A method of formulating an architectural coating

Abstract

The application discloses a kind of configuration methods of building coating, comprising the following steps: raw material preparation: base material, auxiliary agent, filler and fungicide: base material: select the solid content as 45% ‑ 55%, glass transition temperature is 20 ‑ 30 ℃ water-based acrylic emulsion as base material;Pigment: select rutile titanium dioxide, talcum powder and calcined kaolin as pigment, wherein rutile titanium dioxide mass ratio is 20% ‑ 30%;Auxiliary agent: select anionic sodium salt dispersing agent, silicone defoaming agent or mineral oil defoaming agent, HEC hydroxyethyl cellulose or associated thickening agent, alcohol fat twelve as film-forming auxiliary agent.The application discloses a kind of configuration methods of building coating, the application is by isothiazolinone and nine Li Xiang ketone according to specific proportion composition fungicide, can effectively inhibit the growth of bacteria and mould, greatly prolongs the service life of coating, reduces the wall surface mildew, discoloration and other problems caused by mould breeding.

Description

Technical Field

[0001] This invention relates to the field of architectural coatings technology, and in particular to a method for preparing architectural coatings. Background Technology

[0002] Architectural coatings play a vital role in building decoration and protection. They not only give buildings an aesthetically pleasing appearance but also protect them and extend their service life. As people's requirements for building quality and environmental protection continue to increase, higher demands are being placed on the performance of architectural coatings, such as good weather resistance, water resistance, antibacterial and mildew-proof properties, and excellent application performance.

[0003] Existing architectural coating formulation methods have limitations in several aspects and cannot simultaneously meet the stringent requirements in terms of sterilization and mildew prevention, pigment dispersion uniformity, coating fineness and purity, and overall performance. Summary of the Invention

[0004] In view of the above-mentioned shortcomings in the prior art, the present invention provides a method for preparing architectural coatings, the purpose of which is to solve the problems of not being able to simultaneously meet the strict requirements in terms of sterilization and mildew prevention, pigment dispersion uniformity, coating fineness and purity, and comprehensive performance.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: a method for preparing architectural coatings, comprising the following steps: raw material preparation: base material, additives, fillers, and bactericides and fungicides: Base material: A water-based acrylic emulsion with a solid content of 45% - 55% and a glass transition temperature of 20 - 30℃ is selected as the base material; Pigments: Rutile titanium dioxide, talc, and calcined kaolin are selected as pigments, with rutile titanium dioxide accounting for 20%-30% by mass, talc accounting for 10%-15% by mass, and calcined kaolin accounting for 5%-10% by mass. Additives: Anionic sodium salt dispersant, organosilicon defoamer or mineral oil defoamer, HEC hydroxyethyl cellulose or associative thickener, and alcohol ester dodecyl are selected as film-forming aids; Filler: Select one or more of calcined kaolin, precipitated barium sulfate, wollastonite and heavy calcium carbonate; Bactericide and antifungal agent: composed of isothiazolinone and muscardine ketone, with a mass ratio of isothiazolinone to muscardine ketone of 1-5:30-1; The components, by weight, are: 25-60 parts of water-based acrylic emulsion, 1.5-2.5 parts of film-forming aid, 0.25-0.7 parts of bactericide and mildew inhibitor, 25-30 parts of filler, 10-20 parts of pigment, 0.2-0.8 parts of thickener, 0.3-0.7 parts of dispersant, 0.1-0.5 parts of defoamer, and 30-38 parts of deionized water.

[0006] Furthermore, the pre-dispersion step is as follows: the aqueous acrylic emulsion is added to a reaction vessel equipped with a stirring device and the temperature is controlled at 25-35°C. Under the condition of stirring speed of 300-500 r / min, the dispersant is slowly added and stirred for 10-15 min to allow the dispersant to be fully dissolved in the emulsion.

[0007] Furthermore, the pigment addition step is as follows: rutile titanium dioxide, talc powder and calcined kaolin are added to the reaction vessel in sequence, with an interval of 3-5 minutes between each pigment addition; the stirring speed is increased to 800-1000 r / min and stirred for 20-30 minutes to ensure that the pigment is evenly dispersed in the emulsion to form a pre-dispersed slurry.

[0008] Furthermore, the grinding step is as follows: the pre-dispersed slurry is ground by a sand mill, the particle size of the grinding media is controlled to be 0.5-1.0 mm, the grinding time is 30-40 min, and the feeding speed of the sand mill is controlled to be 50-100 kg / h, so that the fineness of the slurry reaches 30-50 μm.

