KR20090093128A - Transparent Paint For Energy-Saving And Method Of Forming Transparent Film Using The Same - Google Patents

Abstract

Transparent paint is provided to secure transparency in window and door of building, to ensure antifouling property, and to maintain solar energy blocking effect and heat insulation effect. Transparent paint for energy saving comprises at least one inorganic pigment 10-30 weight% selected from the group consisting of indium tin oxide, antimony tin oxide, and aluminum zinc oxide, which have average particle size of 10-80 nm; solvent 0.5-25 weight%; and excessive binder resin. A method for forming the transparent film for energy saving comprises the steps of: applying the transparent paint for energy saving on an object; and drying the transparent paint for energy saving applied on the object to form the transparent film for energy saving.

Description

Transparent Paint For Energy-Saving And Method Of Forming Transparent Film Using The Same}

The present invention relates to an energy-saving transparent paint and a method for forming a coating film using the same, and more particularly, to form an energy-saving transparent paint and an energy-saving transparent paint film using the same. It is about a method.

In the case of the existing heat shielding and thermal insulation paint, an opaque white paint using hollow acid inorganic silicate and bubble alumina, which is empty in a binder, was used as disclosed in Korean Patent Laid-Open Publication No. 2005-0064084. The opaque white paint was mainly applied to the concrete wall of the building or the roof of a factory, such as to block the solar energy to obtain an insulation effect.

However, windows and doors, which occupy the main part of the building, are unable to apply the above-mentioned insulation paint due to their transparency, so they not only receive hot direct sunlight from the sun but also emit indoor heat as one of the biggest causes of energy loss in the building. It works. That is, in winter, the indoor heat due to the transparent window is leaked out to increase the heating cost, and in summer, the external heat is passed from the outside as it is, which causes the cooling cost to rise.

In particular, large and small buildings such as newly built apartments, office buildings, residential complexes, etc., tend to finish many parts of buildings with transparent materials to secure the luxury, light effect, and view of the exterior. As such, windows and doors use additional awning devices such as curtains, blinds, and verticals to block the energy loss for cooling / heating as the weight of windows or materials for various effects increases. This has an increasing disadvantage. Accordingly, there is a demand for the development of a paint that can be coated on a transparent window or the like to form a transparent insulating coating film.

An object of the present invention for solving the above problems is to provide a transparent paint that can maintain the non-polluting and solar energy blocking effect continuously while ensuring transparency in the windows of buildings that can not be coated with the existing heat shielding paint.

In addition, another object of the present invention is to provide a method of forming a transparent insulating coating film using a transparent paint having the composition described above.

Therefore, the energy-saving transparent paint according to an embodiment of the present invention for achieving the above object has an average particle size of 10 to 80 nm indium tin oxide (lTO), antimony tin oxide (ATO) and aluminum zinc oxide (AZO). At least one inorganic pigment selected from the group consisting of 10 to 30% by weight, and a solvent containing 0.5 to 25% by weight and an extra binder resin.

Energy-saving transparent paint according to another embodiment of the present invention for achieving the above object is lTO (Indium tin oxide), ATO (Antimony tin oxide) and aluminum zinc oxide (AZO) having an average particle size of 10 to 80nm 10-30% by weight of at least one inorganic pigment selected from the group consisting of 0.2 to 6% by weight of an infrared absorber, ultraviolet absorber or a mixture thereof, 0.5 to 25% by weight of a solvent and a UV curable resin, acrylic resin, urethane resin and silicone inorganic It has a composition containing at least one binder resin selected from the group consisting of a resin, a silica sol-based resin and an organic inorganic hybrid resin.

Energy-saving transparent paint according to another embodiment of the present invention for achieving the above object has an average particle size of 10 to 80nm indium tin oxide (lTO), antimony tin oxide (ATO) and aluminum zinc oxide (AZO) 10-30% by weight of at least one inorganic pigment selected from the group consisting of 0.2 to 6% by weight of infrared absorbers, ultraviolet absorbers or mixtures thereof, 0.5 to 25% by weight of solvents and methyl-silicate, siloxane compounds or these 0.1 to 4% by weight of the mixture and UV-curable resin, acrylic resin, urethane resin silicone inorganic resin, silica sol resin and organic inorganic hybrid resin at least one binder resin selected from the group consisting of an additional.

