CN111483209A

CN111483209A - Preparation method of laminated glass

Info

Publication number: CN111483209A
Application number: CN201910603483.7A
Authority: CN
Inventors: 李大铭; 谷鋆鑫; 周冲
Original assignee: Saint Gobain Glass France SAS
Current assignee: Saint Gobain Glass France SAS; Compagnie de Saint Gobain SA
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-08-04

Abstract

The invention discloses a preparation method of laminated glass, which comprises the following steps: (a) providing a thermally insulating laminate on a glass substrate to form a coated glass substrate; (b) coating the protective slurry on the heat insulation laminated body, and forming a protective layer on the heat insulation laminated body through curing; (c) co-processing the coated glass substrate produced in step (b) with a further glass substrate to obtain a co-processed coated glass substrate and a processed further glass substrate; (d) removing the protective layer; (e) bonding the treated coated glass substrate and the treated additional glass substrate into a laminated glass. The protective layer of the invention is easier to remove after the hot bending process and is less likely to damage the thermal insulation layer.

Description

Preparation method of laminated glass

Technical Field

The invention relates to glass manufacturing, in particular to a preparation method of laminated glass.

Background

Currently, in the field of insulating glass, cesium tungsten bronze (Cs)_xWO₃) Is a potential material because it not only achieves good thermal insulation, but also is relatively low in cost. Insulating glass based on cesium tungsten bronze material has been marketed. However, the existing insulating glass cannot be used in the hot bending process, and the main problem is that the existing insulating glass is difficult to withstand the high temperature and high oxidation environment during the hot bending process.

In the conventional scheme of using cesium tungsten bronze as a thermal insulation layer, a cesium tungsten bronze precursor and a reducing gas (for example, N) are often used₂Ar and H₂). However, this approach using a cesium tungsten bronze precursor and a reducing gas is not possible in practical hot bending or tempering processes.

In addition, in some prior art techniques, the thermal barrier layer is protected during the hot bending process by sprinkling a layer of reducing protective powder on the thermal barrier layer. However, this method has the following disadvantages: 1. the reducing protective powder is difficult to be uniformly distributed, so that the color difference of the hot bent glass occurs; 2. the protective powder is easy to cause pollution and even explosion in the production process; 3 the protective powder layer is difficult to remove after being bent, and the protective powder can damage the heat insulation layer; 4. the thickness of the protective powder layer is difficult to control.

Disclosure of Invention

An object of the present invention is to overcome the above-mentioned drawbacks of the prior art and to provide a method for producing laminated glass.

According to one aspect of the present invention, there is provided a method of manufacturing laminated glass, comprising:

(a) providing a thermally insulating laminate on a glass substrate to form a coated glass substrate;

(b) coating the protective slurry on the heat insulation laminated body, and forming a protective layer on the heat insulation laminated body through curing;

(c) co-processing the coated glass substrate produced in step (b) with a further glass substrate to obtain a co-processed coated glass substrate and a processed further glass substrate;

(d) removing the protective layer;

(e) bonding the treated coated glass substrate and the treated additional glass substrate into a laminated glass.

Further, after the protective slurry is coated on the heat insulation laminated body, the protective layer is formed through heat curing, and the temperature range of the heat curing is 140-200 ℃.

Further, the protective slurry comprises: protective layer powder, solvent, dispersant, and thixotropic agent.

Preferably, the protective slurry comprises:

70-90% of protective layer powder, 9.00-29.75% of solvent, 9.00-29.75% of dispersant and 0.15-0.5% of thixotropic agent.

Further, the solvent comprises one or more of α -terpineol, low aromatic white spirit (low aromatic white spirit), propylene glycol methyl ether acetate (1-methoxy-2-acetoxypropyl), turpentine, ethanol, and isopropanol.

Preferably, the overcoat powder comprises one or more of the following ingredients: carbon powder, metal powder and reducing salt.

Further, the metal powder includes iron powder, zinc powder, aluminum powder or a combination thereof.

Further, the preparation process of the protective slurry comprises the following steps:

(1) stirring and mixing the solvent and the dispersant;

(2) adding the protective layer powder into the solvent while stirring;

(3) after the thixotropic agent is added to the solvent, stirring is continued for 0.5 to 1.5 hours.

