KR20190107870A - Pre-treatment composition for a glass film coating and method for forming a glass film coating on an automobile surface using the same - Google Patents

Abstract

The present invention provides a pre-treatment composition for coating a glass film, and a method of coating the glass film on an automobile exterior using the pre-treatment composition. The pre-treatment composition comprises: 5 to 20 wt% of one or more selected from bis(3-aminopropyl)dimethoxysilane and bis(3-aminopropyl)diethoxysilane; 3 to 5 wt% of one or more selected from 4-{[hydroxy(4-hydroxyphenyl)methyl]amino}benzene-1-sulfonic acid and 6-{[(4-amino-3-hydroxyphenyl)methyl]amino}pyrridine-3-sulfonic acid; 0.005 to 5 wt% of a fluorine-based alcohol surfactant; and a residual amount of an organic solvent. According to the present invention, the composition provides an effect of effectively preventing water spot generated during coating of the glass film. Therefore, the method can provide a very excellent glass film coating.

Description

Pre-treatment composition for a glass film coating and method for forming a glass film coating on an automobile surface using the same}

The present invention relates to a pretreatment composition for glass film coating and a glass film coating method for an automotive exterior using the same.

The vehicle body is easily contaminated with dust, combustion additives, exhaust gases, and the like. It is therefore well known to prevent contamination of the body by coating the automobile body with wax to form a wax coating.

In general, the effect of the coating is that the surface of the body is water-repellent, so that water forms water droplets upon contact with the surface of the body and rolls down below the surface of the body, thereby preventing contaminants in the water from adhering to the surface of the body and remaining. In addition, it is difficult for the contaminant component to adhere to the surface of the main body with respect to the wax coating, so that the contaminant component can be easily washed with water even if it adheres to the surface.

The wax coating initially has the effect of improving water repellency and gloss. However, in order for the waxing to be effective enough, a manual washing operation is required, and the effect is reduced by about three months. In addition, when the wax components are eluted and adhered to the glass surface, there is a disadvantage that the driver's watch is bad.

Overcoming the shortcomings of the wax coating and considering how the effect of the coating can be maintained for a considerable period of time due to polysilazane having a strong response to acid rain or other contaminants, which was initially developed to make an interlayer insulating film of semiconductors. Glass film coatings have been used as automotive coating methods.

However, the glass film coating layer was recognized to solve the above disadvantages of the wax coating, it was confirmed that the water spot (water spot) occurs in the drying process as the tee of jade. Therefore, there is a need for solving this disadvantage in this field.

Republic of Korea Publication No. 10-2016-0112114

The present invention has been made to solve the above problems of the prior art, by applying a coating on the surface of the coating object prior to the glass film coating to effectively prevent the occurrence of water spot (water spot) generated during the coating of the glass film, An object of the present invention is to provide a pretreatment composition for coating a glass film which can be improved and a glass film coating method for an automobile exterior using the same.

The present invention, in order to achieve the above object,

5-20 wt% of at least one selected from bis (3-aminopropyl) dimethoxysilane and bis (3-aminopropyl) diethoxysilane; 4-{[hydroxy (4-hydroxyphenyl) methyl] amino} benzene-1-sulfonic acid and 6-{[(4-amino-3-hydroxyphenyl) methyl] amino} pyridine-3-sulfonic acid At least 3 to 5% by weight; 0.005 to 5 wt% of a fluorine alcohol surfactant; And it provides a pretreatment composition for coating a glass film comprising a residual amount of the organic solvent.

In addition, the present invention

(A) washing the car exterior coating film to remove foreign matters (S100);

(b) a towel drying step (S200) for removing moisture from the exterior coating film;

(C) a pretreatment step (S300) of applying the pretreatment composition for the glass film coating of the present invention to the automotive exterior coating film;

(D) the glass film coating step of applying a glass film coating to the vehicle exterior coating film (S400); And

(e) a heat curing step (S500) 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 10 hours.

The pretreatment composition for the glass film coating of the present invention is effectively applied to the surface of the coating object prior to the glass film coating to prevent the occurrence of water spot (water spot) generated during the glass film coating, and also provides excellent antifouling properties.

In addition, the glass film coating method for the automotive exterior of the present invention provides an effect of forming an excellent glass film by using the pretreatment composition for the glass film coating.

1 is a flowchart illustrating a glass film coating method for an automotive exterior of the present invention.

