CN114517038B - Sand wall-shaped building coating - Google Patents
Sand wall-shaped building coating Download PDFInfo
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- CN114517038B CN114517038B CN202210298300.7A CN202210298300A CN114517038B CN 114517038 B CN114517038 B CN 114517038B CN 202210298300 A CN202210298300 A CN 202210298300A CN 114517038 B CN114517038 B CN 114517038B
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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
- C09D5/28—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for wrinkle, crackle, orange-peel, or similar decorative effects
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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
- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The application relates to the field of exterior wall coatings, and particularly discloses a sand-wall-shaped building coating. The sand wall-shaped building coating comprises raw materials such as water-based acrylic emulsion, titanium dioxide, filler, structural color pigment, quartz sand, auxiliary agent, water and the like; the structural color pigment is prepared by sequentially coating the surface of a substrate with a layer structure, wherein the layer structure comprises an A layer with the refractive index larger than 1.8 and a B layer with the refractive index smaller than or equal to 1.8, the A layer and the B layer are sequentially and continuously arranged, the A layer is at least one layer, and the thickness of the A layer is smaller than that of the B layer; the base material is selected from one of inorganic glass, stainless steel flakes and organic glass, and the particle size of the base material is 2-5 microns. The sand-wall building coating has high color retention and weather resistance, and delta E is less than or equal to 0.38.
Description
Technical Field
The application relates to the field of exterior wall coatings, and more particularly relates to a sand-wall-shaped building coating.
Background
The coating is coated on the surface of an object to be protected or decorated and can form a continuous coating which is firmly attached to the object to be decorated and protected.
The sand wall shaped building paint is mainly used for building outer wall, and is prepared by using emulsion as base material, and adding aggregate, functional material and organic pigment or inorganic pigment. The sand wall-shaped building coating has the advantages of rich texture, strong stereoscopic impression, various colors and the like.
However, the sand wall building coating has problems of poor weather resistance and color retention, dull color, low saturation, etc. due to the influence of temperature, ultraviolet irradiation and moisture during the use.
Disclosure of Invention
In order to obtain higher color retention and weather resistance of the sand-wall building coating, the application provides the sand-wall building coating.
According to the first aspect, the application provides a sand-wall-shaped building coating which comprises, by weight, 10-25 parts of a water-based acrylic emulsion, 2-8 parts of titanium dioxide, 8-25 parts of a filler, 0.1-5 parts of a structural color pigment, 50-70 parts of quartz sand, 1-5 parts of an auxiliary agent and 5-15 parts of water, wherein the structural color pigment is prepared by sequentially and externally coating the surface of a base material with a layer structure, the layer structure comprises an A layer with a refractive index larger than 1.8 and a B layer with a refractive index smaller than or equal to 1.8, the A layer and the B layer are sequentially and continuously arranged, the A layer is at least one layer, and the thickness of the A layer is smaller than that of the B layer;
the base material is selected from one of inorganic glass, stainless steel flakes and organic glass, and the particle size of the base material is 2-5 microns.
In the application, the sand wall-shaped building coating is prepared by taking water-based acrylic emulsion as a base material and adding quartz sand (the particle size is 80-120 meshes), structural color pigment and other functional materials. The structural color pigment is formed by coating a layer structure with different refractive indexes on the surface of a substrate, and when sunlight irradiates on the substrate, refraction and interference occur, so that the weather resistance and the color retention of the sand-wall-shaped building coating prepared from the structural color pigment are improved.
In the present application, the substrate may be selected from synthetic glass, stainless steel flakes or inorganic glass. The refractive indexes of the organic glass, the stainless steel flake and the inorganic glass are all within the range of 1.4-1.6. A layer A with the refractive index larger than 1.8 is coated on the organic glass, the stainless steel scale or the inorganic glass, a layer B with the refractive index smaller than 1.8 is further coated, and multiple layers are sequentially and circularly coated, so that single-layer or multi-layer film interference occurs on the organic glass, the stainless steel scale or the inorganic glass, and the organic glass, the stainless steel scale or the inorganic glass is brighter in color and higher in saturation. The material of the stainless steel scale is mainly 304 and 316 stainless steel.
Preferably, the water-based acrylic emulsion accounts for 20-25 parts, and the structural color pigment accounts for 2.5-5 parts.
