JP2002282779A - Method of forming light accumulative multicolor interference film and multicolor light accumulative coated material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of a light accumulative multicolor interference film, by which a plural tone film such as a two tone film having the multicolor (a plurality of colores) such as the two-tone or a pattern visible by the film formed as a light accumulative coat layer even when light does not shine for a long time at night or in a dark condition is formed and a interference film having color flop effect that hue is changed corresponding to a view angle of the coating film in the day time is formed. SOLUTION: In the method of forming the light accumulative coating layer containing a vehicle and a light accumulative pigment on a base material to be coated, the light accumulative coating layer is formed to have partially a different color right accumulative coating layer and after that, an interference clear coating layer containing the interference pigment is formed on the light accumulative coating layer and further a top clear coating layer is formed thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a luminous multicolor interference coating film and a multicolor luminous coating obtained by the method.

[0002]

2. Description of the Related Art It is known to form a fluorescent coating film or a phosphorescent coating film in order to improve the night visibility of a substrate to be coated.

For example, Japanese Patent Application Laid-Open No. H11-78402 describes an automobile wheel exterior part in which a coating containing a luminous pigment is partially formed. However, in the above publication, symbols are expressed in a portion where a luminescent paint is formed and a portion where a luminescent paint is not formed. For this reason, at night, the pattern along the site where the luminescent paint is formed is visually recognized. However, there is a problem that the color cannot be clearly recognized in a portion where the luminescent paint is not formed, and the color flop effect cannot be obtained in the daytime.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-color (multi-color) image, such as a two-tone image or a pattern, formed by a coating film formed as a luminous coating layer even at night or in a dark condition without light for a long time without exposure to light. A multicolor interference coating film that forms a multi-tone coating film such as a two-tone coating film with visible color, and forms an interference coating film with a color flop effect in which the hue changes depending on the angle at which the coating film is viewed in the daytime. It is an object of the present invention to provide a forming method and a multicolor phosphorescent coating obtained by the method.

[0005]

Means for Solving the Problems The present inventors have conducted intensive studies in view of the above-mentioned problems, and as a result, have reached the present invention. 1. A method of forming a luminous coat layer containing a vehicle and a luminous pigment on a substrate to be coated, wherein after forming the luminous coat layer partially as a luminous coat layer of a different color, an interference pigment is formed on the luminous coat layer. A method of forming a luminous multicolor interference coating film, wherein an interference clear coat layer is formed and a top clear coat layer is further formed thereon. 2. The above-described method for forming a luminous multicolor interference coating film, wherein the luminous coat layer further contains a brilliant pigment and / or a color pigment. 3. The method for forming the luminous multicolor interference coating film, wherein the interference clear coat layer contains a color pigment. 4. The method for forming a luminous multicolor interference coating film, wherein a light-colored base coat layer is formed below the luminous coating layer. 5. The method for forming the luminous multicolor interference coating film, wherein the luminous coating layer is a two-tone coating film or a pattern coating film. 6. The method for forming the luminous multicolor interference coating film, wherein the substrate to be coated is an automobile body. 7. A multicolor luminous coating obtained by the method for forming a luminous multicolor interference coating film.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail.

A method for forming a phosphorescent multicolor interference coating film The method for forming a phosphorescent multicolor interference coating film of the present invention is a method for forming a phosphorescent coating layer containing a vehicle and a phosphorescent pigment on a substrate to be coated. After forming the phosphorescent coating layer as a partially different color phosphorescent coating layer, formed as an interference clear coat layer containing an interference pigment on this phosphorescent coating layer,
Further, a top clear coat layer is formed thereon. Preferably, a light-colored base coat layer is formed before forming the phosphorescent coat layer.

Substrates for Coating The above-mentioned substrates to be coated include metals such as iron, aluminum, copper and alloys thereof; inorganic materials such as glass, cement and concrete; polyethylene resins, polypropylene resins and ethylene-vinyl acetate. Resins such as polymer resin, polyamide resin, acrylic resin, vinylidene chloride resin, polycarbonate resin, polyurethane resin and epoxy resin, and various plastic materials such as FRP; natural or synthetic materials such as wood and fiber materials (paper, cloth, etc.) Materials and their processed products are listed. As the substrate to be coated, either an opaque substrate to be coated or a transparent substrate to be coated can be used.
A light-colored base coat layer is preferably formed on the substrate to be coated directly or via an undercoating film, and a light-storing coat layer containing a vehicle and a light-storing pigment and an interference clear coat layer are formed. By making the base coat layer a pale color, it is possible to effectively develop color by light storage,
preferable.