[0009] Furthermore, the additive addition step is as follows: defoamer, thickener and film-forming aid are added sequentially to the ground slurry. The amount of defoamer added is 0.1% - 0.3% of the total mass of the coating, the amount of thickener added is 0.2% - 0.5% of the total mass of the coating, and the amount of film-forming aid added is 2% - 5% of the total mass of the coating. The stirring speed is reduced to 500 - 700 r / min and stirred for 15 - 20 min to make the additives evenly dispersed in the slurry.

[0010] Furthermore, the paint mixing step is as follows: according to the required color and performance requirements of the paint, add an appropriate amount of color paste for color mixing. The amount of color paste added is adjusted according to the required depth of color. Stir for 5-10 minutes after each addition of color paste to make the color uniform. At the same time, check the viscosity of the paste and adjust the viscosity to 80-100KU by adding an appropriate amount of water.

[0011] Furthermore, the filtration step is as follows: the mixed paint is filtered through a 200-300 mesh filter, using a double-layer filter, with the upper filter being 300 mesh and the lower filter being 200 mesh, to remove impurities and particles and ensure the purity and fineness of the paint.

[0012] Furthermore, the filtered coating is sealed in plastic buckets to prevent contamination and deterioration during storage and transportation.

[0013] The beneficial effects of this invention are as follows: 1. A method for preparing a building coating according to the present invention. The present invention uses a bactericide and antifungal agent composed of isothiazolinone and Murraya paniculata ketone in a specific ratio, which can effectively inhibit the growth of bacteria and mold, greatly extend the service life of the coating, and reduce problems such as mold and discoloration of the wall surface caused by mold growth.

[0014] 2. A method for preparing a building coating according to the present invention, through specific pre-dispersion, pigment addition and grinding steps, enables the pigment to be uniformly dispersed in the emulsion, and the fineness of the pre-dispersed slurry reaches 30-50μm, which ensures the uniformity of the coating color and the hiding power, so that the wall surface after painting is uniform and beautiful.

[0015] 3. A method for preparing a building coating according to the present invention. The building coating prepared by the present invention has good weather resistance, water resistance, and workability. Water-based acrylic emulsion, as a base material, provides the coating with good flexibility and film-forming properties. The rational combination of various fillers and additives further improves the coating's hardness, abrasion resistance, and weather resistance, meeting the usage requirements of buildings under different environmental conditions. The use of a double-layer filter effectively removes impurities and particles from the coating, ensuring its purity and fineness, resulting in a smoother and more even wall surface after application and improving the decorative effect. Attached Figure Description

[0016] Figure 1 This is a process flow diagram of a method for preparing a building coating according to the present invention; Detailed Implementation

[0017] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals.

[0018] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0019] To make the content of this invention easier to understand, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] like Figure 1 As shown, a method for preparing an architectural coating includes the following steps: Raw material preparation: base material, additives, fillers, and bactericides and fungicides: Base material: A water-based acrylic emulsion with a solid content of 45%-55% and a glass transition temperature of 20-30℃ is selected as the base material. It has good film-forming properties, water resistance, and weather resistance. Moreover, it uses water as the dispersion medium and has excellent environmental performance. This solid content and glass transition temperature range can ensure that the emulsion forms a good film structure in the coating and improve the coating performance. Pigments: Rutile titanium dioxide, talc, and calcined kaolin are selected as pigments, with rutile titanium dioxide accounting for 20%-30% by mass, talc accounting for 10%-15% by mass, and calcined kaolin accounting for 5%-10% by mass. Rutile titanium dioxide has excellent hiding power and whiteness, which can improve the decorative properties of the coating; talc and calcined kaolin can increase the filling power and hardness of the coating, and improve its workability and scrub resistance. Additives: Anionic sodium salt dispersants, silicone defoamers or mineral oil defoamers, HEC hydroxyethyl cellulose or associative thickeners, and alcohol ester dodecyl are selected as film-forming aids. Dispersants can effectively disperse pigment particles, prevent agglomeration, and improve coating stability; defoamers can quickly eliminate bubbles during the preparation process and avoid defects such as surface pinholes; thickeners can adjust the viscosity of the coating, improve leveling and workability; film-forming aids can lower the minimum film-forming temperature of water-based acrylic emulsions, promote the formation of a continuous film of emulsion particles on the substrate surface, and improve adhesion. Filler: Select one or more of calcined kaolin, precipitated barium sulfate, wollastonite and heavy calcium carbonate; Bactericide and antifungal agent: composed of isothiazolinone and muscardine ketone, with a mass ratio of isothiazolinone to muscardine ketone of 1-5:30-1; The components, by weight, are: 25-60 parts of water-based acrylic emulsion, 1.5-2.5 parts of film-forming aid, 0.25-0.7 parts of bactericide and mildew inhibitor, 25-30 parts of filler, 10-20 parts of pigment, 0.2-0.8 parts of thickener, 0.3-0.7 parts of dispersant, 0.1-0.5 parts of defoamer, and 30-38 parts of deionized water.

