KR20190067031A - Matt gray coating, matt gray coating glass and insulated glazing - Google Patents

Abstract

The present invention relates to a matte gray coating with low transmittance and low reflectance performance. The matte gray coating gradually comprises a first low absorption spacing layer, a first high absorption reflection layer, a second low absorption spacing layer, a second high absorption reflection layer, and a third low absorption spacing layer, wherein the first high absorption reflection layer and the second high absorption reflection layer have an extinction coefficient of at least 1, and the first low absorption spacing layer, the second low absorption spacing layer, and the third low absorption spacing layer have the extinction coefficient of 0.5 or less.

Description

MATT GRAY COATING, MATT GRAY COATING GLASS AND INSULATED GLAZING BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

Matte gray coating, matte gray coated glass and double layer glass.

Commercial buildings are mainly constructed using colored glass. This is to reduce the cooling load by minimizing the external thermal energy by reducing the aesthetic reason and permeability. Therefore, in order to reduce the transmittance, the glass is produced with a color, which is realized in various colors through a disc or a coating.

The implementation of color in the disc glass varies depending on the materials used and the mixing ratio. There are blue, green, brown, and gray discs which are mainly used for color glass discs, and gray discs are the most demanded in the construction market. This is the result of meeting the demand of the market that expresses the luxury of the building with the neutral gray series glass.

However, there are no companies that can produce such color glass discs, and most of them depend on imports. In case of transferring a color glass disc through import, it is difficult to control quality because it can cause corrosion of glass depending on the exposure environment. Also, low-radiated coated glass, which is well-known in the market for coated glass, implements color through a complicated film structure, but because it can not keep up with the natural color of the colored glass plate, it imports a color glass plate, Are being sold.

One embodiment of the present invention provides a gray matte gray coating with low transmittance, low reflectance performance.

Another embodiment of the present invention provides a matte gray coating having a low solar heat acquisition rate.

Another embodiment of the present invention provides a matte gray coated glass using the matte gray coating.

Another embodiment of the present invention provides a multi-layered glass using the matte gray coated glass.

In one embodiment of the invention,

A first high absorption absorption layer, a first high absorption absorption reflection layer, a second low absorption absorption layer, a second high absorption reflection layer and a third low absorption absorption layer,

Wherein the first high absorption reflection layer and the second high absorption reflection layer have an extinction coefficient of at least 1,

The first low absorbing spacing layer, the second low absorbing spacing layer and the third low absorbing spacing layer provide a matte gray coating having an extinction coefficient of 0.5 or less.

In another embodiment of the present invention, there is provided a matte gray coated glass comprising a transparent glass substrate and the matte gray coating, wherein the first low absorption spacing layer is laminated so as to be in contact with the transparent glass substrate.

In another embodiment of the present invention, the matte gray coating comprises an inner transparent glass substrate and an outer transparent glass substrate spaced apart from the inner transparent glass substrate and coated on the inner surface of the outer transparent glass substrate, And a first low absorption gap layer is in contact with the inner side surface of the outer transparent glass substrate.

The matte gray coating is applied to a transparent glass substrate as a coating layer to realize a matte gray and realize a low solar heat acquisition rate. In addition, the matte gray coating can additionally lower the emissivity, thereby reducing the heat conduction rate.

Figure 1 is a schematic cross-sectional view of a matte gray coating according to one embodiment of the present invention.
Figure 2 is a schematic cross-sectional view of a matte gray coating according to another embodiment of the present invention.
3 is a schematic cross-sectional view of a matte gray coated glass according to another embodiment of the present invention.
4 is a schematic cross-sectional view of a matte gray coated glass according to another embodiment of the present invention.
5 is a schematic cross-sectional view of a multi-layered glass according to another embodiment of the present invention.
6 is a schematic cross-sectional view of a multi-layered glass according to another embodiment of the present invention.
7 is a schematic cross-sectional view of a multi-layered glass according to another embodiment of the present invention.
8 is a graph showing a comparison of the heat conduction ratio of the double-layered glass of Example 2 with that of the gray glass disc of Comparative Example 1-3.
9 is a graph showing the solar heat acquisition rate of the double-layered glass of Example 2 compared with the gray glass disc of Comparative Example 1-3.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

In the drawings, the thickness is enlarged to clearly represent the layers and regions. In the drawings, for the convenience of explanation, the thicknesses of some layers and regions are exaggerated.