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

5-20 wt% of at least one selected from bis (3-aminopropyl) dimethoxysilane and bis (3-aminopropyl) diethoxysilane; 4-{[hydroxy (4-hydroxyphenyl) methyl] amino} benzene-1-sulfonic acid and 6-{[(4-amino-3-hydroxyphenyl) methyl] amino} pyridine-3-sulfonic acid At least 3 to 5% by weight; 0.005 to 5 wt% of a fluorine alcohol surfactant; And it relates to a pretreatment composition for coating a glass film comprising a residual amount of the organic solvent.

At least one selected from the bis (3-aminopropyl) dimethoxysilane and bis (3-aminopropyl) diethoxysilane serves to prevent the occurrence of water spots generated during coating of the glass film.

That is, since the components are silanes containing an amino group and a dialkoxy group, when the pretreatment composition for coating the glass film of the present invention is applied to the surface of the coating object before the glass film coating, it is possible to enhance the bonding force between the coating surface and the glass film coating. Perform the function. Therefore, when the glass film coating is performed without the pretreatment as described above, water spots are generated as the coating film shrinks during the heat treatment for curing, and when pretreated with the pretreatment composition for the glass film coating of the present invention containing the above components, Since the glass film coating is prevented from shrinking upon curing, the occurrence of water spots is prevented.

When at least one selected from bis (3-aminopropyl) dimethoxysilane and bis (3-aminopropyl) diethoxysilane is included in less than 5% by weight, it is difficult to achieve a desired effect, and it is more than 20% by weight. In this case, the viscosity is so high that the effect is reduced.

Selected from 4-{[hydroxy (4-hydroxyphenyl) methyl] amino} benzene-1-sulfonic acid and 6-{[(4-amino-3-hydroxyphenyl) methyl] amino} pyridine-3-sulfonic acid Each of the at least one compound represented by Formula 1 and Formula 2:

[Formula 1]

[Formula 2]

The compounds of Formula 1 and Formula 2 together with the silane compound described above serve to prevent the occurrence of water spots generated during the coating of the glass film, and prevent the binding of anionic contaminants by sulfite anions. To prevent contamination.

Selected from 4-{[hydroxy (4-hydroxyphenyl) methyl] amino} benzene-1-sulfonic acid and 6-{[(4-amino-3-hydroxyphenyl) methyl] amino} pyridine-3-sulfonic acid It is difficult to expect the desired effect when one or more kinds are included in less than 3% by weight, and may be less than 5% by weight.

Examples of the fluorine alcohol surfactant include hexafluorobutanol, hexafluoropentanol, hexafluorohexanol, hexafluoroheptanol, hexafluorooctanol, perfluorohexyl methanol, and 2- (perfluorohexyl) Ethanol, 2- (pentafluorophenyl) ethanol, (hexafluoro-2-hydroxyisopropyl) benzene, hexafluoro-2- (p-tolyl) isopropanol, 4,5,5,6,6,6 -Hexafluoro-4- (trifluoromethyl) hexan-1-ol, and 4,5,5,6,6,6-hexafluoro-4- (trifluoromethyl) -2-hexene-1 One or more selected from the group consisting of -ols and the like can be used.

The content of the surfactant is preferably included 0.005 ~ 5% by weight relative to the total weight of the composition. If the content of the surfactant is less than 0.005% by weight, stains and liquids tend to occur. If the amount is more than 5% by weight, the surface tension of the solution is excessively reduced and coating defects such as orange peel are generated on the surface of the coating film. There is a tendency.

As the organic solvent, ethyl acetate, butyl acetate, diethylene glycol dimethyl ether, diethylene glycol dimethyl ethyl ether, methyl methoxy propionate, ethyl ethoxy propionate (EEP), ethyl lactate, propylene glycol methyl ether acetate (PGMEA), propylene glycol methyl ether, propylene glycol propyl ether, methyl cellosolve acetate, ethyl cellosolve acetate, diethylene glycol methyl acetate, diethylene glycol ethyl acetate, acetone, methyl isobutyl ketone, cyclohexanone, dimethyl Formamide (DMF), N, N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidone (NMP), γ-butyrolactone, diethyl ether, ethylene glycol dimethyl ether, diglyme , Tetrahydrofuran (THF), methanol, ethanol, propanol, iso-propanol, methyl cellosolve, ethyl cellosolve, diethylene glycol methyl ether, diethylene glycol Call ether, dipropylene glycol methyl ether, toluene, can be used to at least one selected from toluene, xylene, hexane, the group consisting of heptane and octane.

In addition, the present invention

(A) washing the car exterior coating film to remove foreign matters (S100);

(b) a towel drying step (S200) for removing moisture from the exterior coating film;

(C) a pretreatment step (S300) of applying the pretreatment composition for the glass film coating of the present invention to the automotive exterior coating film;

(D) the glass film coating step of applying a glass film coating to the vehicle exterior coating film (S400); And

(e) a heat-curing step (S500) 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 10 hours (S500).

