JP2002226786A - Luminescent paint composition, coating film forming method and luminous paint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light accumulating coating composition which has strong luminosity (or light-emission) and excels in weatherability and water resistance, a coating film-forming method, and a light accumulating coated material obtainable by this method. SOLUTION: A light accumulating coating film layer is formed by coating a light accumulating coating composition comprising a silicate based light accumulating pigment and a vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phosphorescent coating composition containing a silicate phosphorescent pigment and a vehicle, a method for forming a coating film, and a phosphorescent coated article obtained by this method.

[0002]

2. Description of the Related Art Conventionally, phosphorescent pigments (long afterglow phosphors) have been used.
Are known as ZnS: Cu, (Ca, Sr) S: Bi phosphors, and ZnS: C is used as a luminous paint.
u-phosphors are widely used. Such a luminous pigment absorbs light such as sunlight or fluorescent light and is excited (luminous).
It has the property of emitting light in a dark place. In addition, light absorption-
The phosphorescent pigment can be used repeatedly as many times as necessary, so phosphorescent pigments can be used for signs and signs for disaster prevention and safety, signs for various places in automobiles and buildings, accessories such as tie pins and pendants, and watches. Widely used for fishing gear such as dials, floats and lures.

The notation ZnS: Cu or ZnS / Cu indicates that the host crystal is ZnS (zinc sulfide) and the activator is Cu (copper). The activator forms an emission center (a local place in the crystal where the excitation energy is finally converted to light) in the host crystal.

As another example of a luminous pigment, for example, JP-A-61-40382 discloses a luminous pigment, a synthetic resin,
A “light-emitting spray paint” containing a light-permeable powder and an organic solvent has been proposed. Here, as the phosphorescent pigment, zinc, cadmium, sulfides such as alkaline earth rare metals are exemplified, and as the light-permeable powder, glass, mica,
Examples thereof include inorganic powders such as silica, and organic powders such as plastic, cellulose, and starch. Further, it is disclosed that 1 to 50 parts by weight of the light-transmitting powder is added to 100 parts by weight of the luminous pigment.

Japanese Unexamined Patent Publication (Kokai) No. 3-180605 discloses a "composite material" in which ceramic particles and inorganic light emitting particles are mixed in a resin having a light transmitting property. . Here, as the ceramic particles, glass-based and alumina-based particles are exemplified, and as the inorganic light-emitting particles, tritium, promethium, and other sulfides in which a trace amount of a radioactive substance is mixed are exemplified. I have.

However, the above-mentioned phosphorescent pigments such as ZnS: Cu have extremely low afterglow luminance, the afterglow is attenuated rapidly, and there is no luminance that can be visually recognized overnight. There is also a method proposed in Japanese Patent Application Laid-Open No. 3-180605, in which a radioactive substance is added and the phosphorescent pigment or the like is excited by the radiation to cause the phosphorescent pigment to emit light for a long period of time. There is a problem in that a light storage medium that touches the human body has to be treated under a standard, and the processing area and the like are limited, and the disposal of waste requires a large amount of cost.

However, in recent years, strontium aluminate (SrAl ₂ O ₄ ) phosphor (phosphorescent pigment) has been developed (Japanese Patent No. 2543825 (Japanese Patent Application Laid-Open No. 7-11250)), and SrAl ₂ O ₄ is used as a host crystal. Rare earth elements europium (Eu) and dysprosium (Dy)
Phosphor (SrAl) to which is added an activator
₂ O _4: Eu ^2+: a Dy ³⁺⁾ "N luminous Ruminoba"
(Nemoto Special Chemical Co., Ltd.) has been attracting attention.

The SrAl ₂ O ₄ phosphorescent pigment is prepared by adding an activator such as Eu to a predetermined amount of SrCO ₃ (purity 99.2%), Al ₂ O ₃ (purity 99.9%) and flux as raw material powders. It is synthesized by adding, mixing, and firing at a high temperature of 1200 ° C. or more in a reducing atmosphere for 3 hours.

