Yellow inorganic dry powder coating and preparation method thereof

Abstract

The invention discloses a jade inorganic dry powder coating and a preparation method thereof, and relates to the technical field of coatings, the jade inorganic dry powder coating comprises the following components by weight: 30-50 parts of jade micro powder, 30-40 parts of white cement, 3-8 parts of modified diatomite, 5-10 parts of slaked lime, 20-25 parts of talcum powder, and 1-3 parts of cellulose; the jade micro powder is obtained by crushing and calcining Xiuyan jade and then ball-milling the Xiuyan jade until the particle size is 1200-2000 meshes; the modified diatomite is obtained by sequentially carrying out acid pickling and silane coupling agent treatment on diatomite. According to the jade inorganic dry powder coating, through the synergistic effect of all the components, the jade inorganic dry powder coating has the properties of being high in negative ion release amount, high in formaldehyde adsorption rate, fireproof, mildew-proof and the like, and preparation of the multifunctional jade inorganic dry powder coating is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to a jade-like inorganic dry powder coating and a preparation method thereof. Background Art

[0002] In the field of coating technology, as people's requirements for quality of life continue to improve, the demand for coating performance is becoming increasingly diversified. Although traditional coatings can meet basic decorative and protective functions, they often have deficiencies in environmental protection, health and functionality. In recent years, with the enhancement of people's environmental awareness and the pursuit of a healthy living environment, inorganic dry powder coatings have gradually been favored by the market due to their environmental protection, non-toxicity, strong weather resistance and other characteristics.

[0003] However, the functionality of existing inorganic dry powder coatings still needs to be improved. For example, although some inorganic dry powder coatings have good decorative effects, they perform poorly in terms of fire resistance, mildew resistance, negative ion release, formaldehyde adsorption and antibacterial properties. Negative ions are known as "air vitamins" and are beneficial to human health and can improve indoor air quality; formaldehyde is a common indoor air pollutant that poses a threat to human health.

[0004] It is particularly worth mentioning that Xiuyan jade is a jade variety with abundant reserves and relatively low cost, and has a certain ability to release negative ions, such as the negative ion release function and mechanism of Yingkou serpentine jade reported in the prior art, but its potential application value has not been fully explored and effectively utilized. Xiuyan jade not only has the aesthetic characteristics and trace element content shared by jade, but also its large storage capacity and low cost make its application in the field of coatings more economical and feasible. However, how to effectively integrate Xiuyan jade into inorganic dry powder coatings and make it have the characteristics of high negative ion release, high formaldehyde adsorption rate, fire resistance, mildew resistance, etc., while maintaining the stability and construction performance of the coatings, is a challenging and opportunity-filled problem facing the current field of coatings technology. R&D personnel are actively exploring innovative technical paths in order to transform the unique advantages of Xiuyan jade into the actual functions of coating products and meet the market demand for environmentally friendly, healthy, and multifunctional coatings. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a jade-like inorganic dry powder coating and a preparation method thereof.

[0006] In a first aspect, the present invention provides a jade-like inorganic dry powder coating, which comprises the following components in parts by weight:

[0007] 30-50 parts of jade powder, 30-40 parts of white cement, 3-8 parts of modified diatomaceous earth, 5-10 parts of slaked lime, 20-25 parts of talc, 1-3 parts of cellulose;

[0008] The jade micropowder is obtained by crushing Xiuyan jade, calcining it, and then ball-milling it to a particle size of 1200-2000 mesh.

[0009] The modified diatomaceous earth is obtained by sequentially treating diatomaceous earth with acid washing and a silane coupling agent.

[0010] Further, by weight, the jadeified inorganic dry powder coating comprises the following components:

[0011] 40 parts of jade micropowder, 35 parts of white cement, 5 parts of modified diatomaceous earth, 7.5 parts of slaked lime, 22.5 parts of talc powder, and 2 parts of cellulose.

[0012] Further, the working condition parameters of the calcination include: temperature of 600-700 °C and time of 1-2 hours.

[0013] Further, the white cement is 525-grade white cement.

[0014] Further, the preparation method of the modified diatomaceous earth comprises the following process:

[0015] Mix diatomaceous earth and a hydrochloric acid aqueous solution with a mass fraction of 4-6% at a weight ratio of 1:(10-15) and stir at room temperature for 30-45 minutes, then centrifuge, filter, and dry to obtain the first diatomaceous earth;

[0016] Impregnate the first diatomaceous earth and a silane coupling agent ethanol solution with a mass fraction of 3-5% at a weight ratio of 1:(10-15) at room temperature for 24 hours, then centrifuge, filter, and dry to obtain the modified diatomaceous earth.

[0017] Further, the silane coupling agent includes silane coupling agent KH-550.

