JP2859783B2 - Paint for forming antistatic / high refractive index film, transparent material laminate with antistatic / antireflective film and display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint for forming an antistatic / high-refractive-index film, a transparent material laminate having an antistatic / antireflective film obtained by using the same, and a display device . More specifically, the present invention relates to a display surface of a display device, its surface covering material, window glass,
Glass for show window, display surface of TV cathode ray tube,
Various display devices such as the display surface of a liquid crystal device, the cover glass of an instrument, the cover glass of a clock, and the front image surface of a cathode ray tube
Antistatic and high refractive index film forming paint useful for coating the surface of transparent materials that require antistatic and antiglare , such as the display surface of a device, and the antistatic and high A transparent material laminate with an antistatic / antireflective film by a combination of a refractive index film layer and a low refractive index film layer, and having this transparent material laminate, antistatic, electromagnetic shielding,
Table with added functions such as anti-reflection and contrast enhancement
The present invention relates to a display device .

[0002]

2. Description of the Related Art Generally, transparent materials for image display, for example, TV
It is known that static electricity tends to be charged on an image display unit of a cathode ray tube, and this static electricity causes dust to adhere to a display surface. Further, there is also known a problem that external light is reflected on the image display surface, or an external image is reflected on the image display surface, and the image on the display surface becomes unclear.

[0003] In order to solve the above problems, conventionally, a nonaqueous solvent dispersion of fine particles of tin oxide (ATO) doped with antimony and a hydrolysis product of silicon alkoxide is provided on the surface of a transparent substrate. Is applied and dried to form an antistatic film layer, and a low refractive index film layer having a lower refractive index than that is formed on the antistatic film.

[0004] In order to solve the above-mentioned problems, as described above, charging is carried out from a paint comprising a non-aqueous solvent dispersion containing a mixture of antimony-doped tin oxide fine powder and a hydrolysis product of silicon alkoxide (silica). Forming a barrier layer,
Attempts have been made to form a low-refractive-index film layer thereon by applying a coating composed of an aqueous dispersion of a hydrolysis product of silicon alkoxide (silica), but the antireflection effect was not sufficient.

[0005] In addition, the TV cathode ray tube and the computer
The cathode ray tubes that compose the display etc. of red, green,
An electron beam from an electron gun is projected on a phosphor screen that emits blue light.
To project characters and images
You. This cathode ray tube generates an electron beam at high voltage
Cause electromagnetic waves, which can adversely affect the human body and surrounding equipment.
Exert. Also, when the electron beam hits the phosphor,
Static electricity is generated on the front of the face plate.

[0006] To solve these problems,
A transparent conductive oxide film such as indium oxide
Face plate formed by the
Attach to the front of the panel to shield electromagnetic waves,
The antimony-doped tin oxide and a silica-based material such as silica sol
Apply the binder dispersion to the front of the face panel
To form a transparent conductive film.
There is a method to prevent static electricity on the front of the device. Furthermore, the following equation
So, as shown, to increase the contrast,
Contains a coloring agent such as a dye in the antistatic coating solution
Cathode ray tube with antistatic and high contrast
Has also been devised.

[0007] Further, the colored antistatic coating solution is sprayed.
Sprayed onto the face panel to form an uneven film,
A CRT with anti-reflection effect provided by scattering has also been proposed.
Have been.

[0008]

The refractive index of the conventional antistatic film layer is about n = 1.50 to 1.54,
The difference between the refractive index of the low refractive index film layer formed by the hydrolysis product of silicon alkoxide (silica) and the antireflection property of the conventional antistatic film layer and low refractive index film layer is small. Was inadequate.

Further , the transparent conductive material such as indium oxide described above is used.
An electronic film is formed on a face plate by sputtering or evaporation.
Cathode obtained by attaching a sheet to the face panel
Wire tubes are very expensive. Also, use a colored antistatic liquid
Antistatic and optical filters
With a cathode ray tube with a filter, the conductivity is insufficient.
In addition, a sufficient electromagnetic shielding effect cannot be obtained,
Obtained by spraying antistatic coating solution
Cathode wire with antistatic, optical filter and antireflection functions
In the tube, the resolution of the image is extremely high due to the unevenness of the formed film.
There was a problem that it deteriorated.