The luminous pigment SrAl ₂ O ₄ has an emission spectrum similar to that of human luminosity (emission peak wavelength: 520 nm), and has a broad excitation spectrum having a high excitation efficiency even for ultraviolet rays in a short wavelength region. (Emission peak wavelength: about 365 nm), and has excellent basic performance as a luminous pigment. Further, the afterglow luminance is conventionally widely used ZnS: Cu (about 0.4 cd / m ²⁾ about 5 to 10 times or more the (2.0cd / m ²⁾ and very high, the afterglow The attenuation is also moderate (conventional ZnS: C
u is about 5 to 10 times or more compared to about 200 minutes (about 2000
Minutes or more). ).

Several products using the luminous pigment SrAl ₂ O ₄ have been proposed.

For example, Japanese Patent Application Laid-Open No. 7-48532 discloses a "decorative member with a luminous paint" in which a luminous luminous paint having aluminum strontium oxide as a light-emitting substrate is formed on the outer surface, such as a decorative member such as a clock face. Proposed.

Japanese Patent Application Laid-Open No. Hei 7-313036 proposes a method for attracting insects using a fluorescent substance containing at least SrAl ₂ O ₄ .

Further, Japanese Patent Application Laid-Open No. 8-207194 discloses that a first transparent resin layer is provided on a base material layer having a reflective surface.
A luminous layer formed by sequentially laminating a luminous layer and a second transparent layer, the luminous pigment of the luminous layer is SrAl ₂ O ₄ , and the luminous layer is hermetically covered with the first and second transparent resin layers. Body "has been proposed.

Furthermore, Japanese Patent Application Laid-Open No. Hei 8-127937 discloses a "fiber product having luminous fluorescence" formed by blending a luminous phosphor with a thermoplastic resin. _1-X Al ₂ O _4-X A compound having a composition represented by _X , wherein M is a compound obtained by using, as a mother crystal, a compound comprising at least one metal element selected from the group consisting of calcium, strontium, and barium. And X is -0.
A fiber product using a material in the range of 33 ≦ X ≦ 0.60 has been proposed.

[0015]

However, in recent years, there has been an increasing demand for a coating composition having a higher light-storing property (or light-emitting property). Luminescent paints or fluorescent paints do not fully meet the demands.

In addition, the above-mentioned conventional luminous paint composition and the like have insufficient weather resistance and water resistance in order to be used as a paint for products used outdoors, such as automobile wheels.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a luminous paint composition having a strong luminous property (or luminous property) and excellent weather resistance and water resistance.
An object of the present invention is to provide a method for forming a coating film and a luminous paint obtained by the method.

[0018]

In order to achieve the above-mentioned object, a luminous coating composition of the present invention is characterized by containing a silicate-based luminous pigment and a vehicle.

Here, the silicate-based luminous pigment is M
₂ MgSi ₂ O ₇ (wherein M is at least Ca, Sr,
Ba). The solid content ratio (PWC) of the silicate phosphorescent pigment to 100 parts by mass of the solid content of the luminous paint composition is 0.01%.
It is preferably about 80%.

The method for forming a luminous coating film of the present invention comprises:
After forming a luminous coating layer with the luminous coating composition on a substrate, an interference clear coat layer containing an interference pigment is formed on the luminous coating layer, and a top clear coat layer is further formed thereon. It is characterized by doing.

Here, the top clear coat layer is
When formed from a paint containing (1) a carboxyl group-containing polymer and an epoxy group-containing polymer, (2) a fluororesin, or (3) a silicone resin, the weather resistance and acid rain resistance of the coating film can be enhanced. .

Before forming the phosphorescent coating layer,
A light-colored base coat layer may be formed in advance.
The lightness (N) of the light-colored base coat layer is 6-9.
5

Further, the method for forming a luminous coating film of the present invention comprises:
After forming an interference clear coat layer containing an interference pigment on a transparent base material, a luminous coating layer is formed on the interference clear coat layer with the luminous coating composition.

Here, after forming the luminous coat layer, a light-colored base coat layer may be formed.