In the application, the structural color pigment is added into the paint instead of an organic pigment or an inorganic pigment and then is matched with the water-based acrylic emulsion, so that the color retention and the weather resistance of the sand-wall-shaped building paint can be improved, and the delta E is less than 0.38.
In a specific embodiment, the aqueous acrylic emulsion is 20 parts, and the structural color pigment is 2.5 parts. The color retention and weather resistance of the sand wall-shaped building coating are high, and the delta E is 0.11-0.38.
Preferably, the number of the layers A is 2, and the number of the layers B is 2.
In the present application, the number of layers of the layer a is at least one, i.e. the structural pigment comprises only the substrate and the layer a, or the structural pigment comprises the substrate, the layer a and the layer B. The number of layers A may also be 2, i.e. the structural pigment comprises the substrate, the layers A, the layers B and the layers A or comprises the substrate, the layers A, the layers B, the layers A and the layers B. When the number of the A layers in the structural color pigment is 2, the structural color pigment is matched with the water-based acrylic emulsion, and the color retention and the weather resistance of the sand-wall-shaped building coating are high.
Similarly, the number of layers a may be 3, 4 or more. Generally, the larger the number of layers of the a layer and the B layer, the stronger the interference, and the higher the saturation and brightness of the reflected structural color. However, as the number of layers increases, the reflectance gradually decreases as the number of layers increases to a certain value, and the effect of the sand-wall architectural coating is directly affected.
Preferably, the thickness of the A layer is 50-80nm, and the thickness of the B layer is 100-300nm.
In the application, the interference effect is controlled by adjusting the thicknesses of the layer A and the layer B, and the thickness of the layer B is larger than that of the layer A, so that the color retention and the weather resistance of the sand-wall-shaped building coating are improved.
When only the layer A is coated on the substrate, the substrate or the coating does not generate flowing color; when the base material is coated with more than 2 layers and the thickness of the layer B is larger than that of the layer A, bright flowing color is generated, so that the coating has bright color. Moreover, the number and thickness of the layer A and the layer B are reasonably controlled, and the layer A and the layer B are matched with the water-based acrylic emulsion to better absorb ultraviolet rays and reduce the erosion of water, so that the sand-wall-shaped building coating has better color retention and weather resistance.
In a specific embodiment, the a layer is 65nm thick; the thickness of the B layer is 230nm.
In a specific embodiment, the A layer is TiO 2 Layer B, the layer B is SiO 2 And (3) a layer. In the present application, the preparation of TiO using n-butyl titanate 2 Layer (A layer), tiO 2 Folding of layersThe refractive index is 2.7; using silica Sol (SiO) 2 Mass fraction of (5%) preparing SiO 2 Layer (B layer), siO 2 The refractive index of the layer was 1.45.
Preferably, the filler is talcum powder and heavy calcium carbonate, and the weight ratio of the talcum powder to the heavy calcium carbonate is 1 (5-5.5).
In this application, talc and ground calcium carbonate are mixed with each other and added as a filler to a sand wall-like architectural coating. The talcum powder has higher lubricity, fire resistance and the like; the heavy calcium carbonate is a powdery inorganic filler and has the characteristics of high chemical purity, large inertia, difficult chemical reaction and good thermal stability; no decomposition at 400 deg.C, low refractive index, low hardness, low abrasion value, and high dispersibility. When the talcum powder and the heavy calcium carbonate are added into the sand-wall-shaped building coating according to the weight ratio of 1 (5-5.5), the sand-wall-shaped building coating not only has strong covering capability, but also can improve the dispersibility of the structural color pigment, and further improve the weather resistance and color retention of the sand-wall-shaped building coating.
Preferably, the auxiliary agent comprises the following components, by weight, 0.15-0.25 part of an anti-settling agent, 0.5-0.65 part of a dispersing agent, 0.25-0.4 part of a wetting agent, 0.3-0.4 part of an antifreezing agent, 1.5-2 parts of a film-forming auxiliary agent, 0.15-0.25 part of a preservative, 0.15-0.25 part of an antifoaming agent, and 0.15-0.25 part of a thickening agent.
