JP2000007952A - Self-luminous road marking paint and glass bead for road marking paint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a self-luminous road marking paint possessed of visible afterglow by light accumulation in the daytime, and glass beads for road marking paints. SOLUTION: A self-luminous road making paint comprises a light accumulating type fluorescent substance powder having an average particle diameter of 5-90 μm and capable of withstanding a temperature of not lower than 900 deg.C having been incorporated into a glass bead-containing hot-melt paint. The road marking paint glass beads comprise the light accumulating type fluorescent substance powder having an average particle diameter of 5-90 μm and capable of withstanding a temperature of not lower than 900 deg.C having been mixed thereinto in the course of molding the glass beads and have a refractive index of 1.50-1.64. The self-luminous road marking paint enables road marking by visible self-luminescence in the nighttime and enables the application of such self-luminous road marking paint by the conventional and general application method. The road marking paint glass beads enable road marking by visible self-luminescence in the nighttime by glass beads.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-luminous road marking paint provided with a road marking function using visible afterglow due to daylight storage.

Another aspect of the present invention relates to a glass bead for a road marking paint having a self-luminous property.

[0003]

2. Description of the Related Art High brightness and visible long time due to light emission (phosphorescence) generated by transition of excited electrons such as ions added to a crystalline inorganic compound at different multiplicities (excited triplet and ground singlet, etc.). Phosphorescent phosphors (typically, sulfide-based and oxide-based) having the afterglow (ie, long afterglow) emission characteristics are industrially synthesized and used for various purposes in the industrial world. I have.

A large space between layers of the clay mineral is used as a matrix, and a rare earth element is used as a guest.
Development of phosphorescent phosphors by a curation reaction has been carried out (Tada Endo: "Development of Newly Functional Materials by Secondary Processing of Layered Materials-Material Design by Intercalation-") Industry, Volume 50, Issue 8, Pages 1086-1
089, 1997).

[0005] The term "phosphorescent phosphor" as used herein is also referred to as a phosphorescent phosphor, a phosphorescent phosphor, a long persistence phosphor, or the like, all of which are synonymous. In the following, the phosphorescent phosphor may be abbreviated as “phosphor”.

[0006] Phosphor is Eu which belongs to oxide-based phosphor.
²⁺ (europium) in strontium aluminate of activated ^{_{(SrAl 2 O 4: Eu 2+}} ) to rare earth ions In the material obtained by adding (Dy ³⁺ (Shisupuroshiumu), Nd ³⁺ (neodymium)), 30mcd / m ² or more high brightness and 2,00
Excellent light emission characteristics with a long afterglow of 0 minutes have been obtained (Tada Endo: "Key technology in the development of phosphorescent and stimulable luminous bodies", synthetic resin, VOL. 43, No. 9, P. 10, 1997).

The phosphor is an industrially manufactured product in the form of a powder (including fine powder), which is added to an object such as a self-luminous display element by means of mixing or the like. Have been. The self-luminous type marking element is typically made of a plastic, such as a plastic film or a plastic hard material, made of a sign, a sign, or a paint.

On the other hand, some phosphors have physical properties that can be easily decomposed or deteriorated, and various proposals have been made for use in sign elements and the like.

In the case of a ZnS: Cu phosphor (a sulfide-based yellow-green phosphor) which is easily decomposed and deteriorated by ultraviolet rays in the presence of moisture to become black, the phosphor is covered with a transparent plastic layer having an ultraviolet absorbing function. Proposals have been made for use (JP-A-60-135246 and JP-A-8-135246).
207194, Japanese Patent Publication No. 2-3704, etc.).

As for the strontium aluminate phosphor (oxide-based blue-green phosphor) which is easily deteriorated by water and moisture, a transparent plastic layer (polyurethane,
A proposal has been made to cover and use in a hermetically sealed state with a layer of polycarbonate or polyacrylic (Japanese Patent Application Laid-Open No. Hei 8 (1996)).
-207194).

It is known that the luminescent properties of phosphors are degraded due to the material and physical properties of the sign element.

For example, when a fluorescent material is mixed in a plastic (polyacryl, polypropylene, polystyrene, etc.) having a high light transmittance in the ultraviolet region, good light emission characteristics are exhibited, whereas the light transmittance in the ultraviolet region is improved. It has been known that when a fluorescent substance is mixed into a plastic having a small particle size (polyethylene, polyacetal, polyurethane, etc.), the luminous characteristics are deteriorated (Tada Endo: "Keys in the development of phosphorescent and stimulable luminous bodies"). Technology ”, synthetic resin, V
OL. 43, NO. 9, page. 10, 1997). For this reason, the plastic mixed with the phosphor is selected to have high light transmittance in the ultraviolet region.

