CN100429168C - A transparent insulating glass - Google Patents

Abstract

The invention relates to medium transparent heat insulation glass, in particular to heat insulation glass coated with a nano transparent heat insulation coating and having good heat insulation performance, which can be widely applied to occasions such as automobile windows, building windows and the like. Preparing nano transparent heat-insulating functional paint, then coating the paint on the surface of glass in a spraying and brushing way, and drying and curing to obtain the glass with heat-insulating function. The invention adopts the form of coating the nano coating to realize the heat insulation function of the glass on the premise of not influencing the transparency of the glass, has simpler and more convenient preparation method and low cost, and greatly improves the heat insulation performance of the glass on the premise of basically not influencing the light transmission performance of the glass.

Description

A transparent insulating glass

technical field

The invention relates to a transparent heat-insulating glass, in particular to a nano-transparent heat-insulating coating. The heat-insulating glass with good heat-insulating performance can be widely used in automobile windows, building windows and the like.

Background technique

In the prior art, the solution to the heat insulation problem of glass is usually achieved by sticking film or heat insulation paper. Ordinary sunshade film and thermal insulation paper can certainly shade the sun, but they also block the penetration of visible light and affect the line of sight.

According to the data, Chinese patent CN93110358.4 (preparation method and special nozzle for glass transparent heat-insulating film) adopts atmospheric pressure chemical vapor deposition process to form transparent heat-insulating film on the glass surface.

Chinese patent CN98100128.9 (preparation method of heat-insulating and defrosting coated glass) has invented a method of preparing heat-insulating coated glass, which is characterized in that: the indium-tin alloy ceramic target is sputtered to a temperature of 260-350°C The glass surface with a light transmittance greater than 80% generates a transparent conductive film (ITO film) with thermal insulation properties through a high-temperature chemical reaction on the surface

Chinese patent CN01107749.2 (glass coated with low-e film) invents a glass with a low-e film coating, which is composed of a glass base sheet and a low-e film, wherein the low-e film contains metal Ag or Cu, and Al ₂ O ₃ .

The insulation glass film layers used in the above patents all use sputtering to realize the functional film layer on the glass surface, and the preparation method is relatively complicated.

Contents of the invention

The technical problem to be solved in the present invention is to overcome the deficiencies in the above-mentioned technologies, and propose a method for preparing transparent heat-insulating glass, that is, to realize the insulation of the glass without affecting the transparency of the glass by using the method of nano-coating coating. Thermal function, its preparation method is relatively simple, and its heat insulation performance can be greatly improved under the premise of basically not affecting the light transmission performance of glass.

The technical scheme adopted by the present invention is as follows: firstly prepare nano-transparent heat-insulating functional coating, then apply the coating on the glass surface by spraying and brushing, and obtain glass with heat-insulating function after drying and curing.

On the basis of the patent CN200410014672.4 "Nano-transparent heat-insulating composite coating" already owned by the applicant of this patent, the coating formula is improved, and the nano-transparent heat-insulating coating is coated on the surface of ordinary glass by spraying and brushing methods, and the invention and Prepared three types of insulating glass coated with a transparent heat-insulating coating, namely, coated insulating glass, single-layer coated insulating glass, and double-layer coated insulating glass, which are used for automobile windows and building windows and other occasions.

Relevant test data show that the visible light transmittance of these three new types of insulating glass can reach more than 70%, which fully meets the standard of not less than 70% for the light transmittance of automobile front windshields formulated by relevant international/national institutions; Almost all ultraviolet rays are absorbed; for near-infrared light, which accounts for 50% of solar energy, it can also block 60-80%; if it is applied to automobiles, after using this kind of heat-insulating glass, the temperature of the car dashboard can be reduced by 8-18 Celsius. As the temperature inside the car drops significantly, the load on the air conditioner is greatly reduced, which plays a role in reducing energy consumption and plays a great role in the energy saving of the car. If applied to building window glass, not only does not affect the lighting effect of the building, but also can reduce the indoor temperature of the building by 5-8°C according to the size of the building window, which has very positive significance for the energy saving of building air conditioning.

Concrete technical scheme of the present invention is:

A transparent heat-insulating glass, characterized in that it consists of a glass substrate and a transparent heat-insulating coating; wherein the components and parts by weight of the heat-insulating coating are as follows:

Polymer resin 30～65

Nano powder 5～20

Coating additives 1～10

Thinner 29～58

The polymer resin in the coating described therein is water-based polyurethane or epoxy resin; the nanopowder is at least containing antimony tin oxide (ATO) or indium tin oxide (ITO), and ferric oxide (Fe ₃ O ₄ ), titanium dioxide (TiO ₂ ), silicon dioxide (SiO ₂ ) or zinc oxide (ZnO) or any combination of any two, the particle size range is 20-80nm; coating additives include at least dispersant, leveling agent, disinfectant A kind of foaming agent, film-forming aid and thickener. The dispersant is a polymeric anionic dispersant; the leveling agent is an acrylic copolymer or a non-reactive polyether modified polysiloxane; the defoamer is a modified polysiloxane; the film-forming aid It is a mixture of ethylene glycol monobutyl ether/dipropylene glycol butyl ether; the thickener is a water-soluble dispersion of hydroxyacrylic acid; the diluent is water and/or alcohols. The glass substrate is an ordinary glass substrate.