The car wash step (S100) is a process of removing various foreign matters of the automotive exterior coating film prior to forming the glass film coating layer. First, various foreign matters of the automotive exterior coating film are removed first using a high pressure sprayer, and then the exterior coating film using a cleaning agent having a degreasing component. After washing, sprinkling high pressure water is a process to completely remove the bubbles generated by the cleaning agent.

The towel drying step (S200) is a process of removing water remaining in the exterior coating film of the vehicle after finishing the washing step (S100) and completely removing the entire exterior exterior coating film using a microfiber towel.

The pretreatment step (S300) may be applied to the surface of the coating object of the pretreatment composition for the glass film coating of the present invention in various ways, for example, it may be applied in a spray method.

In the glass film coating step (S400), a glossy pad having a multilayer structure is attached to a low-speed polisher capable of rotating at a low speed of 100 to 1,000 rpm or less to form a glass film coating layer on the outer surface of the automotive exterior coating film. After applying the glass film coating agent, the glass film coating agent is evenly applied to the coating film of the automotive exterior coating film while rotating the glossy pad at a low speed using a low speed polisher.

As the glass film coating agent, those known in the art may be used without limitation.

In the heat curing step (S500), the glass film coating layer is heated at a temperature of 50 to 80 ° C. for 0.5 to 10 hours using a hot air blower or an electric heater to heat-treat the glass film coating layer formed on the vehicle exterior coating film. In order to prevent adhesion to the surface of the glass film coating layer, the heat curing step (S500) is preferably performed using an electric heater inside the dedicated chamber that can be blocked from the outside through a complete sealing.

After the heat curing step (S500) may be followed by a natural cooling step (S600) step. In order to stabilize the heat-cured glass film coating layer through the heat curing step (S500), the heat-cured glass film coating layer is cooled at least 50 minutes at room temperature.

In this case, in order to prevent impurities from adhering to the surface of the glass film coating layer, it is preferable to perform a slow cooling in a dedicated chamber that can be blocked from the outside through a complete sealing.

In the glass film coating method for the automotive exterior of the present invention, the coating method generally used in this field is limited except for the pretreatment step (S300) of applying the pretreatment composition for the glass membrane coating of the present invention to the automotive exterior coating film. Can be applied without.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following examples are intended to illustrate the present invention more specifically, but the scope of the present invention is not limited by the following examples. The following examples can be appropriately modified and changed by those skilled in the art within the scope of the present invention.

Example 1 Preparation of Pretreatment Composition for Glass Film Coating

Bis (3-aminopropyl) dimethoxysilane (Bis (3-aminopropyl) dimethoxysilane (CAS No .: 51749-36-1)) 12 wt%, 4-{[hydroxy (4-hydroxyphenyl) methyl] amino } 3% by weight of benzene-1-sulfonic acid (4-{[Hydroxy (4-hydroxyphenyl) methyl] amino} benzene-1-sulfonic acid (CAS No .: 62268-55-7)), 0.5% by weight of hexafluorobutanol ; And 84.5% by weight of butyl acetate to prepare a pretreatment composition for coating the glass film.

Example 2: Glass Film Coating on Automotive Exterior

Example 2-1 Preparation of Glass Membrane Coating

Organic polysilazane is a product of Kion HTA-1500 manufactured by AZ Electronic Materials Co., Ltd., in which a silane substituent is substituted with a dimethyl group, a methyl-hydro group, or a triethoxysilane in a nitrogen of silazane. 6.5% by weight, 7.5% by weight of butyl acetate organic solvent manufactured by SK Chemical, 46% by weight of desulfurized light naphtha organic solvent, solvent No. 2 manufactured by Samsung General Chemicals, and dihydrate 40 wt% of a mixture of N-Paraffin, Iso-Paraffin, and Naphthenic, D-sol 150, prepared by Pharma, was mixed.

Solvent No. 2, which has the largest weight ratio among the above ingredients, is first placed in a magnetic stirrer, and then D-sol 150, Butyl Acetate, and HTA-1500 are sequentially added, followed by stirring for 30 minutes. Obtained.

Example 2-2: Glass Film Coating

The vehicle exterior coating film was washed to remove foreign substances and washed. Towel drying to remove water from the exterior coating film was performed (S200).

The pretreatment composition for glass film coating prepared in Example 1 was spray coated on the automotive exterior coating film. Subsequently, the glass film coating agent prepared in Example 2 was applied to the vehicle exterior coating film to coat the glass film.

The glass film coating layer formed on the automotive exterior coating film was heat-treated at a temperature of 70 ° C. for 4 hours to perform curing (S500).

