KR101814012B1 - Eco-friendly heat-insulating paint composition and method of applying the same - Google Patents

Abstract

The present invention relates to an eco-friendly heat shielding coating composition and a coating method thereof. More specifically, the eco-friendly heat shielding coating composition uses a hybrid nano-material as a heat shielding material, maximizes the weathering resistance and the physicochemical performance through uniform dispersion of the heat-shielding particles. The eco-friendly heat shielding coating composition does not contain the harmful heavy metals, is eco-friendly in a construction process using the same, and has excellent workability. According to the present invention, the eco-friendly heat shielding coating composition includes: heat shielding powder having the surfaces coated with compounds represented by chemical formula 1; an acrylic resin; a heat shielding pigment; a hollow filler; an anti-freezing agent; an adhesion promoter; and a dispersant. In chemical formula 1, R1 can be selected from groups including a mercaptopropyl group, an aminoethyl group, a vinyl group, a methyl group, a glycidoxypropyl group, a methacryloxypropyl group, a methacryloxypropyl group, a propyl group substituted with fluorine, an ethyl group substituted with fluorine, and a hydrogen group. R2 to R4 can be individually selected from groups including an ethoxy group, a butoxy group, a hydrogen group, and a methoxy group. Not all of R1 to R4 is hydrogen.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an Eco-friendly heat-insulating paint composition and a method of applying the same,

More particularly, the present invention relates to an environmentally friendly thermal barrier coating composition and a coating method thereof, and more particularly, to a method of coating an environmentally friendly heat shielding coating composition and a method of coating the same using a hybrid type nanomaterial as a heat shielding material and maximizing weather resistance and physicochemical performance through uniform dispersion of heat- The present invention relates to an environmentally friendly thermal barrier coating composition which does not contain harmful heavy metals, and which is environmentally friendly when applied through the coating composition, and which is also excellent in workability, and a coating method thereof.

In Korea, since the 1970s, rapid urbanization has intensified due to rapid industrialization, which has caused the city to expand quantitatively. This urbanization has increased the number of residential, commercial and public facilities in urban areas, resulting in a significant decrease in the size of the green areas, an increase in population density, a so-called heat island phenomenon in which the air temperature in the city is higher than the surrounding area due to various artificial heat and air pollutants Island Effects) have begun to emerge as major social and environmental problems.

The heat island phenomenon is the climatic characteristic of urbanization and advanced land use. As a result of the effects of artificial heat, air pollution, buildings, pavement roads, etc., State. Urban heat island phenomenon has the effect of rapidly increasing the surface temperature of buildings due to the rise of high-rise buildings, and as a result, raising the temperature inside the city. The increase of buildings and paved roads has resulted in decrease of green space ratio, Due to reduced effectiveness.

In addition, the summer heat island phenomenon creates an unpleasant environment both inside and outside, and increases the ratio of air conditioning operation time and energy consumption in areas where air conditioners are commonly used. Because of the heat island phenomenon, the warmed air covers the urban space, thereby deteriorating the diffusion and purification of air pollution.

In recent years, many researches have been carried out in domestic and foreign countries to reduce heat island phenomenon, and various technologies related to planting trees in the city have been proposed as a solution. According to the existing research data, it is reported that when the rate of planting trees in the city is increased by 10%, the summer temperature can be decreased by 0.5 ~ 1.0 ℃, and the rooftops of buildings, Bridge railing, retaining walls, and sound barrier walls.

This method is the most fundamental method to solve the cause of the heat island phenomenon, but there are restrictions on the composition of more plant spaces. As another countermeasure for reducing the heat island phenomenon, a method using a heat shielding paint which efficiently reflects the near infrared rays of radiant heat to the road pavement, which is one of the biggest causes of the existing heat island phenomenon, is attracting attention.

Generally, solar radiation (solar radiation) consists of ultraviolet (UV), visible ray, and infrared ray, reaching the earth surface at 4%, 46%, and 50%, respectively. Among the constituents of solar radiation, the factor that has the greatest influence on the heat island phenomenon is infrared ray having a wavelength longer than that of visible light. The heat paints have the effect of lowering the temperature by reducing the absorption rate of the solar radiation of the coating object by highly reflecting the near infrared rays occupying about half of the solar radiation energy.

However, the conventional general heat paints have a problem that, when the paint is deteriorated due to contamination on the surface, environmental factors and other actions after coating, the heat shielding performance is drastically deteriorated.

