KR102244762B1 - Glass film coating composition for automobile surface and glass film coating method on automobile surface using the same - Google Patents

Abstract

The present invention relates to a glass film coating composition for an automobile exterior and a method for coating a glass film on an automobile exterior using the same. The glass film coating composition comprises 5 to 15 wt% of polydimethylsiloxane, 1 to 20 wt% of ethyl alcohol, 10 to 30 wt% of a C12-15 ethoxylate primary alcohol having 9 moles of EO units and the balance of water, and uses a water-based solvent to be eco-friendly, has excellent durability such as water repellency, antifouling properties and abrasion resistance, can maintain excellent durability in various outdoor environments and can provide a glass film coating layer having excellent coating workability.

Description

Glass film coating composition for automobile surface and glass film coating method on automobile surface using the same}

The present invention is eco-friendly using a water-based solvent, has excellent durability such as water repellency, antifouling property, and abrasion resistance, can maintain excellent durability in various outdoor environments, and can provide a glass coating layer having excellent coating workability. It relates to a composition and a method for coating a glass film of an automobile exterior using the composition.

The automobile body is easily contaminated with dust, combustion additives, and exhaust gases. Therefore, it is well known to prevent contamination of the body by coating the body of an automobile with wax to form a wax film. In general, the effect of the coating is that the surface of the body is treated with water repellency, so when it comes into contact with the surface of the body, water forms water droplets and rolls under the surface of the body to prevent contaminants from adhering to the surface of the body and remaining in the water. And, it is difficult for the contaminant component to adhere to the surface of the body for the wax coating, so that even if the contaminant component adheres to the surface, it can be easily washed with water. This wax coating has an effect of improving water repellency and gloss in the initial stage.

However, there is a disadvantage in that in order to sufficiently effect the waxing, a cleaning operation of manual cleaning is required, and the effect is reduced in about 3 months. In addition, when the wax components are eluted and adhered to the glass surface, there is a disadvantage that the driver's vision is deteriorated. In other words, such a conventional hydrophobic film imparts hydrophobicity only temporarily or within a short time, and therefore, it is difficult to expect that the hydrophobic effect is sufficiently sustained, and the water film on the surface of the hydrophobic film is not uniformly formed, so that a transmission image or a reflection image is not formed. Several problems remained, such as causing distortion.

In order to overcome these shortcomings of wax coating and maintain the effect of the coating for a considerable period of time, research on materials such as siloxane-based, silazane-based, silane-based, silica-based, and fluorine-based materials as a coating composition for forming a glass coating film on automobile bodies has continued. Became.

However, the above-described coating composition has a problem that causes serious environmental problems due to the use of an organic solvent containing an organic compound that is harmful to the human body.

In addition, since the curing time of the glass coating layer is relatively long, a long time is required for curing, and the hardness is relatively low, so that the coating layer is easily peeled from the painted surface after application. In addition, it is difficult to form a uniform film due to agglomeration due to a decrease in dispersibility, or the durability of the glass film coating layer is not sufficiently secured in various outdoor environments such as temperature change and humidity change in summer and winter.

Korean Patent Registration No. 10-1745951 Korean Patent Registration No. 10-2088691 Korean Patent Registration No. 10-2093840

The present invention was conceived to solve the above-described problems, and one embodiment of the present invention is eco-friendly because it does not contain organic compounds harmful to the human body, has excellent durability such as water repellency, stain resistance, abrasion resistance, etc. to the exterior of a vehicle, and in summer and winter. It is intended to provide a glass coating composition for automobile exterior that can maintain excellent durability even in various outdoor environments such as changes in temperature and humidity, and can form a uniform coating to provide a glass coating layer having excellent coating workability.

In addition, another embodiment of the present invention is to provide a glass film coating method for an automobile exterior using the glass film coating composition for automobile exterior.

Various problems to be solved by the present invention are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

One embodiment of the present invention is polydimethylsiloxane 5 to 15% by weight, ethyl alcohol 1 to 20% by weight, C12-15 ethoxylate primary alcohol having 9 moles of EO units 10 to 30% by weight and the balance of water. It provides a glass film coating composition for automobile exterior comprising.

