KR102182007B1 - Thermo-sensing paint composition for road surface temperature marking and construction method of road surface temperature marking line using the same composition - Google Patents

Abstract

The present invention includes acrylic modified urethane water dispersion resin, acrylic modified fluorine resin, latent heat storage material (2) whose surface is encapsulated with acrylic resin, hollow aluminum silicate structure (1), hydrazine, isophorone diamine, water-soluble solvent and water The subject and; It relates to a thermochromic coating composition for road surface temperature display including an isocyanate resin, a zion pigment (3), an acrylate monomer, and a curing agent containing water, and a method of constructing a road surface temperature display line using the same.
Accordingly, the present invention can accurately and clearly inform road users of the possibility of freezing of the road surface of a road or bridge section without a separate external power source by accurately expressing the freezing state of the road surface, from which the road driver can inform the road or bridge section By accurately grasping the possibility of freezing on the road surface, it is possible not only to prevent the risk of accidents, but also to provide a thermochromic paint composition for road surface temperature display with excellent heat resistance and durability, and a construction method of road surface temperature indicators using the same. have.

Description

Thermo-sensing paint composition for road surface temperature marking and construction method of road surface temperature marking line using the same composition}

In the present invention, by accurately expressing the freezing state of the road surface, it is possible to inform road users of the possibility of freezing of the road surface of a road or bridge section without a separate external power source, from which the road driver can accurately determine the possibility of freezing of the road surface of the road or bridge section. By grasping, it relates to a thermochromic paint composition for road surface temperature display that can prevent the risk of an accident, and a construction method of a road surface temperature display line using the same.

In general, the main cause of traffic accidents due to vehicle slippage occurring on the road surface in winter is freezing (freezing). In particular, the road surface of the bridge section is exposed to outside air compared to the road surface of a road with geothermal heat, so the road surface is highly likely to freeze. More specifically, the road surface of the bridge section is exposed to the outside air, so if the temperature is lower than the freezing point, the possibility of freezing the road surface increases, and the risk of an accident further increases. In particular, when the driver's visibility is lowered and it is difficult to visually identify whether it is freezing or not, in the case of thin road icing, so-called black ice, the driver is simply mistaken for a wet road surface or shade, which increases the risk of an accident. I can.

In order to inform drivers of the possibility of freezing, the Road Management Administration has installed safety signs at the entrance section of the bridge. However, since these safety signs are installed at all times, it is difficult to attract the attention of the driver, and since they require constant attention regardless of the current road surface conditions, they are not very helpful in safe driving.

As a prior art for solving the above-described problem, Japanese Patent Laid-Open No. 1996-22259 discloses an invention entitled “road sign”, a road that can easily and quickly display dangerous road conditions caused by outside air. In addition, Japanese Patent Laid-Open No. 2003-193440 discloses an invention entitled "Road Marking Hole". The condition is a temperature that can be displayed simply for alerting drivers such as road surface freezing. It relates to a road marking hole that automatically changes color. In addition, as another prior art, Korean Patent Application Publication No. 2015-81585 discloses an invention entitled “Paint composition for indicating the presence or absence of freezing of the ground”.

However, according to the prior art, there is a problem in that a separate external power source must be used in order to inform road users of road conditions such as freezing of roads or bridge sections. In addition, when the coating composition for indicating the presence or absence of freezing on the ground is coated over a large area, stains may occur in the temperature display color or black ice easily occurs on the painted coating layer because the temperatures are all different according to the painted location. There was a problem that could not be confirmed because the temperature display color was covered.

An embodiment of the present invention is to provide a thermochromic coating composition for a road surface temperature display that can clearly and neatly inform road users of the possibility of freezing of a road surface of a road or bridge section without a separate external power source.

In addition, another example of the present invention is to provide a method of constructing a road surface temperature display line using a thermochromic paint composition for displaying a road surface temperature according to an embodiment of the present invention.