The present invention provides an antistatic agent having excellent antistatic properties.
High refractive index film-forming coating material, and the band obtained by using the
Combination of antistatic / high refractive index film layer, low refractive index film layer and transparent substrate
Anti-reflection film with a transparent material laminate according to the suit look, Sort
This transparent material laminate has antistatic, electromagnetic shielding, anti-static
Display with additional functions such as anti-sun and contrast enhancement
It is intended to provide a device .

[0011]

The present invention has been found to be able to solve the above problems by mixing a black colored conductive fine powder with an antimony-doped tin oxide fine powder.
It was completed based on it. That is, the paint for forming an antistatic / high-refractive-index film according to the present invention is characterized by comprising a dispersion containing a mixture of antimony-doped tin oxide fine powder and black colored conductive fine powder.

Further, the transparent material laminate with an antistatic / antireflection film according to the present invention comprises a transparent substrate, a fine powder of antimony-doped tin oxide on the surface of the transparent substrate, and a black colored conductive material. An antistatic / high-refractive-index film layer formed by applying and drying a paint made of a dispersion containing a mixture with fine powder,
A low-refractive-index film layer formed on the antistatic / high-refractive-index film layer and having a refractive index lower than the refractive index by 0.1 or more. Change
The display device according to the present invention is an antimony-doped tin oxide.
Including a mixture of fine powder and black colored conductive fine powder
An antistatic formed by applying and drying a paint consisting of a dispersion
On the antistatic / high refractive index film layer and the antistatic / high refractive index film layer
And has a refractive index lower than the refractive index by 0.1 or more.
At least on the display surface
It is characterized by having been done.

[0013] In the mixture of the antimony-doped tin oxide fine powder and the black colored conductive fine powder used in the antistatic / high refractive index film forming coating of the present invention, the content of the black colored conductive fine powder and The content ratio of the antimony-doped tin oxide fine powder is preferably from 1 to 30:70 to 99. When the ratio of the content of the black-colored conductive fine powder to the total weight of the mixture is more than 30/70, the content of the black-colored conductive fine powder becomes excessive, and the transparency of the obtained film layer is significantly reduced. In the case where a laminated film is formed on the display surface of the display device, visibility becomes extremely poor.

On the other hand, if it is less than 1/99, the conductivity of the obtained antistatic / high-refractive-index film layer does not increase, and light absorption hardly occurs. Even if a low refractive index film layer is formed on the layer, only the same antistatic and antireflective effects as those of the related art can be obtained.
It becomes insufficient as an antireflection film. Black-colored conductive fine powder used in the present invention is black, gray, black gray,
Any fine powder having a color tone such as black-brown and having conductivity may be used. For example, oxide fine powders such as carbon black, titanium black, tin sulfide, mercury sulfide, metallic silicon, metallic cobalt, metallic tungsten, and sulfide fine powder
End, such as metallic powder may be used. In particular, carbon black fine powder such as Ketjen black, furnace black and graphite powder is preferable. Hereinafter, a coating for forming an antistatic / high-refractive-index film using carbon black fine powder as the black colored conductive fine powder will be described.

In the conventional antistatic film-forming paint containing no black colored conductive fine powder, the antistatic / high refractive index film layer is made conductive and has a high refractive index only by the antimony-doped tin oxide fine powder. It was something that could be done. However, in the present invention, antimony-doped tin oxide fine powder, even higher conductivity, and a black colored conductive fine powder having a light absorbing ability, for example, by mixing carbon black fine powder, that is, Mixing with conductive fine particles (ATO) + black conductive fine particles, in other words, by adding double conductive fine particles, coating for forming an antistatic and high refractive index film having more excellent double antistatic properties. Preparation of liquid became possible.

Therefore, the antistatic / high-refractive-index film layer obtained by using the coating for forming an antistatic / high-refractive-index film layer of the present invention exhibits an extremely excellent antistatic effect and electromagnetic wave shielding effect. The antistatic / high-refractive-index film layer includes n
In addition to having a high refractive index of 1.55 to 2.0 and reducing the reflected light on the substrate surface,
By providing a low refractive index film layer having a refractive index difference of 0.1 or more, preferably 0.15 or more, extremely excellent antireflection properties are exhibited.

