EP4340592A1 - Method for the production of a hydrophilic coating of a fluoropolymer material - Google Patents
Method for the production of a hydrophilic coating of a fluoropolymer materialInfo
- Publication number
- EP4340592A1 EP4340592A1 EP22728618.4A EP22728618A EP4340592A1 EP 4340592 A1 EP4340592 A1 EP 4340592A1 EP 22728618 A EP22728618 A EP 22728618A EP 4340592 A1 EP4340592 A1 EP 4340592A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluoropolymer material
- fluoropolymer
- dispersion
- silicate
- hydrophilic
- 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.)
- Pending
Links
- 229920002313 fluoropolymer Polymers 0.000 title claims abstract description 55
- 239000004811 fluoropolymer Substances 0.000 title claims abstract description 54
- 239000000463 material Substances 0.000 title claims abstract description 35
- 238000000576 coating method Methods 0.000 title claims abstract description 34
- 239000011248 coating agent Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000006185 dispersion Substances 0.000 claims abstract description 21
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000002105 nanoparticle Substances 0.000 claims abstract description 10
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 claims description 18
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 6
- 238000010422 painting Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims description 4
- 229940095070 tetrapropyl orthosilicate Drugs 0.000 claims description 4
- ZQZCOBSUOFHDEE-UHFFFAOYSA-N tetrapropyl silicate Chemical compound CCCO[Si](OCCC)(OCCC)OCCC ZQZCOBSUOFHDEE-UHFFFAOYSA-N 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- 230000037452 priming Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 230000000181 anti-adherent effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- QHSJIZLJUFMIFP-UHFFFAOYSA-N ethene;1,1,2,2-tetrafluoroethene Chemical group C=C.FC(F)=C(F)F QHSJIZLJUFMIFP-UHFFFAOYSA-N 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920002620 polyvinyl fluoride Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920006358 Fluon Polymers 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920001774 Perfluoroether Polymers 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229920006355 Tefzel Polymers 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
- A01G9/1438—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
-
- 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/02—Polysilicates
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Definitions
- the invention relates to a method for producing a hydrophilic coating of a fluoropolymer material, a coated fluoropolymer material being obtained which has a contact angle with water below 30°, and a hydrophilic fluoropolymer material obtainable by the method.
- Fluoropolymers are polymers based on fluorocarbons with multiple carbon-fluorine bonds, in which a large part or even all of the hydrogen present is usually replaced by fluorine.
- the most well-known fluoropolymers include polyvinyl fluoride (PVF), polyvinylidene difluoride (PVDF), polytetrafluoroethylene (PTFE), ethylene tetrafluoroethylene (ETFE), perfluoroalkoxy polymers (PFA) and tetrafluoroethylene-hexafluoropropylene copolymers (FEP).
- Fluoropolymers have high chemical and thermal stability, good electrical insulating properties, outstanding weather resistance, good notched impact strength, anti-adhesive behavior and they are non-flammable. The anti-adhesive behavior results in low wettability and good sliding properties. Fluoropolymers are also physiologically harmless.
- fluoropolymers are used in high-performance bearings and gaskets for cars and airplanes, fire retardants, cable coatings, kitchenware coatings, pipes and chemical tanks, and implants and catheters for biomedical applications.
- Ethylene-tetrafluoroethylene copolymer is a fluorocopolymer consisting of the monomers tetrafluoroethylene and ethylene and is sold under the trade names Dyneon ETFE (Dyneon), Tefzel (DuPont), Fluon ETFE (Asahi Glass) and F-Clear for films, for example is known.
- ETFE is a derivative of the plastic PTFE, also known as Teflon.
- ETFE Films made of ETFE have a low intrinsic weight and high light and UV transmission (at 200 nm it is 91.5% for a 25 mih thick film, while window glass is opaque at this wavelength). For this reason, ETFE Films with a thickness of 50 to 250 ⁇ m are often used in architecture for membrane constructions, with the films being used, for example, as roofing for swimming pools and greenhouses or other buildings such as football stadiums.
- polyethylene films with a hydrophilic coating are often used in the design of greenhouses and film tunnels. These are UV-permeable and chemically resistant and, due to their hydrophilic characteristics, develop an anti-fog and anti-fog effect.
- the service life of such PE films is rather short and is only a few years, which is why these films usually have to be replaced every 2-3 years.
- ETFE films which have a very long service life, more hydrophilic, i.e. to reduce the water contact angle, in particular to less than 30°.
- hydrophilic properties are imparted to an ETFE film by coating with a colloid sol of inorganic material such as SiO2 or by sputtering with an oxide of a metal such as Si and/or Sn.
- EP 2 096 191 A1 describes a method in which a fluorine-doped silicon oxide layer is applied to an ETFE substrate by means of plasma CVD. This layer gives the substrate high light transmission and a water contact angle of 20° or less.
- the object of the invention is to overcome the disadvantages of the prior art and to provide a hydrophilic fluoropolymer material which has a contact angle with water of less than 30° and has a long service life, as well as to propose a technically relatively simple method for producing a hydrophilic coating by which such a weatherable fluoropolymer material can be obtained.