In order to solve these problems, researches have been actively carried out in the United States, Japan and the like to develop pigments having high functionality, physically and chemically stable, various colors and excellent infrared reflectance, and applying them to building interior and exterior materials. Has reached the practical stage.

Therefore, in Korea, as the living standard is increasing, the diversity of product sensibility and the demand for functionality are increasing, so technology for environmentally friendly train endcoat which can give high comfort and safety is indispensable. This technology can provide a comfortable living environment by preventing the tropical night effect of the city, the mass of livestock due to the radiant heat of the roof of the house, and the rapid rise of the temperature of the outer wall of the building.

Prior Art 1 (Korean Patent Publication No. 10-1291894) relates to a composition for a heat-shrinkable paint, wherein a heat pigment and a hollow bead are used, but since the content of expensive pigment is relatively high, viscosity control of the composition of the heat- And has problems in adhesion performance. Prior Art Document 2 (Korean Patent Registration No. 10-1565962) relates to a composition for soundproofing, which is a composition containing talc and metal nanoparticles, thereby improving the heating efficiency of a building. However, Lt; / RTI > Prior Art 3 (Korean Patent Registration No. 10-1434501) relates to a heat-sensitive coating composition, wherein a heat-treated material and a hollow bead surface-treated with a silane coupling agent are used, but the upper layer and the lower layer are coated, , The application process is complicated, and the like. Prior Art Document 4 (Korean Patent Publication No. 10-1618528) relates to a heat-shielding paint composition comprising a phase-change material, which uses a macroporous substance bearing a phase-change material, but has problems such as poor adhesion performance and weatherability have.

Prior Art Document 1: Korean Registered Patent Publication (Korean Patent Publication No. 10-1291894, Publication Date: Jul. 31, 2013) Prior Art 2: Korean Patent Publication No. 10-1565962, Publication Date: November 5, 2015) Prior Art 3: Korean Registered Patent Publication (10-1434501, Publication Date: Aug. 26, 2014) Prior Art 4: Korean Patent Registration Bulletin (Korean Patent Publication No. 10-1618528 Publication Date 2016.05.09)

The present invention is to solve the problems of the conventional heat shielding composition as described above. The present invention aims at maximizing the weathering and physicochemical performance through uniform dispersion of the nanoparticles contained in the heat shielding coating composition of the present invention The purpose is to have.

In addition, the present invention maximizes weatherability and physicochemical performance through uniform dispersion of heat-shielding particles by using a hybrid nanomaterial as a heat shielding material, and provides a environmentally friendly heat seal coating composition that does not contain harmful heavy metals in the coating It is environment-friendly when constructing through it, and is excellent in workability and minimizes defects.

In order to solve such a technical problem,

A surface heat-coated powder coated with a compound represented by the general formula (1); Acrylic resin; Heat pigment; A hollow filler; Antifreeze agents; Adhesion promoters; Dispersing agent; [Claim 7] The environmentally friendly thermal barrier coating composition according to claim 1,

In Formula 1,

Wherein R 1 is a mercapto group, an aminoethyl group, a vinyl group, a methyl group, a glycidoxypropyl group, a methacryloxypropyl group, a methacryloxypropyl group, a propyl group substituted with fluorine, And R 2 to R 4 are each selected from an ethoxy group, a butoxy group, a hydrogen group and a methoxy group, and R 1 to R 4 are not all hydrogen.

The particle size of the heat shielding powder is 1 to 20 nm,

Wherein the hollow filler is silica-based fine particles.

At this time, at least one of titanium dioxide, zinc oxide, and zirconium oxide is selected as the heat shielding powder.

The silica-based fine particles are characterized in that they are selected from the group consisting of borosilicate glass, aluminosilicate, and silicate.

The heat-sensitive coloring pigments may be prepared by mixing antimony oxide (Sb2Ox) and talc (Mg3Si4O10 (OH) 2) in a mixed weight ratio of 1: 1 to 5.

The compound represented by the general formula (1) may be at least one selected from the group consisting of 3-glycidoxypropyltriethoxysilane, 3-aminopropyltributoxysilane, 3-methacryloxybutylsilane, 3-mercaptopropyltriethoxysilane, 3- Vinyltriethoxysilane, methyltriethoxysilane, vinylmethyldiethoxysilane, methyltriethoxysilane, methyltriethoxysilane, vinyltriethoxysilane, vinyltriethoxysilane, methyltriethoxysilane, vinylmethyldiethoxysilane, methyltriethoxysilane, Aminopropyltrimethoxysilane, isopropyloxysilane, methyltriacetoxysilane, beta-aminoethyl-gamma-aminopropylethoxysilane, fluoropropyltriethoxysilane, and trifluoropropyltrimethoxysilane.