In the case where the painted multicolor luminous paint is a car body or a part, the base material to be coated is preliminarily degreased, formed by a chemical conversion treatment, electrodeposition coating or various primer coatings. It is preferable to apply As the base material to be coated, a luminous multicolor interference coating film is formed, and polychromism is effectively exhibited, from the viewpoint of the design property and the safety against night vision by the luminous multicolor interference coating film, Automotive bodies are preferred.

Forming the luminous coating layer The polychromaticity in the method for forming the luminous multicolor interference coating film of the present invention means that a part of the luminous coating film is formed by a luminous coating film which emits light of a different color and is used at night or in a dark place. This means that the phosphorescent color has the effect of being visually recognized as multicolor. Specifically, it is a two-tone paint film with a phosphorescent paint film, or a pattern or pattern with a phosphorescent paint film on a part of the phosphorescent paint film. Is also referred to as “design”). Therefore, it refers to forming a design of a plurality of colors having two or more hues formed by luminous storage, but the luminous multicolor interference coating only needs to have a part of the luminous coating different in color. In the book,
"Partially different color phosphorescent coating layer"). Specifically, it is a coating film having a design of a two-tone coating film or a design coating film.

The light-storing coat layer used in the method of forming a multi-color interference coating film of the present invention is preferably formed by forming a light-colored base coat layer on a substrate to be coated and partially forming a light-storing coat layer of a different color. It is a coating layer formed of a luminous paint containing a luminous pigment and a vehicle. The light-storing coat layer may contain a brilliant pigment and / or a coloring pigment as long as the light-storing function is not hindered. Further, the interference clear coat layer formed on the luminous coat layer may also contain a color pigment within a range that does not hinder the transparency.

[0012] Further, by adding a brilliant pigment and / or a coloring pigment to the above-mentioned luminous coating layer and a coloring pigment to the interference clear coating layer within a range not impairing the design, the luminous function, the interference or the transparency, the daytime or the like can be obtained. A hue is imparted to a coating film in which light emission cannot be visually recognized, and a luminous multicolor interference coating film can be formed partially with a brilliant pigment and / or a coloring pigment. Luminescent pigments, even if they develop different colors due to phosphorescence, cannot be designed in a bright place because they are not white and multicolored, and as described above, by using a brilliant pigment and / or a coloring pigment, during daytime, The multicolor interference coating film can be visually recognized with the brilliant pigment and / or the coloring pigment, and at night, the multicolor design by the different color phosphorescent coating layer can be visually recognized.

The luminous pigment contained in the luminous coating layer in the method for forming a luminous multicolor interference coating film of the present invention has an emission spectrum (emission peak wavelength of 520 nm) close to the spectrum of human luminosity, and In addition to exhibiting a broad excitation spectrum (emission peak wavelength of about 365 nm) with high excitation efficiency even for ultraviolet rays in a short wavelength region, the afterglow luminance is ZnS: Cu (about 0. 1) conventionally used widely.
4 cd / m ² ) or about 5 to 10 times or more (about 2 cd / m ² ).
m ² ), and the decay of the afterglow time is moderate. The luminous pigment has a performance of about 30 hours or more, which is about 5 to 10 times or more that of the conventional ZnS: Cu about 200 minutes. Here, the afterglow time refers to the time during which the afterglow luminance attenuates to 0.3 mcd / m ² after irradiating with an illuminance of 1000 lux for 5 minutes using a common light source D65. Light source D65
After irradiating for 5 minutes at an illuminance of 1000 looks using
It refers to the afterglow luminance after a lapse of one minute.

The above-mentioned luminous pigments are particles having a white color when not excited by light in the coating film and exhibiting a green or yellow color when excited by light. The diameter is between 2 and 60 μm. When the average particle size of the luminous pigment is less than 2 μm, the natural light emission and light emission reflectivity may decrease, while the average particle size is 60 μm.
If it exceeds m, the coating film performance may be affected.

