JP2005177642A - Method of forming multilayer coating film, and coated article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating film having an excellent bright appearance from a highlight part to a shade part for various industrial products such a car body outer plate. <P>SOLUTION: The invention relates to the method of forming a multilayer coating film which coats the coating film, obtained by coating a base coat coating (A) containing a scale-like luster color pigment on a substrate, with a luster clear coating (B) containing one or more scale-like luster color pigments selected from an interference mica pigment coated with titanium dioxide on the surface, a silica flaky pigment coated with metal oxide, a hologram pigment, a glass flaky pigment coated with metal oxide, and a glass flaky pigment plated with a metal. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

    The present invention relates to a method for forming a multilayer coating film and a coated article excellent in glitter feeling from highlight to shade.

    A method of forming a multilayer coating film by coating a colored paint, a metallic paint containing titanium oxide-coated mica powder, and a clear paint in order is already known. For example, in Patent Document 1, as a method of forming a multilayer coating film having excellent glitter in a highlight portion and high saturation in a shade portion, a colored paint, an aluminum oxide powder coated with a metal oxide, and a metal are disclosed. A method is described in which an interference paint and a clear paint containing mica powder coated with oxide are applied to form a multilayer coating. In this method, the highlight portion is excellent in glitter, and a highly saturated coating film is obtained in the shade portion, but the glitter feeling in the shade portion is insufficient.

    Further, in Patent Document 2, after forming a glittering base coating film containing a first glittering pigment on a base material, a first clear coating containing a second glittering pigment on the glittering base coating film. A method of forming a film, and further forming a second clear coating film on the first clear coating film, wherein the first glittering pigment or the second glittering pigment is a flaky shape comprising a cholesteric liquid crystal polymer. It describes a method for forming a glittering coating film, which is either a pigment or a different pigment of an interference mica pigment having a hue different from that in a highlight portion of a flake pigment made of the cholesteric liquid crystal polymer. However, in this method, a viewing angle is obtained by orienting flake pigments made of cholesteric liquid crystal polymer having dichroism and interference mica pigments having a hue different from the color development in the highlight portion of the flake pigments in different layers. However, it does not improve the glitter in the shade portion.

Japanese Patent Laid-Open No. 10-183033

JP 2003-245602 A

    An object of the present invention is to provide a method for forming a multilayer coating film and a coated article that are excellent in glitter from a highlight portion to a shade portion.

The present invention
1. An interference mica pigment whose surface is coated with titanium dioxide on a coating obtained by applying a base coat paint (A) comprising a scaly glittering pigment on a substrate, and a silica flake with a metal oxide. One or more scaly glittering pigments selected from pigments, hologram pigments, glass flake pigments coated with metal oxides, and glass flake pigments plated with metal are used in an amount of 0 with respect to 100 parts by weight of the vehicle solid content in the paint. A multilayer coating film forming method, characterized in that a multilayer coating film is obtained by coating a bright clear coating (B) comprising 0.01 to 20 parts by weight,
2. A base coat paint (A) containing a scaly glittering pigment is applied onto a paint film obtained by painting a color base paint (C) on a substrate, and the surface is further coated on the resulting paint film. One or more scaly glitters selected from interference mica pigment coated with titanium dioxide, silica flake pigment coated with metal oxide, hologram pigment, glass flake pigment coated with metal oxide, and glass flake pigment plated with metal A multi-layer coating comprising a bright clear coating (B) containing 0.01 to 20 parts by weight of a pigment based on 100 parts by weight of a vehicle solid content in the paint Film forming method,
3. The method for forming a multilayer coating film according to item 1 or 2, wherein the base coat paint (A) is applied in a plurality of stages,
4). 3. The multilayer coating film forming method according to 1 or 2, wherein the top clear coating material (D) is applied by one layer or two or more layers on the coating film obtained by applying the bright clear coating material (B).
5). The method for forming a multilayer coating film according to claim 4, wherein the top clear coating (D) contains a dye and / or a coloring pigment,
6). 6. Any one of 1-5 which apply | coats a clear coating material (E) further on the coating film by a basecoat coating material (A), and further applies a glittering clear coating material (B) on the obtained coating film. The multilayer coating film forming method according to the description,
7.1 A coated article obtained by the multilayer coating film forming method according to any one of items 1 to 6,
About.