One embodiment of the present invention is an acrylic modified urethane water dispersion resin, an acrylic modified fluorine resin, a latent heat storage material (2) whose surface is encapsulated with an acrylic resin, a hollow aluminum silicate structure (1), hydrazine, isophorone diamine, a water-soluble solvent And a subject including water; An isocyanate resin, a zion pigment (3), an acrylate monomer, and a curing agent containing water; The subject and the curing agent are mixed in a weight ratio of 6 to 10: 1 to provide a thermochromic coating composition for road surface temperature display.

The main subject comprises the steps of preparing a dispersion by mixing 100 parts by weight of water and 50 to 70 parts by weight of the latent heat storage material (2) encapsulated with an acrylic resin on the surface; By mixing and stirring 5 to 20 parts by weight of the hollow aluminum silicate structure (1) in 100 parts by weight of the dispersion, the latent heat storage material (2) whose surface is encapsulated with acrylic resin is penetrated into the hollow aluminum silicate structure (1). Preparing a mixture; And 80 to 120 parts by weight of an acrylic-modified fluorine resin, based on 100 parts by weight of an acrylic-modified urethane water-dispersion resin, and a latent heat storage material (2) whose surface is encapsulated with an acrylic resin in the hollow aluminum silicate structure (1) is penetrated. It is prepared by a manufacturing method comprising mixing 50 to 80 parts by weight of a mixture, 0.1 to 5 parts by weight of hydrazine, 0.1 to 5 parts by weight of isophorone diamine, 30 to 70 parts by weight of a water-soluble solvent, and 1 to 30 parts by weight of water. Can,

The curing agent may include 70 to 150 parts by weight of Zion pigment (3), 50 to 100 parts by weight of acrylate monomer, and 50 to 150 parts by weight of water, based on 100 parts by weight of the isocyanate resin,

The subject and the curing agent may be mixed in a weight ratio of 6 to 10: 1 and then coated on the road surface, followed by heat treatment at a temperature of 70 to 90 °C for 20 to 40 minutes.

The hollow aluminum silicate structure (1) contains an acrylic component (11) and a latent heat storage material (2) inside, and a urethane component and a fluorine component (12), and a Zion pigment (3) on the outside. , The internal acrylic component 11, the external urethane component 12, and the fluorine component 13 may be cross-linked with each other, thereby being firmly fixed between the resins.

The hollow aluminum silicate structure (1) comprises the steps of preparing a mixture by mixing and stirring a silica precursor, an alumina precursor, a surfactant, and an acid; Heat-treating the mixture; And firing the heat-treated mixture; may be prepared by a manufacturing method comprising.

The latent heat storage material (2) whose surface is encapsulated with an acrylic resin is emulsified by mixing with an acrylic monomer compound, a surfactant, and water, and a polymerization initiator is added to the emulsified mixture to make a polymerization reaction so that the surface becomes an acrylic resin (21). It may be encapsulated.

Another embodiment of the present invention comprises the steps of removing contaminants such as dust and moisture from the road surface; Spray-coating a white primer composition on the road surface, and then drying at a temperature of 20 to 25° C. for 1 to 5 hours to form a white primer layer; And forming a road surface temperature display layer having a thickness of 1 to 5 mm on the white primer layer by spray painting and drying the thermochromic coating composition for road surface temperature display according to an embodiment of the present invention. It provides a construction method of the road surface temperature display line including.

According to the thermochromic paint composition for marking the road surface temperature according to an embodiment of the present invention and the construction method of the road surface temperature display line using the same, by accurately expressing the freezing state of the road surface, the road surface of the road or bridge section without a separate external power source The possibility of freezing can be notified to road users, from which the road driver can accurately grasp the possibility of freezing on the road surface of a road or bridge section, thereby preventing the risk of an accident.

In addition, since the thermochromic paint composition for road surface temperature display according to an embodiment of the present invention has a uniform temperature distribution even in a wide area, it is possible to clearly and neatly display the freezing state of the road surface without spots due to temperature differences. There is.

In addition, when there is a possibility of freezing on the road surface, since the thermochromic paint composition for marking the road surface temperature according to an embodiment of the present invention can maintain a temperature relatively higher than the temperature of the surrounding road surface, it slows the freezing of the road surface itself, There is an effect of preventing the formation of black ice on the road surface temperature display layer. Thereby, there is an effect of being able to display the freezing state of the road surface more clearly and neatly.

