JP3547066B2 - Method for forming marble-like patterned coating film and article formed with the coating film - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating composition which imparts a marble-like pattern by applying a coating composition comprising a specific component on an object to be coated and then spraying a coating surface with a specific mixed liquid, and a coating method therefor.
[0002]
[Prior art]
In many cases, paints have the purpose of providing aesthetics at the same time as protecting objects to be coated, and the provision of distinctive patterns is one of the important themes, especially for painting home appliances, sundries, and stationery. It is. The term "pattern coating" as used herein means, 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. It is a pear-skinned finish paint obtained by applying an appropriate spray coating using a gun.
[0003]
One of the painting techniques included in the category of such pattern-like painting is marble-like finish painting. In general, marble-like painting is a pattern-like painting that gives a marble-like pattern to the object to be painted.After applying a colored paint on the object to be painted, another color paint is applied using a low-pressure spray gun etc. This is a coating method in which a marble-like coating film is formed by spray coating.
[0004]
[Problems to be solved by the invention]
However, in such a conventional technique, when a marble pattern paint finish is performed, a paint having a different color is sprayed again and applied again several times after a uniform paint is applied to an object to be coated. There is a problem that it takes time to clean the utensils, and 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.
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems in the conventional marble-like finish coating and to form a marble-like patterned coating film that cannot be obtained by the conventional marble-tone finish method. It is in the place where.
[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 paint having a specific composition using a plurality of pigment components having different properties is applied to an object to be coated, and thereafter at least. By subjecting the painted surface to spray treatment with a liquid comprising one or more mixed solutions, a physical color separation phenomenon occurs in a plurality of pigment components having different properties contained in the paint constituting the coating film, As a result, it is 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
According to the embodiment of the present invention, a paint obtained by adding one or more of one or both of metal powder and resin particles to a binder resin component constituting the paint is applied by a coating method such as spray coating or brush coating. After that, by spraying the painted surface with a liquid composed of one or more kinds of mixed solutions, a physical color separation phenomenon occurs in a plurality of pigment components having different properties contained in the paint constituting the paint film. To produce a coating film having a marble finish pattern in a plurality of colors.
[0008]
Among the specific components of the coating composition used in the present invention, examples of the metal powder include aluminum powder, stainless powder, nickel powder, copper powder, and mica powder. Examples of the shape of the metal powder include a flake shape, a spherical shape, an irregular shape, and a needle shape, but a flake-like metal powder is preferable. As the metal powder, those coated with a resin for the purpose of improving the durability and those whose surface is colored may 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% 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.
[0009]
Examples of the resin particles as the specific component used in the present invention include acrylic resin particles, urethane resin particles, silicone resin particles, and nylon resin particles. 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.
[0010]
The average particle size of the resin particles is preferably 0.1 μm to 100 μm, more preferably 0.5 μm to 15 μm. If the thickness is 100 μm or more, the finished surface of the coating is rough, which is not preferable. On the other hand, when the thickness is 0.1 μm or less, it is not preferable 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 may be used in combination. This depends on the finished state and the pattern, and requires a prescription according to the color tone.
[0011]
Although it is possible to use transparent resin particles depending on the finished color tone, it is preferable to use colored resin particles. This is because the pattern formed after the physical color separation after painting is made 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 as the content in the paint film. More preferably, it is 0% to 30% by weight. If the content is more than 50% by weight, it is not preferable because defects such as cracks occur in the formed coating film.
[0012]
In the specific coating composition used in the present invention, one or both of the metal powder and the resin particles are used as an essential component, but a binder resin colored with a coloring pigment according to a finished color tone is used. Is preferred. The reason for this is that the pattern after the physical color separation after painting becomes clear and sharp finish is possible.
[0013]
As the binder resin used in the coating composition of the present invention, it is possible to exemplify all resins generally used for coating according to the suitability of the object to be coated. However, in consideration of the field in which marble-like paints are used, a two-component binder in which a curing agent such as polyisocyanate is added to a one-component binder or a polyol-type binder immediately before coating is preferable.
[0014]
The coating composition of the present invention may contain a matting agent, a viscosity adjusting agent, a leveling agent, an antifoaming agent, a solvent, an ultraviolet absorber, a light stabilizer, a reaction catalyst, and the like, if necessary.