    According to the present invention, a bright clear paint (B) further containing a specific scaly glitter pigment is applied on a coating film of a base coat paint (A) comprising a scaly glitter pigment on a substrate. By doing this, it is possible to obtain a coating film excellent in glitter feeling from the highlight portion to the shade portion.

    In the method of the present invention, the base material is a metal such as iron, zinc or aluminum, an alloy containing these, a molded product plated or vapor-deposited with these metals, and a molded product made of glass, plastic or foam. Etc. Depending on these materials, it can be appropriately degreased or surface treated to form a substrate. Furthermore, an undercoat film or an intermediate coat film can be formed on the substrate to form a substrate, and these are particularly preferable.

    The undercoat film is formed to conceal the surface of the material or impart anticorrosion and rustproofness to the material, and can be obtained by applying an undercoat paint, drying and curing. it can. The type of the undercoat paint is not particularly limited, and examples thereof include an electrodeposition paint and a solvent-type primer.

    The intermediate coating film is formed to conceal the surface of the material or the undercoating film, or to impart adhesion or chipping resistance. It can be obtained by applying a paint and drying and curing. The type of intermediate coating is not particularly limited, and known ones can be used. For example, an organic solvent-based or water-based intermediate coating containing a thermosetting resin composition and a color pigment as essential components can be preferably used. .

    In the case where an undercoat film or an intermediate coat film is formed as the substrate, the undercoat film or the intermediate coat film can be heated, and a coating material for the next step described later can be applied after crosslinking and curing. Or the coating material of the next process can also be applied in a state where the undercoat film and / or the intermediate coat film are uncured.

    In the present invention, a base coat paint (A) comprising a scaly glittering pigment is applied to the substrate as described above. The scaly glittering pigment may contain one or a combination of two or more conventionally known pigments for inks and paints. Specific examples of scaly glittering pigments include scaly metal pigments such as aluminum, copper, nickel alloys, and stainless steel, scaly metal pigments whose surfaces are coated with metal oxides, and scaly materials obtained by chemically adsorbing colored pigments on the surface. Metallic pigments, scaly aluminum pigments with an aluminum oxide layer formed by causing an oxidation-reduction reaction on the surface, aluminum solid-plated iron oxide pigments, glass flake pigments, glass flake pigments whose surfaces are coated with metal or metal oxides Glass flake pigment with colored pigment chemisorbed on the surface, interference mica pigment coated with titanium dioxide on the surface, reduced mica pigment with reduced interference mica pigment, colored pigment chemisorbed on the surface, or iron oxide on the surface Coated colored mica pigment, graphite pigment coated with titanium dioxide on the surface, silica coated with titanium dioxide on the surface Flakes, alumina flake pigments, plate-like iron oxide pigments, holographic pigments, synthetic mica pigments, cholesteric liquid crystal polymer pigments having a helical structure, and the like oxy bismuth pigments chloride. Of these, silica flake and alumina flake pigment coated with titanium dioxide on the surface, interference mica pigment coated with titanium dioxide on the surface, glass flake pigment coated with metal or metal oxide on the surface, and aluminum flake pigment are preferable. Interference mica pigments and aluminum flake pigments coated with titanium dioxide are particularly preferred, but are not limited, and the above-mentioned various glitter pigments may be used alone or in combination of two or more according to the glitter feeling desired. Can do.

    The blending amount of the scaly glitter pigment is 1 to 50 parts by weight, preferably 5 to 100 parts by weight of the vehicle solid content in the base coat paint (A) in terms of the glitter feeling and finished appearance of the resulting coating film. 30 parts by weight.

