KR100372764B1 - A phosphorescent patint composition, a method for making this composition - Google Patents

Abstract

The present invention relates to a photoluminescent coating composition which is excellent in weatherability and afterglow brightness, harmless to the human body, and does not form precipitates and seeds during long-term storage, a method for producing the same, and a product using the photoluminescent paint.

The photoluminescent coating composition of the present invention has a long term afterglow property, chemically stable, 15% by weight of an inorganic photoluminescent pigment composed of an aluminate compound of an alkaline earth metal reviving europium or the like having excellent light resistance; 70 to 73% by weight of a binder resin having improved chemical properties such that sedimentation of the pigment does not occur even when stored for a long time; Diluent (organic solvent, water or reactive solvent) 10.9 to 15% by weight and other paint additives 0.8 to 25% by weight, characterized in that the phosphorescent pigment is dispersed in a composition consisting of the binder, diluent and additives It is done.

Therefore, the photoluminescent coating composition and the product using the same of the present invention are harmless to the human body, have excellent afterglow characteristics and afterglow luminance, and have excellent weather resistance. In particular, the coating composition of the present invention is convenient to store and use for a long time because the pigment does not settle or generate seeds even when stored for a long time.

Description

Phosphorescent paint composition, its manufacturing method {A PHOSPHORESCENT PATINT COMPOSITION, A METHOD FOR MAKING THIS COMPOSITION}

The present invention relates to a photoluminescent coating composition having excellent weather resistance and afterglow brightness, harmless to humans, and having a long afterglow characteristic, and a method of manufacturing the same, in particular, a phosphorescent light that does not form precipitates and seeds even during long-term storage. A coating composition, its manufacturing method, and the product using this photoluminescent paint.

Among the optical phenomena of the material, luminescence phenomena other than temperature radiation and Cherenkov radiation are collectively called luminescence, and are generally classified into fluorescence and phosphorescence.

Phosphors are light emitting phenomena that are instantaneous luminescent phenomena in contrast to phosphors, and intensity refers to luminescent parts that do not have significant temperature dependence, and temporal changes necessarily appear exponentially, and are classified as relatively short in terms of luminescence time, Although not classified as, it refers to a high luminance while an energy source is present.

Phosphor refers to the fact that the luminescence remains even when the stimulus source is removed in contrast to the phosphor and can be distinguished from the phosphor by the luminescence time, but the limit is unclear, and the intensity and attenuation time due to temperature or environment are large and attenuation Often, they are not exponential.

Both of these phosphors and phosphors are applied to places that need to be visually identified at night or in the dark, such as for safety signs or clock faces.

Phosphors and phosphors are not clear, but can be distinguished mainly by afterglow time, and phosphors that have a long afterglow time even when the energy source is removed may have a wider use.

Conventional phosphorescent pigments having a phosphorescent property is a zinc sulfide-based photoluminescent pigment mainly composed of zinc sulfide to which a small amount of copper is added, which has a very low afterglow effect. In other words, not only is the afterglow luminance that receives light and accumulates itself in a dark place, but also the afterglow time is extremely short within about 1 hour. More importantly, when used outdoors, weather resistance is poor and afterglow is lost within a week or two. Therefore, zinc sulfide-based photoluminescent pigments are rarely used in real life because they have no commerciality except in exceptional cases.

On the other hand, when the afterglow effect is to be maintained for a long time, it is possible to use a light-emitting paint prepared by mixing a conventional photoluminescent pigment, such as tritium, promethium-147, ranium-266 and the like. However, because of the use of radioactive substances, severe damage may occur when exposed to the human body, so strict caution is required for handling. In addition, because of the high cost of disposing use tools, cleaning waste water and the like, its use area is extremely limited.

Therefore, in order to solve such a problem, the Republic of Korea Patent No. 0170089 (Daehan Paint. Ink Co., Ltd.) is safe and easy to use in real life regardless of outdoors or indoors, it is harmless to the human body because it does not contain radiation substances, Disclosed is a photoluminescent coating composition which is excellent in afterglow effect and weather resistance and which is coated to be applied to any coating.