[0015]
The present invention, after applying the coating composition, by applying a treatment such as spraying a mixed solution comprising one or more solvents, it is possible to finish the marble-like pattern coating film, this mixed solution Examples of the components that can be used include hydrocarbon organic solvents, ketone organic solvents, alcohol organic solvents, ester organic solvents, and water. These solvents are used as a mixture of one or more kinds, but a combination of components that cause separation of liquids to be used according to a 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.
[0016]
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.
[0017]
In the marble-like pattern finish coating method according to the present invention, when a one-pack type binder resin is used for the coating composition, the process of forming the marble-like pattern can be performed immediately after completion of the coating. Forming a marble-like pattern after application is preferable in terms of pattern reproduction.
[0018]
On the other hand, when a coating composition using a reactive binder resin is used, a difference may appear in a formed pattern depending on a standing time after coating or pre-drying conditions, so that the coating composition may be mildly applied after coating. It is preferable to carry out preliminary drying under suitable conditions and to form a marble-like pattern within a relatively short time after preliminary drying.
After the formation of the marble pattern, drying can be performed according to the used resin, solvent and the like.
[0020]
【Example】
Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited thereto.
[0021]
Example 1 Synthesis of binder resin for paint (hereinafter referred to as binder resin A)
[0022]
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 stirrer, and heated to 90 ° C. Separately prepared 150 parts of methyl methacrylate, 117.5 parts of n-butyl methacrylate, 100 parts of tert-butyl methacrylate, 5 parts of 2-hydroxyethyl methacrylate, 25 parts of styrene, 2.5 parts of methacrylic acid, tertiary butyl par A mixture consisting of 2 parts of oxy-2-ethylhexanoate was added to the flask using a dropping funnel over 2 hours. After completion of the addition, 0.5 parts of tert-butyl peroxy-2-ethylhexanoate was added every 30 minutes for 120 minutes in total, four times. Further, the temperature inside the flask was kept at 90 ° C. for 120 minutes, and then the temperature was raised to 110 ° C. and kept for 100 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.
[0023]
Adjustment of thinner for dilution (hereinafter referred to as thinner B)
[0024]
Thinner B was obtained by mixing 20 parts of ethyl acetate, 30 parts of isobutanol, 30 parts of toluene, and 20 parts of diacetone alcohol.
[0025]
Adjustment of black enamel paint (hereinafter referred to as black paint C)
[0026]
50 parts by weight of the binder resin A, 2 parts by weight of FW-200 (carbon black manufactured by Degussa Co., Ltd.), 30 parts by weight of toluene, and 18 parts by weight of ethyl acetate are mixed, placed in a plastic container, and 200 parts by weight of an iron bead having a diameter of 3 mm. At the same time, the mixture was dispersed with a paint shaker for 5 hours to obtain a black enamel paint C.
[0027]
Adjustment of white enamel paint (hereinafter referred to as white paint D)
[0028]
50 parts by weight of the binder resin A, 20 parts by weight of R-960 (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. Thus, a white enamel paint D was obtained.
[0029]
Adjustment of clear paint (hereinafter referred to as clear paint E)
[0030]
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 paint E.
[0031]
Composition of paint (hereinafter referred to as Gunmetal paint F)
[0032]
60 parts by weight of the clear paint E, 5 parts by weight of FZ-T60b (aluminum flake manufactured by Toyo Aluminum Co., Ltd.), 34.5 parts by weight of a black paint C, and 0.5 parts by weight of a white paint D were mixed and stirred to obtain a gunmetal paint F. .
[0033]
Preparation of mixed solution for marble-like appearance (hereinafter referred to as mixed solution G)
[0034]
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, preliminary drying was performed for 3 minutes in a box-type drying oven at 60 ° C., and immediately thereafter, the mixed solution G 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, thereby completing all the steps.
[0037]
The finished state had a marble-like pattern, and the marble tone was composed of silver, black, and various gray colors.
[0038]
Example 2
[0039]
Preparation of mixed solution for developing marble pattern (hereinafter referred to as mixed solution H)
[0040]
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.
[0041]
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.
[0042]
A finished film having a marble finish different from that in Example 1 was obtained. The marble tones consisted of silver, black and various gray colours.
[0043]
Example 3
[0044]
Composition of paint (hereinafter referred to as Gunmetal paint I)
[0045]
A mixture of 65 parts by weight of the paint E, 5 parts by weight of FZ-T60b (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) was mixed and stirred. I was obtained. A marble-like pattern coating was performed using the same paint and process as in Example 1 except that Gunmetal Paint I was used.
