KR100347666B1 - Transparent antistatic wear resistant coating composition and preparation method thereof - Google Patents

Abstract

(A) 5-75% by weight of aqueous colloidal silica at pH 2-11, 20 to 85% by weight of hydrolyzates or partial condensates of the organosilanes of Formula 1 and at least one conductive particulate, based on the total solids in the base resin dispersion A basic resin comprising 25 to 60% by weight of a conductive particulate dispersion of an aqueous dispersion or an alcohol dispersion containing (i) a dispersion stabilizer containing at least one zirconium compound of formula (2) or (3), (c) a thermosetting catalyst, and ( D) The coating composition containing 10 to 50 parts by weight of alcohols of C ₁ -C ₄ with respect to 100 parts by weight of the basic resin is excellent in storage stability, abrasion resistance, solvent resistance, hot water resistance and salt water resistance, and particularly antistatic property. It is possible to provide a transparent antistatic wear resistant coating film which is excellent in preventing adhesion of pollutants such as soot and dust.

[Formula 1]

R ¹ _a Si (OR ² ) _4-a

[Formula 2]

Zr ₄ O (OPr ⁿ ) ₁₀ (acac) ₄

[Formula 3]

Zr ₁₀ O ₆ (OH) ₄ (OPr ⁿ ) ₁₈ (AA) ₆

In the above formula, R ¹ and R ² are each independently selected from the group consisting of C ₁ -C ₆ alkyl group, alkenyl group, halogenated alkyl group and aryl group, a is an integer of 0 to 3, Pr is propyl, acac is Acetylacetone, AA is acetylacetonate, and n is an integer of 1 or more.

Description

Transparent antistatic wear resistant coating composition and preparation method thereof

[Industrial use]

The present invention relates to an antistatic wear resistant coating composition, and more particularly, to a silicone based coating composition capable of forming a film showing both antistatic properties and wear resistance on a surface layer when applied on a solid substrate such as plastic and thermally cured It is about a method.

[Prior art]

Transparent plastic materials are used as a substitute for glass in many fields because of their light weight and excellent rupture resistance, especially in optical lenses, industrial safety glasses, computer safety glasses or goggles. Many applications have been made in large structures such as transport windows such as airplanes, windows of large buildings, greenhouse walls or transparent soundproof walls. Polycarbonate, acrylic or polyethylene terephthalate is mainly used as such transparent plastics, and since these transparent plastic materials have a soft surface, most of them have a disadvantage of being easily scratched. Therefore, many restrictions are applied to applications such as transparent soundproof walls. Will be given.

In order to overcome these disadvantages, a protective film is generally formed on the surface of the plastic material by using an organic material or a silicone coating material. As a coating agent commonly used for this purpose, hydrolysis of silica, such as colloidal silica or silica gel, with hydrolysis of alcohol, water, etc. Scratch-resistant coatings formed by mixing with silane capable of hydrolysis in a medium are known. Examples of such compositions include US Pat. Nos. 3,708,225, 3,986,997, 3,976,497 and 4,177,315, and the like, and coating compositions that provide better coatings are described in US Pat. Nos. 964,910 and 964,911. have.

However, since the coating composition according to the patent is intended only for abrasion resistance, the coating film obtained by the composition easily loses its transparency due to various contaminants such as soot or dust when used outdoors, and thus requires frequent cleaning, and thus damage to the coating film. There is a problem that the usage period is reduced.

Examples of compositions for forming antistatic coatings for the purpose of solving the problems caused by such contamination are described in US Pat. Nos. 5,256,484, 5,382,383, and Japanese Patent Laid-Open No. 54613/1989 and the like. However, the coating composition according to this technique is inferior in wear resistance, and easily damaged by an organic solvent.

The present invention is to solve the problems of the prior art as described above, the object of the present invention is applied to the surface of most plastic substrates without a separate pretreatment process, showing excellent adhesion, wear resistance, alkali resistance, solvent resistance, hot water resistance To provide an antistatic abrasion resistant coating composition excellent in salt water resistance and in particular antistatic properties.

