A water-based ceiling paint, and a preparation method and application thereof

Abstract

The application provides a water-based ceiling paint, a preparation method and application thereof, and components of the water-based ceiling paint include 10-20 parts of water-based acrylic emulsion, 3-7 parts of diatomite, 15-23 parts of quartz powder, 15-25 parts of titanium white powder, 2-4 parts of film-forming aid, 0.7-1.5 parts of dispersant and 0.5-1.5 parts of thickening agent in terms of weight. The water-based ceiling paint solves the problem that the reflection effects of the front and side gloss of the paint film are inconsistent, meanwhile, the raw material is water-based and environmentally friendly, does not cause harm to the users, is friendly to the environment, and has certain reference significance and industrial value for paint manufacturers.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of paint processing, and particularly relates to a water-based ceiling paint and a preparation method and application thereof. BACKGROUND

[0002] The development of interior wall latex paint has a history of nearly 70 years, and it is widely used in the field of indoor decoration. The performance of related products and supporting systems are becoming more and more perfect. At present, the research direction of various manufacturers is environmental friendly, low volatile organic compounds VOC, low odor, increasing function, reducing cost and the like. With the downward trend of real estate market, the competition of building paint sales is more fierce. How to occupy a place in the increasingly saturated and downward market has become a problem that must be considered by various paint manufacturers. Among them, improving the influence of product brand and giving the product differentiated performance are the focus of research of various manufacturers.

[0003] In the process of indoor decoration, the cement-based wall surface is uneven. The normal construction process is that the cement-based wall surface needs to be first leveled with interior wall putty, and then the primer and topcoat are applied after the entire wall surface is leveled by troweling. This process is necessary. If the primer and topcoat are directly brushed without leveling, you can obviously see that the wall surface is uneven after completely drying, because the substrate is uneven. Especially when looking at the light, this problem is particularly obvious. However, we usually use putty to level, so there is no such problem. However, the ceiling and the wall top, especially the industrial building, workers sometimes do not apply putty to level. Therefore, the indoor wall surface will have such a problem that the gloss is high in some places and low in some places. This problem is more obvious on the wall top than on the facade, because the wall top has light. Under the reflection of light, the unevenness of the wall top is exposed.

[0004] Therefore, it is an urgent problem in the field to develop a water-based ceiling paint to solve the light and shadow change problem existing in the construction of indoor decoration ceiling and wall top. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the present application is to provide a water-based ceiling paint to solve the light and shadow change problem existing after the ordinary latex paint is applied to the construction of indoor decoration ceiling and wall top.

[0006] To achieve this purpose, the technical scheme adopted by the present application is as follows:

[0007] In a first aspect, the present application provides a water-based ceiling paint, the components of the water-based ceiling paint include, by weight: 10-20 parts of water-based acrylic emulsion, 3-7 parts of diatomite, 15-23 parts of quartz powder, 15-25 parts of titanium white powder, 2-4 parts of film-forming aid, 0.7-1.5 parts of dispersing agent and 0.5-1.5 parts of thickening agent.

[0008] The 3-7 parts of diatomite and 15-23 parts of quartz powder are the most suitable amount, and the paint film becomes gray when the diatomite exceeds, and the surface flatness of the paint film becomes poor when the quartz powder exceeds. The diatomite itself has a gray color, and the paint film will become gray when the addition amount exceeds a certain amount, and the relative particle size of the 600 mesh quartz powder is relatively high, and too much addition will make the surface of the latex paint rough.

[0009] The light gloss received by the human eye causes the intuitive feeling of light and shadow change, so by adjusting the reflection effect of the wall coating on light, reducing the light reflection of the gloss at each angle, making the 60° and 85° gloss tend to be the minimum value, and reducing the gap between the two, then the human eye from any angle observes the wall surface His feeling is consistent.

[0010] The weight parts of the water-based acrylic emulsion are 10-20 parts, for example, can be 10 parts, 12 parts, 15 parts, 18 parts, 20 parts, and specific point values between the above point values, limited to the length and for the sake of simplicity, the present application will not exhaustively list the specific point values included in the range.

[0011] The weight parts of the diatomite are 3-7 parts, for example, can be 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, and specific point values between the above point values, limited to the length and for the sake of simplicity, the present application will not exhaustively list the specific point values included in the range.