Each of the polydimethylsiloxanes independently has a weight average molecular weight of 70,000 to 550,000; Trimethylsiloxy-terminated polydimethylsiloxane, dimethylhydroxysiloxy-terminated polydimethylsiloxane, and dimethylvinylsiloxy-terminated polydimethylsiloxane are mixed in a weight ratio of 1 to 5: 1 to 5: 1, respectively You can use one.

The automotive exterior glass film coating composition may further include 0.1 to 7% by weight of poly-oligomeric silsesquioxane and 0.1 to 7% by weight of molybdenum disulfide represented by Formula 1 below.

[Formula 1]

In the above formula, R is each independently _{one or more selected from the group consisting of an alkyl group, SO 3} H, PO ₃ H ₂ and mixed functional groups thereof, but at least one is SO ₃ H or PO ₃ H ₂ , and R is Up to 16 can be functionalized.

The molybdenum disulfide is in the form of particles having an average particle diameter of 0.01 to 1 μm; The surface of the molybdenum disulfide is n-butyltrimethoxysilane, n-butyltriethoxysilane, n-pentyltrimethoxysilane, n-hexyltrimethoxysilane, n-heptyltrimethoxysilane, n-octylt Rimethoxysilane, cyclohexyltrimethoxysilane, cyclohexyltriethoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, 3,3,3-trifluoropropyltriethoxysilane, 3- 100 parts by weight of a trialkoxysilane compound consisting of (meth)acryloxypropyltrimethoxysilane, 3-(meth)acryloxypropyltriethoxysilane, and mixtures thereof, and 10 to 50 parts by weight of a tyrane compound represented by the following formula (2) It is possible to use those coated with a coating composition containing.

[Formula 2]

(m represents the integer of 0-4, n represents the integer of 0-2.)

In addition, another embodiment of the present invention is a glass film coating method of an automobile exterior using the glass film coating composition for automobile exterior as described above,

Car washing step (S100) of cleaning the exterior of the vehicle to remove foreign substances; Towel drying step (S200) of removing moisture from the exterior of the vehicle; A glass film coating step (S300) of forming a glass film coating layer by coating the automobile exterior glass film coating composition on the automobile exterior coating film; A heat-curing step (S400) of heat-treating the glass film coating layer formed on the automotive exterior coating film at a temperature of 50 to 80°C for 0.5 to 5 hours; And a natural cooling step (S500) of slowly cooling the heat-cured glass film coating layer at room temperature for 50 minutes or more.

According to the glass film coating composition for automobile exterior according to an embodiment of the present invention and the glass film coating method for automobile exterior using the same, it has excellent durability such as water repellency, stain resistance, abrasion resistance, etc. to the automobile exterior, and external contaminants can be easily removed, and in summer. , There is an effect of providing a glass film coating layer capable of maintaining excellent durability even in various outdoor environments such as temperature and humidity changes in winter.

In addition, since it does not contain organic compounds harmful to the human body by using an aqueous solvent, it has an eco-friendly effect.

In addition, since it is possible to form a uniform film, it has excellent gloss, and natural drying curing by curing without using a catalyst at room temperature is possible, so that there is an effect of having excellent coating workability.

1 is a flowchart illustrating a method of coating a glass film on an exterior of an automobile according to an exemplary embodiment of the present invention.
2 shows an actual image of a container containing a glass film coating composition for an exterior of an automobile according to an embodiment of the present invention.
FIG. 3 is a diagram showing test conditions for testing whether harmful components are detected for an automotive exterior glass coating composition according to an exemplary embodiment of the present invention.
4 shows a test report of whether or not harmful components are detected for an automobile exterior glass coating composition according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later.

One embodiment of the present invention is polydimethylsiloxane 5 to 15% by weight, ethyl alcohol 1 to 20% by weight, C12-15 ethoxylate primary alcohol having 9 moles of EO units 10 to 30% by weight and the balance of water. It provides a glass film coating composition for automobile exterior comprising.