Further, the thickness of the protective layer is about 0.01mm to 5mm, preferably about 0.1mm to 1 mm.

Further, the thermal insulation laminate comprises a thermal insulation layer comprising a thermal insulation material and a binder.

Further, the heat insulating material comprises composite tungsten oxide, and the composite tungsten oxide is represented by formula (1):

M_xWO_3-yA_y(1)

wherein M is an alkali metal element or an alkaline earth metal element, W is tungsten, O is oxygen, A is a halogen element, x is more than 0 and less than or equal to 1, and y is more than or equal to 0 and less than or equal to 0.5.

Wherein y is 0, and M is cesium.

Further, the fitting process is a thermal bending process.

According to an aspect of the present invention, there is provided a protective slurry, wherein the protective slurry comprises: protective layer powder, solvent, dispersant, and thixotropic agent.

Preferably, the protective slurry comprises: 70-90% of protective layer powder, 9.00-29.75% of solvent, 9.00-29.75% of dispersant and 0.15-0.5% of thixotropic agent.

Further, the protective layer powder comprises one or more of the following components: carbon powder, metal powder and reducing salt.

The invention has the advantages that the protective layer is formed on the thermal insulation laminated body in a mode of coating and curing the protective slurry, so that the thickness of the protective layer can be controlled. Meanwhile, the protective layer formed by curing the slurry is easier to remove after the hot bending process than a protective layer formed by manually scattering protective powder on the thermal insulation layer, and the thermal insulation layer is less prone to damage due to slurry coating. Meanwhile, the homogeneous slurry coating can ensure the uniformity of the distribution of the protective powder, thereby avoiding the problem of color difference after hot bending.

Drawings

The foregoing and other aspects of the present application will be more fully understood from the following detailed description, taken together with the following drawings. It is noted that the drawings may not be to scale for clarity of illustration and will not detract from the understanding of the present application. In the drawings:

FIG. 1 is a schematic view showing the structure of an insulating glass according to example 1 of the present invention.

FIG. 2 is a schematic view showing the structure of an insulating glass of example 4 of the present invention.

Detailed Description

General definitions and terms

The invention will be described in further detail below with the understanding that the terminology is intended to be in the nature of words of description rather than of limitation.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present application will control. When an amount, concentration, or other value or parameter is expressed in terms of a range, preferred range, or upper preferable numerical value and lower preferable numerical value, it is understood that any range defined by any pair of upper range limits or preferred numerical values in combination with any lower range limits or preferred numerical values is specifically disclosed, regardless of whether the range is specifically disclosed. Unless otherwise indicated, numerical ranges set forth herein are intended to include the endpoints of the ranges and all integers and fractions (decimal) within the range.

The terms "about" and "approximately," when used in conjunction with a numerical variable, generally mean that the value of the variable and all values of the variable are within experimental error (e.g., within 95% confidence interval for the mean) or within ± 10% of the specified value, or more.

The terms "optionally" or "optionally" as used herein mean that the subsequently described event or circumstance may or may not occur, and that the description includes instances where said event or circumstance occurs and instances where it does not, as well as instances where any of the subsequently described elements are selected.

Percentages, parts, etc. herein are by weight unless otherwise indicated.

The expressions "comprising" or similar expressions "including", "containing" and "having" and the like which are synonymous are open-ended and do not exclude additional, unrecited elements, steps or components. The expression "consisting of …" excludes any element, step or ingredient not specified. The expression "consisting essentially of …" means that the scope is limited to the specified elements, steps or components, plus optional elements, steps or components that do not materially affect the basic and novel characteristics of the claimed subject matter. It is to be understood that the expression "comprising" covers the expressions "consisting essentially of …" and "consisting of …".

The term "one or more" or "at least one" as used herein means one, two, three, four, five, six, seven, eight or more.

The term "two(s)" or "at least two" as used herein means two(s), three(s), four(s), five(s), six(s), seven(s), eight(s) or more(s).

The term "room temperature" as used herein means about 20-30 deg.C, e.g., about 25 deg.C.