The photoluminescent coating composition is 10 to 90% by weight of an inorganic photoluminescent pigment, which is an alkaline earth metal aluminate complex composed of a complex of aluminum oxide and a salt consisting of calcium oxide, strontium oxide or magnesium oxide, activated by ions of rare earth metals, and the photoluminescent pigment. 5 to 50% by weight of a binder for imparting adhesion between the object and the coating material, 0.1 to 1% by weight of a wetting dispersant for aiding the dispersion and wetting of the photoluminescent pigment, and an antisettling agent for preventing sedimentation of the photoluminescent pigment during storage of the paint It consists of 10 to 90% by weight of a colorant comprising 0.5 to 5% by weight, antifoaming agent 0.1 to 1% by weight and solvent 4.3 to 40% by weight.

However, in the case of the photoluminescent paint composition, the phosphorescent (luminescent) property, which is a characteristic of the photoluminescent paint, is remarkably inferior because an inorganic sedimentation inhibitor such as aerosol and bentonite is used to prevent sedimentation of the photoluminescent pigment.

Therefore, there is a need for a new photoluminescent coating composition that not only has excellent phosphorescence characteristics but does not settle even if the coating is stored for a long time.

The present invention is directed to meeting this technical request.

That is, a first object of the present invention is to provide a chemically stable photoluminescent coating composition which not only has excellent photoluminescent performance but also does not generate sedimentation or seed of the photoluminescent pigment even when stored for a long time.

A second object of the present invention is to provide a method for producing the photoluminescent coating composition.

The present inventors have found that the luminous performance of the paint is significantly reduced when the anti-settling agent is added in order to prevent the sedimentation of the pigment generated during long-term storage of the phosphorescent paint. In addition, the present inventors can achieve electrical, chemical, and physical bonding with the photoluminescent pigment, and by using a binder resin having a high viscosity, a stable coating composition which does not cause pigment settling without deterioration of the photoluminescent performance of the paint can be obtained. Got to know.

The photoluminescent coating composition of the present invention has a long term afterglow property, chemically stable, 15% by weight of an inorganic photoluminescent pigment composed of an aluminate compound of an alkaline earth metal reviving europium or the like having excellent light resistance; 70 to 73% by weight of a binder resin having improved chemical properties such that sedimentation of the pigment does not occur even when stored for a long time; Diluent (organic solvent, water or reactive solvent) 10.9 to 15% by weight and other paint additives 0.8 to 25% by weight, characterized in that the phosphorescent pigment is dispersed in a composition consisting of the binder, diluent and additives It is done.

The inorganic photoluminescent pigment is a compound represented by MAl ₂ O ₄ .M ₁ Re, M is at least one metal element selected from the group consisting of calcium, strontium, barium, and M ₁ is a metal element of M Europium is an activator added in an amount of 0.001 to 10% by mole%, and Re is an active agent added in an amount of 0.001 to 10% by mole% to the metal element of M from the group consisting of cerium, ytterbium and lutetium. It consists of at least one element selected. (See Photoluminescent Phosphor of Korean Patent Publication No. 0145246)

As the inorganic phosphorescent pigment of the present invention it is more preferred to use _{SrAl 2 O 4, CaAl 2 O} 4.

The photoluminescent pigment has a spinel structure, the maximum emission wavelength is 440 ~ 580nm, luminosity (Luminosity) 2 ~ 10cd / ㎡, afterglow time up to 2000 minutes, specific gravity 3 ~ 3.6, Weather resistance and water resistance are good, and heat resistance is stable up to 400 degreeC. In particular, the photoluminescent pigment of the present invention can be widely used in jade and outside because it has no emission of harmful radiation to the human body, has a long light emission time and has excellent weather resistance.

The phosphorescent pigment is used 10 to 90% by weight during the coating composition formulation. When the phosphorescent pigment is used at less than 2% by weight, the density of the phosphorescent pigment in the paint is too low to obtain sufficient afterglow effect, and when used in excess of 90% by weight, the density of the phosphorescent pigment is too high. It is difficult to produce dispersed in a stable state.

As the binder resin of the present invention, alkyd resin, acrylic resin, polyester resin, epoxy resin, urethane resin, polyamide resin, UV curable resin, rubber chloride resin, melamine resin, urea resin, polyvinyl alcohol resin, polyvinyl ether resin, Emulsion resins and the like are used. In the present invention, these binders are selectively used alone or as composites depending on the type of the workpiece and the required physical properties of the coating film.

In addition, the binder of the present invention is characterized by selecting a binder resin having a special chemical structure and physical properties in order to prevent the sedimentation of the pigment caused by the load of the phosphorescent pigment.

Conventionally, a sedimentation inhibitor made of an inorganic material such as aerosil and bentonite has been added to prevent sedimentation of the pigment, but when the inorganic material is used to prevent sedimentation, there is a problem in that the luminous properties of the paint are deteriorated.

