CN110938322A - Inorganic coating and preparation method thereof - Google Patents
Inorganic coating and preparation method thereof Download PDFInfo
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- CN110938322A CN110938322A CN201911239625.2A CN201911239625A CN110938322A CN 110938322 A CN110938322 A CN 110938322A CN 201911239625 A CN201911239625 A CN 201911239625A CN 110938322 A CN110938322 A CN 110938322A
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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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
- C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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Abstract
The invention provides an inorganic coating and a preparation method thereof, and solves the problems that the existing inorganic coating is poor in stability and influences the storage and use of products. The inorganic coating adopts inorganic emulsion, which is completely different from the commercial compound inorganic coating. Inorganic components and organic components in the inorganic coating on the market exist independently, the inorganic components are easy to react with polyvalent metal ions in water or other materials to form insoluble substances, a stabilizer needs to be added, the inorganic components in the inorganic coating are coated in the organic components in a core-shell mode, so that the inorganic and organic components are more uniformly distributed and have more excellent film forming property, the possibility of generating insoluble silicate is avoided, the stabilizer does not need to be added, the product stability is higher, the freeze-thaw stability is excellent, the washing resistance is high, the paint preparation applicability is stronger, and the inorganic component and the organic component can be directly added when the inorganic coating is used.
Description
Technical Field
The invention relates to the field of materials, in particular to an inorganic coating and a preparation method thereof.
Background
The inorganic coating is a material which takes inorganic material alkali metal silicate as a main film forming substance or a binder, the content of organic matters in the components is less than 5 percent, and the inorganic coating is a short name of all-inorganic mineral coating, and the raw materials come from natural environment-friendly silica resources. Because of high performance, the paint can be made into A-grade fire-retardant coating, full-odor environment-friendly nontoxic coating, fair-faced concrete basement mildew-proof coating, photocatalytic coating, reflective heat-insulating coating (good infrared reflectivity is kept for a long time), chemical acid rain-proof coating, alkali-resistant strengthening primer for emulsion paint, substrate strengthening interface agent and the like, is widely used in common buildings and acid rain environments, underground garages, hospitals, schools, bridges, subway tunnels and basements, has the functions which cannot be achieved by common emulsion paint with A-grade fire resistance, mildew resistance, air permeability, durability, alkali resistance, high hardness, antistatic self-cleaning, chemical acid rain resistance, excellent adhesive force and the like, is a product which meets the requirements of environment protection and high-quality functionality, and has a plurality of advantages.
However, the existing inorganic paint in the market is usually formed by physically and mechanically blending potassium silicate and emulsion, wherein the potassium silicate directly contacts water, pigments and fillers and the like in the paint and can be contacted with polyvalent metal ions (Ca) contained in the water and the pigments and fillers2+、Mg2+、Fe3+、Al3+Etc.) to generate insoluble silicate, which has great influence on the stability of the product, has strong restriction on powder collocation and metal ions of the powder, and is not beneficial to storage and use; the principle is as follows:
in addition, because the systems are different and the product formula of each manufacturer is different, the current inorganic coating cannot show the value of the product in diversified internal and external wall coatings.
Therefore, it is necessary to develop an inorganic coating with high stability to embody the value of such a coating.
Disclosure of Invention
The invention aims to solve the defects that the existing inorganic coating has poor stability and influences the storage and use of products, and provides an inorganic coating and a preparation method thereof.
The conception of the invention is as follows:
the existing product adopts a mechanical blending mode to compound the inorganic alkali metal silicate and the emulsion together, the inorganic alkali metal silicate and the emulsion are in an independent state, and when the inorganic alkali metal silicate is contacted with water, pigments, fillers and the like, the inorganic alkali metal silicate is easy to react with polyvalent metal ions to generate insoluble silicate, so that the storage and the use of the inorganic coating are influenced. Based on this, the invention starts with how to avoid the contact of the inorganic alkali metal silicate and the polyvalent metal ions, and adopts the inorganic emulsion formed by wrapping the inorganic alkali metal silicate in the high molecular polymer to avoid the contact of the inorganic alkali metal silicate and the polyvalent metal ions, thereby improving the stability of the product.