The term "reducing salt" as used herein refers to a salt having reducing properties, examples of which include, but are not limited to, sulfites such as potassium sulfite.

Glass substrate

The "glass" used in the glass substrate is an amorphous inorganic nonmetallic material, and is generally made of various inorganic minerals (such as quartz sand, borax, boric acid, barite, barium carbonate, limestone, feldspar, soda ash, etc.) as main raw materials, and a small amount of auxiliary raw materials are added. Its main components are silicon dioxide and other oxides. The "glass" here may be ordinary glass whose chemical composition is Na₂SiO₃、CaSiO₃、SiO₂Or Na₂O·CaO·6SiO₂And the main component is silicate double salt which is amorphous solid with a random structure. The "glass" herein may be colored glass in which an oxide or salt of some metal is mixed to develop a color, tempered glass produced by a physical or chemical method, or the like. The glass substrate is typically transparent.

The glass substrate used by the invention also has good heat insulation performance, thereby further reducing the cost of the laminated glass.

The thickness of the glass substrate is a thickness generally used in the art, for example, about not less than 0.7mm, not less than 1.4mm, for example, about not more than 2.8mm, not more than 2.3mm, for example, about 0.7 to 2.8mm, 1.4 to 2.8mm, 0.7 to 2.3mm, such as about 2.1 mm. The laminated glass of the present invention is configured such that the TTS value is not significantly affected by the thickness of the glass substrate.

The glass substrates used in the present invention are not particularly different from each other in material selection. The size and shape of the glass substrate may vary depending on where the glass substrate is located.

In one embodiment, the laminated glass includes two glass substrates, a first glass substrate and a second glass substrate. In the case of a vehicle glazing, the glass located on the indoor side is defined as a first glass substrate. The glass located on the outdoor side is defined as the second glass substrate for a vehicle glazing. The material compositions of the first glass substrate and the second glass substrate are as described above, and there is no significant difference, and the first glass substrate and the second glass substrate may differ in size and shape depending on where the glass substrate is located (indoor side or outdoor side). For use, the first and second glass substrates are typically subjected to a mating process during the manufacturing process so that the two have matching and desired shapes.

Heat insulation laminate

The term "insulating laminate" as used herein means a single or multi-layer structure having insulating properties.

The thermal insulation laminate of the present invention includes a thermal insulation layer.

The heat insulating layer contains a heat insulating material and a binder.

The heat insulating material is a material having a function of reflecting or absorbing infrared rays, and preferably a material having a function of absorbing infrared rays, such as tungsten oxide composite.

In one embodiment of the invention, the insulating material comprises one or more of the following components: composite tungsten oxide, lanthanum boride, vanadium oxide, indium tin oxide, tin antimony oxide, and combinations of indium tin oxide and tin antimony oxide. When two or more insulating materials are used, the manner of bonding may be a physical combination or a chemical combination, for example, in the form of a blend of the above two or more insulating materials, or in the form of a laminate of the above two or more insulating materials, such that there are two or more insulating layers using different insulating materials in the insulating laminate.

In a preferred embodiment, the thermal insulation material comprises composite tungsten oxide.

In a more preferred embodiment, composite tungsten oxide is used as the thermal insulating material.

In one embodiment, the tungsten oxide composite is represented by formula (1):

M_xWO_3-yA_y(1)

M is an alkali metal element or an alkaline earth metal element, examples of which are lithium (L I), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), or any combination thereof, A is a halogen element, examples of which are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), or any combination thereof.

In a further embodiment, the tungsten oxide composite is represented by formula (2),

M_xWO₃(2)

wherein M, x, W and O are as defined above.

In the formula (2), that is, in the formula (1), y is 0, that is, the composite tungsten oxide does not contain a halogen element.

In a more preferred embodiment, the tungsten oxide complex is represented by formula (1), wherein y is 0 and M is cesium.

In another more preferred embodiment, the tungsten oxide composite is represented by formula (1), wherein x is from about 0.27 to about 0.33.