According to such a glass film coating composition for automobile exterior according to an embodiment of the present invention and a glass film coating method for automobile exterior using the same, it has excellent durability such as water repellency, stain resistance, abrasion resistance, etc. to the automobile exterior, and external contaminants can be easily removed, There is an effect of providing a glass film coating layer capable of maintaining excellent durability even in various outdoor environments such as changes in temperature and humidity in summer and winter.

In addition, since it does not contain organic compounds harmful to the human body by using an aqueous solvent, it has an eco-friendly effect.

In addition, since it is possible to form a uniform film, it has excellent gloss, and natural drying curing by curing without using a catalyst at room temperature is possible, so that there is an effect of having excellent coating workability.

First, the polydimethylsiloxane has excellent adhesion to the exterior of an automobile, so it has durability, and maintains excellent strength so that it does not easily wear out or scratch, so it has a function of imparting excellent durability such as water repellency, antifouling property, and abrasion resistance.

The polydimethylsiloxane may preferably have a weight average molecular weight of 70,000 to 550,000.

More specifically, the polydimethylsiloxane is trimethylsiloxy-terminated polydimethylsiloxane, dimethylhydroxysiloxy-terminated polydimethylsiloxane, and dimethylvinylsiloxy-terminated polydimethylsiloxane, respectively, 1 to 5: 1 To 5: By using the mixture at a weight ratio of 1, the above functions can be further improved, and there is an effect that a uniform film can be formed.

The polydimethylsiloxane is preferably contained in an amount of 5 to 15% by weight, based on the glass coating composition for automobile exterior. If the content of the polydimethylsiloxane is too small, there is a problem that the above-described improvement effect may be insufficient, and if the content of the polydimethylsiloxane is too high, the thickness of the glass coating layer becomes non-uniform, which may reduce coating workability. There is a problem.

The ethyl alcohol functions to easily adjust the viscosity and form a thin and uniform film.

The ethyl alcohol is preferably contained in the range of 1 to 20% by weight based on the automotive exterior glass coating composition. When the content of the ethyl alcohol is too small, there is a problem that the above-described improvement effect may be insufficient, and when the content of the ethyl alcohol is too large, there is a problem that the durability may be lowered.

The C12-15 ethoxylate primary alcohol having 9 moles of EO units is a linear surfactant, and the automotive exterior glass coating composition according to an embodiment of the present invention is stably dispersed in an aqueous solvent to provide excellent durability and coating. It functions to implement workability.

The C12-15 ethoxylate primary alcohol having 9 moles of EO units is preferably contained in the range of 10 to 30% by weight based on the glass coating composition for automobile exterior. If the content of the C12-15 ethoxylate primary alcohol having 9 moles of EO units is too small, the above-described improvement effect may be insufficient, and the C12-15 ethoxylate having 9 moles of EO units If the content of the rate primary alcohol is too large, there is a problem in that the curing time is too delayed and the coating workability may be deteriorated.

The water replaces the conventional organic solvent containing an organic compound harmful to the human body, and functions to stably and rapidly cure the glass coating composition for an exterior of an automobile according to an embodiment of the present invention.

In addition, by further mixing and dissolving a hyaluronic acid salt having a molecular weight of 10 kDa at a concentration of 0.1 to 1.5% by weight in water, the abrasion resistance and heat resistance of the automotive exterior glass coating composition according to an embodiment of the present invention can be greatly improved, There is an effect that the curing speed can be made faster. At this time, non-limiting examples of the hyaluronic acid salt may be a sodium salt, a potassium salt, a calcium salt, a zinc salt, a magnesium salt, an ammonium salt, or the like of the hyaluronic acid. More preferably, a mixture of the sodium salt and the ammonium salt of hyaluronic acid in a weight ratio of 1: 1 may be used to further improve the above effect.

In addition, the automotive exterior glass coating composition is 0.1 to 7% by weight of poly-oligomeric silsesquioxane represented by the following formula (1) and disulfide in order to improve the durability such as abrasion resistance of the coating film and the resistance due to external temperature change or climate change. It may further contain 0.1 to 7% by weight of molybdenum.