There have been several proposals for the use of phosphors in paints. As for the ZnS: Cu phosphor which is decomposed and degraded by ultraviolet rays, the phosphor powder is mixed with the low-temperature molten glass at a ratio of 30 to 50% by weight by heat melting, and after curing, the pulverized material is mixed into the coating material to apply ultraviolet rays to the glass. And a method in which ZnS: Cu phosphor powder and glass crush are mixed into a coating material to absorb ultraviolet light into glass has been proposed (see JP-A-58-1759).

However, when ultraviolet rays are absorbed by glass and Zn
The method of suppressing the decomposition of the S: Cu phosphor is such that the phosphorescent function cannot be expected to be maintained for a long period of time due to a large degree of wear caused by a passing vehicle or the like due to the material.
It has been pointed out that the thickness is limited to about mm (see Japanese Patent Application Laid-Open No. 8-325577).

[0015] Further, regarding the use of phosphors in paints, road marking paints having durability as a material and having light emission characteristics derived from the phosphors having durability have been proposed (Japanese Patent Laid-Open No. 8-325377). Reference). However, the paint according to the proposal merely uses a polyacryl resin as a main component of the coating film and imparts durability derived from the resin to the coating film.

[0016]

The technical conditions of an industrially useful heat-welding type road marking paint having both a daytime road marking function and a nighttime visible road marking function by self-emission are as follows. Unknown in point.

In particular, almost no technical proposals have been made regarding the technical conditions for realizing a road marking paint having both daytime and nighttime road marking functions by a conventional general road marking construction method (construction machine, construction conditions). The following (i) to (i)
The basic matter represented by v) was unknown. (I) The effect of mixing the phosphor powder on the heat welding type road marking paint (especially, the heat melting property of the paint (fluidity of the hot melt)) was unknown. (Ii) Relationship between light retroreflection characteristics of glass beads and long afterglow visible by phosphor powder in a coating film in which glass beads and phosphor powder coexist (for example, optical properties of glass beads) And the effect of the phosphor powder on the surface were unknown. (Iii) The condition of the phosphor powder that gives high luminance and long afterglow to the coating film for road marking was unknown. (Iv) Regarding the mixing of the phosphor into the glass beads, the mixing conditions were unknown, and the optical characteristics of the glass beads mixed with the phosphor in the road marking film were unknown.

In the present invention, many technical matters including those unknown points have been studied, and the present invention has been found.

The first aspect of the present invention has a road marking characteristic by coloring and a glass bead in the daytime, and has a road marking characteristic that can be visually recognized by self light emission in the nighttime. It is another object of the present invention to provide a self-luminous paint for road marking that has a feature that it can be applied by a conventional general road marking application method.

A second object of the present invention is to provide a self-luminous road marking paint having features such as a more improved road marking function that can be visually recognized by self-light emission at night.

Still another object of the present invention is to provide a glass bead for road marking paint having self-luminous property.

[0022]

Means for Solving the Problems The first invention (claim 1)
The self-luminous road marking paint according to the invention described in (1) contains a phosphor powder having an average particle diameter of 5 to 90 μm and withstanding a temperature of 900 ° C. or more, and a glass bead for the road marking paint. A heat-welding type paint, which provides a road marking that generates self-luminous light that can be visually recognized at night by storing light during the day.

The self-luminous road marking paint according to the second invention (the invention according to claim 2) has an average particle size of 5 to 90.
a phosphorescent phosphor powder having a thickness of 900 μm and capable of withstanding a temperature of 900 ° C. or more; a glass bead for road marking paint containing the phosphorescent phosphor powder; a glass bead containing the phosphorescent phosphor powder; and a glass bead for road marking paint. And a road marking that generates self-luminous light that can be visually recognized at night by storing light during the day.