Also, the environmentally friendly thermal barrier coating composition comprises 5 to 20 parts by weight of a heat-shielding powder coated with a compound represented by the general formula (1); 40 to 80 parts by weight of an acrylic resin; 15 to 20 parts by weight of a heat pigment; 15 to 20 parts by weight of a hollow filler; 0.5 to 5 parts by weight of a cryoprotectant; 0.5 to 5 parts by weight of an adhesion promoter; 0.5 to 5 parts by weight of a dispersant; And a control unit.

The environmentally friendly thermal barrier coating composition further includes one or more additives selected from a coloring agent, a defoaming agent, a plasticizer, a UV stabilizer, an ultraviolet screening agent, a viscosity modifier, an inorganic particle, a surface smoothing agent, a sedimentation inhibitor, a surfactant, .

The inorganic particles may be at least one selected from the group consisting of quartz, alumina, magnesium oxide, volcanic ash, mica, pearl, bentonite, clay and montmorillonite.

The acrylic resin has a glass transition temperature (Tg) of 20 to 60 ° C and a weight average molecular weight of 5,000 to 50,000.

Further, the heat-generating powder coated with the compound represented by Formula 1 is plasma-treated.

The present invention, however,

A high-pressure washing step for removing foreign matter or debris from the surface of the target structure; Priming the surface of the cleaned object structure; Applying the environmentally friendly thermal barrier coating composition according to any one of claims 1 to 10 to the primer treated surface; And drying the applied environmentally friendly thermal barrier coating composition. The present invention also provides an application method of an environmentally friendly thermal barrier coating composition.

And repeating the application step and the drying step one or more times.

According to the present invention having the above-described structure, the hybrid nanomaterial is used as a heat shielding material to maximize the weathering and physicochemical performance through uniform dispersion of the heat-shielding particles. Since the harmful heavy metal is not contained in the paint, The present invention provides a coating composition, which is environmentally friendly when applied, has excellent workability, and has an effect of improving the durability of a barrier structure by fundamentally cutting off heat conduction, corrosion prevention and deterioration factors to a structure.

The present invention relates to an environmentally friendly thermal barrier coating composition and a coating method thereof. The present invention provides an environmentally friendly thermal barrier coating composition comprising: a heat-sensitive powder coated with a compound represented by Chemical Formula 1; Acrylic resin; Heat pigment; A hollow filler; Antifreeze agents; Adhesion promoters; Dispersing agent; .

In addition, the above formula (1)

. (Wherein R1 in the general formula (1) is a mercapto group, an aminoethyl group, a vinyl group, a methyl group, a glycidoxypropyl group, a methacryloxypropyl group, a propyl group substituted with fluorine, an ethyl group substituted with fluorine, And R2 to R4 may be respectively selected from an ethoxy group, a butoxy group, a hydrogen group and a methoxy group, and R1 to R4 are not all hydrogen.

 The compound represented by Formula 1 is specifically exemplified by 3-glycidoxypropyltriethoxysilane, 3-aminopropyltributoxysilane, 3-methacryloxybutylsilane, 3-mercaptopropyltriethoxy Silane, 3-mercaptopropylmethoxysilane, 3-methacryloxyethoxysilane, 3-methacryloxybutylsilane, vinyltrimethoxysilane, vinyltriethoxysilane, methyltriethoxysilane, vinylmethyldiethoxy Silane, methyltriisopropoxysilane, methyltriacetoxysilane, beta-aminoethyl-gamma-aminopropylethoxysilane, fluoropropyltriethoxysilane, and trifluoropropyltrimethoxysilane.

The heat-shrinkable powder of the present invention can be selected from among titanium dioxide, zinc oxide and zirconium oxide, and the particle size of the heat-shrinkable powder is preferably 1 to 20 nm.

Further, the surface heat-coated powder coated with the compound represented by Chemical Formula (1) of the present invention chemically modifies the surface of the heat-shielding powder so that the heat-shielding material is uniformly applied to the surface layer of the coating due to hydrophobicity when applied together with the coating, The heat-shielding material of the nanoparticles existing on the surface effectively reflects the sunlight to maximize the heat-shielding effect.

At this time, the coating of Formula 1 for the heat shielding powder may be performed by an impregnation method, a spray method, or a vapor deposition method.