According to the energy-saving transparent coating film forming method according to an embodiment of the present invention for achieving the above another object, first, the average particle size of 10 to 80nm lTO (Indium tin oxide), ATO (Antimony tin oxide) and AZO An energy-saving transparent paint comprising 10-30 wt% of at least one inorganic pigment selected from the group consisting of (Aluminum zinc oxide), 0.5-25 wt% of a solvent, and an extra binder resin is applied onto the object. Thereafter, the energy saving transparent paint applied on the object is dried. As a result, an energy saving transparent coating film is formed on the object.

As described above, the energy-saving transparent paint containing the nano-inorganic pigment is not only excellent in the solar heat shielding effect, but also excellent in the prevention of contamination compared to the existing heat shielding paint. For this reason, it is possible to effectively maintain the excellent solar heat shielding and thermal insulation effect for a long period of time even in the outdoors where it is directly exposed to sunlight, compared to the performance degradation caused by the contamination of the coating film. As a result, the transparent paint of the present invention can exhibit excellent performance for a long time by applying to various buildings, facilities, facilities, parts, etc. that require the blocking of sunlight.

Hereinafter, preferred embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the technical idea of the present invention. However, the present invention is not limited to the embodiments described herein and may be implemented in various forms. Rather, the embodiments disclosed herein are provided to enable the spirit of the present invention to be thorough and complete, and to fully convey the spirit of the present invention to those skilled in the art.

Energy-saving transparent paint 1

The energy-saving transparent paint of the present invention maximizes the light transmittance in the visible light region at the same time, while the reflectance is low, and the light transmittance in the infrared region is low and the reflectance is high to maximize the room brightness by the visible light transmission. The transfer of heat by infrared rays is applied to form a transparent coating film which can be minimized.

That is, the energy-saving transparent paint of the present embodiment has a composition in which an inorganic pigment, a binder resin, and a solvent, which are composed of nano-inorganic oxides having large thermal insulation properties, are mixed. Specifically, the inorganic pigment has a composition containing 0.5 to 25% by weight of the solvent and an extra binder resin of 10 to 30% by weight.

The inorganic pigment is a material having a function of blocking the heat, indium tin oxide (lTO) inorganic pigments having a particle size of about 80nm or less, inorganic tin oxide (ATO) inorganic pigments, aluminum zinc oxide (AZO) inorganic pigments, and the like. Include.

In particular, the lTO inorganic pigments are inorganic oxide nanoparticles having a particle size of about 10 to 80 nm, 20 to 50% solids, and In ₂ O ₃ and SnO ₂ in an 85:15 to 95: 5 ratio. ATO inorganic pigments are inorganic oxide nanoparticles having a particle size of about 10 to 80 nm, 20 to 50% solids, and containing SnO ₂ and Sb ₂ O ₄ in a ratio of 85:15 to 97: 3.

When the content of the inorganic pigment contained in the energy-saving transparent paint is less than 10% by weight, a problem that the heat shielding ability of the transparent coating formed of the paint is significantly lowered is caused. On the other hand, when the content of the inorganic material exceeds 30% by weight, the visible light transmittance of the transparent paint is lowered. Therefore, the energy-saving transparent paint contains 10 to 30% by weight of the nano inorganic pigment, preferably 15 to 25% by weight.

The solvent may use a hydrophilic or organic solvent depending on the type of the binder to improve the workability of the coating of the energy-saving transparent paint. Examples of the solvent include alcohols such as ethyl alcohol, methyl alcohol, butyl alcohol, and the like, acetates, aliphatic hydrocarbons, aromatic hydrocarbon alcohols, ketones, esters, glycols, and the like. These can be used individually or in mixture of 2 or more.

If the content of the solvent contained in the energy-saving transparent paint is less than 0.5% by weight, or more than 25% by weight may cause a problem that the painting workability using the paint is lowered due to storage problems. Therefore, the energy-saving transparent paint contains 0.5 to 25% by weight of the solvent, preferably 0.5 to 20% by weight. In the present embodiment, the amount of the solvent is limited, but the solvent may vary depending on the amount of the binder and the amount of the inorganic pigment, and does not exert a desired function for the purpose of the present invention.