Comparative Example 1: Glass Film Coating on Automobile Exterior

Glass film coating was performed in the same manner as in Example 2-2, except that the pretreatment was not performed with the pretreatment composition of Example 1 as compared with Example 2-2.

First, the vehicle exterior coating film was washed to remove foreign substances and washed. Towel drying was performed to remove moisture from the exterior coating film. The glass film coating agent prepared in Example 2-1 was applied to an automotive exterior coating film to coat a glass film.

The glass film coating layer formed on the automotive exterior coating film was cured by heat treatment at a temperature of 70 ℃ for 4 hours.

Test Example 1: Evaluation of Automotive Exterior Glass Film Coating

The appearance of the glass film coatings prepared in Example 2 and Comparative Example 1 was visually observed under a sodium light source to evaluate the quality of the glass film coating, and the results are shown in Table 1 below.

Water Spot Count Uniformity Comparative Example 1 9 △ Example 2 0 ◎

[Decision Criteria] X: Poor, △: Normal, ○: Good, ◎: Excellent

As confirmed in Table 1, in the glass film coating of Example 2 treated with the pretreatment composition of the present invention, no water spot was found, but the glass film coating of Comparative Example 1 was formed without treatment of the pretreatment composition. Multiple water spots have been found in glass coatings. Therefore, it is possible to confirm the excellent effect of the pretreatment composition for coating the glass film of the present invention from this fact.

In addition, although the glass film coating of Example 2 treated with the pretreatment composition of the present invention was confirmed to have excellent uniformity, the glass film coating of Comparative Example 1, in which the glass film coating was formed without the treatment of the pretreatment composition, had a uniformity in Example 2 Not good compared to

Claims (5)

5-20 wt% of at least one selected from bis (3-aminopropyl) dimethoxysilane and bis (3-aminopropyl) diethoxysilane; 4-{[hydroxy (4-hydroxyphenyl) methyl] amino} benzene-1-sulfonic acid and 6-{[(4-amino-3-hydroxyphenyl) methyl] amino} pyridine-3-sulfonic acid At least 3 to 5% by weight; 0.005 to 5 wt% of a fluorine alcohol surfactant; And a residual amount of organic solvent. The method of claim 1,
The fluorine-based alcohol surfactant is hexafluorobutanol, hexafluoropentanol, hexafluorohexanol, hexafluoroheptanol, hexafluorooctanol, perfluorohexylmethanol, 2- (perfluorohexyl) ethanol , 2- (pentafluorophenyl) ethanol, (hexafluoro-2-hydroxyisopropyl) benzene, hexafluoro-2- (p-tolyl) isopropanol, 4,5,5,6,6,6- Hexafluoro-4- (trifluoromethyl) hexan-1-ol, and 4,5,5,6,6,6-hexafluoro-4- (trifluoromethyl) -2-hexene-1- Pretreatment composition for coating a glass film, characterized in that at least one member selected from the group consisting of all. The method of claim 1,
The organic solvent may be ethyl acetate, butyl acetate, diethylene glycol dimethyl ether, diethylene glycol dimethyl ethyl ether, methyl methoxy propionate, ethyl ethoxy propionate (EEP), ethyl lactate, propylene glycol methyl ether acetate ( PGMEA), propylene glycol methyl ether, propylene glycol propyl ether, methyl cellosolve acetate, ethyl cellosolve acetate, diethylene glycol methyl acetate, diethylene glycol ethyl acetate, acetone, methyl isobutyl ketone, cyclohexanone, dimethylform Amide (DMF), N, N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidone (NMP), γ-butyrolactone, diethyl ether, ethylene glycol dimethyl ether, diglyme, Tetrahydrofuran (THF), methanol, ethanol, propanol, iso-propanol, methyl cellosolve, ethyl cellosolve, diethylene glycol methyl ether, diethylene glycol Pretreatment compositions for coating glass film, characterized in that at least one member selected from ethyl ether, dipropylene glycol methyl ether, toluene, xylene, hexane, the group consisting of heptane and octane. (A) washing the car exterior coating film to remove foreign matters (S100);
(b) a towel drying step (S200) for removing moisture from the exterior coating film;
(C) a pretreatment step (S300) of applying a pretreatment composition for coating the glass film of any one of claims 1 to 3 to the automotive exterior coating film;
(D) the glass film coating step of applying a glass film coating to the vehicle exterior coating film (S400); And
(e) a heat curing step (S500) 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 10 hours (S500). The method of claim 1,
The coating of the pre-treatment composition for the glass film coating in the step (c) is carried out by a spray method.

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