KR20240101979A - Lane painting method by using rainy type retro-reflection paint - Google Patents

Abstract

The present invention relates to a suboptimal painting method of a rain-type retroreflective paint, and more specifically, to a suboptimal painting method of a rain-type retroreflective paint that contains glass beads in the paint to cause retroreflection. It provides a lane with improved durability by minimizing , and has excellent visibility even at night and in rainy weather.

Description

Lane painting method by using rainy type retro-reflection paint}

The present invention relates to a method of painting a lane using a rain-type retroreflective paint, and more specifically, to a method of painting a lane using a rain-type retroreflective paint of optimal composition and composition that causes retroreflection using glass beads in the paint. .

As shown in FIG. 1, glass beads are applied to the surface of a conventional road to cause retroreflection to ensure driver visibility and stability.

When applying lane lines to the surface of a road, glass beads are applied on top of the paint, and when light is emitted from car headlights at night, the light is returned and the light and lanes are visible to the driver.

However, the glass beads applied on top of the paint tend to lose their retroreflective function as they are easily separated by car wheels, and a space is created in the area where the glass bead falls off, allowing foreign substances, dust, etc. to enter the area, leading to suboptimal contamination. It becomes higher.

Conventionally, work equipment equipped with both a lane painting device and a glass bead application device moves slowly on the road and paints the lane, allowing the glass beads to be applied immediately. The glass beads do not fall off easily and are more stably bonded to the paint. We are making it possible.

However, not only is the fact that the glass beads are applied on top of the paint the same, but in rainy weather, the light is diffusely reflected due to aquaplaning, making the lane invisible to the driver and making it difficult for the driver to recognize the lane, resulting in many traffic accidents. In addition, as glass beads break away, they can cause environmental pollution, which is becoming a national problem.

In particular, there are rain lanes aimed at rainy weather, but there is a limitation in that visibility is not secured, and the paint is applied on the road by creating gaps in the paint during construction, which prevents water from escaping from the top of the paint to the bottom during rain. However, it is of no use in weather with heavy rainfall, so the development of retroreflective paint for rainy weather is necessary.

Korean Patent No. 10-1616081 (announcement date April 27, 2016)

In order to solve the problems of the prior art as described above, rather than applying glass beads to the upper surface of the paint, the glass bead component, which is a retroreflective component, is included in the paint to prevent the glass beads from leaving, resulting in excellent long-term life stability. The purpose is to provide a suboptimal painting method for rain-type retroreflective paint.

The technical problems to be solved by the invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

The suboptimal painting method of the rain-type retroreflective paint of the present invention includes the first step of forming an undercoat layer by applying a undercoat resin containing an acrylic-urethane paint; Step 2 of forming a middle layer by applying a first glass bead or a resin containing the first glass bead to the upper surface of the undercoat layer; and step 3 of forming a top coat layer by applying a top coat resin containing a second glass bead and an acrylic-urethane paint to the upper part of the middle coat layer. The process including is performed continuously.

As a means of solving the above problem, the lane painting method of the rain-type retroreflective paint of the present invention has the effect of securing driver visibility by causing retroreflection not only at night but also during rainy weather, thereby reducing the traffic accident rate. In addition, the lane painted by the method of the present invention contains glass beads in the paint to minimize the formation of glass beads on the outermost surface of the lane to increase friction with the outside, thereby minimizing separation and damage to the glass beads. It has the effect of providing lanes with improved durability and long-term life stability, and work efficiency is improved by mixing and applying glass beads within the paint rather than sequentially or melting and mixing the paint and glass beads when constructing lanes.

1 is a diagram showing an existing lane according to the prior art.
Figure 2 is a schematic diagram of the layer structure of a rain-type retroreflective lane painted using the painting method of the present invention.
3A and 3B are schematic diagrams of the layer structure for each rain-type retroreflective lane according to a preferred embodiment of the present invention.
Figure 4 is a schematic diagram of the layer structure for a rain-type retroreflective lane according to a preferred embodiment of the present invention.
Figure 5 is a rough schematic diagram of the retroreflection mechanism of a rain-type retroreflection lane under night and rainy conditions.
Figure 6 is a photograph of a rain-type retroreflective lane painted according to Example 1 measuring visibility according to daytime and nighttime environments.
Figure 7 is a photograph of a rain-type retroreflective lane measuring visibility according to daytime and rainy weather conditions, where A is a photograph of Comparative Example 1 and B is a photograph of Example 1.

