KR20190078758A - Binder, coating composition for thermal blocking and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a binder, a coating composition for thermal blocking comprising chalcogenide-based nanoparticles and an organic solvent, and a production method thereof. The coating composition for thermal blocking according to the invention comprises: the binder excellent in adhesion with glass; and the chalcogenide-based nanoparticles as an infrared ray blocking agent, thereby having an excellent thermal blocking effect and excellent mechanical properties.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a composition for forming a coating layer,

The present invention relates to a composition for thermal barrier coating comprising a binder having excellent adhesion to glass and including chalcogenide-based nanoparticles as an infrared ray blocking agent and having excellent heat distortion effect and mechanical properties, and a method for producing the same.

As the global warming rapidly progresses, the inflow of ultraviolet rays is recognized as a serious problem due to the ozone layer destruction due to the increase of summer temperature. As the glass window area increases, the room temperature rise due to the summer radiant heat and the room temperature imbalance due to the location, And problems such as lowering of efficiency are occurring steadily.

On the other hand, there are frequent secondary damages due to infringement of view rights and unsightly appearance, exposure to unhealthy ultraviolet rays, scattering in the case of glass breakage, etc., with a sun shade device (blind, vertical, curtain, etc.) Energy loss through windshields exceeds 60%. In order to reduce the amount of freon gas and carbon dioxide, the importance of energy conservation as well as various environmental regulations are becoming increasingly important in the world. Therefore, buildings require a higher level of energy saving measures .

In this regard, conventional energy-saving glass is being built on buildings by producing low E-glass. It is a glass coated with a special metal film with high infrared reflectance inside of ordinary glass, which reflects infrared light to minimize heat transfer to and from the room. This has disadvantages such as pyrolytic method and sputtering method, which are difficult and expensive.

In order to simplify the problems of the prior art, efforts have been made to simplify the process and to reduce the cost by enabling direct coating on ordinary glass. However, the coating material used as a heat shield for a conventional window has a problem that the adhesion of the coating material to the glass is weak due to the use of the organic binder, so that the coating film easily peels off and the mechanical properties are weak.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a thermosetting resin composition which comprises a binder excellent in adhesion to glass, And to provide a composition for coating an excellent thermal barrier coating.

Another object of the present invention is to provide a method for preparing such a composition for thermal barrier coating.

According to one aspect of the present invention, there is provided a binder prepared by sol-gel reaction of a compound represented by formula (1) and a compound represented by formula (2).

[Structural formula 1]

In the above formula 1,

R ¹ is independently an alkyl group having 1 to 3 carbon atoms,

m is 4,

[Structural formula 2]

In the above formula 2,

이고,R ² each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,

이고,R ³ each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,

r is one of integers from 1 to 3,

, 또는

이고,X is

, or

ego,

s is an integer of 1 to 3,

p is one of integers from 1 to 3,

q is one of integers from 1 to 3,

p + q is 4.

Another aspect of the present invention relates to a binder as described above; Chalcogenide nanoparticles; And an organic solvent.

The thermal barrier coating composition according to an embodiment of the present invention may include 1 to 20 parts by weight of a chalcogenide-based nanoparticle compound and 30 to 500 parts by weight of an organic solvent based on 100 parts by weight of the binder.

The compound represented by the structural formula 2 may be at least one selected from the group consisting of methyltriethoxysilane, vinyltrimethoxysilane, dimethyldimethoxysilane, diethyldiethoxysilane, gamma-aminopropyltriethoxysilane, Aminopropyltrimethoxysilane, γ-glycidyloxypropyltrimethoxysilane, aminoethyl-γ-aminopropyltrimethoxysilane, γ-glycidoxysilane, (Γ-Glycidoxypropyltrimethoxysilane), and the like.

The molar ratio of the compound represented by Formula 1 to the compound represented by Formula 2 may be 1: 0.5 to 1:10.

Further, the sol-gel reaction can be carried out under an acid catalyst.