- a method for producing a hydrophilic coating of a fluoropolymer material preferably a fluoropolymer film, wherein a coated fluoropolymer material is obtained which has a contact angle with water below 30°, comprises the following steps:
- the coating is carried out by conventional coating operations, such as brushing or dipping, which can be carried out, for example, with conventional printing and varnishing equipment.
- the nanoparticles can align themselves in such an orderly manner that the desired hydrophilic effect is produced.
- the nanoscale structures formed, for the formation of which a specific particle size distribution of the silicate particles in the dispersion is advantageous, mean that the contact angle with water for the coated fluoropolymer films is below 30° and therefore the formation of condensation, which is particularly disadvantageous when the films are used for greenhouses, is prevented .
- the mean value of the particle size distribution in the dispersion is 1-100 nm, preferably 5-80 nm, particularly preferably 10-60 nm.
- the applied coating is dried at a temperature of 40-130°C, preferably 60-120°C, particularly preferably 60-100°C. According to a further embodiment of the method according to the invention, the applied coating is preferably dried for a period of 0.01-8 min, preferably 0.05-7 min, particularly preferably 0.1-5 min.
- the silicate nanoparticles include tetraalkoxysilanes, such as tetraethyl orthosilicate (TEOS; also called ethyl silicate or tetraethoxysilane), tetramethyl orthosilicate (TMOS), tetrapropyl orthosilicate (TPOS) and their polymers, the silicate nanoparticles preferably consist of them.
- TEOS tetraethyl orthosilicate
- TMOS tetramethyl orthosilicate
- TPOS tetrapropyl orthosilicate
- the fluoropolymer material that is coated is ethylene tetrafluoroethylene copolymer (ETFE), polyvinylidene difluoride (PVDF), and/or a fluoropolymer (FP).
- ETFE ethylene tetrafluoroethylene copolymer
- PVDF polyvinylidene difluoride
- FP fluoropolymer
- the fluoropolymer material that is to be provided with the hydrophilic coating may already be coated before the process of the invention is used.
- flattening or primer layers can be formed on the fluoropolymer material, over which the silicate dispersion is applied.
- the surface energy of the fluoropolymer material is advantageously increased by means of a primer, with the primer preferably being based on water-dilutable acrylate and/or polyurethane binders.
- the silicate dispersion is applied to the fluoropolymer material, for example, in a layer thickness of 0.1-30 ⁇ m.
- the amount of dry layer applied on the fluoropolymer material can be, for example, 0.1-20 g/m 2 .
- the silicate dispersion is preferably applied to the fluoropolymer material at atmospheric pressure. As a result, simple industry-standard printing devices and painting systems can advantageously be used for processing the dispersion.
- the applied coating is preferably dried by a circulating air dryer. This enables homogeneous drying, which is also faster.
- the silicate dispersion is applied to a fluoropolymer film by means of a gravure cylinder in a painting installation, with the dryer length preferably being 10-50 m and the web speed being 10-100 m/min.
- the second aspect of the invention relates to a hydrophilic fluoropolymer material which has a contact angle with water of less than 30° and can be obtained in particular by the method for producing a hydrophilic coating described above.
- this hydrophilic fluoropolymer material is a coated fluoropolymer film.
- the example shows that the coating of silicate nanoparticles produced according to the invention leads to the surface of the fluoropolymer material becoming hydrophilic, as a result of which a film of water can form on the surface.
- tetraethyl silicate nanoparticles which have optionally been hydrophilically surface-modified, are dispersed in water with stirring.
- the solids content of the dispersion is about 10% by weight.
- the processing and application of the water-dilutable silicate dispersion to an ETFE film is carried out using a gravure cylinder on a painting system that is operated at atmospheric pressure.
- the screen cylinder is immersed in a trough filled with the dispersion. After the cylinder has been scraped off, the coating mass is transferred to the foil, which is guided over guide rollers and pressed against the gravure cylinder.
- the applied coating is then passed through a circulating air dryer.
- the web or drying length is 10-50 m and the web speed is increased 10-100 m/min set.
- the reaction temperature reaches a value between 60°C and 100°C.
- the amount of dry layer applied to the ETFE film is in the range of 0.1-20 g/m2.
- the contact angle of the coating is then measured and is ⁇ 30°.
- the light-stable layer structure of the fluoropolymer film which is produced in this way without great technical effort, is ideally suited for both indoor and outdoor use.
- cost-efficient buildings can be erected or technical materials can be manufactured in lightweight constructions, which also have a very long service life of around 20 years, unlike short-lived (2-5 years) PVC or polyethylene films.
- the coating produced according to the invention has a contact angle with water of ⁇ 30°, as shown by accelerated
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a method for preparing a hydrophilic coating of a fluoropolymer material, preferably a fluoropolymer film, comprising the following steps: providing an aqueous dispersion of silicate nanoparticles, applying the silicate dispersion to the fluoropolymer material, and drying the applied coating, whereby a coated fluoropolymer material having a contact angle with water below 30° is obtained. The fluoropolymer material coated in this way is extremely weather-resistant and has a long service life.