Specific details, including the problems to be solved by the present invention, the means for solving the problems, and the effects of the invention, are included in the examples and drawings described below. The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings.

The suboptimal painting method of the rain-type retroreflective paint of the present invention forms a base layer, a middle layer, and a top layer in order. To explain this in more detail, the first step is to form an undercoat layer by applying an undercoat resin; Step 2 of forming a middle layer by applying a first glass bead or a resin containing the first glass bead to the upper surface of the undercoat layer; and a third step of forming a top coat layer by applying a top coat resin containing a second glass bead and an acrylic-urethane paint to the upper part of the middle coat layer. Steps 1 to 3 are performed continuously, A lane having the layer structure shown in the schematic diagram of FIG. 2 can be formed, and a portion of the first glass bead of the middle layer (20) is located in the base layer (10) and the top layer (30).

The explanation of the base resin in step 1 is as follows.

The primer resin includes an acrylic-urethane paint, and the acrylic-urethane paint is a transparent paint or colored paint that serves as a background color, and is preferably a colored paint.

The transparent paint may include an acrylic-urethane resin, a UV blocker, a surface control additive, a curing accelerator, an anti-settling agent, and a solvent, preferably 25 to 45% by weight of the solvent, 0.5 to 2.5% by weight of the UV blocker, and a surface control additive. It may contain 2 to 5% by weight, 0.01 to 0.1% by weight of a curing accelerator, 2 to 8% by weight of an anti-settling agent, and the remaining amount of acrylic-urethane resin.

As the colored paint, white acrylic-urethane paint and/or silver-colored acrylic-urethane paint can be used.

In addition, the white acrylic-urethane paint may contain an acrylic-urethane resin, titanium dioxide, a dispersant, a surface control additive, and an anti-settling agent, preferably 15 to 35% by weight of titanium dioxide, 5 to 14% by weight of the dispersant, 3 to 10% by weight of surface control additive, 3 to 10% by weight of anti-settling agent, and the remaining amount of 100% by weight of acrylic-urethane resin, more preferably 18 to 30% by weight of titanium dioxide, 6 to 12% by weight of dispersant, and surface. It may include 4 to 8% by weight of a control additive, 5 to 8% by weight of an anti-settling agent, and the remaining amount of 100% by weight of acrylic-urethane resin.

In addition, if the titanium dioxide content in 100% by weight of the white acrylic-urethane paint is less than 15% by weight, the hiding power may be lowered and color expression may become difficult, and if it exceeds 35% by weight, the viscosity increases and workability is significantly reduced. There may be.

In addition, the dispersant serves to increase the dispersibility of titanium dioxide and other compositions, and may include one or more selected from stearic acid, butyl stearate, ureic acid, and lauric acid. If the content of the dispersant in the paint is less than 5% by weight, paint components such as titanium dioxide may clump together, which may cause problems with poor coating properties. If the dispersant content exceeds 14% by weight, the cohesion effect of the paint components will decrease and durability will decrease. There may be a problem.

In addition, the surface control additive among the paint components plays a role in improving surface tension and improves the physical properties of the surface of the coating film, and may include one or more selected from silicone type, acrylate type, and reactive type. If the content of the surface control additive in the paint is less than 3% by weight, the effect of weakening the surface tension due to its use may be insufficient, and if it is used in excess of 10% by weight, the problem of weakening the durability of the paint may occur. Therefore, it is recommended to use it within the above range.

In addition, the anti-settling agent among the paint components serves to prevent the paint from flowing down, and may include one or more types selected from complex polyolefin-based compounds and silica-based anti-settling agents. If the content of the anti-settling agent in the paint is less than 3% by weight, there may be a problem that the effect of preventing the sedimentation of the pigment due to its use is insufficient, and if it is used in excess of 10% by weight, the problem of impeding the paint application process may occur. Therefore, it is recommended to use it within the above range.

The white acrylic-urethane paint and/or the silver-based acrylic-urethane paint may be additionally mixed with a viscosity control diluent to control viscosity and increase workability (airless application). The viscosity adjusting diluent may include one or more types selected from surfactants and thinners.