[0021] The pre-dispersion step is as follows: Add the aqueous acrylic emulsion to a reactor equipped with a stirrer and the temperature is controlled at 25-35℃. Under the condition of stirring speed of 300-500r / min, slowly add the dispersant and stir for 10-15min to allow the dispersant to fully dissolve in the emulsion. Controlling the reactor temperature within this range can ensure the stability of the emulsion and the dissolution effect of the dispersant, and avoid the temperature affecting the effect of the dispersant.

[0022] The pigment addition steps are as follows: rutile titanium dioxide, talc, and calcined kaolin are added to the reactor in sequence. After each pigment is added, the next pigment is added after an interval of 3-5 minutes. The stirring speed is increased to 800-1000 r / min and stirred for 20-30 minutes to ensure that the pigments are evenly dispersed in the emulsion and form a pre-dispersed slurry. The intermittent addition of pigments and the control of stirring speed and time can ensure that each pigment is fully dispersed, avoid mutual interference, and improve the quality of the pre-dispersed slurry.

[0023] The grinding steps are as follows: the pre-dispersed slurry is ground through a sand mill, the particle size of the grinding media is controlled to be 0.5-1.0 mm, the grinding time is 30-40 min, and the feed speed of the sand mill is controlled at 50-100 kg / h, so that the fineness of the slurry reaches 30-50 μm. The appropriate particle size of the grinding media, the grinding time, and the feed speed can ensure that the pigment particles in the slurry are fully ground to achieve the required fineness, thereby improving the hiding power and gloss of the coating.

[0024] The steps for adding additives are as follows: Add defoamer, thickener, and film-forming aid to the ground slurry in sequence. The amount of defoamer added is 0.1% - 0.3% of the total mass of the coating, the amount of thickener added is 0.2% - 0.5% of the total mass of the coating, and the amount of film-forming aid added is 2% - 5% of the total mass of the coating. Reduce the stirring speed to 500 - 700 r / min and stir for 15 - 20 min to ensure that the additives are evenly dispersed in the slurry. Precisely controlling the amount of additives added can give full play to the role of the additives, improve the performance of the coating, and avoid affecting the quality of the coating due to adding too much or too little.

[0025] The paint mixing steps are as follows: According to the required color and performance requirements of the paint, add an appropriate amount of color paste to adjust the color. The amount of color paste added is adjusted according to the desired depth of color. Stir for 5-10 minutes after each addition of color paste to make the color uniform. At the same time, check the viscosity of the paste and adjust the viscosity to 80-100KU by adding an appropriate amount of water. Precise control of viscosity can ensure the leveling and adhesion of the paint during construction and avoid problems such as sagging or excessive coating thickness.

[0026] The filtration process is as follows: the mixed paint is filtered through a 200-300 mesh filter, using a double-layer filter with a 300 mesh upper layer and a 200 mesh lower layer to remove impurities and particles, ensuring the purity and fineness of the paint.

[0027] The filtered paint is sealed in plastic buckets to prevent contamination and deterioration during storage and transportation.

[0028] Embodiment 1 of this invention patent: Raw material preparation Base material: 40 parts of water-based acrylic emulsion with a solid content of 50% and a glass transition temperature of 25℃.

[0029] Pigment: 12 parts rutile titanium dioxide, 5 parts talc, and 3 parts calcined kaolin.

[0030] Additives: 0.5 parts anionic sodium salt dispersant, 0.3 parts silicone defoamer, 0.5 parts HEC hydroxyethyl cellulose, and 2 parts alcohol ester dodecyl film-forming aid.

[0031] Filler: 10 parts calcined kaolin and 10 parts precipitated barium sulfate.

[0032] Bactericide and antifungal agent: 0.1 parts isothiazolinone and 0.3 parts Murraya paniculata ketone.