As the luminous pigment, for example, "N Luminescent Luminova" (manufactured by Nemoto Special Chemical Co., Ltd.) can be used.

The content (PWC) of the luminous pigment in the luminous paint is preferably 1% to 60%, and more preferably 5% to 40%.
% Is more preferred. If it is less than 1%, sufficient luminous properties may not be obtained, and if it exceeds 60%, the coating film performance may be reduced.

The vehicle contained in the luminous paint dissolves or disperses the luminous pigment, and is composed of a resin for forming a coating film and, if necessary, a crosslinking agent. Examples of the coating film forming resin constituting the vehicle include (a) an acrylic resin, (b) a polyester resin,
(C) alkyd resin, (d) fluorine resin, (e) epoxy resin, (f) polyurethane resin, (g) polyether resin, and the like. These may be used alone or in combination of two or more. it can. In particular, acrylic resins and polyester resins are preferably used.

The resin for forming a coating film includes a curable type and a lacquer type, and usually, a curable type is used. In the case of a type having curability, it is used as a mixture with a crosslinking agent such as an amino resin, a (block) polyisocyanate compound, an amine-based, a polyamide-based, or a polyvalent carboxylic acid, and the curing reaction proceeds at heating or at room temperature. be able to. Further, a lacquer type coating film forming resin having no curability can be used in combination with a type having curability.

When the vehicle contains a cross-linking agent, the ratio of the resin for forming a film to the cross-linking agent is 90 to 50% by weight and the content of the cross-linking agent is 10 to 50% by weight in terms of solid content. Preferably, the coating film forming resin is 85 to 60% by weight, and the crosslinking agent is 15 to 40% by weight. If the crosslinking agent is less than 10% by weight (the resin for forming a coating film exceeds 90% by weight), the crosslinking in the coating film is not sufficient. On the other hand, when the cross-linking agent exceeds 50% by weight (the resin for forming a coating film is 50% by weight)
), The storage stability of the luminous paint decreases and the curing speed increases, resulting in poor coating film performance.

The above-mentioned luminous paint can contain the following brilliant pigments and / or coloring pigments in amounts not to impair the luminous properties. Aluminum flake pigments, metal oxide-coated alumina flake pigments, metal oxide-coated silica flake pigments, graphite pigments, interference mica pigments, colored mica pigments, metal titanium flake pigments, stainless flake pigments, plate-like iron oxide pigments as the above-mentioned brilliant pigments Phthalocyanine flake pigment, metal-plated glass flake pigment, metal oxide-coated glass flake pigment or hologram pigment. Organic coloring pigments as the coloring pigment, for example, azo lake pigments, phthalocyanine pigments, indigo pigments, perylene pigments, quinophthalone pigments, dioxazine pigments, quinacridone pigments, isoindolinone pigments, metal complex pigments and the like And the inorganic coloring pigments, for example, yellow iron oxide,
Bengala, titanium dioxide, carbon black and the like.

In addition to the above components, the luminous paint also comprises
Polyamide wax which is a lubricant dispersion of aliphatic amide and polyethylene wax which is a colloidal dispersion mainly composed of polyethylene oxide, anti-settling agent, curing catalyst, ultraviolet absorber, antioxidant, leveling agent, silicone and organic polymer Surface conditioning agents, anti-sagging agents, thickeners, defoamers, etc.
A lubricant, a crosslinkable polymer particle (microgel) and the like can be appropriately added and contained. The performance of paints and coatings can be improved by blending these additives in a proportion of, for example, 15 parts by weight or less with respect to 100 parts by weight of the vehicle (based on solid content).

The luminous paint is usually provided in a form in which the above components are dissolved or dispersed in a solvent. Any solvent may be used as long as it dissolves or disperses the vehicle, and an organic solvent and / or water may be used. Examples of the organic solvent include those commonly used in the field of coatings. Examples thereof include hydrocarbons such as toluene and xylene, ketones such as acetone and methyl ethyl ketone, esters such as ethyl acetate, cellosolve acetate, and butyl cellosolve, and alcohols. When the use of an organic solvent is regulated from the viewpoint of the environment, it is preferable to use water. In this case, an appropriate amount of a hydrophilic organic solvent may be contained. The luminous paint may be of a solvent type or a powder type.