The thermochromic paint composition for road surface temperature display according to an embodiment of the present invention has an effect of providing a road surface temperature display layer having excellent heat resistance and durability.

1 is a schematic diagram of a hollow aluminum silicate structure present in a thermochromic coating composition for displaying a road surface temperature according to an embodiment of the present invention.
2 is an image showing that the color of the road surface temperature display line constructed according to the construction method according to an embodiment of the present invention changes according to a change in external temperature.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later.

One embodiment of the present invention is an acrylic modified urethane water dispersion resin, an acrylic modified fluorine resin, a latent heat storage material (2) whose surface is encapsulated with an acrylic resin, a hollow aluminum silicate structure (1), hydrazine, isophorone diamine, a water-soluble solvent And a subject including water; An isocyanate resin, a zion pigment (3), an acrylate monomer, and a curing agent containing water; The subject and the curing agent are mixed in a weight ratio of 6 to 10: 1 to provide a thermochromic coating composition for road surface temperature display.

The thermochromic coating composition for the display of the road surface temperature according to the embodiment of the present invention includes a hollow aluminum silicate structure and a latent heat storage material, so that temperature resistance according to a change in ambient temperature is remarkably improved. In particular, when there is a possibility of freezing on the road surface, since the thermochromic paint composition for the road surface temperature display according to an embodiment of the present invention contains latent heat, it is possible to maintain a temperature relatively higher than the temperature of the surrounding road surface. It is possible to slow the freezing itself of the road surface to which the thermochromic paint composition is applied for the road surface temperature display according to an embodiment of the present invention, and there is an effect of preventing the formation of black ice on the road surface temperature display layer.

In addition, since it has a very uniform temperature distribution even in a wide area, there is an effect of drastically reducing unevenness caused by temperature differences in a wide area. Accordingly, there is an effect of being able to display the freezing state of the road surface more clearly and neatly without spots.

In addition, since the hollow aluminum silicate structure and the latent heat storage material encapsulated with acrylic resin on the surface are very firmly bonded between the resins, there is an effect of providing a road surface temperature display layer having excellent heat resistance and durability.

The main material and the curing agent include the above-described constituents, and the content and manufacturing method are not particularly limited.

However, preparing a dispersion by mixing 100 parts by weight of water and 50 to 70 parts by weight of the latent heat storage material (2) encapsulated with an acrylic resin; By mixing and stirring 5 to 20 parts by weight of the hollow aluminum silicate structure (1) in 100 parts by weight of the dispersion, the latent heat storage material (2) whose surface is encapsulated with acrylic resin is penetrated into the hollow aluminum silicate structure (1). Preparing a mixture; And 80 to 120 parts by weight of acrylic-modified fluorine resin, based on 100 parts by weight of acrylic-modified urethane water-dispersion resin, and a latent heat storage material (2) whose surface is encapsulated with acrylic resin inside the prepared hollow aluminum silicate structure (1) penetrates. 50 to 80 parts by weight of the mixture, 0.1 to 5 parts by weight of hydrazine, 0.1 to 5 parts by weight of isophorone diamine, 30 to 70 parts by weight of a water-soluble solvent and 1 to 30 parts by weight of water are mixed, and 0.5 to 30 parts by weight at a temperature of 60 to 80°C. It can be prepared by a manufacturing method including the step of heat treatment for 1 hour.

In addition, the curing agent may include 70 to 150 parts by weight of Zion pigment 3, 50 to 100 parts by weight of acrylate monomer, and 50 to 150 parts by weight of water, based on 100 parts by weight of the isocyanate resin.

In addition, the subject and the curing agent may be prepared by mixing in a weight ratio of 6 to 10: 1 and then painting on the road surface and then heat treatment at a temperature of 70 to 90° C. for 20 to 40 minutes.