The binder is a resin that is applied to form a transparent coating film containing the inorganic pigment on the object UV curable resins, acrylic resins (acryl resins), urethane resins (block isocyanate), silicone inorganic resins, silica sol resins, organic An inorganic hybrid resin etc. are mentioned. These can be used individually or in mixture of 2 or more. Particularly, the binder used in the present invention should use a transparent dry coating formed to have a minimum pencil hardness of 2H or more to prevent scratching of the coating and easy contamination and surface damage due to scratching.

When the content of the binder contained in the energy-saving transparent paint is less than a certain amount of adhesion and durability of the transparent coating film formed on the object is lowered, if the content is more than a certain amount of the amount of the inorganic pigment for solar heat blocking is reduced The problem is that the solar heat shielding effect, the heat shielding effect is significantly reduced.

In addition, the composition of the transparent paint according to the present invention may further include other additive components that have been conventionally used in the production of paint, and they do not particularly suggest the amount of use because they do not exert the desired function for the purpose of the present invention. . Examples of the other additives include a pigment wetting agent, a dispersing agent, an antifoaming agent, an antisettling agent, a film smoothing agent, a drying agent, a curing accelerator, a flow preventing agent, an electrical resistance regulator, a plasticizer and the like. These can mix and use at least 2 or more types.

Energy-saving transparent paints 2

Energy-saving transparent paint according to another embodiment of the present invention comprises 10 to 30% by weight of inorganic pigment 0.5 to 25% by weight solvent, 0.2 to 6% by weight of light absorbers (infrared absorbers, ultraviolet absorbers) and extra binder resin It may have a composition. Here, the description of the inorganic pigments, solvents, binders applied to the energy-saving transparent paint is omitted to avoid duplication, as described above.

In this case, examples of the light absorbent applied to the transparent paint include an infrared absorber, an ultraviolet absorber or a mixture thereof. These can be used individually or in mixture of 2 or more. Specifically, NIR dye, which is an infrared absorber among the light absorbers, may more reliably block light in the near infrared region from sunlight, thereby blocking the entire infrared wavelength region (750 to 2300 nm). In addition, the UV absorber, the ultraviolet absorber, serves to chemically stabilize the infrared absorber applied to the transparent paint while maintaining the UV blocking ability of the formed transparent coating 99% or more.

When the content of the light absorbing agent contained in the energy-saving transparent paint is less than 0.2% by weight, a problem of reducing the infrared or ultraviolet ray blocking ability of the formed transparent coating is caused. On the other hand, when the content of the light absorbent exceeds 6% by weight, the manufacturing cost of the paint is increased without improving infrared ray or ultraviolet ray blocking ability. Therefore, the energy-saving transparent paint contains 0.2 to 6% by weight of the light absorbing agent, preferably 0.5 to 4% by weight.

The transparent paint having the above-described composition has a complex function of transmitting infrared light and UV light at the same time by using a nano inorganic pigment having excellent visible light transmittance on the surface of the coating film, an infrared absorber (NIR DYE) and an ultraviolet absorber (TINUVIN). By having it, the transparent coating film which can obtain the solar heat blocking effect can be formed.

Energy-efficient transparent paints 3

Energy-saving transparent paint according to another embodiment of the present invention is 10 to 30% by weight of inorganic pigments 0.5 to 25% by weight solvent, 0.2 to 6% by weight of light absorbers (infrared absorbers, ultraviolet absorbers), pollution inhibitors (methyl silicate, Siloxane compound) and 0.1 to 4% by weight and an extra binder resin. Here, the description of the inorganic pigments, solvents, binders applied to the energy-saving transparent paint is omitted to avoid duplication, as described above.

The antifouling agent included in the energy-saving transparent paint is used to prevent surface contamination in order to ensure transparency of the transparent paint. As an example of the said antifouling agent, super hydrophilic methyl silicate, a siloxane compound, a mixture of these, etc. are mentioned.

