KR20170124841A - Color primer-surfacer paint composition and method for repairing automobile using the same - Google Patents

Abstract

A disclosed color primer-surfacer paint composition comprises a white primer-surfacer paint composition including 20 to 45 wt% of an acrylic polyol resin having a solid content of 40 to 60 wt%, 15 to 30 wt% of talc, 5 to 15 wt% of barium sulfate, 1 to 15 wt% of titanium dioxide, 0.01 to 1 wt% of a urethane reaction promoter, and extra organic solvents; and a black primer-surfacer paint composition, which comprises 20 to 45 wt% of an acrylic polyol resin having a solid content of 40 to 60 wt%, 15 to 30 wt% of talc, 5 to 15 wt% of barium sulfate, 1 to 15 wt% of titanium dioxide, 0.01 to 1 wt% of a urethane reaction promoter, 1 to 3 wt% of carbon black, 0.01 to 1 wt% of a wet dispersant having an acid value of 100 to 180 mgKOH/g and extra organic solvents. Provided are the color primer-surfacer paint composition and a method for repairing an automobile using the same, which can reduce the number of times of coating of top coating.

Description

TECHNICAL FIELD [0001] The present invention relates to a color primer-surface coating composition, and a method of repairing a car using the same. BACKGROUND ART [0002]

TECHNICAL FIELD The present invention relates to a coating composition, and more particularly, to a color primer-spacer coating composition and a method for repairing an automobile using the coating composition.

Automotive painting is an important process in car maintenance and maintenance. Therefore, the physical properties of the paint and the economical efficiency of the work for repairing automobiles are important factors, and efforts are being made to shorten the painting time and reduce the amount of paint used.

Generally, automotive coatings contain volatile organic compounds (hereinafter referred to as VOCs). VOCs are organic compounds that generally have a sufficiently high vapor pressure under normal conditions to evaporate easily into the atmosphere. They are the cause of global warming that causes greenhouse effect. They react with nitrogen compounds in the air to cause photochemical smog. It is also classified.

Accordingly, a method of reducing the amount of the organic solvent containing VOC in connection with the environmental problems has been studied. A method of using a composition containing a high solid type resin as one method is known, but it has a problem that the physical properties of the coating film are accompanied by a decrease.

Therefore, a fundamental solution to reduce the amount of paint to reduce material costs and reduce environmental pollution is the most demanded.

Automotive coatings consist of several layers of coatings with different efficacies. Classification of coatings by coating process can be roughly divided into the surface adjustment process, intermediate process process and top process process.

The surface conditioning step includes a surface preparation step that includes the evaluation of the damaged area, the cleaning of the damaged area and the removal of foreign objects, the polishing of the old film and the cleaning step to fill the grooves or scratches of the damaged area and smooth the surface, Step, putty polishing and cleaning steps, and the like.

The intermediate stage includes a masking step of a portion where coating is not required, a degreasing step of the intermediate coating portion, a primer-to-spacer intermediate coat application step to increase the corrosiveness and surface smoothness of the damaged portion, a middle coat paint drying step, a middle polishing and cleaning step .

The upper phase processing step includes a secondary masking step in which the upper coating is unnecessary, a color paint application step in which the colors are matched, a transparent paint application step in which gloss is imparted and durability is increased, and finally, a light for finishing the exterior surface And a step of betting and evaluation.

The upper phase processing step can be roughly classified into two processes. 2coat system (double application method) to apply two-part clear coat to increase gloss and durability after applying base coat to match colors on middle coat and 1coat system (Single coating system). The double coating method can be applied to metallic, mica and solid colors, and the single application method is mainly used for solid color products.

In the case of conventional top paint, two to six times of coating are required to cover the middle primer-sensor and to match the colors, and it is necessary to sufficiently cover to minimize the appearance of the top surface and to minimize the color difference value It is because.

In order to minimize the process of color paint, it is necessary to increase the hiding power of the color paint itself. However, since 50 ~ 70 colorants are used in the case of car paint for repairing, it takes a long time and cost to improve the product. As shown in FIG.

Disclosure of the Invention The present invention provides a color primer-spacer coating composition and a method of repairing an automobile using the same, which can reduce the number of coatings of the top coat by having a hiding power and coloring according to the color of the top coat .

The color primer-spacer coating composition according to one embodiment of the present invention comprises 20 to 45% by weight of an acrylic polyol resin having a solid content of 40 to 60% by weight, 15 to 30% by weight of talc, 5 to 15% by weight of barium sulfate, A white primer-sensor composition comprising from 1 to 15% by weight of titanium, from 0.01 to 1% by weight of a urethane reaction promoter and an excess of organic solvent, and from 20 to 45% by weight of an acrylic polyol resin having a solids content of from 40 to 60% by weight, 0.01 to 1% by weight of urethane reaction accelerator, 1 to 3% by weight of carbon black, and 100 to 180 mgKOH / g of an acidic dispersant 0.01 to 30% by weight, barium sulfate of 5 to 15% by weight, titanium dioxide of 1 to 15% To 1% by weight, and an excess of organic solvent.

In one embodiment, the acrylic polyol resin has an acid value of 5 to 30 mgKOH / g, a hydroxyl content of 2 to 7% by weight on a solid basis, a glass transition temperature in the range of 40 to 60 ° C and a Gardner viscosity of Z to Z3 The number average molecular weight is in the range of 2,000 to 10,000, and the molecular weight distribution is 3 or less.