Hereinafter, the formation of any structure in the "upper (or lower)" or the "upper (or lower)" of the substrate means that any structure is formed in contact with the upper surface (or lower surface) of the substrate However, the present invention is not limited to not including other configurations between the substrate and any structure formed on (or under) the substrate.

In one embodiment of the present invention, the liquid crystal display device includes a first low absorption spacer layer, a first high absorption reflection layer, a second low absorption spacer layer, a second high absorption reflection layer and a third low absorption spacer layer sequentially, Absorptive reflective layer and the second high absorptive reflective layer have an extinction coefficient of at least 1 and the first low-absorption spacer layer, the second low-absorption spacer layer and the third low-absorption spacer layer have a light- to provide.

1 is a cross-sectional view of a matte gray coating 10 according to one embodiment of the present invention. The matte gray coating 10 comprises a first low absorption spacer layer 11, a first high absorption reflection layer 21, a second low absorption spacer layer 12, a second high absorption reflection layer 22, And a spacing layer 13 in this order.

As shown in FIG. 1, the first low absorption absorption layer 11, the first high absorption absorption layer 21, the second low absorption absorption layer 12, the second high absorption absorption reflection layer 22, (13) may be formed in contact with each other.

The matte gray coating 10 achieves low transmittance and low reflectance performance, thereby achieving a matte gray.

The matte gray coating 10 can effectively achieve gray while being matt. Thus, the matte gray coating 10 can be used as a color glass.

The matte gray coating 10 exhibits a low transmittance to sunlight, and a privacy protection effect can be obtained.

The matte gray coating 10 exhibits a low reflectance against sunlight and can prevent light pollution.

In addition, the matte gray coating 10 is excellent in heat insulation performance because it can achieve a low emissivity to sunlight while realizing matte gray. A low emissivity results in a low heat conduction rate and is excellent in heat insulation effect. The heat conduction rate indicates how much heat energy passes per unit area.

Further, since the matte gray coating 10 satisfies a low transmittance and a low emissivity while achieving a matte gray, the heat input and output become low, and the acquisition rate for sunlight also becomes low. When a low acquisition rate is exhibited, the shielding effect becomes excellent. The solar light acquisition rate is the ratio of sunlight passing through a window such as a glass to the room, and is the sum of the heat ray transmittance and the ratio of the energy absorbed by windows such as glass and re-emitted into the room. The lower the value, the smaller the amount of heat energy flowing into the room.

Thus, the matte gray coating 10 may be suitable as a glass for commercial use because it satisfies a low acquisition rate, a low transmittance, and a low reflectance while realizing a matte gray.

Hereinafter, each layer of the matte gray coating will be described in detail.

The first and second high absorption and reflection layers 21 and 22 are formed of a material having an extinction coefficient of 1 or more, specifically, a material having an extinction coefficient of 1 or more. For example, the first highly absorbent reflective layer 21 and the second highly absorbent reflective layer 22 may each include one selected from the group consisting of Ni, Ti, Cr, Al, and combinations thereof. The extinction coefficient is a measure of the extent to which light is absorbed, usually a monochromatic light with a constant wavelength, and is typically the value at a wavelength of 550 nm. For example, the extinction coefficient of NiCr at 550 nm is about 3.6.

For example, the first highly absorbent reflective layer 21 and the second highly absorbent reflective layer 22 may be NiCr layers.

The first low absorption absorption gap layer 11, the second low absorption absorption gap layer 12 and the third low absorption absorption gap layer 13 are formed of a material having an extinction coefficient of 0.5 or less, specifically 0.0 to 0.5 Al, Zn, Sn, Ti, Ti, and the like, for example, the first low absorptive spacing layer 11, the second low absorptive spacing layer 12 and the third low absorptive spacing layer 13, Oxide, or oxynitride of a four-component system or less including one selected from the group consisting of a combination of oxides and oxides.