[Formula 1]

In the above formula, R is each independently _{one or more selected from the group consisting of an alkyl group, SO 3} H, PO ₃ H ₂ and mixed functional groups thereof, but at least one is SO ₃ H or PO ₃ H ₂ , and R is Up to 16 can be functionalized.

The poly oligomeric silsesquioxane represented by Formula 1 can impart excellent dispersibility in an aqueous solvent, and has a function of imparting excellent durability such as improved water repellency, stain resistance, abrasion resistance, and heat resistance to the cured coating film.

In the above formula, each R independently includes an SO ₃ H functional group and a PO ₃ H ₂ functional group at the same time; At this time, _{R having a SO 3} H functional group and R having a PO ₃ H ₂ functional group may further improve the above-described effect by using one having a molar ratio of 1: 1 to 2, respectively. More preferably, the poly oligomeric silsesquioxane may be represented by the following Formula 1-1.

[Formula 1-1]

The molybdenum disulfide serves as a lubrication between the network structure formed by the polydimethylsiloxane and the poly oligomeric silsesquioxane represented by Chemical Formula 1, and functions to greatly improve durability such as stable and excellent coating strength and water repellency. .

The molybdenum disulfide is preferably used in the form of particles having an average particle diameter of 0.01 to 1 μm.

In addition, the surface of the molybdenum disulfide is n-butyltrimethoxysilane, n-butyltriethoxysilane, n-pentyltrimethoxysilane, n-hexyltrimethoxysilane, n-heptyltrimethoxysilane, n- Octyltrimethoxysilane, cyclohexyltrimethoxysilane, cyclohexyltriethoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, 3,3,3-trifluoropropyltriethoxysilane, 100 parts by weight of a trialkoxysilane compound consisting of 3-(meth)acryloxypropyltrimethoxysilane, 3-(meth)acryloxypropyltriethoxysilane, and mixtures thereof, and thiran compounds 10 to 50 represented by the following formula (2) By using one coated with a coating composition containing parts by weight, not only can the above-described effects be further improved, but also water repellency and antifouling properties can be greatly improved.

[Formula 2]

(m represents the integer of 0-4, n represents the integer of 0-2.)

In this case, as the trialkoxysilane compound, 3,3,3-trifluoropropyltrimethoxysilane or 3,3,3-trifluoropropyltriethoxysilane may be more preferably used.

On the other hand, another embodiment of the present invention provides a glass film coating method of an automobile exterior using the glass film coating composition for automobile exterior described above.

The method of coating a glass film on an automobile exterior includes a washing step (S100) of cleaning the exterior of the vehicle to remove foreign substances; Towel drying step (S200) of removing moisture from the exterior of the vehicle; A glass film coating step (S300) of forming a glass film coating layer by coating the automobile exterior glass film coating composition on the automobile exterior coating film; A heat-curing step (S400) of heat-treating the glass film coating layer formed on the automotive exterior coating film at a temperature of 50 to 80°C for 0.5 to 5 hours; And a natural cooling step (S500) of slowly cooling the heat-cured glass film coating layer at room temperature for 50 minutes or more.

A flow chart of a method for coating a glass film on an exterior of an automobile according to an embodiment of the present invention is shown in FIG. 1.

The car washing step (S100) is a process of removing various foreign substances from the exterior of the vehicle prior to the formation of the glass film coating layer.After removing various foreign substances from the exterior of the vehicle using a high pressure water sprayer, the exterior coating film is washed using a detergent having a degreasing component. After that, it can be carried out by sprinkling high-pressure water to completely remove the bubbles generated by the detergent.

The towel drying step (S200) is a process of removing moisture remaining on the exterior of the vehicle after completing the washing step (S100), and may be performed by completely removing moisture from the entire exterior of the vehicle using a microfiber towel.

