JPH10183030A - Method for forming marble-pattern coating film and article with marble pattern formed thereon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for forming a marble-pattern coating film whereby time and labor for cleaning tools or for managing a plurality of coating materials can be saved, enabling cost reduction, and the finishing of the same patterns or color tones is facilitated, reducing the variation in finishing of marble-pattern coating films between coating workers. SOLUTION: In this method, an object is coated with a coating compsn. contg. a pigment component contg. a metal powder (comprising an aluminum powder and/or a mica powder) and/or resin particles, and then the coated object is sprayed with a liq. comprising at least one solvent to cause flooding of the pigment component in the compsn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating composition which imparts a marble-like pattern by spraying a coating surface with a specific mixed liquid after coating a coating composition comprising a specific component on an object to be coated. The present invention relates to an object and a method for coating the same.

[0002]

2. Description of the Related Art In many cases, paints have the purpose of protecting the object to be coated and at the same time imparting an aesthetic appearance. Particularly in the coating of home appliances, miscellaneous goods, stationery, etc., it is important to impart a characteristic pattern. It is one of the themes. The term "pattern-like coating" used herein refers to, for example, a coating that imparts a satin-like pattern to an object to be coated by adding particles or the like to the coating composition, or a low-pressure spray of a paint having thixotropic properties on the object to be coated. Pear-skinned finish paint obtained by applying an appropriate spray coating with a gun.

[0003] One of the coating techniques included in the category of such pattern-like coating is marble-like finish coating. Generally, marble-like coating is a pattern-like coating in which a marble-like pattern is applied to an object to be coated.After applying a colored paint on the object to be coated, another color of paint is applied using a low-pressure spray gun or the like. This is a coating method in which a marble-like patterned coating film is formed by spray coating.

[0004]

However, in such a conventional technique, when a marble pattern paint finish is performed, a paint of another color tone is applied several times after a uniform paint is applied to an object to be coated. Again, the spray coating is performed again, so that it takes time to clean the jig, and there is a problem that it is costly because a plurality of paints need to be managed.
Furthermore, since multiple paints with different colors are applied repeatedly, there are problems such as difficulties in obtaining the same pattern tone finish when performing multiple paints, and differences in the pattern finish by painters. there were.

An object of the present invention is to solve the above-mentioned problems in the marble finish coating that has been conventionally performed, and to form a marble-like patterned coating film that cannot be obtained by the conventional marble finish finish method. It is in the place that was.

[0006]

Means for Solving the Problems In order to solve such a problem, in the present invention, as a method of forming a marble-like patterned coating film, a coating material having a specific composition using a plurality of pigment components having different properties is coated. By applying a spray treatment to the painted surface with a liquid consisting of at least one or more mixed solutions, a plurality of pigment components having different properties contained in the paint constituting the paint film are physically applied to the paint. This makes it possible to form a coating film having a marble finish pattern of a plurality of colors with one kind of paint.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention is directed to spray coating or brush coating of a paint obtained by adding one or both of metal powder and resin particles to a binder resin component constituting the paint. After applying a coating process by a coating method such as, a plurality of pigments having different properties contained in the paint constituting the coating film by spraying the coated surface with a liquid composed of one or more kinds of mixed solutions. A physical color separation phenomenon occurs in the components, and as a result, a coating film having a marble finish pattern of a plurality of colors is obtained.

[0008] Among the specific components of the coating composition used in the present invention, examples of the metal powder include metal powders such as aluminum powder, stainless steel powder, nickel powder, copper powder, and mica powder. The shape of the metal powder is flake, spherical,
An irregular shape, a needle shape and the like can be exemplified, but a flake-like metal powder is preferable. As the metal powder, a powder coated with a resin for the purpose of improving durability or a powder having a surface subjected to a coloring treatment can be used. The proportion of the metal powder used in the paint depends on the desired finished color tone, but is preferably 0% by weight to 50% by weight as the content in the paint film.
More preferably, it is 0% by weight to 30% by weight. If the content is more than 50% by weight, problems such as cracks in the formed coating film occur, which is not preferable.

The resin particles as specific specific components used in the present invention include acrylic resin particles, urethane resin particles, silicone resin particles, nylon resin particles, and the like. These resin particles can be used alone, but it is preferable to use different types of resin particles in combination. The reason for this is that color separation occurs effectively at the stage where physical color separation occurs after painting, so that a sharp finish can be achieved in tone.

The average particle size of the resin particles is 0.1 μm.
m to 100 μm, more preferably 0.5 μm
m to 15 μm. When the thickness is 100 μm or more, the finished surface of the coating is rough, which is not preferable. Also 0.1
A thickness of less than μm is not preferred because color separation hardly occurs at the stage where physical color separation occurs after coating. The particle size distribution of the resin particles used is preferably relatively narrow, and a plurality of types of particles having different average particle sizes can be used in combination. This depends on the finished state and the pattern, and requires a prescription according to the color tone.