In other words, when the inorganic material is present in the paint, sufficient light is not supplied to the photoluminescent pigment, and the photoluminescence of the photoluminescent pigment generated by the light is inhibited by the electrical action of the inorganic material. You can't get performance.

Therefore, the present invention adopts a method of forming an electrical, chemical and physical bond between the binder and the pigment and a method of increasing the viscosity of the paint without adding an antisettling agent made of an inorganic material.

First, a polymer compound having a weight average molecular weight of 500,000 to 700,000 is selected as a binder resin to increase the viscosity of the paint, and a pigment anchor group is formed on the binder resin to form electrical, chemical and physical bonds between the phosphorescent pigment and the binder resin. Was introduced. In addition, polyamide (Polyamid) was introduced into the paint composition to form hydrogen bonds between the paint compositions. In particular, when a hydrogen bond is formed between the paint composition, when the paint is not used due to the viscoelastic properties through the rheology of the paint, the flow does not occur or settles, and the viscosity rapidly increases even when a small force is applied from the outside. It becomes lower and it is easy to use.

Examples of the pigment anchor group include a carboxyl group, a hydroxyl group, and an amine group, among which the carboxyl group is particularly excellent in bonding strength.

In general, the degree of the carboxyl group is expressed as an Acid Value, and the pigment anchor effect is in the range of 3 to 15. At this time, when the pigment anchor effect is 3 or less, there is no pigment anchor effect, and when it is 15 or more, corrosion resistance is remarkably inferior.

The degree of hydroxyl group is expressed by a hydroxyl value, and in general, when the paint is formed to be in the range of 5 to 15 after the coating film is formed, a pigment anchor effect appears. At this time, the pigment anchoring effect is less than 5, the water resistance, corrosion resistance, acid resistance is significantly lower than 15.

Amine groups have the best effect in organic pigments, but weak in inorganic pigments.

When the binder resin having the chemical and physical properties as described above is used in the photoluminescent coating composition, even if the coating is stored for a long time, no sedimentation or seed formation of the pigment can be used even after long-term storage.

In addition, the additive added to the photoluminescent paint composition of the present invention is 0.1 to 5% by weight of a wet dispersion agent to assist dispersion and wetting of the photoluminescent pigment, 0.5 to 10% by weight of viscoelasticity improver (polyamide), 0.1 to 5% by weight of an antifoaming agent, surface It comprises 0.1 to 5% by weight of the preparation.

The binder resin, the diluent, and other additives constitute a colorant for the coating composition of the present invention. The colorant refers to the remaining liquid portion except the photoluminescent pigment. When the coating film is formed, it is preferable to use a transparent one so as to maximize the contact between the photoluminescent pigment and light in order to maximize the afterglow effect.

In addition, when mixing and dispersing the photoluminescent pigment into the colorant, it is preferable to use a ceramic dispersion tool rather than using a dispersion tool containing iron.

When the paint is manufactured using a metal dispersion tool containing iron, the metal particles containing worn iron lower the transparency of the colorant. This results in blocking the contact between the pigment and light when forming the coating film, which is a factor that degrades the luminous performance of the paint.

When dispersing the photoluminescent pigment in order to prepare the photoluminescent paint composition of the present invention, a wet dispersant and a diluent are added, and the ceramic dispersing tool is added to grind and grinds to a particle size of 5 microns or less.

The binder resin is added to the composition thus dispersed, and additives such as a surface preparation, an antifoaming agent, a weathering aid, a diluent, and a drying agent are added thereto, followed by low speed stirring to prepare the photoluminescent coating composition of the present invention.

The paint composition prepared in this way is a general coating method such as fancy goods, stationery, artificial flowers, cosmetics, printed materials, toys, toys, clothing, safety signs, milestones, road signs and safety signs (air spray, airless spray, brush, roller, etc.). , Silk screen, UV coating, etc.) to obtain the required thickness (1 to 500 microns) to obtain a photoluminescent product excellent in weatherability and afterglow properties.

Other objects and advantages of the invention will be described below and will be appreciated by the practice of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the appended claims.

Hereinafter, preferred embodiments of the present invention will be described in detail.

<Production of Binder Resin>

Example 1

500 g of ethyl acetate and 46 g of isobutyl alcohol were added to a four neck flask, and the temperature was raised to 80 to 85 ° C. 307.6 g of methyl methacrylate, 40.3 g of butyl acrylate, 15 g of methylacrylic acid, and 1 g of azoisobutylnitrile were stirred and maintained for 3 hours after dropping for 4 hours.

