WO2017148972A1 - Transparent conductive films based on polyvinyl acetal - Google Patents

Transparent conductive films based on polyvinyl acetal Download PDF

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Publication number
WO2017148972A1
WO2017148972A1 PCT/EP2017/054689 EP2017054689W WO2017148972A1 WO 2017148972 A1 WO2017148972 A1 WO 2017148972A1 EP 2017054689 W EP2017054689 W EP 2017054689W WO 2017148972 A1 WO2017148972 A1 WO 2017148972A1
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WO
WIPO (PCT)
Prior art keywords
electric conductive
conductive film
film according
coating
transparent electric
Prior art date
Application number
PCT/EP2017/054689
Other languages
French (fr)
Inventor
Robert Fuss
Florian MUMMY
Felix BIER
Original Assignee
Basf Se
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
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Publication of WO2017148972A1 publication Critical patent/WO2017148972A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys

Definitions

  • TC-PET transparent and electrically conductive PET based films
  • PET films are subject to mechanical loads during processing, so scratches can occur easily on the surface of such films. These scratches can cause light scattering in the final laminate because the material doesn't melt during lamination. Also surface irregularities can occur during the production of the PET substrates, which are caused by stretching of the material and also lead to light scattering or haze in its final application.
  • TC-PET films are usually coated with transparent conductive metal oxides like indium tin oxide (ITO) or others, which are very brittle. Hence the resulting film is not flexible and/or the brittle coating delaminates.
  • ITO indium tin oxide
  • a conventional TC-PET film also is not reliable and leads to disadvantages during transportation and processing of the film.
  • PET based films also show poor adhesion to a conventional lamination film based on e.g. polyvinyl butyral (PVB).
  • PVB polyvinyl butyral
  • resulting laminates exhibit poor mechanical properties or call for an adhesion agent.
  • scratches and surface irregularities of PET based films do not disappear during lamination processes due to temperatures below their melting point. Therefore, it would be advantageous to provide a substrate for conductive films having a melting point below standard glass lamination temperatures and adhesion compatibility to e.g. PVB based lamination films coated with a flexible transparent, electrically conductive coating.
  • object of the invention are transparent electric conductive films based on polyvinyl acetal, ionomer or ethylene vinyl acetate (EVA) comprising at least on one surface with a coating of electric conductive, metallic nanowires having an average diameter of 10 to 1000 nm and an average length of 10 to 1000 ⁇ .
  • EVA ethylene vinyl acetate
  • the electric conductive metallic nanowires have an average diameter of 10 to 200 nm or 10 - 100 nm and/or an average length of 10 to 100 ⁇ .
  • the electric conductive nanowires may comprise or consist of at least of the metals selected from the group consisting of silver (Ag), gold (Au), copper (Cu), aluminum (Al), nickel (Ni), cobalt (Co), platinum (Pt), palladium (Pd), tungsten (Wo) or iron (Fe).
  • the electric conductive nanowires are doped with materials selected from the group consisting of polyaniline, poly(3,4- ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), carbon nanotubes (CNT), carbon nanobuds (CNB), graphene, indium tin oxide (ITO), fluorine tin oxide (FTO), aluminum zinc oxide (AZO), antimony tin oxide (ATO), gallium zinc oxide (GZO), fluorine zinc oxide (FZO).
  • Suitable nanowires can be manufactured according to US7922787 ore are commercially available from Sigma Aldrich, Novarials or Cambrios Technologies Corporation (USA).
  • the electric conductive metallic nanowires are provided to the film based on polyvinyl acetal, ionomer or ethylene vinyl acetate as coating having a final thickness of 10 nm to 10 ⁇ , preferably a final thickness of 10 nm to 1 ⁇ , most preferred a thickness of 10 nm to 500 nm.
  • the coating of electric conductive metallic nanowires may have a concentration of r 0.001 g - 10 g nanowires per square meter, preferably 0.001 g - 2,5 g nanowires per square meter, most preferred 0.001 g— 1 g nanowires per square meter.
  • the coating may be applied to whole surface film based on polyvinyl acetal, ionomer or ethylene vinyl acetate i.e. covering the surface without voids.
  • the coating is applied to a part of the surface in any form of a surface pattern, like grids, stripes, waves, random or any non-random structure. This pattern may be applied directly or in a second step after applying the coating areal on the whole substrate by removing the coating at undesired surface locations.
  • Transparent electric conductive film according to invention may be provided with the coating on both sides or wherein a first surface is provided with the conductive coating and a second surface without the conductive coating.
  • the coating decreases the sheet resistance of the film based on polyvinyl acetal from about 10E10 ⁇ /D to of 0.1 to 1000 ⁇ /D.
  • the sheet resistance of the films according to the invention is 0.1 to 100 ⁇ /D, more preferred 0.1 to 20 ⁇ /D.
