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Transparent conductive film and composition for forming same

A conductive film, transparent technology, used in conductive materials dispersed in non-conductive inorganic materials, conductive coatings, transportation and packaging, etc., can solve problems such as inappropriate use

Inactive Publication Date: 2005-10-12
MITSUBISHI MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] A transparent conductive film with high electromagnetic wave shielding effect can be formed by vapor deposition methods such as sputtering, but, considering the cost, this process is not suitable for mass production such as TV production

Method used

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  • Transparent conductive film and composition for forming same
  • Transparent conductive film and composition for forming same
  • Transparent conductive film and composition for forming same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0085] The preparation method of transparent conductive film of the present invention

[0086] There is no particular limitation on the preparation method of the transparent conductive film of the double-layer structure of the present invention, for example, the method described below can be used.

[0087] First, a coating material containing fine metal powder and other desired powders (ATO, ITO or black powder) (film-forming composition) for forming an underlayer is coated on a transparent substrate to form a film containing fine metal powder. Coating materials are prepared by dispersing fine metal powders and other optional powders in suitable solvents. Dispersion can be accomplished by conventional equipment used in the preparation of coating materials.

[0088] The coating material forming the base layer may or may not contain a binder consisting of an alkoxysilane which is at least partially pre-hydrolyzed, which after baking can form a binder with a silica matrix. In g...

Embodiment 1

[0208] Example 1 relates to a bilayer film containing black powder prepared using a binder-free coating material forming an undercoat layer.

[0209] Coating materials that form the base coat

[0210] Preparation of silicone-free basecoat-forming coating material: Add fine metal powder and black powder, if desired, to a solvent mixture of isopropanol / 2-isopropoxyethanol in a weight ratio of 80 / 20 , and titanium compound, the types and ratios of the black powder and the titanium compound are listed in Table 1, and the resulting mixture was mixed in a paint mixer with zirconia pellets (0.3 mm in diameter) to disperse the two powders in the solvent . Both the fine metal powder and the black powder have an average primary particle size of up to 0.1 micron in the coating material. The total content of the two powders in the coating material is 0.7-3.2%, and the viscosity of the coating material is 1.0-1.6 cps.

[0211] The symbols for titanium compounds used in Table 1 have the ...

Embodiment 2

[0234] Example 2 relates to the preparation of a bilayer film using a binder-containing undercoat-forming coating material, wherein the undercoat layer contains black powder.

[0235] Coating materials that form the base coat

[0236] The details of this embodiment are the same as those in Example 1, except that tetraethoxysilane (ethyl silicate) is added as a binding agent in an amount of 10 parts by weight relative to 10 parts by weight of fine metal powder and black powder. Parts (converted to silica), and a small amount of hydrochloric acid can be added as a hydrolysis catalyst.

[0237] Coating material forming the top coat

[0238] Same as Example 1

[0239] Film forming method

[0240] The procedure is the same as in Example 1, except that, after the coating material forming the undercoat layer is applied on the substrate by means of a spin coater, the coated substrate is heated at 50° C. for 5 minutes in the open air to Baking of the undercoat layer is completed be...

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Abstract

The present invention discloses a double-layer structured low-resistance and low-reflectiviy transparent conductive film, comprising a fine metal powder and a black powder and a silica-based low-reflectivity layer. The lower layer has irregularities on the surface thereof: the average thickness is within a range of from 50 to 150 nm, and the average thickness is within a range of from 50 to 85% of that of the convex portions, with an average pitch of the convex portions may be within a range of from 20 to 300 nm. The fine metal powder particles are dispersed in a solvent with or without alkoxysilane contained therein. The transparent conductive film of the invention is formed by coating the coating material onto a substrate, drying the coated film, and coating a solution of alkoxysilane or a hydrolyzed product thereof.

Description

technical field [0001] The present invention relates to a low-reflectance and low-resistance transparent conductive film which is a two-layer structure consisting of a bottom layer comprising fine metal powder and a silicon dioxide-based topcoat layer, and to the preparation of the transparent conductive film A composition suitable for preparing the bottom film. The transparent conductive film of the present invention is suitable for imparting various functions to transparent substrates such as cathode ray tubes (CRT) and image display parts of various display units, such as antistatic, electromagnetic wave shielding and antiglare properties (prevention of disturbing reflection). Background technique [0002] Under the action of static electricity, dust is easily deposited on the image display parts (screens) that make up various display units such as cathode ray tubes (CRTs for TVs or displays), plasma displays, EL (electroluminescent) displays, and liquid crystal displays....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22
CPCY10T428/2995H01B1/22Y10T428/2991
Inventor 林年治冈友子西原明
Owner MITSUBISHI MATERIALS CORP
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