CN114031994B - Special top coating composition for transparent aerogel and preparation method and application thereof - Google Patents
Special top coating composition for transparent aerogel and preparation method and application thereof Download PDFInfo
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- CN114031994B CN114031994B CN202111554189.5A CN202111554189A CN114031994B CN 114031994 B CN114031994 B CN 114031994B CN 202111554189 A CN202111554189 A CN 202111554189A CN 114031994 B CN114031994 B CN 114031994B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2231—Oxides; Hydroxides of metals of tin
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K3/2279—Oxides; Hydroxides of metals of antimony
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention provides a special top-coat coating composition for transparent aerogel, a preparation method and an application thereof, wherein the special top-coat coating composition for transparent aerogel comprises the following components in parts by weight: 10-15 parts of nanoscale reflecting substance, 40-60 parts of acrylic emulsion, 3-5 parts of film-forming additive, 1-2 parts of thickening agent, 1-2 parts of anti-freezing additive, 0.3-0.5 part of bactericide, 0.1-0.3 part of pH value regulator, 0.2-0.5 part of defoaming agent and 25-40 parts of water; the special top-coat coating composition for the transparent aerogel, provided by the invention, can protect an aerogel coating from being polluted and damaged, can improve the functions of the reflection ratio and the heat preservation performance of a system, has high light transmittance, and can fully show the fine and light decorative effect of an aerogel middle coating, particularly a heat preservation and decoration integrated aerogel coating, and the decorative effect is rich in shape.
Description
Technical Field
The invention relates to the field of high polymer materials, and in particular relates to a special top coating composition for transparent aerogel and a preparation method and application thereof.
Background
The aerogel is a novel material with a nano-porous structure and has great application value. The aerogel can be divided into silica aerogel, alumina aerogel, zirconia aerogel, carbon aerogel and the like according to different components. The technology of the silica aerogel is the most mature at the present stage, the industrialization degree is the highest, the nano-pore super heat-insulating material has practical value, and the silica aerogel also has good heat insulation and mechanical properties, and is mainly applied to heat preservation and heat insulation in the fields of aerospace, military, electronics, buildings, household appliances, industrial pipelines and the like.
The transparent material can fully show the fine and light decorative effect of the aerogel intermediate coat and rich in modeling, and can protect the aerogel coat from being polluted and damaged, and the special formula enables the transparent finish coat to have the functions of improving the system reflectance and the heat preservation performance, and the light transmittance is high, so that the decorative effect of the aerogel intermediate coat, particularly the heat preservation and decoration integrated aerogel coating, can be better shown.
CN113214740A discloses a light-reflecting transparent heat-insulating coating, a preparation method thereof and a light-reflecting heat-insulating cover coat, wherein the light-reflecting transparent heat-insulating coating comprises the following components in parts by mass: 50-60 parts of polymer emulsion, 10-15 parts of light reflection heat insulation powder and 25-35 parts of water, wherein the light reflection heat insulation powder is silver modified bismuth titanate nano powder. The light-reflecting transparent heat-insulating coating provided by the invention adopts silver modified bismuth titanate nano powder as a filler, and the transparent reflecting heat-insulating coating is prepared by the characteristics of low visible light reflection degree and high near infrared reflection degree of the silver modified bismuth titanate nano powder, so that on the premise of not influencing light transmission, near infrared light can be directly reflected, the heat-insulating property can be improved, the irreversible damage and potential safety hazard caused by overhigh coating temperature of a radiation-absorbing transparent heat-insulating coating can be avoided, and a brand new solution of the reflecting heat-insulating coating is provided for building energy conservation. However, the product has low efficiency of reflection heat insulation and unsatisfactory light transmittance.