1 is a structure of Zr ₄ O (OPr ⁿ ) ₁₀ (acac) ₄ of Chemical Formula 2.

2 is a structure of Zr ₁₀ O ₆ (OH) ₄ (OPr ⁿ ) ₁₈ (AA) ₆ of Chemical Formula 3.

[Means for solving the problem]

In order to achieve the above object, the present invention provides (a) 5-75% by weight of an aqueous colloidal silica of pH 2-11, based on the total solids in the basic resin dispersion, the hydrolyzate or partial condensate 20 of the organosilane of formula 1 A base resin comprising from 25 to 60% by weight of a conductive particulate dispersion of an aqueous dispersion or an alcohol dispersion containing from 85% by weight to at least one conductive fine particle, and (b) containing at least one zirconium compound of formula (2) or (3) dispersion stabilizers, (c) a thermosetting catalyst, and (d) relative to 100 parts by weight of the base resin, there is provided a coating composition comprising a C ₁ -C ₄ alcohols from 10 to 50 parts by weight.

[Formula 1]

R ¹ _a Si (OR ² ) _4-a

[Formula 2]

Zr ₄ O (OPr ⁿ ) ₁₀ (acac) ₄

[Formula 3]

Zr ₁₀ O ₆ (OH) ₄ (OPr ⁿ ) ₁₈ (AA) ₆

In the above formula, R ¹ and R ² are each independently selected from the group consisting of C ₁ -C ₆ alkyl group, alkenyl group, halogenated alkyl group and aryl group, a is an integer of 0 to 3, Pr is propyl, acac is Acetylacetone, AA is acetylacetonate, and n is an integer of 1 or more.

In addition, the present invention is the step of adjusting the pH to 3-5 by adding a hydrolysis catalyst to the aqueous colloidal silica, the hydrolysis and condensation reaction by mixing the alkoxysilane to the silica, by adding a lower alcohol to the reaction product Preparing an intermediate composition, adding a thermosetting catalyst to the intermediate composition, adjusting the pH of the intermediate composition to which the catalyst is added to prepare a matrix composition, and converting the conductive particulate dispersion into a zirconium compound solution. It provides a method for producing a coating composition comprising the step of stabilizing and mixing the matrix composition and the conductive particulate dispersion to impart antistatic properties to the final composition.

Hereinafter, the present invention will be described in more detail.

The first component of the basic resin dispersion, colloidal silica of pH 2-11 in the composition of the present invention is a sol or stable dispersion of amorphous silica particles having a particle diameter of 5 to 100 nm in general, Ludox, USA Examples include products sold under the trade names of DuPont) or Snowtex (Nissan Chemical, Japan). The size of the colloidal silica particles used in the composition of the present invention is preferably 10 to 40nm in consideration of the pH control and storage stability of the dispersion, the content is 5-75% by weight based on the total solids weight of the base resin It is preferably 10-25% by weight.

The second component of the base resin dispersion is the hydrolyzate or partial condensate of the organosilane compound of formula (1). In the organosilane compound represented by the formula (1), when the alkyl group R ₁ is long, the flexibility of the coating film is improved while the resulting coating film is soft and the wear resistance is lowered. Therefore, when a is 1 or more, it is most preferable that R ¹ is a methyl group. If necessary, a compound in which the alkyl group is a methyl group and a compound in which the alkyl group is another radical may be used in combination, but the number of moles of the silane compound in which the alkyl group is a methyl group must be greater than or equal to the number of moles of the remaining silane compounds. Moreover, when a is 0, it is preferable that R <^2> is a _C1-6 alkyl group.

[Formula 1]

R ¹ _a Si (OR ² ) _4-a

In the formula, R ¹ and R ² are each independently selected from the group consisting of an alkyl group, an alkenyl group, a halogenated alkyl group and an aryl group of C ₁ -C ₆ , and a is an integer of 0 to 3.