    In addition to the scale-like glitter pigment, the base coat paint (A) can contain a resin component as a vehicle. As the resin component, a thermosetting resin composition is preferable. Specifically, a base resin such as an acrylic resin, a polyester resin, an alkyd resin, or a urethane resin having a crosslinkable functional group such as a hydroxyl group is used as a melamine resin or urea. Examples thereof include those used in combination with a crosslinking agent such as a resin and a polyisocyanate compound (including a block body), and these are used by being dissolved or dispersed in a solvent such as an organic solvent and / or water.

    Moreover, a color pigment can be mix | blended with a basecoat coating material (A) as needed. As the color pigment, conventionally known pigments for ink and paint can be used alone or in combination of two or more. Specific examples of color pigments include metal oxide pigments such as titanium oxide and iron oxide, composite metal oxide pigments such as titanium yellow, carbon black, azo pigments, quinacridone pigments, diketopyrrolopyrrole pigments, and perylene pigments. Perinone pigments, benzimidazolone pigments, isoindoline pigments, isoindolinone pigments, metal chelate azo pigments, phthalocyanine pigments, indanthrone pigments, dioxane pigments, indigo pigments, and the like. .

    The content of these color pigments is preferably 150 parts by weight or less, more preferably 3 to 100 parts by weight with respect to 100 parts by weight of the vehicle solid content in the base coat paint (A).

    Further, for the base coat paint (A), if necessary, a solvent such as water or an organic solvent, a rheology control agent, a pigment dispersant, an anti-settling agent, a curing catalyst, an antifoaming agent, an antioxidant, an ultraviolet absorber, etc. These various additives, extender pigments and the like can be appropriately blended.

    The base coat paint (A) can be prepared by mixing and dispersing the aforementioned components. Usually, at the time of coating, the solid content is 15 to 50% by weight, preferably 20 to 40% by weight, based on the coating composition, and the viscosity at 20 ° C. is 11 to 15 seconds / ford cup # 4. It is preferable to make adjustments.

    The base coat paint (A) can be applied by a method such as electrostatic coating, air spray, airless spray, and the film thickness is within a range of 5 to 25 μm based on the cured coating film. It is preferable from the point of the smoothness of a coating film. The coating film of the base coat paint (A) itself can be crosslinked and cured at a temperature of about 70 to about 150 ° C.

    In the present invention, the base coat paint (A) can be applied by a plurality of stages. Painting in multiple coating stages is a method of coating in multiple stages (stages) by taking setting time between the painting stages instead of obtaining a coating film with a constant film thickness by a single coating. This is a technique for improving the orientation of the scaly glittering pigment in the coating film by reducing the film thickness obtained by coating the stage. In the method of the present invention, the number of stages is preferably 3 times or more and particularly preferably 4 times from the viewpoint of glitter. The dry film thickness obtained by one-stage coating is preferably 0.4 to 6 μm, particularly preferably 1 to 4 μm. The dry film thickness obtained for each stage of coating may be the same for each stage, but may be different for each stage. Moreover, as each setting time, 1 to 10 minutes are preferable and 1 to 5 minutes are especially preferable.

    In addition, the base coat paint (A) can be heated after coating, and the paint of the next process can be applied after crosslinking and curing, or the paint of the next process can be applied in an uncrosslinked cured state without being cured by heating. be able to.

    In the method of the present invention, the bright clear paint (B) is further applied onto the coating film obtained by applying the base coat paint (A). The bright clear paint (B) comprises an interference mica pigment whose surface is coated with titanium dioxide, a silica flake pigment coated with a metal oxide, a hologram pigment, a glass flake pigment coated with a metal oxide, and a glass flake pigment plated with metal. A scaly glittering pigment comprising at least one scaly glittering pigment selected from the above is an essential component, and a resin component and a solvent such as water or an organic solvent as main components, and for other paints as necessary. It is a liquid paint formed by blending additives and the like, and forms a coating film having colorless or colored transparent and excellent glitter feeling due to scaly glittering pigments.