The preparation method of the nano-transparent heat-insulating coating of the present invention is as follows: firstly, the above-mentioned raw materials are prepared into a coating by mechanical blending according to the formula, and then the transparent heat-insulating coating containing nanoparticles is coated by spraying and brushing. Covered on the glass and cured at a temperature of 60-180°C for 1-2 hours, it is enough to form a glass coated with a nano-transparent heat-shielding coating.

The heat-insulating glass of the present invention can be composed of a layer of ordinary glass and a layer of transparent heat-insulating coating: the structure is shown in schematic diagram 1: the thickness of the heat-insulating coating on the glass surface is 20-50 μm; the special function of nanoparticles The effect makes the coating not only achieve a transmittance of more than 70% in the visible light region, a shielding rate of more than 60% in the near-infrared region, and almost completely absorb and shield ultraviolet light.

The heat-insulating glass of the present invention can also be a hollow heat-insulating glass composed of a single-layer coating film and a double-layer glass: its structural diagram is shown in Figure 2: a double-layer glass substrate and a transparent heat-insulating coating, first of all, in one of the layers of glass The inner wall is coated with a transparent heat-insulating coating on the single-layer inner wall of the ordinary insulating glass by spraying (according to different usage occasions, the coating can be selected to be coated on the inner wall of the upper glass or the inner wall of the lower glass), among which the transparent heat-insulating coating The thickness of the hollow glass is 10-30μm. Due to the special effect of nanoparticles, the entire insulating glass can not only achieve a transmittance of more than 70% in the visible light region, but also a shielding rate of more than 60% in the near-infrared region, up to 80%. And its transmittance of ultraviolet light is lower than 2%. And it has good weather resistance, and its service life can reach more than 6 years under normal conditions.

The heat-insulating glass of the present invention can also be a hollow heat-insulating glass composed of two layers of coating film and two layers of glass. The schematic diagram of the structure is shown in Figure 3: the thickness of the transparent heat-insulating coating is 10-30 μm. Due to the special effect of nanoparticles, the entire insulating glass can not only achieve a transmittance of more than 70% in the visible light region, but also has a shielding effect in the near-infrared region. The rate reaches more than 65%, up to 80%, and the transmittance of ultraviolet light is lower than 2%. It has good weather resistance, and its service life can reach more than 6 years under normal conditions.

Beneficial effect:

1. The heat-insulating glass of the present invention can greatly improve its heat-insulating performance without substantially affecting the light-transmitting performance of the glass. With reference to relevant national standards, the basic properties of the nano-transparent heat-insulating coating of the present invention are measured, and the results prove that the heat-insulating glass of the present invention greatly improves its heat-insulating performance without affecting the basic properties of the original glass. The visible light transmittance of the insulating glass of the present invention is above 70%, and at the same time, several kinds of glasses of the present invention provide a near-infrared shielding rate of more than 60% and an ultraviolet shielding rate of more than 98%. Therefore, the heat-insulating glass coated with the nano-transparent heat-insulating coating of the present invention has properties such as transparency, ultraviolet shielding, infrared shielding, and heat insulation. Its comprehensive performance is superior to the prior art.

2. The preparation method of the present invention is relatively simple and low in cost, and its production cost is 1/3 of that of heat-insulating LOW-E glass.

Description of drawings

Figure 1 is a schematic diagram of the structure of a single-layer heat-insulating glass 1, wherein 1 is a nanometer transparent heat-insulating coating; 2 is ordinary glass.

Figure 2 is a schematic structural diagram of a single-layer coated insulating glass, and 3 is an air layer.

Fig. 3 Schematic diagram of the structure of double-coated insulating glass.

Detailed ways

The present invention will be described in detail below in conjunction with the examples and related diagrams. However, the invention is not limited to the examples given.

Example 1: Single-layer coated insulating glass, consisting of a layer of glass and a layer of coating film, the thickness of the coating film is 30 μm. The composition and structure of insulating glass are shown in Table 1 and Table 2:

Table 1 Structure of single-layer coated insulating glass

Table 2 Composition of transparent thermal barrier coating

Apply the transparent heat-insulating paint on the glass by brushing, and dry it under certain film-forming conditions to form a glass coated with a transparent heat-insulating coating film. This heat-insulating glass has good heat-insulating performance And visible light transmittance, after relevant tests and calculations, its performance can reach the performance of related LOW-E glass, and its ultraviolet light shielding rate reaches 98%. Other specific data are shown in Table 3:

Table 3 Optical/thermal insulation properties of glass coated with transparent thermal barrier coating

Example 2: Single-layer coated insulating glass, consisting of two layers of glass and a layer of coating film, the thickness of the coating film is 25 μm. The composition and structure of the insulating glass are shown in Table 4, and the composition and composition of the coating are shown in Table 5.