As the interference pigment, at least one kind of pigment selected from the group consisting of mica pigment, alumina flake pigment, silica flake pigment, titanium flake pigment, glass flake pigment and hologram pigment can be used.

Further, the luminous coating material of the present invention can be obtained by forming a luminous coating film on the object to be coated by using the method of forming a luminous coating film of the present invention. Preferable examples of the object to be coated include tents, tennis courts, cars, interior and exterior decorations of buildings, advertising signs, and the like.

[0027]

Embodiments of the present invention will be described below in detail.

[Luminescent paint composition] The luminous paint composition of the present invention contains (A) a silicate phosphorescent pigment and (B) a vehicle. Hereinafter, these compositions will be specifically described.

(A) Silicate phosphorescent pigment The silicate phosphorescent pigment is strontium silicate (M ₂ M
gSi ₂ O ₇ ) (wherein M is at least one of Ca, Sr, and Ba) as a main component (base crystal).

That is, the luminous coating composition of the present invention comprises:
Since it contains a silicate phosphorescent pigment as the main component (base crystal), the coating formed by this composition has strong luminous (or light-emitting) properties and excellent weather resistance and water resistance. It has the property which was.

To this silicate phosphorescent pigment, europium (Eu), dyspronium (Dy) or the like can be added as an activator. For example, Eu and Dy are each contained at 0.5 mol with respect to the parent crystal.

It is preferable to further add boron and phosphorus to the silicate phosphorescent pigment.

The silicate phosphorescent pigment is in the form of particles, and has an average particle diameter of 1 to 100 μm, preferably 5 to 30 μm. Examples of the silicate phosphorescent pigment include “E
VER-BRIGHT "(manufactured by Taiheiyo Keizai Kaisha, Ltd.).

The average particle diameter of the silicate phosphorescent pigment is 1 μm.
When the average particle diameter is less than 100 μm, it becomes difficult to form a coating film.

The silicate phosphorescent pigment is used in an amount of 0.01 to 8 parts by weight based on 100 parts by weight of the solid content of the luminous paint composition.
0% is preferable, but 5% to 80%, more preferably 2%
It is more preferable to contain 0 to 50%. When the content of the silicate phosphorescent pigment is less than 0.01%, there arises a disadvantage that the natural light emission and the light emission reflection are reduced.
If it exceeds 80%, there is a disadvantage that the adhesion as a coating film is reduced.

(B) Vehicle In the present invention, a thermosetting resin and a curing agent which can transmit light (in particular, ultraviolet light serving as excitation light) are used as the vehicle.

Here, as the thermosetting resin, acrylic resin, silicone-modified acrylic resin, polyester resin,
Base resins such as silicone-modified polyester resin and fluororesin can be used.

The amount of the thermosetting resin is 5 to 30 parts by weight, preferably 8 to 30 parts by weight, based on 100 parts by weight of the solid content of the paint.
It is 25 parts by weight, more preferably 10 to 20 parts by weight.

On the other hand, a thermoplastic resin can be used as the vehicle in the present invention. As the thermoplastic resin, chlorinated polyethylene, chlorinated olefin-based resins such as chlorinated polypropylene, vinyl chloride resin, vinyl acetate, vinylidene chloride, and vinyl resins copolymerized with these, and cellulose-based resins that can be generally used in the field of paints , Acetal resins, alkyd resins, chlorinated rubber resins and the like.

The coating composition of the present invention can be cured by ordinary temperature (natural) drying, forced drying, baking, etc., by selecting the above resin.

(C) Other Additives In the present invention, (a) a light emitting agent,
(B) coloring pigment, (c) extender pigment, (d) rust-preventive pigment,
Various pigments such as (e) interference pigments and (f) fluorescent pigments can be added.

(A) Light Emitting Agent As the light emitting agent, a compound represented by MAl ₂ O ₄ (wherein:
M is at least one element of Ca, Sr and Ba), specifically, CaAl ₂ O ₄ , SrAl ₂ O ₄ , Ba
Al ₂ O ₄ is mentioned. As a raw material of the light emitting agent, for example, "N Luminescent Luminova" (manufactured by Nemoto Special Chemical Co., Ltd.) can be used.