[0012] The weight parts of the quartz powder are 15-23 parts, for example, can be 15 parts, 18 parts, 20 parts, 22 parts, 23 parts, and specific point values between the above point values, limited to the length and for the sake of simplicity, the present application will not exhaustively list the specific point values included in the range.

[0013] The weight parts of the titanium dioxide are 15-25 parts, for example, can be 15 parts, 18 parts, 20 parts, 22 parts, 23 parts, 25 parts, and specific point values between the above point values, limited to the length and for the sake of simplicity, the present application will not exhaustively list the specific point values included in the range.

[0014] The weight parts of the film-forming aid are 2-4 parts, for example, can be 2 parts, 3 parts, 4 parts, and specific point values between the above point values, limited to the length and for the sake of simplicity, the present application will not exhaustively list the specific point values included in the range.

[0015] The weight parts of the dispersant are 0.7-1.5 parts, for example, can be 0.8 parts, 0.9 parts, 1 part, 1.2 parts, 1.4 parts, 1.5 parts, and specific point values between the above point values, limited to the length and for the sake of simplicity, the present application will not exhaustively list the specific point values included in the range.

[0016] The thickener is present in a weight range of 0.5-1.5 parts, for example, 0.5 parts, 0.8 parts, 1 part, 1.2 parts, 1.5 parts, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific values ​​included in the range.

[0017] Preferably, the median particle size of the diatomaceous earth is ≤10μm, for example, it can be 1μm, 2μm, 3μm, 4μm, 5μm, 8μm, 10μm, and specific particle sizes between the above values. Due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific particle sizes included in the range.

[0018] Preferably, the fineness of the quartz powder is 500-600 mesh, for example, it can be 500 mesh, 520 mesh, 550 mesh, 580 mesh, 600 mesh, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0019] Preferably, the titanium dioxide includes rutile titanium dioxide.

[0020] Preferably, the titanium dioxide content in the rutile titanium dioxide is 95-99%, for example, it can be 95%, 96%, 97%, 98%, 99%, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0021] Preferably, the film-forming aid comprises lipid and / or ether solvents.

[0022] Preferably, the film-forming aid comprises dodecyl alcohol ester and / or dipropylene glycol butyl ether.

[0023] Preferably, the dispersant comprises a polyacrylate dispersant.

[0024] Preferably, the polyacrylate dispersant is French SUPERDES 680 or Shenzhen Zhuneng EnableZN45.

[0025] Preferably, the thickener comprises a nonionic hydrophobic modified polyurethane rheology agent.

[0026] Preferably, the nonionic hydrophobic modified polyurethane rheology modifier includes a water-based nonionic synergistic rheology modifier, such as RM 12W or Mingling PUR44.

[0027] Preferably, the water-based ceiling paint further comprises, by weight, 0.2-0.5 parts cellulose, 0.1-0.3 parts wetting agent, 0.2-0.4 parts defoamer, 0.1-0.2 parts pH adjuster, 0.1-0.3 parts preservative, 0.5-1 part antifreeze and 20-37 parts water.

[0028] The cellulose is 0.2-0.5 parts by weight, for example, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0029] The wetting agent is 0.1-0.3 parts by weight, for example, 0.1 parts, 0.2 parts, 0.3 parts, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0030] The defoamer is present in a weight ratio of 0.2-0.4 parts, for example, 0.2 parts, 0.3 parts, 0.4 parts, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific values ​​included in the range.

[0031] The pH adjuster is present in a weight ratio of 0.1-0.2 parts, for example, 0.1 parts, 0.2 parts, and specific values ​​between the above-mentioned values. Due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific values ​​included in the range.

[0032] The preservative is present in a weight range of 0.1-0.3 parts, for example, 0.1 parts, 0.2 parts, 0.3 parts, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific values ​​included in the range.

[0033] The antifreeze is present in a weight ratio of 0.5-1 part, for example, 0.5 parts, 0.8 parts, 1 part, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific values ​​included in the range.

[0034] The water is in the range of 20-37 parts by weight, for example, 20 parts, 25 parts, 28 parts, 30 parts, 32 parts, 35 parts, 37 parts, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific values ​​included in the range.

[0035] Preferably, the cellulose comprises hydroxyethyl cellulose.

[0036] Preferably, the wetting agent includes a water-based architectural coating pigment and filler wetting agent, and the wetting agent includes a siloxane wetting agent, such as Dow BD109 wetting agent BD-109 (90%).