When the content of the anti-pollution agent contained in the energy-saving transparent paint is less than 0.1% by weight, the self-cleaning ability of the formed transparent coating is significantly reduced, resulting in a problem that it is difficult to secure a continuous solar heat blocking effect and lightness due to contamination. do. On the other hand, when the content of the antifouling agent exceeds 4% by weight, the manufacturing cost of the paint is increased without improving the antifouling. Therefore, the energy-saving transparent paint contains 0.1 to 4% by weight of the antifouling agent, preferably 0.5 to 3% by weight.

Energy-saving transparent coating film formation

The energy-saving transparent coating film of the present invention may be formed by applying the above-described energy-saving transparent paint 1, 2 or 3 to the object and drying it.

Specifically, at least 10 to 30 weights of at least one inorganic pigment selected from the group consisting of indium tin oxide (lTO), antimony tin oxide (ATO) and aluminum zinc oxide (AZO) having an average particle size of 10 to 80 nm. An energy-saving transparent paint comprising%, solvent, 25-25% by weight, and excess binder resin is prepared.

Then, the energy-saving transparent paint is coated or applied to the surface of the object to be formed a transparent coating film. The object may include a window or glass window through which light is transmitted, and the coating may use a roller, a brush or a spray, a dripping coating, or the like.

Thereafter, the energy-saving transparent paint coated on the object is dried. As a result, an energy-saving transparent coating film is formed on the surface of the object, which has light transmittance and excellent heat blocking ability. The formed transparent coating film is formed by performing a drying process such as thermal curing, ultraviolet curing, or natural curing according to the binder type of the energy-saving transparent coating.

Hereinafter, the present invention will be described in more detail with reference to Examples, Comparative Examples and Evaluation Examples. However, the present invention is not limited by the following examples.

Example 1

Using an acrylic silicone resin mixed with an acryl binder, a block isocyanate, and a silane as a binder, an energy-saving non-polluting heat-shielding transparent paint of a small-type acryl silicone resin mixed in the component ratios shown in Table 1 was prepared.

TABLE 1

Example  2

To prepare a natural dry energy-saving non-polluting heat shield transparent paint mixed in the component ratios shown in Table 2 below.

TABLE 2

Example  3

To prepare a UV-curable energy-saving non-polluting heat shield transparent paint mixed in the component ratios shown in Table 3.

TABLE 3

Comparative example  One

To prepare a small-type acrylic silicone resin transparent paint mixed in the component ratios shown in Table 4.

TABLE 4

Comparative example  2

To prepare a natural dry transparent paint mixed in the component ratios shown in Table 5.

TABLE 5

Comparative example  3

To prepare a UV-curable transparent paint mixed in the component ratios shown in Table 6.

TABLE 6

Rain of coating Pollutant  evaluation

In order to evaluate the non-polluting effect, a carbon pollutant evaluation test showing a test result close to outdoor exposure pollution was conducted. The test conditions were 20 cm X 30 cm in width and length, respectively, and the glass plates of Examples 1 to 3 and Comparative Examples 1 to 3 were coated to dry thickness of 30 μm on a glass plate having a thickness of 1.0 mm, and then dried. 10% carbon black aqueous solution dispersed in was sprayed with air spray and left at 40 ° C. for 1 hour, and then washed with a soapy water and a cleaning sponge to dry the contaminated areas, and then the color difference between the initial coating film was confirmed. The results are shown in Table 7 below.

TABLE 7

Referring to the results disclosed in Table 7, it was confirmed that the coating film formed of the transparent paints of Examples 1 to 3 had almost no color change compared to the comparative example, and thus the transparent paint of the present invention formed a coating film having non-polluting properties. can do.

Evaluate sun protection and insulation

Insulating boxes of 30 cm in width, height, and height, respectively, were opened from a 1 cm thick wooden board, and the inside of the box was given a 5 cm thick styrofoam to give a heat insulating function. At the top of this box, the specimen prepared for the comparative test of non-pollution effect is sealed to prevent the outside air from circulating, and two infrared lamps having a similar effect to the sunlight wavelength are irradiated over time at the upper 40 cm of the specimen. The change in the room temperature of the back side (inside surface) of the specimen was measured. The results are shown in Table 8 below. At this time, the infrared lamp was used as an OSRAM company, E27 screw base, 250W, 127.5 (D) * 185 (L) mm, 300 ~ 3000 nm wavelength lamp.