For example, the first low absorption spacing layer 11, the second low absorption spacing layer 12 and the third low absorption spacing layer 13 may be Si-doped with Al.

The matte gray coating 10 is formed by dividing two layers of the first and second high absorption and reflection layers 21 and 22 and sandwiching the third low absorption gap layer 13 therebetween The light is trapped in the third low-absorption gap layer 13.

The first and second high absorption and reflection layers 21 and 22 are metal layers that can lower the transmittance but absorb a large amount of light energy because of high absorption coefficient. Thus, increasing the thickness results in a decrease in transmittance, while an increase in reflectance. As the reflectance increases in buildings, it causes glare on drivers and surrounding buildings driving according to the angle, causing accidents or inconvenience. The first and second high absorption and reflection layers 21 and 22 may have appropriate thicknesses and thickness ratios to provide low transmittance and low reflectance.

The first highly absorbent reflective layer 21 may be formed to a thickness of 3 nm to 5 nm.

The thickness ratio of the first highly absorbent reflective layer 21 to the second highly absorbent reflective layer 22 may be 1: 1.1 to 2.0.

By applying the first and second high absorption and reflection layers 21 and 22 as a thin film of the metal layer, the emissivity can be lowered, the heat conduction rate can be lowered (the heat insulating effect is improved) It is possible to realize a value equal to or lower than that of a commercially available gray glass plate.

The thickness ratio of the first low absorption spacer layer 11 to the second low absorption spacer layer 12 to the third low absorption spacer layer 13 may be from 1: 1.6 to 2.0: 1.1 to 1.5.

The first low absorption spacer layer 11 may be formed to a thickness of 4 nm to 50 nm.

By adjusting the thickness of each layer of the matte gray coating 10 to realize a low transmittance and a low reflectance, the matte gray can be effectively realized.

In one embodiment, the matte gray coating 10 has a transmittance of 30% or less of light passing through the first low absorption spacer layer 11 in the direction of the third low absorption spacer layer 13, specifically 30 To 20%, a reflectance of 10% or less, specifically 10% to 3%, and a corrected emissivity of 0.87 or less, specifically 0.50 to 0.87, more specifically 0.60 to 0.87. Emissivity is generally expressed as 1 on the basis of a black body, and since the incident light has a hemispherical shape, it is denoted by a corrected emissivity.

2 is a cross-sectional view of a matte gray coating 20 according to another embodiment of the present invention. The matte gray coating 20 may additionally comprise a top protective layer 16 on top of the third low absorption spacing layer 13.

Since the matte gray coating 20 is not vulnerable to oxidation, the top protective layer 16 is not necessary. Therefore, even when the uppermost protective layer 16 is formed, it is formed to have a thickness of 3 nm or less.

When the matte gray coating 10 is exposed to the atmosphere, corrosion and oxidation may occur in the long term. In order to solve this problem, the matte gray coating 20 may form a top protective layer 16 on top of the third low absorption spacer layer 13. That is, the uppermost protective layer 16 may protect the matte gray coating 20 from being corroded and oxidized in the long term.

The uppermost protective layer 16 may include at least one selected from the group consisting of an alloy including zirconium such as zirconium and silicon zirconium, a metal oxide, a metal nitride, a metal oxynitride, and a combination thereof, or the zirconium, the zirconium (Bi), boron (B), aluminum (Al), silicon (Si), magnesium (Mg), antimony (Sb), beryllium (Be), and a combination thereof, may be included.

In another embodiment of the present invention, a transparent glass substrate 50 and the matte gray coating 10, 20 are laminated such that the first low absorption spacer layer 11 is in contact with the transparent glass substrate 50 Coated matte gray coated glass.

3 is a cross-sectional view of a matte gray coated glass 100 according to another embodiment of the present invention.

In one embodiment, the color index a * of the visible light reflection color of the other side of the transparent glass substrate 50 on which the matte gray coating is not formed is measured by a color difference meter to be -4 to 1, The b * value may be -4 to 1. The range of the color index value means that a gray of a neutral color series is implemented.