The tungsten oxide composite may be commercially available, for example, Cs available from Sumitomo metals, Japan_xWO₃。

The adhesive can be used for combining the heat-insulating materials together, thereby effectively increasing the mechanical property and the wear resistance of the heat-insulating layer and avoiding being removed in the subsequent processing process of the glass substrate. In one embodiment, the binder comprises one or more of the following ingredients: silica, titania and alumina. Preferably silica.

In one embodiment, the weight ratio of binder to insulating material in the insulation layer is such that the insulation layer has good insulation and mechanical properties. Too little binder content may degrade the mechanical properties of the insulation layer, and too much binder content may deteriorate the thermal insulation properties of the insulation layer. In one embodiment, the weight ratio of binder to insulation material in the insulation layer is from about 1:1 to 1:1000, preferably from about 1:10 to 1:200, and more preferably about 1: 100.

The insulating layer should have a suitable thickness. The thickness of the thermal insulation layer should not be too thin so that the thermal insulation layer has a good thermal insulation effect. But should not be too thick to ensure that the visible light transmittance of the thermal insulation layer is above about 70%. The thickness of the thermal barrier layer of the present invention is about 50nm to 50 μm, preferably about 500nm to 5 μm, for example about 1 μm.

Preparation method of laminated glass

The invention also relates to a method for preparing the laminated glass, which comprises the following steps:

(b) coating the protective slurry on the heat insulation laminated body, and forming a protective layer through curing;

(d) removing the protective layer;

Step (a)

Specifically, step (a)The method comprises the following steps:

(a1) providing a barrier layer on the glass substrate and curing;

(a2) providing a thermal barrier layer on the barrier layer and curing;

(a3) optionally post-curing the product obtained in (a 2).

In step (a), a glass substrate is used as a base for disposing the heat insulating laminate. The thermal barrier laminate is disposed on a glass substrate to obtain a coated glass substrate.

Specifically, in the step (a1), the barrier layer solution is applied to the surface of the glass substrate and cured to form the barrier layer. The coating is preferably carried out by roll coating. The glass substrate being coated may be the first and/or second glass substrate depending on the structural arrangement of the final laminated glass.

Preferably, the barrier layer solution comprises one or more of the following components: silica, titania and alumina. The purity of the silicon dioxide, the titanium dioxide and the aluminum oxide with single components is more than or equal to 99 percent. The compactness of the formed barrier layer is more than or equal to 90 percent.

In a specific embodiment, in step (a1), the barrier layer solution is a solution of the corresponding ingredients to facilitate coating. When silica is used, a silica solution or sol may be used. The silica sol is obtained by the following preparation method: mixing and stirring tetraethoxysilane and hydrochloric acid, wherein the weight ratio of tetraethoxysilane to hydrochloric acid is about 5: 1-1: 50, stirring conditions of about 15-25 ℃, and stirring time of about 4-10 hours. The speed of coating can have an effect on the thickness of the barrier layer. In one embodiment, the conveyor speed is about 5 to 15m/min while coating is being performed. The rubber roller speed is about 5-15 m/min. Curing may include thermal curing (e.g., baking). In step (a1), the temperature of curing is about 80-250 ℃, e.g., about 100, 200 ℃. The curing time is about 3s to 60s, for example about 10, 15 s. In one embodiment, the barrier layer has a thickness of about 5nm to 500nm, preferably about 10nm to 200nm, for example about 100 nm. In some embodiments, the curing may also be other methods, such as ultraviolet curing.

In step (a2), a thermal barrier layer is provided on the barrier layer. A solution or dispersion of a heat insulating material and a mixed solution of a binder solution may be applied to the surface of the barrier layer and cured to form the heat insulating layer. The coating process is preferably carried out by roll coating.