    In the present invention, the coating with the bright clear coating (B) is a spectrophotometer "MPS-" which is a coating obtained by peeling off a dry-cured coating after coating on a smooth PTFE plate so as to have a cured coating thickness of 25 μm. The light transmittance in the visible light region (wavelength 400 nm to 700 nm) measured by “2450” (trade name: manufactured by Shimadzu Corporation) is 40% or more, preferably 50% or more. The light transmittance in the visible light region is a ratio of transmitting visible light rays, and means that the larger the numerical value, the higher the transparency.

    The bright clear paint (B) comprises an interference mica pigment whose surface is coated with titanium dioxide, a silica flake pigment coated with a metal oxide, a hologram pigment, a glass flake pigment coated with a metal oxide, and a glass flake pigment plated with metal. It comprises one or more scaly glittering pigments selected from: The scaly glitter pigment is not limited, and can be used from among the scaly glitter pigments depending on the desired glitter feeling, among these glass flake pigments coated with a metal oxide, Metal-plated glass flake pigments are particularly preferred, but the scaly glitter contained in the base coat paint (A) in order to give an excellent glitter feeling from the highlight part to the shade part when a multilayer coating film is formed. It is preferable to blend a scaly glittering pigment having a different glitter feeling with the pigment. Specific examples of the scaly glittering pigment include a color stream series (trade name: manufactured by Merck), a diamond hologram series (trade name: manufactured by Dia Industrial Co., Ltd.), and a metashine series (trade name: manufactured by Nippon Sheet Glass Co., Ltd.). MC1020RS, MC2015PS, etc.).

    A preferable blending amount of the scaly bright pigment is 0.1 to 20 parts by weight with respect to 100 parts by weight of the vehicle solid content in the bright clear paint (B). If it is less than 0.1 part by weight, the glitter in the shade part is insufficient, and if it exceeds 20 parts by weight, the appearance of the coating film may be deteriorated. More preferably, it is 0.5 to 10 parts by weight.

    The bright clear paint (B) can be appropriately blended with a color pigment or dye within a range not impairing transparency. As the color pigment and dye, conventionally known pigments for ink and paint can be used singly or in combination of two or more. The amount added may be determined as appropriate, but it is suitably 30 parts by weight or less, preferably 0.1 to 10 parts by weight per 100 parts by weight of the vehicle solid content in the clear coating film.

    The bright clear paint (B) can contain a resin component as a vehicle in addition to the scaly bright pigment. As the resin component, the same resin as that which can be used in the base coat paint (A) can be used.

    Further, the bright clear paint (B) may be added with various solvents such as water or organic solvents, pigment dispersants, anti-settling agents, curing catalysts, antifoaming agents, antioxidants, UV absorbers, etc., as necessary. An agent, extender, etc. can be appropriately blended.

    The bright clear paint (B) can be prepared by mixing and dispersing the aforementioned components. Usually, at the time of coating, the solid content is 30 to 60% by weight, preferably 35 to 50% by weight, based on the coating composition, and the viscosity at 20 ° C. is 20 to 25 seconds / Ford cup # 4. It is preferable to make adjustments.

    The bright clear paint (B) can be applied by a method such as electrostatic coating, air spray, airless spray, etc., and its film thickness is a cured coating film from the viewpoint of smoothness and glitter of the coating film. Is preferably in the range of 5 to 40 μm. The coating of the bright clear coating (B) itself can be crosslinked and cured at a temperature of about 70 to about 150 ° C.

    In the method of the present invention, the color base paint (C) containing a color pigment can be applied onto the substrate before the base coat paint (A) is applied, if necessary. The color base paint (C) is a liquid paint composed mainly of a color pigment, a resin component and a solvent such as water or an organic solvent, and further containing other paint additives as required. The color of the film is concealed and the hue of the multilayer coating film is determined. By determining the hue of the multilayer coating film with the color base paint (C), the amount of the color pigment blended in the base coat paint (A) can be reduced, so that the glitter of the paint film can be further enhanced. The coloring pigment may contain one or a combination of two or more conventionally known pigments for inks and paints. As specific examples of the color pigment, those that can be used in the base coat paint (A) can be used in the same manner.