That is, the reflected light from the surface of the low refractive index film layer can be canceled by the interference of the reflected light from the interface with the antistatic / high refractive index film layer having a high refractive index. The carbon black particles present in the film layer can absorb the reflected light at the interface between the antistatic and high refractive index film layers. Thereby, the antireflection effect can be enhanced more than before.

Furthermore, when the combination film of the antistatic / high refractive index film layer and the low refractive index film layer obtained by the present invention is formed on the display surface of a display device such as a cathode ray tube, visibility by antireflection is improved. In addition to the improvement, since the display surface has a black color, the contrast of an image is also improved, whereby a display device having excellent visibility can be obtained.

In the antimony-doped tin oxide fine powder used in the present invention, tin oxide can be obtained by a gas phase method (gasification of the compound, cooling and solidification of the compound in the gas phase), and a CVD method (gasification of component elements, React them in the gas phase and cool and solidify the product) and carbonates (or oxalates)
It may be produced by any known method (for example, denaturation in a gas phase from a carbonate or oxalate of the metal element, followed by cooling and solidification). Further, an aqueous solution of a chloride of a component element and an aqueous solution of a basic compound are mixed and reacted,
An acid-alkali method for producing an ultrafine sol of a target compound, a hydrothermal method for removing a solvent therefrom, and the like can also be used for producing antimony-doped tin oxide fine powder. In the above hydrothermal method, fine particles can be grown, spheroidized, or surface-modified. The shape of the fine particles is not particularly limited, and may be spherical, needle-like, plate-like, or chain-like.

The method of doping antimony with tin oxide and the amount of doped antimony are not particularly limited.
Preferably, it is 5%. Thereby, the tin oxide fine powder can further enhance its antistatic effect, electromagnetic wave shielding effect, and the like.

The antimony-doped tin oxide fine powder used in the present invention preferably has an average particle size of 1 to 100 nm. When the average particle diameter is less than 1 nm, the electric conductivity is reduced, and the particles are easily aggregated, and it is difficult to uniformly disperse the particles in the coating, and the viscosity of the coating increases, and the viscosity is reduced. Therefore, it is necessary to add a large amount of a dispersing solvent, and as a result, the concentration of the antimony-doped tin oxide fine powder in the paint may be excessively low.

When the average particle diameter of the antimony-doped tin oxide fine powder is larger than 100 nm, light is remarkably irregularly reflected by Rayleigh scattering in the obtained antistatic / high refractive index film layer, so that it appears white and the transparency is increased. descend.

The particle size of the carbon black to be used is not particularly limited, but is 1 μm in view of the dispersion stability of the paint.
It is preferable to use one having a particle size of not more than m. Also, in order to disperse the carbon black fine powder, an anionic surfactant, a cationic surfactant, an amphoteric surfactant,
Also, dispersants such as nonionic surfactants can be used.

Further, in order to fix antimony-doped tin oxide particles and carbon black particles on a substrate,
An inorganic binder such as silicone oil or a silicon alkoxide hydrolyzate, or an organic binder such as an acrylic resin, a urethane resin, or an epoxy resin may be added. However, in this case, in order to obtain the desired conductivity, it is necessary to perform a preliminary test in which the weight ratio of (binder) / (conductive powder) is changed, and select an appropriate value.

The dispersant and the binder can be used even when black colored conductive fine particles other than carbon black particles are used. In the laminate of the present invention, the thickness or weight of the antistatic / high refractive index film layer formed on the transparent substrate is not particularly limited, but generally has a thickness of 0.05 to 0.5 μm. preferable.

On the antistatic / high-refractive-index film layer formed by using the coating material of the present invention, a low-refractive-index film layer is formed.
The low-refractive-index film layer is effective for filling voids on the surface of the antistatic / high-refractive-index film layer, suppressing irregular reflection, and improving its friction resistance. The low-refractive-index film layer can be formed by applying a coating composed of a non-aqueous solvent solution containing silicon alkoxide on the antistatic / high-refractive-index film layer, drying the coating, and subjecting it to a baking treatment.

The silicon alkoxide used in the coating material for forming the low refractive index film layer can be selected from tetraalkoxysilane compounds, alkyltrialkoxysilane compounds, dialkyldialkoxysilane compounds, and the like. , Alcohol compounds, glycol ether compounds, ester compounds, ketone compounds and the like. These may be used alone or as a mixture of two or more.

