Sand velvet texture coating as well as preparation method and construction method thereof

Abstract

The invention relates to the technical field of coatings, and discloses a sand velvet texture coating. The sand velvet texture coating comprises deionized water, hydrophobic modified cellulose, an organic silicon defoaming agent, a sand velvet thixotropic agent, a polycarboxylic acid sodium salt dispersing agent, a wetting agent, rutile titanium dioxide, spherical silica powder, an acrylic emulsion, a PH value regulator, propylene glycol, an alkyd 12 film-forming agent, a sterilizing agent and an alkali swelling thickening agent. The components such as the spherical silica powder and the sand velvet thixotropic agent are added in the ratio of the coating, so that the formed coating has better sand velvet texture, stronger stereoscopic impression and better visual effect.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and in particular to a velvet texture coating and a preparation method and a construction method thereof. Background Art

[0002] Paint, traditionally known as varnish in China, is a viscous liquid applied to the surface of an object to be protected or decorated, and can form a firmly adhered, continuous film with the coated object. It is usually a resin, oil, or emulsion-based material, with or without pigments and fillers, and with corresponding additives, and is prepared with organic solvents or water. The book "Coating Technology", a relatively authoritative book in the Chinese coatings industry, defines it as follows: "Coating is a material that can be applied to the surface of an object using different construction techniques to form a solid film that adheres firmly, has a certain strength, and is continuous. The film formed in this way is generally called a coating film, also known as a paint film or coating." The paint film or coating formed by the existing paint is flat, with poor viewing effect and no three-dimensional effect, which cannot meet the needs of customers. Summary of the Invention

[0003] The purpose of the present invention is to provide a velvet texture paint and its preparation method and construction method, which solves the problem that the paint film or coating formed by the existing paint has no three-dimensional effect, poor viewing effect, and cannot meet customer needs.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: A velvet texture paint comprises the following components in parts by weight: 19.5-21.5 parts by weight of deionized water; 0.48-0.53 parts by weight of hydrophobically modified cellulose; 0.57-0.63 parts by weight of silicone defoamer; 0.5-1.5 parts by weight of sand fleece thixotropic agent; 1.1-1.3 parts by weight of a polycarboxylate sodium salt dispersant; Wetting agent 0.19-0.21 parts by weight; 0.95-1.05 parts by weight of rutile titanium dioxide; 38-42 parts by weight of spherical silicon powder; Acrylic emulsion 28.5-31.5 parts by weight; 0.57-0.63 parts by weight of pH regulator; 1.9-2.1 parts by weight of propylene glycol; 1.9-2.1 parts by weight of alkyd dodecyl film-forming agent; 0.48-0.53 parts by weight of fungicide; 0.1-0.5 parts by weight of alkali swelling thickener

[0005] The manufacturer or brand of the hydrophobically modified cellulose is Ashland, the manufacturer or brand of the silicone defoamer and sand fleece thixotropic agent is Dow Corning, the manufacturer or brand of the sodium polycarboxylate dispersant and wetting agent is Nopco, the manufacturer or brand of rutile titanium dioxide is Jinan Yuxing, the manufacturer or brand of spherical silica micropowder is Jingshengyuan, the manufacturer or brand of acrylic emulsion is Badfu, the manufacturer or brand of pH regulator is Dow, the manufacturer or brand of propylene glycol and alkyd dodecyl film-forming agent is Eastman, and the manufacturer or brand of bactericide and alkali swelling thickener is Lotus.

[0006] The present invention is further configured as follows: 20.5 parts by weight of deionized water, 0.5 parts by weight of hydrophobically modified cellulose, 0.6 parts by weight of silicone defoamer, 0.5-1.5 parts by weight of velvet thixotropic agent, 1.2 parts by weight of sodium polycarboxylate dispersant, 0.2 parts by weight of wetting agent, 1 part by weight of rutile titanium dioxide, 40 parts by weight of spherical silicon powder, 30 parts by weight of acrylic emulsion, 0.57-0.63 parts by weight of pH regulator, 2 parts by weight of propylene glycol, 2 parts by weight of alkyd dodecyl film-forming agent, 0.5 parts by weight of bactericide, and 0.1-0.5 parts by weight of alkali swelling thickener.