2, 0 < y < 2), Cu _2-x Se _y (0 <x <2, 0 <y <2), and Cu _2-x S _y Cu _2-x Te _y (0 <x <2, 0 <y <2).

In addition, the chalcogenide-based nanoparticles may be CuS.

The average diameter of the chalcogenide-based nanoparticles may be 1 to 200 nm.

In addition, the chalcogenide nanoparticles may absorb infrared rays.

The thermal barrier coating composition may further include a dispersant.

In addition, the thermal barrier coating composition may further comprise an ultraviolet screening agent.

In addition, the ultraviolet screening agent may include at least one selected from the group consisting of hydroxyphenyl-benzotriazole and hydroxy-phenyl-triazine derivatives.

Another aspect of the present invention is a glass composition comprising glass; And a heat shielding layer formed on the glass and including a binder and chalcogenide nanoparticles, wherein the binder is a sol-gel compound having a structure represented by Structural Formula (1) and a compound represented by Structural Formula (2) Wherein the glass transition temperature is in a range of from about 300 ° C to about 900 ° C.

[Structural formula 1]

In the above formula 1,

R ¹ is independently an alkyl group having 1 to 3 carbon atoms,

m is 4,

[Structural formula 2]

In the above formula 2,

이고,R ² each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,

이고,R ³ each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,

r is one of integers from 1 to 3,

, 또는

이고,X is

, or

ego,

s is an integer of 1 to 3,

p is one of integers from 1 to 3,

q is one of integers from 1 to 3,

p + q is 4.

Another aspect of the present invention is a process for producing a binder, comprising: (a) preparing a binder; (b) preparing a dispersion comprising a chalcogenide-based nanoparticle compound; And (c) mixing the binder with a dispersion liquid.

In the method for preparing a coating composition for a thermal barrier coating according to an embodiment of the present invention, the step (a) may include a step of mixing the compound represented by the structural formula 1 and the compound represented by the structural formula 2 into an organic solvent, Sol-gel reaction.

[Structural formula 1]

In the above formula 1,

R ¹ is independently an alkyl group having 1 to 3 carbon atoms,

m is 4,

[Structural formula 2]

In the above formula 2,

이고,R ² each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,

이고,R ³ each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,

r is one of integers from 1 to 3,

, 또는

이고,X is

, or

ego,

s is an integer of 1 to 3,

p is one of integers from 1 to 3,

q is one of integers from 1 to 3,

p + q is 4.

 In addition, the step (b) may include ball milling the chalcogenide nanoparticles into an organic solvent.

The composition for thermal barrier coating according to the present invention is advantageous in that it can be directly coated on transparent glass, can absorb near infrared rays and can be applied to a short glass of heat, and has a high transmittance of 60% or higher even in the visible light region.

In particular, it has an effect of improving performance such as adhesion property, mechanical property, transparency, moisture resistance and the like compared with a coating material to which the conventional organic binder is applied.

FIG. 1A is a photograph of a glass specimen produced according to Example 2-2, and FIG. 1B is a photograph of a glass specimen manufactured according to Control Example 2-1.
FIG. 2A is a photograph of a test specimen of a short train manufactured according to Example 4-1, and FIG. 2B is a photograph of a test specimen of a short train manufactured according to Comparative Example 4-2.
FIG. 3 is a graph showing a result of transmission spectrum measurement of a short-train thermal glass specimen produced according to Example 4-1.

The invention is capable of various modifications and may have various embodiments, and particular embodiments are exemplified and will be described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Furthermore, terms including an ordinal number such as first, second, etc. to be used below can be used to describe various elements, but the constituent elements are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is also to be understood that when an element is referred to as being "on another element", "on another element" or "on another element" Formed or laminated, but it should be understood that other components may be present in the middle.

The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, the present invention will be described in detail. However, it should be understood that the present invention is not limited thereto, and the present invention is only defined by the scope of the following claims.

One aspect of the present invention relates to a binder prepared by sol-gel reaction of a compound represented by Structural Formula (1) and a compound represented by Structural Formula (2).