When the above coating material is applied on the antistatic / high refractive index film layer, dried, and baked, the silicon alkoxide hydrolysis product becomes silica. The refractive index of silica is n = 1.46, which is lower than the refractive index of antimony-doped tin oxide. However, in order to increase the refractive index difference between the antistatic / high refractive index film layer and the low refractive index film layer. Is preferably a combination of a substance having a lower refractive index and a higher transparency than silica.

In the present invention, it is preferable that the silicon alkoxide-containing coating material further contains a fine powder of magnesium fluoride (n = 1.38). The content of the magnesium fluoride fine powder in the low-refractive-index film layer is not particularly limited, and can be appropriately adjusted according to the composition of the corresponding antistatic / high-refractive-index film layer. 0.01 to the weight of silicon alkoxide (in terms of SiO ₂ )
Preferably it is within the range of 80%.

The fine magnesium fluoride powder used for forming the low refractive index film layer preferably has an average particle size of 1 to 100 nm. When the average particle size is larger than 100 nm, light is irregularly reflected by Rayleigh scattering in the obtained low refractive index film layer, so that the low refractive index film layer looks whitish and its transparency may be reduced. Further, when the average particle size of the magnesium fluoride fine powder is less than 1 nm, the fine particles are easily aggregated, so that it becomes difficult to uniformly disperse the fine particles in the paint, and there is a problem that the viscosity of the paint becomes excessive. . Further, when the amount of the solvent used is increased in order to lower the viscosity of the paint, there arises a problem that the concentrations of the magnesium fluoride fine powder and the silicon alkoxide in the paint are reduced.

The magnesium fluoride fine powder used in the present invention can be produced by a known method such as a gas phase method, a CVD method, a carbonate or oxalate method. An acid-alkali method for producing an ultrafine sol of the target compound by mixing and reacting an aqueous solution of a fluoride of a component element and an aqueous solution of a basic compound, or a hydrothermal method for removing a solvent therefrom, etc. It can be used for producing powder. In the above hydrothermal method, fine particles can be grown, spheroidized, or surface-modified. Further, the shape of the fine particles may be any of spherical, needle-like, plate-like, and chain-like.

In the present invention, the thickness of the low refractive index film layer is not particularly limited, but preferably has a thickness of 0.05 to 0.5 μm. Since the low-refractive-index film layer having a thickness in the above range is relatively thin, it has an antistatic property.
Even when the high refractive index film layer is coated, the antistatic property and electromagnetic wave shielding property can be sufficiently exhibited as a whole due to the conductivity of the antistatic / high refractive index film layer.

The transparent substrate used in the present invention can be selected from glass materials, plastic materials and the like.

In the display device of the present invention , for example , antimony-doped tin oxide, fine carbon black powder having higher conductivity and light absorbing ability, may be provided on an image display surface (face panel) in front of a cathode ray tube. At least one of graphite fine powder and titanium black fine powder is present at the same time to form a first layer of high refractive index film, on which a silica sol obtained by hydrolyzing a hydrolyzable silicon compound is formed. It is formed by forming a second layer of a low refractive index film.

As described above, the first layer film-forming paint includes antimony-doped oxide fine powder prepared by a known method such as a baking method and a hydrothermal method, and furnace black and Ketjen black. Such as carbon black, graphite fine powder, black colored conductive fine powder such as titanium black, and the like, mixed and dispersed in water or an organic solvent such as alcohol by an ordinary method such as an ultrasonic homogenizer or a sand mill. Is used. Moreover, you may add a dispersing agent as needed.

Here, as to the mixing ratio of antimony-doped tin oxide and black-colored conductive fine powder , as described above, if too much black-colored conductive fine powder is added, the light transmittance of the glass becomes remarkable. As a result, the brightness of the cathode ray tube is significantly reduced. Therefore,
In order to achieve the desired antistatic, electromagnetic shielding, antireflection, and high contrast performance in a well-balanced manner,
Antimony-doped tin oxide / black colored conductive fine powder = 9
9/1 to 70/30 are preferred. Next, as the coating material for forming the second layer of the low refractive index film, any coating material containing a silica sol obtained by hydrolyzing a hydrolyzable silicon compound can be used in terms of surface strength and refractive index. You may.