Thus, the existing inorganic coating is fundamentally different from the inorganic coating of the present invention, see table 1 and fig. 1 to 3:
TABLE 1
| Item | Inorganic component | Organic component |
| Existing products | Inorganic alkali metal silicates | High molecular emulsion |
| The product | Emulsion core fraction | Emulsion shell part |
In order to achieve the purpose, the technical solution provided by the invention is as follows:
the inorganic coating is characterized by comprising the following components in percentage by weight:
preferably, the inorganic emulsion comprises an emulsion core composed of inorganic alkali metal silicate and an emulsion shell composed of organic emulsion and wrapped outside the emulsion core; the emulsion core and the emulsion shell are combined through a chemical bond.
Preferably, the organic emulsion is an acrylic emulsion, and the structure of the acrylic emulsion is an acrylate molecular chain; the inorganic alkali metal silicate is potassium silicate; the chemical reaction formula of the acrylic emulsion and potassium silicate to form the inorganic emulsion is as follows:
preferably, the following components are also included:
composition parts by weight (1000 parts in total)
SiO2Aerogel slurry 30-150.
Preferably, the formulation is as follows:
further, the titanium dioxide is rutile type titanium dioxide; the rutile titanium dioxide is environment-friendly and nontoxic, and has high hardness, good covering power and excellent artificial aging performance when being applied to products due to high melting point and boiling point and stable chemical properties.
The invention also provides a preparation method of the inorganic coating, which is characterized by comprising the following steps:
1) mixing deionized water, a wetting agent, a dispersing agent, a multifunctional auxiliary agent, cellulose and a defoaming agent, stirring for 15-20 minutes at the rotating speed of 800-1000 revolutions per minute, and dispersing to be uniform paste to obtain a paste mixture;
2) adding titanium dioxide and filler into the paste mixture obtained in the step 1), stirring at the rotating speed of 1500-;
3) adding the inorganic emulsion into the mixture obtained in the step 2), and stirring at the rotating speed of 1000-1500 rpm until the mixture is uniform to prepare the inorganic coating.
Further, the inorganic emulsion comprises an emulsion core composed of inorganic alkali metal silicate and an emulsion shell composed of organic emulsion and wrapped outside the emulsion core; the emulsion core and the emulsion shell are combined through a chemical bond.
Further, the heat preservation and insulation function is better achieved, more diversified functions are given to the inorganic coating, and in the step 3), the inorganic emulsion is added and the SiO is also added2Aerogel slurry.
Further, in the step 1), the titanium dioxide is rutile type titanium dioxide.
The invention has the advantages that:
1. the inorganic coating of the invention adopts inorganic emulsion, which is completely different from the commercial compound inorganic coating. Inorganic components and organic components in the inorganic coating on the market exist independently, the inorganic components are easy to react with polyvalent metal ions in water or other materials to form insoluble substances, a stabilizer needs to be added, the inorganic components in the inorganic coating are coated in the organic components in a core-shell mode, so that the inorganic and organic components are more uniformly distributed and have more excellent film forming property, the possibility of generating insoluble silicate is avoided, the stabilizer does not need to be added, the product stability is higher, the freeze-thaw stability is excellent, the washing resistance is high, the paint preparation applicability is stronger, and the inorganic component and the organic component can be directly added when the inorganic coating is used.
2. The inorganic emulsion used in the inorganic coating has the emulsion core inorganic alkali metal silicate and the emulsion shell organic emulsion combined through chemical bonds, so that a higher anchoring effect is achieved, and inorganic and organic components interact with each other, so that better stability is achieved.
3. The common inorganic coating needs to be screened for proper pigments and fillers, but the inorganic coating prepared by using the inorganic emulsion of the invention can not react with metal ions in powder, does not need to be screened for pigments and fillers, can not generate flocculation and caking phenomena after long-term storage, and has stronger applicability to raw materials.
4. The inorganic coating of the invention introduces SiO2The aerogel can better play the thermal insulation function, gives inorganic coating more diversified functions, and further promotes the product functionality.
5. The preparation method of the inorganic coating is convenient and fast, and is easy for industrial production.
Drawings
FIG. 1 is a structural configuration diagram of a conventional inorganic coating;
FIG. 2 is a structural configuration diagram of the inorganic coating according to the present invention;
FIG. 3 is a structural view of an inorganic emulsion in the inorganic coating material according to the present invention;
FIG. 4 is a comparative plot of a fire and flame resistance test;
FIG. 5 is a comparative graph of paint film physical property testing;
the reference numbers are as follows: 1-inorganic alkali metal silicate; 2-high molecular emulsion; 3-inorganic emulsion.