In one embodiment, the acrylic polyol resin is polymerized from a composition comprising 10 to 30 weight percent styrene, 10 to 30 weight percent butyl acrylate, 10 to 30 weight percent hydroxyethyl methacrylate, and an excess of solvent .

In one embodiment, the back urethane reaction promoter includes at least one selected from the group consisting of a metal-based catalyst, a tertiary amine, a carboxylic acid salt of an alkali metal, and a zinc complex compound.

In one embodiment, the organic solvent is selected from the group consisting of xylene, butyl acetate, ethyl acetate, isobutyl methyl ketone, solvent naphtha, 1-methoxy-2-acetoxypropane, propylene glycol methyl ether propionate, At least one selected from the group.

In one embodiment, the organic solvent comprises a mixture of xylene, butyl acetate and ethyl acetate.

In one embodiment, the color primer-spacer coating composition further comprises a curing agent comprising an isocyanate compound.

A method for repairing an automobile according to an embodiment of the present invention includes the steps of applying a color primer-spacer coating composition on a primer to form a primer film, polishing the primer film, and forming a top film on the polished primer film Wherein the mixing ratio of the white primer-sensor composition and the black primer-sensor composition is determined according to the color of the top coat.

According to the present invention, the number of coatings of the top coat can be reduced by mixing and coloring the color primer-surface coating composition (white, black) in a color that can enhance the hiding of the top. Therefore, compared with the conventional painting process, it is possible to reduce the time and material cost as well as the work process, thereby minimizing the influence on the atmospheric environment.

1 is a flowchart illustrating a method of repairing an automobile according to an embodiment of the present invention.

Hereinafter, a color primer-spacer coating composition according to an embodiment of the present invention and a method for repairing an automobile using the same will be described.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Color primer-surfacer paint composition

The color primer-spacer coating composition according to an embodiment of the present invention may include an acrylic polyol resin, talc, barium sulfate, titanium dioxide, a urethane reaction promoter, and an organic solvent.

For example, the color primer-spacer coating composition may comprise 20 to 45% by weight of an acrylic polyol resin having a solids content of 40 to 60% by weight, 15 to 30% by weight of talc, 5 to 15% by weight of barium sulfate, 15% by weight, a urethane reaction promoter of 0.01 to 1% by weight, and an extra organic solvent. For example, the content of the organic solvent may be 10 to 30% by weight based on the total weight of the coating composition. The color primer-spacer coating composition can be used as a subject.

For example, the acrylic polyol resin may be polymerized from a composition comprising from 10 to 30% by weight of styrene, from 10 to 30% by weight of butyl acrylate and from 10 to 30% by weight of hydroxyethyl methacrylate and an excess of solvent have. The solvent may include xylene, butyl acetate, ethyl acetate, methyl isobutyl ketone, and the like.

For example, the acrylic polyol resin may have a butyl acetate (solvent) content of 40 to 60 wt%, an acid value of 5 to 30 mgKOH / g, a hydroxyl value of 2 to 7 wt% based on solids, a glass transition temperature 60 ° C, Gardner viscosity in the range of Z to Z3, number average molecular weight in the range of 2,000 to 10,000, and molecular weight distribution in the range of 3 or less.

If the content of hydroxyl groups in the acrylic polyol resin is 2% by weight or less, the physical properties of the coating film formed from the paint may be poor. When the content of the hydroxyl group exceeds 7% by weight, the effect of shortening the working time can be reduced by an increase in the drying time. Accordingly, the content of hydroxyl groups in the acrylic polyol resin is preferably in the range of 2 to 7 wt%, more preferably 1 to 3 wt%.

When the glass transition temperature of the acrylic polyol resin is 40 캜 or lower, the abrasiveness of the coating film is poor. When the glass transition temperature exceeds 60 캜, the mechanical properties such as impact resistance, flexural resistance, and adhesion deteriorate. Therefore, the glass transition temperature of the acrylic polyol resin may preferably be 40 to 60 캜.

The acrylic polyol resin may have a solid content of 40 to 60 wt%, and when the solid content satisfies the above condition, the acrylic polyol resin may be included in the range of 20 to 45 wt% based on the total weight of the coating composition. If the content of the acrylic polyol resin is less than 25% by weight, the physical properties of the coating film may be deteriorated. If the content of the acrylic polyol resin exceeds 45% by weight, the appearance of the primer may be deteriorated. Therefore, the content of the acrylic polyol resin is preferably 20 to 45% by weight.

The talc improves the filling function in the coating composition and can improve the adhesion with the top coat formed on the coating film. The content of the talc may be 15 to 30% by weight based on the total weight of the coating composition. When the content of the talc is less than 15% by weight, the adhesion with the top coat may deteriorate and the filling function may be deteriorated. If the content of the talc exceeds 30% by weight, the dispersibility of the coating composition may be deteriorated due to the high viscosity.

In the coating composition, barium sulfate can improve the filling function and the particle size. The barium sulfate may have an average particle size in the range of 2 to 9 mu m. When the average particle size is in the above range, the oil absorption is low and the application may be easy. The content of barium sulfate may be 5 to 15% by weight based on the total weight of the coating composition. If the content of barium sulfate is less than 5% by weight, the filling function and the effect of improving the particle size are insufficient. If the content is more than 15% by weight, the adhesion and physical properties of the coating film may be deteriorated.