According to a third aspect of the present invention (a third aspect of the present invention), a self-luminous glass bead for road marking paint has an average particle diameter of 5 to 90 μm and has a light-storing type which can withstand a temperature of 900 ° C. or more. The phosphor powder is mixed in the glass bead molding process and has a refractive index of 1.50 to 1.64.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The first and second inventions are heat-welding type road marking paints having the constitution of the above-mentioned invention, and provide a road marking function at night with self-luminous light. What you get. Hereinafter, the present invention will be described specifically. <First invention> The first invention has an average particle size of 5 to 90%.
Heat welding type road marking paint (JIS K56) containing a phosphor powder having a thickness of 900 μm and a temperature of 900 ° C. or more.
No. 65 as a third type of paint), which allows a road marking film to be used to enable long afterglow road marking by self-emission at night, and a conventional general construction method It can be constructed by:

The heat welding type paints belonging to the three types of JIS K5665 are mainly composed of a color pigment, an extender pigment, and a resin (synthetic resin, natural resin), and have a glass bead of 15-18.
It is contained at a ratio of 15% to 18% by mass (3 types 2) or 25% by mass or more (3 types 3). Several types of glass beads are used, and the center particle size is included in the range of 150 to 480 μm (see glass beads for road marking paints in JISR3301). Industrially, a plurality of types of glass beads having a particle size range of 105 to 850 μm are used.

In the following, the heat-welding type road marking paint belonging to the third class of JIS K5665 may be abbreviated as “heat-welding type paint”.

In the conventional heat-welding type coating material, the raw material is prepared as a powder mixture or individual powder, which is melted in a hot-melting tank with a stirring function of a construction machine and flows out from a nozzle to a road surface or the like. Form road markings. The heat melting temperature at the time of application of the conventional heat welding type paint is about 200 ° C., and when the heat melting temperature becomes about 240 ° C. or more, generally, the entire paint is melted by thermal polymerization of a resin component. The viscosity rises and exceeds the limit melt viscosity that can be applied (see FIG. 1).
Further, when the heat melting temperature is about 250 ° C. or higher, generally, the heat welding type coating material gels and cannot be applied.

On the other hand, the melt viscosity of the hot-melt paint dominate the fluidity of the melt of the hot-melt paint flowing out of the nozzle of the hot-melt tank of the construction machine. It is necessary to be within the range where the construction of the marking is possible. However, the melt viscosity (melt viscosity) of the heat-welding type coating material is such that the melt viscosity of the resin shows a non-Newtonian viscosity that shows complicated behavior due to step stress and the like due to the incorporation of glass beads and fillers. Become.

[0030] For this purpose, the conventional road marking construction method is as follows.
From the raw material composition and the range of the heat melting temperature of the whole raw material composition, the operation range that can be applied is known empirically, and the non-Newtonian property that shows complicated behavior by operating within the known range Road marking can be performed by simple operation from the molten viscous material.

Therefore, it is important at the industrial implementation stage that the newly developed road marking paint can be applied by the conventional application method from the viewpoint of workability (mainly, melt viscosity). become.

[0032] The resin used for the heat welding type paint is as follows.
For example, synthetic resins such as polyamide resins and polyester resins, and rosins and their derivatives, and natural resins such as petroleum resins and terpene resins. Phosphor powder used in the particle size present invention phosphorescent phosphor powder, the first (preferably, 5 to 80 m) average particle diameter of 5~90μm is that it is.

According to the present invention, a hot melt of a heat welding type paint is made to show flow characteristics which can be applied by a similar operation by a conventional application method, and furthermore, an optical mark of a glass bead. In order to maintain the function, the phosphor powder is limited to those having an average particle size of 5 to 90 μm (preferably, 5 to 80 μm).

When the average particle size of the phosphor powder is larger than 90 μm, the function of optically marking road surface of the glass beads may be impaired even if the content of the phosphor powder is small. If it is less than 5 to 90 μm, construction becomes extremely difficult in terms of melt viscosity.

FIG. 1 is a graph showing the relationship between the melt viscosity (hot melt viscosity) and the particle size of the phosphor powder at the time of application of the heat welding type paint, and the vertical axis shows the melt viscosity at the time of application. The horizontal axis indicates the average particle size of the phosphor powder.

If the average particle size of the phosphor powder is reduced by making the average particle size of the phosphor powder smaller while keeping the amount of the phosphor powder added to the coating material the same, if the average particle size becomes smaller than or near 5 μm, heat welding is performed. The melt viscosity of the mold paint exceeds the limit melt viscosity at which it can be applied (the melt viscosity indicated by the horizontal line of the dashed line in FIG. 1), and the application becomes extremely difficult in terms of melt viscosity. Therefore, from FIG. 1, the phosphor powder has an average particle size of about 5
It is desired that the thickness be not less than μm.

The average particle size of the phosphor powder can be determined, for example, by classifying the phosphor powder with a sieve having an opening (mesh) of 90 μm or close to the eye, and a third of the powder passes through the sieve. In this case, the average particle size of the phosphor powder can be 90 μm.