As the primer resin, the silver-colored acrylic-urethane paint may include an acrylic-urethane resin, aluminum paste, a dispersant, a surface control additive, and an anti-settling agent, preferably 10 to 20% by weight of aluminum paste and dispersant 29. It may contain ~ 35% by weight, 3 ~ 10% by weight of surface control additive, 3 ~ 10% by weight of anti-settling agent, and the remaining amount of 100% by weight of urethane resin, more preferably 12 ~ 18% by weight of aluminum paste, and dispersant. It may contain 30 to 34% by weight, 4 to 8% by weight of surface control additive, 5 to 8% by weight of anti-settling agent, and the remaining amount of 100% by weight of urethane resin.

The types and roles of the acrylic-urethane resin, dispersant, surface control additive, and anti-settling agent of the silver-based acrylic-urethane paint are the same as those described for the white-based acrylic-urethane paint.

In addition, if the aluminum paste content is less than 10% by weight in 100% by weight of the silver-based acrylic-urethane paint, the hiding power may be lowered and color expression may become difficult, and if it exceeds 20% by weight, the viscosity becomes too high and application workability is poor. There may be a problem with the coating surface being uneven.

In addition, the silver-based acrylic-urethane paint and/or the silver-based acrylic-urethane paint may be additionally mixed with a viscosity control diluent to control viscosity and increase workability (airless application). The viscosity adjusting diluent may include one or more types selected from surfactants and thinners.

In addition, each of the acrylic-urethane resins used in the transparent, white, and silver-based acrylic-urethane paints is a reaction product of a curing agent and an acrylic polyol-based resin with excellent adhesion, strength, and chemical resistance. In addition, the acrylic polyol-based resin is methyl It may include one or more selected from methacrylate, butyl acrylate, normal butyl methacrylate, butyl methacrylate, cyclohexane methacrylate, methacrylic acid, and ethyl methacrylate.

Additionally, a curing agent containing polyisocyanate as the main ingredient is used and has excellent adhesion, wear resistance, water resistance, and chemical resistance, and does not cause yellowing.

And, the acrylic-urethane resin may be a reaction product of 15 to 25% by weight of the curing agent and the acrylic polyol-based resin.

In addition, the white acrylic-urethane paint and/or the silver-based acrylic-urethane paint described above may further include an ultraviolet ray control agent, and the ultraviolet ray control agent includes at least one selected from trizol type, titanium oxide, and zinc oxide. can do. Also, when using an ultraviolet ray control agent, it is appropriate to use 5 to 10% by weight of the total weight% of the paint components.

In addition, the white and/or silver-based acrylic-urethane paint may further include an additive including an inorganic pigment and/or a matting agent, and the appropriate content of the additive is 10 to 25% by weight of the total weight% of the paint, At this time, if the additive content is less than 10% by weight, color expression may not be sufficiently achieved due to the use of inorganic pigments and/or matting agents, and if it exceeds 25% by weight, the physical properties of the paint may be damaged.

In addition, the undercoat layer of the first stage may be formed to include glass beads, and the undercoat resin is the colored paint and glass beads described above, preferably the remaining amount of 20 to 40% by weight and 100% by weight of the glass beads. It may include the colored paint. At this time, the glass beads used in the undercoating layer may have a refractive index of 1.7 to 2.2 and a particle diameter of 30 to 100 ㎛.

In addition, the undercoat layer in the first step may be formed of a two-layer structure, that is, a first undercoat layer and a second undercoat layer. In this case, the first step is to apply a white acrylic-urethane paint to form the first undercoat layer. Step 1-1 of forming; and steps 1 and 2 of forming a second undercoat layer by applying a silver-based acrylic-urethane paint on top of the first undercoat layer. A two-layer structure undercoat layer may be formed.

In addition, it is preferable to form the base coat layer in the first step by applying the base coat resin to a thickness of about 100 to 400 ㎛. At this time, if the thickness of the undercoating layer is less than 100㎛, there may be a problem that the first glass bead is not buried and easily comes off, and if the undercoating layer thickness exceeds 400㎛, there may be a problem of a decrease in retroreflectance.

Next, the middle layer of step 2 is performed by applying the first glass bead or a resin containing the first glass bead to the upper surface of the undercoat layer of step 1.