As the titanium dioxide, an anatase or rutile type may be used. The titanium dioxide may facilitate the concealment of the underlying or substrate and may embody the color of the primer-spacer, for example white. The content of the titanium dioxide may be 1 to 15% by weight based on the total weight of the coating composition. If the content of titanium dioxide is less than 1% by weight, the hiding power may be lowered and the function as a primer-spacer may be deteriorated. If it exceeds 15% by weight, the hiding power may be improved but other properties of the coating film may be deteriorated.

For example, the urethane reaction promoter may include a metal catalyst, a tertiary amine, a carboxylic acid salt of an alkali metal, a zinc complex compound, and the like.

For example, the metal-based catalyst may include dibutyltin dilaurate, dibutyltin diacetate, and the like. For example, the tertiary amine can be selected from the group consisting of triethylamine, triethylethanolamine, 1,4-diazo cyclooctane, 2-dimethylaminoethyl, trimethylaminoethylethanolamine, pentamethyldiethylenetriamine, dimethylethanolamine , Ethylmorphyrin, dimethylaminoethylmorpholine, dimethylcyclohexylamine, and the like. These may be used alone or in combination.

The content of the urethane reaction promoter may be 0.01 to 1% by weight based on the total weight of the coating composition. If the content of the urethane reaction promoter is less than 0.01% by weight, it is difficult to exert its function as a catalyst, and sufficient reaction with the curing agent is not achieved. On the other hand, if the content exceeds 1% by weight, the usable time of the paint becomes short, and the workability and storage property may be lowered.

The organic solvent is intended to impart an appropriate boiling point and rheological property to the coating composition.

For example, the organic solvent includes xylene, butyl acetate, ethyl acetate, isobutyl methyl ketone, solvent naphtha, 1-methoxy-2-acetoxypropane, propylene glycol methyl ether propionate, toluene and the like , Which may be used alone or in combination, preferably a mixture of butyl acetate, ethyl acetate and xylene.

The color primer-spacer coating composition according to another embodiment of the present invention may further include carbon black and a wetting and dispersing agent. For example, the coating composition may comprise 20 to 45% by weight of an acrylic polyol resin having a solids content of 40 to 60% by weight, 15 to 30% by weight of talc, 5 to 15% by weight of barium sulfate, 1 to 15% 0.01 to 1% by weight of a urethane reaction promoter, 1 to 3% by weight of carbon black, 0.01 to 1% by weight of a wetting and dispersing agent having an acid value of 100 to 180 mgKOH / g, and an excess of organic solvent.

For example, the content of the organic solvent may be 10 to 30% by weight based on the total weight of the coating composition. The color primer-spacer coating composition can be used as a subject, and black can be realized by including carbon black.

The content of the carbon black may be 1 to 3% by weight based on the total weight of the coating composition. When the content of the carbon black is less than 1% by weight, the blackness is low, which is difficult to use as a black subject. When the content of the carbon black exceeds 3% by weight, viscosity increases during dispersion due to the skewness of carbon black, The screen of the ring mill may block and the paint may flow back during the dispersion.

The wetting and dispersing agent can prevent sedimentation of an inorganic filler and pigments having a high specific gravity among constituents of the coating composition and prevent color separation. The wet dispersant may be a controlled agglomerated type, for example, having a solid content of 30 to 70% by weight and an acid value of 100 to 180 mgKOH / g.

The content of the wetting and dispersing agent may be 0.01 to 1% by weight based on the total weight of the coating composition. If the content of the wetting and dispersing agent is less than 0.01% by weight, the effect of preventing sedimentation may be insufficient. If the content of the wetting and dispersing agent is more than 1% by weight, physical properties of the coating film may be deteriorated.

The wet dispersant may be one conventionally used in the field of coating compositions, for example, BYK-P-104 or the like may be used.

The coating composition may be used in combination with a curing agent containing an isocyanate compound. For example, the isocyanate compound may include hexamethylene diisocyanate and the like.

In one embodiment, the color primer-spacer coating composition can be used by mixing a white coating composition and a black coating composition. For example, the color primer-spacer coating composition may comprise 20 to 45% by weight of an acrylic polyol resin having a solids content of 40 to 60% by weight, 15 to 30% by weight of talc, 5 to 15% by weight of barium sulfate, By weight of an acrylic polyol resin having a solids content of 40 to 60% by weight, 20 to 45% by weight of talc, 15 to 30% by weight of barium From 0.01 to 1% by weight of a wet dispersant having an acid value of from 100 to 180 mgKOH / g and from 5 to 15% by weight of sulfur dioxide, from 1 to 15% by weight of titanium dioxide, from 0.01 to 1% by weight of a urethane reaction promoter, from 1 to 3% By weight of an organic solvent.

According to the present invention, it is possible to reduce the time and material cost compared to the conventional painting step by mixing the paint composition (white or black) with the color which can increase the concealment of the top and by using the coloring or alone, The work process is reduced and the effect on the atmospheric environment is also minimized.

How to repair your car

1 is a flowchart illustrating a method of repairing an automobile according to an embodiment of the present invention.

Referring to FIG. 1, according to an automobile repairing method according to an embodiment of the present invention, a color primer-spacer coating composition is applied on a primer (S10).