The transparent glass substrate 50 may be a transparent substrate having a high visible light transmittance, for example, a glass or transparent plastic substrate having a visible light transmittance of about 80% to about 100%. The transparent glass substrate 50 can be, for example, glass used for construction, without limitation, and can be, for example, about 2 mm to about 12 mm thick, But is not limited thereto.

4 is a cross-sectional view of a matte gray coated glass 200 according to another embodiment of the present invention. In FIG. 4, the matte gray coated glass 200 includes a transparent glass substrate 50 and a matte gray coating 20 of FIG.

The glass surface reflectance of the matte gray coated glass 100, 200 may be 10% or less, specifically 3% to 10%. The matte gray coated glass (100, 200) is implemented in a matte gray rather than a silver silver color by implementing a low reflectance such as the above range.

In order to manufacture the matte gray coated glass sheets 100 and 200, first, the transparent glass substrate 50 may be prepared, and then the layers of the matte gray coating sheets 10 and 20 may be sequentially formed. Each layer of the matte gray coating 10, 20 may be formed according to known methods in a manner suitable for achieving the desired properties.

For example, the first low absorption absorption layer 11, the first high absorption absorption layer 21, the second low absorption absorption layer 12, the second high absorption absorption reflection layer 22, the third low absorption absorption layer 13 And the uppermost protective layer 16 may be formed by sputtering or the like.

In another embodiment of the present invention,

A first low absorption spacer layer (11) comprising an inner transparent glass substrate and an outer transparent glass substrate spaced apart from the inner transparent glass substrate, the non-light gray coating coated on an inner surface of the outer transparent glass substrate, Layered glass so as to contact the inner surface of the outer transparent glass substrate.

5 is a cross-sectional view of a multi-layered glass 1000 according to another embodiment of the present invention.

The multilayer glass 1000 is formed by spacing the outer transparent glass substrate 51 and the inner transparent glass substrate 52 and is formed on the inner surface of the outer transparent glass substrate 51, A gray coating 10 is formed.

When the matte gray coating 10 is exposed to the atmosphere, corrosion and oxidation may occur over a long period of time. However, the spacing space A may be sealed to prevent the matte gray coating 10 from being corroded or oxidized. Also, the spacing space A may be sealed to prevent heat loss due to convection and conduction.

The space A may be filled with a gas such as vacuum, argon, krypton, or the like, but the present invention is not limited thereto.

In another embodiment, the heat transfer rate of the multilayer glass 1000 is from 2.50 to 2.80 when the heat transmission rate is [5mm matte gray coated glass (# 2 side coated) + 12mm general air layer + 5mm glass], solar heat acquisition rate is 0.25 to 0.40 .

6 is a cross-sectional view of a multi-layered glass 2000 according to another embodiment of the present invention.

6, the double-layered glass 2000 has a low radiation coating 40 formed on the inner side of the inner transparent glass substrate 52, that is, in the space A. By forming the low emissivity coating (40) together to face the matte gray coating (10) in the spacing space (A), the shielding performance and the heat insulating performance can be further improved.

7 is a cross-sectional view of a multi-layer glass 1000 according to another embodiment. 7, solar light incident from the outer side (out) to the inner side (in, in) is transmitted in accordance with the transmittance of each layer, and in particular, sunlight is emitted from the third low- It schematically shows the principle of trapping.

Hereinafter, examples and comparative examples of the present invention will be described. The following embodiments are only examples of the present invention, and the present invention is not limited to the following embodiments.

( Example )

Example  One

Using a magnetron sputtering evaporator (Selcos Cetus-S), a multi-layered matte gray coated glass coated on a transparent glass substrate was prepared as follows. Table 1 shows the layer structure of the above-prepared non-light gray functional building material for windows according to the order of lamination.

Floor classification Material (number in parentheses: volume ratio) thickness The third low absorption spacer layer _{SiAlNx (Ar: N 2 = 45} : 55) 50 nm The first high absorption reflective layer NiCr (Ar 100 vol%) 7.5 nm The second low absorption spacer layer _{SiAlNx (Ar: N 2 = 45} : 55) 68 nm The first highly absorbent reflective layer body layer NiCr (Ar 100 vol%) 4.5 nm The first low absorption spacer layer _{SiAlNx (Ar: N 2 = 45} : 55) 45 nm Transparent glass substrate Clear glass 5 mm

Example  2

The matte gray coated glass of Example 1 was used as the outer glass and the inner glass 5 mm was spaced 12 mm (air), and the matte gray coating contained the outer glass and the inner glass in the direction .