The organosilane compound uses 20-85% by weight based on the total solids in the basic resin dispersion, preferably 25-60% by weight. The organosilane compounds used in the present invention are methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, phenyltrimethoxysilane, tetra Methoxysilane, tetraethoxysilane, tetraphenoxysilane, methyltriisopropoxysilane, tetrapropoxysilane, vinyl triisopropoxy silane and the like.

The intermediate composition obtained from the mixture of the hydrolyzate or partial condensate of the above colloidal silica and organosilane compound forms a matrix of the coating film.

The conductive particulate dispersion, the third component of the base resin, is typically an antimony-doped tin oxide (ATO) or indium-doped tin (ITO) doped with an antimony-doped tin oxide having a particle diameter of 5 to 400 nm. oxide, antimony-doped zinc oxide (AZO), or a stable dispersion of one or more mixtures of vanadium pentoxide, such as TiDL (TDL, Mitsubishi Material Japan), SEN (SN, Japan Ishihara Corporation) Or a product sold by Celnax (Nissan Chemical, Japan).

It is preferable that such conductive fine particles have an average particle diameter of 80 nm or less, and at least 60% or more of all particles having a particle diameter of 100 nm or less in order not to lower the transmittance of the coating film. The content of the conductive particulate dispersion is 25 to 60% by weight, preferably 30 to 50% by weight, based on the total solids weight of the base resin.

Since the colloidal silica used in the present invention is an aqueous sol, and the composition of the present invention is an aqueous-alcoholic dispersion, a basic resin dispersion is prepared in an aqueous medium, and alcohol is an essential component of the solvent system because of the nature of the starting material.

The coating composition of the present invention is characterized by providing an antistatic function by making the coating film conductive by using conductive fine particles. However, since the dispersions of the conductive fine particles are very unstable and cannot be directly added to the base resin, the dispersion fine particles are stabilized using a dispersion stabilizer, which is a zirconium compound of Formula 2 or 3, to prevent coagulation between the compositions. At this time, the structure of the compound of Formula 2 is as shown in Figure 1 (ZA-M: CR Academ, Sci. Paris 311, 1161, 1990), the structure of the compound of Formula 3 is shown in Figure 2 (ZB-M : Mater. Res. Soc. Symp. Proc., 272, 3, 1992).

[Formula 2]

Zr ₄ O (OPr ⁿ ) ₁₀ (acac) ₄

[Formula 3]

Zr ₁₀ O ₆ (OH) ₄ (OPr ⁿ ) ₁₈ (AA) ₆

In the formula, Pr is propyl, acac is acetylacetone, AA is acetylacetonate, and n is an integer of 1 or more.

These dispersion stabilizers are used by dissolving at least one zirconium alkoxide or zirconium alkoxy acetonate in an alcohol solvent, followed by stirring and adding the conductive particulate dispersion, wherein the concentration of the dispersion stabilizer is 1-50% by weight, preferably 2 Dilute to -30% by weight. The ratio of the conductive particles in the solids present in the composition to the dispersion stabilizer converted into zirconium oxide (ZrO ₂ ) is preferably 1-5. If the ratio is less than 1, precipitation of the composition may occur due to aggregation of the conductive fine particles, or the transmittance and conductivity of the coating film may be reduced. If the ratio is more than 5, the wear resistance and adhesion of the coating film may be deteriorated. Since the conductive particulate dispersion stabilized in this way is still inferior in stability even after stabilization using a dispersion stabilizer, care must be taken when mixing with an intermediate composition prepared using colloidal silica and an organosilane compound.

Therefore, the present invention uses a method of adjusting the pH in two stages when preparing the matrix composition so that the conductive particulate dispersion can be stably mixed with the intermediate composition.