At this time, the first glass bead may have a refractive index of 1.5 to 1.9 and a particle diameter of 300 to 800 ㎛, preferably a refractive index of 1.5 to 1.8 and a particle diameter of 350 to 700 ㎛. In this case, the first glass bead may have a refractive index of 1.5. If it is less than 1.9, the retroreflection performance in rainy weather (wet road surfaces) is lowered, and if the refractive index exceeds 1.9, the synergy effect with the glass beads of the top coat layer (which may cause diffuse reflection) can be reduced, thereby reducing visibility. , prices may rise, putting a strain on product supply prices. In addition, if the particle size of the first glass bead is less than 300㎛, there may be a problem that the retroreflection performance is lowered, and if the particle size of the first glass bead exceeds 800㎛, the glass bead may deviate from the lane due to external impact and may fall into the lane. There may be problems with poor durability and long-term stability of retroreflectivity, increased contamination, and decreased retroreflectance of the second glass bead of the top coat.

In addition, the middle layer can be formed by applying only the first glass bead, or a resin mixed with the first glass bead and an acrylic-urethane resin is applied to improve adhesion to the undercoat layer and the top coat layer and fixation stability of the first glass bead. It is also possible to form a middle layer by improving it. In this case, the acrylic-urethane resin can be the same as the acrylic-urethane resin used in the primer resin described above.

In terms of paintability, the acrylic-urethane resin is preferably used in an amount of 40 to 90 parts by weight, preferably 40 to 60 parts by weight, based on 100 parts by weight of the first glass bead.

Next, the top coat layer in step 3 is formed using a top coat resin containing a second glass bead and an acrylic-urethane paint.

The second glass bead is used to increase the retroreflectance by interacting with the first glass bead of the middle layer. The second glass bead used in the top coat resin has a refractive index of 1.7 ~ 2.2 and a particle diameter of 30 ~ 100㎛. , preferably with a refractive index of 2.0 to 2.2 and a particle diameter of 60 to 80 ㎛. At this time, if the refractive index of the second glass bead is less than 1.7, the retroreflection performance is lowered, and if the refractive index is more than 2.2, the refraction may be severe and the driver's visibility may be lowered or the transparency of the bead may be lowered.

If the particle diameter of the second glass bead is less than 30㎛, it is laid under the paint when applied, lowering the retroreflective performance. If it exceeds 100㎛, it becomes higher than the paint film thickness, and there is a risk of separation or it is heavy, so settling can easily occur.

In addition, the top coat resin may include the remaining amount of acrylic-urethane paint in 30 to 40% by weight and 100% by weight of the second glass bead, preferably in 32 to 38% by weight and 100% by weight of the second glass bead. The remaining amount of acrylic-urethane paint may be included. At this time, if the second glass bead is mixed at less than 30% by weight, the retroreflective performance may be reduced, and if it is more than 40% by weight, the application workability and paintability may be reduced, and the second glass bead is mixed at 30 ~ 30% by weight. When mixed at 40% by weight, it can be applied most evenly. If the paint peels off from an external stimulus in the future, it prevents the beads from coming off or prevents contamination of the area where they come off because it is not just the beads that come off. It can be supplemented.

Additionally, the acrylic-urethane paint used in the top coat resin may include a transparent acrylic-urethane paint or a colored acrylic-urethane paint.

The transparent acrylic-urethane paint may be the same as the transparent paint described in the primer resin.

The colored acrylic-urethane paint can be manufactured and used by adjusting the type and content of the pigment according to the desired color, and the colored acrylic-urethane paint can be white, silver, red, or blue. , it may be a green, yellow, pink or orange colored acrylic-urethane paint.

As the top coat resin, the composition and composition ratio of the white acrylic-urethane paint and/or the silver-based acrylic-urethane paint are the same as those described for the undercoat resin.

In addition, in the suboptimal painting method of the present invention, it is preferable to apply airless paint in each of steps 1 to 3, and to improve durability and excellent retroreflective performance, secondary application of each layer is performed. It can also be done.

Lanes painted with the rain-type retroreflective paint and method described above have good adhesion to asphalt and concrete, and have excellent physical properties such as durability, weather resistance, and contamination resistance.