When the luminous paint is a solvent paint, a one-pack paint or a two-pack paint such as a two-pack urethane resin paint may be used. For dispersing each of the above components, a device such as a paint shaker, a ball mill, a sand grind mill, a kneader, and the like, which are usually used in the production of paint, can be used.

Interference Clear Coat Layer In the method for forming a luminous multicolor interference coating film of the present invention, after forming the luminous coat layer, an interference clear coat layer containing an interference pigment is formed. Is a coating layer formed by an interference paint containing an interference pigment and a vehicle. In the present specification, the term "interference" refers to the case where the formed coating film is viewed from almost directly above, and the case where the coating film is viewed from approximately 15 degrees with respect to the coating film at an overhead angle of about 15 degrees. In the mica particle feeling is recognized,
When viewed from a bird's-eye angle of about 15 degrees with respect to the coating film, mica particles are not recognized.

As the vehicle contained in the interference coating, the vehicle used in the luminous coating can be used. As the interference pigment, at least one pigment selected from mica pigments, alumina flake pigments, silica flake pigments, titanium flake pigments, and hologram pigments, preferably mica pigments, is used. As such a mica pigment, a pearl mica pigment obtained by coating a surface of natural muscovite or synthetic mica with a thin film of titanium oxide, iron oxide, or a metal oxide such as chromium, cobalt, tin, and zirconium to impart a coloring effect. Having a particle size range of 1 to 60.
μm, preferably 1 to 40 μm, and an average particle size of 15 to 25.
μm scaly particles can be mentioned. The interference color of the mica pigment can be adjusted by changing the type and amount (coating thickness) of the metal oxide to be coated. The content (PWC) of the interference pigment in the interference coating is preferably 0.1 to 30%, more preferably 0.5 to 15%.
contains. When the amount is less than 0.1%, the color flop effect when the object is viewed in the daytime or in a bright condition may not be sufficiently obtained, and when it exceeds 30%, the coating film performance may be deteriorated.

In the above-mentioned interference paint, the vehicle, coloring pigment, additive and solvent used in the above-mentioned luminous paint can be used. When a coloring pigment is contained, the amount of addition may be in a range that does not impair the transparency. Various extenders such as calcium carbonate, barium sulfate, clay, and talc can be used in combination. The interference clear coat layer may be formed from a solvent type paint or a powder type paint. As the solvent-type paint, a one-pack paint may be used, or a two-pack paint such as a two-pack urethane resin paint may be used. The vehicle and other components are the same as those used in the above-mentioned luminous paint.

Formation of Top Clear Coat Layer In the method of forming the luminous multicolor interference coating film, after forming the luminous coat layer and then the interference clear coat layer, a top clear coat layer is formed thereon. The top clear coat layer in this case is a layer that does not cover the lower coating layer. By forming a top clear coat layer on the interference clear coat layer, it is possible to improve gloss and prevent interference pigment from protruding. As the top clear coat layer, a colorless and transparent clear coating film can be used, and further, a so-called turbid clear coating film or a color clear coating film having a translucency may be used. As the top clear coating, those generally used for top coating can be used, and the vehicle of the above-mentioned luminous coating can be used. When used as a top clear coat layer, use Japanese Patent Publication No. Hei 8-19315.
The clear paint containing a carboxyl group-containing polymer and an epoxy group-containing polymer described in JP-A No. 5-235071 is preferably used from the viewpoint of acid rain resistance.

These top clear paints may be used, if necessary, as long as the transparency is not impaired, provided that the above-mentioned color pigments, extenders, modifiers, ultraviolet absorbers, leveling agents, dispersants, defoamers, etc. It is possible to mix additives such as agents. Further, the top clear coat layer may be formed from a solvent type paint or a powder type paint. As the solvent-type paint, a one-pack paint may be used, or a two-pack paint such as a two-pack urethane resin paint may be used. Vehicle,
Other components are the same as those used in the above-mentioned luminous paint.