  • the resulting films have a high visible light transmission of at least 80 % measured according to DIN EN 410.
  • the film according to the invention may have a thickness (including the coating) of 10 ⁇ to 1500 ⁇ , preferable a thickness of 10 to 125 ⁇ and most preferred a thickness of 10 ⁇ - 60 ⁇ .
  • the coating may be applied to film based on polyvi- nyl acetal, ionomer or EVA provided with a certain roughness, for example a roughness Rz of 10-0.1 ⁇ .
  • a roughness Rz for example a roughness Rz of 10-0.1 ⁇ .
  • Rz roughness
  • a lower roughness also leads to a lower specific surface of the substrate.
  • the roughness Rz of the film based on polyvinyl acetal is measured according to EN ISO 4287.
  • the polyvinyl acetal used in accordance with the invention contain polyvinyl acetals, which are produced by acetalisation of polyvinyl alcohol or ethylene vinyl alcohol copolymer.
  • the film can contain one or more polyvinyl acetals, each having a different polyvinyl alcohol content, degree of acetalisation, residual acetate content, ethylene proportion, molecular weight and/or different chain lengths of the aldehyde of the acetal groups.
  • the aldehydes or keto compounds used for the production of the polyvinyl acetals can be linear or branched (that is to say of the "n” or “iso” type) containing 2 to 10 carbon atoms, which leads to corresponding linear or branched acetal groups.
  • the polyvinyl acetals are referred to accordingly as “polyvinyl (iso)acetals” or “polyvinyl (n)acetals”.
  • the polyvinylacetal used in accordance with the invention results in particular from the reaction of at least one polyvinyl alcohol with one or more aliphatic unbranched keto- compounds containing 2 to 10 carbon atoms.
  • n-butyraldehyde is preferably used, yielding polyvinyl butyral(PVB).
  • the polyvinyl acetal used has preferable a content of polyvinyl acetate groups of 0.1 to 20 mol %, preferably 0.5 to 3 mol %, or 5 to 8 mol %.
  • the polyvinyl alcohol content of the polyvinyl acetal may be between 6 - 26 % by weight, 8 - 24 % by weight, 10 - 22 % by weight, 12 - 21 % by weight, 14 - 20 % by weight, 16 - 19 % by weight and preferably between 16 and 21 % by weight or 10 - 16 % by weight.
  • the film based on polyvinyl acetal preferably contains uncross-linked polyvinyl acetal.
  • the use of cross-linked polyvinyl acetals is also possible.
  • Methods for cross-linking polyvinyl acetals are described, for example, in EP 1527107 B1 and WO 2004/063231 A1 (thermal self-cross-linking of polyvinyl acetals containing carboxyl groups), EP 1606325 A1 (polyvinyl acetals cross-linked with polyaldehydes) and WO 03/020776 A1 (polyvinyl acetal cross-linked with glyoxylic acid).
  • cross-linking with e.g. diisocyanates like toluene diisocyanate (TDI), Methylene diphenyl diisocyanate (MDI) or hexamethylene diisocyanate (HDI) is possible.
  • the film based on polyvinyl acetal may contain a single plasticiser or a mixtures of plasti- cisers.
  • the film is based on polyvinyl acetal and comprises 0 to 10 whgt% or 1 1 - 30 whgt% of at least one plasticizer.
  • films based on polyvinyl acetal comprise 0 to 8 % by weight, 0 to 6 % by weight, 0 to 4 % by weight, 0 to 2 % by weight or even no plasticiser (0.0 % by weight).
  • the films used in accordance with the invention may contain, as plasticizer, one or more compounds selected from the following groups: - esters of polyvalent aliphatic or aromatic acids, for example 1 ,2-cyclohexane dicarboxylic acid diisononyl ester (DINCH), dialkyl adipates, such as dihexyl adipate, dioctyl adipate, hexyl cyclohexyl adipate, mixtures of heptyl adipates and nonyl adipates, diisononyl adipate, heptyl nonyl adipate, and esters of adipic acid with cycloaliphatic ester alcohols or ester alcohols containing ether compounds, dialkyl sebacates, such as dibutyl sebacate, and also esters of sebacic acid with cycloaliphatic ester alcohols or ester alcohols containing ether compounds, esters of phthalic acid, such as
  • the films may contain further additives, such as residual quantities of water, UV absorber, antioxidants, adhesion regulators, optical brighteners or fluorescent substances, stabilisers, colorants, processing aids, inorganic or organic nanoparticles, pyro- genic silicic acid and/or surface active substances.
  • additives may be used in an amount of 0.001 to 1 % by weight.
  • Another object of the invention is a method of producing the transparent electric conductive film as already disclosed by providing a film based on polyvinyl acetal, ionomer or EVA with a coating of electric conductive metallic nanowires by wet coating, printing, or sputtering. Such coating techniques are known to the person skilled in the art.
  • the film based on polyvinyl acetal ionomer or EVA may be subjected to thermal treatment.
  • the substrate (film) melts at least in part on the surface and the coating will in part be embedded in the film and/or the polyvinyl acetal fills cavities or voids of the coating, thereby acting as matrix material.
  • Transparent electric conductive films according to the invention may be used as transparent antenna, in heatable glazing, as electric supply or connector in glazings which change transmission of light upon applying an electric field (smart windows) or in photovoltaic modules or in touchscreen displays or in an organic LED (OLED).