Further, even when the average particle size of the phosphor powder is any other value, it can be easily specified by the same method. The phosphor powder has an average particle size of 5 to 90 μm
(Preferably 5 to 80 μm), a plurality of particle size distributions may be present.

The road marking coating film made of the heat-welding type paint is formed by adding a glass bead, an inorganic filler powder (for example, calcium carbonate powder) and a pigment powder to a continuous phase of a solidified product of a hot melt such as a resin component and a wax component. And the like, in which a glass bead and an inorganic powder are partially exposed on the surface of the coating film (see FIG. 2).

The calcium carbonate used in the heat welding type coating material is heavy calcium carbonate obtained by mechanically pulverizing limestone and has an average particle size of, for example, 15 to 30 μm.

The phosphor powder has an average particle size of, for example, 15 to 3
It has been found in the present invention that, in order to maintain high luminance and long afterglow in the state of coexisting with an inorganic powder of 0 μm, it is desirable to include those having an average particle size of about 20 μm or more. Phosphor powder used in the heat-resistant present invention of the phosphorescent phosphor powder, the second is that it has a heat resistance to withstand temperatures of more than 900 ° C.. 90
The heat resistance to withstand the temperature of 0 ° C. or more, specifically, does not change the decay rate of the afterglow luminance even if the phosphor powder is exposed to the temperature of 900 ° C. or more for a long time, and the form changes. Thermal properties such as no Also, 1,3
A heat resistance up to about 00 ° C. is sufficient for industrial use.

The phosphor powder has high heat resistance (for example,
When it has a heat resistance of 1,000 to 1,300 ° C.), the effects of the present invention can be more easily enjoyed.

The phosphor powder used in the present invention has heat resistance considerably higher than the softening point of soda-lime glass (typically, 720 ° C.). It is a factor of enjoying the effect.

Note that the phosphor powder typically has heat resistance enough to withstand a temperature of 900 ° C. or more, but the phosphor powder having heat resistance of about 400 to 450 ° C. is mixed. Can be

The phosphor powder is added in such an amount that an effective road marking function is produced by long afterglow at night and that the fluidity behavior of the melt of the heat welding type paint is not changed. .

Specifically, the phosphor powder is desirably contained at a ratio of 2.0 to 15.0 parts by weight based on the total weight of the coating film components excluding the phosphor. If the amount is less than 2.0 parts by weight, the afterglow luminance of the road marking film becomes insufficient, and
If it exceeds 5.0 parts by weight, the melt viscosity at the time of application tends to exceed the limit melt viscosity at which the application is possible, and the fluidity behavior of the melt becomes complicated.

As the phosphor powder, existing heat-resistant phosphor powder can be used. For example, the phosphor powder is obtained by adding ions of excited electrons to a crystalline inorganic oxide, and does not have a characteristic emission color. One having an excitation wavelength and an emission wavelength that can be used is used.

As the phosphor powder, those having afterglow of a color tone suitable for the purpose of road marking are typically used.
For example, the excitation wavelength range is 200 to 450 nm,
A material having blue-green emission or yellow emission having a broad peak afterglow wavelength centered at 480 nm is used.

The afterglow of the phosphor powder is typically
It has a bluish color tone such as blue, blue-green or bluish green, or a yellowish color tone such as yellow.

When the phosphor powder has, for example, blue-green afterglow and an average particle size in the range of 8.5 to 9.5,
Those having physical properties of an apparent density of 0.50 to 0.60 g / ml are suitable.

By using a phosphor powder having good water resistance such that the luminance does not change even when immersed in water at 80 ° C. for 100 hours, long road markings at night can be obtained. Light can be maintained for a long time. In the present invention, a phosphor powder that is not decomposed by ultraviolet rays or the like is used.

FIG. 2A is an explanatory view schematically showing a cross section of a coating film of a road surface mark applied by a general application method using the paint of the first present invention. This shows a state in which the glass beads 12 are dispersed in the matrix of the coating film 11 attached. The thickness of the coating film 11 is generally about 1.0 to 3.0 mm (typically, 1.5 m
m).

Since the phosphor powder (not shown) has a particle size of about 1/10 of the glass bead size, a large amount is dispersed between the glass beads and is dispersed at night due to afterglow due to daylight storage. Road marking works effectively.

FIG. 2B is an explanatory view schematically showing the cross section of the coating film of the road marking shown in FIG. 2A after the vehicle has passed for a certain period.