Particularly, in the method of coating the heat-shielding powder with the formula (1), the compound of the formula (1) is mixed with the heat-generating powder together with the organic solvent, stirred and then the organic solvent is removed (impregnation method) spraying method may be applied. Examples of the organic solvent used in the impregnation method include dichloromethane, methanol, ethanol, propanol, ethylacetate, and the like, which are well mixed with the heat- Diethyether and the like can be used. However, the solvent is not limited to the above solvents because it can change the solvent by the characteristics of the heat shielding powder and the formula (1).

 In the coating method of the heat shielding powder, the mixing time is suitably about 10 minutes to 6 hours, which can be appropriately adjusted according to the amount of the heat-insulating material to be produced and the content of the chemical formula (1).

 The present invention can remarkably improve problems such as deterioration of adhesive force and crack resistance of a paint by using a heat-treated powder whose surface is coated with a compound represented by the formula (1) as described above. In addition, the heat shield coating composition of the present invention can solve the problem that the heat shielding effect of the coating material applied due to sedimentation or the like in the existing heat shield material is lowered.

Further, the surface-coated powder of the compound represented by the formula (1) may be prepared by further performing a plasma treatment on the coated surface.

At this time, the plasma treatment conditions are treated in an oxygen atmosphere, and the process time may vary depending on the output and the pressure of the plasma.

The hollow filler of the present invention is silica-based fine particles, and the silica-based fine particles may be selected from the group consisting of borosilicate glass, aluminosilicate, and silicate. The hollow filler is hollow spherical particles, and a hollow body in which the hollow portion is closed is used.

The hollow beads are excellent in heat insulation due to their low thermal conductivity. However, when the hollow body is porous or open pore structure, there is a problem that the paint penetrates into the inside through the surface pores when mixing with the paint, The use of a closed hollow body can maximize the heat insulation performance. The hollow filler may have an average particle size of 10 to 50 mu m, preferably 10 to 40 mu m, more preferably 10 to 30 mu m.

For example, the hollow filler of the present invention can be a hollow body having an average particle size of 20 μm, a 90% particle size of 30 μm or less, and a maximum particle size of 40 μm or less. The hollow filler may be at least one selected from the group consisting of borosilicate glass, aluminosilicate, silicate, and the like. The hollow filler may have an average density of about 0.18 to 0.22, particularly about 0.20. In addition, the hollow filler can exhibit excellent heat insulating performance with low refractive index and low thermal conductivity.

In the embodiment of the present invention, the heat-sensitive coloring pig may be a mixture of antimony oxide (Sb2Ox) and talc (Mg3Si4O10 (OH) 2), and the mixed weight ratio thereof may be 1: 1-5.

Further, in the embodiment of the present invention, the acrylic resin may be composed of an ethylenically unsaturated monomer, an acrylic monomer containing a hydroxyl group, an acrylic monomer containing an acid group, and an acrylic monomer containing an amine group.

Examples of the ethylenically unsaturated monomer include styrene, methyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, tertiary butyl (Meth) acrylate, benzyl (meth) acrylate, isobonyl (meth) acrylate, and lauryl (meth) acrylate. Examples of the acrylic monomer containing a hydroxyl group include Hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, and hydroxyethyl (meth) acrylate with addition of epsilon-caprolactone may be used, As the acrylic monomer containing an acid group, for example, (meth) acrylic acid, pumaric acid, acrylic acid dimer, maleic acid and the like can be used. As the acrylic monomer containing an amine group, G., Diethylaminoethyl methacrylate, and the like can be used dimethylaminoethyl methacrylate, (meth) acrylamide.

In another embodiment of the present invention, the acrylic resin preferably has a weight average molecular weight of 5,000 to 50,000. When the weight average molecular weight is less than 5,000, there is a problem that the colorant has problems such as pigment precipitation and degradation of dispersibility. There is a problem that the VOC content of the colorant increases due to the viscosity increase.

The glass transition temperature (Tg) of the acrylic resin is preferably 20 to 60 ° C. When the glass transition temperature is lower than 20 ° C, there is a problem of coating film hardness. When the glass transition temperature is higher than 60 ° C, there is a problem such as impact resistance.

In the embodiment of the present invention, the composition ratio to the environmentally friendly thermal barrier coating composition is 5 to 20 parts by weight of the surface-coated powder of the compound represented by the formula (1); 40 to 80 parts by weight of an acrylic resin; 15 to 20 parts by weight of a heat pigment; 15 to 20 parts by weight of a hollow filler; 0.5 to 5 parts by weight of a cryoprotectant; 0.5 to 5 parts by weight of an adhesion promoter; 0.5 to 5 parts by weight of a dispersing agent.