In the glass film coating step (S300), in order to coat the glass film coating layer on the outer surface of the coating film of an automobile, a multi-layered gloss pad is attached to the surface of the gloss pad by attaching a multi-layered gloss pad to a low-speed gloss machine capable of low-speed rotation of 100 to 1,000 rpm or less. After applying the glass coating composition for automobile exterior, it may be performed by uniformly coating the glass coating composition for automotive exterior on the outer surface of the coating film of the exterior of the vehicle while rotating the gloss pad of the low-speed gloss device at a low speed. At this time, the actual image of the container containing the glass film coating composition for automobile exterior according to an embodiment of the present invention is as shown in FIG. 2.

However, the coating of the automotive exterior glass film coating composition is only proposed as a non-limiting example, and the present invention is not limited thereto. The coating of the automotive exterior glass film coating composition may be applied without limitation to a coating method generally used in this field.

The glass film coating layer formed on the automotive exterior coating film can be quickly cured even by room temperature curing, but it is preferable to perform a heat curing step (S400) in order to improve work efficiency through a faster curing speed.

The heat curing step (S400) may be performed by heating the glass film coating layer at a temperature of 50 to 80°C for 0.5 to 5 hours using a hot air or an electric heater to heat the glass film coating layer formed on the automotive exterior coating film. have. At this time, in order to prevent impurities from adhering to the surface of the glass film coating layer during the heat treatment process, it is preferable that the heating and curing step (S500) is performed using an electric heater inside a dedicated chamber that can be blocked from the outside through complete sealing.

After the heat curing step (S400), the natural cooling step (S500) may be performed. In order to stabilize the heat-cured glass film coating layer through the heat-curing step (S400), the heat-cured glass film coating layer is slowly cooled at room temperature for at least 50 minutes. Also at this time, in order to prevent impurities from adhering to the surface of the glass coating layer, it is preferable to perform slow cooling in a dedicated chamber capable of blocking from the outside through complete sealing.

According to the glass film coating composition for automobile exterior according to an embodiment of the present invention and the glass film coating method for automobile exterior using the same, it has excellent durability such as water repellency, stain resistance, abrasion resistance, etc. to the automobile exterior, and external contaminants can be easily removed, and in summer. , There is an effect of providing a glass film coating layer capable of maintaining excellent durability even in various outdoor environments such as temperature and humidity changes in winter.

In addition, since it does not contain organic compounds harmful to the human body by using an aqueous solvent, it has an eco-friendly effect.

In addition, since it is possible to form a uniform film, it has excellent gloss, and natural drying curing by curing without using a catalyst at room temperature is possible, so that there is an effect of having excellent coating workability.

Above, the preferred embodiment of the present invention has been described in detail, but the present invention is not limited to the above embodiment, and various modifications by those of ordinary skill in the relevant field within the scope of the technical idea of the present invention This is possible.

<Example 1>

Trimethylsiloxy-terminated polydimethylsiloxane 8.5% by weight, ethyl alcohol 9% by weight, C12-15 ethoxylate primary alcohol with 9 moles of EO units (Neodol® 25-9) 17.5% by weight and the remaining amount of water were mixed to prepare a glass coating composition for automobile exterior.

<Example 2>

Polydimethylsiloxane obtained by mixing trimethylsiloxy-terminated polydimethylsiloxane, dimethylhydroxysiloxy-terminated polydimethylsiloxane, and dimethylvinylsiloxy-terminated polydimethylsiloxane in a weight ratio of 3: 3: 1, respectively 14% by weight, 18% by weight of ethyl alcohol, 22% by weight of C12-15 ethoxylate primary alcohol (Neodol (registered trademark) 25-9) with 9 moles of EO units and the remaining amount of water are mixed A glass film coating composition for automobile exterior was prepared. At this time, in the water, a molecular weight of 10 kDa and a hyaluronic acid salt obtained by mixing a sodium salt and an ammonium salt of hyaluronic acid in a ratio of 1: 1 were mixed and dissolved at a concentration of 0.7% by weight.