Description
VERFAHREN ZUR HERSTELLUNG EINER HYDROPHILEN BESCHICHTUNG PROCESS FOR MAKING A HYDROPHILIC COATING
EINES FLUORPOLYMERMATERIALS OF A FLUOROPOLYMER MATERIAL
GEBIET DER ERFINDUNG FIELD OF THE INVENTION
Die Erfindung betrifft ein Verfahren zur Herstellung einer hydrophilen Beschichtung eines Fluorpolymermaterials, wobei ein beschichtetes Fluorpolymermaterial erhalten wird, das einen Kontaktwinkel mit Wasser unter 30° aufweist, sowie ein durch das Verfahren erhältliches hydrophiles Fluorpolymermaterial. The invention relates to a method for producing a hydrophilic coating of a fluoropolymer material, a coated fluoropolymer material being obtained which has a contact angle with water below 30°, and a hydrophilic fluoropolymer material obtainable by the method.
STAND DER TECHNIK STATE OF THE ART
Fluorpolymere, oder auch Fluorkunststoffe, sind Polymere auf Basis von Fluorkohlenstoffen mit mehrfachen Kohlenstoff-Fluor-Bindungen, bei denen meist ein großer Teil oder sogar alle sonst enthaltenen Wasserstoffe durch Fluor ersetzt sind. Zu den bekanntesten Fluorpolymeren zählen unter anderem Polyvinylfluorid (PVF), Polyvinylidendifluorid (PVDF), Polytetrafluorethylen (PTFE), Ethylentetrafluorethylen (ETFE), Perfluoralkoxy-Polymere (PFA) und Tetrafluorethylen-Hexafluorpropylen-Copolymere (FEP). Fluoropolymers, or also fluoroplastics, are polymers based on fluorocarbons with multiple carbon-fluorine bonds, in which a large part or even all of the hydrogen present is usually replaced by fluorine. The most well-known fluoropolymers include polyvinyl fluoride (PVF), polyvinylidene difluoride (PVDF), polytetrafluoroethylene (PTFE), ethylene tetrafluoroethylene (ETFE), perfluoroalkoxy polymers (PFA) and tetrafluoroethylene-hexafluoropropylene copolymers (FEP).
Fluorpolymere besitzen eine hohe chemische und thermische Stabilität, gute elektrische Isoliereigenschaften, hervorragende Witterungsbeständigkeit, eine gute Kerbschlagzähigkeit, antiadhäsives Verhalten und sie sind unbrennbar. Aus dem antiadhäsiven Verhalten folgen eine geringe Benetzbarkeit sowie gute Gleiteigenschaften. Fluorpolymere sind außerdem physiologisch unbedenklich. Fluoropolymers have high chemical and thermal stability, good electrical insulating properties, outstanding weather resistance, good notched impact strength, anti-adhesive behavior and they are non-flammable. The anti-adhesive behavior results in low wettability and good sliding properties. Fluoropolymers are also physiologically harmless.
Diese Eigenschaften machen Fluorpolymere sehr vielseitig. So werden sie beispielsweise in Hochleistungslagem und Dichtungen für Autos und Flugzeuge, feuerabweisenden Stoffen, Kabelbeschichtungen, Beschichtungen von Küchenprodukten, Rohren und Chemikalientanks sowie Implantaten und Kathetern für Biomedizin- Anwendungen verwendet. These properties make fluoropolymers very versatile. For example, they are used in high-performance bearings and gaskets for cars and airplanes, fire retardants, cable coatings, kitchenware coatings, pipes and chemical tanks, and implants and catheters for biomedical applications.
Ethylen-Tetrafluorethylen-Copolymer (ETFE) ist ein Fluor-Copolymer, das aus den Monomeren Tetrafluorethylen und Ethylen besteht und beispielsweise unter den Handelsnamen Dyneon ETFE (Dyneon), Tefzel (DuPont), Fluon ETFE (Asahi Glass) sowie F-Clear für Folien bekannt ist. Bei ETFE handelt es sich um ein Derivat des auch als Teflon bekannten Kunststoffs PTFE. Ethylene-tetrafluoroethylene copolymer (ETFE) is a fluorocopolymer consisting of the monomers tetrafluoroethylene and ethylene and is sold under the trade names Dyneon ETFE (Dyneon), Tefzel (DuPont), Fluon ETFE (Asahi Glass) and F-Clear for films, for example is known. ETFE is a derivative of the plastic PTFE, also known as Teflon.
Folien aus ETFE weisen ein geringes Eigengewicht sowie eine hohe Licht- und UV- Durchlässigkeit auf (bei 200 nm beträgt sie bei einer 25 mih dicken Folie 91,5 %, während Fensterglas bei dieser Wellenlänge undurchlässig ist). Aus diesem Grund werden ETFE-
Folien mit einer Stärke von 50 bis 250 pm in der Architektur gerne bei Membrankonstruktionen verwendet, wobei die Folien zum Beispiel als Überdachung von Schwimmbädern und Gewächshäusern oder anderen Gebäuden, wie Fußballstadien, zum Einsatz kommen. Films made of ETFE have a low intrinsic weight and high light and UV transmission (at 200 nm it is 91.5% for a 25 mih thick film, while window glass is opaque at this wavelength). For this reason, ETFE Films with a thickness of 50 to 250 μm are often used in architecture for membrane constructions, with the films being used, for example, as roofing for swimming pools and greenhouses or other buildings such as football stadiums.