[Structural formula 1]

In the above formula 1,

R ¹ is independently an alkyl group having 1 to 3 carbon atoms,

m is 4,

[Structural formula 2]

In the above formula 2,

이고,R ² each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,

이고,R ³ each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,

r is one of integers from 1 to 3,

, 또는

이고,X is

, or

ego,

s is an integer of 1 to 3,

p is one of integers from 1 to 3,

q is one of integers from 1 to 3,

p + q is 4.

Another aspect of the present invention relates to a binder as described above; Chalcogenide nanoparticles; And an organic solvent.

The thermal barrier coating composition according to an embodiment of the present invention may include 1 to 20 parts by weight of a chalcogenide-based nanoparticle compound and 30 to 500 parts by weight of an organic solvent based on 100 parts by weight of the binder.

The compound represented by the structural formula 2 may be at least one selected from the group consisting of methyltriethoxysilane, vinyltrimethoxysilane, dimethyldimethoxysilane, diethyldiethoxysilane, gamma-aminopropyltriethoxysilane, Aminopropyltrimethoxysilane, γ-glycidyloxypropyltrimethoxysilane, aminoethyl-γ-aminopropyltrimethoxysilane, γ-glycidoxysilane, (Γ-Glycidoxypropyltrimethoxysilane), and the like.

In the present invention, the molar ratio of the compound represented by Formula 1 to the compound represented by Formula 2 is preferably 1: 0.5 to 1:10. When the molar ratio of the compound represented by the structural formula 1 is less than 1: 0.5, the functional groups are relatively short, and when condensation occurs due to the hydrolysis reaction of many compounds, the hardening of the coating film occurs, It is undesirable that the coating layer is broken. When the ratio is more than 1:10, the coating layer may be thickened, but if the functional group is long or the number is small, the properties of the organic binder become low and the mechanical properties are low.

In the present invention, when the base catalyst is used in the sol-gel reaction, silica particles are formed by the hydrolysis and condensation reaction. Therefore, it is preferable to perform the sol-gel reaction under the acid catalyst.

Generally, the sol-gel reaction means a method of producing glass or ceramics at a relatively low temperature by using a hydrolysis and condensation reaction of a metal alkoxide, M (OR) n.

Here, the sol is a state in which solid particles are dispersed in a liquid phase in a colloidal state, and in particular, the size of solid particles is very small (several nm to several hundreds of nm), which means a state in which Brownian motion can be performed without being influenced by gravity , The gel refers to a state in which the constituents of the sol form a network or a polymer chain connected to each other by a specific chemical or physical bond to lose fluidity. In the gel state, the solid phase forms a network and the liquid phase is fixed in the network.

The sol-gel reaction is a technique that can be controlled so as to realize specific physical properties at all stages until the sol is gelated, and can be said to be a method for producing a material through formation of a sol, gelation, and removal of a solvent. In the gel state, the formed network or polymer chain has a refractive index that is the same as that of the surrounding sol. However, if the concentration of the particles is much higher than that of the surrounding sol, the refractive index and density become high, The case is defined as precipitate.

Since the sol-gel reaction can start from the liquid state, the reaction can be easily controlled, chemical uniformity can be maintained, and various types of final products can be prepared. The most commonly used metal alkoxides are alkoxysilanes, which are relatively easy to control for reaction as compared to other metal alkoxides.

In general, alkoxysilanes are not dissolved in water. Therefore, organic solvent is used as a cosolvent. After hydrolysis and condensation of metal alkoxide in solution, the precursor sol in the form of oligomer Gel reaction, which becomes a gel of a three-dimensional network structure by an additional condensation reaction.

Hydrolysis:

≡Si-OR + H ₂ O → ≡Si-OH + ROH

Condensation reaction:

≡Si-OH + ≡Si-OH → ≡Si-O-Si≡ + H ₂ O

≡Si-OH + ≡Si-OR → ≡Si-O-Si≡ + ROH

In the solution, the particles are grown to form the initial sol phase, and then transferred to the gel phase through growth and connection. The gel properties are greatly influenced by the initial growth state of the particles. Therefore, it is a key technology of the sol-gel process to control the grain growth method.