Accordingly, the hollow aluminum silicate structure (1) present in the thermochromic coating composition for road surface temperature display according to an embodiment of the present invention contains an acrylic component 11 and a latent heat storage material 2 therein, , Urethane component and fluorine component (12) and Zion pigment (3) are included on the outside, and the acrylic component (11) of the inside, and the urethane component (12) and fluorine component (13) of the outside are crosslinked with each other As a result, it can be prepared so as to be firmly fixed between the resins. In addition, the above-described effect can be further improved. A schematic diagram of a hollow aluminum silicate structure present in a thermochromic coating composition for displaying a road surface temperature according to an embodiment of the present invention is as shown in FIG. 1.

The hollow aluminum silicate structure (1) may be used having a porous hollow structure having an average particle diameter of 500 to 1500 nm, the surface of the latent heat storage material (2) encapsulated with acrylic resin is 10 to 100 nm What has an average particle diameter can be used. Thereby, the effect of the present invention described above can be further improved.

In the resin according to an embodiment of the present invention, an acrylic-modified urethane aqueous dispersion resin and an acrylic-modified fluorine resin are added, respectively, wherein the mixed resin is a thermochromic paint for miscibility with other components and a final road surface temperature display. In consideration of the durability of the composition, it is recommended to use a mixture in a weight ratio of 1: 1.

The hollow aluminum silicate structure (1) comprises the steps of preparing a mixture by mixing and stirring a silica precursor, an alumina precursor, a surfactant, and an acid; Heat-treating the mixture at a temperature range of 333 to 373K; And firing the heat-treated mixture in a temperature range of 373 to 1273 K and in an acidic gas atmosphere such as oxygen (O ₂ ) and carbon dioxide (CO ₂ ). It can be improved. In addition, it is possible to very easily support the latent heat storage material 2 whose surface is encapsulated with an acrylic resin.

In this case, the silica precursor may be one or more selected from the group consisting of colloidal silica, tetraethylorthosilicate, fumed silica, sodium silicate, and mixtures thereof, but is not limited thereto.

In addition, the alumina precursor may use a variety of known materials, but aluminum nitrate (Al(NO ₃ ) ₃ ), aluminum phosphate (AlPO ₄ ), aluminum isopropoxide (Al(OCH(CH ₃ ) ₂ ) ₃ ) And one or more selected from the group consisting of mixtures thereof, but is not limited thereto.

In addition, as the surfactant, various known surfactants may be used, and preferably, an alkyl chain having 20 to 50 carbon atoms may be included. In addition, as the acid, various known acids may be used, but it is preferable to use a weak acid, and more preferably, an acetic acid is used.

The latent heat storage material (2) whose surface is encapsulated with an acrylic resin is emulsified by mixing with an acrylic monomer compound, a surfactant, and water, and a polymerization initiator is added to the emulsified mixture to make a polymerization reaction so that the surface becomes an acrylic resin (21). It may be encapsulated. As a result, the hollow aluminum silicate structure 1 is easily penetrated and is very firmly bonded between the resins, so that the durability of the thermochromic coating composition for displaying the road surface temperature can be remarkably improved.

More specifically, an aqueous solution in which 15 to 30 parts by weight of a surfactant is dissolved is maintained at 60 to 90°C based on 100 parts by weight of water. Then, based on 100 parts by weight of the water, 3 to 50 parts by weight of a latent heat storage material and 10 to 40 parts by weight of an acrylic monomer compound are added to emulsify, and 0.005 to 5 parts by weight of a polymerization initiator is added to the emulsified mixture to perform polymerization reaction. By encapsulating the latent heat storage material, the above effect can be further improved.

Here, the polymerization time varies depending on the amount of the acrylic monomer compound used, the polymerization temperature, and the amount of polymerization initiator, but preferably, the polymerization time is adjusted so that the polymerization rate is in the range of 7 to 20%, and then, When a thermochromic paint composition for road surface temperature display is applied and heat-treated, it is possible to further improve the effect of the present invention at all times by mixing with other resin components to perform additional polymerization.