Wegen der geringen Wasserbenetzbarkeit solcher Folien aufgrund ihrer Hydrophobizität kann es jedoch zu einer unerwünschten Bildung von Kondenswasser kommen, das zu einer Verschlechterung der Lichtdurchlässigkeit führt und dessen herabfallende Tropfen insbesondere bei Gewächshäusern zu einer Beeinträchtigung des Wachstums der angebauten Kulturpflanzen führen können. Due to the low water wettability of such films due to their hydrophobicity, however, an undesirable formation of condensation can occur, which leads to a deterioration in light transmission and its falling drops can impair the growth of the cultivated plants, especially in greenhouses.
Um diese Probleme zu vermeiden werden häufig hydrophil beschichtete (z.B. nach dem Verfahren der EP 1647568 Al) Polyethylen-Folien bei der Gestaltung von Gewächshäusern und Folientunnel eingesetzt. Diese sind UV-durchlässig sowie chemisch resistent und entfalten aufgrund ihrer hydrophilen Charakteristika eine Antitau- und Antinebelwirkung. Allerdings ist die Lebensdauer von solchen PE-Folien eher gering und beträgt nur wenige Jahre, weshalb diese Folien in der Regel alle 2-3 Jahre ausgetauscht werden müssen. In order to avoid these problems, polyethylene films with a hydrophilic coating (e.g. according to the process of EP 1647568 A1) are often used in the design of greenhouses and film tunnels. These are UV-permeable and chemically resistant and, due to their hydrophilic characteristics, develop an anti-fog and anti-fog effect. However, the service life of such PE films is rather short and is only a few years, which is why these films usually have to be replaced every 2-3 years.
Es ist deshalb wünschenswert und vorteilhaft, ETFE-Folien, welche eine sehr lange Lebensdauer aufweisen, hydrophiler auszubilden, d.h. den Wasserkontaktwinkel zu senken, insbesondere unter 30° zu verringern. It is therefore desirable and advantageous to make ETFE films, which have a very long service life, more hydrophilic, i.e. to reduce the water contact angle, in particular to less than 30°.
Gemäß EP 1 319495 Al wird einer ETFE-Folie durch Beschichtung mit einem Kolloid-Sol aus anorganischem Material wie S1O2 oder durch Sputtern mit einem Oxid eines Metalls wie Si und/oder Sn hydrophile Eigenschaft verliehen. According to EP 1 319495 A1, hydrophilic properties are imparted to an ETFE film by coating with a colloid sol of inorganic material such as SiO2 or by sputtering with an oxide of a metal such as Si and/or Sn.
In EP 2 096 191 Al wird ein Verfahren beschrieben, bei dem eine fluordotierte Siliziumoxidschicht mittels Plasma-CVD auf ein ETFE-Substrat aufgebracht wird. Diese Schicht verleiht dem Substrat eine hohe Lichtdurchlässigkeit und einen Wasserkontaktwinkel von höchstens 20°. EP 2 096 191 A1 describes a method in which a fluorine-doped silicon oxide layer is applied to an ETFE substrate by means of plasma CVD. This layer gives the substrate high light transmission and a water contact angle of 20° or less.
AUFGABE DER ERFINDUNG OBJECT OF THE INVENTION
Aufgabe der Erfindung ist es, die Nachteile des Stands der Technik zu überwinden und ein hydrophiles Fluorpolymermaterial bereitzustellen, das einen Kontaktwinkel mit Wasser unter 30° aufweist und eine lange Lebensdauer besitzt, sowie ein technisch relativ einfaches Verfahren zur Flerstellung einer hydrophilen Beschichtung vorzuschlagen, durch das ein solches witterungsstabiles Fluorpolymermaterial erhalten werden kann.
DARSTELLUNG DER ERFINDUNG The object of the invention is to overcome the disadvantages of the prior art and to provide a hydrophilic fluoropolymer material which has a contact angle with water of less than 30° and has a long service life, as well as to propose a technically relatively simple method for producing a hydrophilic coating by which such a weatherable fluoropolymer material can be obtained. PRESENTATION OF THE INVENTION
Diese Aufgabe wird bei einem Verfahren der eingangs genannten Art durch die Merkmale der unabhängigen Ansprüche gelöst. Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche. In a method of the type mentioned at the outset, this object is achieved by the features of the independent claims. Developments of the invention are the subject matter of the dependent claims.