Specific examples of the cryoprotectant include low molecular weight glycols, and ethylene glycol, diethylene glycol, propylene glycol, glycerin and the like are usable. However, when the temperature is below -20 ° C., the product is not effective even if it is used in an amount of 5 parts by weight or more. Therefore, it is preferable to store the product in a warmed warehouse and the cryoprotectant is added in a content ratio of 0.5 to 5 parts by weight, It should be added within the range, so that the effect of maintaining the adhesive strength and strength is excellent without causing excessive cost.

The adhesion promoter of the present invention uses a phosphoric acid adhesion promoter. The phosphoric acid-based adhesion promoter has a number average molecular weight of 500 to 1,000, and has an oxide and a hydroxoxide group (Group), so that the adhesion between the paint and the surface of the material can be increased. The adhesion-promoting agent is preferably added at a content ratio of 0.5 to 5 parts by weight, and it should be added within the above-mentioned range to maintain adhesion and water resistance without causing excessive cost.

The aqueous dispersing agent is preferably a polymer wetting and dispersing agent having an acid group, and more preferably a polymer wetting and dispersing agent having an acid value of 20 to 200 mgKOH / g, although the dispersing agent is not particularly limited and may be used for a dispersion stabilizer . Specific examples thereof include polymer wetting and dispersing agents such as BYK-W161, BYK-W903, BYK-W940, BYK-W996, BYK-W9010, Disper-BYK110, Disper-BYK 180, BYK-P 4102, byk-p-9065, and the like. It is preferable that such an aqueous dispersing agent is added at a content ratio of 0.5 to 5 parts by weight. This is because if it is added within the above-mentioned range, the dispersibility becomes higher without an excessive cost, and the effect such as suppression of molding unevenness is excellent.

In another embodiment of the present invention, the environmentally friendly thermal barrier coating composition may further comprise a diluent, and the diluent may be selected from the group consisting of monohydric alcohols, polyhydric alcohols, ethers, glycol ethers, glycol acetates, aliphatic hydrocarbons, Based hydrocarbons, and water (water).

Further, in another embodiment of the present invention, the environmentally friendly thermal barrier coating composition is selected from colorants, defoaming agents, plasticizers, ultraviolet light stabilizers, ultraviolet screening agents, viscosity modifiers, inorganic particles, surface smoothing agents, anti-settling agents, surfactants, It further comprises one or more additives.

Among these additives, the inorganic particles may include at least one selected from the group consisting of quartz, alumina, magnesium oxide, volcanic ash, mica, pearl, bentonite, clay and montmorillonite. The inorganic particles have the best viscosity, heat resistance, durability, and workability of the adhesive within a range of 5 to 50 parts by weight. When the inorganic particles are used in an excessive amount, the viscosity may deteriorate the workability and the adhesive strength of the adhesive may be remarkably lowered.

The anti-settling agent serves to prevent the re-aggregation of the particles dispersed in the resin to maintain the storage stability of the composition. The anti-settling agent may be any known anti-settling agent. The anti-settling agent is preferably added at a content ratio of 0.1 to 1 part by weight based on 100 parts by weight of the coating composition. This is because the anti-settling agent should be added within the above range to exhibit excellent anti-aggregation effect without causing excessive cost.

As the antifoaming agent and plasticizer, known antifoaming agents and plasticizers may be used. These antifoaming agents and plasticizers are preferably added in small amounts in the range of 0.1 to 1 part by weight, respectively, which does not impair the adhesive strength and physical properties of the adhesive.

Examples of the extender pigments include extender pigments, coloring pigments and dyes, and the extender pigments include calcium carbonate, magnesium carbonate, silica, silica-alumina, glass powder, glass beads, mica, graphite, , Kaolin, acidic clay, activated clay, bentonite, diatomaceous earth, montmorillonite, dolomite and the like can be selected and used, but the present invention is not limited thereto.

Examples of the coloring pigment include titanium oxide, zinc oxide, carmine 6B (CI12490), phthalocyanine green (CI 74260), phthalocyanine blue (CI 74160), Mitsubishi carbon black MA100, perylene black (BASF K0084.K0086) LINOL YELLOW (CI 21090), LINOL YELLOW GRO (CI 21090), Benzidine Yellow 4T-564D, Mitsubishi Carbon Black MA-40, Victoria Pure Blue (CI 42595) PIGMENT RED97, 122, 149, 168, 177, 180, 192, 215, C.I. PIGMENT GREEN 7, 36, C.I. PIGMENT 15: 1, 15: 4, 15: 6, 22, 60, 64, C.I. PIGMENT 83, 139 C.I. PIGMENT VIOLET 23 and the like can be selected and used, but the present invention is not limited thereto.