When the particles in the solution form a three-dimensional net structure by forming a metal-oxygen bond by hydrolysis and condensation reaction, the viscosity of the solution increases sharply and the fluidity is lost through the gel point . This process is called gelling. This phenomenon is called aging by the phenomenon that the monomers dissolved in the connected part of the gel on the formed gel are repeatedly grown. Until this process, there is a solvent introduced at the beginning of the reaction. In order to prepare the product as a useful product, it is necessary to remove these solvents.

In comparison with the conventional ceramic manufacturing process and the sol-gel process, it is easy to control the size of the intermediate product because the sol-gel process uses the compound of the molecular unit as the starting material, and the shape of the final product is called the nano- powder, particle, fiber, thin film, monolith, composite, and the like.

Applications of these new materials include various optical coatings, protective coatings, functional films, structural materials, and component materials. The most intriguing areas are coatings that can provide various functionalities.

In the present invention, the chalcogenide-based nanoparticles include Cu _2-x S _y (0 <x <2, 0 <y <2), Cu _2-x Se _y 2), Cu _2-x Te _y (0 <x <2, 0 <y <2). At this time, the chalcogenide nanoparticles may preferably be CuS.

In the present invention, the average diameter of the chalcogenide-based nanoparticles may preferably be 1 to 200 nm. At this time, the chalcogenide nanoparticles can be uniformly distributed in the binder.

Since the chalcogenide-based nanoparticles according to the present invention absorb infrared rays and have thermal barrier properties, the coating composition according to the present invention can be applied to energy-saving glass.

Examples of the organic solvent include alcohols such as methanol, ethanol, isopropanol, butanol and octanol, ketones such as methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, acetone and diacetone alcohol, Ethers such as methyl acetate, ethyl acetate, propylene glycol monomethyl ether acetate, and propylene glycol monoethyl ether acetate; aromatic compounds such as benzene, toluene, and xylene; aromatic hydrocarbons such as benzene, toluene and xylene; At least one material selected from among hydrocarbons, dimethylformamide, dimethylacetamide and N-methylpyrrolidone may be appropriately mixed according to the solubility, viscosity and coating conditions of the composition.

The thermal barrier coating composition according to the present invention may further comprise a dispersant for improving the acidity of the chalcogenide nanoparticles.

In addition, the composition for thermal barrier coating according to the present invention may further comprise an ultraviolet screening agent. At this time, at least one selected from the group consisting of hydroxyphenyl-benzotriazole and hydroxy-phenyl-triazine derivative may be used as the ultraviolet light blocking agent.

Another aspect of the present invention is a process for preparing a dispersion comprising: (a) preparing a binder; (b) preparing a dispersion comprising the chalcogenide-based nanoparticle compound; and (c) mixing the binder and the dispersion. The present invention relates to a method for producing a composition for coating a heat shield.

In the production method according to the present invention, the step (a) includes a step of mixing the compound represented by the structural formula 1 and the compound represented by the structural formula 2 into an organic solvent, and subjecting the mixed solution to a sol-gel reaction .

[Structural formula 1]

In the above formula 1,

R ¹ is independently an alkyl group having 1 to 3 carbon atoms,

m is 4,

[Structural formula 2]

In the above formula 2,

이고,R ² each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,

이고,R ³ each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,

r is one of integers from 1 to 3,

, 또는

이고,X is

, or

ego,

s is an integer of 1 to 3,

p is one of integers from 1 to 3,

q is one of integers from 1 to 3,

p + q is 4.

Here, the sol-gel reaction can be preferably carried out under an acid catalyst.

In the method for preparing a coating composition for a thermal barrier coating according to the present invention, the step (b) may include ball milling by injecting chalcogenide nanoparticles into an organic solvent. At this time, it is preferable to add a dispersant to improve the dispersibility of the chalcogenide nanoparticles.