[0018] Further, the particle size of the talc powder is 2000 mesh.

[0019] Second, based on the same inventive concept, the present invention provides a preparation method of the jadeified inorganic dry powder coating according to any one of the first aspect, as Figure 1 shown, the preparation method comprises the following steps:

[0020] Add white cement, modified diatomaceous earth, and talc powder to a double-screw mixer for first stirring and mixing to obtain a first mixture;

[0021] Add cellulose, jade micropowder, and slaked lime to the first mixture for second stirring and mixing to obtain the jadeified inorganic dry powder coating.

[0022] Furthermore, the operating condition parameters of the first heating and stirring include: temperature of 20°C to 30°C, time of 20 to 30 minutes, and rotation speed of 800 to 1000 rpm; the operating condition parameters of the second heating and stirring include: temperature of 50°C to 60°C, time of 20 to 30 minutes, and rotation speed of 500 to 800 rpm.

[0023] The above technical solutions provided by the embodiments of the present invention have at least the following advantages compared with the prior art:

[0024] The embodiments of the present invention provide a jadeized inorganic dry powder coating and a preparation method thereof. The present invention provides a jadeized inorganic dry powder coating, which through the synergistic effect of each component, has high negative ion release amount, high formaldehyde adsorption rate and other properties, realizing the preparation of a multi-functional jadeized inorganic dry powder coating. Specifically:

[0025] 1. Nano effect and active release of jade powder

[0026] After Xiuyan jade is ball-milled to a particle size of 1200 to 2000 mesh, the specific surface area surges, and a large number of silicon-oxygen bond (Si-O) active sites are exposed on the surface defects. The calcination process promotes the reorganization of the crystal structure, forming an amorphous SiO2 layer, enhancing the negative ion release ability. The principle is that through the interaction of surface hydroxyl groups (-OH) with water molecules in the air, H + and OH - are ionized, and the latter combines with O2 to form O 2- (negative ions); at the same time, the formed jadeized inorganic dry powder coating has the characteristics of smooth as jade, fireproof, mildew-proof, water-resistant, easy to construct, pollution-free, air purification, negative ion release, and durable.

[0027] 2. Hierarchical adsorption mechanism of modified diatomite

[0028] Pickling is used to remove carbonate impurities in diatomite, and a silane coupling agent (KH-550) is grafted to introduce organic groups, increasing the porosity and specific surface area, forming a multi-porous structure, and further forming a gradient adsorption channel with jade powder to extend the residence time of formaldehyde molecules and improve the formaldehyde adsorption rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments in line with the present invention, and are used together with the specification to explain the principles of the present invention.

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic flow chart of a preparation method of a petrified inorganic dry powder coating provided by an embodiment of the present invention. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Unless otherwise specifically stated, various raw materials, reagents, instruments and equipment used in the present invention can be obtained through market purchase or can be prepared by existing methods; at the same time, for the steps and parameters involved, without special limitations or specific descriptions, they can be carried out according to the steps and parameters of the petrified inorganic dry powder coating preparation process disclosed in the prior art or directly adopted according to the user manual of the existing equipment, and the present invention document will not elaborate one by one.

[0034] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. The experimental methods without specific conditions noted in the following embodiments are usually determined according to national standards. If there is no corresponding national standard, they are carried out according to general international standards, conventional conditions, or conditions recommended by the manufacturer.

[0035] Embodiment 1

[0036] This example provides a petrified inorganic dry powder coating. Calculated by weight parts, the petrified inorganic dry powder coating includes the following components:

[0037] 40 parts of jade powder, 35 parts of white cement, 5 parts of modified diatomaceous earth, 7.5 parts of slaked lime, 22.5 parts of talc powder, 2 parts of cellulose;

[0038] The jade powder is obtained by crushing Xiuyan jade, calcining it at 650 °C for 1.5 hours, and then ball milling it to a particle size of 1500 mesh.

[0039] The modified diatomaceous earth is obtained by sequentially treating diatomaceous earth with acid washing and a silane coupling agent, including the following process: stirring diatomaceous earth and a 5% hydrochloric acid aqueous solution at room temperature in a weight ratio of 1:12 for 40 minutes, then centrifuging, filtering and drying to obtain the first diatomaceous earth; impregnating the first diatomaceous earth and a 4% silane coupling agent KH-550 ethanol solution at room temperature in a weight ratio of 1:12 for 24 hours, then centrifuging, filtering and drying to obtain the modified diatomaceous earth.

[0040] The white cement is 525 - grade white cement;

[0041] The particle size of the talcum powder is 2000 mesh.