The coating film 11 is peeled off from above by the passage of the vehicle, and the lower layer is sequentially exposed on the surface. But,
The phosphor powder has an average particle size of 5-90 μm and 900
Road surface that has been dispersed in a hot-melt coating of hot-melt paint even under the stirring conditions (eg, shear stress conditions) of a hot-melt tank of a conventional processing machine when it has heat resistance of ℃. Even if the coating film 11 is uniformly dispersed in the thickness direction of the coating film, and the coating film 11 is sequentially peeled off from above by passing through the vehicle, the road marking function at night due to the afterglow derived from the phosphor powder is maintained. <Second invention> The second invention has an average particle diameter of 5 to 90%.
A first aspect of the present invention is that a phosphor powder containing a phosphor powder, which is contained in both a coating material and a glass bead, has a thickness of μm and withstands a temperature of 900 ° C. or more. This is the difference.

The heat-welding type coating material of the second invention has a phosphor powder-containing glass bead dispersed therein, and a phosphor powder-containing glass bead and a normal glass bead containing no phosphor powder. There are those that are dispersed.

The glass powder containing the phosphor powder contains the phosphor powder as long as the optical performance for marking the road surface is maintained. By increasing the amount of the phosphor powder contained in the glass beads and mixing with the glass beads containing no phosphor powder (that is, ordinary glass beads), the entire amount of the glass beads is reduced. As a result, the optical performance for marking the road surface may be increased.

The phosphor powder contained in the glass beads is added in the process of producing the glass beads from the molten glass, and the phosphor powder is dispersed and sealed in the glass beads. It is contained.

When the phosphor powder has an average particle diameter of 5 to 90 μm and has heat resistance to withstand a temperature of 900 ° C. or more, it is dispersed in glass in a melting process and is in an original powder state. Easily contained.

The glass beads containing the phosphor powder have a refractive index in the range of 1.50 to 1.64 in order to maintain the road marking by the retroreflective property of light (the property of returning incident light toward the light source). The amount of the phosphor powder in the range shown is added to the glass beads. When the refractive index of the glass bead containing the phosphor powder is 1.50 to 1.64, high luminance due to the phosphor powder dispersed in the glass bead is obtained due to the retroreflection characteristics of light of the glass bead. The road marking function at night due to afterglow is further improved.

The glass beads containing the phosphor powder are, for example,
The phosphor powder is encapsulated in a ratio of 5 to 15% by weight (based on the weight of the glass beads).

The phosphor powder that can be contained is either a powder having a single average particle diameter or a powder having a plurality of average particle diameters (for example, one having several average particle diameters within a range of 25 to 90 μm). It may be.

The heat welding type paint according to the present invention can be used for road marking by a conventional general construction method, and may be prepared in the form of a powder in which phosphor powder is previously mixed. It is also possible to adopt a method in which the phosphor powder is added to the hot-melting tank, and the hot-melting tank is heated and melted.

There are no particular restrictions on the type of road markings to be constructed according to the present invention, and there are no particular restrictions on the type of road marking, for example, stop lines, pedestrian crossings, prohibition areas, notice marks, and various other road markings. Therefore, various road markings can be made self-luminous so that they can be visually recognized.

In the present invention, modifications or partial alterations and additions are optional, as long as the effects of the present invention are not particularly impaired. It is within the scope of the invention.

Next, the present invention will be described specifically with reference to examples, but the examples are illustrative and do not restrict the present invention.

[0067]

EXAMPLES Example 1 Test Coatings Test coatings were prepared from hot melts of four types of heat welding type coatings, and the afterglow luminance performance was measured. Table 1 shows the raw materials and the parts by weight of the six types of heat welding type paints (specified by the names of trials 1 to 6) for testing.

17 parts by weight of the glass beads in Tests 1 to 6 were as follows:
It shows the total amount of the paint contained in the heat welding type paint and the paint sprayed on the coating surface of the road marking. The phosphorescent phosphor powder of Trial 1 used had an average particle size of 10 μm, the phosphorescent phosphor powder of Trial 2 used had an average particle size of 50 μm, and the phosphorescent phosphor powder of Trial 3 was used. Has a mean particle size of 90 μm, and the phosphorescent phosphor powder of Test 4 has a mean particle size of 1 μm.
0 μm and 25 μm are used in combination, and the phosphorescent phosphor powder of Test 5 has an average particle diameter of 10 μm, 25 m and 50 μm, and the phosphorescent phosphor powder of Test 6 has an average particle diameter of 10 μm.
Both μm and 25 m were used.