[0007] A method for preparing a velvet textured paint comprises the following steps: Step 1: Add 19.5-21.5 parts by weight of deionized water into a container; Step 2: Turn on the disperser and adjust the speed of the disperser to 475-525 r / min, then add 0.48-0.53 parts by weight of hydrophobically modified cellulose, 0.57-0.63 parts by weight of silicone defoamer, 0.5-1.5 parts by weight of velvet thixotropic agent, 1.1-1.3 parts by weight of polycarboxylate sodium salt dispersant, 0.19-0.21 parts by weight of wetting agent, 0.95-1.05 parts by weight of rutile titanium dioxide, and 38-42 parts by weight of spherical silica powder into the container in sequence; Step 3: Increase the speed of the disperser to 1450-1550 r / min and disperse at high speed for 45-55 minutes; Step 4: Adjust the speed of the disperser to 750-850 r / min, and add 28.5-31.5 parts by weight of acrylic emulsion, 0.57-0.63 parts by weight of pH regulator, 1.9-2.1 parts by weight of propylene glycol, 1.9-2.1 parts by weight of alkyd dodecyl film-forming agent, and 0.48-0.53 parts by weight of fungicide into the container in sequence; Step 5: Add 0.1-0.5 parts by weight of an alkali-swellable thickener into the container and adjust the viscosity to 94-96 ku; Step 6: Color adjustment; Step 7: Unloading and packaging.

[0008] The present invention is further configured such that: after step 3, the fineness of the semi-finished coating is controlled to be ≤60 μm.

[0009] A construction method for a velvet textured paint comprises the following steps: Step 1: Set a putty layer on the base layer; Step 2: After the putty layer is completely dry, use a long-haired roller to apply 2-3 layers of the same color anti-alkali primer on the putty layer. The amount of primer is 8-10 m2 / kg. Step 3: After the same color anti-alkali primer layer is completely dry, use the W-77G spray gun to spray the sand velvet texture paint on the same color anti-alkali primer layer 1-2 times. The amount of sand velvet texture paint is 2-3 m2 / kg. Step 4: After the velvet texture paint is completely dry, use 240-400 grit white velvet sandpaper to polish the paint surface, remove uneven spots and clean up the dust; Step 5: Use a long-bristled roller to apply the matte topcoat 1-2 times.

[0010] The present invention is further configured as follows: in step 3, the spray gun pressure is 0.75-0.85 Mpa.

[0011] During construction, the construction foundation must be flat and solid, with a moisture content of less than 10%; The construction temperature is lower than 5 degrees Celsius and the relative humidity is less than 85%. After each process is completely dry, the next process can be carried out.

[0012] The outstanding effects of the present invention are: Compared with the existing technology, by adding spherical silica powder and sand velvet thixotropic agent and other components into the coating ratio, the formed coating can have a better sand velvet texture, a stronger three-dimensional sense, and a better visual effect, but it still feels smooth to the touch. DETAILED DESCRIPTION

[0013] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0014] A velvet texture paint comprises the following components in parts by weight: 19.5-21.5 parts by weight of deionized water; 0.48-0.53 parts by weight of hydrophobically modified cellulose; 0.57-0.63 parts by weight of silicone defoamer; 0.5-1.5 parts by weight of sand fleece thixotropic agent; 1.1-1.3 parts by weight of a polycarboxylate sodium salt dispersant; Wetting agent 0.19-0.21 parts by weight; 0.95-1.05 parts by weight of rutile titanium dioxide; 38-42 parts by weight of spherical silicon powder; Acrylic emulsion 28.5-31.5 parts by weight; 0.57-0.63 parts by weight of pH regulator; 1.9-2.1 parts by weight of propylene glycol; 1.9-2.1 parts by weight of alkyd dodecyl film-forming agent; 0.48-0.53 parts by weight of fungicide; 0.1-0.5 parts by weight of alkali swelling thickener