[0042] The preparation method of the above - mentioned jade - like inorganic dry powder coating includes the following steps:

[0043] Add the white cement, modified diatomite and talcum powder into a double - helix mixer for the first stirring and mixing to obtain a first mixture;

[0044] Add cellulose, jade micro - powder and slaked lime to the first mixture for the second stirring and mixing to obtain the jade - like inorganic dry powder coating;

[0045] Among them, the working condition parameters of the first heating and stirring include: temperature is 25 °C, time is 25 min, and rotation speed is 900 rpm; the working condition parameters of the second heating and stirring include: temperature is 55 °C, time is 25 min, and rotation speed is 700 rpm.

[0046] Example 2

[0047] This example provides a jade - like inorganic dry powder coating. By weight, the jade - like inorganic dry powder coating includes the following components:

[0048] 30 parts of jade micro - powder, 30 parts of white cement, 3 parts of modified diatomite, 5 parts of slaked lime, 20 parts of talcum powder, 1 part of cellulose;

[0049] The jade micro - powder is obtained by crushing Xiuyan jade, calcining it at 600 °C for 2 hours, and then ball - milling it to a particle size of 1500 mesh;

[0050] The modified diatomite is obtained by sequentially treating diatomite with acid washing and silane coupling agent, including the following process: Stir the diatomite and 5% hydrochloric acid aqueous solution at room temperature according to a weight ratio of 1:12 for 40 minutes, then centrifuge, filter and dry to obtain the first diatomite; Immerse the first diatomite and 4% silane coupling agent KH - 550 ethanol solution at room temperature according to a weight ratio of 1:12 for 24 hours, then centrifuge, filter and dry to obtain the modified diatomite;

[0051] The white cement is 525 - grade white cement;

[0052] The particle size of the talcum powder is 2000 mesh.

[0053] The preparation method of the above - mentioned jade - like inorganic dry powder coating includes the following steps:

[0054] Add the white cement, modified diatomite and talcum powder into a double - helix mixer for the first stirring and mixing to obtain a first mixture;

[0055] Add cellulose, jade micropowder and slaked lime to the first mixture and conduct secondary stirring and mixing to obtain the vitrified inorganic dry powder coating;

[0056] Among them, the working condition parameters of the first heating and stirring include: temperature 25°C, time 25 min, rotation speed 900 rpm; the working condition parameters of the second heating and stirring include: temperature 55°C, time 25 min, rotation speed 700 rpm.

[0057] Example 3

[0058] This example provides a vitrified inorganic dry powder coating. Calculated by weight parts, the vitrified inorganic dry powder coating includes the following components:

[0059] 50 parts of jade micropowder, 40 parts of white cement, 8 parts of modified diatomaceous earth, 10 parts of slaked lime, 25 parts of talc powder, 3 parts of cellulose;

[0060] The jade micropowder is obtained by crushing Xiuyan jade, calcining at 700°C for 1 hour and then ball-milling to a particle size of 1500 mesh;

[0061] The modified diatomaceous earth is obtained by sequentially treating diatomaceous earth with pickling and a silane coupling agent, including the following process: Stir the diatomaceous earth and a 5% hydrochloric acid aqueous solution at room temperature in a weight ratio of 1:12 for 40 minutes, then centrifuge, filter and dry to obtain the first diatomaceous earth; Immerse the first diatomaceous earth and a 4% silane coupling agent KH-550 ethanol solution at room temperature in a weight ratio of 1:12 for 24 hours, then centrifuge, filter and dry to obtain the modified diatomaceous earth;

[0062] The white cement is 525-grade white cement;

[0063] The particle size of the talc powder is 2000 mesh.

[0064] The preparation method of the above-mentioned vitrified inorganic dry powder coating includes the following steps:

[0065] Add white cement, modified diatomaceous earth and talc powder to a double-screw mixer for primary stirring and mixing to obtain a first mixture;

[0066] Add cellulose, jade micropowder and slaked lime to the first mixture and conduct secondary stirring and mixing to obtain the vitrified inorganic dry powder coating;

[0067] Among them, the working condition parameters of the first heating and stirring include: temperature 25°C, time 25 min, rotation speed 900 rpm; the working condition parameters of the second heating and stirring include: temperature 55°C, time 25 min, rotation speed 700 rpm.

[0068] Comparative Example 1

[0069] This example provides a petrified inorganic dry powder coating and its preparation method. The difference from Example 1 is only that: the jade powder in Example 1 is adjusted to be nephrite jade calcined, crushed and ball milled to a particle size of 1500 mesh; the remaining steps and parameters are the same.

[0070] Comparative Example 2

[0071] This example provides a petrified inorganic dry powder coating and its preparation method. The difference from Example 1 is only that: the modified diatomite in Example 1 is adjusted to be diatomite and a 4% mass fraction of silane coupling agent ethanol solution impregnated at room temperature for 24 hours in a weight ratio of 1:12, and then centrifuged, filtered and dried; the remaining steps and parameters are the same.