Hereinafter, the present invention will be described in more detail with reference to examples. However, this is for illustrative purposes only, and thus the scope of the present invention is not limited thereto.

[Example]

Example 1: Binder synthesis

Example 1-1: Synthesis of Binder 1

50% by weight of TEOS: VTMOS (Vinyltrimethoxysilane) in a molar ratio of 1: 1 and 50% by weight of an ethanol solvent were placed in a round flask, and the mixture was stirred at room temperature for about 1 hour. .

Acetic acid, an acid catalyst, was then added and sol-gel reaction was carried out at a temperature of 60-70 for 5 hours. After completion of the reaction, the mixture was filtered through # 300 mesh to obtain a binder.

Example 1-2: Synthesis of Binder 2

Binder 2 was synthesized in the same manner as in Example 1-1, except that the molar ratio of TEOS: VTMOS was changed to 1: 5 instead of 1: 1.

Example 1-3: Synthesis of Binder 3

A binder 3 was synthesized in the same manner as in Example 1-1, except that the molar ratio of TEOS: VTMOS was changed to 1:10 instead of 1: 1.

Control Example 1-1: Synthesis of Binder 4

Binder 4 was synthesized in the same manner as in Example 1-1, except that only TEOS was used instead of TEOS and VTMOS.

Comparative Example 1-1: Synthesis of organic binder

20% by weight of an acrylate-based monomer DPHA (Dipentaerythritol Hexaacrylate), 5% by weight of TMPTA (Trimethylopropane Triacylate), 5% by weight of TPGDA (Tripropylene Glycol Diacrylate), 10% by weight of HDDA (1,6-Hexanediol Diacrylate) 5% by weight of methyl ethyl ketone (MEK), 10% by weight of propylene glycol monomethyl ether (PGME) and 15% by weight of butyl acetate (BA) And mixed in a beaker using a stirrer.

The mixture was then filtered through # 300 mesh to obtain an organic binder.

Example 2: Preparation of binder-coated glass specimen

Example 2-1: Preparation of glass specimen coated with binder 1

The binder 1 synthesized as in Example 1-1 was coated with a # 10 bar (Mayer Bar) on a glass substrate using a Bar coater and cured for 30 minutes in a conventional oven at 150 to obtain a coating layer.

Example 2-2: Preparation of a glass sample coated with a binder 2

A glass specimen coated with a binder 2 was prepared in the same manner as in Example 2-1 except that the binder 2 was used instead of the binder 1.

Example 2-3: Preparation of glass specimen coated with binder 3

A glass specimen coated with the binder 3 was prepared in the same manner as in Example 2-1 except that the binder 3 was used instead of the binder 1.

Control Example 2-1: Preparation of glass-coated glass sample

A glass specimen coated with the binder 3 was prepared in the same manner as in Example 2-1 except that the binder 4 was used instead of the binder 1.

Comparative Example 2-1: Manufacture of glass-coated glass substrate coated with organic binder

The organic binder obtained as described in Comparative Example 1 was coated on a glass substrate with a # 10 bar (Mayer Bar) using a Bar coater, dried in a conventional oven for 80 minutes for 2 minutes, and then irradiated with 400 mJ / cm 2 To obtain a coating layer.

Example 3: Preparation of Composition for Thermal Barrier Coating

Production Example 3-1: Production of chalcogenide-based CuS dispersion

100 g of the copper sulfide nano-particle powder was put into a ball milling machine. Methyl ethyl ketone was added as an organic solvent so as to have a solid content of 30% by weight in the ball milling apparatus. Disperbyk 161 (manufactured by BW KK) ) Was added in an amount of 5% by weight based on the powder, and ball milling was performed for 192 hours using 0.1 mm zirconia beads (balls).

The rotational speed of the ball milling apparatus was set to about 300 rpm. The copper sulfide nanoparticle dispersion was prepared by this method and the particle size was measured through a nano particle size analyzer (Zetasizer Nano ZS90). As a result, it was confirmed that the primary particle size was in the range of 10 to 100 nm.