For example, as a preferred embodiment of a lane painted by the painting method of the present invention, as shown in Figure 3A, it may have a structure in which a colored undercoat layer, a middle coat layer, and a transparent top coat layer are stacked. At this time, the colored undercoat layer 13 may be formed of the undercoat resin of the white acrylic-urethane paint or the silver-based acrylic-urethane paint described above.

In addition, the intermediate layer 20 may be composed of first glass beads or may be formed of a resin mixed with the first glass beads and an acrylic-urethane resin.

The top coat layer 31 may be formed of the transparent acrylic-urethane paint described above.

And, as another preferred embodiment of the suboptimal material painted by the painting method of the present invention, as shown in B of FIG. 3, the top coat layer is not the transparent acrylic-urethane paint, but the second glass bead and colored acrylic-urethane paint described above. It can be formed of a top coat resin containing urethane paint, and specifically, a white, silver, red, blue, green, yellow, pink, or orange top coat layer can be formed.

In addition, as another preferred embodiment of the suboptimal line painted by the painting method of the present invention, as shown in FIG. 3C, the undercoat layer 15 may be formed using a undercoat resin containing glass beads.

In addition, as another preferred embodiment of the suboptimal paint painted by the painting method of the present invention, as schematically shown in FIG. 4, the undercoat layer 10 is prepared using the white acrylic-urethane paint and the silver-based acrylic-urethane paint described above. Using paint, it can also be formed into a two-layer structure of a white undercoat layer 17 and a silver undercoat layer 19.

By applying colors and specific glass beads to each layer in this way, unlike existing lanes, excellent retroreflection can be created not only at night but also in rainy weather to ensure driver visibility (see Figure 5).

Hereinafter, the present invention will be described in more detail through examples. However, the following examples are intended to aid understanding of the present invention, and should not be construed as limiting the scope of the present invention.

[Example]

Preparation Example 1: Preparation of white acrylic-urethane paint

As a reaction product of 23.4% by weight of a curing agent of acrylic-urethane resin and the remaining amount of acrylic polyol, polyisocyanate was used as the curing agent, and normal butyl methacrylate was used as the acrylic polyol. Then, titanium dioxide (particle diameter 10-50㎛) was prepared.

In addition, stearic acid was prepared as a dispersant, a silicone-based type additive was prepared as a surface control additive, and a composite polyol-based composite was prepared as an anti-settling agent.

Next, 25% by weight of the titanium dioxide, 10% by weight of the dispersant, 5% by weight of the surface control additive, 5% by weight of the anti-settling agent, and the remaining amount of the acrylic-urethane resin of 100% by weight are mixed and stirred to produce a white system. Acrylic-urethane paint was prepared.

Preparation Example 2: Preparation of silver-based acrylic-urethane paint

As a reaction product of 23.4% by weight of a curing agent of acrylic-urethane resin and the remaining amount of acrylic polyol, polyisocyanate was used as the curing agent, and normal butyl methacrylate was used as the acrylic polyol. Then, an aluminum paste (particle diameter of 5 to 35 μm) was prepared.

In addition, stearic acid was prepared as a dispersant, a silicone-type additive was prepared as a surface control additive, and a composite polyolefin-based composite was prepared as an anti-settling agent.

Next, 15% by weight of the aluminum paste, 30% by weight of the dispersant, 7% by weight of the surface control additive, 5% by weight of the anti-settling agent, and the remaining amount of the acrylic-urethane resin of 100% by weight were mixed and stirred to form a silver-based acrylic-urethane. Paint was prepared.

Preparation Example 3: Preparation of transparent acrylic-urethane paint

As a reaction product of 23.4% by weight of a curing agent of acrylic-urethane resin and the remaining amount of acrylic polyol, polyisocyanate was used as the curing agent, and normal butyl methacrylate was used as the acrylic polyol.

A silicone-type additive was prepared as a surface control additive, and a composite polyolefin-based composite was prepared as an anti-settling agent.

As the transparent paint, 38.5% by weight of solvent, 1.5% by weight of sunscreen, 3.7% by weight of surface control additive, 0.05% by weight of curing accelerator, 5.3% by weight of anti-settling agent, and the remaining amount of 100% by weight of the acrylic-urethane resin are mixed. , and stirring to prepare a silver-based acrylic-urethane paint.