In step 1, the pH was adjusted to 3-5 by adding an appropriate amount of acid or base as a hydrolysis catalyst to the aqueous colloidal silica, and then alkoxy silane was mixed for 2 to 5 hours in a temperature range of 20 to 60 ° C, and After the condensation reaction, alcohol such as methanol, ethanol, isopropanol or butanol is added to prepare a matrix intermediate composition having a solid content of 20 to 40% by weight. The intermediate composition prepared according to this method has a pH of 4.5-6, and the hydrolysis catalyst used in this step includes acid catalyst series acetic acid, phosphoric acid, sulfuric acid, hydrochloric acid, nitric acid, fluoric acid, oxalic acid, chlorosulphonic acid, Para-toluenesulphonic acid, trichloroacetic acid, iodic acid, iodide anhydride, perchloric acid and the like, and base caustic soda, potassium hydroxide, normal butylamine, di-normalbutylamine, imidazole, ammonium perchlorate, and the like. It can be used individually or in mixture of 2 or more types.

A thermosetting catalyst is added to the intermediate composition prepared according to this method, which is diluted to about 10% by weight with respect to the soluble solvent, and the intermediate composition is added in small portions with stirring to prevent local gelation. Thermosetting catalysts include alkali metal salts of carboxylic acids such as sodium acetate and potassium formate, amine carboxylates such as dimethylamine acetate, ethanolamine acetate, dimethylaniline formate, tetramethylammonium acetate, benzyltrimethyl ammonium acetate, ethanoltrimethyl acetate Quaternary ammonium carboxylates such as (choline acetate), metal carboxylates such as tin octoate, amines such as triethylamine, triethanolamine, pyridine and the like are used.

Next, acetic acid, phosphoric acid, sulfuric acid, hydrochloric acid, nitric acid, fluoric acid, oxalic acid, chlorosulphonic acid, para-toluenesulphonic acid, trichloroacetic acid, iodic acid, iodic anhydride, The pH is adjusted to 1-3 by addition of an acid such as perchloric acid. The final composition is prepared by adding a conductive particulate dispersion with appropriate stirring of the pH controlled matrix composition. At this time, the matrix composition does not have any influence on the dispersion stability of the conductive fine particles, and thus no aggregation occurs when mixing the two intermediate materials.

As described above, the amount of C ₁ -C ₄ alcohol added when preparing the composition of the present invention is preferably 10 to 50 parts by weight based on 100 parts by weight of the basic resin dispersion, and the applicability, adhesion, Methanol, ethanol, isopropyl alcohol, butanol, diacetone alcohol, methyl cellosolve, ethyl cellosolve, butyl cellosolve, cellosolve acetate, methyl ethyl ketone, methyl isobutyl ketone, etc. The organic solvent of can be added.

In addition, the antistatic wear-resistant coating composition of the present invention may be used in various additives in the range that the effect of the present invention is not reduced in order to improve the adhesion to the substrate, workability, antireflection and the like. Examples thereof include ultraviolet absorbers such as polyolefin epoxy resins, cyclohexane oxides, polyglycidyl esters, bisphenol A epoxy resins, epoxy acrylate resins or benzophenones, benzotriazoles, and phenols. In addition, various surfactants may be blended in order to improve applicability, and typical examples thereof include block copolymers, graft copolymers or fluorine-based surfactants of dimethylsiloxane and polyether.

The antistatic wear resistant coating composition of the present invention is applied to various plastic substrates and heat treated to obtain a conductive hard coating having high conductivity, in which case the coating method is silk screen, roll coating, spray coating, deposition coating or spin coating. Although generally used, the curing conditions vary slightly depending on the blending ratio and components, but in general, a protective film having a desired hardness can be obtained by curing at a temperature below the softening point of the substrate (60-150 ° C.) for 20 minutes to several hours. . In addition, the surface resistance and the hardness of the coating film, which are indicative of antistatic properties, vary depending on the mixing ratio, but generally 10 ¹¹ Ω /? It has less surface resistivity and surface hardness is maintained above 3H.