    A preferable blending amount of the color pigment is 1 to 150 parts by weight, preferably 3 to 100 parts by weight with respect to 100 parts by weight of the vehicle solid content in the color base paint (C) from the viewpoint of concealability and coating film appearance. is there.

    The color base paint (C) can contain a resin component as a vehicle in addition to the color pigment. As the resin component, the same resin as that which can be used in the base coat paint (A) can be used.

    For the color base paint (C), various solvents such as water or organic solvents, rheology control agents, pigment dispersants, antisettling agents, curing catalysts, antifoaming agents, antioxidants, UV absorbers, etc. Additives, extender pigments and the like can be appropriately blended.

    The color base paint (C) is prepared by mixing and dispersing the aforementioned components. Usually, at the time of coating, the solid content is 30 to 60% by weight, preferably 35 to 50% by weight, based on the coating composition, and the viscosity at 20 ° C. is 18 to 25 seconds / forward cup #. It is preferable to adjust to 4.

    The color base paint (C) of the present invention can be applied by a method such as electrostatic coating, air spray, airless spray, etc., and its film thickness is a cured coating from the viewpoint of coating concealment and smoothness. It is preferable to be within the range of 10 to 45 μm based on the membrane. The color base paint (C) coating itself can be crosslinked and cured at a temperature of about 70 to about 150 ° C.

    Further, the color base paint (C) can be heated after coating, and the base coat paint (A) can be applied after crosslinking and curing, or the base coat paint (A) can be applied in an uncrosslinked cured state without being cured by heating. It can also be painted.

    In the method of the present invention, a clear coating can be formed by further coating one or more layers of the top clear coating (D) on the coating obtained by applying the bright clear coating (B).

    The top clear paint (D) is a liquid or powder form that forms a colorless or colored transparent coating film comprising a resin component and a solvent as main components and further blending other paint additives as required. The paint can be applied to an uncured or cured coating surface of the bright clear paint (B).

    As the top clear paint (D), a conventionally known clear paint can be used without limitation. For example, a liquid or powdery coating composition containing a base resin and a crosslinking agent can be applied. Examples of the base resin include acrylic resin, polyester resin, alkyd resin, fluororesin, urethane resin, and silicon-containing resin containing a crosslinkable functional group such as a hydroxyl group, a carboxyl group, a silanol group, and an epoxy group. It is done. As a crosslinking agent, a melamine resin capable of reacting with the functional group of the base resin, urea resin, polyisocyanate compound, block polyisocyanate compound, epoxy compound or resin, carboxyl group-containing compound or resin, acid anhydride, Examples thereof include alkoxysilane group-containing compounds or resins. Moreover, additives, such as solvents, such as water and an organic solvent, a curing catalyst, an antifoamer, and a ultraviolet absorber, can be suitably mix | blended as needed.

    The top clear paint (D) can be blended with a color pigment or dye in a timely manner within a range not impairing transparency. As color pigments and dyes, conventionally known pigments for inks and paints can be used alone or in combination of two or more. The amount of addition may be appropriately determined, but is 30 parts by weight or less, preferably 0.1 to 15 parts by weight with respect to 100 parts by weight of the vehicle solid content in the clear coating film.

    In the method of the present invention, if necessary, the clear paint (E) is applied on the coating film obtained by applying the base coat paint (A), the bright clear paint (B) is applied thereon, and again, A top clear paint (D) can be applied.

    The clear paint (E) is a colorless or colored transparent coating film comprising a resin component and a solvent as main components and, if necessary, other paint additives as well as the top clear paint (D). It can be applied to the coating surface of the base coat paint (A) uncured or cured.