Example 3-1: Preparation of composition for thermal barrier coating

The binder prepared in Example 1-2 and the CuS dispersion prepared in Production Example 3-1 were mixed so that the weight ratio of the binder and dispersion was 10: 1, and the mixture was added to a beaker. The mixture was stirred at a speed of 300 rpm Minute to prepare a coating composition for thermal barrier coating having an infrared ray blocking function.

Comparative Production Example 3-1: Preparation of ATO (antimony tin oxide) dispersion

An ATO dispersion was prepared in the same manner as in Production Example 3-1, except that ATO powder was used instead of the copper sulfide nano-particle powder.

COMPARATIVE EXAMPLE 3-1: Preparation of composition for thermal barrier coating

The procedure of Example 2 was repeated except that the ATO dispersion of Comparative Production Example 3-1 was used instead of the CuS dispersion of Production Example 3-1.

Comparative Example 3-2: Preparation of composition for heat short-circuit coating

The procedure of Example 3-1 was repeated, except that the organic binder of Comparative Example 1-1 was used instead of the binder of Example 1-2.

Example 4: Production of heat shield glass

Example 4-1: Production of heat shield glass

The composition for short-circuiting according to Example 3-1 was coated with a # 10 bar (Mayer Bar) on a glass substrate using a Bar coater and cured for 30 minutes in a conventional oven for 150 minutes to prepare a short glass .

Comparative Example 4-1: Manufacture of heat short glass

The same procedure as in Example 3-1 was carried out except that the thermal head coating composition of Comparative Example 3-1 was used instead of the thermal head coating composition of Example 3-1.

Comparative Example 4-2: Production of heat short glass

The same procedure as in Example 3 was carried out except that the thermal head coating composition of Comparative Example 3-2 was used instead of the thermal head coating composition of Example 3-1.

Test Example 1: Evaluation of Physical Properties of Binder

The transmittance, haze, adhesion, pencil hardness and QUV durability of glass specimens prepared according to Examples 2-1 to 2-3, Control 1-1 and Comparative Example 1-1 were measured and shown in Table 1 below Respectively.

[How to measure]

- Transmittance: Through UV-Vis-NIR spectrophotometer, transmittance of ultraviolet, visible, and near infrared rays of coated specimen can be measured. The visible light transmittance represents the wavelength band in the range of 380-780 nm, and the average value of the transmittance was obtained.

- Haze: The haze value was confirmed by using Haze Meter (Model NHD-200, manufactured by Nippon Denshoku Kogyo Co.).

- Adhesion: Using a cross-cutter, cure the coated film on glass to form 100 squares of 1 mm x 1 mm. Then, attach a standard (3M) tape to 100 squares and check that there are 100 sauare after removing the film and count the number of remaining cells.

- Pencil hardness: The pencil hardness was measured with a pencil hardness meter (Mitsubishi Evaluation Pencil) at a speed of 7.5 N, 0.5 mm / sec 5 times, and the number of scratches was checked.

- QUV durability: As an accelerated weathering test evaluation, color and characteristic changes were confirmed by repeated action on coating samples using ultraviolet lamps.

Example 2-1 Example 2-2 Example 2-3 Control Example 2-1 Comparative Example 2-1 Transmittance (%) 84.43 92.94 91.23 86.58 91.94 Haze (%) 2.63 0.35 0.58 53.82 0.42 Adhesion 100/100 100/100 95/100 80/100 5/100 Pencil hardness 9H 9H 8H 7H 6H QUV durability Good Good NG Good NG

As can be seen from Table 1, the binder according to the present invention has improved mechanical properties such as adhesion and pencil hardness as compared with the conventional organic binder.

1A is a photograph of a glass specimen manufactured according to Example 2-2, and FIG. 1B is a photograph of a glass specimen manufactured according to Control Example 2-1. 1A and 1B, it can be seen that the binder according to the present invention does not crack when coated at a thickness of about 5 mu m or more on the coated glass base material through proper condensation reaction, and the appearance is good.