[0072] Comparative Example 3

[0073] This example provides a petrified inorganic dry powder coating and its preparation method. The difference from Example 1 is only that: the jade powder in Example 1 is adjusted to be nephrite jade calcined, crushed and ball milled to a particle size of 1500 mesh, and the modified diatomite in Example 1 is adjusted to be diatomite and a 4% mass fraction of silane coupling agent ethanol solution impregnated at room temperature for 24 hours in a weight ratio of 1:12, and then centrifuged, filtered and dried; the remaining steps and parameters are the same.

[0074] Test Example

[0075] This example conducts performance tests on the petrified inorganic dry powder coatings obtained from the above Examples 1 - 3 and Comparative Examples 1 - 3.

[0076] The test methods are as follows: 1) Negative ion release amount: JC / T 2110 - 2012 static method, measure the 24 - hour average release amount in a 1m 3 environmental chamber; 2) Formaldehyde adsorption rate: GB / T 16129 - 1995, coat the coating on a glass plate (thickness 2mm), place it in a chamber with a formaldehyde concentration of 1.0mg / m 3 ³, and detect the difference after 24h; 3) Bond strength: JG / T26 - 2002.

[0077] The test results are shown in Table 1.

[0078] Table 1 Performance Test Results

[0079]

[0080] In summary, the embodiments of the present invention provide a jadeized inorganic dry powder coating and a preparation method thereof. The present invention provides a jadeized inorganic dry powder coating which, through the synergistic action of each component, has high negative ion release amount, high formaldehyde adsorption rate and other properties, realizing the preparation of a multifunctional jadeized inorganic dry powder coating.

[0081] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A petrified inorganic dry powder coating, characterized in that, In parts by weight, the petrified inorganic dry powder coating comprises the following components: 30 - 50 parts of jade powder, 30 - 40 parts of white cement, 3 - 8 parts of modified diatomaceous earth, 5 - 10 parts of slaked lime, 20 - 25 parts of talcum powder, 1 - 3 parts of cellulose; The jade powder is obtained by crushing Xiuyan jade, calcining it and then ball - milling it to a particle size of 1200 - 2000 mesh; The modified diatomaceous earth is obtained by sequentially treating diatomaceous earth with acid washing and a silane coupling agent.

2. The petrified inorganic dry powder coating according to claim 1, wherein In parts by weight, the petrified inorganic dry powder coating comprises the following components: 40 parts of jade powder, 35 parts of white cement, 5 parts of modified diatomaceous earth, 7.5 parts of slaked lime, 22.5 parts of talcum powder, 2 parts of cellulose.

3. The petrified inorganic dry powder coating according to claim 1, wherein, The working condition parameters of the calcination include: temperature 600 - 700 °C, time 1 - 2 hours.

4. The petrified inorganic dry powder coating according to claim 1, wherein The white cement is 525 - grade white cement.

5. The petrified inorganic dry powder coating according to claim 1, characterized in that, The preparation method of the modified diatomaceous earth comprises the following processes: Mix diatomaceous earth and a hydrochloric acid aqueous solution with a mass fraction of 4 - 6% at a weight ratio of 1:(10 - 15) at room temperature for 30 - 45 minutes, then centrifuge, filter and dry to obtain the first diatomaceous earth; Immerse the first diatomaceous earth and a silane coupling agent ethanol solution with a mass fraction of 3 - 5% at a weight ratio of 1:(10 - 15) at room temperature for 24 hours, then centrifuge, filter and dry to obtain the modified diatomaceous earth.

6. The petrified inorganic dry powder coating according to claim 1, characterized in that, The silane coupling agent includes silane coupling agent KH - 550.

7. The petrified inorganic dry powder coating according to claim 1, characterized in that The particle size of the talcum powder is 2000 mesh.

8. A method for preparing the petrified inorganic dry powder coating according to any one of claims 1 to 7, characterized in that, The preparation method comprises the following steps: Add white cement, modified diatomaceous earth and talcum powder into a double - helix mixer for the first stirring and mixing to obtain a first mixture; Add cellulose, jade powder and slaked lime to the first mixture for the second stirring and mixing to obtain the petrified inorganic dry powder coating.

9. The preparation method of the petrified inorganic dry powder coating according to claim 8, characterized in that, The working condition parameters of the first heating and stirring include: temperature 20 °C - 30 °C, time 20 - 30 min, rotation speed 800 - 1000 rpm; the working condition parameters of the second heating and stirring include: temperature 50 °C - 60 °C, time 20 - 30 min, rotation speed 500 - 800 rpm.

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