In a specific embodiment, in step (a2), the binder solution is a solution of the corresponding ingredients to facilitate coating. When silica is used, a silica solution or sol may be used. The silica sol is as described above. The silica sol is mixed with a dispersion of the heat insulating material. The dispersion of the thermal insulation material should have a suitable solids content so that it has a good thermal insulation effect, while the influence on the light transmittance, in particular the visible light transmittance, remains within acceptable ranges. In one embodiment, the dispersion of the thermal insulation material has a solids content of about 5-50%. In another embodiment, the weight ratio of silica to insulation is from about 1:1 to 1:1000, preferably from about 1:10 to 1:200, more preferably about 1: 100. The speed of coating can have an effect on the thickness of the thermal barrier layer. In one embodiment, the conveyor speed is about 5-15m/min and the roller speed is about 5-15m/min while coating is being performed. In step (a2), the temperature of curing is about 80-250 ℃, e.g., about 100, 200 ℃. The curing time is about 3s to 60s, for example about 15, 20 s. In one embodiment, the thickness of the thermal barrier layer is from about 50nm to 50 μm, preferably from about 500nm to 5 μm, for example about 1 μm.

In other embodiments, methods other than roll coating may be used to perform the coating process described above. For example, spin coating (spin coating), casting (casting), bar coating (bar coating), blade coating (blade coating), wire bar coating (wire bar coating), dip coating (dip coating), and the like can be used.

In step (a3), post-curing is an optional curing step after curing of the barrier layer and curing of the thermal barrier layer are completed. Post-curing can remove organic residues and enhance the bond strength between layers and with the glass substrate. The post-cure temperature should be below the temperature at which oxidation of the insulation material occurs. In one embodiment, the post-cure temperature is about 200-400 ℃. The post-curing time is about 30s-120 min.

Step (b)

The protective slurry is applied to the heat insulating laminate and cured to form a protective layer.

The protective layer is applied between the insulating laminate of the coated glass substrate and the additional glass substrate so that the insulating material is not oxidized during the mating process. Coating methods of the protective slurry include spin coating (spinning), casting, bar coating (bar coating), blade coating (blade coating), wire bar coating (wire bar coating), dip coating (dip coating), and the like.

The thickness of the protective layer can be controlled by forming the protective layer on the thermal insulation laminate in a form cured after the protective slurry is coated. Meanwhile, the protective layer formed by curing the slurry is easier to remove after the hot bending process than a protective layer formed by manually scattering protective powder on the thermal insulation layer, and the thermal insulation layer is less prone to damage due to slurry coating. Meanwhile, the homogeneous slurry coating can ensure the uniformity of the distribution of the protective powder, thereby avoiding the problem of color difference after hot bending.

The protective layer means a layer formed of powder for protection. The protective paste contains protective layer powder, and the protective layer powder can form a protective layer on the heat insulating laminated body by removing the solvent in the protective paste through curing. The protective layer powder should have good reducibility, not react with a material in contact therewith, such as glass, a heat insulating material of a heat insulating layer, such as composite tungsten oxide, a binder, such as silica, and be less liable to cause danger at high temperatures. Curing may include thermal curing (e.g., baking). In some embodiments, the curing may also be other methods, such as ultraviolet curing.

In some embodiments, the protective slurry is coated on the thermal insulation laminate and then thermally cured to form a protective layer at a temperature ranging from 140 to 200 ℃. the protective slurry may include protective layer powder, a solvent, a dispersant, and a thixotropic agent, in some embodiments, the protective slurry includes 70 to 90% by mass of the protective layer powder, 9.00 to 29.75% by mass of a solvent, 9.00 to 29.75% by mass of a dispersant, and 0.15 to 0.5% by mass of a thixotropic agent, wherein the solvent may include one or more of α -terpineol, low aromatic white spirit (low aromatic white spirit), propylene glycol methyl ether acetate (1-methoxy-2-acetoxy), turpentine, ethanol, and isopropanol, and wherein the protective slurry is prepared by:

(1) stirring and mixing the solvent and the dispersant;

(2) adding the protective layer powder into the solvent while stirring;

The protective layer powder comprises one or more of the following components: carbon powder, metal powder and reducing salt. The metal powder is preferably a metal powder having reducibility, and includes, but is not limited to, iron powder, zinc powder, aluminum powder, magnesium powder, titanium powder, or a combination thereof, and more preferably includes iron powder, zinc powder, aluminum powder, or a combination thereof. Examples of reducing salts include, but are not limited to, sulfites such as potassium sulfite. The particle size of the protective layer powder is usually about 150-300 mesh, for example about 100-200 mesh.

Step (c)

Co-processing the coated glass substrate produced in step (b) with another glass substrate to obtain a processed coated glass substrate and a processed other glass substrate.