The undercoat to which the color primer-spacer coating composition is applied can be a damaged part of the automobile. Before applying the color primer-spacer coating composition, it may be necessary to mask the intact portion, to clean the damaged portion, to remove the foreign material, to preliminarily polish, to apply and dry the putty, A polishing step may be performed in advance.

The color primer-spacer coating composition may comprise a mixture of a white primer-to-spacer coating composition and a black primer-to-spacer coating composition for tinting. The white primer-spacer coating composition comprises 20 to 45% by weight of an acrylic polyol resin having a solids content of 40 to 60% by weight, 15 to 30% by weight of talc, 5 to 15% by weight of barium sulfate, 1 to 15% 0.01 to 1% by weight of a urethane reaction promoter, and an excess of organic solvent. The black primer-spacer coating composition comprises 20 to 45% by weight of an acrylic polyol resin having a solids content of 40 to 60% by weight, 15 to 30% by weight of talc, 5 to 15% by weight of barium sulfate, 1 to 15% 0.01 to 1% by weight of a urethane reaction promoter, 1 to 3% by weight of carbon black, 0.01 to 1% by weight of a wet dispersant having an acid value of 100 to 180 mgKOH / g, and an excess of organic solvent. The color plyer-to-spacer coating composition may be applied in combination with a curing agent portion containing an isocyanate compound.

The mixing ratio of the white primer-spacer coating composition to the black primer-spacer coating composition can be adjusted according to the color of the top coat formed subsequently.

For example, the color primer-spacer coating composition may be sprayed onto the sub- strate through a spray.

After coating the color primer-spacer coating composition, the intermediate primer layer is formed by drying (S20). For example, the drying may be carried out at 50 to 80 ° C.

Next, the intermediate coat is polished (S30). The undercoating film may have a surface of irregular shape that is not flat. By smoothing the surface of the intermediate film through the polishing step, it is possible to prevent deterioration of the outer appearance and lowering of the adhesion of the top coat film.

Next, a top coat is formed on the polished intermediate coat. The process and composition for forming the top coat may be the same as the conventional top coat formation process and composition. For example, the top coat process step may include a second masking step in which the top coat is not needed, a color coat application step to match the colors, a clear coat application step to provide gloss and increase durability, and finally, A light emitting step for finishing, and the like.

According to the present invention, by using the color primer-spacer coating composition to form the intermediate film, it is possible to reduce the time and material cost required for the repair by reducing the use of the color paint in the top film forming step.

Hereinafter, the constitution and effects of the present invention will be described in more detail with reference to concrete examples and experimental examples.

Example 1 (white)

35% by weight of acrylic polyol resin (N3-0355, Norul paint) obtained by polymerizing styrene, butyl acrylate and hydroxyethyl methacrylate, 9% by weight of butyl acetate, 8% by weight of ethyl acetate, 4.5% A coating composition A as a main composition was prepared by mixing 10 wt% of sulfate (Korean semiconductor), 20 wt% of talc (Youngwoo Resources), 13 wt% of titanium dioxide (Cosmo Chemical), and 0.5 wt% of triethylamine as a urethane reaction promoter .

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

The coating composition A and the coating composition B were mixed in a volume ratio of 4/1 to prepare a primer-surface coating composition (white).

Example 2 (white)

40 wt% of acrylic polyol resin (N3-0355) obtained by polymerizing styrene, butyl acrylate and hydroxyethyl methacrylate, 9 wt% of butyl acetate, 8 wt% of ethyl acetate, 4.5 wt% of xylene, 9% by weight), talc (Youngwoo Resources) 19% by weight, titanium dioxide (Cosmo Chemical Co.) 10% by weight and triethylamine as a urethane reaction accelerator 0.5% by weight were mixed to prepare Coating Composition A as a main composition.

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

The coating composition A and the coating composition B were mixed in a volume ratio of 4/1 to prepare a primer-surface coating composition (white).

Comparative Example 1 (white)

40 wt% of acrylic polyol resin (N3-0355) obtained by polymerizing styrene, butyl acrylate and hydroxyethyl methacrylate, 9 wt% of butyl acetate, 8 wt% of ethyl acetate, 4.5 wt% of xylene, A coating composition A as a main composition was prepared by mixing 12.5% by weight of silicon dioxide, 25% by weight of talc (Youngwoo Resources), 0.5% by weight of titanium dioxide (Cosmo Chemical) and 0.5% by weight of triethylenediamine as a urethane reaction promoter.

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

The coating composition A and the coating composition B were mixed in a volume ratio of 4/1 to prepare a primer-surface coating composition (white).

In order to evaluate the physical properties of the coating films prepared using the coating compositions prepared according to Examples 1 and 2 and Comparative Example 1, the following specimens were prepared.

The specimens surface-treated with zinc phosphate were degreased with a Haikyk-Cleaner DR-180, and the primer-surface coating composition prepared according to Examples 1 and 2 and Comparative Example 1 was applied to a thickness of about 40 to 60 mu m, . After a set time of about 10 minutes, it was heat-treated at about 60 DEG C for about 30 minutes. The primer-surfacer was polished to 400 necks, and then the hiccup base coat metallic color was applied to a thickness of about 15 to 20 mu m. After about 10 minutes, the Haikyukuri coat master clear LV was coated twice to a thickness of about 40 to 60 mu m. After a set time of about 10 minutes, the sample was heat-treated at about 60 ° C for about 30 minutes and left at room temperature for 7 days.