Example 1: Lane painting construction

Asphalt test specimens for painting lanes were prepared.

The white acrylic-urethane paint of Preparation Example 1 was prepared as a primer resin.

As the first glass bead applied to the middle layer, glass beads with a refractive index of 1.6 to 1.8 and a particle diameter of 400 to 650 μm were prepared.

As a top coat resin, it was prepared by mixing 35% by weight of glass beads (second glass beads) with a refractive index of 2.0 to 2.2 and a particle diameter of 60 to 80 ㎛ and the transparent acrylic-urethane resin of Preparation Example 3.

After performing airless application of the base resin on the upper part of the asphalt test specimen, continuously airless application of the first glass bead, and then applying the top coat resin on the upper part of the applied first glass bead, then air drying A lane consisting of a white undercoat layer, a middle coat layer, and a transparent top coat layer was painted.

Example 2: Lane painting construction

The silver-based acrylic-urethane paint of Preparation Example 2 was prepared as a primer resin.

In the same manner as in Example 1, the base resin, first glass bead, and top coat resin were airless applied to paint a lane composed of a silver base coat, a middle coat, and a transparent top coat.

Example 3: Lane painting construction

As a top coat resin, it was prepared by mixing 35% by weight of glass beads (second glass beads) with a refractive index of 2.0 to 2.2 and a particle diameter of 60 to 80 ㎛ and the silver-based acrylic-urethane resin of Preparation Example 2.

In the same manner as in Example 1, the base resin, the first glass bead, and the top coat resin were airless applied to paint a lane composed of a white base coat, a middle coat layer, and a silver top coat layer.

Example 4: Lane painting construction

The silver-based acrylic-urethane paint of Preparation Example 2 was prepared as a primer resin.

As a top coat resin, it was prepared by mixing 35% by weight of glass beads (second glass beads) with a refractive index of 2.0 to 2.2 and a particle diameter of 60 to 80 ㎛ and the white acrylic-urethane resin of Preparation Example 1.

In the same manner as in Example 1, the base resin, first glass bead, and top coat resin were airless applied to paint a lane composed of a silver base coat, a middle coat, and a white top coat.

Example 5: Lane painting construction

As the first base resin, the white acrylic-urethane paint of Preparation Example 1 was prepared.

As a second base resin, the silver-based acrylic-urethane paint of Preparation Example 2 was prepared.

As a top coat resin, it was prepared by mixing 35% by weight of glass beads (second glass beads) with a refractive index of 2.0 to 2.2 and a particle diameter of 60 to 80 ㎛ and the white acrylic-urethane resin of Preparation Example 1.

After performing airless application of the base resin on the top of the asphalt test specimen, continuously airless application of the first glass bead, and then applying the top coat resin on the top of the applied first glass bead, then air drying. A lane consisting of a white undercoat layer, a middle coat layer, and a transparent top coat layer was painted.

In the same manner as in Example 1, the first base resin, the second base resin, the first glass bead, and the top coat resin were airless applied to form a lane consisting of a white first base coat, a silver second base coat, a middle coat, and a white top coat. was painted and constructed.

Comparative Example 1: Existing lane painting construction

The existing room-temperature drying type lane painting was constructed using rain-type glass beads used in existing lanes.

division sublayer middle class top layer Example 1 White (thickness 350㎛) 1st glass bead (thickness 100㎛) Transparent (thickness 100㎛) Example 2 Silver (thickness 350㎛) 1st glass bead (thickness 100㎛) Transparent (thickness 100㎛) Example 3 White (thickness 400㎛) 1st glass bead (thickness 100㎛) Silver (thickness 100㎛) Example 4 Silver (thickness 400㎛) 1st glass bead (thickness 100㎛) White (thickness 100㎛) Example 5 1st undercoat layer - white
(Thickness 200㎛)
2nd undercoat layer - silver
(Thickness 200㎛) 1st glass bead (thickness 100㎛) White (thickness 100㎛)

Experimental Example 1: Visibility measurement experiment

The visibility of lanes painted on asphalt test specimens was measured using the paints of Example 5 and Comparative Example 1, and the results are shown in Figures 6 and 7.

Figure 6 is a photo of the visibility measurement of the lane painted in Example 5, and it was confirmed that visibility was good in both day and night situations.