As the latent heat storage material according to an embodiment of the present invention, any material may be used as long as it has high latent heat and good thermal/mechanical properties, but preferably an organic compound-based material is used, and particularly preferably Is preferably used alone or in combination of two or more of a paraffinic saturated hydrocarbon having 10 to 36 carbon atoms, polyethylene glycol, and an organic compound oil or wax having a melting point in the range of -30 to 80°C. Here, as the latent heat storage material, it is possible to use a pure single material alone, but when using a pure single material, a phase change occurs in a narrow temperature range, so two or more kinds of the latent heat storage material are more preferably two to three kinds. By mixing the mixture to form a eutectic mixture or by controlling the degree of hydration, it is possible to prepare a latent heat storage material capable of a phase change accompanied by a high amount of heat in and out over a wide temperature range.

The acrylic monomer compound is a material that forms a resin layer by encapsulating the latent heat storage material, and any monomer containing an acrylic group, for example, an acrylic monomer compound, may be used, but preferably, methacrylic acid ) It is preferable to use a compound containing 0 to 80% by weight, 20 to 100% by weight of esterified acrylic acid, and 0 to 30% by weight of an ethylenically unsaturated monomer. The amount used may be 10 to 40 parts by weight based on 100 parts by weight of the latent heat storage material. Here, as the material that can be used as the unsaturated ethylene monomer, styrene, vinyl acetate or ethylnene glycol dimethacrylate, divinyl benzene, butanediol dimethacrylate ( butanediol dimethacrylate) or the like may be used.

In addition, the surfactant is for forming a latent heat storage material into microparticles, and any surfactant commonly used in the art may be used, but preferably polyvinyl alcohol, sodium lauryl sulfate (SLS), Use alone or in combination with hydroxyethylcellulose, etc., or polyethylene sorbitan monooleate, polyethylene sorbitan monostearate, polyethylene sorbitan monopalmitate, and Polyoxyethylene sorbitan monolaurate, etc. were used as sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate and sorbitan monolaurate. sorbitan monooleate) may be used, and the particle size of the latent heat storage material is determined according to the amount used, but the preferred amount may be 15 to 30 parts by weight based on 100 parts by weight of water.

In addition, the polymerization initiator is a material for initiating a polymerization reaction, and any polymerization initiator commonly used in the art may be used, but preferably sodium sulfite or sulfur dioxide ), or ammonium persulphate (ammonium persulphate), etc. may be used, and the amount thereof may be 0.005 to 5 parts by weight based on 100 parts by weight of water.

The water-soluble solvent used in one embodiment of the present invention is ethyl cellosolve, butyl cellosolve, methyl carbitol, ethyl carbitol, butyl carbitol, ethyl alcohol, methyl alcohol, butyl alcohol, isobutyl alcohol, and mixtures thereof. One or more selected from the group consisting of may be used. More specifically, the effect of the present invention can be further improved by using a mixture of ethylcellulose, methylcarbitol, and butyl alcohol in a volume ratio of 1:1:1.

The isocyanate resin used in one embodiment of the present invention is generally used in the art, and its kind is not particularly limited, but, for example, isophorone diisocyanate, 4,4-dicyclohexylmethane diisocyanate, 1 ,6-hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, 2,4,4-trimethyl 1,6-hexamethylene diisocyanate, octadecylene diisocyanate, 1,4-cyclohexylene diisocyanate, 2,4- It is preferable to use at least one selected from the group consisting of toluene diisocyanate, 2,6-toluene diisocyanate, and mixtures thereof.

The Zion pigment 3 used in one embodiment of the present invention is generally used in the art, and the type is not particularly limited, but, for example, a heat sensing temperature of -15 to 70°C may be used. have. Among the above temperature ranges, a group of various types of thermal ink that changes color in a specific temperature range is formed. In particular, in order to more easily indicate the possibility of freezing on the road surface in winter, it is preferable to use a heat sensing temperature between -15 and 5°C. As a more specific type of the Zion pigment, it is preferable to use a reversible Zion pigment such as a metal complex salt, a chorestella liquid crystal, a metamocolor, and a crystal violet lactone.

The acrylate monomer used in one embodiment of the present invention is included to form a solid bond with the acrylic component of the subject to firmly fix the Zion pigment in the thermochromic paint composition for road surface temperature display. The rate monomer is generally used in the art, and its kind is not particularly limited. For example, one or more selected from the group consisting of cyclohexyl acrylate, cyclohexyl methacrylate, alkyl acrylate having a C1 to 20 alkyl group, alkyl methacrylate, and mixtures thereof may be used. .