As a result, a binder resin having a nonvolatile content of 40% and a viscosity of 650,000 and an acid value of 140,000 as measured by a Gardner viscometer with a V, 25 ° C casper chromatography was obtained.

Example 2

500 g of ethyl acetate and 58 g of xylene were added to a four neck flask and the temperature was raised to 80 to 85 ° C. 307.6 g of methyl methacrylate, 40.3 g of butyl acrylate, 65 g of 2-hydroxyethyl methacrylate, and 1 g of azoisobutylnitrile were stirred and maintained for 3 hours after dropping for 4 hours.

As a result, a binder resin having a nonvolatile content of 40% and a viscosity of 510,000 and a hydroxy value of 53 with a weight average molecular weight measured by Z, 25 ° C. permeation chromatography by a Gardner viscometer is obtained.

Comparative Example 1

250 g of ethyl acetate and 308 g of xylene were added to a four neck flask, and the temperature was increased to 100 to 120 ° C. 307.6 g of methyl methacrylate, 40.3 g of butyl acrylate, 65 g of 2-hydroxyethyl methacrylate, and 5 g of benzoyl peroxide are stirred and maintained for 3 hours after dropping for 4 hours.

As a result, a binder resin having a nonvolatile content of 40% and a viscosity of 70,000 and a hydroxy value of 53 with a weight average molecular weight measured by D, 25 ° C. permeation chromatography on a Gardner viscometer is obtained.

<Production of Coating Composition>

Example 1

Thermoplastic acrylic resin (methyl methacrylate, butyl acrylate, metaacrylic acid composition, glass transition temperature of 50 ℃, solid content 40%, Viscosity of Gardner V, binder value 14 resin) By mixing and dispersing by weight, 15% by weight of phosphorescent pigment (SrAl ₂ O ₄ ), 0.4% by weight of wet dispersant, 3% by weight of polyamide wax, 0.4% by weight of antifoaming agent, 0.3% by weight of surface preparation agent, and 10.9% by weight of solvent. A photoluminescent coating composition was obtained.

The coating composition thus prepared was dried at room temperature for 30 minutes to prepare a specimen having a viscosity of 60 g oil (KU) and a coating thickness of 60 microns.

Example 2

It is composed of thermosetting acrylic resin (methyl methacrylate, butyl acrylate, 2-hydroxyethyl methacrylate, glass transition temperature is 50 ℃, solid content is 40%, hydroxy value is 53, and viscosity is Gardner V. Phosphorus resin), a binder resin composed of 50% by weight of isocyanate curing agent resin (trade name: Bayer N330), 15% by weight of phosphorescent pigment (SrAl ₂ O ₄ ), 0.4% by weight of a wet dispersant, and 3% by weight of polyamide wax. The photoluminescent coating composition was obtained by mixing and disperse | distributing 0.4 weight% of antifoamers, 0.3 weight% of surface preparations, and 10.9 weight% of solvents.

The coating composition thus prepared was cured at 60 ° C. for 30 minutes to prepare a specimen having a spray coating viscosity of 13 seconds (pod cup # 4) and a coating thickness of 30 microns.

Example 3

It is composed of thermosetting acrylic resin (methyl methacrylate, butyl acrylate, 2-hydroxyethyl methacrylate, glass transition temperature is 50 ℃, solid content is 40%, hydroxy value is 53, and viscosity is Gardner V. Phosphorus resin), a binder resin consisting of 60% by weight of melamine curing agent resin (hexamethylenebutoxymelamine resin having a solid content of 45%), 15% by weight of phosphorescent pigment (SrAl ₂ O ₄ ), 0.4% by weight of a wet dispersant, poly The photoluminescent coating composition was obtained by mixing and disperse | distributing 3 weight% of amide wax, 0.4 weight% of antifoamers, 0.3 weight% of surface preparations, and 10.9 weight% of solvents.

The coating composition thus prepared was cured at 130 ° C. for 20 minutes to prepare a specimen having a spray coating viscosity of 13 seconds (pod cup # 4) and a coating thickness of 30 microns.