The coating composition A and the coating composition B were mixed so that the hydroxy equivalent and the isocyanate equivalent were 1: 0.8-1.2. The mixed composition was allowed to reach 12 to 16 seconds with a Ford Cup # 4 viscometer at a relative humidity of 60% RH, temperature of 25 占 폚.

The physical properties of the cured coating film samples were measured as follows, and the results thus obtained are shown in Table 1 below.

1) Topical viscosity: Viscosity was measured at 25 ° C with a KU (krebs stomer) viscometer.

2) Spray workability: The worker confirmed the sprayability, wettability, and edge dustiness during spraying.

3) Surface spreadability: The operator confirmed the surface spreadability of the coating after spraying.

4) Adhesiveness: A cross-cut of 2 mm was made by sticking with a scotch tape and then peeling off.

5) Impact resistance: The weight of the coating was measured by dropping a weight of 500 grams.

6) Flexural strength: Measured by a flexural tester of 3/16 "diameter.

7) Hiding power: The number of coatings for 100% coverage of the surface was measured.

8) Water Resistance: The specimen was immersed in water at 40 ° C for 7 days to measure the gloss loss and defect occurrence of the coating film.

9) Water resistance: Water resistance After 7 days, it was allowed to stand at room temperature for 1 day and then tested for adhesion.

10) Number of coatings: The number of coatings was measured at a level where the coating was completely concealed.

Table 1

Test specimens were prepared in the same manner as the coating compositions prepared according to Examples 1 to 2 and Comparative Example 1. As a result, the coatings prepared with the compositions according to Examples 1 and 2 showed coverings of the surface only twice. However, the coating film prepared with the composition according to Comparative Example 1 showed poor hiding power requiring four coatings.

In order to further examine the physical properties of the coating composition (white) according to the embodiment of the present invention, the following Example 3 and Comparative Examples 2 and 3 were further carried out.

Example 3 (white)

30 wt% of acrylic polyol resin (N3-0355) obtained by polymerizing styrene, butyl acrylate and hydroxyethyl methacrylate, 9 wt% of butyl acetate, 8 wt% of ethyl acetate, 4.5 wt% of xylene, A coating composition A as a main composition was prepared by mixing 8% by weight of silicon carbide, 30% by weight of talc (Youngwoo Resources), 10% by weight of titanium dioxide (Cosmo Chemical) and 0.5% by weight of triethylamine as a urethane reaction promoter.

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

The coating composition A and the coating composition B were mixed in a volume ratio of 4/1 to prepare a primer-surface coating composition (white).

Comparative Example 2 (white)

30 wt% of acrylic polyol resin (N3-0355) obtained by polymerizing styrene, butyl acrylate and hydroxyethyl methacrylate, 9 wt% of butyl acetate, 8 wt% of ethyl acetate, 4.5 wt% of xylene, A coating composition A, which is a main composition, was prepared by mixing 5% by weight of talc, 34% by weight of talc (semiconductor), 9% by weight of titanium dioxide (Cosmo Chemical) and 0.5% by weight of triethylamine as a urethane reaction promoter.

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

The coating composition A and the coating composition B were mixed in a volume ratio of 4/1 to prepare a primer-surface coating composition (white).

Comparative Example 3 (White)

40 wt% of acrylic polyol resin (N3-0355) obtained by polymerizing styrene, butyl acrylate and hydroxyethyl methacrylate, 9 wt% of butyl acetate, 8 wt% of ethyl acetate, 4.5 wt% of xylene, A coating composition A as a main composition was prepared by mixing 15% by weight of talc (semiconductor), 10% by weight of talc (Youngwoo Resources), 13% by weight of titanium dioxide (Cosmo Chemical) and 0.5% by weight of triethylamine as a urethane reaction promoter.

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

The coating composition A and the coating composition B were mixed in a volume ratio of 4/1 to prepare a primer-surface coating composition (white).

Specimens were prepared using the paint compositions (white) prepared according to Example 3 and Comparative Examples 2 and 3 as described above, and the properties were tested. The preparation of the specimens and the physical properties were carried out in the same manner as in the case of obtaining the results shown in Table 1 above. The results thus obtained are shown in Table 2 below.

Table 2

In Example 3, even when the content of talc was increased up to 30% by weight, it was confirmed that the viscosity and the workability and physical properties were not influenced only by the increase of the viscosity. However, when the amount of talc is excessively used as in Comparative Example 2, it can be seen that the viscosity is high and the spraying workability is not good due to the increase of the oil absorption amount.

In addition, as in Comparative Example 3, when the content of the active substance is less than 15% by weight, it is found that the adhesion is lowered.

Example 4 (black)

35 wt% of acrylic polyol resin (N3-0355) obtained by polymerizing styrene, butyl acrylate and hydroxyethyl methacrylate, 9 wt% of butyl acetate, 8 wt% of ethyl acetate, 5 wt% of xylene, 3 wt% of titanium dioxide (Cosmo Chemical), 1.5 wt% of CARBON BLACK (MITSUBISHI RAYON), 0.5 wt% of wet dispersant (BYK-P-104) And 0.5% by weight of triethylamine as an accelerator were mixed to prepare a coating composition A as a main composition.

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

The coating composition A and the coating composition B were mixed in a volume ratio of 4/1 to prepare a primer-surface coating composition (black).