    As the clear paint (E), a conventionally known clear paint can be used without limitation. For example, the same coating composition as the top clear coating (D) can be applied.

    Further, the clear paint (E) can be applied by a method such as electrostatic coating, air spray, airless spray, and the film thickness is based on the cured coating film from the viewpoint of the smoothness of the coating film. It is preferable to be in the range of 25 to 40 μm. The clear coating (E) coating itself can be crosslinked and cured at a temperature of about 70 to about 150 ° C.

Next, an Example is given and this invention is demonstrated more concretely.
Examples 1-7 and Comparative Examples 1-3
Preparation of base material Degreased and zinc phosphate-treated steel plate (JISG3141, size 400 × 300 × 0.8 mm), cationic electrodeposition paint “Electron 9400HB” (trade name: manufactured by Kansai Paint Co., Ltd., epoxy resin polyamine cationic resin (Using a block polyisocyanate compound as a curing agent) is electrodeposited so as to have a film thickness of 20 μm based on the cured coating film, heated at 170 ° C. for 20 minutes to be crosslinked and cured, and then electrodeposited A membrane was obtained.

On the obtained electrodeposition coating surface, an intermediate coating “Lugabek intermediate coating gray” (trade name: manufactured by Kansai Paint Co., Ltd., polyester resin / melamine resin type, organic solvent type) is applied by air spray. Based on the film, it was coated to a film thickness of 30 μm, heated at 140 ° C. for 30 minutes to be crosslinked and cured, and a coated plate on which an intermediate coating film was formed was used as a substrate.
Preparation of coating material Lubricant and, if necessary, coloring pigments are blended in proportions shown in Table 1 per 100 parts by weight (solid content) of a hydroxyl group-containing acrylic resin (hydroxyl value 100, number average molecular weight 20000) and melamine resin. Then, the mixture was stirred and mixed, diluted to an appropriate viscosity for coating, an organic solvent-type paint having a solid content of about 25% was prepared, and a color base paint and a base coat paint used in each Example and Comparative Example were prepared.

Preparation of test plate In the following procedure, a color base paint, a base coat paint, and a bright clear paint were applied so as to have the constitution shown in Table 1, and a top clear paint was applied to obtain a test plate.
(Color base paint application)
For Examples 1, 2, and 7 and Comparative Examples 1 and 2, the color base paint prepared in (2) was applied to the intermediate coating plate prepared in (1) using a mini-bell type rotary electrostatic coating machine. The coating was performed under the conditions of a temperature of 20 ° C. and a humidity of 75%. After coating, the mixture was allowed to stand at room temperature for 15 minutes, and then heated in a hot-air circulating drying furnace at 140 ° C. for 30 minutes to obtain a cured coating film having a thickness of 30 μm.
(Base coat paint application)
For Examples 1, 2, and 7 and Comparative Examples 1 and 2, on the color base coating film, for Examples 3 to 6 and Comparative Example 3, the intermediate coating plate prepared in (1) was prepared in (2). The resulting base coat paint was applied using a REA gun under conditions of a boot temperature of 20 ° C. and a humidity of 75% so as to be 7 to 15 μm as a cured coating film.
(Coating with bright clear paint)
For Examples 1 to 4, after the base coat paint was applied, it was allowed to stand at room temperature for 15 minutes, and then the bright clear paint prepared in (2) was applied to this uncured coating surface using a REA gun with a boot temperature of 20 It coated so that it might become 10-15 micrometers as a cured coating film on conditions of 75 degreeC and 75 degreeC humidity.
(Coating of top clear paint)
Although not specifically shown in Table 1, for Examples 1 to 7, after applying the bright clear paint, and for Comparative Examples 1 to 3, after applying the base coat paint, it was allowed to stand at room temperature for 15 minutes. Using a mini-bell type rotary electrostatic coating machine, apply a clear paint (Lugabe Kukuriya, manufactured by Kansai Paint, trade name, acrylic resin / amino resin type, organic solvent type) to the uncured coating surface. The cured coating film was coated at 25 to 35 μm under the conditions of 20 ° C. and 75% humidity. After coating, the sample was allowed to stand at room temperature for 15 minutes, and then heated in a hot air circulating drying oven at 140 ° C. for 30 minutes to simultaneously dry and cure the multilayer coating film to obtain a test plate.
Example 8
After applying the base coat paint in the same manner as in Example 3 and leaving it to stand at room temperature for 15 minutes, this uncured coated surface was subjected to a clear paint (Lugabe Clear, manufactured by Kansai Paint, trade name, acrylic resin / amino resin system , Organic solvent type) using a mini-bell type rotary electrostatic coater, and coated as a cured coating film at 25 to 35 μm under conditions of a boot temperature of 20 ° C. and a humidity of 75%. After leaving it at room temperature for 15 minutes, it was heated at 140 ° C. for 30 minutes using a hot-air circulating drying oven to dry and cure the base coat paint and clear paint simultaneously.