[0015] The deionized water is 20.5 parts by weight, the hydrophobically modified cellulose is 0.5 parts by weight, the silicone defoamer is 0.6 parts by weight, the velvet thixotropic agent is 0.5-1.5 parts by weight, the sodium polycarboxylate dispersant is 1.2 parts by weight, the wetting agent is 0.2 parts by weight, the rutile titanium dioxide is 1 part by weight, the spherical silicon powder is 40 parts by weight, the acrylic emulsion is 30 parts by weight, the pH value regulator is 0.57-0.63 parts by weight, the propylene glycol is 2 parts by weight, the alkyd dodecyl film-forming agent is 2 parts by weight, the bactericide is 0.5 parts by weight, and the alkali swelling thickener is 0.1-0.5 parts by weight.

[0016] A method for preparing a velvet textured paint comprises the following steps: Step 1: Add 19.5-21.5 parts by weight of deionized water into a container; Step 2: Turn on the disperser and adjust the speed of the disperser to 475-525 r / min, then add 0.48-0.53 parts by weight of hydrophobically modified cellulose, 0.57-0.63 parts by weight of silicone defoamer, 0.5-1.5 parts by weight of velvet thixotropic agent, 1.1-1.3 parts by weight of polycarboxylate sodium salt dispersant, 0.19-0.21 parts by weight of wetting agent, 0.95-1.05 parts by weight of rutile titanium dioxide, and 38-42 parts by weight of spherical silica powder into the container in sequence; Step 3: Increase the speed of the disperser to 1450-1550 r / min and disperse at high speed for 45-55 minutes; Step 4: Adjust the speed of the disperser to 750-850 r / min, and add 28.5-31.5 parts by weight of acrylic emulsion, 0.57-0.63 parts by weight of pH regulator, 1.9-2.1 parts by weight of propylene glycol, 1.9-2.1 parts by weight of alkyd dodecyl film-forming agent, and 0.48-0.53 parts by weight of fungicide into the container in sequence; Step 5: Add 0.1-0.5 parts by weight of an alkali-swellable thickener into the container and adjust the viscosity to 94-96 ku; Step 6: Color adjustment; Step 7: Unloading and packaging.

[0017] After step 3, the fineness of the semi-finished coating is controlled to be ≤60 μm.

[0018] A construction method for a velvet textured paint comprises the following steps: Step 1: Set a putty layer on the base layer; Step 2: After the putty layer is completely dry, use a long-haired roller to apply 2-3 layers of the same color anti-alkali primer on the putty layer. The amount of primer is 8-10 m2 / kg. Step 3: After the same color anti-alkali primer layer is completely dry, use the W-77G spray gun to spray the sand velvet texture paint on the same color anti-alkali primer layer 1-2 times. The amount of sand velvet texture paint is 2-3 m2 / kg. Step 4: After the velvet texture paint is completely dry, use 240-400 grit white velvet sandpaper to polish the paint surface, remove uneven spots and clean up the dust; Step 5: Use a long-bristled roller to apply the matte topcoat 1-2 times.

[0019] In step 3, the spray gun pressure is 0.75-0.85 MPa.

[0020] The coating structure from bottom to top is base layer, putty layer, same color anti-alkali primer layer, velvet texture paint layer and topcoat layer.

[0021] Example 1: Step 1: 205 kg of deionized water was added to a container; Step 2: Turn on the disperser and adjust the speed of the disperser to 475-525 r / min. Then, add 5 kg of hydrophobically modified cellulose, 6 kg of silicone defoamer, 12 kg of polycarboxylate sodium salt dispersant, 2 kg of wetting agent, 10 kg of rutile titanium dioxide, and 400 kg of 120-180 mesh quartz sand into the container in sequence; Step 3: Increase the speed of the disperser to 1450-1550 r / min, disperse at high speed for 45-55 minutes, and control the fineness of the semi-finished coating to ≤60 μm; Step 4: Adjust the speed of the disperser to 750-850 r / min, and add 300 kg of acrylic emulsion, 6 kg of pH regulator, 20 kg of propylene glycol, 20 kg of alkyd 12 film-forming agent, and 5 kg of fungicide into the container in sequence; Step 5: Add 10 kg of alkali swelling thickener into the container and adjust the viscosity to 94-96 ku; Step 6: Color adjustment; Step 7: Unloading and packaging.