TABLE 8

Looking at the results disclosed in Table 8, the coating film formed of the transparent paints of Examples 1 to 3 was confirmed that the internal temperature change is not large with the change of time compared to the coating film of the comparative example bar transparent paint of the present invention is heat shielding and thermal insulation The coating film which is excellent in an effect can be formed.

Comparative evaluation of infrared and visible light transmittance

The test conditions were 20 cm X 30 cm in width and length, respectively, and the specimens formed by coating the paints of Examples 1 to 3 and Comparative Examples 1 to 3 on a glass substrate having a thickness of 1.0 mm to have a dry coating thickness of 30 μm. Infrared and visible light were irradiated to each and then transmittance and reflectance were measured. The results are shown in Table 9 below.

TABLE 9

Looking at the results disclosed in Table 9, it can be seen that the coating film formed of the transparent paints of Examples 1 to 3 has an infrared reflectance of 60% or more and a visible light transmittance of 73% or more and has an excellent effect on blocking the infrared light.

As described above, the energy-saving transparent paint containing the nano-inorganic pigment is not only excellent in the solar heat shielding effect compared to the existing heat shielding paint, but also excellent in heat insulation and contamination resistance. For this reason, the transparent coating film formed of the paint can effectively maintain the long-term excellent solar heat shielding and thermal insulation effect even in the outdoors directly exposed to sunlight compared to the performance degradation caused by the pollution. As a result, the transparent paint of the present invention can exhibit excellent performance for a long time by applying to various buildings, facilities, facilities, parts, etc. that require the blocking of sunlight.

Claims (5)

10 to 30% by weight of at least one inorganic pigment selected from the group consisting of indium tin oxide (lTO), antimony tin oxide (ATO) and aluminum zinc oxide (AZO) having an average particle size of 10 to 80 nm; Solvent 0.5 to 25% by weight; And Energy-saving transparent paint containing extra binder resin. According to claim 1, wherein the lTO inorganic pigment is an inorganic oxide nanoparticles containing 20 to 50% solids and In ₂ O ₃ and SnO ₂ in a ratio of 85: 15 to 95: 5, the ATO inorganic pigments 20 to 20 solids. Energy-saving transparent paint, characterized in that 50% and the inorganic oxide nanoparticles containing SnO ₂ and Sb ₂ O ₄ in a ratio of 85:15 to 97: 3. 10 to 30% by weight of at least one inorganic pigment selected from the group consisting of indium tin oxide (lTO), antimony tin oxide (ATO) and aluminum zinc oxide (AZO) having an average particle size of 10 to 80 nm; 0.2 to 6% by weight of an infrared absorber, ultraviolet absorbent or mixtures thereof; Solvent 0.5 to 25% by weight; And An energy-saving transparent paint comprising at least one binder resin selected from the group consisting of UV curable resins, acrylic silicone resins, urethane resin silicone inorganic resins, silica sol resins, and organic inorganic hybrid resins. 10 to 30% by weight of at least one inorganic pigment selected from the group consisting of indium tin oxide (lTO), antimony tin oxide (ATO) and aluminum zinc oxide (AZO) having an average particle size of 10 to 80 nm; 0.2 to 6% by weight of an infrared absorber, ultraviolet absorbent or mixtures thereof; Solvent 0.5 to 25% by weight; 0.1 to 4% by weight of methyl-silicate, siloxane compounds or mixtures thereof; And An energy-saving transparent paint comprising at least one binder resin selected from the group consisting of UV curable resins, acrylic silicone resins, urethane resin silicone inorganic resins, silica sol resins, and organic inorganic hybrid resins. 10-30 wt% of at least one inorganic pigment selected from the group consisting of indium tin oxide (lTO), antimony tin oxide (ATO) and aluminum zinc oxide (AZO) having an average particle size of 10 to 80 nm and 0.5 to 25 wt% of a solvent Applying an energy saving transparent paint comprising% and excess binder resin on the object; And Forming an energy-saving transparent coating film by drying the energy-saving transparent coating applied on the object to form an energy-saving transparent coating film.