[0037] Preferably, the defoamer includes a polymer-composite mineral oil defoamer.

[0038] Preferably, the polymer-composite mineral oil defoamer includes molecular-level defoaming substances.

[0039] The molecular-level defoaming substance is a polymer-composite mineral oil defoamer, such as BASF Foamstarst2410AC.

[0040] The defoaming mechanism of the molecular-level defoaming substance is unique. Unlike other commonly used mineral oil and silicone oil-based defoaming substances, this defoamer also has a wetting effect that traditional defoamers do not possess.

[0041] Preferably, the pH adjuster comprises 2-amino-2-methyl-1-propanol.

[0042] Preferably, the preservative includes isothiazolinone bactericides.

[0043] Preferably, the antifreeze agent comprises propylene glycol.

[0044] In a second aspect, the present invention provides a method for preparing a water-based ceiling paint as described in the first aspect, the method comprising:

[0045] The water-based ceiling paint is obtained by mixing water-based acrylic emulsion, titanium dioxide, diatomaceous earth, quartz powder, film-forming aid, dispersant, thickener and water.

[0046] Preferably, the dispersant, wetting agent, defoamer, cellulose, pH adjuster, and water are mixed and stirred for the first time. Titanium dioxide, diatomaceous earth, and quartz sand are added and stirred for the second time. Film-forming aid, preservative, water-based acrylic emulsion, antifreeze, and thickener are added and stirred for the third time to obtain the water-based ceiling paint.

[0047] Preferably, the speed of the first stirring is 500-600 r / min, for example, it can be 500 r / min, 520 r / min, 550 r / min, 580 r / min, 600 r / min, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0048] Preferably, the first stirring time is 3-5 minutes, for example, it can be 3 minutes, 3.5 minutes, 4 minutes, 4.5 minutes, 5 minutes, and specific values ​​between the above points. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0049] Preferably, the speed of the second stirring is 1000-1200 r / min, for example, it can be 1000 r / min, 1050 r / min, 1100 r / min, 1150 r / min, 1200 r / min, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0050] Preferably, the second stirring time is 20-30 minutes, for example, 20 minutes, 22 minutes, 25 minutes, 28 minutes, 30 minutes, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific values ​​included in the range.

[0051] Preferably, the speed of the third stirring is 500-700 r / min, for example, it can be 500 r / min, 550 r / min, 600 r / min, 650 r / min, 700 r / min, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0052] Preferably, the third stirring time is 8-15 minutes, for example, it can be 8 minutes, 10 minutes, 12 minutes, 15 minutes, and specific values ​​between the above points. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0053] Thirdly, the present invention provides an application of the water-based ceiling paint as described in the first aspect in building materials.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] The water-based ceiling paint provided by this invention solves the problem of inconsistent gloss reflection between the front and side surfaces of the paint film. Furthermore, the raw materials are water-based and environmentally friendly, posing no harm to users and being environmentally friendly. It has certain reference value and industrial value for paint manufacturers. The gloss is 2.6-3.5 at 60°, 1.7-5.7 at 85°, with a finished product fineness of 35-100μm and a gloss difference of 0.9-2.2. Detailed Implementation

[0056] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0057] The experimental materials used in the embodiments and comparative examples of this invention are as follows:

[0058] (1) Waterborne acrylic emulsion: Polymers of styrene / acrylate copolymer, such as Badifu RS-998A and Jiangsu Sunrise 6130B;

[0059] (2) Titanium dioxide: Rutile titanium dioxide, titanium dioxide content of more than 95%, Longmang R996, DuPont R902+;

[0060] (3) Diatomaceous earth: median particle size ≤10μm, CELITE 499;

[0061] (4) Quartz powder: fineness 600 mesh, Shanghai Aobo Chemical 600 mesh quartz powder, Shanghai Aobo 125, 400 mesh, 1250 mesh;

[0062] (5) Film-forming aid: Alcohol ester-12 Runtai Chemical, Shengxingxing COASOL 290PLUS;

[0063] (6) Cellulose: Hydroxyethyl cellulose (HEC), Ashland NATROSOL 250HBR;

[0064] (7) Dispersant: Low molecular weight polyacrylate dispersant, French Essen SUPERDES 680, Shenzhen Zhuneng Enable ZN45;