As the antioxidant, 2,2-thiobis (4-methyl-6-t-butylphenol) or 2,6-di-t-butylphenol can be used.

As the surfactant, for example, a cationic surfactant, an anionic surfactant, a nonionic surfactant, a positive surfactant, and a reactive surfactant can be used. As the surfactant, those having an alkyl group, an alkenyl group, an alkylaryl group or an alkenylaryl group having 4 or more carbon atoms as a hydrophilic group are generally used. Examples of the nonionic surfactant include polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene nonylphenyl ether, polyoxyethylene sorbitan monolaurate, and the like. Examples of the anionic surfactant include sodium dodecylbenzenesulfonate, sodium sulfosuccinate, sodium lauryl sulfate, sodium polyoxyethylene lauryl sulfate and the like. Examples of the cationic surfactant include stearyltrimethylammonium chloride, cetyltrimethylammonium bromide, and the like. Examples of the amphoteric surfactant include lauryldimethylaminoacetic acid betaine and the like. In addition, a so-called reactive surfactant having a radically polymerizable functional group may be used for the surfactant, and when a reactive surfactant is used, the water resistance of the coating formed using the resin dispersion can be improved. Representative commercially available reactive surfactants include Eleminol JS-2 (manufactured by Sanyo Chemical Industries, Ltd.) and Latex S-180 (manufactured by Kao Corporation).

The ultraviolet absorber may be, but is not limited to, 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chloro-benzotriazole or alkoxybenzophenone.

In the present invention, a high-pressure washing step for removing foreign substances or debris from the surface of a target structure to apply the environmentally friendly heat-shading coating composition; Priming the surface of the cleaned object structure; Applying the environmentally friendly thermal barrier coating composition of the present invention to the primer treated surface; And drying the applied environmentally friendly heat-shrinkage coating composition. The heat-shrinkable coating composition of the present invention may be applied by coating.

Further, in the present invention, the coating step may be further performed by further repeating the coating step and the drying step one or more times.

As the primer, known primers can be used.

As a concrete example of the primer of the present invention, a water-soluble acrylic or water-soluble latex primer may be diluted with water at a ratio of 1: 2 to 3 and applied.

Hereinafter, the present invention will be described in detail. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to preferred embodiments of the present invention.

A surface heat-coated powder coated with a compound represented by Chemical Formula 1 described in Table 1 below; Acrylic resin; Heat pigment; A hollow filler; Antifreeze agents; Adhesion promoters; Dispersing agent; To prepare an environmentally friendly thermal barrier coating composition. Comparative Examples were prepared according to the contents shown in Table 1 below.

(Production Example 1: Acrylic resin)

35 parts by weight of benzylmethacrylate was heated to 80 DEG C in a four-necked flask, and then 25 parts by weight of hydroxyethyl acrylate, 25 parts by weight of methacrylate and 0.4 part by weight of benzoyl peroxide were mixed and stirred. Over 3.5 hours. After aging for about 1 hour, 15 parts by weight of 3-methoxybutyl acetate and 0.1 part by weight of benzoyl peroxide were mixed well and then added dropwise and aged for 1 hour to obtain an acrylic resin.

(Preparation Example 2: surface heat-coated powder)

2 g of titanium dioxide (TiO 2) having an average particle diameter of 1 to 20 nm was mixed with 100 ml of organic solvent dichloromethane and 0.5 g of 3-mercaptopropyltriethoxysilane, stirred at 25 ° C for 1 hour, And the reaction was carried out at 120 ° C. for 12 hours in a hydrothermal reactor. After completion of the hydrothermal reaction, titanium dioxide nanoparticles were dried at 100 ° C for 2 hours to completely remove dichloromethane to prepare nanoparticulate titanium dioxide having a modified surface.

(Preparation Example 3: surface heat-coated powder)

A surface-modified nano-sized zinc oxide was prepared in the same manner as in Production Example 2, except that 2 g of zinc oxide (ZnO2) was used as the surface-modified nano-sized particle size modified powder.

(Preparation Example 4: surface heat-coated powder)

The surface modified nano-sized zirconium oxide was prepared in the same manner as in Production Example 2, except that 2 g of zirconium oxide was used as the surface-modified nano-particle size secondary powder.