<Example 3>

Polydimethylsiloxane obtained by mixing trimethylsiloxy-terminated polydimethylsiloxane, dimethylhydroxysiloxy-terminated polydimethylsiloxane, and dimethylvinylsiloxy-terminated polydimethylsiloxane in a weight ratio of 3: 3: 1, respectively 9.5% by weight, 11% by weight of ethyl alcohol, 13.5% by weight of C12-15 ethoxylate primary alcohol (Neodol (registered trademark) 25-9) with 9 moles of EO units, as shown in the following formula 1-1 A glass coating composition for automobile exterior was prepared by mixing 2.5% by weight of the indicated poly-oligomeric silsesquioxane, 1.5% by weight of molybdenum disulfide (average particle diameter: 0.57 μm particles) and the remaining amount of water. At this time, in the water, a molecular weight of 10 kDa and a hyaluronic acid salt obtained by mixing a sodium salt and an ammonium salt of hyaluronic acid in a ratio of 1: 1 were mixed and dissolved at a concentration of 0.7% by weight.

[Formula 1-1]

<Example 4>

A glass film coating composition for automobile exterior was prepared in the same manner as in Example 3, but the molybdenum disulfide surface was 100 parts by weight of 3,3,3-trifluoropropyltriethoxysilane, and tyrane represented by the following formula 2-1. What was coated with a coating composition containing 37 parts by weight of the compound was used.

[Formula 2-1]

(m is 1, n is 2)

<Comparative Example 1>

Dimethylhydroxysiloxy-terminated polydimethylsiloxane 18% by weight of polydimethylsiloxane, 33% by weight of ethyl alcohol, 24% by weight of ethyl acetate, and 25% by weight of alkylphenol ethoxylate (Synperonic (registered trademark) NP9) are mixed A comparative coating composition was prepared.

<Test Example>

Basic performance evaluation

A test body was prepared by coating the automotive exterior glass film coating composition prepared in Examples 1 to 4 and the comparative coating composition prepared in Comparative Example 1 on a standard coating plate for automobiles. The following items were evaluated for the prepared test body, and the results are shown in Table 1 below.

(1) Abrasion resistance test: The obtained coating film was put in an oven set at a temperature of 70° C. for 30 minutes, heated, then allowed to cool, and pencil hardness was measured according to KS D 6711:1992.

(2) Water repellency test: The obtained coating film was put in an oven set at a temperature of 70° C. for 30 minutes to heat, then allowed to cool, and the contact angle was measured according to a water contact angle measurement method for a commonly used coating film. More than 100 degrees was evaluated as having water repellency.

(3) Antifouling test: After palm contact, fingerprint adhesion was visually evaluated and classified into A, B, C, and D grades. A is when there is no fingerprint (very good), B is when the fingerprints of some fingers remain blurry (good), C is when the fingerprints of all fingers remain blurry (usually), and D is when the fingerprints of all fingers are clearly visible. It indicates the remaining case (defective).

(4) Durability test: After washing 1 to 10 times, the thickness change of the coating layer was measured, and the thickness reduction rate was converted into a percentage. If the thickness reduction rate was less than 10%, it was evaluated as having durability.

(5) Heat resistance test: According to KS M 5000: 2009, when heating to a specific temperature for 1 hour, it was determined by checking for abnormalities. Abnormal phenomena include swelling, cracking, and falling.

(6) Gloss: According to KS MISO 2813:2007, the test object was judged by measuring the degree of reflection of light at an angle of 60°.

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Wear resistance
(Pencil hardness) 8H 8H 9H 9H 5H Water repellency
(Water contact angle) 108 113 122 125 95 Antifouling B A A A C durability fitness fitness fitness fitness incongruity Heat resistance
(500±20)℃ clear clear clear clear offshoot Heat resistance
(700±20)℃ clear clear clear clear offshoot Heat resistance
(1000±20)℃ offshoot clear clear clear offshoot Gloss (60°) 19% 23% 22% 25% 12%

As can be seen in Table 1, the automotive exterior glass film coating composition prepared in Examples 1 to 4 of the present invention was compared with the comparative coating composition prepared in Comparative Example 1, abrasion resistance (pencil hardness), water repellency (water Contact angle), stain resistance, durability, heat resistance, and gloss were remarkably excellent.