[0022] The coating obtained has smooth construction properties, but the paint film after coating formation has a rough appearance and no three-dimensional effect.

[0023] Example 2: Step 1: 205 kg of deionized water was added to a container; Step 2: Turn on the disperser and adjust the speed of the disperser to 475-525 r / min. Then, add 5 kg of hydrophobically modified cellulose, 6 kg of silicone defoamer, 20 kg of velvet thixotropic agent, 12 kg of polycarboxylate sodium salt dispersant, 2 kg of wetting agent, 10 kg of rutile titanium dioxide, and 400 kg of angular silica powder into the container in sequence. Step 3: Increase the speed of the disperser to 1450-1550 r / min, disperse at high speed for 45-55 minutes, and control the fineness of the semi-finished coating to ≤60 μm; Step 4: Adjust the speed of the disperser to 750-850 r / min, and add 300 kg of acrylic emulsion, 6 kg of pH regulator, 20 kg of propylene glycol, 20 kg of alkyd 12 film-forming agent, and 5 kg of fungicide into the container in sequence; Step 5: No need to add alkali swelling thickener; Step 6: Color adjustment; Step 7: Unloading and packaging.

[0024] The resulting paint cannot be sprayed.

[0025] Example 3: Step 1: 205 kg of deionized water was added to a container; Step 2: Turn on the disperser and adjust the speed of the disperser to 475-525 r / min. Then, add 5 kg of hydrophobically modified cellulose, 6 kg of silicone defoamer, 10 kg of velvet thixotropic agent, 12 kg of sodium polycarboxylate dispersant, 2 kg of wetting agent, 10 kg of rutile titanium dioxide, and 400 kg of spherical silica powder into the container in sequence; Step 3: Increase the speed of the disperser to 1450-1550 r / min, disperse at high speed for 45-55 minutes, and control the fineness of the semi-finished coating to ≤60 μm; Step 4: Adjust the speed of the disperser to 750-850 r / min, and add 300 kg of acrylic emulsion, 6 kg of pH regulator, 20 kg of propylene glycol, 20 kg of alkyd 12 film-forming agent, and 5 kg of fungicide into the container in sequence; Step 5: No need to add alkali swelling thickener; Step 6: Color adjustment; Step 7: Unloading and packaging.

[0026] The prepared coating has smooth construction properties, and the paint film after coating formation has a strong three-dimensional appearance and a good velvet surface.

[0027] Example 4: Step 1: 205 kg of deionized water was added to a container; Step 2: Turn on the disperser and adjust the speed of the disperser to 475-525 r / min. Then, add 5 kg of hydrophobically modified cellulose, 6 kg of silicone defoamer, 10 kg of velvet thixotropic agent, 12 kg of sodium polycarboxylate dispersant, 2 kg of wetting agent, 10 kg of rutile titanium dioxide, and 400 kg of angular silica powder into the container in sequence. Step 3: Increase the speed of the disperser to 1450-1550 r / min, disperse at high speed for 45-55 minutes, and control the fineness of the semi-finished coating to ≤60 μm; Step 4: Adjust the speed of the disperser to 750-850 r / min, and add 300 kg of acrylic emulsion, 6 kg of pH regulator, 20 kg of propylene glycol, 20 kg of alkyd 12 film-forming agent, and 5 kg of fungicide into the container in sequence; Step 5: No need to add alkali swelling thickener; Step 6: Color adjustment; Step 7: Unloading and packaging.

[0028] The prepared coating has smooth construction properties, and the paint film after coating formation has a strong three-dimensional appearance and a weak velvet surface.