[0065] (8) Wetting agent: Dow BD109 wetting agent BD-109 (90%);

[0066] (9) Defoamer: Polymer composite mineral oil defoamer, BASF Foamstar st 2410AC;

[0067] (10) pH adjuster: Manufacturer: Dow, Brand: DOWAMP-95;

[0068] (11) Preservatives: Isothiazolinone bactericides, used as in-can corrosion protection, ACTICIDE RS, MBS;

[0069] (12) Thickener: Nonionic hydrophobic modified polyurethane rheology modifier, RM 12W, Mingling PUR44;

[0070] (13) Antifreeze: Anze Chemical Propylene Glycol;

[0071] (14) Matte powder: Grace SYLOID 7000;

[0072] (15) Heavy calcium carbonate: Jiangxi Guangyuan Chemical 800 mesh calcium carbonate;

[0073] (16) Kaolin: Inner Mongolia Tianzhijiao TZJ-2;

[0074] (17) Talc: Guangxi Fujian Building Materials Refining MS800;

[0075] (18) Needle-shaped wollastonite: Wenqi Chemical 5-15μm.

[0076] Example 1

[0077] This embodiment provides a water-based ceiling paint and its preparation method. The components of the water-based ceiling paint, by weight, include: 17 parts water-based acrylic emulsion, 5 parts diatomaceous earth, 13 parts 600-mesh quartz powder, 22 parts titanium dioxide, 3 parts film-forming aid, 0.7 parts dispersant, 1 part thickener, and 36.6 parts water; 0.3 parts cellulose, 0.2 parts wetting agent, 0.3 parts defoamer, 0.1 parts pH adjuster, 0.3 parts preservative, and 0.5 parts antifreeze.

[0078] The preparation method includes:

[0079] 1. Accurately weigh the raw materials in the above formula, add the accurately weighed water to the mixing tank or a suitable container, turn on the disperser, and slowly add the dispersant, wetting agent, defoamer, cellulose, and pH adjuster in sequence at a low speed of 600r / min. Stir for 5 minutes after the addition is complete.

[0080] 2. Then add titanium dioxide, diatomaceous earth, and quartz sand, and gradually increase the rotation speed to 1200 r / min. Use a small amount of water to wash the cylinder wall and the powder remaining on the dispersion shaft. Disperse at high speed for 30 min until the fineness is ≤40μm.

[0081] 3. Reduce the rotation speed to 700 r / min, add film-forming aid, preservative, water-based acrylic emulsion, and antifreeze, stir for 5 min, add thickener, adjust to the required viscosity, and continue stirring for 10 min to obtain water-based ceiling paint.

[0082] Example 2

[0083] This embodiment provides a water-based ceiling paint and its preparation method. The only difference between the components of the water-based ceiling paint and those in Example 1 is that the water-based ceiling paint contains 15 parts of quartz powder and 34.6 parts of water.

[0084] Example 3

[0085] This embodiment provides a water-based ceiling paint and its preparation method. The only difference between the components of the water-based ceiling paint and those in Example 1 is that the water-based ceiling paint contains 23 parts quartz powder and 25.6 parts water.

[0086] Example 4

[0087] This embodiment provides a water-based ceiling paint and its preparation method. The only difference between the water-based ceiling paint and the one in Example 1 is the use of 125-mesh quartz powder.

[0088] Example 5

[0089] This embodiment provides a water-based ceiling paint and its preparation method. The only difference between the water-based ceiling paint and the one in Example 1 is the use of 400-mesh quartz powder.

[0090] Example 6

[0091] This embodiment provides a water-based ceiling paint and its preparation method. The only difference between the water-based ceiling paint and the one in Example 1 is the use of 1250 mesh quartz powder.

[0092] Example 7

[0093] This embodiment provides a water-based ceiling paint and its preparation method. The difference between the components of the water-based ceiling paint and those of Example 1 is that it uses 15 parts water-based acrylic emulsion, 4 parts diatomaceous earth, 20 parts quartz powder, 18 parts titanium dioxide, 2 parts film-forming aid, 0.7 parts dispersant, and 1.5 parts thickener.

[0094] Comparative Example 1

[0095] This comparative example provides a water-based ceiling paint and its preparation method, which differs from Example 1 only in that the quartz powder is replaced with the same amount of mica powder by weight.