Formation of Light Base Coat Layer The light base coat layer preferably used in the method of forming the luminous multicolor interference coating film is formed as a lower coating film of the luminous coat layer. By forming the light-colored base coat layer, it is possible to sharpen the color of light stored in the light storage coat layer. The light-colored base coat layer contains a coloring pigment, and it is preferable that the light-colored base coat layer has a brightness equal to or higher than the Munsell display system lightness N6. The light-colored base coat layer can be formed by a solvent type paint or a powder type paint. As the solvent-type paint, a one-pack paint may be used, or a two-pack paint such as a two-pack urethane resin paint may be used. The vehicle and other components are the same as those used in the above-mentioned luminous paint.

Coating Film Forming Procedure In the method for forming a phosphorescent multicolor interference coating film of the present invention, a multilayer coating film is formed by the following procedure.

A light-colored base coat layer is preferably formed on the substrate to be coated. When the light-colored base coat layer is formed, its thickness is preferably from 20 to 50 μm. If the thickness is outside this range, the coating film performance may be insufficient. More preferably, it is 25 to 35 μm.

In this case, the light-storing coat layer of a partially different color is formed on the light-colored base coat layer by a wet two-tone wet (W / W) method or a wet two-tone dry (W / D) method, and the design is performed. Can be expressed. Note that the W / W method is a method in which a base coat is applied, then dried by air drying or the like, and applied to an uncured or semi-cured base coat. This is a method in which the base coat is baked and applied to the cured base coat.

The appearance of the design by the luminous coat layer is such that a first color is formed on the entire surface and a desired design is formed thereon, or the first color is formed wider than the design.
The coating line can be masked with a masking material to form a coating film of the second and subsequent colors.

The luminous coat layer has a thickness of 5 to 60 μm.
If it is less than 5 μm, the luminous property may be insufficient, and if it exceeds 60 μm, poor coating film performance may occur. More preferably, it is 20 to 40 μm.

After the formation of the luminous coat layer, an interference clear coat layer is formed on the luminous coat layer by the W / W method or the W / D method. However, from the viewpoint of design, in the case where the coating is to be cut off with a masking material, the W / D method is used to apply the masking material.

The thickness of the interference clear coat layer is 5 to 25.
μm is preferred, and if it is less than 5 μm, the color flop effect due to interference cannot be sufficiently exhibited, and if it exceeds 25 μm, the coating film performance may be insufficient. More preferably, it is 15 to 20 μm.

On the interference clear coat layer thus formed, at least one top clear coat layer is formed. In the case where the interference clear coat layer contains a large amount of interference pigment or an interference pigment having a large particle size, forming two or more top clear coat layers can improve the color flop effect on the surface. When forming two or more top clear coat layers,
It is preferable to form the top clear coat layer of the outermost layer with a clear coating containing the above-mentioned carboxyl group-containing polymer and epoxy group-containing polymer for the same reason as described above.

The formation of the top clear coat layer can be carried out after the interference clear coat layer is cured, but the W / W method is carried out on the uncured or semi-cured interference clear coat layer. Can also be used. When the top clear coat layer is formed a plurality of times, baking may be performed at the same time after forming the final clear coat layer, and it is not necessary to completely cure at the stage when the clear coat layer is initially formed. The thickness of the top clear coat layer is preferably from 20 to 50 μm. If the thickness is outside this range, the coating film performance may be insufficient. More preferably, it is 25 to 35 μm.

The method for forming each coating layer is not particularly limited, but a spray method, a roll coater method, etc., and a powder coating is preferably applied by electrostatic coating, and may be applied a plurality of times. Drying conditions are, for example, baking at 80 to 160 ° C. for a predetermined time to obtain a coating film.

Multicolor phosphorescent coated article The multicolor phosphorescent coated article obtained by the method for forming a coating film of the present invention comprises a substrate coated with a multicolor phosphorescent coating layer, an interference clear coating layer, and then a top clear coating layer. A coat layer is formed on the substrate to be coated. Preferably, a light-colored base coat layer is formed before forming the phosphorescent coat layer. A more preferable range for the light color system is N8 or more in lightness.

The multicolor phosphorescent coated article of the present invention has a phosphorescent multicolor interference coating formed by the above-described method for forming a phosphorescent multicolor interference coating, and is used for automobile parts such as automobile bodies and automobile bumpers. , Motorcycle outer panels and parts, container outer surfaces, coil-coated building materials, home appliances, communication-related electrical equipment, etc. or doorway panels, switches, guidance signs,
Painted on guardrails, emergency equipment, evacuation equipment, etc.