[0029] Example 5: Step 1: 205 kg of deionized water was added to a container; Step 2: Turn on the disperser and adjust the speed of the disperser to 475-525 r / min. Then, add 5 kg of hydrophobically modified cellulose, 6 kg of silicone defoamer, 5 kg of velvet thixotropic agent, 12 kg of polycarboxylate sodium salt dispersant, 2 kg of wetting agent, 10 kg of rutile titanium dioxide, and 400 kg of spherical silica powder into the container in sequence; Step 3: Increase the speed of the disperser to 1450-1550 r / min, disperse at high speed for 45-55 minutes, and control the fineness of the semi-finished coating to ≤60 μm; Step 4: Adjust the speed of the disperser to 750-850 r / min, and add 300 kg of acrylic emulsion, 6 kg of pH regulator, 20 kg of propylene glycol, 20 kg of alkyd 12 film-forming agent, and 5 kg of fungicide into the container in sequence; Step 5: Add 5 kg of alkali swelling thickener into the container and adjust the viscosity to 94-96 ku; Step 6: Color adjustment; Step 7: Unloading and packaging.

[0030] The prepared coating has smooth construction properties, and the paint film after coating formation has a strong three-dimensional appearance and a good velvet surface.

[0031] Example 6: Step 1: 205 kg of deionized water was added to a container; Step 2: Turn on the disperser and adjust the speed of the disperser to 475-525 r / min. Then, add 5 kg of hydrophobically modified cellulose, 6 kg of silicone defoamer, 15 kg of velvet thixotropic agent, 12 kg of polycarboxylate sodium salt dispersant, 2 kg of wetting agent, 10 kg of rutile titanium dioxide, and 400 kg of spherical silica powder into the container in sequence; Step 3: Increase the speed of the disperser to 1450-1550 r / min, disperse at high speed for 45-55 minutes, and control the fineness of the semi-finished coating to ≤60 μm; Step 4: Adjust the speed of the disperser to 750-850 r / min, and add 300 kg of acrylic emulsion, 6 kg of pH regulator, 20 kg of propylene glycol, 20 kg of alkyd 12 film-forming agent, and 5 kg of fungicide into the container in sequence; Step 5: No need to add alkali swelling thickener; Step 6: Color adjustment; Step 7: Unloading and packaging.

[0032] The prepared coating can be sprayed by adding water, and the paint film after the coating is formed has a strong three-dimensional appearance and a strong velvet surface.

[0033] Example 7: Step 1: 205 kg of deionized water was added to a container; Step 2: Turn on the disperser and adjust the speed of the disperser to 475-525 r / min. Then, add 5 kg of hydrophobically modified cellulose, 6 kg of silicone defoamer, 7.5 kg of velvet thixotropic agent, 12 kg of polycarboxylate sodium salt dispersant, 2 kg of wetting agent, 10 kg of rutile titanium dioxide, and 400 kg of spherical silica powder into the container in sequence; Step 3: Increase the speed of the disperser to 1450-1550 r / min, disperse at high speed for 45-55 minutes, and control the fineness of the semi-finished coating to ≤60 μm; Step 4: Adjust the speed of the disperser to 750-850 r / min, and add 300 kg of acrylic emulsion, 6 kg of pH regulator, 20 kg of propylene glycol, 20 kg of alkyd 12 film-forming agent, and 5 kg of fungicide into the container in sequence; Step 5: Add 3 kg of alkali swelling thickener into the container and adjust the viscosity to 94-96 ku; Step 6: Color adjustment; Step 7: Unloading and packaging.

[0034] The prepared coating has smooth construction properties, and the paint film after coating formation has a strong three-dimensional appearance and a good velvet surface.