Abstract

The invention is directed to a transparent electric conductive film based on polyvinyl acetal, ionomer or ethylene vinyl acetate comprising at least on one surface with a coating of electric conductive nanowires having an average diameter of 10 to 1000 nm and an average length of 10 to 1000 μm.

Description

Transparent conductive films based on polyvinyl acetal
Today, transparent and electrically conductive PET based films (TC-PET) are used as functional layer for touch screen devices, smart windows or heat-able windows like windshields.
These PET films are subject to mechanical loads during processing, so scratches can occur easily on the surface of such films. These scratches can cause light scattering in the final laminate because the material doesn't melt during lamination. Also surface irregularities can occur during the production of the PET substrates, which are caused by stretching of the material and also lead to light scattering or haze in its final application.
Furthermore, TC-PET films are usually coated with transparent conductive metal oxides like indium tin oxide (ITO) or others, which are very brittle. Hence the resulting film is not flexible and/or the brittle coating delaminates.
Thus, a conventional TC-PET film also is not reliable and leads to disadvantages during transportation and processing of the film. Such PET based films also show poor adhesion to a conventional lamination film based on e.g. polyvinyl butyral (PVB). Hence resulting laminates exhibit poor mechanical properties or call for an adhesion agent. Furthermore, scratches and surface irregularities of PET based films do not disappear during lamination processes due to temperatures below their melting point. Therefore, it would be advantageous to provide a substrate for conductive films having a melting point below standard glass lamination temperatures and adhesion compatibility to e.g. PVB based lamination films coated with a flexible transparent, electrically conductive coating. Accordingly, object of the invention are transparent electric conductive films based on polyvinyl acetal, ionomer or ethylene vinyl acetate (EVA) comprising at least on one surface with a coating of electric conductive, metallic nanowires having an average diameter of 10 to 1000 nm and an average length of 10 to 1000 μιη.
Preferable, the electric conductive metallic nanowires have an average diameter of 10 to 200 nm or 10 - 100 nm and/or an average length of 10 to 100 μιη.
The electric conductive nanowires may comprise or consist of at least of the metals selected from the group consisting of silver (Ag), gold (Au), copper (Cu), aluminum (Al), nickel (Ni), cobalt (Co), platinum (Pt), palladium (Pd), tungsten (Wo) or iron (Fe).
In one embodiment of the invention, the electric conductive nanowires are doped with materials selected from the group consisting of polyaniline, poly(3,4- ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), carbon nanotubes (CNT), carbon nanobuds (CNB), graphene, indium tin oxide (ITO), fluorine tin oxide (FTO), aluminum zinc oxide (AZO), antimony tin oxide (ATO), gallium zinc oxide (GZO), fluorine zinc oxide (FZO). Suitable nanowires can be manufactured according to US7922787 ore are commercially available from Sigma Aldrich, Novarials or Cambrios Technologies Corporation (USA).
The electric conductive metallic nanowires are provided to the film based on polyvinyl acetal, ionomer or ethylene vinyl acetate as coating having a final thickness of 10 nm to 10 μιη, preferably a final thickness of 10 nm to 1 μιη, most preferred a thickness of 10 nm to 500 nm.