EXAMPLE

The following presents preferred examples and comparative examples to aid in understanding the invention. However, the following examples are merely provided to more easily understand the present invention, and the present invention is not limited to the following examples.

Example 1

While maintaining the temperature inside the reactor, 22 g of Dupont's colloidal silica product AS-40 (22 nm in diameter) was added thereto, 2 g of acetic acid was added thereto, and 22.5 g of methyltrimethoxysilane was added dropwise while stirring, followed by stirring for 5 hours. The decomposition and condensation reactions were carried out. 7 g of isopropyl alcohol and 6.4 g of ethanol were added to the mixture, and 1.135 g of an isopropyl alcohol solution containing 10% by weight of choline acetate was added and stirred well. To this solution was added 5 g of a methanol solution in which 10% by weight of nitric acid was dissolved to adjust the pH to 1.5 to prepare a matrix composition.

Into a separate reactor, 40 g of TDL-G, a conductive fine particle dispersion of Mitsubishi Materials, and 20 g of SN-100D, manufactured by Ishihara Sangyo, were added dropwise while stirring and 40 g of a methanol solution containing 8% zirconium acetylacetonate was added dropwise for 3 hours. The reaction was advanced.

The matrix composition and the conductive fine particle dispersion solution obtained above were mixed well with stirring for 3 hours, and 5 g of methyl cellosolve was added to the reaction mixture to stir well to obtain a final composition.

The composition was partially coated on a polycarbonate (PC) and polymethyl methacrylate (PMMA) substrate surface at a spray pressure of 2 kg / cm 2 using a 0.8 mm nozzle, dried at room temperature for 3 minutes, and then 125 ° C. and 85 ° C., respectively. Cured for 30 minutes at ℃.

Example 2

Except for using methyltriethoxysilane instead of methyltrimethoxysilane in Example 1 was prepared in the same manner as in Example 1.

Example 3

Except for using tetraethoxysilane instead of methyl trimethoxysilane in Example 1 was prepared in the same manner as in Example 1.

Example 4

In Example 1, except that 50:50 mixture of methyl trimethoxysilane and tetraethoxysilane was used instead of methyltrimethoxysilane, and was prepared in the same manner as in Example 1.

Example 5

Except for using the TDL-G instead of a mixture of TDL-G and SN-100D as a conductive particulate dispersion in Example 1 was prepared in the same manner as in Example 1.

Example 6

Except for using only the SN-100D instead of a mixture of TDL-G and SN-100D as a conductive particulate dispersion in Example 1 was prepared in the same manner as in Example 1.

Example 7

Except for using the Celnax-F1-M Nissan Chemical instead of a mixture of TDL-G and SN-100D as a conductive particulate dispersion in Example 1 was prepared in the same manner as in Example 1.

Example 8

Except for using colloidal silica in Example 1 instead of DuPont's AS-40 ST-40 Nippon Chemical's ST-40 was prepared in the same manner as in Example 1.

Example 9

Except for changing the pH of the matrix composition in Example 1 was prepared in the same manner as in Example 1.

Comparative Example 1-3

It was prepared in the same manner as in Example 1 except that the pH of the matrix composition in Example 1 was adjusted to 0.8, 3.5, 6, respectively.

Comparative Example 4

Except for using methyltrimethoxysilane instead of methyltrimethoxysilane in Example 1 was prepared in the same manner as in Example 1.

Comparative Example 5

Except for using 40g of methanol solution in which 8% zirconium acetylacetonate was dissolved in Example 1, except that 30g of ethanol was added to 4g of methanol solution in which 8% zirconium acetylacetonate was dissolved and used. It prepared in the same manner as 1.

Comparative Example 6

Except for using 8% instead of 8% 60% zirconium acetylacetonate methanol solution was prepared in the same manner as in Example 1.

The characteristics of the coating film prepared by the method of the above Examples and Comparative Examples were evaluated according to the following method is shown in Table 1 and Table 2, respectively.