[0035] Example 8: Step 1: 205 kg of deionized water was added to a container; Step 2: Turn on the disperser and adjust the speed of the disperser to 475-525 r / min. Then, add 5 kg of hydrophobically modified cellulose, 6 kg of silicone defoamer, 12.5 kg of velvet thixotropic agent, 12 kg of sodium polycarboxylate dispersant, 2 kg of wetting agent, 10 kg of rutile titanium dioxide, and 400 kg of spherical silica powder into the container in sequence. Step 3: Increase the speed of the disperser to 1450-1550 r / min, disperse at high speed for 45-55 minutes, and control the fineness of the semi-finished coating to ≤60 μm; Step 4: Adjust the speed of the disperser to 750-850 r / min, and add 300 kg of acrylic emulsion, 6 kg of pH regulator, 20 kg of propylene glycol, 20 kg of alkyd 12 film-forming agent, and 5 kg of fungicide into the container in sequence; Step 5: Add 1 kg of alkali swelling thickener into the container and adjust the viscosity to 94-96 ku; Step 6: Color adjustment; Step 7: Unloading and packaging.

[0036] The prepared coating has smooth construction properties, and the paint film after coating formation has a strong three-dimensional appearance and a good velvet surface.

[0037] The material ratios and results of each embodiment are shown in the following table:

[0038] From the above examples, it can be seen that angular silica powder and 120-180 mesh quartz sand are not suitable for preparing sand velvet texture coatings; The materials prepared by the proportions of Examples 3, 5, 6, 7 and 8 can be sprayed, have a strong three-dimensional effect, and the plush texture meets the requirements.

[0039] The coatings prepared in Examples 3, 5, 6, 7, and 8 were tested according to GB / T9755-2014 "Synthetic Resin Emulsion Exterior Wall Coatings": The coating prepared in Example 3 had an initial viscosity of 107.1 ku, no lumps in the initial container, and was uniform after stirring. The viscosity after 28 days of hot storage was 121.7 ku, no lumps or stratification in the container after 28 days of hot storage, and was uniform after stirring. The washing resistance after 28 days of hot storage was greater than 10,000 times, the alkali resistance after 48 hours was normal, and the water resistance after 96 hours was normal. The coating was qualified.

[0040] The coating prepared in Example 5 had an initial viscosity of 94.7 ku, no lumps in the initial container, and was uniform after stirring. The viscosity after 28 days of hot storage was 101.4 ku, no lumps in the container after 28 days of hot storage, slight stratification, and was uniform after stirring. The washing resistance after 28 days of hot storage was greater than 10,000 times, the alkali resistance after 48 hours was normal, and the water resistance after 96 hours was normal. The coating was qualified.

[0041] The coating prepared in Example 6 had an initial viscosity of 139.8 ku. Initially, there were no lumps in the container and the coating was uniform after stirring. However, the viscosity after 28 days of hot storage could not be measured. The coating was agglomerated in the container after 28 days of hot storage and granular after stirring. The washability after 28 days of hot storage, the alkali resistance after 48 hours, and the water resistance after 96 hours could not be measured. The coating was unqualified.

[0042] The coating prepared in Example 7 had an initial viscosity of 100.7 ku, no lumps in the initial container, and was uniform after stirring. The viscosity after 28 days of hot storage was 117.9 ku, no lumps or stratification in the container after 28 days of hot storage, and was uniform after stirring. The washing resistance after 28 days of hot storage was greater than 10,000 times, the alkali resistance after 48 hours was normal, and the water resistance after 96 hours was normal. The coating was qualified.

[0043] The coating prepared in Example 8 had an initial viscosity of 124.4 ku, no lumps in the initial container, and was uniform after stirring. The viscosity after 28 days of hot storage was 140.9 ku, no lumps in the container after 28 days of hot storage, and granules after stirring. The washing resistance after 28 days of hot storage was greater than 10,000 times, the alkali resistance after 48 hours was normal, and the water resistance after 96 hours was normal. The coating was qualified.

[0044] The test results of Examples 3, 5, 6, 7, and 8 are shown in the following table:

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the scope of protection of the present invention.

