again. Possible defects in the layer 20 are voids 23 or residual recesses 24.

Claims

Patentansprüche claims
1. Bauteil mit einer selbstheilenden Oberflächenschicht (20), in deren Innerem eine reaktive Substanz (15) dispergiert ist, deren chemische Zusammensetzung einer Vorstufe des Materials der Oberflächenschicht entspricht, wobei diese Vorstufe im Falle eines Freiliegens durch eine Beschädigung der Oberflächenschicht (20) spontan in das Material der Oberflächenschicht (20) umwandelbar ist d a d u r c h g e k e n n z e i c h n e t, dass die reaktive Substanz (15) den Kern von gemantelten Partikeln (12) bildet, wobei der Mantel (14) aus einer oxidier- baren Substanz besteht.1. component having a self-healing surface layer (20) inside which a reactive substance (15) is dispersed, whose chemical composition corresponds to a precursor of the material of the surface layer, said precursor spontaneously in case of exposure by damage to the surface layer (20) characterized in that the reactive substance (15) forms the core of coated particles (12), wherein the jacket (14) consists of an oxidizable substance.
2. Selbstheilender Lack, aufweisend ein Lösungsmittel und einen Schichtwerkstoff, wobei in den Lack eine reaktive Substanz (15) dispergiert ist, deren chemische Zusammensetzung einer Vorstufe des Schichtwerkstoffes entspricht, wobei diese Vorstufe im Falle eines Freiliegens spontan in das Material des Schichtwerkstoffes umwandelbar ist d a d u r c h g e k e n n z e i c h n e t, dass die reaktive Substanz (15) den Kern von gemantelten Partikeln (12) bildet, wobei der Mantel (14) aus einer oxidier- baren Substanz besteht.2. Self-healing lacquer, comprising a solvent and a coating material, wherein in the paint, a reactive substance (15) is dispersed, whose chemical composition corresponds to a precursor of the coating material, said precursor in the case of an exposed spontaneously convertible into the material of the coating material is characterized characterized in that the reactive substance (15) forms the core of coated particles (12), the jacket (14) consisting of an oxidizable substance.
3. Beschichtungspulver, aufweisend Partikel aus einem Schichtwerkstoff, wobei in dem Pulver eine reaktive Substanz (15) verteilt ist, deren chemische Zusammensetzung einer Vorstufe des Schichtwerkstoffes entspricht, wobei diese Vorstufe im Falle eines Freiliegens spontan in das Material des Schichtwerkstoffes umwandelbar ist d a d u r c h g e k e n n z e i c h n e t, dass die reaktive Substanz (15) den Kern von gemantelten Partikeln (12) bildet, wobei der Mantel (14) aus einer oxidier- baren Substanz besteht.3. Coating powder, comprising particles of a layer material, in which powder a reactive substance (15) is distributed, the chemical composition of which corresponds to a precursor of the coating material, this precursor being spontaneously convertible into the material of the coating material in the case of exposure, characterized in that the reactive substance (15) forms the core of coated particles (12), the jacket (14) consisting of an oxidizable substance.
4. Erzeugnis nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t, dass an der Oberfläche des Mantels (14) der Partikel ein pho- toaktivierbares oder ein thermoaktivierbares katalytisches Material (16) angelagert ist, das im Falle einer Aktivierung die Oxidation der oxidierbaren Substanz des Mantels (16) unterstützt .4. Product according to one of claims 1 to 3, characterized in that on the surface of the shell (14) of the particles, a photoactivatable or a thermally activated catalytic material (16) is attached, which in case of activation, the oxidation of the oxidizable substance of the Mantels (16) supported.
5. Erzeugnis nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t, dass im Kern der Partikel ein photoaktivierbares oder ein thermoaktivierbares katalytisches Material eingelagert ist, das im Falle einer Aktivierung die Oxidation der oxidierbaren Substanz des Mantels (14) unterstützt, wobei im Falle des photoaktivierbaren katalytischen Materials die reaktive Sub- stanz und die oxidierbare Substanz für elektromagnetische Strahlung der Anregungswellenlängen des photoaktivierbaren Materials transparent ist.5. Product according to one of claims 1 to 3, characterized in that in the core of the particles, a photoactivatable or a thermally activated catalytic material is incorporated, which in the case of activation, the oxidation of the oxidizable substance of the shell (14) supports, wherein in the case of the photoactivatable catalytic material, the reactive substance and the oxidizable substance for electromagnetic radiation of the excitation wavelengths of the photoactivatable material is transparent.
6. Erzeugnis nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t, dass Katalysatorpartikel (13) aus einem photoaktivierbaren oder ein thermoaktivierbaren Material in dem Erzeugnis dispergiert sind, die im Falle einer Aktivierung die Oxidation der oxidierbaren Substanz des Mantels (14) unterstützen.6. A product according to any one of claims 1 to 3, wherein catalyst particles (13) of a photoactivatable or thermoactivatable material are dispersed in the product which, in case of activation, promote oxidation of the oxidisable substance of the shell (14).
7. Erzeugnis nach einem der voranstehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, dass die reaktive Substanz aus zwei Komponenten besteht. 7. Product according to one of the preceding claims, characterized in that the reactive substance consists of two components.
8. Erzeugnis nach Anspruch 7, d a d u r c h g e k e n n z e i c h n e t, dass die die beiden Komponenten jeweils in unterschiedlichen Partikeln (15a, 15b) enthalten sind und eine Mischung dieser Partikel (15a, 15b) in dem Erzeugnis dispergiert ist. 8. Product according to claim 7, characterized in that the two components are each contained in different particles (15a, 15b) and a mixture of these particles (15a, 15b) is dispersed in the product.
EP09769225A 2008-06-25 2009-06-23 Component with a self-healing surface layer, self-healing enamel or coating powder with self-healing characteristics Withdrawn EP2291465A1 (en)

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CA2729439A1 (en) 2009-12-30
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JP2011525560A (en) 2011-09-22
CA2729439C (en) 2018-03-13
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CN102076790B (en) 2013-11-20
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DE102008030189A1 (en) 2009-12-31
WO2009156376A1 (en) 2009-12-30

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