Comparative Example 1

It is composed of thermosetting acrylic resin (styrene, methyl methacrylate, butyl acrylate, 2-hydroxyethyl methacrylate, glass transition temperature is 50 ℃, solid content is 40%, hydroxy value is 53, and viscosity is Gardner viscosity. B) resin, luminous pigment (pigment of which the compound represented by ZnS: Cu) is composed of 60% by weight of resin) and 10% by weight of melamine curing agent resin (hexamethylenebutoxymelamine resin having a solid content of 45%). %, A wet dispersant 0.4% by weight, a polyamide wax 3% by weight, an antifoaming agent 0.4% by weight, a surface preparation 0.3% by weight, a solvent 10.9% by weight to mix and disperse to obtain a photoluminescent coating composition.

The coating composition thus prepared was cured at 130 ° C. for 20 minutes to prepare a specimen having a spray coating viscosity of 13 seconds (pod cup # 4) and a coating thickness of 30 microns.

Comparative Example 2

It is composed of thermosetting acrylic resin (styrene, methyl methacrylate, butyl acrylate, 2-hydroxyethyl methacrylate, glass transition temperature is 50 ℃, solid content is 40%, hydroxy value is 53, and viscosity is Gardner viscosity. Low-Z resin) and melamine curing resin (solid resin 45% hexamethylenebutoxymelamine resin) 10% by weight of the binder resin, phosphorescent pigment (aluminum oxide, calcium oxide, strontium oxide or magnesium oxide) Pigment) 15% by weight, 0.4% by weight of wet dispersant, 3% by weight of polyamide wax, 0.4% by weight of antifoaming agent, 0.3% by weight of surface aid, and 10.9% by weight of solvent to obtain a photoluminescent coating composition.

The coating composition thus prepared was cured at 130 ° C. for 20 minutes to prepare a specimen having a spray coating viscosity of 13 seconds (pod cup # 4) and a coating thickness of 30 microns.

Comparative Example 3

It is composed of thermosetting acrylic resin (methyl methacrylate, butyl acrylate, 2-hydroxyethyl methacrylate, glass transition temperature is 50 ℃, solid content is 40%, hydroxy value is 53, and viscosity is Gardner V. Phosphorus resin), a binder resin consisting of 63% by weight of melamine curing agent resin (hexamethylenebutoxymelamine resin having a solid content of 45%) and a phosphorescent pigment (aluminum oxide, calcium oxide, strontium oxide or magnesium oxide) ), A photoluminescent coating composition was obtained by mixing and dispersing 15% by weight, 0.4% by weight of a wet dispersant, 0.4% by weight of an antifoaming agent, 0.3% by weight of a surface aid, and 10.9% by weight of a solvent.

The coating composition thus prepared was cured at 130 ° C. for 20 minutes to prepare a specimen having a spray coating viscosity of 13 seconds (pod cup # 4) and a coating thickness of 30 microns.

<Paint Property Comparison Test>

1. Heat storage test

After storage at 60 ° C. for 7 days, film formation of the coating, precipitation of the pigment, and seed formation were examined. Examples 1, 2, and 3 and Comparative Examples 1 and 2 have no film formation and pigment settling and seed formation, but Comparative Example 3 has no film formation, pigment settling is severe, and seed is formed by aggregation of some pigments. It became.

2. Afterglow effect test and result

After the coating composition specimens were stored for 72 hours by blocking light in the room, after irradiating for 4 minutes at a roughness of 200 lux in a dark room, afterglow luminance was measured.

Afterglow luminance measurement result Afterglow luminance (mcd / ㎡) Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 1 hour later 12.1 10.9 11.5 _ 13.6 4 hours later 11.0 10.9 11.0 _ 1.7 11 hours later 6.0 6.0 7.5 _ _ 12 hours later 2.8 3.0 3.6 _ _

As can be seen from Table 1, it can be seen that the afterglow luminance of the embodiment of the present invention is much superior to that of the comparative example over time. In particular, in the case of Comparative Example 1 it can be seen that after 1 hour does not remain afterglow.

3. Experimental Results

After exposing the coating composition specimens outdoors for 1000 hours on the roof, that is, the light was blocked for 72 hours in the room, and then stored for 72 hours in a dark room, irradiated for 4 minutes at an illuminance of 200 lux, the afterglow luminance was measured, and the delta was measured. .