In the application, the auxiliary agent is an auxiliary and functional raw material, and can further improve the performance of the sand wall-shaped building coating. For example, the defoaming agent can reduce stress and improve the adhesive force of the sand wall-shaped building coating on a protected object; the pH regulator can regulate the pH value of the sand wall-shaped building coating to make the pH value of the sand wall-shaped building coating be 8-10; the dispersing agent, the wetting agent and the film-forming assistant can influence the dispersion uniformity of the structural color pigment, namely, the structural color pigment is dispersed in the water-based acrylic emulsion more uniformly, so that the structural color pigment and the water-based acrylic emulsion are combined more tightly, and finally the sand-wall-shaped building coating has higher weather resistance.
The anti-settling agent is magnesium aluminum silicate, the dispersant is SN-5040 of Santonopoda Japan, the wetting agent is Emulsogen LCN407, the antifreezing agent is propylene glycol, the film forming auxiliary agent is alcohol ester-12, and the thickening agent is a mixture of hydroxyethyl cellulose and an acrylic acid alkali swelling thickening agent; the preservative is isothiazolinone preservative; the defoaming agent is mineral oil defoaming agent with the model number of FoamStar 2410 AC.
In a second aspect, the present application provides a method for preparing a sand-walled architectural coating, comprising the steps of,
(1) Preparation of structured color pigments
S1: adding a base material into a mixed solution of water and ethanol, wherein the weight ratio of the water to the ethanol is 2; then adding the raw materials for preparing the layer A, stirring and filtering to obtain a base material mixture, and calcining the base material mixture at 600 ℃ for 3-3.5 hours to obtain a base material with a coating layer A;
s2: adding the base material with the coating A layer into the raw material for preparing the layer B, stirring for 15-20min, standing, filtering to obtain a semi-finished product of the structural color pigment coated with the layer B, and calcining the semi-finished product at 600 ℃ for 3-3.5h to obtain the structural color pigment.
By repeating the steps S1 and S2, the number of layers of the layer A and the layer B can be increased. The thickness of the layer A can be adjusted by controlling the stirring time in the step S1, and the thickness of the layer A gradually increases along with the increase of the stirring time, and the layer A is obtained by an empirical formula d SiO2 Simple calculation was performed for = 2.0-2.3, where d is the thickness (nm) and t is the stirring time (min). The thickness of the B layer can be controlled by adjusting the standing time in the step S2, and the thickness of the B layer gradually increases along with the extension of the standing time, and the thickness of the B layer is controlled by an empirical formula d SiO2 For simple calculations, = 0.95-1.2 t, where d is the thickness (nm) and t is the resting time (min).
(2) Preparation of the coating
Adding water and an anti-settling agent into a container, sequentially adding talcum powder, heavy calcium carbonate, titanium dioxide, a dispersing agent, a wetting agent and an antifreezing agent according to a proportion under the condition of a rotating speed of 400-500rpm, then increasing the rotating speed to 1400-1600rpm, and carrying out dispersion stirring for 30-35min; reducing the rotating speed to 700-800rpm, sequentially adding the water-based acrylic emulsion, the film forming additive, the preservative, the quartz sand, the structural color pigment, the defoaming agent and the thickening agent according to the proportion, and dispersing for 15-20min to obtain the sand wall-shaped building coating.
In summary, the present application has the following beneficial effects:
1. the structural color pigment and the water-based acrylic emulsion are matched with each other, so that the sand-wall-shaped building coating has high color retention and weather resistance, and delta E is less than or equal to 0.38;
2. according to the coating, the substrate is coated with the layer A and the layer B with different thicknesses and different refractive indexes, so that the substrate generates structural color, and the weather resistance and the color retention of the coating are improved; preferably, the number of the A layers is 2, wherein the thickness of the A layer is 65nm, the number of the B layers is 2, the thickness of the B layer is 230nm, the weather resistance and color retention of the coating are high, and delta E is 0.11;
3. the preparation method of the structural color pigment is simple to operate, easy to realize batch production and low in cost.
Detailed Description
The present application will be described in further detail with reference to examples.
Raw materials
The raw materials used in the application can be obtained commercially and have no special requirements.