Example 5 (black)

35 wt% of acrylic polyol resin (N3-0355) obtained by polymerizing styrene, butyl acrylate and hydroxyethyl methacrylate, 9 wt% of butyl acetate, 8 wt% of ethyl acetate, 5 wt% of xylene, 3 wt% of CARBON BLACK (MITSUBISHI RAYON), 0.5 wt% of wet dispersant (BYK-P-104), 10 wt% of urethane reaction And 0.5% by weight of triethylamine as an accelerator were mixed to prepare a coating composition A as a main composition.

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

The coating composition A and the coating composition B were mixed in a volume ratio of 4/1 to prepare a primer-surface coating composition (black).

Comparative Example 4 (black)

35 wt% of acrylic polyol resin (N3-0355) obtained by polymerizing styrene, butyl acrylate and hydroxyethyl methacrylate, 9 wt% of butyl acetate, 8 wt% of ethyl acetate, 4.5 wt% of xylene, A mixture of 3 wt% of titanium dioxide (Cosmo Chemical), 1.5 wt% of CARBON BLACK (MITSUBISHI RAYON), and 0.5 wt% of triethylamine as a urethane reaction promoter, To prepare a phosphorus coating composition A.

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

The coating composition A and the coating composition B were mixed in a volume ratio of 4/1 to prepare a primer-surface coating composition (black).

Comparative Example 5 (Black)

35 wt% of acrylic polyol resin (N3-0355) obtained by polymerizing styrene, butyl acrylate and hydroxyethyl methacrylate, 9 wt% of butyl acetate, 8 wt% of ethyl acetate, 5 wt% of xylene, (BYK-P-104) of 11 wt%, a talc (Youngwoo Resources) of 23 wt%, titanium dioxide (Cosmo Chemical) of 3 wt%, CARBON BLACK (MITSUBISHI RAYON) of 5 wt%, a wet dispersant And 0.5% by weight of triethylamine as an accelerator were mixed to prepare a coating composition A as a main composition.

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

The coating composition A and the coating composition B were mixed in a volume ratio of 4/1 to prepare a primer-surface coating composition (black).

Specimens were prepared using the paint compositions (black) prepared according to Examples 4 and 5 and Comparative Examples 4 and 5, and the properties were tested. For color separation, the samples were allowed to stand for 60 days at room temperature (25 ° C) The degree of separation was measured. The preparation of the specimens and the physical property tests were carried out in the same manner as in the case of obtaining the results shown in Tables 1 and 2 above. The results thus obtained are shown in Table 3 below.

Table 3

(Black) prepared according to Examples 4 and 5 and Comparative Examples 4 and 5 were produced in the same manner as in Example 4. As a result, the coating film prepared from the compositions according to Examples 4 and 5 was found to have a Color separation did not occur even after 60 days, and the spray viscosity and workability were excellent. However, it can be seen that, as in Comparative Example 4, if a wetting and dispersing agent is not used, color separation occurs at room temperature (25 캜).

Also, as in Comparative Example 5, when the content of CARBON BLACK Pigment exceeds 3%, it can be seen that the dispersibility of the CARBON BLACK pigment is greatly increased due to the rickleness of the pigment, and the result of poor spray viscosity and workability is invited.

Example 6 (single coating system)

A coating composition A was prepared in the same manner as in Example 3 (white).

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

varnish The composition A and the coating composition B were mixed at a ratio of 4/1 in a volume ratio to prepare a primer-surface coating composition.

As the top coat, Haikyu Unity Cream White UD-3 (2K topcoat) of Noru Paint Co., Ltd. was used.

Comparative Example 6 (single coating method)

PS-440 (gray) was used as a primer-surface coating and HAKKU UNITAN CURI WHITE UD-3 (2K topcoat) as a top coat paint.

(White) and Example 5 (black) were used alone or in combination to compare the degree of enhancement of hiding power and the amount of coating material used for coloring the top coat through the coloring of the primer- Using the coating composition of the spacer, the work was carried out in accordance with the process according to the coating specification.

Since the above-mentioned process steps can be divided into a single coating method and a double coating method, both of the above processes are examined.

In the single coating method, a 30X30 cm specimen surface-treated with zinc phosphate was degreased with a Haikyk-Cleaner DR-180 and coated with a primer-spacer coating composition to a thickness of about 40 to 60 μm. After a set time of about 10 minutes, it was heat-treated at about 60 DEG C for about 30 minutes. After polishing 400 trees, the two-part type HYKYU UNIT of NORU Paint Co., Ltd. was applied until the primer-spacer was completely hidden. After a set time of about 10 minutes, the sample was heat-treated at about 60 ° C for about 30 minutes and left at room temperature for 7 days.

The specimens were prepared using the coating materials prepared according to Example 6 and Comparative Example 6 of the single coating method as described above, and the properties were tested. In the case of the covering power, Haikyu Unity Cream White UD-3 2K topcoat) and the amount of paint used were measured. The preparation of the specimens and the physical property tests were carried out in the same manner as in the case of obtaining the results shown in Tables 1 and 2 above. The results thus obtained are shown in Table 4 below.

Table 4

In the case of Example 6, it was confirmed that the number of coatings of 2K topcoat for covering the primer-sensor was 1.5 times, and the amount of necessary paint was 100 g. However, in Comparative Example 6, the number of times of top coating was 2.5 times, and the amount of necessary paint was 165 g.