In addition, in Figure 7, A is a photo of Comparative Example 1 and B is a visibility measurement photo of Example 5, and it was confirmed that Example 5 showed excellent visibility not only during the day but also under rainy conditions. On the other hand, Comparative Example 1 showed relatively poor visibility compared to Example 5.

As such, a person skilled in the art will understand that the technical configuration of the present invention described above can be implemented in other specific forms without changing the technical idea or essential features of the present invention.

Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the claims described later rather than the detailed description above, and the meaning and scope of the claims and their All changes or modified forms derived from the equivalent concept should be construed as falling within the scope of the present invention.

10: Undercoat layer 13: Colored undercoat layer
15: Undercoat layer containing glass beads 17: First undercoat layer
19: second undercoat layer 20: middle layer
30: top coat layer 31: transparent top coat layer
33: colored top coat

Claims (5)

Step 1 of forming an undercoat layer by applying an undercoat resin containing an acrylic-urethane paint;
Step 2 of forming a middle layer by applying a first glass bead or a resin containing the first glass bead to the upper surface of the undercoat layer; and
Performing a process including the third step of forming a top coat layer by applying a top coat resin containing a second glass bead and an acrylic-urethane paint to the upper part of the middle coat layer,
Steps 1 to 3 are processes performed continuously,
Some of the first glass beads of the middle layer are located in the lower and upper layers,
The acrylic-urethane paint of the primer resin is a transparent acrylic-urethane paint; Or a white or silver colored acrylic-urethane paint;
The acrylic-urethane paint of the top coat resin is a transparent acrylic-urethane paint; Or a colored acrylic-urethane paint of white, silver, red, blue, green, yellow, pink or orange.
The method of claim 1, wherein the first glass bead has a refractive index of 1.5 to 1.9 and a particle diameter of 300 to 800㎛,
The second glass bead is a suboptimal painting method of a rain-type retroreflective paint, characterized in that the refractive index is 1.7 ~ 2.2 and the particle diameter is 30 ~ 100㎛.
The suboptimal painting method of a rain-type retroreflective paint according to claim 1, wherein the top coat resin includes 30 to 40% by weight of the second glass bead and the remaining amount of 100% by weight of the acrylic-urethane paint.
The method of claim 1, wherein each of the urethane resins of the base coat resin and the top coat resin is independent,
The white colored acrylic-urethane paint of each of the base coat resin and the top coat resin includes an acrylic-urethane resin, titanium dioxide, a dispersant, a surface control additive, and an anti-settling agent,
The silver-colored acrylic-urethane paint of each of the base coat resin and the top coat resin includes an acrylic-urethane resin, an aluminum paste, a dispersant, a surface control additive, and an anti-settling agent,
The transparent acrylic-urethane paint of each of the base coat resin and the top coat resin includes an acrylic-urethane resin, an ultraviolet ray blocker, a surface control additive, a curing accelerator, an anti-settling agent, and a solvent.
Acrylic-urethane resins of colored acrylic-urethane paints, silver-based acrylic-urethane paints, and transparent acrylic-urethane paints are each a reaction product of a hardener and an acrylic polyol-based resin.
A suboptimal painting method for a rain-type retroreflective paint, characterized in that the curing agent contains polyisocyanate.
The method of claim 4, wherein the white colored acrylic-urethane paint contains 15 to 35% by weight of titanium dioxide, 5 to 14% by weight of a dispersant, 3 to 10% by weight of a surface control additive, 3 to 10% by weight of an anti-settling agent, and 100% by weight. Contains the remaining amount of acrylic-urethane resin,
The silver colored acrylic-urethane paint contains 10 to 20% by weight of aluminum paste, 29 to 35% by weight of dispersant, 3 to 10% by weight of surface control additive, 3 to 10% by weight of anti-settling agent, and the remaining amount of acrylic-urethane paint of 100% by weight. Contains urethane resin,
The transparent acrylic-urethane paint contains 25 to 45% by weight of a solvent, 0.5 to 2.5% by weight of a sunscreen, 2 to 5% by weight of a surface control additive, 0.01 to 0.1% by weight of a curing accelerator, and 2 to 2% by weight of an anti-settling agent. A suboptimal painting method of a rain-type retroreflective paint comprising 8% by weight and the remaining amount of acrylic-urethane resin.