(Preparation Example 5: surface-coated heat-shrinkable powder)

Mixed nano-sized titanium dioxide and zinc oxide whose surface was modified in the same manner as in Production Example 2 were prepared, except that 1 g of titanium dioxide and 1 g of zinc oxide were used as the surface-modified nano-sized particles.

The following Table 1 shows the respective components of the environmentally friendly heat-curing coating composition and the content thereof in Examples 1 to 5 and Comparative Examples 1 to 3. The above content shows the weight parts of the respective components based on 60 parts by weight of the acrylic resin produced in Production Example 1. [

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 The resin of Production Example 1 (One) 60 60 60 60 60 60 60 60 The differential thermal powder of Production Example 2 (2) 20 10 20 The heat-shielding powder of Preparation Example 3 (3) 20 The differential thermal powder of Production Example 4 (4) 20 10 The differential thermal powder of Production Example 5 (5) 20 Heat pigment (6) 15 15 15 15 15 15 Hollow filler (7) 20 20 20 20 20 20 20 20 Cryoprotectant (8) One One One One One One One One Adhesion promoter (9) One One One One One One One One Dispersant (10) 2 2 2 2 2 2 2 2

(1) The acrylic resin of Production Example 1

(2) The surface heat-coated powder of Preparation Example 2

(3) The surface heat-coated powder of Preparation Example 3

(4) The surface heat-coated powder of Preparation Example 4

(5) The surface heat-coated powder of Preparation Example 5

(6) Heated pigment: mixture of antimony oxide and talc (mixed weight ratio is 1: 1)

   - Antimony Oxide: Young Shin Chemical

   - Talc: Daemyung Chemical Products

(7) Hollow filler (aluminosilicate, Daemyung Chemical)

(8) Cryoprotectants (ethylene glycol, Sigma Aldrich)

(9) adhesion promoter (BYK4200, manufactured by BYK)

(10) Dispersing agent (BYK-P 4102, manufactured by BYK)

Table 2 shows the results of testing the physical properties of the environmentally friendly thermal barrier coating compositions prepared in Examples 1 to 5 and Comparative Examples 1 to 3.

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Solidification drying (h) 5 5 5 5 5 4.7 4.8 4.6 Flexibility clear clear clear clear clear clear clear clear Adhesive resistance clear clear clear clear clear clear clear clear Weatherability clear clear clear clear clear Bad Bad Bad Infrared Reflectance (%) 92 90 91 92 91 60 70 60 Through heat performance test
Sample surface temperature (캜) 52 54 53 52 53 68 63 68 Mercury Not detected Not detected Not detected Not detected Not detected Not detected Not detected Not detected

(Infrared reflectance)

In the present invention, the reflectance of each infrared wavelength is calculated by using a UV-VIS-NIR spectrophotometer (Jasco V-570) according to Japanese Industrial Standard JIS A 5759 by using the following equation (1) And the higher the numerical value, the better the infrared reflection effect.

는 총 적외선 반사율이며,

는 직접 도달하는 태양방사 상대값의 표준 스텍트럼 분포이며,

는 중가계수이며,

는 각 파장별 반사율이다.In the above equation (1)

Is the total infrared reflectance,

Is the standard spectral distribution of direct sun radiation relative values,

Is a weighted coefficient,

Is the reflectance of each wavelength.

(Differential thermal performance test)

The heat differential performance test was conducted by making the upper open box itself as a square in order to compare the heat transfer performance by the coating type for the heat transfer through the wall of the building. The specimens were irradiated with an infrared lamp having a similar effect as that of the sunlight at a certain distance, and the specimen was irradiated with infrared rays at a center of the surface of the specimen A temperature sensor was installed to measure the temperature change over time.

At this time, the lamp irradiation time was measured as 4h on average, in order to reach the steady-state state at about 4h.

In order to carry out this experiment, an infrared lamp of OSRAM 100 W was used. The temperature measuring device was a data logger (middle logger GL820, Graphtec) And the change in the measured temperature was analyzed.

As shown in Table 2 above, when applied to a structure using the environmentally friendly thermal barrier coating composition of the embodiment, it is possible to maximize the weathering and physico-chemical performance owing to the uniform dispersion of the heat-shielding particles and the heat-shielding pigment, Environmentally friendly.

Also, it is excellent in workability, and it improves the durability of the barrier structure by fundamentally blocking the thermal barrier, corrosion prevention and deterioration factor for the structure. When the coating composition is applied by using the environmentally friendly thermal barrier coating composition of the present invention, the infrared reflectance is excellent and the surface temperature is low.

In addition, it has been confirmed that mercury or other heavy metals are not substantially detected in the coating film using the composition of the above embodiments, and no harmful substances are produced in the human body.