Preparation example
Firstly, weighing 1kg of stainless steel flakes (304 stainless steel), wherein the particle size of the stainless steel flakes is 2 microns, adding the stainless steel flakes into a mixed solution of water and ethanol, wherein the mass ratio of water to ethanol is 2;
then adding the stainless steel scale with the coated titanium dioxide layer into silica Sol (SiO) 2 The mass fraction of the silica sol is 5%), wherein the silica sol is 500g, the mixture is stirred for 15min and then is kept stand for 3.6h, and then is filtered to obtain a semi-finished product of the structural color pigment coated with a silicon dioxide layer (layer B), and the thickness of the silicon dioxide layer is 230nm; calcining the semi-finished product at 600 ℃ for 3h to obtain the structureColor pigments, the thickness of the layer structure was measured using a step-up meter (model XP-1). The preparations of preparation examples 1 to 9 were carried out by the above-mentioned preparation methods, as shown in Table 1.
TABLE 1 preparation of preparations 1 to 9 (unit: nm)
* In Table 1, "-" indicates no, as in preparation example 3, second B layer.
Examples
Example 1
Adding 100g of water into a dispersion cylinder, regulating the rotation speed to 400rpm, sequentially adding 2g of anti-settling agent, 20g of talcum powder, 110g of heavy calcium carbonate, 35g of titanium dioxide, 5g of dispersing agent, 3g of wetting agent and 3g of antifreezing agent according to the proportion, then regulating the rotation speed of a dispersion machine to 1500rpm, and carrying out dispersion stirring for 30 minutes;
reducing the rotating speed to 800rpm, sequentially adding 200g of water-based acrylic emulsion, 16g of film-forming additive, 2g of preservative, 520g of quartz sand with the particle size of 80-120 meshes, 25g of structural color pigment (prepared by a preparation example), 2g of defoaming agent and 2g of thickening agent according to a proportion, dispersing for 15 minutes until the mixture is uniformly dispersed without agglomerated particles, and obtaining the sand-wall-shaped building coating.
The amounts of the aqueous acrylic emulsion and the structural color pigment added in examples 2 to 13, comparative examples 1 to 2, and example 1 are shown in Table 2:
TABLE 2 amounts of raw materials used in examples 2-13 and comparative examples 1-2
* In Table 2, "-" indicates that the amount added was 0g.
Comparative example 3
Comparative example 3 differs from example 4 in that phthalocyanine blue is used instead of the structural color pigment of example 4, the rest remaining the same.
Comparative example 4
Comparative example 4 differs from example 4 in that the structural color pigment of example 4 is replaced with an iron red pigment and the rest remains the same.
Performance test
The sand wall-shaped architectural coatings prepared in examples 1 to 13 and comparative examples 1 to 4 were painted on a sample plate, after drying, the sample plate was placed under a xenon lamp for artificial aging, and the irradiation intensity at a wavelength of 340nm was controlled to be 0.51W/m 2 And irradiating for 2000h, directly testing by using an instrument, and comparing the colors of the sample plate before and after irradiation to obtain delta E.
The sand wall-shaped building coating prepared by the method is mainly applied to the inside and outside of a building wall, and the weather resistance refers to the capability of the building coating for resisting comprehensive damage caused by illumination, cold and heat, wind and rain, bacteria and the like. The general experiment for detecting the weather resistance of the architectural coating is an artificial aging experiment, and the specific detection result is shown in table 3.
TABLE 3 test results
As can be seen by combining examples 1-13 with comparative examples 1-4 and by combining Table 3, the sand wall-like architectural coatings prepared from examples 1-13 have high color retention and weatherability, and delta E is 0.38 or less. Especially the sand wall architectural coating prepared from example 4, delta E is 0.11.
It can be seen from the combination of examples 1-9 and Table 3 that the number and thickness of the A and B layers can affect the color retention and weather resistance of the sand wall building coating, and the delta E gradually decreases with the increase of the number of the A and B layers, which indicates that the color retention of the sand wall building coating is gradually improved. With the thickness of the layer A and the layer B increasing gradually, the delta E is reduced firstly and then increased, which shows that the color retention of the sand wall-shaped architectural coating is reduced firstly and then improved.
Combining example 4 with examples 10-13 and table 3, it can be seen that as the aqueous acrylic emulsion increases, the delta E decreases and then increases, indicating that the color retention of the sand-walled architectural coating decreases and then increases. With increasing structural color pigments, delta E similarly decreased and then increased, indicating that color retention of the sand-walled architectural coating decreased and then increased.
