KR101599677B1 - Glass coating composition having ultraviolet and infrared blocking and glass coating method using the same - Google Patents

Abstract

The present invention relates to a glass coating composition having a function of blocking ultraviolet and infrared rays, and a glass coating method using the same. More particularly, the present invention relates to: a glass coating composition having a function of blocking ultraviolet and infrared rays, which uses a core-shell structure composed of nanosilica and nano-metal oxide as heat-blocking nanopowder having a function of blocking infrared and ultraviolet rays and can improve physical properties such as weather resistance, adhesive strength, etc.; and a glass coating method using the same. The glass coating composition comprises, based on 100 parts by weight of a binder: 10 to 30 parts by weight of a curing agent; and 20 to 40 parts by weight of heat-blocking nanopowder. The heat-blocking nanopowder comprises nanosilica and at least one nano-metal oxide selected from the group consisting of tin oxide, tungsten oxide, antimony-doped tin oxide, indium tin oxide, aluminum zinc oxide, and cesium tungsten oxide.

Description

[0001] The present invention relates to a glass coating composition having ultraviolet (UV) and infrared (IR) blocking properties and a glass coating composition using the same.

The present invention relates to a glass coating composition having an ultraviolet (UV) and infrared ray blocking function and a glass coating method using the same, and more particularly, to a glass coating composition having an ultraviolet Structure capable of improving physical properties such as abrasion resistance (scratch resistance) and adhesion strength, and a glass coating method using the composition.

The energy loss of buildings occurs through walls, roofs, and windows. Among them, the heat loss through the window is reported to be about 20 to 40%. Recently, high-rise buildings, residential houses, and apartments have been using glass windows all over the building as exterior materials. Therefore, in order to save the energy of the building, the heat loss through the window must be reduced. In order to maximize the energy saving, a method of shutting off hot solar rays in summer is being used by using an optical special glass, that is, LOW-E glass. Roy glass is a glass coated with a special metal film (usually Ag and SiO) with a high infrared reflectance inside the general glass by sputtering processing and CVD (chemical vapor deposition) coating method. Glass that enhances the insulation performance of a building Is being used, and the amount of use is increasing.

The special metal film is an energy-saving glass that transmits the visible light to increase the light-emitting property of the room, and reflects the infrared light to minimize the movement of indoor and outdoor heat, thereby reducing the temperature change in the room. In particular, the Roy multilayer glass is coated with a special metal film having excellent heat insulation effect on the plate glass, resulting in a high-thermal-insulating multilayer glass. In addition to the heat insulation performance, it has an excellent noise shielding effect and is capable of expressing various colors.

However, the LOW-E glass does not have an infrared shielding effect and blocks outflow of radiated long-wave radiant heat from the room due to the effect of long-wave reflection of the heat ray. Therefore, the room temperature rises, The high cost of glass is due to the increase in energy consumption and the use of expensive equipment for sputtering processing coating and chemical vapor deposition (CVD) coating in the coating method.

In addition, a heat-shielding film using infrared reflective nano-oxide has been developed, and the heat-shielding film has an excellent effect of blocking infrared rays compared to conventional glass, thereby saving energy consumption by reducing cooling load in summer. However, such a heat-shrinkable film has an effect at an early stage, but with the lapse of time, the durability of the film deteriorates, resulting in discoloration or exfoliation, resulting in deterioration of the appearance and a sudden drop in the function of blocking infrared rays. In addition, there is a limitation that the maximum size of the heat shield film is about 1.5 ~ 1.8m wide and can not be applied to large windows.

1. Korean Patent No. 10-1308040 2. Korean Patent No. 10-1470356 3. Korean Patent Publication No. 10-2009-0093128

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a method of manufacturing a heat-shielding nano-powder using a core-shell structure composed of nanosilica and nano- And to provide a glass coating composition having an ultraviolet ray and an infrared ray blocking function capable of improving physical properties such as abrasion resistance (scratch resistance) and adhesive strength, and a glass coating method using the composition.

In order to achieve the above object, the glass coating composition having an ultraviolet ray blocking function and an infrared ray blocking function according to the present invention comprises 10 to 30 parts by weight of a curing agent and 20 to 40 parts by weight of a heat-resistant nano powder based on 100 parts by weight of a binder, The nanostructured powder may be at least one selected from the group consisting of tin oxide, tungsten oxide, antimony-doped tin oxide (ATO), indium tin oxide (ITO), aluminum zinc oxide AZO), cesium tungsten oxide (CTO), and the like; And nano silica.