Although it is possible to use transparent resin particles depending on the color tone of the finish, it is preferable to use colored resin particles. This is because the pattern formed after the physical color separation after painting becomes clear. The proportion of the resin particles used in the present invention in the paint depends on the desired finished color tone, but is preferably 0% by weight to 50% by weight in the paint film. More preferably, it is 0% by weight to 30% by weight. 5
If the content is 0% by weight or more, it is not preferable because defects such as cracks occur in the formed coating film.

In the specific coating composition used in the present invention, one or both of metal powder and resin particles are essential components, but a binder resin colored with a coloring pigment according to a finished color tone is used. It is preferred to use The reason for this is that the pattern after the physical color separation after painting becomes clear and sharp.

As the binder resin used in the coating composition of the present invention, it is possible to exemplify all resins generally used for coating depending on the suitability of the object to be coated. However, in consideration of the field in which marble-like paints are used, a two-pack binder in which a curing agent such as polyisocyanate is added to a lacquer-type binder or a polyol-type binder immediately before coating is preferred.

The coating composition of the present invention may contain a matting agent, a viscosity modifier, a leveling agent, a defoaming agent, a solvent, an ultraviolet absorber, a light stabilizer, a reaction catalyst, and the like, if necessary.

According to the present invention, after applying the coating composition, a mixed solution comprising one or more solvents is treated by a method such as spraying, so that a marble-like patterned coating film can be finished. Examples of the components that can be used in the mixed solution include a hydrocarbon organic solvent, a ketone organic solvent, an alcohol organic solvent, an ester organic solvent, and water. These solvents may be used as a mixture of one or more kinds. However, a combination of components that cause separation of the liquids to be used according to the finished pattern or color tone is also possible. In this case, a surfactant or the like can be used for the purpose of homogenizing the mixed solution.

As the surfactant, an anionic surfactant, a cationic surfactant, a nonionic surfactant, or the like can be used according to the properties and type of the mixed liquid to be used, and the amount and type are adjusted according to the finished pattern state. Is done.

In the marble pattern finish coating method according to the present invention, when a lacquer-type binder is used in the coating composition, it is possible to carry out the process of forming the marble pattern immediately after completion of the coating, but it is also possible to carry out preliminary drying. It is preferable to form a marble-like pattern after performing the above method in terms of pattern reproduction.

On the other hand, when a coating composition using a reactive binder resin is used, a difference may appear in a pattern formed depending on a standing time after coating or pre-drying conditions. It is preferable to perform preliminary drying under mild conditions after coating, and to form a marble-like pattern within a relatively short time after preliminary drying.

After completion of the formation of the marble pattern, drying can be performed according to the used resin, solvent, and the like.

[0020]

EXAMPLES Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited thereto.

Example 1 Synthesis of Binder Resin for Paint (hereinafter referred to as Binder Resin A)

200 parts of toluene and 200 parts of n-butanol were charged into a 1-liter four-necked flask equipped with a nitrogen inlet tube, a thermometer, a cooling tube, a dropping funnel, and a stirring device.
Heated to ° C. Methyl methacrylate 150 prepared separately
Part, n-butyl methacrylate 117.5 parts, tertiary butyl methacrylate 100 parts, 2-hydroxyethyl methacrylate 5 parts, styrene 25 parts, methacrylic acid 2.5 parts, tertiary butyl peroxy 2-ethylhexanoate The two-part mixture was added to the flask using a dropping funnel over 2 hours. 30 after completion of addition
0.5 parts of tertiary butyl peroxy 2-ethylhexanoate was added every 4 minutes for a total of 4 times. Further, the temperature inside the flask was kept at 90 ° C. for 120 minutes, and then the temperature was raised to 110 ° C. to keep the temperature inside the flask at 110 ° C.
Hold for 0 minutes. Thereafter, 100 parts of toluene and 100 parts of n-butanol were added, the mixture was cooled to room temperature, and the reaction was terminated to obtain a binder resin A.

Adjustment of thinner for dilution (hereinafter referred to as thinner B)
Call it)

Ethyl acetate 20 parts, isobutanol 30
Parts, 30 parts of toluene and 20 parts of diacetone alcohol were mixed to obtain Thinner B.

Adjustment of black enamel paint (hereinafter referred to as black paint C)

50 parts by weight of binder resin A, FW-20
0 (carbon black manufactured by Degussa Co., Ltd.), 30 parts by weight of toluene, and 18 parts by weight of ethyl acetate were mixed, placed in a plastic container, and dispersed with 200 parts by weight of an iron bead having a diameter of 3 mm for 5 hours using a paint shaker. Thus, a black enamel paint C was obtained.