CN106560495B discloses a clear coating composition for hot stamping films comprising: a main material part comprising 50 to 60 wt% of an epoxy-denatured acrylic resin, 10 to 15 wt% of an acrylic resin, 5 to 10 wt% of a polyester polyol, 0.1 to 1.5 wt% of a reaction catalyst, 0.1 to 1 wt% of a wetting additive, 1 to 2 wt% of a light stabilizer, and 20 to 30 wt% of a solvent; and a hardener part comprising 90 to 99 wt% of a hexamethylene diisocyanate trimer based hardener and 1 to 10 wt% of a reactive silicone hardener, wherein the main material part and the hardener part are mixed in a weight ratio of 2.0:1 to 4.0: 1. The product is a bi-component, is inconvenient to use, has poor weatherability of epoxy resin, and is not suitable for building coatings, especially exterior wall building coatings.
The existing transparent coating has different defects, so how to develop a novel formula to well combine the finish coating with a nanoscale reflecting substance to achieve excellent effects of transparent reflection, heat preservation and the like, and the coating has good combinability with the aerogel middle coating, especially with the heat preservation and decoration integrated aerogel coating, can better show the decoration effect, and has important value for the application of the transparent heat preservation coating.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a special finishing coating composition for transparent aerogel and a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a special transparent aerogel overcoat composition, which comprises the following components in parts by weight:
the nanoscale reflective material may be, for example, 10 to 15 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, or the like.
Preferably, the nanoscale reflecting substance is nano tin antimony oxide (ATO) doped with nano silver, the main effective component is metal oxide nano ultrafine particle powder formed by mixing tin oxide, antimony oxide and nano silver according to the mass ratio of 90:8:2, and the nano material has the functions of transparent conductivity, reflective heat insulation, ultraviolet resistance and the like and can be applied to various scenes. When the solar radiation reaches the surface of the coating, most near infrared light and little visible light are reflected, meanwhile, part of visible light and little near infrared light can penetrate through the coating and enter the bottom layer, so that the temperature of the bottom layer is reduced, and meanwhile, good light transmittance in the visible region can be maintained. In addition, due to the low emissivity in the far infrared region and the matched aerogel bottom coating, the coating can effectively prevent indoor heat from being transferred to the outside in the solar terms or winter mainly comprising heating.
The acrylic emulsion may be 40 to 60 parts, for example, 40 parts, 45 parts, 50 parts, 55 parts, or 60 parts.
The film-forming assistant is 3 to 5 parts, for example, 3, 4 or 5 parts.
The thickener is 1 to 2 parts, for example, 1 part or 2 parts.
The amount of the antifreeze additive is 1 to 2 parts, for example, 1 part or 2 parts.
The amount of the bactericide is 0.3 to 0.5 parts, for example, 0.3 part, 0.4 part, or 0.5 part.
The pH adjustor is 0.1 to 0.3 parts, for example, 0.1 part, 0.2 part, or 0.3 part.
The defoaming agent is 0.2 to 0.5 part, and may be, for example, 0.2 part, 0.3 part, 0.4 part, or 0.5 part.
The amount of water is 25 to 40 parts, and may be, for example, 25 parts, 30 parts, 35 parts, or 40 parts.
Preferably, the coalescing agent is an alcohol ester dodecanol.
Preferably, the thickener is a polyurethane thickener RM-8W.
Preferably, the antifreezing agent is any one of FT-100, propylene glycol or ethylene glycol or a combination of at least two of the two.
Preferably, the bactericide is any one of chloromethyl isothiazolinone, methyl isothiazolinone, octyl isothiazolinone or benzisothiazolinone or the combination of at least two of them.
Preferably, the pH value regulator is any one or combination of at least two of 2-amino-2-methyl-1-propanol, sodium hydroxide or ammonia water.
Preferably, the antifoaming agent is Tego Foamex 825.
Preferably, the transparent aerogel specialized overcoat composition further comprises a transparency aid;
preferably, the transparent auxiliary agent is pure-phase nano optical transparent agent A-930 which can be purchased from commercial sources.
Preferably, the mass of the transparent auxiliary agent is 2% to 5% of the mass of the nanoscale reflective material, for example, 2%, 3%, 4%, or 5%, preferably 3% to 4%. The dosage of the transparent auxiliary agent is reasonably matched with the dosage of the nano-scale reflecting substance, and the transparent auxiliary agent within the mass proportion range is preferably used, so that the transparent effect can be better realized.