(B) Color Pigment As the color pigment, for example, an organic azo lake pigment,
Inorganic graphite such as insoluble azo pigment, condensed azo pigment, phthalocyanine pigment, indigo pigment, perinone pigment, perylene pigment, dioxazine pigment, quinacridone pigment, isoindolinone pigment, metal complex pigment, etc. ,
Yellow iron oxide, red iron oxide, carbon black, titanium dioxide and the like can be mentioned.

(C) Extender Pigment As the extender pigment, calcium carbonate, barium sulfate, clay, talc or the like can be used.

(D) Rust preventive pigments Various rust preventive pigments used for paints can be used according to the purpose.

(E) Interfering pigment As the interfering pigment, at least one kind of pigment selected from the group consisting of mica pigment, alumina flake pigment, silica flake pigment, titanium flake pigment, glass flake pigment and hologram pigment is used. Of these, glass flake pigments are preferably used.

(F) Fluorescent Pigment As the fluorescent pigment, a fluorescent whitening agent (such as Ubitex OB (manufactured by Ciba Geigy)) can be used.

It is preferable that the addition amount of the various pigments is 100 parts by weight or less when the total of the solid components of the thermosetting resin and the curing agent is 100 parts by weight.

Further, as other additives, a curing catalyst such as butyltin laurate dodecylbenzenesulfonate,
Additives such as benzophenone-based UV absorbers, antioxidants such as phenolic and sulfide-based, surface conditioners such as silicone and organic polymers, anti-sagging agents, thickeners, and rust inhibitors such as fumed silica. Can be used. These additives can be blended in an amount of 5 parts by weight or less when the total of the solid components of the thermosetting resin and the curing agent is 100 parts by weight.

In order to adjust the viscosity of the paint, aromatic hydrocarbons such as benzene, toluene, ethylbenzene and chlorobenzene, aliphatic hydrocarbons such as cyclohexane, ethylcyclohexane and perchloroethylene, ethyl acetate, butyl acetate and acetic acid are used. Esters such as isobutyl, acetone, methyl ethyl ketone, methyl isobutyl ketone,
Ketones such as cyclohexanone, isophorone, and diacetalcohol; ethers such as carbitol acetate and butyl carbitol; and solvents usually used in the coating field such as dioxane, tetrahydrofuran, dimethylformamide, nitropropane, styrene, mineral spirit, and water. Can be appropriately selected and used alone or as a mixture. The solid content at the time of coating is preferably 30 to 80%.

Each of the above components can be dispersed using an apparatus such as a paint shaker, a dissolver, a ball mill, a sand grind mill, or a kneader which is usually used for the production of paint.

[Coating film forming method] The base material on which the coating can be carried out using the phosphorescent coating composition of the present invention includes:
Iron, zinc-iron, zinc-aluminum, zinc-manganese,
Alloys such as zinc-cobalt, zinc-nickel-chromium, zinc-nickel-cobalt and zinc-nickel; metals including aluminum, magnesium, copper or various alloys; inorganic materials such as glass, cement and concrete; polyethylene Resin molded products such as polypropylene, ethylene-vinyl acetate copolymer, polyamide, polyacryl, polyester, ethylene-polyvinyl alcohol copolymer, acrylonitrile-butadiene-styrene resin, vinyl chloride resin, vinylidene chloride resin, polycarbonate, polyurethane and the like. Examples include plastic materials such as various FRPs, wood, and fiber materials.

It is optional to perform an appropriate cleaning treatment, chemical conversion treatment, or undercoat treatment on the substrate to be coated in advance.

The substrate to be coated is sequentially subjected to the step of forming a luminous coating layer using the luminous coating composition, the step of forming an interference clear coat layer containing an interference pigment, and the step of forming a top clear coat layer.

Here, the top clear coat layer is
It may be formed from a paint containing (1) a carboxyl group-containing polymer and an epoxy group-containing polymer, (2) a fluororesin, or (3) a silicone resin.

At this time, a light-colored base coat layer may be formed before forming the luminous coat layer.