Additional glass substrates are provided. The additional glass substrate is a glass substrate for subsequent mating processing. For example, when the glass substrate used in the coated glass substrate is a first glass substrate, the additional glass substrate treated therewith is a second glass substrate. When the glass substrate used in the coated glass substrate is the second glass substrate, the additional glass substrate treated therewith is the first glass substrate.

The additional glass substrate may also optionally be a glass substrate coated as described in step (a).

The fitting process can match the formation dimensions between the glass substrates (i.e., the first glass substrate and the second glass substrate) to each other, having a desired shape dimension. In the step (c), the matching process includes a high temperature matching process, such as a hot bending process at a high temperature. The temperature of the hot-bending process is within a temperature range generally known in the art, such as about 500 ℃ and 680 ℃, for example about 650 ℃.

Step (d)

And removing the protective layer.

It should be noted that the coated glass substrate is only physically attached to the other glass substrate during the mating process, and thus can be easily separated after the mating process to facilitate removal of the protective layer.

After the mating treatment, the treated coated glass substrate is separated from the treated additional glass substrate and the protective layer is removed. Removal is carried out using means generally known in the art, such as direct bulk removal.

Because the protective layer is made by curing the slurry, compared with the protective layer formed by directly manually scattering the protective powder, the protective layer has better integrity, is easier to remove in a whole block, does not need to be removed by washing or blowing, and avoids the damage of the protective powder particles to the heat-insulating layer.

Step (e)

Bonding the treated coated glass substrate and the treated additional glass substrate into a laminated glass.

Advantageous effects

The invention has the advantages that the protective layer is formed on the thermal insulation laminated body in a mode of coating and curing the protective slurry, so that the thickness of the protective layer can be controlled. Meanwhile, the protective layer formed by curing the slurry is more easily removed after the hot bending process than a protective layer formed by manually scattering protective powder on the heat insulating layer, and the heat insulating laminate is not easily damaged due to the slurry coating. Meanwhile, the homogeneous slurry coating can ensure the uniformity of the distribution of the protective powder, thereby avoiding the problem of color difference after hot bending.

Examples

The following specific examples are given to illustrate the laminated glass of the present invention and the method of preparing the same, but are not to be construed as limiting the same.

The main reagents are as follows:

tetraethoxysilane (TEOS) was purchased from Chemicals, Inc., national drug group

Cesium tungsten bronze is available from sumitomo metals, japan.

The dispersant was BYK-111, a Bick Germany and the thixotropic agent was BYK-410, a Bick Germany.

The main apparatus is as follows:

roller coating apparatus was purchased from Shanghai Mingshou mechanics Ltd

EXAMPLE 1 coating of Heat insulating laminates

First-step coating:

tetraethoxysilane (TEOS) and hydrochloric acid (HCl) having a pH of 2, each of which was 2kg, were mixed and stirred to prepare a silica solution, and the stirring conditions were room temperature (25 ℃), for 4 hours.

The silica solution was coated on the glass substrate by roll coating. The purity of the silica was 99%. The speed of the conveyor belt is 10m/min, and the speed of the rubber roller is 12 m/min. And drying at 100 ℃ for 10s after coating is finished, thereby forming the barrier layer. The solidity of the barrier layer was 90%. The thickness of the barrier layer was 100 nm.

And a second step of coating:

the silica solution was mixed with a cesium tungsten bronze solution. The solid content of the cesium tungsten bronze solution was 20%. The weight ratio of silica to cesium tungsten bronze in the mixed solution was 1: 100.

The mixed solution was coated on the barrier layer on the glass substrate by roll coating. The conveyor belt speed was 14m/min and the rubber roll speed was 14 m/min. And drying at the temperature of 100 ℃ for 20s after coating is finished, thereby forming the heat-insulating laminated body. The thickness of the thermal insulation layer was 1 μm.

A laminated glass of example 1 was obtained according to the above method, comprising: a glass substrate 10; a barrier layer 11 on a glass substrate 10, and a thermal barrier laminate 12 on the barrier layer 11 (see fig. 1).