Example 7 (single coating system)

40% by weight of the paint composition of Example 3 (white) and 60% by weight of the paint composition of Example 5 (black) were mixed to prepare Coating Composition A as a main composition.

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

varnish The composition A and the coating composition B were mixed at a ratio of 4/1 in a volume ratio to prepare a primer-surface coating composition.

As the top coat paint, ASE-3 (2K topcoat) from Hokkyu Uniman Green Co., Ltd. was used.

Comparative Example 7 (single coating method)

PS-440 (gray) was used as a primer-surface coating and Haikyu Primer-ASE-3 (2K topcoat) as a top coat paint.

The specimens were prepared using the coating materials prepared according to Example 7 and Comparative Example 7 of the single coating method as described above, and the properties were tested. For the hiding power, Haikyu Uniman Misty Green ASE-3 2K topcoat) and the amount of paint used were measured. The preparation of the specimens and the physical property tests were carried out in the same manner as in the case of obtaining the results shown in Tables 1 and 2 above. The results thus obtained are shown in Table 5 below.

Table 5

In the case of Example 7, it was confirmed that the number of coatings of 2K topcoat for covering the primer-sensor was 1.5 times, and the amount of necessary paint was 100 g. However, in the case of Comparative Example 7, the number of times of top coating was twice and the amount of necessary paint was found to be 135 g.

Example 8 (single coating method)

The coating composition A was prepared in the same manner as in Example 5 (black).

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

varnish The composition A and the coating composition B were mixed at a ratio of 4/1 in a volume ratio to prepare a primer-surface coating composition.

As the top coat, Haikyuuiti ebony black EB (2K topcoat) of Noru Paint Co., Ltd. was used.

Comparative Example 8 (single coating method)

PS-440 (gray) was used as a primer-surface coating and HS-240 topcoat was used as a top coating.

The specimens were prepared using the coating materials prepared according to Example 8 and Comparative Example 8 of the single coating method described above and the properties were tested. For the hiding power, 2K topcoat EB ) Were measured and the amount of paint used was measured. The preparation of the specimens and the physical property tests were carried out in the same manner as in the case of obtaining the results shown in Tables 1 and 2 above. The results thus obtained are shown in Table 6 below.

Table 6

In the case of Example 8, it was confirmed that the number of coatings of 2K topcoat for covering the primer-sensor was 1.5 times, and the amount of paint required was 90g. However, in Comparative Example 6, the number of times of top coating was 2.5 times, and the amount of necessary paint was 150 g.

Example 9 (Double coating method)

A coating composition A was prepared in the same manner as in Example 3 (white).

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

varnish The composition A and the coating composition B were mixed at a ratio of 4/1 in a volume ratio to prepare a primer-surface coating composition.

The base coat of Crude White UD-3 (basecoat) and the base coat of Noru Paint Co., Ltd. and the Haikyukuri coat master clear LV (Cree coat) of Noru paint Co., Ltd. were used as the top coat paint.

Comparative Example 9 (double coating method)

Primer-Surfacer was used as the base coat of Crude White UD-3 (base coat) of Noru Paint Co., Ltd., and Haikyu Master Crier LV (Base Coat) of Noru Paint Co., Cree coat) was used.

In the double coating method, the specimen surface-treated with zinc phosphate was degreased with a Haikyk-Cleaner DR-180 and coated with a primer-spacer coating composition to a thickness of about 40 to 60 μm. After a set time of about 10 minutes, it was heat-treated at about 60 DEG C for about 30 minutes. After polishing 400 trees, the base coat of the Haikyu Co., Ltd. was applied until the primer-surfacer was completely concealed. After about 10 minutes, the Haikyukuri coat master clear LV was coated twice to a thickness of about 40 to 60 mu m. After a set time of about 10 minutes, the sample was heat-treated at about 60 ° C for about 30 minutes and left at room temperature for 7 days.

The specimens were prepared using the coating materials prepared according to Example 9 and Comparative Example 9 of the double coating method described above, and the properties were tested. In the case of covering power, Haikyu Base Coat Creamy White UD-3 Base coat) and the amount of paint used were measured. The preparation of the specimens and the physical property tests were carried out in the same manner as in the case of obtaining the results shown in Tables 1 and 2 above. The results thus obtained are shown in Table 7 below.

Table 7

In the case of Example 9, it was confirmed that the number of coatings of the base coat for concealing the primer-sensor was three times, and the amount of the required paint was 110 g. However, in Comparative Example 9, the number of times of top coating was 4.5 times, and the amount of necessary paint was 165 g.

Example 10 (Double coating method)

60% by weight of the paint composition of Example 3 (white) and 40% by weight of the paint composition of Example 5 (black) were mixed to prepare Coating Composition A as a main composition.

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

varnish The composition A and the coating composition B were mixed at a ratio of 4/1 in a volume ratio to prepare a primer-surface coating composition.

The base coat of gray paint TAK-8 (basecoat) of Hoku Kyuko Co., Ltd. and the base coat of HokuKuri Coat Master Cree LV (Cree coat) of Noru paint Co., Ltd. were used as the top coat paint.

Comparative Example 10 (double coating method)

Primer-Surfacer was a high-quake primer of PS-440 (gray) and a top coat of gray paint, a base coat of gray paint TAK-8 (base coat) Cree coat) was used.