[0042]

EXAMPLES Next, the present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to these examples. In addition, the compounding amount represents a weight part unless there is particular notice.

Examples 1 to 10 and Comparative Example 1 Preparation of luminous paint Acrylic resin (styrene / methyl methacrylate / ethyl methacrylate / hydroxyethyl methacrylate /
Methacrylic acid copolymer, number average molecular weight about 20,000,
A hydroxyl value of 45, an acid value of 15, and a solid content of 50% by weight, and a melamine resin (trade name, “Uban 20SE”, manufactured by Mitsui Chemicals, Inc., solid content of 60% by weight) are blended at a solids weight ratio of 80:20. The following phosphorescent pigment for the vehicle obtained
It was blended in the ratio shown in Table 1. Then, the organic solvent (toluene / xylene / ethyl acetate / butyl acetate weight ratio = 70)
/ 15/10/5) with a stirrer so as to obtain an appropriate coating viscosity to prepare a luminous paint.

<Luminescent pigment> 1: Luminescent pigment whose color after photoexcitation is yellow-green ("Luminova G-300", manufactured by Nemoto Special Chemical Co., Ltd.) 2: Blue-green color after photoexcitation Luminescent pigment ("Luminova BG-300", manufactured by Nemoto Special Chemical Co., Ltd.) 3: Luminescent pigment whose color after photoexcitation is violet ("Luminova V-300", manufactured by Nemoto Special Chemical Co., Ltd.)

Preparation of Substrate to be Coated A dull steel plate (300 mm in length, 300 mm in width and 0.8 mm in thickness) was treated with a zinc phosphate treating agent ("Surfdyne SD2").
000 "(manufactured by Nippon Paint Co., Ltd.), and then a cationic electrodeposition paint (" Power Top U-50 ", manufactured by Nippon Paint Co., Ltd.) was electrodeposited so that the dry film thickness became 25 [mu] m. Then, after baking at 160 ° C. for 30 minutes, the intermediate coating (“Olga S-90 Sealer Gray (N-
8) ", manufactured by Nippon Paint Co., Ltd.) was applied by air spraying so as to have a dry film thickness of 30 μm, and baked at 140 ° C. for 30 minutes to form a pale base coat, which was used as a substrate to be coated. However, in Example 1, the intermediate coating ("Olga S-90 Sealer Gray (N-8)", manufactured by Nippon Paint Co., Ltd.) was omitted.

Method for Forming Luminescent Multicolor Interference Coating Film The above-mentioned luminous paint was applied to the above-mentioned base material in combination with the luminous paint obtained in the above Table 1 on a half surface so that the dry film thickness for the first color became 30 μm. To form a phosphorescent coat layer of the first color,
Bake at 140 ° C. for 30 minutes. Thereafter, the coating film of the first color is covered, and the dried film thickness is 30 for the second color.
The remaining half surface was painted to a thickness of μm to form a second color phosphorescent coating layer, baked at 140 ° C. for 30 minutes, and the masking material was peeled off. The coating is performed by an electrostatic coating machine ("A
auto REA "(manufactured by ABB Industries) under an atomization pressure of 2.8 kg / cm ² . Then, an interference coating containing titanium dioxide-coated mica pigment (“Super Luck M-180 Mica Base”, manufactured by Nippon Paint Co., Ltd.) was applied to the entire surface so that the dry film thickness became 15 μm,
Set at room temperature for 10 minutes, then apply top clear paint over the entire surface to a dry film thickness of 35 μm,
Set at room temperature for 10 minutes and at 140 ° C for 30 minutes.
Bake for a minute. The clear paint used was an acrylic / melamine resin-based clear paint 1 ("Super Lac O-130 Clear", manufactured by Nippon Paint Co., Ltd.) or
Clear coating material 2 containing a carboxyl group-containing polymer and an epoxy group-containing polymer ("Macflow O-52").
0 clear ", manufactured by Nippon Paint Co., Ltd.). In Comparative Examples, the coating films shown in Table 1 were formed. The interference, luminous property and polychromaticity of the coating film obtained above were evaluated by the following evaluation methods. Table 1 shows the results.