Another embodiment of the present invention comprises the steps of removing contaminants such as dust and moisture from the road surface; Spray-coating a white primer composition on the road surface, and then drying at a temperature of 20 to 25° C. for 1 to 5 hours to form a white primer layer; And forming a road surface temperature display layer having a thickness of 1 to 5 mm on the white primer layer by spray painting and drying the thermochromic coating composition for road surface temperature display according to an embodiment of the present invention. It provides a construction method of the road surface temperature display line including.

The white primer layer is a layer containing a white primer composition, and is used to improve adhesion between a road surface and a paint composition generally used in the art, and the type is not particularly limited.

More specifically, the white primer composition is an acrylate-styrene-acrylic acid copolymer; Titanium dioxide; Calcium carbonate; Talc; There is an effect of more effectively improving the visibility of the thermochromic paint composition for road surface temperature display according to an embodiment of the present invention by using an organic solvent. Even more specifically, the white primer composition is an acrylate-styrene-acrylic acid copolymer 10 to 20% by weight; 1 to 10% by weight of titanium dioxide; 30 to 40% by weight of calcium carbonate; 10 to 20% by weight of talc; It is recommended to use one containing the remaining amount of organic solvent. In this case, as the organic solvent, at least one selected from the group consisting of toluene, xylene, dimethyl ether, solvent naphtha, and mixtures thereof may be used.

The white primer layer is preferably applied in a thickness of 50 to 100 μm.

Accordingly, according to the thermochromic paint composition for the road surface temperature display and the construction method of the road surface temperature display line using the same according to an embodiment of the present invention, by accurately expressing the freezing state of the road surface, the road or bridge section without a separate external power source It is possible to inform road users of the possibility of freezing of the road surface, from which the road driver can accurately grasp the possibility of freezing of the road surface of the road or bridge section, thereby preventing the risk of an accident. More specifically, an image showing that the color of the road surface temperature display line constructed according to the construction method according to the construction method according to the embodiment of the present invention changes according to the external temperature change is shown in FIG. 2.

In addition, since the thermochromic paint composition for road surface temperature display according to an embodiment of the present invention has a uniform temperature distribution even in a wide area, it is possible to clearly and neatly display the freezing state of the road surface without spots due to temperature differences. There is.

In addition, when there is a possibility of freezing on the road surface, since the thermochromic paint composition for marking the road surface temperature according to an embodiment of the present invention can maintain a temperature relatively higher than the temperature of the surrounding road surface, it slows the freezing of the road surface itself, There is an effect of preventing the formation of black ice on the road surface temperature display layer. Thereby, there is an effect of being able to display the freezing state of the road surface more clearly and neatly.

The thermochromic paint composition for road surface temperature display according to an embodiment of the present invention has an effect of providing a road surface temperature display layer having excellent heat resistance and durability.

Hereinafter, the configuration and effects of the present invention will be described in more detail through examples. However, it is obvious to those skilled in the art that the present invention is not limited to these examples.

<Example 1>

After preparing a dispersion by mixing 100 parts by weight of water and 55 parts by weight of the latent heat storage material (2) encapsulated with an acrylic resin, and mixing and stirring 15 parts by weight of the hollow aluminum silicate structure (1) with 100 parts by weight of the dispersion. , A mixture in which a latent heat storage material (2) having a surface encapsulated in an acrylic resin inside the hollow aluminum silicate structure (1) was infiltrated was prepared. Thereafter, 100 parts by weight of acrylic-modified urethane water dispersion resin, 100 parts by weight of acrylic-modified fluorine resin, and a mixture in which a latent heat storage material (2) whose surface is encapsulated with acrylic resin is penetrated into the hollow aluminum silicate structure (1) prepared above. Mixing of 43 parts by weight of hydrazine, 0.3 parts by weight of hydrazine, 4 parts by weight of isophorone diamine, water-soluble solvent (ethylcellulose, methylcarbitol and butyl alcohol in a volume ratio of 1:1:1 respectively) 43 parts by weight and water 27 parts by weight And, by heat treatment for 40 minutes at a temperature of about 65 ℃, to prepare a subject for a thermochromic coating composition for the road surface temperature display.