Specifically, hydrolyzable silicon compounds such as tetramethoxysilane, tetramethoxysilane and methyltrimethoxysilane are converted into alcohols such as methanol, ethanol, propanol and butanol, esters such as ethyl acetate, diethyl ether and the like. To one or more mixed organic solvents such as ethers, ketones, aldehydes, and ethyl cellosolve, and then add water and acid such as hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, and hydrolyze to form silica sol The solution thus obtained can be used as a second layer of a coating material for forming a low refractive index film.

As a method for applying these paints, a spin coating method, a spraying method, a dipping method and the like can be applied. When a film having a uniform film thickness is formed on the cathode ray tube, the spin coating method is preferable. In the first layer film formed by the coating material, antimony-doped tin oxide is further added with a highly conductive black-colored conductive fine powder, so that in addition to an antistatic effect, an electromagnetic wave shielding effect is obtained. Further, an effect of increasing the contrast of an image due to light absorption can be provided. Further, by forming a second layer film having a lower refractive index than the first layer film, an optical anti-reflection effect by a combination of the first layer and the second layer is provided. be able to.

[0039]

The present invention will be described below in more detail with reference to the following examples. It goes without saying that the present invention is not limited to the following examples. (Example 1) (1) A coating material (A) for forming an antistatic / high-refractive-index film layer was prepared as follows (carbon black / antimony-doped tin oxide = 10/90 weight ratio). 1.8 g of antimony-doped tin oxide fine powder (manufactured by Sumitomo Cement) and 0.1 g of antimony-doped tin oxide.
2 g of carbon black fine powder (Mitsubishi Kasei Co., Ltd .: trademark M
A-7) and 0.2 g of an anionic surfactant (Kao Corp .: Poise 521) were added to a mixed solution of 77.8 g of water, 10 g of ethanol, and 10 g of ethylcellosolob, and then added to an ultrasonic homogenizer (Central). The mixture was dispersed for 10 minutes with a Sonicifier 450 (manufactured by Kagakusha) to obtain a uniform dispersion.

(2) A coating material (a) for forming a low refractive index film layer was prepared by the following operation. That is, 0.8 g of tetraethoxysilane, 0.8 g
g of 0.1N hydrochloric acid and 99.2 g of ethyl alcohol were mixed to form a uniform solution.

(3) Production of Laminated Body The coating material (A) was applied on one surface of a glass substrate at a temperature of 40 ° C. by a spin coating method, and dried with hot air of 50 ° C. for 3 minutes. An antistatic / high refractive index film layer having a thickness of 0.1 μm was formed. Next, the coating material (a) is applied on the antistatic / high-refractive-index film layer of this glass substrate at a temperature of 40 ° C. by a spin coating method.
And baked at 150 ° C. for 20 minutes to form a 0.1 μm-thick low-refractive-index film layer.

(4) Test The total light transmittance, the surface resistivity (by a surface resistance meter), and the surface reflectance (using a regular reflection jig having an incident angle of 5 °) of the transparent material laminate obtained as described above. Wavelength 5 by spectrophotometer
The one-sided value of the light reflectance at 50 nm was measured. ) And the adhesion between the antistatic / high-refractive-index film layer and the low-refractive-index film layer (eraser test, load 1 kg, 20 reciprocations).
Table 1 shows the test results.

Example 2 The same operation as in Example 1 was performed. However, the ratio of carbon black / antimony-doped tin oxide in the antistatic / high-refractive-index film-forming coating was 1/99 (weight ratio). Table 1 shows the test results.

Example 3 The same operation as in Example 1 was performed. However, the ratio of carbon black / antimony-doped tin oxide in the antistatic / high-refractive-index film-forming paint was 20/80 (weight ratio). Table 1 shows the test results.

Example 4 The same operation as in Example 1 was performed. However, the ratio of carbon black / antimony-doped tin oxide in the antistatic / high-refractive-index film-forming paint was 30/70 (weight ratio). Table 1 shows the test results.