In Table 1, the glass beads of Test 6 are the glass beads of Test 1 to Test 5 (trade name: GB153).
T, manufactured by Toshiba Barotini Co., Ltd. (product name: YGB153T (glass line for yellow line)
And Toshiba Barotini Co., Ltd.).

[0070]

[Table 1] Each of the six types of heat-welding coating materials is heated to about 200 ° C. and melted by heating, so that 200 mm (length) × 150 mm
The mixture was poured into a stainless steel dish (width) × 1.5 mm (depth) and cooled and solidified at room temperature to prepare a test coating film.

The test coating film was left in a dark place maintained at about 20 ° C. for 24 hours to completely remove the afterglow to obtain a test coating film without any afterglow.

[0072] miserably light of the test coatings were excited treated with illumination 1000 Lx 20 minutes using a light source consisting of a standard fluorescent lamp D _65.

The excitation-treated test coating film is placed on its flat surface (2
Afterglow luminance was measured at a total of five locations, two each at the center and at both ends in the length direction (00 mm x 150 mm).
The average value was taken as the measured value. The afterglow of the test coating had a bluish green hue.

FIG. 3 shows a state in which the afterglow luminance of the test coating film after the excitation treatment is attenuated. The shaded area in FIG. 3 is the area of the afterglow luminance of the test coating film, and after 12 hours, the lowest afterglow luminance is about 0.3 mcd / m ² , which is visible. Was. <Example 2> Fluidity A heat-melt coating material shown in Table 1 was heated and melted at about 200 ° C to prepare a hot melt for testing, and its fluidity (also workability) was tested.

The workability is as follows. A downsized downsized nozzle of the same size as the nozzle for the hot-melt outflow of the hot-melt type paint, which is attached to a general working machine, is used as a test nozzle. Was spontaneously discharged from the test nozzle.

Further, the test heat welding paint of Table 1 excluding the phosphorescent phosphor powder was used as a comparative heat welding paint, and compared with the hot melt, the paint from the test nozzle was compared. The natural runoff was tested. The heat welding type paint of Table 1 showed the same natural outflow property as the comparative heat welding type paint.

[0077]

According to the first aspect of the present invention, the following effects can be obtained. (1) Road marking can be performed by self-luminous light that can be visually recognized at night (particularly, long afterglow with high luminance). (2) A road marking having a road marking function by self-luminous which can be visually recognized at night can be constructed by a conventional general construction method. (3) Any type and form of road marking can have a self-luminous marking function that can be visually recognized.

According to the second aspect of the present invention, the following effects can be obtained. (A) The road marking function by self-light emission that can be visually recognized at night is further improved. (B) The road marking function by the glass beads is further improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a relationship between a melt viscosity of a heat welding type paint and a particle diameter of a phosphor powder.

FIG. 2 is an explanatory view schematically showing a road marking film.

FIG. 3 is a diagram showing the decay of the afterglow luminance of the test coating film.

[Explanation of symbols]

 10 Road surface 11 Coating film 12 Glass beads

Claims (5)

[Claims] An average particle size of 5 to 90 μm and 900 ° C.
A heat welding type paint containing a phosphorescent phosphor powder and a road marking paint glass bead capable of withstanding the above-mentioned temperatures, and provides a road marking which generates visible light at night by storing light in the daytime. Self-luminous road marking paint. 2. An average particle size of 5 to 90 μm and 900 ° C.
A phosphorescent phosphor powder capable of withstanding the above temperatures, and a glass bead for a road marking paint containing the phosphorescent phosphor powder or a glass bead containing the phosphorescent phosphor powder and a glass bead for a road marking paint are contained. A self-luminous road marking paint that provides a road marking that generates self-luminous light that can be visually recognized at night by storing light during the day. (3) an average particle diameter of 5 to 90 μm and 900 ° C.
A luminous phosphor powder capable of withstanding the above temperature is mixed in the glass bead forming process and has a refractive index of 1.50 to 1.64.
Z. 4. The phosphorescent phosphor powder is present in an amount of 2.0 to 1 part by weight based on the total weight of the heat-welding type paint excluding the phosphorescent phosphor powder.
The self-luminous road marking paint according to claim 1, wherein the paint is contained in a proportion of 5.0 parts by weight. 5. The self-luminous road surface according to claim 1, wherein the phosphorescent phosphor powder has afterglow of a blue or yellow color tone. The self-luminous road marking paint glass bead according to claim 3.