On the other hand, 100 parts by weight of isocyanate resin, 97 parts by weight of Zion pigment (3), 87 parts by weight of acrylate monomer, and 100 parts by weight of water are mixed and stirred evenly by screw rotation, and a curing agent for thermochromic paint composition for road surface temperature display Prepared.

In addition, the prepared main material and the curing agent were mixed in a weight ratio of 10:1 and coated on the road surface, followed by heat treatment at a temperature of about 90°C for 30 minutes. At this time, the coating was carried out with a width of 50 mm x 50 mm and a thickness of 2 mm.

<Comparative Example 1>

As a subject, 100 parts by weight of acrylic modified urethane aqueous dispersion resin, 4 parts by weight of isophorone diamine, 43 parts by weight of a water-soluble solvent (ethylcellusolve, methylcarbitol and butyl alcohol are each mixed in a volume ratio of 1:1:1) and Except for using a mixture of 27 parts by weight of water, in the same manner as in Example 1, a subject and a curing agent for a thermochromic paint composition for road surface temperature display were prepared.

In addition, the prepared main material and the curing agent were mixed in a weight ratio of 10:1 and coated on the road surface, followed by heat treatment at a temperature of about 90°C for 30 minutes. At this time, the coating was carried out with a width of 50 mm x 50 mm and a thickness of 2 mm.

<Test Example 2> Product strength evaluation

According to the test method presented in KSM6080, after irradiating the coating film on which the thermochromic paint composition layer for road surface temperature display prepared in Examples and Comparative Examples is formed for 200 hours with a weather resistance tester QUV-B for 200 hours, the deviation in chromaticity (1uminace) was measured. Weatherability was evaluated by measuring. If the chromaticity deviation was less than 0.05, it was marked as good, and if it exceeded, it was marked as bad.

In addition, in order to evaluate the low-temperature impact of the coating film itself, a test specimen for low-temperature impact test having a diameter of 5 cm and a thickness of 25 cm was prepared using the thermochromic coating composition for road surface temperature display prepared in the above Examples and Comparative Examples. . A steel ball was dropped on the prepared specimen at a low temperature and a height of 2 m to evaluate whether the specimen was cracked or cracked. If 6 or more of 10 specimens do not have cracks by dropping 668 g steel balls at 0 ℃, they are marked as C11, and when 668 g of steel balls are dropped at -10 ℃ and there are no cracks at least 6 of 10 specimens C12 Indicated as a grade, when 110 g of steel balls were dropped at -10 ℃ and there were no cracks at least 6 out of 10 specimens, they were marked as C13.

The evaluation results of the weather resistance and low-temperature impact properties are shown in Table 1 below.

Example Comparative example Weather resistance 0.001 (good) 0.07 (bad) Low temperature impact resistance C13 C12

As can be seen in Table 1, when using the thermochromic coating composition for road surface temperature display according to the present invention, it was confirmed that the weather resistance and impact strength at low temperatures were excellent. Accordingly, it is expected that excellent durability can be secured.

1: Hollow aluminum silicate structure
11: acrylic component
12: urethane component and fluorine component
2: Latent heat storage material whose surface is encapsulated with acrylic resin
21: acrylic resin
3: Zion pigment

Claims (6)