Example 5 The same operation as in Example 1 was performed. However, instead of the coating material (a) for forming a low refractive index film layer, a coating material (b) prepared as described below was used. That is, 0.4 g of magnesium fluoride fine powder (manufactured by Sumitomo Cement Co., particle size: 10 to 20 nm)
0.6 g tetraethoxysilane, 10 g water, 0.1 g
6 g of 0.1 N hydrochloric acid and 89 g of ethyl alcohol were mixed and uniformly dispersed. Table 1 shows the test results.

Comparative Example 1 The same operation as in Example 1 was performed. However, the ratio of carbon black / antimony-doped tin oxide in the antistatic / high-refractive-index film-forming paint was set at 0/100 (weight ratio). That is,
It did not contain carbon black fine powder. Table 1 shows the test results. Comparative Example 2 The same operation as in Example 2 was performed. However, the ratio of carbon black / antimony-doped tin oxide in the antistatic / high-refractive-index film-forming coating was 40/60 (weight ratio). Table 1 shows the test results.

[0048]

[Table 1]

As is clear from the test results shown in Table 1, the dispersion containing a mixture comprising a transparent substrate, 70 to 99 parts by weight of antimony-doped tin oxide fine powder and 1 to 30 parts by weight of carbon black fine powder. An antistatic / high-refractive-index film layer formed from an antistatic / high-refractive-index film-forming coating composed of a liquid, and formed on this antistatic / high-refractive-index film layer;
And a low-refractive-index film layer having a refractive index lower than the refractive index by 0.1 or more. The transparent material laminate with an antistatic / anti-reflective film comprises a display surface of a display device, a surface cover material thereof, and a window. Glass, glass for show windows, T
As a display surface of a V-CRT, a display surface of a liquid crystal device, a cover glass of an instrument, a cover glass of a watch, and a front image surface of a CRT, it has sufficient light transmittance, low surface resistance and reflectance, and is sufficiently practical. It has a double antistatic function and antireflection function having a certain function.

Also, by dispersing and containing magnesium fluoride fine powder in the low refractive index film layer, it is possible to prevent static electricity.
The antireflection function of the transparent material laminate with the antireflection film can be improved. An embodiment of a cathode ray tube will be described below as an example of a display device of the present invention.

Example 6 A coating solution having the following composition was prepared. a, First layer film forming coating antimony-doped tin oxide fine powder (manufactured by Sumitomo Cement Co.) 1.8 g carbon black fine powder (manufactured by Mitsubishi Kasei Corporation: trademark MA-7) 0.2 g dispersant (manufactured by Kao Corporation: Trademark Poise 521) 0.2 g water 77.8 g ethanol 10 g ethyl cellosolve 10 g

[0052] b, coating liquid for forming the second layer film  3.5 g of tetraethoxysilane  0.8 g of 1N hydrochloric acid  95.7 g of ethanol

C, Method for Forming Film on Cathode Ray Tube The above-mentioned coating solution for forming a first layer film is coated on the front surface of a face panel of a 14-inch TV cathode ray tube (cathode ray tube) panel by a spin coating method (150 rpm × 60 sec). Table 1
As shown in (1), a first layer film was formed on the face panel of the cathode ray tube 1. Next, the coating liquid for forming the second layer film was coated in the same manner by a spin coating method (150 rpm × 30 sec) to form a second layer film on the first layer film. Thereafter, the panel was placed in a furnace at 160 ° C. for 30 minutes and fired to form a coating on the face panel.

That is, as shown in FIG.
The first layer film 3 was formed on the front surface of the face panel 2 described above, and the second layer film 4 was formed on the first layer film 3. Note that reference numeral 5
Indicates a neck of the cathode ray tube, and reference numeral 6 indicates an electron gun. For the obtained cathode ray tube, the surface resistivity, the total light transmittance, the reflectance, the adhesion (eraser test, load 1 kg 20
Table 2). Table 2 shows Comparative Example 3 in which a coating was formed on a cathode ray tube as described above using a coating solution obtained by removing the carbon black fine powder from the coating solution for forming the first layer film.

[0055]

[Table 2]

As shown in Table 2, the cathode ray tube of this embodiment
Of the face panel has higher surface resistance and reflectance than the comparative example
Low, sufficient antistatic effect, electromagnetic wave shielding effect, anti-
Has an anti-radiation effect. Table 2 shows the data
Shown as a decrease in total light transmittance for the comparative example
However, in the actual screen display, the improvement in contrast
Admitted.