Comparative Example  One

The following commercial products were prepared.

Manufacturer: Guardian, Product Name: Crystal Gray, 5mm thick

division Crystal Gray Visible light transmission Transmittance (%) 68 Color index L 85.9 a * -1.6 b * -1.6 Glass surface reflection reflectivity(%) 7 Color index L 31.1 a * -0.5 b * -0.9

Comparative Example  2

The following commercial products were prepared.

Manufacturer: PPG, Product Name: Graylite, Thickness: 5mm

division Graylite Visible light transmission Transmittance (%) 13 Color index L 43.3 a * -0.4 b * -0.4 Glass surface reflection reflectivity(%) 4 Color index L 25.0 a * -0.1 b * -0.6

Comparative Example  3

The following commercial products were prepared.

Manufacturer: PPG, Product Name: SGary, Thickness: 5mm

division SGray Visible light transmission Transmittance (%) 50 Color index L 76.3 a * 0.5 b * -1.9 Glass surface reflection reflectivity(%) 6 Color index L 29.1 a * 0.0 b * -1.4

Experimental Example  One

The matte gray coated glass prepared in Example 1 and the double-layered glass of Example 2 were analyzed by the following items. The results of Example 1 are shown in Table 5 below. The results of Example 2 are shown in Table 6 below.

≪ Calculation of transmittance and reflectance >

The optical spectrum was measured with a 1 nm section width in the range of 250 to 2500 nm using a UV-Vis-NIR spectrometer (Shimadzu, Solidspec-3700), and the resultant value was measured based on the KS L 2514 standard. The reflectivity of the coated surface of the low-emission coating of the functional building material for the window, and the reflectivity of the other surface of the window-functional building material without the low-emission coating, that is, the glass substrate side.

<Color index>

The L *, a *, and b * values of the CIE 1931 standard were measured using a color difference meter (KONICA MINOLTA SENSING, InC., CM-700d). At this time, the light source was applied as D65 of KS standard.

division Example 1 Visible light transmission Transmittance (%) 25 Color index L 57.3 a * 0.6 b * -2.9 Glass surface reflection reflectivity(%) 5 Color index L 25.9 a * 0.5 b * -2.7 Coating surface reflection reflectivity(%) 7 Color index L 31.2 a * 4.1 b * -0.2

In Table 5, the matte gray glass has a low transmittance and a very low glass-surface reflectance of 5%, and the matte is well implemented. In addition, it was confirmed that both transmission and reflection hues are neutral, and grayish due to low transmittance and luminance.

division Example 2 Visible light transmission (%) Transmittance (%) 23 Color index L 54.7 a * -0.2 b * -2.6 Outside reflection reflectivity(%) 5 Color index L 27.4 a * 0.5 b * -2.9 Medial reflex reflectivity(%) 13 Color index L 43.4 a * 1.1 b * -0.7 Solar heat acquisition rate 0.32 Thermal Permeability (W / m ² K) 2.51

In Table 6, the multilayer glass of Example 2 satisfies the conditions of the color indices -4 <a * <1 and -4 <b * <1, and the reflectance of the outer reflection in Table 6 is less than 10% It can be confirmed that it is implemented.

The solar heat acquisition rate and heat transfer rate were obtained according to the NFRC100 standard.

Experimental Example  2

Spectral spectra were obtained using the UV-Vis-NIR spectrometer (Shimadzu, Solidspec-3700) and the emissivity was obtained using FT-IR (Frontier, Perkin Elmer) Then, the values of SHGC (solar heat acquisition rate) and Ug (heat conduction rate) calculated using the results were obtained.

SHGC (Solar Heat Gain Coefficient) is the solar heat gain coefficient (SHGC), which is the ratio of the energy delivered to the interior through the window through which the solar heat enters the window.