Preparing a dispersion by mixing 100 parts by weight of water and 50 to 70 parts by weight of the latent heat storage material (2) encapsulated with an acrylic resin; By mixing and stirring 5 to 20 parts by weight of the hollow aluminum silicate structure (1) in 100 parts by weight of the dispersion, the latent heat storage material (2) whose surface is encapsulated with acrylic resin is penetrated into the hollow aluminum silicate structure (1). Preparing a mixture; And 80 to 120 parts by weight of an acrylic-modified fluorine resin, based on 100 parts by weight of an acrylic-modified urethane water-dispersion resin, and a latent heat storage material (2) whose surface is encapsulated with an acrylic resin in the hollow aluminum silicate structure (1) is penetrated. A subject prepared by a manufacturing method comprising mixing 50 to 80 parts by weight of a mixture, 0.1 to 5 parts by weight of hydrazine, 0.1 to 5 parts by weight of isophorone diamine, 30 to 70 parts by weight of a water-soluble solvent, and 1 to 30 parts by weight of water Wow;
With respect to 100 parts by weight of the isocyanate resin, 70 to 150 parts by weight of Zion pigment (3), cyclohexyl acrylate, cyclohexyl methacrylate, alkyl acrylates having C1 to 20 alkyl groups, alkyl methacrylates, and these And a curing agent comprising 50 to 100 parts by weight of at least one acrylate monomer selected from the group consisting of a mixture and 50 to 150 parts by weight of water;
6 to 10: After mixing at a weight ratio of 1 and coating on the road surface, heat treatment is performed at a temperature of 70 to 90°C for 20 to 40 minutes;
The latent heat storage material (2) whose surface is encapsulated with acrylic resin is maintained at 60 to 90°C in an aqueous solution in which 15 to 30 parts by weight of a surfactant is dissolved, based on 100 parts by weight of water, Acrylic containing 3 to 50 parts by weight of a latent heat storage material, 0 to 80% by weight of methacrylic acid, 20 to 100% by weight of esterified acrylic acid, and 0 to 30% by weight of an ethylenically unsaturated monomer 10 to 40 parts by weight of a monomer compound is added to emulsify, and a polymerization reaction is performed by adding 0.005 to 5 parts by weight of a polymerization initiator to the emulsified mixture, so that the surface of the latent heat storage material is encapsulated with an acrylic resin (21);
The surfactant is one or more selected from the group consisting of polyvinyl alcohol, sodium lauryl sulfate (SLS), hydroxyethyl cellulose, and mixtures thereof, for forming the latent heat storage material into fine particles, or polyethylene sorbitan mono Consisting of oleate (polyoxyethylene sorbitan monooleate), polyethylene sorbitan monostearate, polyethylene sorbitan monopalmitate, polyethylene sorbitan monolaurate, and mixtures thereof Mixing at least one selected from the group with sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, and sorbitan monooleate And used;
The latent heat storage material (2) whose surface is encapsulated with acrylic resin has an average particle diameter of 10 to 100 nm;
The hollow aluminum silicate structure (1) includes at least one silica precursor selected from the group consisting of colloidal silica, tetraethylorthosilicate, fumed silica, sodium silicate, and mixtures thereof, and aluminum nitrate. (Al(NO ₃ ) ₃ ), aluminum phosphate (AlPO ₄ ), aluminum isopropoxide (Al(OCH(CH ₃ ) ₂ ) ₃ ) and at least one alumina precursor selected from the group consisting of a mixture thereof, Preparing a mixture by mixing and stirring a surfactant and acetic acid; Heat-treating the mixture at a temperature range of 333 to 373K; And firing the heat-treated mixture in a temperature range of 373 to 1273 K and an acidic gas atmosphere such as oxygen (O ₂ ) and carbon dioxide (CO ₂ );
The hollow aluminum silicate structure (1) contains an acrylic component (11) and a latent heat storage material (2) inside, and a urethane component and a fluorine component (12), and a Zion pigment (3) on the outside. , The inner acrylic component (11), the outer urethane component (12) and the fluorine component (13) are cross-linked with each other, using the one firmly fixed between the resins;
A thermochromic coating composition for road surface temperature display, characterized in that it has a uniform temperature distribution even in a wide area, and can clearly and neatly display the freezing state of the road surface without spots due to temperature differences.
delete delete delete delete Removing contaminants such as dust and moisture from the road surface;
Spray-coating a white primer composition on the road surface, and then drying at a temperature of 20 to 25° C. for 1 to 5 hours to form a white primer layer; And
Including the step of forming a road surface temperature display layer having a thickness of 1 to 5 mm on the white primer layer by spray-coating and drying the thermochromic paint composition for road surface temperature display according to claim 1 Construction method of the road surface temperature indicator line characterized by.

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