In addition, the nano-powder of a thermal barrier of a glass coating composition having an ultraviolet ray blocking function and an infrared ray blocking function according to the present invention forms a shell in which the nano-metal oxide is formed as a core and the nano- And has a core-shell structure.

In addition, the binder of the glass coating composition having an ultraviolet ray blocking function and an infrared ray blocking function according to the present invention comprises 10 to 30 parts by weight of glutaric acid, 5 to 20 parts by weight of an acrylic resin, 10 to 30 parts by weight of ethylene glycol monobutyl ether acetate, 10 to 30 parts by weight of beta-hydroxyethyl methyl ether, and 5 to 20 parts by weight of cresol.

In addition, the curing agent of the glass coating composition having an ultraviolet and infrared ray blocking function according to the present invention may comprise 70 to 90 parts by weight of 1,6-hexamethylene diisocyanate homopolymer, 10 to 10 parts by weight of glutaric acid, 30 parts by weight.

In addition, the glass coating method using the glass coating composition according to the present invention includes the steps of removing foreign matters on the glass surface by applying an oil film remover; Applying a primer to the glass surface from which the foreign substance has been removed; Applying the glass coating composition of claims 1 to 4 to a glass surface to which the primer is applied;

And drying and curing the glass coating composition.

Also, in the glass coating method using the glass coating composition according to the present invention, the oil film remover is characterized by comprising 10 to 30 parts by weight of aluminum oxide, 70 to 80 parts by weight of water, and 1 to 5 parts by weight of a dispersing agent.

In the glass coating method using the glass coating composition according to the present invention, 70 to 85 parts by weight of ethanol, 15 to 25 parts by weight of isopropyl alcohol, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane 1 to 2 parts by weight.

According to the glass coating composition having an ultraviolet and infrared ray shielding function proposed in the present invention and a glass coating method using the same, it is possible to form a core-shell structure composed of nanosilica and nano-metal oxide, , There is an effect that the physical properties such as abrasion resistance (scratch resistance) and adhesive strength can be improved.

1 is a block diagram showing each step of a glass coating method using a glass coating composition according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the terms described below are defined in consideration of the functions of the present invention, and these may vary depending on the intention of the user, the operator, or the precedent. Therefore, the definition should be based on the contents throughout this specification.

The glass coating composition having an ultraviolet ray blocking function and an infrared ray blocking function according to the present invention improves durability while having heat insulation or heat shielding effect and includes a binder, a curing agent, and a heat shielding nano powder.

Specifically, the glass coating composition having excellent ultraviolet and infrared ray shielding properties according to the present invention having excellent durability is composed of 10 to 30 parts by weight of a curing agent and 20 to 40 parts by weight of a thermal barrier nano powder based on 100 parts by weight of a binder.

The binder provides adhesion and stain resistance. The binder contains 10 to 30 parts by weight of glutaric acid, 5 to 20 parts by weight of an acrylic resin, 10 to 30 parts by weight of ethylene glycol monobutyl ether acetate, 10 to 30 parts by weight of methyl ether (β-hydroxyethyl methyl ether) and 5 to 20 parts by weight of cresol.

In the binder, the glutaric acid and the acrylic resin act as a binder resin, the beta hydroxyethyl-methyl ether acts as a solvent, the cresol acts as an ultraviolet screening agent, and the ethylene glycol monobutyl ether acetate acts as a leveling agent.

In the present invention, it may be composed of a liquid coating resin containing 10 to 30 parts by weight of a curing agent based on 100 parts by weight of the binder.

When the amount of the curing agent is less than 10 parts by weight, the curing time is delayed, and foreign matters such as dust are excessively adhered to the surface of the coating layer during the curing process over a long period of time. When the amount exceeds 30 parts by weight, It is preferable to limit the content of the curing agent to 10 to 30 parts by weight because there is a problem that the adhesive strength is lowered because the relative content of the resin, specifically the acrylic resin, is reduced.

The curing agent is exemplified by 70 to 90 parts by weight of 1,6-hexamethylene diisocyanate homopolymer and 10 to 30 parts by weight of glutaric acid.

The thermal barrier nano powder has a first function for providing an infrared ray shielding capability and an ultraviolet ray shielding capability, and a second function for improving the durability of the coating layer.

In order to achieve the first function, the thermal oxide nanopowder may include tin oxide, tungsten oxide, antimony-doped tin oxide (ATO), indium tin oxide (ITO) ), At least one nano-metal oxide selected from the group consisting of aluminum zinc oxide (AZO), cesium tungsten oxide (CTO), and nanosilica .