[0046]
The finish had a marble tone pattern, and the marble tone was a marble tone including silver, black, various gray colors, and a red circular pattern having a contour of several mm in diameter caused by red resin particles.
[0047]
Example 4
[0048]
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. Separately prepared 200 parts of 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 tert-butyl peroxy 2-ethylhexanoate was added every 30 minutes for 120 minutes, for a total of 4 times. Further, the temperature in the flask was maintained at 100 ° C. for 120 minutes, and then cooled to room temperature, and the reaction was completed to obtain a binder resin J.
[0050]
Adjustment of paint curing resin (hereinafter referred to as curing agent K)
[0051]
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 were mixed to obtain a curing agent K.
[0052]
Adjustment of paint thinner (hereinafter referred to as thinner L)
[0053]
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).
[0054]
Adjustment of yellow enamel paint (hereinafter referred to as yellow paint M)
[0055]
50 parts by weight of the binder resin J, 5 parts by weight of RT-919 (yellow pigment manufactured by Ciba-Geigy Co., Ltd.), 30 parts by weight of toluene, and 15 parts by weight of ethyl acetate are mixed, put 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.
[0056]
Adjustment of clear paint (hereinafter referred to as clear paint N)
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 paint N.
[0057]
Composition of paint (hereinafter referred to as Gold Meta Paint O)
[0058]
60 parts by weight of the clear paint N, 10 parts by weight of FZ-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.
[0059]
Preparation of mixed solution for marble pattern development (hereinafter referred to as mixed solution P)
[0060]
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.
[0061]
Adjustment of two-pack paint
The curing agent K diluted with 1.1 equivalents of the isocyanate prepolymer was added to 1.0 equivalent of the hydroxyl group of the acrylic polyol used in the gold meta paint O, and the measurement was further performed using a Ford cup # 4. The thinner L was mixed and stirred until the viscosity at 20 ° C. became 11.5 seconds.
[0063]
Painting process
The adjusted gold meta paint was spray-coated on an ABS blackboard using a spray gun. After completion of the coating, preliminary drying was performed for 2 minutes in a box-type drying oven at 60 ° C., and immediately thereafter, the mixed solution P was spray-treated 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.
[0065]
The finish had a marble-like pattern, and the overall color tone was gold-colored, with a marble tone varying in shades of gold.
[0066]
【The invention's effect】
As described above, the method of developing a marble-like pattern in the present invention is that a coating using a plurality of pigment components having different properties is subjected to a normal coating treatment, and then mixed with one or more solvents having an appropriate blend. By spraying a liquid on a painted surface, a physical color separation phenomenon occurs in a plurality of pigment components having different properties contained in the paint constituting the coating film, so that one kind of paint has a plurality of color tones. The method of forming a marble-finished pattern coating film eliminates the need for cleaning jigs and managing a plurality of paints, thereby enabling cost reduction.
[0067]
In addition, since a marble-like pattern coating film can be formed with one type of paint, the same pattern can be applied to a plurality of objects to be painted as compared to a case where a marble-like tone is conventionally obtained using a plurality of colors. There are also advantages such as easy finish of color and color tone, and little variation in the finished state due to the difference of the painter.
[0068]
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 never been seen before.

Claims (2)

In a coating composition containing a metal powder containing one or both of aluminum powder and mica powder in a pigment component, and at least one type of resin particles,
The resin used in the coating composition is a one-part dry type binder resin or a two-part reaction type binder resin,
After the coating composition is applied to an object to be coated, a mixed liquid containing at least one organic solvent and water is sprayed on the object to be coated to cause a color separation phenomenon in a pigment component in the coating composition. By One A method for forming a marble pattern paint film, comprising forming a marble pattern paint film of a plurality of colors with different kinds of paints. In an article on which a marble pattern coating film is formed by a coating method for forming a marble pattern by pattern coating,
After applying a coating composition containing a metal powder containing at least one of aluminum powder and mica powder to a pigment component, and at least one type of resin particles, at least one type of organic solvent and water are applied. Spraying the mixed liquid containing the composition onto the object to be coated, and causing a color separation phenomenon in the pigment component in the coating composition, thereby forming a coating film having a plurality of tones of a marble pattern with one type of coating. An article having a marble-like patterned coating formed by a forming method .