Detailed Description
The present invention will be described in further detail with reference to the following specific examples:
first, the formulation of the existing inorganic coating is compared with the inorganic coating of the present invention, see table 2 specifically:
TABLE 2
From the formulation of the inorganic coating and the inorganic coating, the amount of the raw materials adopted by the invention is obviously less than that of the raw materials in the existing product, and the SiO for improving the product function is introduced into the inorganic coating for the first time2Aerogel slurry:
SiO2the aerogel is a nano porous material with high specific surface area, high porosity, low density and extremely low thermal conductivity, and the heat preservation and insulation principle is as follows:
1) convection: the main components of air molecules are nitrogen and oxygen, the mean free path is about 70nm, and SiO2The size of the pore in the aerogel is far smaller than the critical size (the size of the aerogel is about 5-50 nm), air molecules in the material lose the free flow capacity, and are relatively attached to the pore wall to inhibit air convection, so that the gaseous thermal conductivity is low, and the material is in a state similar to vacuum. Nanoporous SiO2Aerogel normal temperature and pressureThe lower thermal conductivity coefficient is less than 0.013 w/m.k, is far lower than the thermal conductivity coefficient of static air at normal temperature by 0.025 w/m.k, is a solid material with the lowest thermal conductivity at present, and can be called a super thermal insulation material;
2) radiation: the thermal radiation of the aerogel belongs to infrared thermal radiation in a 3-5 mu m area, and has a good shielding effect on infrared light, and simultaneously, due to the nanoscale porous network structure and the extremely low volume density of the aerogel, the internal porous walls of the material tend to be infinite for several days, and each porous wall can be regarded as a reflecting surface and a refracting surface of radiation, so that the thermal radiation has the effect of infinite heat shielding plates, the shielding efficiency is high, and the radiation heat transfer is reduced to be nearly the lowest limit.
3) Heat conduction: the aerogel has extremely high porosity, the volume ratio of the solid is very low, nearly infinite nano pores are formed, the heat flow is limited to be only transmitted along the pore walls of the sparse framework when being transmitted in the solid, and nearly infinite pore walls form a nearly infinite path effect, so that the heat conduction capacity of the solid is reduced to be close to the lowest limit which is only about 1/500 of the heat conduction rate of the non-porous inorganic glass-state material.
Thus, SiO2The special structure of the aerogel makes the aerogel become a solid material with lowest heat conductivity and best heat insulation performance in the world at present, can well inhibit the three ways of heat conduction, and SiO is added2The aerogel inorganic coating has good application value.
Meanwhile, the key point of the invention is the inorganic emulsion in the formula, the inorganic emulsion comprises an emulsion core formed by inorganic alkali metal silicate and an emulsion shell formed by organic emulsion and wrapped outside the emulsion core; in order to achieve a higher anchoring effect, the inorganic components and the organic components are interacted to achieve better stability, and the inorganic alkali gold silicate is combined with the organic emulsion through chemical bonds, so that the stability and the practicability of the product are improved. The inorganic alkali metal silicate is inorganic alkali metal potassium silicate, the organic emulsion is acrylic emulsion, and the structure of the acrylic emulsion is acrylate molecular chain.
The inorganic coating of the invention can be prepared by adopting the existing water-based architectural coating production equipment, and the specific preparation method comprises the following steps:
1) mixing deionized water, a wetting agent, a dispersing agent, a multifunctional auxiliary agent, cellulose and a defoaming agent, stirring for 15-20 minutes at the rotating speed of 800-1000 revolutions per minute, and dispersing to be uniform paste to obtain a paste mixture;
2) adding titanium dioxide and filler into the paste mixture obtained in the step 1), stirring at the rotating speed of 1500-; wherein, the titanium dioxide can adopt rutile type titanium dioxide;
3) adding the inorganic emulsion into the mixture obtained in the step 2), and stirring at the rotating speed of 1000-1500 rpm until the mixture is uniform, thereby finally obtaining the inorganic coating.
Meanwhile, in order to test the excellent performance of the product, the invention also compares the performance of the product and the following comparison with the prior common latex paint:
1. fire and flame resistance, detailed in table 3 and fig. 4:
TABLE 3
| Detecting items | Products of the invention | Common latex paint |
| Total organic content | 6.3％ | 6.4％ |
| Flame resistance/rating | 4 is divided into | 1 minute, more smoke |
As can be seen from Table 3 and FIG. 4, under the same test conditions, the flame resistance of the conventional latex paint is poor and the amount of smoke is high; the product of the invention has better performance than common latex paint.