On the other hand, when the substrate to be coated is a transparent substrate, the transparent substrate is subjected to a step of forming an interference clear coat layer containing an interference pigment, and A coat layer forming step is sequentially performed.

In this case, a light-colored base coat layer may be formed after forming the light-storing coat layer.

The interference clear coat layer is a coating layer formed by an interference paint containing an interference pigment and a vehicle.

Here, the same vehicle as that contained in the luminous paint composition can be used as the vehicle.

The coating can be performed directly on the substrate to be coated, but it is preferable to apply an epoxy-based, polyester-based, or epoxy polyester-based primer from the viewpoint of rust prevention. In addition, for example, in the case of painting an automobile alone, it is usually preferable to sequentially apply a primer and an intermediate coat (polyester / melamine) after electrodeposition treatment, and then apply after the coating is cured.
In particular, it is preferable to apply a primer to a plastic member such as an automobile bumper from the viewpoint of adhesion.

The thickness of the coating film can be appropriately selected according to the purpose. In addition, a multilayer coating film is a two-coat one-bake method, a two-coat two-bake method, a three-coat one-bake method,
It can be performed by a three-coat two-bake method, a three-coat three-bake method, or the like.

The luminous coating composition of the present invention containing the above-mentioned silicate phosphorescent pigment is applied as a coating to various substrate surfaces to be coated, and a single-layer or multilayer coating is applied to the substrate surface. A film is formed. Coating method is not particularly limited, air spray coating, airless coating, electrostatic coating, roll coating,
Conventional coating means such as curtain coating can be used.

[Luminescent coating] The luminous coating according to the present invention is obtained by the above-mentioned coating film forming method.

The baking conditions for the coating film were as follows: furnace temperature 70 to 200 ° C.
It is preferable to set it for about 3 to 30 minutes. Depending on the type of resin or substrate, it is also possible to form a coating film by drying at room temperature.

When the baking temperature is lower than the above range, the coating film is not sufficiently cured, so that the film formation becomes insufficient, the performance as the coating film is not obtained, and the corrosion resistance as the coating film is reduced. On the other hand, when the baking temperature is higher than the above range, the coating film is in a so-called overbaked state, which causes yellowing of the coating film and a decrease in adhesion.

The luminous paint of the present invention may be, for example, a doorway panel, an edge of a staircase, a switchboard, a handrail, a handle, a keyhole, a switch, a guidance display panel, a bumper, a guardrail, an emergency device, an evacuation device, and a precoat. It can be used for steel plates, automobile bodies and their parts (particularly aluminum wheels and bumpers).

[0068]

Next, the present invention will be described more specifically with reference to examples and comparative examples. In addition, the compounding amount represents a mass part unless there is particular notice.

[0069]

Examples 1 to 10 and Comparative Examples 1 and 2 [Preparation of base material] An aluminum plate (AC4C material) was sequentially subjected to a degreasing treatment and a treatment with a surface conditioner.
/ M ² so that the chromate treatment agent (“Alsurf 1
000 ", manufactured by Nippon Paint Co., Ltd.).

[Coating for forming base coat layer] The following coating materials were used for forming the base coat layer.

(1) Base paint A: Acrylic resin powder type clear paint ("Powax A50 Clear",
Nippon Paint Co., Ltd.).

(2) Base paint B: Acrylic resin powder black (N1) paint ("Powax A30 Black", manufactured by Nippon Paint Co., Ltd.).

(3) Base paint C: Acrylic resin-based powder type white (N9) paint ("Powax A30 White", manufactured by Nippon Paint Co., Ltd.).

(4) Base paint D: Acrylic resin-based solvent clear paint ("Super Lac M90 Clear", manufactured by Nippon Paint Co., Ltd.).

(5) Base paint E: Acrylic resin-based solvent-type black (N1) paint (“Super Rack M90 Black”, manufactured by Nippon Paint Co., Ltd.).

(6) Base paint F: Acrylic resin-based solvent-type white (N9) paint ("Super Lac M90 White", manufactured by Nippon Paint Co., Ltd.).