Adjustment of white enamel paint (hereinafter referred to as white paint D)

50 parts by weight of binder resin A, R-96
0 (titanium white manufactured by DuPont) and 30 parts by weight of toluene are mixed, put in a plastic container, and dispersed with 200 parts by weight of zircon beads having a diameter of 3 mm on a paint shaker for 5 hours to give a white enamel paint D
I got

Adjustment of clear paint (hereinafter referred to as clear paint E)

50 parts by weight of the binder resin A, 30 parts by weight of toluene, and 20 parts by weight of ethyl acetate were mixed and stirred to obtain a clear coating material E.

Composition of paint (hereinafter referred to as gunmetal paint F)

The above clear paint E 60 parts by weight, FZ-T
5 parts by weight of 60b (aluminum flake manufactured by Toyo Aluminum Co., Ltd.), 34.5 parts by weight of black paint C, and 0.5 part by weight of white paint D were mixed and stirred to obtain gunmetal paint F.

Preparation of mixed solution for developing marble-like pattern (hereinafter referred to as mixed solution G)

A mixed solution G was obtained by mixing and stirring 50 parts by weight of toluene, 20 parts by weight of anone, and 30 parts by weight of ethyl acetate.

[0035] Painting process

The paint was adjusted by adding the thinner B in such an amount that the viscosity of the gunmetal paint F reached 10 seconds with a Ford cup # 4, and spray-painted on an ABS blackboard using a spray gun. After completion of the coating, the mixed solution G was immediately preliminarily dried in a box-type drying oven at 60 ° C. for 3 minutes.
Was sprayed on the coating film using a low-pressure spray gun. After the spray treatment of the mixed solution G was completed, setting was performed at room temperature for 5 minutes, and then drying was performed again in a box-type drying oven at 60 ° C. for 30 minutes to complete all the steps.

The finished state had a marble-like pattern, and the marble tone was composed of silver, black, and various gray colors.

Example 2

Preparation of mixed solution for developing marble-like pattern (hereinafter referred to as mixed solution H)

A mixed solution H was obtained by mixing and stirring 50 parts by weight of toluene, 20 parts by weight of anone, 29.6 parts by weight of ethyl acetate, and 0.4 parts by weight of sodium dodecylbenzenesulfonate.

A marble pattern coating was performed using the same paint and process as in Example 1 except that the mixed solution H was used as the mixed solution for marble pattern development.

A coating film having a marble-like finish different from that of Example 1 was obtained. Marble tones consisted of silver, black and various gray colours.

Embodiment 3

Composition of paint (hereinafter referred to as gunmetal paint I)

[0045] 65 parts by weight of paint E, FZ-T60b
5 parts by weight (aluminum flake manufactured by Toyo Aluminum Co., Ltd.), 25 parts by weight of black paint C, and 5 parts by weight of red colored acrylic resin particles (average particle diameter: 6 μm) were mixed and stirred to obtain a gunmetal paint I. A marble-like pattern coating was performed using the same paint and process as in Example 1 except that Gunmetal Paint I was used.

The finish has a marble-like pattern, and the marble tone is silver, black, various gray colors and a marble tone including a red circular pattern with a diameter of several mm due to red resin particles. there were.

Embodiment 4

Synthesis of binder resin for paint (hereinafter referred to as binder resin J)

[0049] 200 parts of toluene and 200 parts of methyl isobutyl ketone were charged into a 1-liter four-necked flask equipped with a nitrogen inlet tube, a thermometer, a cooling tube, a dropping funnel, and a stirrer, and heated to 100 ° C. 200 parts of separately prepared methyl methacrylate, 100 parts of n-butyl methacrylate, 20 parts of n-butyl acrylate, 40 parts of 2-hydroxyethyl methacrylate, 40 parts of styrene, 12 parts of tert-butyl peroxy 2-ethylhexanoate Was added to the flask over 2 hours using a dropping funnel. After the addition was completed, 0.5 parts of tertiary butyl peroxy 2-ethylhexanoate was added every 30 minutes for 120 minutes in total, four times. In addition, 120
The temperature in the flask was maintained at 100 ° C. over a period of minutes, and then cooled to room temperature, and the reaction was completed to obtain a binder resin J.

Adjustment of paint curing resin (hereinafter referred to as curing agent K)

A curing agent K was obtained by mixing 50 parts of duranate 24A-100 (a burette-added type isocyanate compound of hexamethylene diisocyanate manufactured by Asahi Kasei Corporation) and 50 parts of toluene.

Adjustment of paint thinner (hereinafter referred to as thinner L)

Thinner L was obtained by mixing 20 parts of ethyl acetate, 30 parts of methyl isobutyl ketone, 30 parts of toluene, and 20 parts of Solvesso 150 (hydrocarbon-based mixed solvent).