In the present invention, the addition amount of the transparent aid affects the transparency effect and the reflection effect. If the addition amount of the pure-phase light transparent agent is too high, the cost is increased, and meanwhile, the light transmittance and the reflection effect are influenced to a certain extent, and if the addition amount of the pure-phase light transparent agent is too low, the effect of increasing the light transmittance cannot be achieved.
In a second aspect, the present invention provides a method for preparing a special transparent aerogel top coating composition according to the first aspect, wherein the method comprises: mixing a nanoscale reflecting substance, an acrylic emulsion, a film-forming aid, a thickening agent, an anti-freezing aid, a bactericide, a pH value regulator, water and an optional transparent aid to obtain the special transparent aerogel finishing coating composition.
In a third aspect, the present invention provides a use of a special transparent aerogel overcoat composition as described in the first aspect in light reflecting surfaces. In particular to application to the thermal insulation and decoration integrated aerogel coating.
Has the advantages that: the special top facing coating composition of transparent aerogel can protect the aerogel coating not contaminated and destruction, more can improve system reflectance and thermal insulation performance's function, and the luminousness is high, can reach more than 94% the highest, and is better to sunlight reflection effect, can fully show the especially fine and smooth light, the molding rich decorative effect of heat preservation decoration integration aerogel coating self of aerogel floating coat.
Detailed Description
In order to better illustrate the present invention and facilitate the understanding of the technical solutions, the present invention is further described in detail below.
Example 1
The embodiment provides a special top-coating composition for transparent aerogel, which comprises the following components in parts by weight:
13 parts of nano-silver doped nano tin antimony oxide nano-reflective substance, 48 parts of acrylic emulsion, twelve 4 parts of alcohol ester, 2 parts of polyurethane thickener RM-8W, 2 parts of propylene glycol, 0.4 part of chloromethyl isothiazolinone, 0.2 part of 2-amino-2-methyl-1-propanol, 8250.4 parts of defoamer Tego Foamex, 30 parts of water and 3% of gold full-pure-phase light transparent agent A-930 by mass.
Example 2
The embodiment provides a special top coating composition for transparent aerogel, which comprises the following components in parts by weight:
10 parts of nano-silver doped nano tin antimony oxide nano-reflective substance, 60 parts of acrylic emulsion, twelve 3 parts of alcohol ester, 1 part of polyurethane thickener RM-8W, 2 parts of ethylene glycol, 0.5 part of methylisothiazolinone, 0.5 part of sodium hydroxide, 78 parts of defoamer Tego Foamex 8250.5, 25 parts of water, and 4% of gold full-pure-phase light transparent agent A-930 by mass.
Example 3
The embodiment provides a special top coating composition for transparent aerogel, which comprises the following components in parts by weight:
15 parts of nano-silver doped nano tin antimony oxide nano-reflective substance, 40 parts of acrylic emulsion, twelve 5 parts of alcohol ester, 2 parts of polyurethane thickener RM-8W, 2 parts of FT-100, 0.3 part of octyl isothiazolinone, 0.1 part of 2-amino-2-methyl-1-propanol, 8250.2 parts of defoamer Tego Foamex, 40 parts of water and 2% of gold full-pure phase light transparent agent A-930 by mass.
Example 4
The embodiment provides a special top coating composition for transparent aerogel, which comprises the following components in parts by weight:
12 parts of nano-silver doped nano tin antimony oxide nano-reflective substance, 55 parts of acrylic emulsion, twelve 5 parts of alcohol ester, 1 part of polyurethane thickener RM-8W, 2 parts of propylene glycol, 0.4 part of benzisothiazolone, 0.1 part of ammonia water, 8250.5 parts of defoamer Tego Foamex, 35 parts of water and 5% of gold all-pure phase light transparent agent A-930 by mass.