Safety evaluation

The automotive exterior glass coating composition prepared in Example 3 was packaged in a container as shown in FIG. 2, and it was examined whether or not harmful components were detected in accordance with Article 6 (3) [Designation of Products Concerned of Hazards and Standards for Safety and Labeling]. . At this time, the test conditions are shown in Fig. 3; The test results are shown in FIG. 4.

As shown in Figures 3 and 4, it was confirmed that no harmful components harmful to the human body were detected in the glass coating composition for automobile exterior prepared in Example 3 of the present invention.

That is, the glass coating composition for automobile exterior according to the present invention uses an aqueous solvent and does not contain harmful components harmful to the human body, so it is eco-friendly and has abrasion resistance (pencil hardness), water repellency (water contact angle), stain resistance, durability, heat resistance, and gloss. It was confirmed that the basic performance was very excellent.

As described above, those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, all of the embodiments described above are illustrative and should be understood as non-limiting. The scope of the present invention should be construed as including all changed or modified forms derived from the meaning and scope of the claims to be described later rather than the above detailed description, and equivalent concepts thereof.

Claims (5)

Polydimethylsiloxane 5 to 15% by weight, ethyl alcohol 1 to 20% by weight, C12-15 ethoxylate primary alcohol with 9 moles of EO units 10 to 30% by weight, molybdenum disulfide 0.1 to 7% by weight and the balance water To include;
The molybdenum disulfide is in the form of particles having an average particle diameter of 0.01 to 1 μm,
The surface of the molybdenum disulfide is n-butyltrimethoxysilane, n-butyltriethoxysilane, n-pentyltrimethoxysilane, n-hexyltrimethoxysilane, n-heptyltrimethoxysilane, n-octylt Rimethoxysilane, cyclohexyltrimethoxysilane, cyclohexyltriethoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, 3,3,3-trifluoropropyltriethoxysilane, 3- 100 parts by weight of a trialkoxysilane compound consisting of (meth)acryloxypropyltrimethoxysilane, 3-(meth)acryloxypropyltriethoxysilane, and mixtures thereof, and 10 to 50 parts by weight of a tyrane compound represented by the following formula (2) A glass film coating composition for automobile exterior, characterized in that the coating treatment is performed with a coating composition containing.
[Formula 2]

(m represents the integer of 0-4, n represents the integer of 0-2.)
The method of claim 1,
Each of the polydimethylsiloxanes independently has a weight average molecular weight of 70,000 to 550,000;
Trimethylsiloxy-terminated polydimethylsiloxane, dimethylhydroxysiloxy-terminated polydimethylsiloxane, and dimethylvinylsiloxy-terminated polydimethylsiloxane are mixed in a weight ratio of 1 to 5: 1 to 5: 1, respectively A glass coating composition for an exterior of an automobile, characterized in that one.
The method of claim 1,
The automotive exterior glass coating composition further comprises 0.1 to 7% by weight of poly oligomeric silsesquioxane represented by the following Chemical Formula 1.
[Formula 1]

In the above formula, R is each independently _{one or more selected from the group consisting of an alkyl group, SO 3} H, PO ₃ H ₂ and mixed functional groups thereof, but at least one is SO ₃ H or PO ₃ H ₂ ,
The R may be functionalized up to 16.
delete As a glass film coating method for automobile exteriors using the glass film coating composition for automobile exteriors according to any one of claims 1 to 3,
Car washing step (S100) of cleaning the exterior of the vehicle to remove foreign substances;
Towel drying step (S200) of removing moisture from the exterior of the vehicle;
A glass film coating step (S300) of forming a glass film coating layer by coating the automobile exterior glass film coating composition on the automobile exterior coating film;
Heat curing step (S400) of heat-treating the glass film coating layer formed on the automotive exterior coating film at a temperature of 50 to 80°C for 0.5 to 5 hours; And
And a natural cooling step (S500) of slowly cooling the heat-cured glass film coating layer at room temperature for at least 50 minutes.

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