    Further, the bright clear paint used in Example 3 was coated with a REA gun under conditions of a boot temperature of 20 ° C. and a humidity of 75% so that the cured coating film had a thickness of 10 to 15 μm.

Furthermore, after leaving at room temperature for 15 minutes, a top clear paint (Lugabe Kuclear, manufactured by Kansai Paint, trade name, acrylic resin / amino resin type, organic solvent type, clear paint) is applied to the uncured coating surface. Was coated as a cured coating film at 25 to 35 μm under the conditions of a boot temperature of 20 ° C. and a humidity of 75% using a mini-bell type rotary electrostatic coating machine. After leaving it at room temperature for 15 minutes, it was heated at 140 ° C. for 30 minutes using a hot-air circulating drying oven to simultaneously dry and cure the multilayer coating film to obtain a test plate.
(Evaluation test)
About the test board obtained in Examples 1-8 and Comparative Examples 1-3, the brightness in a highlight part and a shade part was evaluated visually. Table 2 shows the results.

The coating film forming method of the present invention can be applied to various industrial products, particularly to the outer plate of an automobile body.

Claims (7)

An interference mica pigment whose surface is coated with titanium dioxide on a coating obtained by applying a base coat paint (A) comprising a scaly glittering pigment on a substrate, and a silica flake with a metal oxide. One or more scaly glittering pigments selected from pigments, hologram pigments, glass flake pigments coated with metal oxides, and glass flake pigments plated with metals are used in an amount of 0 with respect to 100 parts by weight of the vehicle solid content in the paint. A method for forming a multilayer coating film, comprising: applying a bright clear coating (B) comprising 0.01 to 20 parts by weight to obtain a multilayer coating film. A base coat paint (A) containing a scaly glittering pigment is applied onto a paint film obtained by painting a color base paint (C) on a substrate, and the surface is further coated on the resulting paint film. One or more scaly glitters selected from interference mica pigment coated with titanium dioxide, silica flake pigment coated with metal oxide, hologram pigment, glass flake pigment coated with metal oxide, and glass flake pigment plated with metal A multi-layer coating comprising a bright clear coating (B) containing 0.01 to 20 parts by weight of a pigment based on 100 parts by weight of a vehicle solid content in the paint Film forming method. The method for forming a multilayer coating film according to claim 1 or 2, wherein the base coat paint (A) is applied in a plurality of stages. The method for forming a multilayer coating film according to claim 1 or 2, wherein one or more layers of the top clear coating (D) are applied onto the coating obtained by applying the bright clear coating (B). The method for forming a multilayer coating film according to claim 4, wherein the top clear coating (D) contains a dye and / or a coloring pigment. 6. The clear coating composition (E) is further applied on the coating film of the base coat coating composition (A), and the bright clear coating composition (B) is further applied on the obtained coating film. The multilayer coating film forming method as described. The coated article obtained by the multilayer coating-film formation method of any one of Claims 1-6.