[Preparation of Luminescent Coating Composition] Acrylic resin (copolymer of styrene / methyl methacrylate / ethyl methacrylate / hydroxyethyl methacrylate / methacrylic acid, number average molecular weight: about 20,000, hydroxyl value: 4
5, acid value 15, solid content 50% by mass) and a melamine resin ("Uban 20SE", manufactured by Mitsui Chemicals, Inc., solid content 60% by mass) at a solid content mass ratio shown in Table 1 below. Luminescent pigments shown in Table 1 below were blended with the vehicle. Here, in Example 1 and Examples 5 to 10, a silicate phosphorescent pigment (phosphor color: pale yellow, emission color: yellow-green, particle size: 20 to 40 μm) was used as the above-mentioned phosphorescent pigment. In Example 2, a silicate phosphorescent pigment (phosphor color: white, emission color: orange, particle size: 20 to 40 μm) was used, and in Embodiment 3, a silicate phosphorescent pigment (phosphor color: shallow). White, emission color: blue, particle size: 40 to 65 μm), and in Example 4, a silicate phosphorescent pigment (phosphor color: white, emission color: blue, particle size: 20 to 40 μm) was used. .

As a comparative example, the luminous pigments shown in Table 1 (aluminate luminous pigments (phosphor color: pale yellow-green, emission color: yellow-green) in Comparative Example 1) and Comparative Example 2 Zinc sulfide phosphorescent pigment (phosphor color: pale yellow green,
Emission color: yellow-green / blue)) was prepared.

Next, an organic solvent (toluene / xylene /
Mass ratio of ethyl acetate / butyl acetate = 70/15/10 //
Each of the luminous paints was prepared by stirring and mixing with 5) with a stirrer so as to obtain an appropriate coating viscosity.

[Coating for Forming Interference Clear Coat Layer] As an interference coating for forming the interference clear coat layer, an acrylic melamine resin-based clear coating containing a glass flake pigment coated with titanium oxide was used. The particle size of the glass flake pigment was 90 μm.

[Coating Material for Forming Top Clear Coat Layer] The following coating materials were used as the clear coating material for forming the top clear coat layer.

(1) Clear paint A: Acrylic resin-based solvent-type clear paint ("Super Lac O-130 Clear", manufactured by Nippon Paint Co., Ltd.).

(2) Clear coating B: a solvent-type clear coating made of a blend of a carboxyl group-containing polymer and an epoxy group-containing polymer ("Macflow O-520 Clear", manufactured by Nippon Paint Co., Ltd.).

(3) Clear paint C: Acrylic resin-based powder clear paint ("Powax A-400", manufactured by Nippon Paint Co., Ltd.).

(4) Clear paint D: Two-component urethane solvent-based clear paint (“nx perioclear”,
Nippon Paint Co., Ltd.).

[Formation of multi-layer coating film]
Were formed in order. The base coat layer is formed such that the dry film thickness becomes 100 μm in a baking temperature of 160 ° C. for 30 minutes in the case of a powder type paint, and the dry film thickness becomes 30 μm in a baking temperature of 30 ° C. for 30 minutes in a solvent type paint. Then, the luminous coating layer was baked with the luminous paint shown in Table 1 at a baking temperature of 140 ° C. and a dry film thickness of 30 μm for 30 minutes.
m. Further, the interference clear coat layer was formed by applying the above-mentioned interference paint by air spraying so as to have a dry film thickness of 15 μm. The top clear coat layer has a dry film thickness of 100 μm in a baking temperature of 160 ° C. for 30 minutes in a powder type clear paint, and a dry film thickness of 40 μm in a bake temperature of 140 ° C. in 30 minutes in a solvent type clear paint. And a test piece having a multilayer coating film was formed.

[Evaluation method] <Weather luminous resistance> After a test of accelerated weather resistance (sunshine weatherometer) for 600 hours, a test piece subjected to a moisture resistance test (blister box, humidity of 98% or more, temperature of 50 ° C) was subjected to the following method. Was evaluated.