Gemäß dem ersten Aspekt der Erfindung umfasst ein Verfahren zur Herstellung einer hydrophilen Beschichtung eines Fluorpolymermaterials, vorzugsweise einer Fluorpolymerfolie, wobei ein beschichtetes Fluorpolymermaterial erhalten wird, das einen Kontaktwinkel mit Wasser unter 30° aufweist, folgende Schritte: According to the first aspect of the invention, a method for producing a hydrophilic coating of a fluoropolymer material, preferably a fluoropolymer film, wherein a coated fluoropolymer material is obtained which has a contact angle with water below 30°, comprises the following steps:
Bereitstellen einer wässrigen Dispersion von Silikat-Nanopartikeln, providing an aqueous dispersion of silicate nanoparticles,
Aufbringen der Silikatdispersion auf dem Fluorpolymermaterial und Trocknen der aufgebrachten Beschichtung. Applying the silicate dispersion to the fluoropolymer material and drying the applied coating.
Anders als beim Stand der Technik ist es erfindungsgemäß nicht notwendig, sich zur Aufbringung der Beschichtung einer plasmaunterstützten chemischen Gasphasenabscheidung oder ähnlicher Prozesse zu bedienen, die aufwendige und kostenintensive Vorrichtungen und Anlagen erforderlich machen. Die Beschichtung erfolgt gemäß der Erfindung durch konventionelle Beschichtungsvorgänge, wie Streichen oder Tauchen, die z.B. mit herkömmlichen Anlagen zum Drucken und Lackieren vorgenommen werden können. In contrast to the prior art, according to the invention it is not necessary to use a plasma-enhanced chemical vapor deposition or similar processes for applying the coating, which necessitate complex and cost-intensive devices and systems. According to the invention, the coating is carried out by conventional coating operations, such as brushing or dipping, which can be carried out, for example, with conventional printing and varnishing equipment.
Bei der nach dem Aufbringen der Nanopartikeldispersion auf dem Fluorpolymermaterial erfindungsgemäß durchgeführten thermischen Trocknung können sich die Nanopartikel derart geordnet ausrichten, dass der gewünschte hydrophile Effekt entsteht. Die gebildeten nanoskaligen Strukturen, für deren Entstehen eine bestimmte Partikelgrößenverteilung der Silikatteilchen in der Dispersion von Vorteil ist, führen dazu, dass der Kontaktwinkel mit Wasser bei den beschichteten Fluorpolymerfolien unter 30° liegt und deshalb eine insbesondere bei Verwendung der Folien für Gewächshäuser nachteilige Kondenswasserbildung unterbunden wird. During the thermal drying carried out according to the invention after the nanoparticle dispersion has been applied to the fluoropolymer material, the nanoparticles can align themselves in such an orderly manner that the desired hydrophilic effect is produced. The nanoscale structures formed, for the formation of which a specific particle size distribution of the silicate particles in the dispersion is advantageous, mean that the contact angle with water for the coated fluoropolymer films is below 30° and therefore the formation of condensation, which is particularly disadvantageous when the films are used for greenhouses, is prevented .
Gemäß einer bevorzugten Ausführungsform beträgt der Mittelwert der Partikelgrößenverteilung in der Dispersion 1-100 nm, bevorzugt 5-80 nm, besonders bevorzugt 10-60 nm. According to a preferred embodiment, the mean value of the particle size distribution in the dispersion is 1-100 nm, preferably 5-80 nm, particularly preferably 10-60 nm.
Gemäß einer anderen bevorzugten Ausführungsform erfolgt das Trocknen der aufgebrachten Beschichtung bei einer Temperatur von 40-130°C, bevorzugt 60-120°C, besonders bevorzugt 60-100°C.
Nach einer weiteren Ausgestaltung des erfindungsgemäßen Verfahrens erfolgt das Trocknen der aufgebrachten Beschichtung vorzugsweise für eine Dauer von 0,01-8 min, bevorzugt 0,05-7 min, besonders bevorzugt 0,1-5 min. According to another preferred embodiment, the applied coating is dried at a temperature of 40-130°C, preferably 60-120°C, particularly preferably 60-100°C. According to a further embodiment of the method according to the invention, the applied coating is preferably dried for a period of 0.01-8 min, preferably 0.05-7 min, particularly preferably 0.1-5 min.
In einer bevorzugten Ausführungsform umfassen die Silikat-Nanopartikel Tetraalkoxysilane, wie Tetraethylorthosilikat (TEOS; auch Ethylsilikat oder Tetraethoxysilan genannt), Tetramethylorthosilikat (TMOS), Tetrapropylorthosilikat (TPOS) und deren Polymere, vorzugsweise bestehen die Silikat-Nanopartikel daraus. In a preferred embodiment, the silicate nanoparticles include tetraalkoxysilanes, such as tetraethyl orthosilicate (TEOS; also called ethyl silicate or tetraethoxysilane), tetramethyl orthosilicate (TMOS), tetrapropyl orthosilicate (TPOS) and their polymers, the silicate nanoparticles preferably consist of them.
Vorzugsweise handelt es sich beim Fluorpolymermaterial, das beschichtet wird, um Ethylen- tetrafluorethylen-copolymer (ETFE), Polyvinylidendifluorid (PVDF) und/oder ein Fluorpolymer (FP). Preferably, the fluoropolymer material that is coated is ethylene tetrafluoroethylene copolymer (ETFE), polyvinylidene difluoride (PVDF), and/or a fluoropolymer (FP).