[0033] 35 portions of deionized water.

[0034] Pre-dispersion step: Add 40 parts of aqueous acrylic emulsion to a reactor equipped with a stirrer and the temperature is controlled at 30°C. Under the condition of stirring speed of 400 r / min, slowly add 0.5 parts of dispersant and stir for 12 min to allow the dispersant to be fully dissolved in the emulsion.

[0035] Pigment addition steps: Add 12 parts of rutile titanium dioxide, 5 parts of talc powder and 3 parts of calcined kaolin to the reactor in sequence. After each pigment is added, wait 4 minutes before adding the next pigment. Increase the stirring speed to 900 r / min and stir for 25 minutes to make the pigment evenly dispersed in the emulsion to form a pre-dispersed slurry.

[0036] Grinding steps: Grind the pre-dispersed slurry through a sand mill, controlling the particle size of the grinding media to be 0.8 mm, the grinding time to be 35 min, and the feed speed of the sand mill to be controlled at 70 kg / h, so that the fineness of the slurry reaches 40 μm.

[0037] Additive addition steps: Add 0.3 parts of defoamer (0.2% of the total mass of the coating), 0.5 parts of thickener (0.3% of the total mass of the coating), and 2 parts of film-forming aid (3% of the total mass of the coating) to the ground slurry in sequence. Reduce the stirring speed to 600 r / min and stir for 18 min to ensure that the additives are evenly dispersed in the slurry.

[0038] Paint mixing steps: Add an appropriate amount of colorant to the desired color and stir for 7 minutes after each addition to ensure uniform color; at the same time, check the viscosity of the paste and adjust the viscosity to 90KU by adding an appropriate amount of deionized water.

[0039] Filtration steps: The mixed paint is filtered through a double-layer filter with an upper 300 mesh and a lower 200 mesh to remove impurities and particles.

[0040] Packaging steps: Seal the filtered paint in a plastic bucket.

[0041] Embodiment 2 of this invention patent: Raw material preparation Base material: 30 parts of water-based acrylic emulsion with a solid content of 45% and a glass transition temperature of 20℃.

[0042] Pigment: 10 parts rutile titanium dioxide, 4 parts talc, and 2 parts calcined kaolin.

[0043] Additives: 0.4 parts anionic sodium salt dispersant, 0.2 parts mineral oil defoamer, 0.4 parts associative thickener, and 1.8 parts alcohol ester film-forming aid.

[0044] Filler: 15 parts wollastonite and 10 parts heavy calcium carbonate.

[0045] Bactericide and antifungal agent: 0.15 parts of isothiazolinone and 0.25 parts of Murraya paniculata ketone.

[0046] 32 portions of deionized water.

[0047] Pre-dispersion step: Add 30 parts of aqueous acrylic emulsion to a reactor equipped with a stirrer and the temperature is controlled at 28°C. Under the condition of stirring speed of 350 r / min, slowly add 0.4 parts of dispersant and stir for 13 min to allow the dispersant to be fully dissolved in the emulsion.

[0048] Pigment addition steps: Add 10 parts of rutile titanium dioxide, 4 parts of talc powder and 2 parts of calcined kaolin to the reactor in sequence. After each pigment is added, wait 3 minutes before adding the next pigment. Increase the stirring speed to 850 r / min and stir for 28 minutes to make the pigments evenly dispersed in the emulsion to form a pre-dispersed slurry.

[0049] Grinding steps: Grind the pre-dispersed slurry through a sand mill, controlling the particle size of the grinding media to be 0.6 mm, the grinding time to be 38 min, and the feed rate of the sand mill to be controlled at 60 kg / h, so that the fineness of the slurry reaches 35 μm.

[0050] Additive addition steps: Add 0.2 parts of defoamer (0.18% of the total mass of the coating), 0.4 parts of thickener (0.35% of the total mass of the coating), and 1.8 parts of film-forming aid (2.8% of the total mass of the coating) to the ground slurry in sequence. Reduce the stirring speed to 550 r / min and stir for 19 min to ensure that the additives are evenly dispersed in the slurry.

[0051] Paint mixing steps: Add an appropriate amount of colorant to the desired color and stir for 8 minutes after each addition of colorant to ensure uniform color; at the same time, check the viscosity of the paste and adjust the viscosity to 85KU by adding an appropriate amount of deionized water.

[0052] Filtration steps: The mixed paint is filtered through a double-layer filter with an upper 300 mesh and a lower 200 mesh to remove impurities and particles.