If the amount is less than 20 parts by weight, it is difficult to exhibit infrared and ultraviolet ray shielding performance. If the amount is more than 40 parts by weight, the transmittance of the visible light ray Because it is sharply lowered.

It is preferable that the thermal oxide nanopowder has a core-shell structure in which the nano-metal oxide is formed as a core and the outer surface of the nanoparticle has a mesoporous shell surrounding the nanosilica.

If the nano-metal oxide and the nanosilica are simply mixed, the transmittance and transparency of the visible light are lowered. However, when they are composed of the core-shell structure, the transmittance and the transparency of the coating layer are not reduced, . By adding the nano silica, the thermal conductivity can be lowered to maximize the heat insulating effect, and the effect of absorbing a part of infrared rays and ultraviolet rays can be expected.

On the other hand, the nanosilica has a structure surrounding the core of the nano-metal oxide. Since the nanosilica has a mesoporous structure, a considerable amount of infrared rays and ultraviolet rays can be supplied as the nano-metal oxide inside.

Generally, methods for preparing core-shell structure particles include imprinting method, associate phase seperation, coaxial electrospraying, aerosol-assisted self- assembly, and the like. However, the heat-generating endothermic powder of the present invention can be produced by a self-assembly method using an aerosol.

Specifically, the self-assembly method using the aerosol uses tetraethyl orthosilicate and methyltriethoxysilane as precursors of nanosilica, cetyltrimethylammonium bromide as a surfactant, tin oxide as a nano metal oxide, and a mixture of ethylene and water as a solvent Solution, and then aerosol droplets are made using a spraying device, and these are dried and calcined to remove the surfactant.

Hereinafter, a glass coating method using the glass coating composition according to the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing each step of a glass coating method using a glass coating composition according to the present invention.

Referring to FIG. 1, the glass coating method using the glass coating composition according to the present invention includes a step S1 of removing foreign substances on the glass surface by applying an oil film remover, a step S2 of applying a primer to the surface of the glass on which the foreign substance is removed, A step S3 of applying a glass coating composition to the glass surface to which the primer is applied, and a step S4 of drying and curing the glass coating composition.

In the step S1, the oil film remover may include 10 to 30 parts by weight of aluminum oxide, 70 to 80 parts by weight of water, and 1 to 5 parts by weight of a dispersing agent. Here, the dispersant may be exemplified by 2-2-2-methoxyethoxy ethoxy acetic acid.

Specifically, in the step S1, the oil film remover is immersed in a sponge soaked with water, and is uniformly coated on the surface of the glass, followed by washing with water, and removing the water with a dry towel or the like.

The primer of step S2 is a primer for pretreating the glass surface to increase the adhesive strength of the glass coating composition in step S3, and comprises 70 to 85 parts by weight of ethanol, 15 to 25 parts by weight of isopropyl alcohol, 1 to 2 parts by weight of silane coupling agents By weight may be exemplified. The silane coupling agent may be N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, but is not limited thereto.

In the step S3, the glass coating composition is applied in a state that the primer is completely cured. Since the glass coating composition is composed of a two-component type resin comprising a binder and a curing agent as described above, the binder and the curing agent are mixed at a ratio of 1: By weight, and then mixed with the heat-resistant nano powder. The prepared glass coating composition is applied to the glass surface using a sponge, a spray device, a roller, or the like to form a coating layer.

Finally, in step S4, the coating layer is naturally dried at 10 to 30 DEG C for 30 to 60 minutes, and then completely dried for 10 to 30 days.

Hereinafter, preferred embodiments of the glass coating method using the glass coating composition according to the present invention will be described in more detail.

20 parts by weight of glutaric acid, 10 parts by weight of an acrylic resin, 15 parts by weight of ethylene glycol monobutyl ether acetate, 20 parts by weight of? -Hydroxyethyl methyl ether, and 5 parts by weight of cresol , 85 parts by weight of hexane 16-diisocyanate homopolymer, and 15 parts by weight of glutaric acid were provided on the surface of the core, and a self-assembly method using an aerosol was used to prepare a core - Provide shell nano powder with shell structure, using nano tin oxide as core and mesoporous nano silica as shell. 15 parts by weight of a curing agent and 20 parts by weight of a heat-resistant nano powder were mixed and stirred in 100 parts by weight of the binder to prepare a glass coating composition.