Das Fluorpolymermaterial, das mit der hydrophilen Beschichtung versehen wird, also z.B. die Fluorpolymerfolie, kann bereits beschichtet sein, bevor das erfindungsgemäße Verfahren zur Anwendung kommt. Beispielsweise können auf dem Fluorpolymermaterial Flaftvermittler- oder Grundierungsschichten ausgebildet sein, über denen die Silikatdispersion aufgebracht wird. The fluoropolymer material that is to be provided with the hydrophilic coating, such as the fluoropolymer film, may already be coated before the process of the invention is used. For example, flattening or primer layers can be formed on the fluoropolymer material, over which the silicate dispersion is applied.
Gemäß einer Ausführungsform wird die Oberflächenenergie des Fluorpolymermaterials vorteilhaft mittels Grundierung erhöht, wobei die Grundierung bevorzugt auf Basis von wasserverdünnbaren Acrylat- und/oder Polyurethanbindemitteln erfolgt. According to one embodiment, the surface energy of the fluoropolymer material is advantageously increased by means of a primer, with the primer preferably being based on water-dilutable acrylate and/or polyurethane binders.
Aufgrund der Reaktionsträgheit der Fluorpolymere ist eine chemische Verbindung normalerweise schwierig, weshalb es für eine gute Haftung der Beschichtung auf der Folie von Vorteil sein kann, wenn die Oberflächenenergie des Fluorpolymermaterials vor der Beschichtung mittels Grundierung erhöht wird. Hierdurch können die chemischen und physikalischen Eigenschaften der Silikatbeschichtung und damit deren Haftung verbessert werden. Als bevorzugte Grundierung werden dabei Bindemittel auf Basis von Acrylaten oder Polyurethanen verwendet. Because of the inertness of fluoropolymers, chemical bonding is typically difficult, so increasing the surface energy of the fluoropolymer material with a primer prior to coating can be beneficial for good adhesion of the coating to the film. This can improve the chemical and physical properties of the silicate coating and thus its adhesion. Binders based on acrylates or polyurethanes are used as the preferred primer.
Die Silikatdispersion wird beispielsweise in einer Schichtdicke von 0,1-30 pm auf dem Fluorpolymermaterial aufgebracht. The silicate dispersion is applied to the fluoropolymer material, for example, in a layer thickness of 0.1-30 μm.
Die auf dem Fluorpolymermaterial aufgetragene Trockenschichtmenge kann zum Beispiel 0,1-20 g/m2 betragen.
Das Aufbringen der Silikatdispersion auf dem Fluorpolymermaterial erfolgt bevorzugt bei Atmosphärendruck. Für die Verarbeitung der Dispersion können dadurch vorteilhafterweise einfache branchenübliche Druckvorrichtungen und Lackieranlagen eingesetzt werden. The amount of dry layer applied on the fluoropolymer material can be, for example, 0.1-20 g/m 2 . The silicate dispersion is preferably applied to the fluoropolymer material at atmospheric pressure. As a result, simple industry-standard printing devices and painting systems can advantageously be used for processing the dispersion.
Bevorzugt erfolgt das Trocknen der aufgebrachten Beschichtung durch einen Umlufttrockner. Dieser ermöglicht eine homogene Trocknung, die zusätzlich schneller erfolgt. The applied coating is preferably dried by a circulating air dryer. This enables homogeneous drying, which is also faster.
Gemäß einer bevorzugten Ausführungsform erfolgt das Aufbringen der Silikatdispersion auf einer Fluorpolymerfolie mittels Tiefdruckzylinder in einer Lackieranlage, wobei die Trocknerlänge bevorzugt 10-50 m und die Bahngeschwindigkeit 10-100 m/min beträgt. According to a preferred embodiment, the silicate dispersion is applied to a fluoropolymer film by means of a gravure cylinder in a painting installation, with the dryer length preferably being 10-50 m and the web speed being 10-100 m/min.
Nachfolgend wird die Erfindung anhand eines Beispiels näher erläutert. The invention is explained in more detail below using an example.
Der zweite Aspekt der Erfindung betrifft ein hydrophiles Fluorpolymermaterial, das einen Kontaktwinkel mit Wasser unter 30° aufweist und insbesondere durch das oben beschriebene Verfahren zur Herstellung einer hydrophilen Beschichtung erhältlich ist. The second aspect of the invention relates to a hydrophilic fluoropolymer material which has a contact angle with water of less than 30° and can be obtained in particular by the method for producing a hydrophilic coating described above.
Vorzugsweise handelt es sich bei diesem hydrophilen Fluorpolymermaterial um eine beschichtete Fluorpolymerfolie. Preferably, this hydrophilic fluoropolymer material is a coated fluoropolymer film.
Beispiel: Example:
Durch das Beispiel wird gezeigt, dass die erfindungsgemäß hergestellte Beschichtung aus Silikat-Nanopartikeln dazu fuhrt, dass die Oberfläche des Fluorpolymermaterials hydrophil wird, wodurch sich auf der Oberfläche ein Wasserfilm bilden kann. The example shows that the coating of silicate nanoparticles produced according to the invention leads to the surface of the fluoropolymer material becoming hydrophilic, as a result of which a film of water can form on the surface.