Afterglow luminance measurement result Afterglow luminance (mcd / ㎡) Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 1 hour later 11.6 11.0 12.0 _ 16.0 4 hours later 11.7 11.3 12.3 _ 1.5 11 hours later 7.5 6.9 8.5 _ _ 12 hours later 2.7 4.0 3.5 _ _

Weathering Results Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 δE 1.1 0.9 1.2 0 1.2

As can be seen from Tables 2 and 3, in the case of Comparative Example 1 using ZnS as a photoluminescent pigment, it can be seen that the weather resistance is poor and the luminescence is also poor enough that it cannot be used at all for the outdoor exposure.

In addition, in the case of Comparative Example 2 using a composite of aluminum oxide, calcium oxide, strontium oxide or magnesium oxide as a photoluminescent pigment, weather resistance is not largely a problem, but it can be seen that afterglow is poor.

That is, it can be seen that the coating composition of the present embodiment is superior in weather resistance, outdoor exposure, and the like, compared to the coating composition of the comparative example.

The present invention is not limited to the above-described embodiments, and various modifications and variations are made by those skilled in the art within the equivalent scope of the technical concept of the present invention and the claims to be described below. Of course it is possible.

The photoluminescent coating composition and the product using the same of the present invention are harmless to the human body, have excellent afterglow characteristics and afterglow luminance, and have excellent weather resistance. In particular, the coating composition of the present invention is convenient to store and use for a long time because the pigment does not settle or generate seeds even when stored for a long time.

Claims (8)

As a photoluminescent coating composition which is harmless to human body and excellent in long afterglow time and seizure stability, The photoluminescent composition is (A) 15% by weight of an inorganic photoluminescent pigment represented by MAl ₂ O ₄ .M ₁ Re; (Wherein M is at least one metal element selected from the group consisting of calcium, strontium and barium, the M ₁ is europium as an activator added in an amount of 0.001 to 10% in mol% to the metal element of M, Re is an active agent added in an amount of 0.001 to 10% in mol% based on the metal element of M, and is composed of at least one element selected from the group consisting of cerium, ytterbium, and ruthetium) (B) a binder having a weight average molecular weight of 500,000 to 700,000 and including any one of a carboxyl group, a hydroxyl group or an amine group in order to impart adhesiveness between the photoluminescent pigment and the coated object and to have light stability even when stored for a long time. 70 to 73% by weight of resin; (C) 10.9 to 15% by weight of a diluent consisting of water, an organic solvent or a reactive solvent; And (D) 0.8 to 25% by weight paint additives; Thus, even if the photoluminescent composition is stored for a long time, no sedimentation or seeding of the pigment occurs. The method of claim 1, The binder resin Group containing alkyd resin, urethane resin, acrylic resin, epoxy resin, polyester resin, polyamide resin, UV curing resin, chlorinated rubber resin, melamine resin, urea resin, polyvinyl alcohol resin, polyvinyl ether resin and emulsion resin A photoluminescent composition, characterized in that the composite of at least one polymer compound selected from. The method of claim 2, The paint additive (Iii) 0.1 to 5% by weight of a wet dispersant to help disperse and wet the photoluminescent pigment; (Ii) 0.5 to 10% by weight of a viscoelasticity modifier for forming hydrogen bonds between the paint compositions to improve the viscoelasticity of the paint composition; (Iii) 0.1 to 5% by weight of an antifoaming agent; (Iii) 0.1 to 5% by weight of the surface preparation comprises a photoluminescent coating composition. The method of claim 3, wherein The photoluminescent coating composition, wherein the viscoelasticity improving agent is polyamide. As a method for producing a photoluminescent coating composition that is harmless to human body and has excellent long afterglow time and seizure stability, 15 weight% of inorganic photoluminescent pigments represented by MAl ₂ O ₄ .M ₁ Re; (Wherein M is at least one metal element selected from the group consisting of calcium, strontium and barium, the M ₁ is europium as an activator added in an amount of 0.001 to 10% in mol% to the metal element of M, Re is an active agent added in an amount of 0.001 to 10% in mol% based on the metal element of M, and is composed of at least one element selected from the group consisting of cerium, ytterbium, and ruthetium) A weight average molecular weight of 500,000 to 700,000, 70 to 73% by weight of a binder resin containing any one of a carboxyl group, a hydroxyl group or an amine group; 10.9 to 15% by weight of a diluent consisting of water, an organic solvent or a reactive solvent; And a colorant comprising 0.8 to 25% by weight of an additive for paint, comprising a wet dispersion agent, a viscoelastic improver, an antifoaming agent, a surface preparation agent, and the like; A method of producing a photoluminescent coating composition, characterized in that the phosphorescent pigment is dispersed in the colorant and mixed. delete delete delete