[0096] Comparative Example 2

[0097] This comparative example provides a water-based ceiling paint and its preparation method, which differs from Example 1 only in that the quartz powder is replaced with the same weight of water-based acrylic polymer microspheres.

[0098] Comparative Example 3

[0099] This comparative example provides a water-based ceiling paint and its preparation method, which differs from Example 1 only in that the quartz powder is replaced with the same amount of matting powder by weight.

[0100] Comparative Example 4

[0101] This comparative example provides a water-based ceiling paint and its preparation method, which differs from Example 1 only in that the quartz powder is replaced with the same weight of 800-mesh heavy calcium carbonate.

[0102] Comparative Example 5

[0103] This comparative example provides a water-based ceiling paint and its preparation method, which differs from Example 1 only in that the quartz powder is replaced with the same weight of kaolin.

[0104] Comparative Example 6

[0105] This comparative example provides a water-based ceiling paint and its preparation method, which differs from Example 1 only in that the quartz powder is replaced with the same amount of 800-mesh talc powder by weight.

[0106] Comparative Example 7

[0107] This comparative example provides a water-based ceiling paint and its preparation method, which differs from Example 1 only in that the quartz powder is replaced with the same weight of needle-shaped silica lime.

[0108] Comparative Example 8

[0109] This comparative example provides a latex paint (superior grade) from Nippon Paint, brand name Bamboo Charcoal Anti-mildew Additive-Free Five-in-One.

[0110] Comparative Example 9

[0111] This comparative example provides a water-based ceiling paint and its preparation method, which differs from Example 1 only in that the amount of quartz powder added is 10 parts.

[0112] Comparative Example 10

[0113] This comparative example provides a water-based ceiling paint and its preparation method, which differs from Example 1 only in that the amount of quartz powder added is 26 parts.

[0114] Comparative Example 11

[0115] This comparative example provides a water-based ceiling paint and its preparation method, which differs from Example 1 only in that the amount of diatomaceous earth added is 2 parts.

[0116] Comparative Example 12

[0117] This comparative example provides a water-based ceiling paint and its preparation method, which differs from Example 1 only in that the amount of diatomaceous earth added is 8 parts.

[0118] The performance of the water-based ceiling paints provided in Examples 1-7 and Comparative Examples 1-12 was tested, and the specific methods are as follows:

[0119] (1) Gloss test: Nineteen water-based ceiling paint samples were prepared according to the manufacturing process, and films were made on each sample. A 150-micron wet film preparation device was used to prepare the film on a paper card. After the paint film was surface dry, it was placed in a 50℃ oven for 30 minutes and then removed. The gloss of the dried paint film was tested using a 60 / 85 degree gloss meter.

[0120] (2) Finished product fineness: GB / T 6753-2007;

[0121] (3) Whiteness: GB / T 5006-2019;

[0122] (4) Surface finish of paint film: GB / T 9756-2018, tested according to 5.5.6;

[0123] (5) Other properties: Refer to GB / T 9756-2018 Synthetic Resin Emulsion Interior Wall Coatings. The test results are shown in Table 1-2.

[0124] Table 1

[0125]

[0126]

[0127] Table 2

[0128]

[0129]

[0130] As shown in Table 1, the gloss differences between 60° and 85° in Examples 6 and Comparative Examples 1, 3-9, and 11 are all above 2°, which does not meet the design requirements. The paint film in Example 5 appears grayish. The paint film surfaces in Examples 4, 5, and Comparative Example 10 are uneven. The water-based acrylic polymer microspheres used in Comparative Example 2 are too expensive (50-70 RMB / kg), which would result in excessive costs in architectural coatings seeking the ultimate cost-effectiveness; therefore, this approach is not recommended. Thus, the quartz powder used in Examples 1-3 and 7, when mixed in a suitable proportion, significantly reduces the side gloss and narrows the difference between 60° and 85°, meeting the experimental requirements.

[0131] As shown in Table 2, the water-based ceiling paint obtained in Example 1 did not exhibit stratification or sedimentation after being stored at 50°C for 14 days. It had a hiding power >95, excellent scrub resistance, passed freeze-thaw stability test, and the product system was stable, meeting the superior grade standard of GB / T 9756-2018 Synthetic Resin Emulsion Interior Wall Coatings.

[0132] The applicant declares that this invention illustrates a water-based ceiling paint, its preparation method, and its application through the above embodiments. However, this invention is not limited to the above embodiments, meaning that this invention does not necessarily rely on the above embodiments for implementation. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of raw materials, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection and disclosure scope of this invention.