Für die Bereitstellung der wässrigen Dispersion werden Tetraethylsilikat-Nanopartikel, die gegebenenfalls hydrophil oberflächenmodifiziert wurden, unter Rühren in Wasser dispergiert. Der Feststoffgehalt der Dispersion beträgt etwa 10 Gew.%. To provide the aqueous dispersion, tetraethyl silicate nanoparticles, which have optionally been hydrophilically surface-modified, are dispersed in water with stirring. The solids content of the dispersion is about 10% by weight.
Die Verarbeitung und Aufbringung der wasserverdünnbaren Silikatdispersion auf einer ETFE-Folie erfolgt mittels Tiefdruckzylinder auf einer Lackieranlage, die bei Atmosphärendruck betrieben wird. Der Rasterzylinder taucht dabei in eine Wanne ein, die mit der Dispersion befällt ist. Nach Abrakeln des Zylinders wird die Beschichtungsmasse auf die über Leitrollen geführte und an den Tiefdruckzylinder angepresste Folie übertragen. The processing and application of the water-dilutable silicate dispersion to an ETFE film is carried out using a gravure cylinder on a painting system that is operated at atmospheric pressure. The screen cylinder is immersed in a trough filled with the dispersion. After the cylinder has been scraped off, the coating mass is transferred to the foil, which is guided over guide rollers and pressed against the gravure cylinder.
Anschließend wird die aufgetragene Beschichtung durch einen Umlufttrockner geführt. Die Bahn- bzw. Trocknungslänge beträgt dabei 10-50 m und die Bahngeschwindigkeit wird auf
10-100 m/min eingestellt. Während des Trocknungsvorgangs erreicht die Reaktionstemperatur einen Wert zwischen 60°C und 100°C. Die auf der ETFE-Folie aufgetragene Trockenschichtmenge liegt in einem Bereich von 0,1-20 g/m . Der Kontaktwinkel der Beschichtung wird danach gemessen und beträgt < 30°. The applied coating is then passed through a circulating air dryer. The web or drying length is 10-50 m and the web speed is increased 10-100 m/min set. During the drying process, the reaction temperature reaches a value between 60°C and 100°C. The amount of dry layer applied to the ETFE film is in the range of 0.1-20 g/m². The contact angle of the coating is then measured and is <30°.
Der derart ohne großen technischen Aufwand hergestellte lichtstabile Schichtaufbau der Fluorpolymerfolie ist sowohl für den Innen- als auch den Außeneinsatz bestens geeignet. Statt teuren und schweren Glaskonstruktionen können damit kosteneffiziente Gebäude errichtet oder technische Werkstoffe in Leichtbauweise gefertigt werden, welche außerdem anders als kurzlebige (2-5 Jahre) PVC- oder Polyethylenfolien eine sehr lange Lebensdauer von ca. 20 Jahren aufweisen. The light-stable layer structure of the fluoropolymer film, which is produced in this way without great technical effort, is ideally suited for both indoor and outdoor use. Instead of expensive and heavy glass constructions, cost-efficient buildings can be erected or technical materials can be manufactured in lightweight constructions, which also have a very long service life of around 20 years, unlike short-lived (2-5 years) PVC or polyethylene films.
Die erfindungsgemäß hergestellte Beschichtung weist selbst nach jahrelanger Bewitterung einen Kontaktwinkel mit Wasser von < 30° auf, wie anhand beschleunigterEven after years of weathering, the coating produced according to the invention has a contact angle with water of <30°, as shown by accelerated
Bewitterungsprüfungen mittels Xenonprüfgerät festgestellt wurde: der hydrophile Effekt der Beschichtung ist hier auch noch nach 9000 Stunden nachzuweisen.
Weathering tests using a xenon tester: the hydrophilic effect of the coating can still be demonstrated here after 9000 hours.
Claims
1. Verfahren zur Herstellung einer hydrophilen Beschichtung eines Fluorpolymermaterials, vorzugsweise einer Fluorpolymerfolie, wobei ein beschichtetes Fluorpolymermaterial erhalten wird, das einen Kontaktwinkel mit Wasser unter 30° aufweist, dadurch gekennzeichnet, dass es folgende Schritte umfasst: 1. Process for the production of a hydrophilic coating of a fluoropolymer material, preferably a fluoropolymer film, whereby a coated fluoropolymer material is obtained which has a contact angle with water below 30°, characterized in that it comprises the following steps:
Bereitstellen einer wässrigen Dispersion von Silikat-Nanopartikeln,providing an aqueous dispersion of silicate nanoparticles,
Aufbringen der Silikatdispersion auf dem Fluorpolymermaterial und Trocknen der aufgebrachten Beschichtung. Applying the silicate dispersion to the fluoropolymer material and drying the applied coating.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Mittelwert der Partikelgrößenverteilung in der Dispersion 1-100 nm, bevorzugt 5-80 nm, besonders bevorzugt 10-60 nm, beträgt. 2. The method according to claim 1, characterized in that the mean value of the particle size distribution in the dispersion is 1-100 nm, preferably 5-80 nm, particularly preferably 10-60 nm.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Trocknen der aufgebrachten Beschichtung bei einer Temperatur von 40-130°C, bevorzugt 60- 120°C, besonders bevorzugt 60-100°C, erfolgt. 3. The method according to claim 1 or 2, characterized in that the drying of the applied coating takes place at a temperature of 40-130°C, preferably 60-120°C, particularly preferably 60-100°C.