Claims

1. A velvet texture paint, characterized by: The composition comprises the following components in parts by weight: 19.5-21.5 parts by weight of deionized water; 0.48-0.53 parts by weight of hydrophobically modified cellulose; 0.57-0.63 parts by weight of silicone defoamer; 0.5-1.5 parts by weight of sand fleece thixotropic agent; 1.1-1.3 parts by weight of a polycarboxylate sodium salt dispersant; Wetting agent 0.19-0.21 parts by weight; 0.95-1.05 parts by weight of rutile titanium dioxide; 38-42 parts by weight of spherical silicon powder; Acrylic emulsion 28.5-31.5 parts by weight; 0.57-0.63 parts by weight of pH regulator; 1.9-2.1 parts by weight of propylene glycol; 1.9-2.1 parts by weight of alkyd dodecyl film-forming agent; 0.48-0.53 parts by weight of fungicide; 0.1-0.5 parts by weight of alkali swelling thickener 2. The velvet texture paint according to claim 1, characterized in that: The deionized water is 20.5 parts by weight, the hydrophobically modified cellulose is 0.5 parts by weight, the silicone defoamer is 0.6 parts by weight, the velvet thixotropic agent is 0.5-1.5 parts by weight, the sodium polycarboxylate dispersant is 1.2 parts by weight, the wetting agent is 0.2 parts by weight, the rutile titanium dioxide is 1 part by weight, the spherical silicon powder is 40 parts by weight, the acrylic emulsion is 30 parts by weight, the pH value regulator is 0.57-0.63 parts by weight, the propylene glycol is 2 parts by weight, the alkyd dodecyl film-forming agent is 2 parts by weight, the bactericide is 0.5 parts by weight, and the alkali swelling thickener is 0.1-0.5 parts by weight.

3. A method for preparing a velvet textured paint, characterized in that: The following steps are involved: Step 1: Add 19.5-21.5 parts by weight of deionized water into a container; Step 2: Turn on the disperser and adjust the speed of the disperser to 475-525 r / min, then add 0.48-0.53 parts by weight of hydrophobically modified cellulose, 0.57-0.63 parts by weight of silicone defoamer, 0.5-1.5 parts by weight of velvet thixotropic agent, 1.1-1.3 parts by weight of polycarboxylate sodium salt dispersant, 0.19-0.21 parts by weight of wetting agent, 0.95-1.05 parts by weight of rutile titanium dioxide, and 38-42 parts by weight of spherical silica powder into the container in sequence; Step 3: Increase the speed of the disperser to 1450-1550 r / min and disperse at high speed for 45-55 minutes; Step 4: Adjust the speed of the disperser to 750-850 r / min, and add 28.5-31.5 parts by weight of acrylic emulsion, 0.57-0.63 parts by weight of pH regulator, 1.9-2.1 parts by weight of propylene glycol, 1.9-2.1 parts by weight of alkyd dodecyl film-forming agent, and 0.48-0.53 parts by weight of fungicide into the container in sequence; Step 5: Add 0.1-0.5 parts by weight of an alkali-swellable thickener into the container and adjust the viscosity to 94-96 ku; Step 6: Color adjustment; Step 7: Unloading and packaging.

4. The method for preparing a velvet textured paint according to claim 3, wherein: After step 3, the fineness of the semi-finished coating is controlled to be ≤60 μm.

5. A construction method for a velvet textured paint, characterized in that: The following steps are involved: Step 1: Set a putty layer on the base layer; Step 2: After the putty layer is completely dry, use a long-haired roller to apply 2-3 layers of the same color anti-alkali primer on the putty layer. The amount of primer is 8-10 m2 / kg. Step 3: After the same color anti-alkali primer layer is completely dry, use the W-77G spray gun to spray the sand velvet texture paint on the same color anti-alkali primer layer 1-2 times. The amount of sand velvet texture paint is 2-3 m2 / kg. Step 4: After the velvet texture paint is completely dry, use 240-400 grit white velvet sandpaper to polish the paint surface, remove uneven spots and clean up the dust; Step 5: Use a long-bristled roller to apply the matte topcoat 1-2 times.

6. The construction method of a velvet textured paint according to claim 5, characterized in that: In step 3, the spray gun pressure is 0.75-0.85 MPa.

Images