The coating of electric conductive metallic nanowires may have a concentration of r 0.001 g - 10 g nanowires per square meter, preferably 0.001 g - 2,5 g nanowires per square meter, most preferred 0.001 g— 1 g nanowires per square meter. The coating may be applied to whole surface film based on polyvinyl acetal, ionomer or ethylene vinyl acetate i.e. covering the surface without voids. In a variant of the invention, the coating is applied to a part of the surface in any form of a surface pattern, like grids, stripes, waves, random or any non-random structure. This pattern may be applied directly or in a second step after applying the coating areal on the whole substrate by removing the coating at undesired surface locations.
Transparent electric conductive film according to invention may be provided with the coating on both sides or wherein a first surface is provided with the conductive coating and a second surface without the conductive coating. In any case, the coating decreases the sheet resistance of the film based on polyvinyl acetal from about 10E10 Ω/D to of 0.1 to 1000 Ω/D. Preferable the sheet resistance of the films according to the invention is 0.1 to 100 Ω/D, more preferred 0.1 to 20 Ω/D.
Since the functionality of the films is applied in form of a very thin coating, the resulting films have a high visible light transmission of at least 80 % measured according to DIN EN 410.
The film according to the invention may have a thickness (including the coating) of 10 μιη to 1500 μιη, preferable a thickness of 10 to 125 μιη and most preferred a thickness of 10 μιη - 60 μιη.
Depending of the use of the final film, the coating may be applied to film based on polyvi- nyl acetal, ionomer or EVA provided with a certain roughness, for example a roughness Rz of 10-0.1 μιη. To avoid optical disturbances, lower roughness like Rz of 5 - 0.1 μιη or even Rz of 2,5 - 0.1 μιη can be advantageous. A lower roughness also leads to a lower specific surface of the substrate. Thus less of the coating material is needed to form the transparent, conductive coating. The roughness Rz of the film based on polyvinyl acetal is measured according to EN ISO 4287.
The polyvinyl acetal used in accordance with the invention contain polyvinyl acetals, which are produced by acetalisation of polyvinyl alcohol or ethylene vinyl alcohol copolymer. The film can contain one or more polyvinyl acetals, each having a different polyvinyl alcohol content, degree of acetalisation, residual acetate content, ethylene proportion, molecular weight and/or different chain lengths of the aldehyde of the acetal groups.
In particular, the aldehydes or keto compounds used for the production of the polyvinyl acetals can be linear or branched (that is to say of the "n" or "iso" type) containing 2 to 10 carbon atoms, which leads to corresponding linear or branched acetal groups. The polyvinyl acetals are referred to accordingly as "polyvinyl (iso)acetals" or "polyvinyl (n)acetals".
The polyvinylacetal used in accordance with the invention results in particular from the reaction of at least one polyvinyl alcohol with one or more aliphatic unbranched keto- compounds containing 2 to 10 carbon atoms. To this end, n-butyraldehyde is preferably used, yielding polyvinyl butyral(PVB).
The polyvinyl acetal used has preferable a content of polyvinyl acetate groups of 0.1 to 20 mol %, preferably 0.5 to 3 mol %, or 5 to 8 mol %. The polyvinyl alcohol content of the polyvinyl acetal may be between 6 - 26 % by weight, 8 - 24 % by weight, 10 - 22 % by weight, 12 - 21 % by weight, 14 - 20 % by weight, 16 - 19 % by weight and preferably between 16 and 21 % by weight or 10 - 16 % by weight.
The film based on polyvinyl acetal preferably contains uncross-linked polyvinyl acetal. The use of cross-linked polyvinyl acetals is also possible. Methods for cross-linking polyvinyl acetals are described, for example, in EP 1527107 B1 and WO 2004/063231 A1 (thermal self-cross-linking of polyvinyl acetals containing carboxyl groups), EP 1606325 A1 (polyvinyl acetals cross-linked with polyaldehydes) and WO 03/020776 A1 (polyvinyl acetal cross-linked with glyoxylic acid). Also cross-linking with e.g. diisocyanates like toluene diisocyanate (TDI), Methylene diphenyl diisocyanate (MDI) or hexamethylene diisocyanate (HDI) is possible.