[0053] Packaging steps: Seal the filtered paint in a plastic bucket.

[0054] As can be seen from the above embodiments, the coating prepared according to the architectural coating formulation method of the present invention exhibits excellent performance in terms of bactericidal and mildew-proof properties, pigment dispersion uniformity, comprehensive performance, purity, and fineness, and can meet the market demand for high-performance architectural coatings.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing architectural coatings, characterized in that, Includes the following steps: Raw material preparation: base material, additives, fillers, and bactericides and fungicides: Base material: A water-based acrylic emulsion with a solid content of 45% - 55% and a glass transition temperature of 20 - 30℃ is selected as the base material; Pigments: Rutile titanium dioxide, talc, and calcined kaolin were selected as pigments, with rutile titanium dioxide accounting for 20%-30% by mass, talc accounting for 10%-15% by mass, and calcined kaolin accounting for 5%-10% by mass. Additives: Anionic sodium salt dispersant, organosilicon defoamer or mineral oil defoamer, HEC hydroxyethyl cellulose or associative thickener, and alcohol ester dodecyl are selected as film-forming aids; Filler: Select one or more of calcined kaolin, precipitated barium sulfate, wollastonite and heavy calcium carbonate; Bactericide and antifungal agent: composed of isothiazolinone and muscatone, with a mass ratio of isothiazolinone to muscatone of 1-5:30-1; The components, by weight, are: 25-60 parts of water-based acrylic emulsion, 1.5-2.5 parts of film-forming aid, 0.25-0.7 parts of bactericide and mildew inhibitor, 25-30 parts of filler, 10-20 parts of pigment, 0.2-0.8 parts of thickener, 0.3-0.7 parts of dispersant, 0.1-0.5 parts of defoamer, and 30-38 parts of deionized water.

2. The method for preparing a building coating according to claim 1, characterized in that: The pre-dispersion step is as follows: add the aqueous acrylic emulsion to a reaction vessel equipped with a stirring device and the temperature is controlled at 25-35℃, and slowly add the dispersant while stirring at a speed of 300-500 r / min. Stir for 10-15 min to allow the dispersant to fully dissolve in the emulsion.

3. The method for preparing a building coating according to claim 1, characterized in that: The pigment addition steps are as follows: rutile titanium dioxide, talc powder and calcined kaolin are added to the reaction vessel in sequence. After each pigment is added, the next pigment is added after an interval of 3-5 minutes. The stirring speed is increased to 800-1000 r / min and stirred for 20-30 minutes to make the pigment uniformly dispersed in the emulsion and form a pre-dispersed slurry.

4. The method for preparing a building coating according to claim 3, characterized in that: The grinding step is as follows: the pre-dispersed slurry is ground by a sand mill, the particle size of the grinding media is controlled to be 0.5-1.0 mm, the grinding time is 30-40 min, the feeding speed of the sand mill is controlled to be 50-100 kg / h, so that the fineness of the slurry reaches 30-50 μm.

5. The method for preparing a building coating according to claim 4, characterized in that: The additive addition steps are as follows: defoamer, thickener and film-forming aid are added sequentially to the ground slurry. The amount of defoamer added is 0.1% - 0.3% of the total mass of the coating, the amount of thickener added is 0.2% - 0.5% of the total mass of the coating, and the amount of film-forming aid added is 2% - 5% of the total mass of the coating. The stirring speed is reduced to 500 - 700 r / min and stirred for 15 - 20 min to make the additives evenly dispersed in the slurry.

6. The method for preparing a building coating according to claim 5, characterized in that: The paint mixing steps are as follows: according to the required color and performance requirements of the paint, add an appropriate amount of color paste to adjust the color. The amount of color paste added is adjusted according to the desired depth of color. Stir for 5-10 minutes after each addition of color paste to make the color uniform. At the same time, check the viscosity of the paste and adjust the viscosity to 80-100KU by adding an appropriate amount of water.

7. The method for preparing a building coating according to claim 6, characterized in that: The filtration step is as follows: the mixed paint is filtered through a 200-300 mesh filter, using a double-layer filter, with the upper filter being 300 mesh and the lower filter being 200 mesh, to remove impurities and particles and ensure the purity and fineness of the paint.

8. The method for preparing a building coating according to claim 7, characterized in that: The filtered paint is sealed in plastic buckets to prevent contamination and deterioration during storage and transportation.

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