2. The physical properties of the paint film are detailed in table 4 and fig. 5:
TABLE 4
As can be seen from Table 4 and FIG. 5, under the same test conditions, the physical properties of the paint film of the product of the present invention are better than those of common latex paints (I am the product of the present invention in the figure, and the common latex paints are common latex paints).
3. Stability of
The product stability comparison experiment is carried out by adopting a spotoma viscometer and the existing market products, and the result comparison is detailed in Table 5
TABLE 5
It can be seen from the comparative experimental data in table 5 that the conventional blending inorganic coating has an obvious short plate in storage stability, and is unstable in storage due to precipitation caused by reaction with high-valence metal ions in the powder.
4. In order to further verify the overall performance of the product, the product of the invention is subjected to comprehensive evaluation and detection, and the details are shown in table 6:
TABLE 6
From the detection indexes in table 6, it can be seen that the product of the present invention has excellent performance and good market prospect.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present disclosure.
Claims (10)
1. The inorganic coating is characterized by comprising the following components in percentage by weight:
2. the inorganic coating material according to claim 1, characterized in that:
the inorganic emulsion comprises an emulsion core formed by inorganic alkali metal silicate and an emulsion shell formed by organic emulsion and wrapped outside the emulsion core; the emulsion core and the emulsion shell are combined through a chemical bond.
3. The inorganic coating material according to claim 2, characterized in that: the organic emulsion is acrylic emulsion; the inorganic alkali metal silicate is potassium silicate.
4. The inorganic paint according to any one of claims 1 to 3, characterized by further comprising the following components:
composition parts by weight (1000 parts in total)
SiO2Aerogel slurry 30-150.
5. The inorganic coating material according to claim 4, wherein the formulation is as follows:
6. the inorganic coating material according to claim 5, characterized in that: the titanium dioxide is rutile type titanium dioxide.
7. A method for preparing the inorganic paint according to claim 1, which comprises the following steps:
1) mixing deionized water, a wetting agent, a dispersing agent, a multifunctional auxiliary agent, cellulose and a defoaming agent, stirring for 15-20 minutes at the rotating speed of 800-1000 revolutions per minute, and dispersing to be uniform paste to obtain a paste mixture;
2) adding titanium dioxide and filler into the paste mixture obtained in the step 1), stirring at the rotating speed of 1500-;
3) adding the inorganic emulsion into the mixture obtained in the step 2), and stirring at the rotating speed of 1000-1500 rpm until the mixture is uniform to prepare the inorganic coating.
8. The method for producing an inorganic paint according to claim 7, characterized in that:
the inorganic emulsion comprises an emulsion core formed by inorganic alkali metal silicate and an emulsion shell formed by organic emulsion and wrapped outside the emulsion core; the emulsion core and the emulsion shell are combined through a chemical bond.
9. The method for producing an inorganic paint according to claim 8, characterized in that:
in step 3), SiO is added while the inorganic emulsion is added2Aerogel slurry.
10. The method for producing an inorganic paint according to claim 9, characterized in that:
in the step 1), the titanium dioxide is rutile type titanium dioxide.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480728A (en) * | 2020-12-01 | 2021-03-12 | 东莞大宝化工制品有限公司 | Preparation method of inorganic coating |
| CN113045915A (en) * | 2021-03-19 | 2021-06-29 | 三棵树(上海)新材料研究有限公司 | Fireproof aerogel heat-preservation and heat-insulation middle coating and preparation method thereof |
| CN114163852A (en) * | 2021-12-06 | 2022-03-11 | 雅士利涂料（苏州）有限公司 | Inorganic coating with bright color and no discoloration and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106752561A (en) * | 2016-11-14 | 2017-05-31 | 北京卫星制造厂 | A kind of aeroge compound heat-insulation coating and preparation method thereof |
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2019
- 2019-12-06 CN CN201911239625.2A patent/CN110938322A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106752561A (en) * | 2016-11-14 | 2017-05-31 | 北京卫星制造厂 | A kind of aeroge compound heat-insulation coating and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480728A (en) * | 2020-12-01 | 2021-03-12 | 东莞大宝化工制品有限公司 | Preparation method of inorganic coating |
| CN113045915A (en) * | 2021-03-19 | 2021-06-29 | 三棵树(上海)新材料研究有限公司 | Fireproof aerogel heat-preservation and heat-insulation middle coating and preparation method thereof |
| CN114163852A (en) * | 2021-12-06 | 2022-03-11 | 雅士利涂料（苏州）有限公司 | Inorganic coating with bright color and no discoloration and preparation method thereof |
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