Table 4 Structure of single-layer coated insulating glass

Table 5 Composition of transparent thermal barrier coating

Apply the transparent heat-insulating coating on the glass by spraying, and dry it under certain film-forming conditions to form an insulating glass. (coating film on the inner wall), this kind of insulating glass has good heat insulation performance and visible light transmittance. After relevant tests and calculations, its performance can reach the performance of related LOW-E glass, and its ultraviolet light shielding rate reaches 98. %, see Table 6 for other specific data:

Table 6 Optical/thermal insulation properties of single-layer coated insulating glass

Example 3: Double-coated insulating glass, consisting of two pieces of glass coated with a transparent heat-insulating coating, the thickness of the two coatings are both 25 μm. The composition and structure of the insulating glass are shown in Table 7, and the composition and composition of the coating are shown in Table 8:

Table 7 Structure of double-coated insulating glass

Table 8 Composition of transparent thermal barrier coating

The transparent heat-insulating coating is coated on two pieces of glass respectively by spraying, and dried to form a film under certain film-forming conditions. ), this kind of insulating glass has good heat insulation performance and visible light transmittance. After relevant tests and calculations, its performance can reach the performance of related LOW-E glass, and its ultraviolet light shielding rate reaches 98%. Other specific data See Table 9:

Table 9 Optical/thermal insulation properties of double-layer coated insulating glass

Example 4: Single-layer coated insulating glass, consisting of single-layer glass and single-layer coating, the thickness of the coating is 45 μm. The composition and structure of insulating glass are shown in Table 10 and Table 11:

Table 10 Structure of single-layer coated insulating glass

Table 11 Composition of transparent thermal barrier coating

The transparent heat-insulating coating is coated on the glass by spraying, and dried under certain film-forming conditions to form a glass coated with a transparent heat-insulating coating film. This heat-insulating glass has good heat-insulating properties and Visible light transmittance, after relevant tests and calculations, its performance can reach the performance of related LOW-E glass, and its ultraviolet light shielding rate reaches 99%. Other specific data are shown in Table 12:

Table 12 Optical/thermal insulation properties of glass coated with transparent thermal barrier coating

Example 5: Double-coated insulating glass, consisting of two pieces of glass coated with a transparent heat-insulating coating, the thickness of the two coatings are both 12 μm. The composition and structure of insulating glass are shown in Table 13 and Table 14:

Table 13 Structure of double-coated insulating glass

Table 14 Composition of transparent thermal barrier coating

The transparent heat-insulating coating is coated on two pieces of glass respectively by spraying, and dried to form a film under certain film-forming conditions. ), this kind of insulating glass has good heat insulation performance and visible light transmittance. After relevant tests and calculations, its performance can reach or even exceed the performance of related LOW-E glass. Its ultraviolet light shielding rate reaches 99%. See Table 15 for specific data:

Table 15 Optical/thermal insulation properties of double-layer coated insulating glass

Attachment: The structure of insulating glass in the above description can refer to GB 11944-2002 insulating glass.

Claims (4)

1, a kind of transparent heat insulating glass is characterized in that being made up of one deck glass substrate and layer of transparent heat insulating coat, and wherein glass surface heat insulating coat thickness is 20～50 μ m; Or constitute by two layers of glass substrate and transparent heat-insulated coating, the inwall of one deck glass applies transparent heat-insulated coating at first therein, and the thickness of coating is 10～30 μ m; Or constitute by two layers of glass substrate and two layers of transparent heat-insulated coating, inwall in layer glass applies transparent heat-insulated coating at first respectively, the thickness of coating is 10～30 μ m, is made of two layers of glass then to have good heat-proof quality and the impregnable substantially hollow transparent heat-protecting glass of the transparency; The component and the parts by weight of wherein said heat insulating coat raw material are as follows:

Macromolecule resin 30～65

Nano-powder 5～20

Coatings additive(s) 1～10

Thinner 29～58.

2, transparent heat insulating glass according to claim 1 is characterized in that macromolecule resin is aqueous polyurethane or Resins, epoxy in the described coating; Nano-powder is for containing tin-antiomony oxide (ATO) or tin indium oxide (ITO) at least, and Z 250 (Fe ₃O ₄), titanium dioxide (TiO ₂), silicon-dioxide (SiO ₂) or zinc oxide (ZnO) in any one or any two kinds of combinations, particle size range is 20～80nm; Coatings additive(s) comprises a kind of of dispersion agent, flow agent, defoamer, film coalescence aid and thickening material at least; Thinner is water and/or alcohols.

3, transparent heat insulating glass according to claim 2 is characterized in that described dispersion agent is a kind of polymer-type anionic dispersing agents; Flow agent is acrylic copolymer or the polyether-modified polysiloxane of non-response type; Defoamer is a modified polyorganosiloxane; Film coalescence aid is ethylene glycol monobutyl ether/dipropylene glycol butyl ether mixture; Thickening material is the water-soluble dispersion liquid of a kind of hydroxyl acrylic.

4, transparent heat insulating glass according to claim 1 is characterized in that the transparent heat-insulated coating that will contain nanoparticle with the method that sprays and brush is coated on glass.

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