Adjustment of yellow enamel paint (hereinafter referred to as yellow paint M)

50 parts by weight of binder resin J, RT-9
19 (yellow pigment manufactured by Ciba Geigy K.K.), 5 parts by weight of toluene, 30 parts by weight of toluene, and 15 parts by weight of ethyl acetate were mixed, placed in a plastic container, and 200 parts by weight having a diameter of 3 mm.
Was dispersed with a paint shaker for 5 hours together with zircon beads to obtain a yellow enamel paint M.

Preparation of clear paint (hereinafter referred to as clear paint N) 50 parts by weight of binder resin A, 30 parts by weight of toluene, and 20 parts by weight of ethyl acetate were mixed and stirred to obtain clear paint N.

Composition of paint (hereinafter referred to as “gold meta paint O”)

60 parts by weight of the clear paint N, FZ-
10 parts by weight of T60b (aluminum flake manufactured by Toyo Aluminum Co., Ltd.) and 30 parts by weight of a yellow paint M were mixed and stirred to obtain a gold meta paint O.

Preparation of mixed solution for developing marble-like pattern (hereinafter referred to as mixed solution P)

A mixed solution P was obtained by mixing and stirring 40 parts by weight of toluene, 30 parts by weight of anone, and 30 parts by weight of ethyl acetate.

Adjustment of two-pack paint

With respect to 1.0 equivalent of the hydroxyl group of the acrylic polyol used in the gold meta paint O,
The curing agent K diluted with 1.1 equivalents of the isocyanate prepolymer was added, and the thinner L was mixed and stirred until the viscosity at 20 ° C. measured by Ford cup # 4 was 11.5 seconds.

[0063] Painting process

The gold meta paint that has been adjusted is
Spray painting was performed on the ABS blackboard using a spray gun. After the completion of the coating, the mixed solution P was preliminarily dried in a box-type drying oven at 60 ° C. for 2 minutes, and immediately, the mixed solution P was sprayed on the coating film using a low-pressure spray gun. After the spray treatment of the mixed solution P was completed, setting was performed at room temperature for 5 minutes, and then drying was performed again in a box-type drying oven at 70 ° C. for 30 minutes to complete all the steps.

The finish had a marble-like pattern, and the overall color tone was a gold color and had a marble tone with a change in shades of gold.

[0066]

As described above, in the method of developing a marble pattern in the present invention, a paint using a plurality of pigment components having different properties is subjected to a normal coating treatment, and thereafter, one or more kinds of appropriate blending are performed. Spraying a mixed liquid consisting of the above solvents on the painted surface to cause a physical color separation phenomenon in a plurality of pigment components having different properties contained in the paint constituting the paint film, thereby producing one kind of paint. In this method, a marble-finished pattern coating film of a plurality of colors is formed, so that it is not necessary to wash a jig or to manage a plurality of paints, thereby enabling cost reduction.

Furthermore, since a marble-like patterned coating film can be formed with one kind of paint, compared to a case where a marble-like tone is conventionally obtained by using a plurality of colors, for example, a case where a plurality of objects are coated. Thus, there are advantages that the same pattern and color tone can be easily finished, and that there is little variation in the finished state due to the difference in the painter.

In addition, by taking into account the specific components of the coating composition of the present invention and the components of the mixed liquid used in the post-coating treatment, it is possible to obtain a marble-like pattern finish that has not been seen before. It is.

Claims (8)

[Claims] 1. A coating composition containing at least one of a metal powder and / or a resin particle in a pigment component is applied to an object to be coated, and then a liquid mixture comprising one or more solvents is applied to the object to be coated. Forming a marble-like coating film on the object by spraying on the object to cause a color separation phenomenon in the pigment component in the coating composition. . 2. The method according to claim 1, wherein the metal powder is one or both of aluminum powder and mica powder. 3. The method of forming a marble-like coating film according to claim 1, wherein one or both of the metal powder and the resin particles are colored. 4. The marble pattern paint according to claim 1, wherein the coating composition is colored with one or more kinds of coloring pigments other than the metal powder and the resin particles. Method of forming a film. 5. The resin according to claim 1, wherein the resin used in the coating composition is a lacquer resin, and the lacquer resin is applied to the object to be dried, and then dried. A method for forming a marble-like patterned coating film, which comprises spraying with a mixed liquid. 6. The two-component mixed coating composition according to claim 1, wherein the resin used is a polyol resin and a curing agent component is mixed before coating. A method of forming a marble-like coating film, wherein the coating material is applied to the object to be coated, dried, and then sprayed with the mixed liquid. 7. The liquid mixture according to claim 1, wherein the liquid mixture for spraying is a liquid mixture of at least one kind of organic solvent and water. A method for forming a marble-like patterned coating film, comprising a surfactant for homogenization. 8. An article on which a marble-like patterned coating film is formed by the coating film forming method according to any one of claims 1 to 7.