[Comparative Example 1]

A glass coating composition was prepared in the same manner as in Example 1, except that the heat-treated nano-powder in Example 1 was changed to tin oxide and the core-shell structure of the nanosilica was not used.

[Comparative Example 2]

In Example 1, the heat-treated nano-powder was prepared by mixing indium tin oxide (ITO) and cesium tungsten oxide (CTO) in a weight ratio of 1: 2, A glass coating composition was prepared in the same manner as in Example 1, except that

[Experimental Example 1]

S1  step

15 parts by weight of aluminum, 80 parts by weight of water and 3 parts by weight of 2-2-2-methoxyethoxy ethoxy acetic acid as a dispersing agent were prepared, When the sponge is wetted with water, the glass surface is washed with an oil film remover, sprinkled with water, and the glass surface is dried. Here, a glass substrate having a width of 20 cm x 30 cm and a thickness of 2.0 mm was used.

S2  step

75 parts by weight of ethanol, 15 parts by weight of isopropyl alcohol and 1 part by weight of N-2- (aminoethyl) -3-aminopropyltrimethoxysilane were applied to the glass surface, Dry.

S3 , S4  step

The glass coating composition prepared in Example 1 was coated on a glass surface and then dried at room temperature.

[Experimental Example 2]

In Experimental Example 1, the glass coating composition prepared in Comparative Example 1 was coated on the glass surface and then coated in the same manner except that the glass coating composition was dried at room temperature.

[Experimental Example 3]

In Experimental Example 1, the glass coating composition prepared in Comparative Example 2 was coated on the glass surface and then coated in the same manner except that the glass coating composition was dried at room temperature.

[Property evaluation]

The adhesion strength among the physical properties of the coating layer prepared according to the composition prepared according to Example 1 and Comparative Examples 1 and 2 was tested in accordance with KS M 3723. The scratch resistance was evaluated by applying a load of 2 kg to a steel cap- , And visible light transmittance (%), infrared ray blocking rate (%), and ultraviolet light blocking ratio as optical characteristics are shown in Table 1 below.

Example 1 Comparative Example 1 Comparative Example 1 Adhesive strength (MPa) 2.21 1.95 1.88 My Scratchy Castle Great Bad Bad Visible light transmittance (%) 78 65 67 Infrared blocking rate (%) 82 73 77 UV protection rate (%) 99 89 91

As can be seen from the above Table 1, it can be confirmed that when coated with the glass coating composition according to Example 1 of the present invention, the adhesive strength and scratch resistance are excellent. It was also confirmed that the optical properties were also superior to those of the glass coating compositions of Comparative Examples 1 and 2.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims (7)

10 to 30 parts by weight of a curing agent based on 100 parts by weight of the binder, and 20 to 40 parts by weight of heat-resistant nano powder,
The heat-generating nanopowder may be a single-
Tin oxide, tin oxide, antimony-doped tin oxide (ATO), indium tin oxide (ITO), aluminum zinc oxide (AZO), cesium At least one nano-metal oxide selected from the group consisting of tungsten oxide (CTO);
Nano silica;
Wherein the binder comprises:
10-30 parts by weight of glutaric acid, 5-20 parts by weight of an acrylic resin, 10-30 parts by weight of ethylene glycol monobutyl ether acetate, 10-30 parts by weight of? -Hydroxyethyl methyl ether And 5 to 20 parts by weight of cresol.
The method according to claim 1,
Wherein the heat-resistant nanopowder has a core-shell structure in which the nano-metal oxide is formed as a core and the nanosilica having a mesoporous structure is formed as a shell surrounding the nanoparticle oxide. ≪ / RTI >
delete The method according to claim 1,
The curing agent,
A glass coating composition having an ultraviolet ray blocking function and an infrared ray blocking function, characterized by comprising 70 to 90 parts by weight of 1,6-hexamethylene diisocyanate homopolymer and 10 to 30 parts by weight of glutaric acid.
Removing foreign matters on the glass surface using an oil film remover;
Applying a primer to the glass surface from which the foreign substance has been removed;
Applying the glass coating composition of claim 1 to a glass surface to which the primer is applied;
Drying and curing the glass coating composition,
The oil film-
10 to 30 parts by weight of aluminum oxide powder, 70 to 80 parts by weight of water, and 1 to 5 parts by weight of a dispersing agent.
delete 6. The method of claim 5,
The above-
70 to 85 parts by weight of ethanol, 15 to 25 parts by weight of isopropyl alcohol, and 1 to 2 parts by weight of a silane coupling agent.

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