[0057]

The paint for forming an antistatic / high-refractive-index film according to the present invention makes it possible to easily form a film layer having excellent antistatic properties and a high refractive index on a transparent substrate. In particular, by combining a low-refractive-index layer with an antistatic / high-refractive-index film layer obtained using this, it is possible to provide a transparent material laminate with an antistatic / anti-reflective film having excellent practical performance. Became.

That is, by using a paint containing antimony-doped tin oxide fine powder and a black colored conductive fine powder, that is, a paint containing two kinds of conductive fine particles, a high antistatic function and a high refractive index are obtained. An antistatic / high-refractive-index film layer having the following characteristics can be obtained. By combining the antistatic / high refractive index film layer and the low refractive index layer, a transparent material laminate with an antistatic / antireflective film having excellent antistatic properties and antireflective properties can be obtained.

The display device of the present invention has at least
On the display surface, an antistatic / high-refractive-index film layer is formed with a paint in which antimony-doped tin oxide fine powder and a highly conductive black coloring conductive fine powder are simultaneously present.
By forming a low-refractive-index film layer, it is possible to impart an antistatic effect, an electromagnetic wave shielding effect, an antireflection effect, and a high contrast effect.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a cathode ray tube (TV CRT) according to a sixth embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 1 cathode ray tube 2 face panel 3 first layer film 4 second layer film

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI C09D 1/00 C09D 1/00 5/24 5/24 H04N 5/72 H04N 5/72 A // G02B 1/11 G02B 1 / 10 A (72) Inventor Ken Uehara 585 Toyotomi-cho, Funabashi-shi, Chiba Sumitomo Cement Co., Ltd. Central Research Laboratory (58) Field surveyed (Int. Cl. ⁶ , DB name) C09D 5/00 C09D 5/24 C09D 1/00

Claims (8)

(57) [Claims] An antistatic and high refractive index dispersion comprising a mixture of 70 to 99 parts by weight of antimony-doped tin oxide fine powder doped with antimony and 1 to 30 parts by weight of a black colored conductive fine powder. Paint for film formation. 2. The black colored conductive fine powder is a carbon black fine powder , a titanium black fine powder, a metal silicon fine powder.
Fine powder, tin sulfide fine powder, mercury sulfide fine powder, metal Kobal
Or a group consisting of fine powder of tungsten and fine powder of metallic tungsten
2. The coating for forming an antistatic / high-refractive-index film according to claim 1, wherein the coating is at least one member selected from the group consisting of: 3. The antimony-doped tin oxide fine powder is 1
Claims, characterized in that having an average particle size of ~100nm
3. The coating material for forming an antistatic / high-refractive-index film according to claim 1 or 2 . 4. A transparent substrate, and on the surface of the transparent substrate,
Applying the coating for forming an antistatic / high-refractive-index film according to claim 1.
Cloth, dried antistatic / high refractive index film layer, and formed on this antistatic / high refractive index film layer and its antistatic
-A transparent material laminate with an antistatic / antireflection film, comprising: a low refractive index film layer having a refractive index lower than the refractive index of the high refractive index film layer by 0.1 or more. Wherein said low refractive index film layer, coating a low refractive index film-forming coating material containing silicon alkoxide and a non-aqueous solvent in the antistatic and high refractive index film layer, and dried, to which baking treatment
5. The method according to claim 4, wherein the material is formed by applying a treatment.
A transparent material laminate with an antistatic / antireflective film described above. 6. The coating composition for forming a low refractive index film further comprises
Characterized in that magnesium nitride fine powder is dispersed
The transparent material laminate with an antistatic / antireflection film according to claim 5 . 7. An average particle of the magnesium fluoride fine powder.
7. The method according to claim 6, wherein the diameter is 1 to 100 nm.
A transparent material laminate with an antistatic / antireflective film described above. Claim 8. 2. An antistatic / high refractive index film according to claim 1.
An antistatic / high refractive index film layer formed by applying and drying a coating composition
And formed on this antistatic / high refractive index film layer And
0.1 or more than the refractive index of the antistatic / high refractive index film layer
A low refractive index film layer having a low refractive index
A display device formed on a surface.