The film based on polyvinyl acetal may contain a single plasticiser or a mixtures of plasti- cisers.
In further embodiments, the film is based on polyvinyl acetal and comprises 0 to 10 whgt% or 1 1 - 30 whgt% of at least one plasticizer. Preferable, films based on polyvinyl acetal comprise 0 to 8 % by weight, 0 to 6 % by weight, 0 to 4 % by weight, 0 to 2 % by weight or even no plasticiser (0.0 % by weight).
The films used in accordance with the invention may contain, as plasticizer, one or more compounds selected from the following groups: - esters of polyvalent aliphatic or aromatic acids, for example 1 ,2-cyclohexane dicarboxylic acid diisononyl ester (DINCH), dialkyl adipates, such as dihexyl adipate, dioctyl adipate, hexyl cyclohexyl adipate, mixtures of heptyl adipates and nonyl adipates, diisononyl adipate, heptyl nonyl adipate, and esters of adipic acid with cycloaliphatic ester alcohols or ester alcohols containing ether compounds, dialkyl sebacates, such as dibutyl sebacate, and also esters of sebacic acid with cycloaliphatic ester alcohols or ester alcohols containing ether compounds, esters of phthalic acid, such as butyl benzyl phthalate or bis-2-butoxyethyl phthalate, esters or ethers of polyvalent aliphatic or aromatic alcohols or oligo ether glycols with one or more unbranched or branched aliphatic or aromatic substituents, for example esters of glycerol, diglycols, triglycols or tetraglycols with linear or branched aliphatic or cycloaliphatic carboxylic acids; Examples of the latter group include diethylene glycol-bis-(2-ethyl hexanoate), triethylene glycol-bis-(2-ethyl hexanoate), triethylene glycol-bis-(2-ethyl butanoate), tetraethylene glycol-bis-n- heptanoate, triethylene glycol-bis-n-heptanoate, triethylene glycol-bis-n-hexanoate, tetraethylene glycol dimethyl ether and/or dipropylene glycol benzoate, phosphates with aliphatic or aromatic ester alcohols, such as tris(2- ethylhexyl)phosphate (TOF), triethyl phosphate, diphenyl-2-ethylhexyl phosphate, and/or tricresyl phosphate, esters of citric acid, succinic acid and/or fumaric acid. In addition, the films may contain further additives, such as residual quantities of water, UV absorber, antioxidants, adhesion regulators, optical brighteners or fluorescent substances, stabilisers, colorants, processing aids, inorganic or organic nanoparticles, pyro- genic silicic acid and/or surface active substances. Such additives may be used in an amount of 0.001 to 1 % by weight. Another object of the invention is a method of producing the transparent electric conductive film as already disclosed by providing a film based on polyvinyl acetal, ionomer or EVA with a coating of electric conductive metallic nanowires by wet coating, printing, or sputtering. Such coating techniques are known to the person skilled in the art.
After coating the film based on polyvinyl acetal, ionomer or EVA may be subjected to thermal treatment. During this, the substrate (film) melts at least in part on the surface and the coating will in part be embedded in the film and/or the polyvinyl acetal fills cavities or voids of the coating, thereby acting as matrix material.
In both cases, the mechanical loadability of the film is increased making it more flexible and improving its optical properties.
Transparent electric conductive films according to the invention may be used as transparent antenna, in heatable glazing, as electric supply or connector in glazings which change transmission of light upon applying an electric field (smart windows) or in photovoltaic modules or in touchscreen displays or in an organic LED (OLED).