When the water-based acrylic emulsion or the structural color pigment is not added into the sand-wall architectural coating, the delta E is larger, which indicates that the color retention of the sand-wall architectural coating is poor, and the sand-wall architectural coating gradually fades after artificial aging for 1000h, as can be seen by combining the example 4 and the comparative examples 1-2 with the table 3.
When the phthalocyanine blue or the iron red pigment is added to the sand wall building coating, the delta E is larger, which indicates that the color retention of the sand wall building coating is poor, as can be seen by combining example 4 and comparative examples 1-2 with Table 3.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (7)
1. A sand wall-shaped building coating is characterized by comprising the following raw materials, by weight, 10-25 parts of water-based acrylic emulsion, 2-8 parts of titanium dioxide, 8-25 parts of filler, 0.1-5 parts of structural color pigment, 50-70 parts of quartz sand, 1-5 parts of auxiliary agent and 5-15 parts of water,
the structural color pigment is prepared by sequentially and externally coating the surface of a substrate with a layer structure, wherein the layer structure comprises an A layer with the refractive index of more than 1.8 and a B layer with the refractive index of less than or equal to 1.8, the A layer and the B layer are sequentially and continuously arranged, the A layer is at least one layer, the thickness of the A layer is 50-80nm, and the thickness of the B layer is 100-300nm; the base material is selected from one of inorganic glass, stainless steel flakes and organic glass, and the particle size of the base material is 2-5 microns.
2. The sand wall-like architectural coating according to claim 1, wherein: 20-25 parts of water-based acrylic emulsion and 2.5-5 parts of structural color pigment.
3. The sand wall-like architectural coating according to claim 2, wherein: 20 parts of water-based acrylic emulsion and 2.5 parts of structural color pigment.
4. The sand wall-like architectural coating according to claim 1, wherein: the number of layers of the A layer is 2, and the number of layers of the B layer is 2.
5. The sand walled architectural coating of claim 1, wherein: the thickness of the A layer is 65nm, and the thickness of the B layer is 230nm.
6. The sand wall-like architectural coating according to claim 1, wherein: the layer A is TiO 2 Layer B, the layer B is SiO 2 Layer(s) in that respect.
7. The sand wall-like architectural coating according to claim 1, wherein: the auxiliary agent comprises the following raw materials, by weight, 0.15-0.25 part of an anti-settling agent, 0.5-0.65 part of a dispersing agent, 0.25-0.4 part of a wetting agent, 0.3-0.4 part of an antifreezing agent, 1.5-2 parts of a film-forming auxiliary agent, 0.15-0.25 part of a preservative, 0.15-0.25 part of an antifoaming agent, and 0.15-0.25 part of a thickening agent.
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| CN104946033A (en) * | 2015-07-24 | 2015-09-30 | 武汉德美涂料股份有限公司 | Sand texture paint and production method thereof |
| CN106978081A (en) * | 2017-03-29 | 2017-07-25 | 湖北武大珞珈工程结构检测咨询有限公司 | A kind of sintered quartz sand sand textured coating |
| CN108793824A (en) * | 2017-04-26 | 2018-11-13 | 沪宝新材料科技（上海）股份有限公司 | A kind of functional sand textured coating and preparation method thereof |
| JP2018203814A (en) * | 2017-05-30 | 2018-12-27 | キヤノン株式会社 | Structural color material, coating, and manufacturing method therefor |
| CN110079171B (en) * | 2019-04-30 | 2020-07-14 | 大连理工大学 | Structural color coating based on high-refractive-index microsphere Mie scattering |
| CN110776758B (en) * | 2019-09-29 | 2022-04-19 | 惠州市华阳光学技术有限公司 | Pigment flake and coating |
| CN112300622A (en) * | 2020-10-28 | 2021-02-02 | 深圳市绚图新材科技有限公司 | Structural color pigment flake with good comprehensive performance special for automobile and preparation method thereof |
| CN113105769B (en) * | 2021-04-09 | 2022-07-22 | 哈尔滨工业大学（深圳） | Coatable structural color slurry and preparation method thereof |
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