According to JIS Z 9100 (luminous safety signboard) 8.3, each coating film was stored in a dark place for 3 hours in a state where outside light was blocked, and then the light of a fluorescent lamp was irradiated at a luminance of 200 lux for 30 hours.
Irradiated for minutes. Five minutes after the irradiation was stopped, the degree of light emission of each coating film was visually evaluated.

A: There is a feeling that light is sufficiently emitted. ○… There is a feeling of emitting light. Δ: Light is emitted though weak, and recognition is possible. ×: Does not emit light.

Table 2 shows the results.

[0091]

[Table 1]

[0092]

[Table 2]

As is clear from the results in Table 2, in Examples 1 to 10, since the coating film was formed using the luminous paint containing the silicate phosphorescent pigment of the present invention, Comparative Example 1 was used. 2, a coating film having excellent weather luminous resistance was obtained.

[0094]

As described above, according to the present invention, the phosphorescent coating composition contains a silicate phosphorescent pigment as a main component (base crystal).
, A luminous coating film having excellent weather resistance and water resistance can be obtained. Further, according to the present invention, it is possible to provide a luminous paint composition having various luminescent colors (a luminous paint composition having various kinds of luminescent colors). Further, if an interference clear coat layer is formed,
Brightness can be imparted.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) C09D 7/12 C09D 7/12 127/12 127/12 163/00 163/00 183/04 183/04 201/02 201 / 02 (72) Inventor Masashi Takahashi 4-1-115 Minamishinagawa, Shinagawa-ku, Tokyo F-term in Japan Paint Co., Ltd. 4D075 AE03 CA13 CA32 CA33 CA38 CB06 CB08 DA06 DA23 DB02 DB05 DB06 DB07 DB12 DB13 DB20 DB21 DB35 DB36 DB37 DB38 DB40 DB43 DB48 DB50 DB53 DB61 DC01 DC05 DC10 DC12 DC13 DC38 EA02 EA07 EA43 EB12 EB13 EB14 EB15 EB16 EB19 EB22 EB32. HA446 HA486 HA546 KA06 KA08 KA20 NA01 NA03 NA04 NA19

Claims (10)

[Claims] 1. A phosphorescent coating composition containing a silicate phosphorescent pigment and a vehicle. 2. The silicate phosphorescent pigment is M ₂ MgS.
i (where, M is at least Ca, Sr, one in which one of Ba) ₂ O ₇ phosphorescent coating composition according to claim 1, wherein the compound represented by the. 3. The paint solid content of the luminous paint composition is 10.
Solid content ratio of silicate phosphorescent pigment to 0 parts by mass (P
The luminous coating composition according to claim 1, wherein WC) is 0.01 to 80%. 4. An interference clear containing an interference pigment on a luminous coating layer after forming a luminous coating layer on the substrate with the luminous coating composition according to any one of claims 1 to 3. A method for forming a luminous coating film in which a coat layer is formed and a top clear coat layer is further formed thereon. 5. The method according to claim 1, wherein the top clear coat layer comprises:
The method for forming a luminous coating film according to claim 4, wherein the method is formed from a paint containing a carboxyl group-containing polymer and an epoxy group-containing polymer, (2) a fluororesin, or (3) a silicon resin. 6. The method for forming a luminous coating film according to claim 4, wherein a light-colored base coat layer is formed before forming the luminous coating layer. 7. The luminous coating composition according to claim 1, wherein an interference clear coat layer containing an interference pigment is formed on a transparent substrate, and then the interference clear coat layer is coated on the interference clear coat layer. A method for forming a luminous coating film in which a luminous coating layer is formed from an object. 8. The method for forming a luminous coating film according to claim 7, wherein a light-colored base coat layer is formed after forming the luminous coating layer. 9. The pigment according to claim 4, wherein the interference pigment is at least one pigment selected from the group consisting of mica pigment, alumina flake pigment, silica flake pigment, titanium flake pigment, glass flake pigment and hologram pigment.
9. The method for forming a luminous coating film according to any one of items 1 to 8. 10. A luminous coating product obtained by the method for forming a luminous coating film according to any one of claims 4 to 9.