Example 5
This example differs from example 1 only in that the defoamer was not included in this example, and the rest was the same as example 1.
Example 6
The difference between this example and example 1 is that the film forming aid in this example is OE-300, and the rest is the same as example 1.
Example 7
The present example is different from example 1 only in that the transparent auxiliary agent in the present example has a mass of 1% of the nano-scale reflective material, and the rest is the same as example 1.
Example 8
This example is different from example 1 only in that it does not contain a pH adjuster, and the rest is the same as example 1.
Example 9
The present example is different from example 1 only in that the weight part of the nano-scale reflective material in the present example is 5 parts, and the rest is the same as example 1.
Example 10
This example differs from example 1 only in that the antifreeze is not contained in this example, and the rest is the same as example 1.
Comparative example 1
This comparative example is different from example 1 only in that the present example does not contain a nano-scale reflective substance, and the rest is the same as example 1.
Comparative example 2
The comparative example is different from example 1 only in that the weight part of the nano-sized reflective material in this example is 25 parts, and the rest is the same as example 1.
Comparative example 3
This comparative example is different from example 1 only in that the transparent auxiliary is not contained in this example, and the rest is the same as example 1.
Comparative example 4
The comparative example is different from example 1 only in that the transparent auxiliary agent in this example has 6% by mass of the nano-sized reflective material, and the rest is the same as example 1.
The transparent aerogel special-purpose overcoat compositions provided in examples 1 to 10 and comparative examples 1 to 4 were coated on the surface of the colored aerogel, and a performance test was performed. The test results are shown in table 1 below:
the test method comprises the following steps:
the reflective and thermal insulation properties of the decorative common colored aerogel used as a substrate were first tested, and the test results are shown in table 1 below.
The substrate was then coated with a special top coating of transparent aerogel and tested for reflective and thermal insulation properties, the results of which are shown in table 2 below. The difference value can reflect the improvement effect of the special top-coat coating for the transparent aerogel on the reflective heat insulation performance.
The reflective insulation performance test refers to the standard of JGT 235-2014 reflective insulation coating for buildings, the solar reflectance and the near infrared reflectance are taken as main characterization parameters, and the L value represents the color depth.
TABLE 1
TABLE 2
As can be seen from the results in tables 1 and 2, the special top coating composition for transparent aerogel provided by the invention has good light transmittance and excellent reflection and heat insulation effects after being coated on a base material. The results of example 1 show that the components are reasonably matched and have better performance. However, in example 2, a certain amount of nano-scale reflecting substances are reduced, the emulsion content and the transparent auxiliary agent are increased, the light transmittance is reduced, and meanwhile, the cracking phenomenon of low-temperature film forming is caused due to insufficient addition of the alcohol ester; in the embodiment 3, the nano-scale reflecting substance and the alcohol ester twelve are added, the emulsion and the transparent auxiliary agent are reduced, the reflective heat-insulating property can be obviously improved, but the light transmittance is reduced, and meanwhile, the water resistance is poor; in example 4, the nano-scale reflecting substances are reduced, the emulsion and the transparent auxiliary agent are added, and the light transmittance and the reflective heat-insulating property are reduced at the same time; therefore, the performance of the special finishing coating composition for the transparent aerogel is different under the matching of different formula proportions, and the formula provided in example 1 is better.
In the embodiment 5, the defoaming agent is not contained, so that the reflective heat-insulating property is not obviously influenced, but the surface of the coating film has more cells and poor construction effect, and the light transmittance is slightly reduced; OE-300 in example 6 had no effect on reflective insulation performance and light transmittance; in example 7, the content of the transparent auxiliary was low, and the reflective and heat-insulating properties were improved, but the light transmittance was low.
In example 8, the coating composition does not contain a pH adjuster and has no influence on the reflective heat-insulating property and light transmittance, but the storage stability of the coating composition is affected by a low pH value.
In example 9, the amount of the nano-sized reflecting material added was insufficient, and the reflective insulation effect was not obtained.