Claims

1. A water-based ceiling paint, characterized in that, The components of the water-based ceiling paint, by weight, include: 10-20 parts water-based acrylic emulsion, 3-7 parts diatomaceous earth, 15-23 parts quartz powder, 15-25 parts titanium dioxide, 2-4 parts film-forming aid, 0.7-1.5 parts dispersant, and 0.5-1.5 parts thickener. The fineness of the quartz powder is 500-600 mesh; The water-based ceiling paint has a 60° gloss of 2.6-3.5 and an 85° gloss of 1.7-5.

7.

2. The water-based ceiling paint according to claim 1, characterized in that, The median particle size of the diatomite is ≤10μm.

3. The water-based ceiling paint according to claim 1, characterized in that, The titanium dioxide includes rutile titanium dioxide.

4. The water-based ceiling paint according to claim 3, characterized in that, The rutile titanium dioxide contains 95-99% titanium dioxide.

5. The water-based ceiling paint according to claim 1, characterized in that, The film-forming aids include ester and / or ether solvents.

6. The water-based ceiling paint according to claim 1, characterized in that, The film-forming aids include dodecyl alcohol ester and / or dipropylene glycol butyl ether.

7. The water-based ceiling paint according to claim 1, characterized in that, The dispersant includes a polyacrylate dispersant.

8. The water-based ceiling paint according to claim 1, characterized in that, The thickener includes a nonionic hydrophobic modified polyurethane rheology agent.

9. The water-based ceiling paint according to claim 8, characterized in that, The nonionic hydrophobic modified polyurethane rheology modifier includes a water-based nonionic synergistic rheology modifier.

10. The water-based ceiling paint according to claim 1, characterized in that, The water-based ceiling paint also includes, by weight, 0.2-0.5 parts cellulose, 0.1-0.3 parts wetting agent, 0.2-0.4 parts defoamer, 0.1-0.2 parts pH adjuster, 0.1-0.3 parts preservative, 0.5-1 part antifreeze and 20-37 parts water.

11. The water-based ceiling paint according to claim 10, characterized in that, The cellulose includes hydroxyethyl cellulose.

12. The water-based ceiling paint according to claim 10, characterized in that, The wetting agent includes water-based architectural coating pigments and fillers wetting agents.

13. The water-based ceiling paint according to claim 10, characterized in that, The defoamer includes polymer-composite mineral oil defoamers.

14. The water-based ceiling paint according to claim 13, characterized in that, The polymer-composite mineral oil defoamer includes molecular-level defoaming substances.

15. The water-based ceiling paint according to claim 10, characterized in that, The pH adjuster includes 2-amino-2-methyl-1-propanol.

16. The water-based ceiling paint according to claim 10, characterized in that, The preservatives include isothiazolinone bactericides.

17. The water-based ceiling paint according to claim 10, characterized in that, The antifreeze includes propylene glycol.

18. A method for preparing a water-based ceiling paint as described in any one of claims 1-17, characterized in that, The preparation method includes: The water-based ceiling paint is obtained by mixing water-based acrylic emulsion, titanium dioxide, diatomaceous earth, quartz powder, film-forming aid, dispersant, thickener and water.

19. The preparation method according to claim 18, characterized in that, The dispersant, wetting agent, defoamer, cellulose, pH adjuster, and water are mixed and stirred for the first time. Titanium dioxide, diatomaceous earth, and quartz sand are added and stirred for the second time. Film-forming aid, preservative, water-based acrylic emulsion, antifreeze, and thickener are added and stirred for the third time to obtain the water-based ceiling paint.

20. The preparation method according to claim 19, characterized in that, The initial stirring speed is 500-600 r / min.

21. The preparation method according to claim 19, characterized in that, The first stirring time is 3-5 minutes.

22. The preparation method according to claim 19, characterized in that, The second stirring speed is 1000-1200 r / min.

23. The preparation method according to claim 19, characterized in that, The second stirring time is 20-30 minutes.

24. The preparation method according to claim 19, characterized in that, The third stirring speed is 500-700 r / min.

25. The preparation method according to claim 19, characterized in that, The third stirring time is 8-15 minutes.

26. The application of a water-based ceiling paint as described in any one of claims 1-17 in building materials.

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