Solar Heat Gain = SHGC × Solar Radiation

Ug (U-value) is the heat transfer rate. The transfer of heat through one part of the building, such as a wall composed of different layers of different materials, takes place through several processes. The heat transfer rate through a structure made up of various materials is called the heat transfer rate, which is a value obtained by mixing all the factors. The unit of Ug (U-value) is W / ㎡ ° C (Kcal / ㎡ h ° C), and the heat conduction rate through the structure is measured in watts when the temperature difference is 1 ° C with a surface area of 1m 2. The lower the heat transfer rate, the better the insulation performance.

8 is a graph showing a comparison of the heat transmission rate (Ug-value) of the double-layered glass of Example 2 with that of the gray glass disc of Comparative Example 1-3. In Fig. 8, the double-layered glass of Example 2 exhibits a lower thermal conduction rate compared to Comparative Example 1-3.

9 is a graph showing the solar heat acquisition rate (SHGC or G-value) of the double-layered glass of Example 2 compared with the gray glass disc of Comparative Example 1-3. In Fig. 9, the double-layered glass of Example 2 exhibits an equivalent or low heat conduction ratio as compared with the commercial glass of Comparative Example 1-3.

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, And falls within the scope of the invention.

10, 20: Transparent gray glass
11: first low absorption spacer layer
12: second low absorption spacer layer
13: third low absorption spacer layer
16: top protective layer
21: First high absorbing reflective layer
22: second high absorption reflective layer
40: low radiation coating
50: transparent glass substrate
51: outer transparent glass substrate
52: Inner transparent glass substrate
100, 200: Matte gray coating
1000, 2000: Double layer glass
A: Spacing space

Claims (10)

A first high absorption absorption layer, a first high absorption absorption reflection layer, a second low absorption absorption layer, a second high absorption reflection layer and a third low absorption absorption layer,
Wherein the first high absorption reflection layer and the second high absorption reflection layer have an extinction coefficient of at least 1,
Wherein the first low-absorption spacer layer, the second low-absorption spacer layer and the third low-absorption spacer layer have an extinction coefficient of 0.5 or less
Matte gray coating.
The method according to claim 1,
Wherein the first and second high absorption reflection layers each comprise one selected from the group consisting of Ni, Ti, Cr, Al and combinations thereof
Matte gray coating.
The method according to claim 1,
Wherein the first low-absorption spacer layer, the second low-absorption spacer layer and the third low-absorption spacer layer each have a four-component system or less including one selected from the group consisting of Si, Al, Zn, Sn, Ti, Of one or more metals selected from the group consisting of nitrides, oxides, oxynitrides, and combinations thereof.
Matte gray coating.
The method according to claim 1,
The thickness ratio of the first high absorption reflection layer to the second high absorption reflection layer is preferably from 1: 1.1 to 2.0
Matte gray coating.
The method according to claim 1,
Wherein the thickness ratio of the first low absorption spacing layer to the second low absorption spacing layer to the third low absorption spacing layer is from 1: 1.6 to 2.0: 1.1 to 1.5
Matte gray coating.
The method according to claim 1,
Wherein the transmittance of light passing through the first low absorption gap layer in the direction of the third low absorption gap layer is 30% or less, the reflectance is 10% or less, the corrected emissivity is 0.87 or less
Matte gray coating.
A transparent glass substrate and a matte gray coating according to claim 1, wherein the first low absorption spacing layer is laminated so as to be in contact with the transparent glass substrate
Matte gray coated glass.
8. The method of claim 7,
A color index a * value of -4 to 1 and a color index b * value of -4 to 1, measured using a colorimeter of the other colorless surface of the transparent glass substrate on which the matte gray coating is not formed,
Matte gray coated glass.
An inner transparent glass substrate and an outer transparent glass substrate spaced apart from the inner transparent glass substrate,
Wherein the first transparent substrate includes a matte gray coating according to claim 1 coated on the inner side of the outer transparent glass substrate,
Double layer glass.
10. The method of claim 9,
And a low emissivity coating coated on an outer surface of the inner transparent glass substrate
Double layer glass.

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