The specimens were manufactured using the coating materials prepared in Example 10 and Comparative Example 10, and the properties were tested. For the hiding power, Haikyu base coat gray titanium TAK-8 (Base coat) and the amount of paint used were measured. The preparation of the specimens and the physical property tests were carried out in the same manner as in the case of obtaining the results shown in Tables 1 and 2 above. The results thus obtained are shown in Table 8 below.

Table 8

In the case of Example 10, it was confirmed that the number of times of coating of the base coat for concealing the primer-sensor was 3.5 times, and the amount of necessary paint was 130 g. However, in Comparative Example 10, the number of times of top coating was 4.5 times, and the amount of necessary paint was 165 g.

Example 11 (Double coating method)

The coating composition A was prepared in the same manner as in Example 5 (black).

40 parts by weight of hexamethylene diisocyanate trimer, 40 parts by weight of xylene and 60 parts by weight of butyl acetate were mixed to prepare a coating composition B as a curing agent composition.

varnish The composition A and the coating composition B were mixed at a ratio of 4/1 in a volume ratio to prepare a primer-surface coating composition.

As the top coat, Haikyu Base Coat Ebony Black EB-10 (Base Coat) of Noru Paint Co., Ltd. and Haikyukuri Code Master Crier LV (Cree Court) of Noru Paint Co., Ltd. were used

Comparative Example 11 (double coating method)

Primer-Surfacer is a high-quake primer of PS-440 (gray) and a top coat of EB-10 (basecoat) and a base coat of Haukyu Master Cree LV Cree coat) was used.

The specimens were prepared using the coating materials prepared according to Example 11 and Comparative Example 11 of the double coating method described above, and the properties were tested. For the hiding power, Haikyu Base coat Ebony Black EB-10 Base coat) and the amount of paint used were measured. The preparation of the specimens and the physical property tests were carried out in the same manner as in the case of obtaining the results shown in Tables 1 and 2 above. The results thus obtained are shown in Table 9 below.

Table 9

In the case of Example 11, it was confirmed that the number of times of coating of the base coat for concealing the primer-sensor was twice, and the amount of the necessary paint was 90 g. However, in the case of Comparative Example 11, the number of times of top coating was 4 times, and the amount of necessary paint was 145 g.

In the case of the conventional primer-spacer coating composition, the hue of the product itself is determined, and concealment of the top coat depends on the color of the top coat. Thus, the working time and the amount of the paint usage are increased.

On the other hand, the color primer-spacer coating composition for automobile repair according to the present invention can be mixed with color to increase the hiding of the top cover, and used alone or in combination to reduce the number of painting of the top coat, And the material cost can be reduced as well as the effect on the atmospheric environment can be minimized.

The color primer-spacer coating composition according to the present invention can be used for various paints, in particular for car repair.

Claims (8)

20 to 45 wt% of an acrylic polyol resin having a solid content of 40 to 60 wt%, 15 to 30 wt% of talc, 5 to 15 wt% of barium sulfate, 1 to 15 wt% of titanium dioxide, 0.01 to 1 wt% of a urethane reaction promoter, A white primer-spacer composition comprising an extra organic solvent; And
20 to 45 wt% of an acrylic polyol resin having a solid content of 40 to 60 wt%, 15 to 30 wt% of talc, 5 to 15 wt% of barium sulfate, 1 to 15 wt% of titanium dioxide, 0.01 to 1 wt% of a urethane reaction promoter, A color primer-spacer coating composition comprising a black primer-spacer composition comprising from 1 to 3% by weight of carbon black, from 0.01 to 1% by weight of a wet dispersant having an acid value of from 100 to 180 mg KOH / g and an excess of organic solvent. The acrylic primer composition according to claim 1, wherein the white primer-sensor composition and the acrylic primer-spacer composition have an acid value of 5 to 30 mgKOH / g, a hydroxyl content of 2 to 7% Is in the range of 40 to 60 占 폚, the Gardner viscosity is in the range of Z to Z3, the number average molecular weight is in the range of 2,000 to 10,000, and the molecular weight distribution degree is 3 or less. The acrylic polyol resin of claim 2, wherein the acrylic polyol resin is polymerized from a composition comprising 10 to 30% by weight of styrene, 10 to 30% by weight of butyl acrylate and 10 to 30% by weight of hydroxyethyl methacrylate, ≪ / RTI > The method of claim 1, wherein the urethane reaction promoter of the white primer-sensor composition and the black primer-sensor composition comprises at least one selected from the group consisting of a metal-based catalyst, a tertiary amine, a carboxylic acid salt of an alkali metal, Wherein the color primer-spacer coating composition is a coating composition. 2. The composition of claim 1, wherein the white primer-spacer composition and the organic solvent of the black primer-spacer composition are selected from the group consisting of xylene, butyl acetate, ethyl acetate, isobutyl methyl ketone, solvent naphtha, 1-methoxy- Wherein at least one selected from the group consisting of propane, propylene glycol methyl ether propionate and toluene is contained. 6. The color primer-spacer coating composition of claim 5, wherein the organic solvent comprises a mixture of xylene, butyl acetate and ethyl acetate. The color primer-spacer coating composition according to claim 1, further comprising a curing agent comprising an isocyanate compound. Coating a color primer-spacer coating composition according to any one of claims 1 to 7 on a primer to form a primer film;
Polishing the intermediate membrane; And
And forming a top coat on the polished intermediate film, wherein a mixing ratio of the white primer-sensor composition and the black primer-sensor composition is determined according to the color of the top coat.

Images