The present invention has been described in detail by way of examples and experimental examples. The above embodiments are merely illustrative examples for explaining the present invention in more detail, and the nature of the technical idea of the present invention is not changed or reduced. It will be obvious to those skilled in the art that various embodiments and applications not shown in the above embodiments are possible.

More particularly, the present invention relates to an environmentally friendly thermal barrier coating composition and a coating method thereof, and more particularly, to a method of coating an environmentally friendly heat shielding coating composition and a method of coating the same using a hybrid type nanomaterial as a heat shielding material and maximizing weather resistance and physicochemical performance through uniform dispersion of heat- The present invention relates to an environmentally friendly thermal barrier coating composition which does not contain harmful heavy metals, and which is environmentally friendly when applied through the coating composition, and which is also excellent in workability, and a coating method thereof.

Claims (12)

5 to 20 parts by weight of a heat-sensitive powder coated with a compound represented by the general formula (1); 40 to 80 parts by weight of an acrylic resin; 15 to 20 parts by weight of a heat pigment; 15 to 20 parts by weight of a hollow filler; 0.5 to 5 parts by weight of a cryoprotectant; 0.5 to 5 parts by weight of an adhesion promoter; 0.5 to 5 parts by weight of a dispersing agent,
In Formula 1,

Wherein R 1 is a mercapto group, an aminoethyl group, a vinyl group, a methyl group, a glycidoxypropyl group, a methacryloxypropyl group, a methacryloxypropyl group, a propyl group substituted with fluorine, And R 2 to R 4 are each selected from an ethoxy group, a butoxy group, a hydrogen group and a methoxy group, and R 1 to R 4 are not all hydrogen.
The particle size of the heat-shielding powder is 1 to 20 nm, and the heat-shielding powder is selected from titanium dioxide, zinc oxide and zirconium oxide. The surface-coated powder is coated with a compound represented by the formula (1)
The heat-sensitive coloring pigments are prepared by mixing antimony oxide (Sb2Ox) and talc (Mg3Si4O10 (OH) 2) in a weight ratio of 1: 1 to 5,
The hollow filler is a silica-based fine particle,
The acrylic resin is composed of a ternary copolymer of benzyl methacrylate-methacrylate-hydroxyethyl acrylate,
Wherein the adhesion promoting agent is a phosphoric acid adhesion promoting agent and has a number average molecular weight ranging from 500 to 1,000.
delete The method according to claim 1,
Wherein the silica-based fine particles are at least one selected from the group consisting of borosilicate glass, aluminosilicate, and silicate.
delete The method according to claim 1,
The compound represented by the general formula (1) is preferably selected from the group consisting of 3-glycidoxypropyltriethoxysilane, 3-aminopropyltributoxysilane, 3-methacryloxybutylsilane, 3- mercaptopropyltriethoxysilane, Vinyltriethoxysilane, vinyltriethoxysilane, vinyltriethoxysilane, vinyltriethoxysilane, methyltriethoxysilane, vinyltriethoxysilane, vinyltriethoxysilane, vinyltriethoxysilane, vinyltriethoxysilane, vinyltriethoxysilane, Wherein the composition is at least one selected from the group consisting of sodium silicate, sodium silicate, sodium silicate, sodium silicate, sodium silicate, sodium silicate, sodium silicate, sodium silicate, sodium silicate, sodium silicate,
delete The method according to claim 1,
The above-mentioned environmentally friendly thermal barrier coating composition further includes one or more additives selected from a coloring agent, a defoaming agent, a plasticizer, a UV stabilizer, an ultraviolet screening agent, a viscosity controlling agent, an inorganic particle, a surface smoothing agent, a sedimentation inhibitor, a surfactant, By weight based on the total weight of the composition.
8. The method of claim 7,
Wherein the inorganic particles are at least one selected from the group consisting of quartz, alumina, magnesium oxide, volcanic ash, mica, pearl, bentonite, clay and montmorillonite.
delete delete A high-pressure washing step for removing foreign matter or debris from the surface of the target structure;
Priming the surface of the cleaned object structure;
Applying the environmentally friendly thermal barrier coating composition according to any one of claims 1, 3, 5, 7, and 8 to the primer treated surface; And
And drying the applied environmentally friendly thermal barrier coating composition. ≪ RTI ID = 0.0 > 11. < / RTI >
12. The method of claim 11,
And repeating the applying step and the drying step one or more times. ≪ RTI ID = 0.0 > 11. < / RTI >