[0047]

[Table 1]

Evaluation method (interference) When the coating film after formation is viewed from almost right above (A)
Then, the state of the coating film was visually evaluated when viewed at a bird's-eye angle of about 15 degrees with respect to the test piece (B). 3 ... (A), the mica grain feeling is recognized, and (B), the mica grain feeling is not recognized. 2 ... (A), the mica grain feeling is almost recognized, (B)
No mica particle feeling was observed in the samples 1 ... (A) and (B) no mica particle feeling was observed (light storage) Each of the coating films obtained above was subjected to JIS Z 9100
(Luminescent safety signboard) After storing for 3 hours in a dark place with the outside light blocked by 8.3, irradiate the light of a fluorescent lamp with a brightness of 200 lux for 30 minutes, stop irradiation, and after 60 minutes Of each coating film was visually evaluated. 4: There is a feeling that light is sufficiently emitted 3: There is a feeling that light is emitted 2: Weak but light is emitted and recognition is possible 1: No light is emitted (polychromatic) The above luminous property The appearance of the coating film when the degree of light emission in the evaluation was evaluated was visually evaluated. 3: The hue of the first color and the hue of the second color are distinctly different, and are recognized as a luminous coating. 2 ... The hues of the first color and the second color are temporarily different, and are substantially recognized as a luminous coating. There is no difference in hue between the first color and the second color, and it is not recognized as a luminous coating film

As is clear from the results shown in Table 1, this example is a coating film formed by the method for forming a luminous multicolor interference coating film of the present invention, and a coating film exhibiting coherence and polychromaticity was obtained. A design was formed as a film, and a coated article having good light storage properties and improved visibility in nighttime situations was obtained.
On the other hand, in the comparative example, at least one of the coherence and the light storing property was not good.

[0050]

As described above, the present invention relates to a method for forming a luminous coating layer containing a vehicle and a luminous pigment on a substrate to be coated, wherein the luminous coating layer is partially different in luminous coating layer. By the method of forming as a polychromatic by the luminous coating, after excitation by light, even in the dark field, due to the development of the different colors of the luminous pigment that was excited, it is visually recognized as a two-tone coating, and even at night or dark Under certain circumstances, the coating film automatically emits light, so that the safety surface is further improved by improving the visibility, and the color flop is developed by the interference action of the interference clear coat layer formed on the phosphorescent coating layer. .

Specific examples of use include automobile bodies, automobile parts such as automobile bumpers, vehicle outer panels and parts such as motorcycles, outer surfaces of containers, coil-coated building materials, home appliances, communication-related electric equipment, and doorways. Panels, staircase edges, switchboards, handrails, handles, guidance signs,
Painted on guide rails, emergency equipment, evacuation equipment, etc.

Continued on the front page F term (reference) 4D075 AE02 AE03 CA33 CA44 CB06 CB08 CB13 CB37 DA06 DB02 DB06 DB07 DB12 DB13 DB18 DB20 DB21 DB36 DB38 DB40 DB43 DB47 DB48 DB50 DB53 DB61 DC01 DC05 DC10 DC12 DC13 DC18 DC41 EA43 EB20 EB16 EB22 EB35 EB36 EB37 EB38 EB39 EB45 EC11

Claims (7)

[Claims] 1. A method for forming a luminous coating layer containing a vehicle and a luminous pigment on a substrate to be coated, comprising: forming the luminous coating layer as a partially different luminous coating layer; Forming an interference clear coat layer containing an interference pigment, and further forming a top clear coat layer on the interference clear coat layer. 2. The method for forming a luminous multicolor interference coating film according to claim 1, wherein said luminous coating layer further contains a brilliant pigment and / or a coloring pigment. 3. The method for forming a luminous multicolor interference coating film according to claim 1, wherein the interference clear coat layer contains a color pigment. 4. The method for forming a luminous multicolor interference coating film according to claim 1, wherein a light-colored base coat layer is formed below the luminous coating layer. 5. The method for forming a luminous multicolor interference coating film according to claim 1, wherein said luminous coating layer is a two-tone coating film or a design coating film. 6. The method for forming a luminous multicolor interference coating film according to claim 1, wherein the substrate to be coated is an automobile body. 7. A multicolor phosphorescent coated article obtained by the method for forming a phosphorescent multicolor interference coating film according to any one of claims 1 to 6.