(1) storage stability

It was evaluated by the presence or absence of precipitation of the composition according to the storage period at 25 ℃ and the change in the surface resistance of the coating film at 1 month storage at 25 ℃. 1 represents a slight change in resistance, and 2 represents a significant change.

(2) appearance

The film after hardening was visually observed to confirm the occurrence of pinholes or cracks.

(3) antistatic

The surface resistance of the coating film after curing was measured and evaluated. The lower the resistance, the better the antistatic performance.

(4) transmittance

It was judged by observing the transmittance in the visible light region of the film after curing.

(5) wear resistance

It was determined by measuring the quantitative value (Δ% Haze) of the cloudiness of the coating composition according to ASTM D-1044 and ASTM D-1003.

(6) scratch resistance

Tie the # 0000 steel wool to 1 kg of hammer and rub the workpiece 20 times to indicate that there are 1 scratches, 2 slightly, and 3 severe.

(7) adhesion

According to ASTM D3359, 100 squares were formed by spaces on the film at 1 mm intervals, and five peel tests were performed using a cello tape having a width of 24 mm from Nichiban, Japan to determine the number of strips.

(8) solvent resistance

After rubbing 100 times with cotton soaked in isopropyl alcohol and acetone, it was judged by visual inspection.

(9) hot water resistance

After the coating object was immersed in 60 degreeC warm water for 48 hours, the coating film was cracked externally and the adhesion test was done.

(10) saline resistance

The object was dipped in 10% brine for 10 days and then subjected to an adhesion test.

Example One 2 3 4 5 6 7 8 9 Storage stability Precipitation occurrence radish radish radish radish radish radish radish radish 30 days Resistance change One One One One One One One One - Exterior Pinhole radish radish radish radish radish radish radish radish radish crack radish radish radish radish radish radish radish radish radish Surface resistance (Ω /?) × 10 ⁹ 2.4 3.2 1.1 2.0 5.0 0.86 9.7 2.6 5.3 Transmittance (%) 92 92 93 92 94 91 90 92 90 Adhesion PC 100/100 100/100 100/100 100/100 100/100 100/100 100/100 100/100 95/100 PMMA 100/100 100/100 100/100 100/100 100/100 100/100 100/100 100/100 100/100 Wear resistance PC 3.9 3.9 3.5 3.4 3.5 4.3 4.7 3.9 4.9 PMMA 3.4 3.4 2.9 2.7 3.0 3.2 3.5 3.5 2.9 Scratch resistance PC One One One One One 2 2 One 2 PMMA One One One One One One One One One Solvent resistance no problem no problem no problem no problem no problem no problem no problem no problem no problem Hot water resistance crack radish radish radish radish radish radish radish radish Micro Adhesion 100/100 100/100 100/100 100/100 100/100 100/100 100/100 100/100 85/100 Saline resistance no problem no problem no problem no problem no problem no problem no problem no problem no problem

PC: polycarbonate, PMMA: polymethyl methacrylate

Comparative example One 2 3 4 5 6 Storage stability Precipitation occurrence radish 10 days 12 hours radish 6 hours radish Resistance change One - - 2 - One Exterior Pinhole radish radish U radish U radish crack radish U U radish U radish Surface resistance (Ω /?) × 10 ⁹ 7.8 6.4 350 12 57 2.2 Transmittance (%) 92 88 83 92 80 92 Adhesion PC 100/100 60/100 50/100 100/100 20/100 100/100 PMMA 100/100 80/100 60/100 100/100 20/100 100/100 Wear resistance PC 5.5 5.8 7.2 5.6 8.3 6.2 PMMA 4.9 5.2 6.3 4.6 7.0 5.5 Scratch resistance PC 2 2 3 3 3 2 PMMA 2 2 2 2 3 2 Solvent resistance no problem no problem no problem no problem no problem no problem Hot water resistance crack radish U Peeling radish Peeling radish Adhesion 100/100 0/100 - 100/100 - 100/100 Saline resistance no problem no problem no problem no problem no problem no problem

PC: polycarbonate, PMMA: polymethyl methacrylate

The composition of the present invention is excellent in storage stability, abrasion resistance, solvent resistance, hot water resistance and salt water resistance, and particularly excellent in antistatic property, so that polycarbonate, acrylic, polydiethylene glycol bisaryl carbonate (CR-39) and polyethylene terephthalate It is possible to provide a wear-resistant coating film having excellent antistatic property that can be commonly applied to most transparent plastic substrates such as to prevent adhesion of pollutants such as soot and dust.