EXAMPLE 2 preparation of protective slurry

200g of α -terpineol and 1g of BYK-111 dispersant are mixed and then mechanically stirred for 5 minutes at the rotating speed of 200r/min to obtain a homogeneous solution, 800g of iron powder (1500 meshes, the average particle size is 10 mu m) is added into the homogeneous solution and mechanically stirred at the speed of 400r/min until a uniform suspension is obtained, 1.5g of BYK-410 thixotropic agent is added into the iron powder suspension at the rotating speed of 400r/min while mechanically stirring, and after the thixotropic agent is added, the protective slurry is mechanically stirred for 30 minutes at the rotating speed of 450r/min to obtain the protective slurry.

EXAMPLE 3 protective slurry application and protective layer formation

Before the protective slurry is coated, the protective slurry is mechanically stirred for 5 minutes at the rotating speed of 450r/min, so that the protective slurry is uniformly distributed, and the uniformity of a protective layer formed at the later stage is ensured. On the basis of the embodiment 1, a layer of protective slurry is coated on the heat-insulating layer 12 of the heat-insulating glass, and after the protective slurry is coated in a scraper coating mode, the heat-insulating glass is placed into an oven at 150 ℃ to be dried by a solvent to form a protective layer.

Example 4-provision of additional glass substrates and Hot bending

On the basis of example 3, a cover glass was provided on the cover glass, and the cover glass was a commercially available ordinary glass having a thickness of 2.1 mm. The insulating glass of example 3 obtained in the above manner further includes a protective layer 13 on the insulating layer 12 and a protective glass 14 on the protective layer 13 (see fig. 2) in addition to the insulating glass shown in fig. 1. And then performing a hot bending process.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. The preparation method of the laminated glass is characterized by comprising the following steps:

(d) removing the protective layer;

(e) bonding the co-processed coated glass substrate and the co-processed additional glass substrate into a laminated glass.

2. The method of claim 1, wherein the curing in step (b) is thermal curing, and the temperature range of thermal curing is 140-200 ℃.

3. The method of claim 1, wherein the protective slurry comprises:

protective layer powder, solvent, dispersant, and thixotropic agent.

4. The method of claim 3, wherein the protective slurry comprises:

5. The method of claim 3, wherein the solvent comprises one or more of the following:

α -terpineol, low aromatic white spirit (low aromatic white spirit), propylene glycol methyl ether acetate (1-methoxy-2-acetoxy propyl ether), turpentine, ethanol, and isopropanol.

6. The method of claim 3, wherein the overcoat powder comprises one or more of the following: carbon powder, metal powder and reducing salt.

7. The method of claim 6, wherein the metal powder comprises iron powder, zinc powder, aluminum powder, or a combination thereof.

8. The method of claim 3, wherein the protective slurry is prepared by:

(1) stirring and mixing the solvent and the dispersant;

(2) adding the protective layer powder into the solvent while stirring;

9. The method of claim 1, wherein the protective layer has a thickness of about 0.01mm to 5mm, preferably about 0.1mm to 1 mm.

10. The method of claim 1, the thermal insulation laminate comprising a thermal insulation layer comprising a thermal insulation material and a binder.

11. The process for producing laminated glass according to claim 10,

the heat-insulating material comprises a composite tungsten oxide,

the composite tungsten oxide is shown as a formula (1):

M_xWO_3-yA_y(1)

12. The process for producing laminated glass according to claim 11,

y is 0, and/or

M is cesium.

13. The method of producing laminated glass according to claim 11, wherein the fitting treatment is a thermal bending treatment.

14. A protective slurry, wherein the protective slurry comprises:

protective layer powder, solvent, dispersant, and thixotropic agent.

15. The protective slurry of claim 14, wherein the protective slurry comprises:

16. The protective slurry of claim 14 wherein the solvent comprises one or more of α -terpineol, low aromatic white spirit (low aromatic white spirit), propylene glycol methyl ether acetate (1-methoxy-2-acetoxypropyl), turpentine, ethanol, isopropanol.

17. The protective slurry of claim 14, wherein the protective layer powder comprises one or more of the following ingredients: carbon powder, metal powder and reducing salt.