Claims

Claims:
1. Transparent electric conductive film based on polyvinyl acetal, ionomer or ethylene vinyl acetate comprising at least on one surface with a coating of electric conductive metallic nanowires having an average diameter of 10 to 1000 nm and an average length of 10 to 1000 μιη.
2. Transparent electric conductive film according to claim 1 characterized in that the electric conductive nanowires comprise at least of the metals selected from the group consisting of silver (Ag), gold (Au), copper (Cu), aluminum (Al), nickel (Ni), cobalt (Co), platinum (Pt), palladium (Pd), tungsten (Wo) or iron (Fe).
3. Transparent electric conductive film according to claim 1 or 2 characterized in that the electric conductive nanowires are doped with materials selected from the group consisting of polyaniline, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), carbon nanotubes (CNT), carbon nanobuds (CNB), graphene, indium tin oxide (ITO), fluorine tin oxide (FTO), aluminum zinc oxide (AZO), antimony tin oxide (ATO), gallium zinc oxide (GZO), fluorine zinc oxide (FZO).
4. Transparent electric conductive film according to any of the claims 1 to 3 characterized in that the coating has a thickness of 10 nm to 10 μιη.
5. Transparent electric conductive film according to any of the claims 1 to 4 characterized in a sheet resistance of 0.1 to 1000 Ω/D .
6. Transparent electric conductive film according to any of the claims 1 to 5 characterized in that the film is based on polyvinyl acetal and comprises 0 to 10 whgt% of at least one plasticizer.
7. Transparent electric conductive film according to any of the claims 1 to 5 characterized in that the film is based on polyvinyl acetal and comprises 1 1 - 30 whgt% of at least one plasticizer.
8. Transparent electric conductive film according to any of the claims 1 to 7 characterized in a visible light transmission of at least 80 % measured according to DIN EN 410.
9. Transparent electric conductive film according to any of the claims 1 to 8 characterized in a thickness of 10 μιη to 1500 μιη.
10. Transparent electric conductive film according to any of the claims 1 to 9 characterized in that the coating covers the whole surface of the film based on polyvinyl acetal, ionomer or ethylene vinyl acetate.
1 1. Transparent electric conductive film according to any of the claims 1 to 9 characterized in that the coating is applied to a part of the surface in form of a surface pattern.
12. Transparent electric conductive film according to any of the claims 1 to 1 1 characterized in that the film based on polyvinyl acetal, ionomer or ethylene vinyl acetate is provided with a roughness Rz of 10-0.1 μιη.
13. Transparent electric conductive film according to any of the claims 1 to 12 characterized in a first surface provided with the conductive coating and a second surface without the conductive coating.
14. Method of producing the transparent electric conductive film according to claim 1 to 13 by providing a film based on polyvinyl acetal, ionomer or ethylene vinyl acetate with a coating of electric conductive metallic nanowires by wet coating, printing, or sputtering.
PCT/EP2017/054689 2016-03-01 2017-03-01 Transparent conductive films based on polyvinyl acetal WO2017148972A1 (en)

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DE102016103686 2016-03-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220010082A1 (en) * 2018-09-26 2022-01-13 Kuraray Co., Ltd. Method for producing polyvinyl acetal resin film containing plasticizer absorbed therein

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WO2003020776A1 (en) 2001-09-04 2003-03-13 Kuraray Specialities Europe Gmbh High-molecular, crosslinked polyvinyl butyrals, method for the production and use thereof
WO2004063231A1 (en) 2003-01-09 2004-07-29 Kuraray Specialities Europe Gmbh Crosslinked polyvinyl acetals
EP1606325A1 (en) 2003-01-09 2005-12-21 Kuraray Specialities Europe GmbH Crosslinked polyvinly acetals
EP1527107B1 (en) 2002-07-04 2007-06-13 Kuraray Europe GmbH Crosslinked polyvinyl acetals
US7922787B2 (en) 2008-02-02 2011-04-12 Seashell Technology, Llc Methods for the production of silver nanowires
US20130251983A1 (en) * 2012-03-21 2013-09-26 Jnc Corporation Coating forming composition used for forming transparent conductive film
US20150364228A1 (en) * 2014-06-12 2015-12-17 Carestream Health, Inc. Transparent conductive films and compositions
WO2016019422A1 (en) * 2014-08-07 2016-02-11 Flinders Partners Pty Ltd Transparent electrode materials and methods for forming same

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003020776A1 (en) 2001-09-04 2003-03-13 Kuraray Specialities Europe Gmbh High-molecular, crosslinked polyvinyl butyrals, method for the production and use thereof
EP1527107B1 (en) 2002-07-04 2007-06-13 Kuraray Europe GmbH Crosslinked polyvinyl acetals
WO2004063231A1 (en) 2003-01-09 2004-07-29 Kuraray Specialities Europe Gmbh Crosslinked polyvinyl acetals
EP1606325A1 (en) 2003-01-09 2005-12-21 Kuraray Specialities Europe GmbH Crosslinked polyvinly acetals
US7922787B2 (en) 2008-02-02 2011-04-12 Seashell Technology, Llc Methods for the production of silver nanowires
US20130251983A1 (en) * 2012-03-21 2013-09-26 Jnc Corporation Coating forming composition used for forming transparent conductive film
US20150364228A1 (en) * 2014-06-12 2015-12-17 Carestream Health, Inc. Transparent conductive films and compositions
WO2016019422A1 (en) * 2014-08-07 2016-02-11 Flinders Partners Pty Ltd Transparent electrode materials and methods for forming same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220010082A1 (en) * 2018-09-26 2022-01-13 Kuraray Co., Ltd. Method for producing polyvinyl acetal resin film containing plasticizer absorbed therein

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