Test Example 2: Measurement of transmittance of heat absorbing dispersion

The transmittance up to 380-1400 nm for the heat-absorbing dispersion prepared according to Production Example 3-1 and Comparative Production Example 3-1 was measured and shown in Table 2 below.

[How to measure]

- Visible light transmittance: UV-Vis-NIR spectrophotometer can be used to measure the transmittance of ultraviolet, visible and near-infrared light of coated specimens. The visible light transmittance represents the wavelength band in the range of 380-780 nm, and the average value of the transmittance was obtained.

- Near-infrared cut-off rate: UV-Vis-NIR spectrophotometer can measure the transmittance of ultraviolet, visible, and near infrared rays of coated specimens. The near infrared ray transmittance represents a wavelength band in the range of 780 to 1400 nm, and the near infrared ray cutoff rate is obtained as "100 (%) - average value of transmittance".

Production example 3-1 Comparative Production Example 3-1 Visible light transmittance (%) 59.54 60.17 NIR blocking rate (%) 80.92 76.58

As can be seen from the above Table 2, the heat absorbing dispersion containing the chalcogenide nanoparticles according to the present invention is superior to the conventional heat absorbing dispersion liquid in the transmittance of the visible light region to the near infrared region. .

Test Example 3: Evaluation of physical properties of heat shield glass

The transmittance, haze, adhesive force, pencil hardness and QUV durability of the short-train heat-resistant glass coating layer prepared according to Example 4-1, Comparative Example 4-1 and Comparative Example 4-2 were measured and shown in Table 3 below.

Example 4-1 Comparative Example 4-1 Comparative Example 4-2 Visible light transmittance (%) 63 65 64 NIR blocking rate (%) 70 67 72 Haze (%) 0.42 0.35 0.53 Adhesion 100/100 100/100 10/100 QUV durability Good Good NG

As can be seen from the above Table 3, in the case of the heat shielding glass coated with the composition for covering the heat shielding according to the present invention, the adhesive strength between the substrate and the coating layer is higher than that of the conventional heat shielding glass coated with the organic binder composition And QUV durability is excellent.

FIG. 2A is a photograph of a test specimen of a short train made according to Example 4-1, and FIG. 2B is a photograph of a test specimen of a short train manufactured according to Comparative Example 4-2. In the case of Comparative Example 4-2, all of the coating layers were separated in the evaluation of the adhesion strength, but in the case of Example 4-1, the adhesion was good.

3 is a graph showing a transmission spectrum measurement result of the ultraviolet ray, visible ray, and infrared ray region of the heat ray short glass specimen according to Example 4-1. As can be seen from FIG. 3, the composition for thermal barrier coating according to the present invention shows excellent transmittance in the visible light region and low heat transmittance in the infrared region, thereby absorbing heat in the infrared region.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

Claims (17)

A binder prepared by a sol-gel reaction between the compound represented by Formula 1 and the compound represented by Formula 2:
[Structural formula 1]

In the above formula 1,
R ¹ is independently an alkyl group having 1 to 3 carbon atoms,
m is 4,
[Structural formula 2]

In the above formula 2,
R ² each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,
R ³ each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,
r is one of integers from 1 to 3,
X is

, or

ego,
s is an integer of 1 to 3,
p is one of integers from 1 to 3,
q is one of integers from 1 to 3,
p + q is 4. bookbinder;
Chalcogenide nanoparticles; And
An organic solvent,
Wherein the binder is prepared by a sol-gel reaction of a compound represented by formula 1 and a compound represented by formula 2:
[Structural formula 1]

In the above formula 1,
R ¹ is independently an alkyl group having 1 to 3 carbon atoms,
m is 4,
[Structural formula 2]

In the above formula 2,
R ² each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,
R ³ each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,
r is one of integers from 1 to 3,
X is