Example 10 does not contain an antifreeze, and does not greatly affect the overall light transmittance, but does affect the use thereof under low temperature conditions.
Comparative example 1 does not contain a nano-scale reflecting substance, and the special top-coat coating composition for the transparent aerogel loses the reflecting effect; in comparative example 2, the content of the nano-scale reflective material is too high, which can significantly improve the reflective insulation performance, but seriously reduce the light transmittance, increase the cost, and is not beneficial to improving the overall performance of the coating composition, so the content of the nano-scale reflective material is controlled within a reasonable range.
The comparative example 3 does not contain a transparent additive, and does not have the effect of increasing the light transmittance of the special finishing coating composition for the transparent aerogel; in comparative example 4, the content of the transparent assistant was too high, but the light transmittance was lowered, so that the content of the transparent assistant was controlled within a reasonable range.
The present invention is illustrated by the above-mentioned examples, but the present invention is not limited to the above-mentioned detailed process equipment and process flow, i.e. it is not meant to imply that the present invention must rely on the above-mentioned detailed process equipment and process flow to be practiced. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (9)
1. The special top coating composition for the transparent aerogel is characterized by comprising the following components in parts by weight:
a transparent auxiliary agent gold full-pure phase light transparent agent A-930; relative to the nano-scale reflecting substance, the mass of the gold full-pure phase light transparent agent A-930 is 3-4% of that of the nano-silver doped nano-tin antimony oxide.
2. The transparent aerogel specialty overcoat composition of claim 1, wherein said coalescent is an alcohol ester dodeca.
3. The transparent aerogel specialized overcoat composition of claim 1, wherein the thickener is a polyurethane thickener RM-8W.
4. The transparent aerogel specialty overcoat composition of claim 1, wherein said freeze protection additive is any one or a combination of at least two of FT-100, propylene glycol, or ethylene glycol.
5. The transparent aerogel specialty overcoat composition of claim 1, wherein said biocide is any one or a combination of at least two of chloromethylisothiazolinone, methylisothiazolinone, octylisothiazolinone, or benzisothiazolinone.
6. The transparent aerogel specialized overcoat composition of claim 1, wherein the pH adjusting agent is any one or a combination of at least two of 2-amino-2-methyl-1-propanol, sodium hydroxide, or ammonia.
7. The transparent aerogel specialty overcoat composition of claim 1 wherein said defoamer is Tego Foamex 825.
8. The method of preparing a transparent aerogel specialized overcoat composition of any of claims 1-7, wherein the method of preparation is: and mixing nano-silver-doped nano tin antimony oxide, acrylic emulsion, a film forming aid, a thickening agent, an antifreezing aid, a bactericide, a pH value regulator, water and a transparent aid to obtain the special finishing coating composition for the transparent aerogel.
9. Use of a transparent aerogel specialized overcoat composition according to any of claims 1-7 in a light reflecting overcoat.
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| CN104356810A (en) * | 2014-11-21 | 2015-02-18 | 苏州大乘环保建材有限公司 | Reflective thermal insulation real stone paint |
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| CN106590128A (en) * | 2016-12-09 | 2017-04-26 | 苏州蓝锐纳米科技有限公司 | Novel nano ATO transparent heat isolation and energy saving glass coating |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100062032A1 (en) * | 2008-09-09 | 2010-03-11 | Guardian Industries Corp. | Doped Titanium Dioxide Coatings and Methods of Forming Doped Titanium Dioxide Coatings |
| US20130168595A1 (en) * | 2011-12-29 | 2013-07-04 | Keith Chang | Nanometer thermal insulation coating and method of manufacturing the same |
| CN104356810A (en) * | 2014-11-21 | 2015-02-18 | 苏州大乘环保建材有限公司 | Reflective thermal insulation real stone paint |
| CN106118287A (en) * | 2016-06-27 | 2016-11-16 | 江西省科学院应用化学研究所 | A kind of nano ATO/CuS filler water soluble acrylic acid transparent heat insulating dope |
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