Claims (12)

(A) 5-75% by weight of aqueous colloidal silica at pH 2-11, 20 to 85% by weight of hydrolyzates or partial condensates of the organosilanes of Formula 1 and at least one conductive particulate, based on the total solids in the base resin dispersion Basic resin containing 25 to 60% by weight of a conductive particulate dispersion of water dispersion or alcohol dispersion containing; (B) a dispersion stabilizer containing at least one zirconium compound of formula (2) or (3); (C) thermosetting catalysts; And (D) 10 to 50 parts by weight of C ₁ -C ₄ alcohols based on 100 parts by weight of the base resin; Coating composition comprising. [Formula 1] R ¹ _a Si (OR ² ) _4-a [Formula 2] Zr ₄ O (OPr ⁿ ) ₁₀ (acac) ₄ [Formula 3] Zr ₁₀ O ₆ (OH) ₄ (OPr ⁿ ) ₁₈ (AA) ₆ In the above formula, R ¹ and R ² are each independently selected from the group consisting of C ₁ -C ₆ alkyl group, alkenyl group, halogenated alkyl group and aryl group, a is an integer of 0 to 3, Pr is propyl, acac is Acetylacetone, AA is acetylacetonate, and n is an integer of 1 or more. The coating composition according to claim 1, wherein the aqueous colloidal silica has a particle diameter of 10 to 40 nm. The coating composition of claim 1, wherein in Formula 1, a is 0 and R ² is an alkyl group of C ₁ -C ₆ . The coating composition of claim 1, wherein in Formula 1, a is an integer of 1 or more and R ¹ is methyl. The method of claim 1, wherein the organosilane compound is methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, phenyltrimethoxysilane , Tetramethoxysilane, tetraethoxysilane, tetraphenoxysilane, methyltriisopropoxysilane, tetrapropoxysilane, vinyltriisopropoxysilane. The method of claim 1, wherein the conductive fine particles are selected from the group consisting of antimony doped tin oxide, indium doped tin oxide, antimony doped zinc oxide or vanadium pentoxide, and has a particle distribution of 5 to 400 nm. Coating composition whose average particle diameter is 80 nm or less. The coating composition of claim 1 wherein said thermosetting catalyst is selected from the group consisting of alkali metal salts of carboxylic acids, aminecarboxylates, quaternary ammonium carboxylates, metal carboxylates and amines. Adding a hydrolysis catalyst to the aqueous colloidal silica to adjust the pH to 3-5; Mixing alkoxysilane with the silica to perform hydrolysis and condensation reaction; Adding a lower alcohol to the reaction product to prepare an intermediate composition; Adding a thermosetting catalyst to the intermediate composition; Preparing a matrix composition by adjusting the pH of the intermediate composition to which the catalyst is added to 1-3; Stabilizing the conductive particulate dispersion with a zirconium compound solution; And Mixing the matrix composition with the conductive particulate dispersion to impart antistatic properties to the final composition; The manufacturing method of the coating composition containing. The method of claim 8, wherein the particle size of the aqueous colloidal silica is 10 to 40 nm. The method of claim 8, wherein at least 60% of the conductive particulates have a particle diameter of 100 nm or less. The method according to claim 8, wherein the ratio of the conductive fine particles and the dispersion stabilizer in terms of zirconium oxide (ZrO ₂ ) is 1-5. The method of claim 8, wherein the concentration of the zirconium compound solution is 2-30% by weight.