4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Trocknen der aufgebrachten Beschichtung für eine Dauer von 0,01-8 min, bevorzugt 0,05-7 min, besonders bevorzugt 0,1-5 min, erfolgt. 4. The method according to any one of the preceding claims, characterized in that the drying of the applied coating takes place for a period of 0.01-8 min, preferably 0.05-7 min, particularly preferably 0.1-5 min.
5. Verfahren nach nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Silikat-Nanopartikel Tetraalkoxysilane, wie Tetraethylorthosilikat (TEOS), Tetramethylorthosilikat (TMOS), Tetrapropylorthosilikat (TPOS) und deren Polymere, umfassen, vorzugweise daraus bestehen.
5. The method according to claim 1, characterized in that the silicate nanoparticles comprise, preferably consist of, tetraalkoxysilanes, such as tetraethyl orthosilicate (TEOS), tetramethyl orthosilicate (TMOS), tetrapropyl orthosilicate (TPOS) and their polymers.
6. Verfahren nach nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Fluorpolymermaterial Ethylen-tetrafluorethylen-copolymer (ETFE), Polyvinylidendifluorid (PVDF) und/oder ein Fluorpolymer (FP) ist. 6. The method according to any one of the preceding claims, characterized in that the fluoropolymer material is ethylene-tetrafluoroethylene copolymer (ETFE), polyvinylidene difluoride (PVDF) and/or a fluoropolymer (FP).
7. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Oberflächenenergie des Fluorpolymermaterials mittels Grundierung erhöht wird. 7. The method according to any one of the preceding claims, characterized in that the surface energy of the fluoropolymer material is increased by means of priming.
8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass die Grundierung auf Basis von wasserverdünnbaren Acrylat- und/oder Polyurethanbindemitteln erfolgt. 8. The method according to claim 7, characterized in that the primer is based on water-dilutable acrylate and / or polyurethane binders.
9. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Aufbringen der Silikatdispersion auf dem Fluorpolymermaterial bei Atmosphärendruck erfolgt. 9. The method according to any one of the preceding claims, characterized in that the application of the silicate dispersion takes place on the fluoropolymer material at atmospheric pressure.
10. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Trocknen der aufgebrachten Beschichtung durch einen Umlufttrockner erfolgt. 10. The method according to any one of the preceding claims, characterized in that the drying of the applied coating is carried out by a circulating air dryer.
11. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Aufbringen der Silikatdispersion auf einer Fluorpolymerfolie mittels Tiefdruckzylinder in einer Lackieranlage erfolgt, wobei die Trocknerlänge bevorzugt 10-50 m und die Bahngeschwindigkeit 10-100 m/min beträgt. 11. The method according to any one of the preceding claims, characterized in that the application of the silicate dispersion is carried out on a fluoropolymer film by means of gravure cylinders in a painting system, the dryer length preferably being 10-50 m and the web speed 10-100 m/min.
12. Hydrophiles Fluorpolymermaterial, das einen Kontaktwinkel mit Wasser unter 30° aufweist, insbesondere erhältlich durch das Verfahren nach einem der Ansprüche 1 bis 11. 12. Hydrophilic fluoropolymer material which has a contact angle with water of less than 30°, obtainable in particular by the method according to any one of claims 1 to 11.
13. Hydrophiles Fluorpolymermaterial nach Anspruch 12, dadurch gekennzeichnet, dass es sich um eine beschichtete Fluorpolymerfolie handelt.
13. Hydrophilic fluoropolymer material according to claim 12, characterized in that it is a coated fluoropolymer film.
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EP21175077.3A EP4091437A1 (en) | 2021-05-20 | 2021-05-20 | Method for producing a hydrophilic coating on a fluoropolymer material |
PCT/EP2022/062935 WO2022243162A1 (en) | 2021-05-20 | 2022-05-12 | Method for the production of a hydrophilic coating of a fluoropolymer material |
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EP21175077.3A Withdrawn EP4091437A1 (en) | 2021-05-20 | 2021-05-20 | Method for producing a hydrophilic coating on a fluoropolymer material |
EP22728618.4A Pending EP4340592A1 (en) | 2021-05-20 | 2022-05-12 | Method for the production of a hydrophilic coating of a fluoropolymer material |
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DE102004049609A1 (en) | 2004-10-12 | 2006-04-13 | Mitsubishi Polyester Film Gmbh | Polyester film with hydrophilic coating, process for its preparation and its use |
CN101528976B (en) | 2006-11-02 | 2011-04-20 | 旭硝子株式会社 | Ethylene-tetrafluoroethylene copolymer molded product and method for producing the same |
AU2019385725A1 (en) * | 2018-11-23 | 2021-06-17 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Coated ETFE film, method for producing same, and use of same |
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