, or

ego,
s is an integer of 1 to 3,
p is one of integers from 1 to 3,
q is one of integers from 1 to 3,
p + q is 4. 3. The method of claim 2,
Wherein the thermal barrier coating composition comprises 1 to 20 parts by weight of the chalcogenide nanoparticles and 30 to 500 parts by weight of the organic solvent based on 100 parts by weight of the binder. 3. The method of claim 2,
Wherein the compound represented by the structural formula 2 is selected from the group consisting of methyltriethoxysilane, vinyltrimethoxysilane, dimethyldimethoxysilane, diethyldiethoxysilane, gamma-aminopropyltrimethoxy Aminopropyltrimethoxysilane, gamma -glycidyloxypropyltrimethoxysilane, aminoethyl-gamma -aminopropyltrimethoxysilane and gamma-glycidoxypropyltrimethoxysilane, and gamma-glycidoxypropyltrimethoxysilane, (Γ-Glycidoxypropyltrimethoxysilane). The composition for short-term coating according to claim 1, wherein the composition further comprises at least one member selected from the group consisting of γ-glycidoxypropyltrimethoxysilane. 3. The method of claim 2,
Wherein the molar ratio of the compound represented by Formula 1 to the compound represented by Formula 2 is 1: 0.5 to 1:10. 3. The method of claim 2,
Wherein the sol-gel reaction is carried out under an acid catalyst. 3. The method of claim 2,
Said knife Koji arsenide-based nanoparticles, _{Cu 2-x S y (0} <x <2, 0 <y <2), Cu 2-x Se y (0 <x <2, 0 <y <2), Cu 2 _-x Te _y (0 <x <2, 0 <y <2). 8. The method of claim 7,
Wherein the chalcogenide-based nanoparticles are CuS. 9. The method of claim 8,
Wherein the average diameter of the chalcogenide-based nanoparticles is 1 to 200 nm. 3. The method of claim 2,
Wherein the chalcogenide-based nanoparticles absorb infrared rays. 3. The method of claim 2,
Wherein the composition for thermal barrier coating further comprises a dispersing agent. 3. The method of claim 2,
Wherein the thermal barrier coating composition further comprises an ultraviolet screening agent. 13. The method of claim 12,
Wherein the ultraviolet light blocking agent comprises at least one member selected from the group consisting of hydroxyphenyl-benzotriazole and hydroxy-phenyl-triazine derivative. &Lt; / RTI &gt; Glass; And
And a heat shielding layer formed on the glass and including a binder and chalcogenide nanoparticles,
Wherein the binder is prepared by a sol-gel reaction of a compound represented by formula 1 with a compound represented by formula 2:
[Structural formula 1]

In the above formula 1,
R ¹ is independently an alkyl group having 1 to 3 carbon atoms,
m is 4,
[Structural formula 2]

In the above formula 2,
R ² each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,
R ³ each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,
r is one of integers from 1 to 3,
X is

, or

ego,
s is an integer of 1 to 3,
p is one of integers from 1 to 3,
q is one of integers from 1 to 3,
p + q is 4. (a) preparing a binder;
(b) preparing a dispersion containing chalcogenide-based nanoparticles; And
(c) mixing the binder and the dispersion liquid;
Wherein the heat-shrinkable coating layer is formed on the substrate. 16. The method of claim 15,
The step (a) includes a step of mixing the compound represented by the structural formula (1) and the compound represented by the structural formula (2) into an organic solvent, and a step of sol-gel reaction of the compound represented by the structural formula (1) and the compound represented by the structural formula Wherein the heat-resistant coating composition comprises:
[Structural formula 1]

In the above formula 1,
R ¹ is independently an alkyl group having 1 to 3 carbon atoms,
m is 4,
[Structural formula 2]

In the above formula 2,
R ² each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,
R ³ each independently represents an alkyl group having 1 to 3 carbon atoms, or

ego,
r is one of integers from 1 to 3,
X is

, or

ego,
s is an integer of 1 to 3,
p is one of integers from 1 to 3,
q is one of integers from 1 to 3,
p + q is 4. 16. The method of claim 15,
Wherein the step (b) comprises ball milling the chalcogenide-based nanoparticles in an organic solvent.

Images