Reflective heat-insulation crystal colored stone paint and preparation method thereof

Abstract

The invention discloses reflective heat-insulating crystal colored stone paint and a preparation method thereof. The reflective heat-insulating crystal colored stone paint is prepared from the following raw materials in parts by weight: 10-15 parts of deionized water; 0.2 to 0.3 part of a hydrophobic modified dispersant; 0.1 part of a nonionic wetting agent without APEO (alkylphenol ethoxylates); 0.2 to 0.3 part of hydroxyethyl cellulose; 0.1 part of a thixotropic agent; 0.15 part of a multifunctional additive; 0.1 part of an emulsified mineral oil defoaming agent; 1 to 1.5 parts of ethylene glycol; 0.1 to 0.15 part of a Kathon sterilization preservative; 15 to 20 parts of silicon modified acrylate copolymer emulsion; 0.6-1 part of a coalescing agent; 0.2 to 0.3 part of a thickening agent; and 65-70 parts of 30-mesh to 40-mesh reflective insulation calcined sand. The reflective heat-insulating crystal colored stone paint produced by the invention can reflect sunlight to insulate solar energy and reduce the temperature of the outer wall surface and the indoor temperature, thereby achieving the purpose of reducing energy consumption.

Description

Technical Field

[0001] The invention belongs to the technical field of functional building exterior wall coatings, and particularly relates to a reflective heat-insulating crystal stone paint and a preparation method thereof. Background Art

[0002] With the rapid development of the construction industry and the growing energy crisis, people are becoming increasingly aware of exterior building coatings. The use of a reflective, heat-insulating crystal stone paint on building exteriors is crucial. The coating resists fading under strong UV rays and is age-resistant. It reflects sunlight, reducing heat buildup and preventing the surface from absorbing heat, which can cause indoor temperatures to rise. This reduces heat conduction into the room, achieving reflective insulation. Experimental data shows that this can effectively lower indoor temperatures by 10-15°C, reducing indoor cooling energy consumption and emissions, resulting in energy savings and a low carbon footprint.

[0003] However, the real stone paint currently used on the exterior walls of buildings does not have a reflective heat-insulating effect. Especially under strong ultraviolet rays, when sunlight directly hits the real stone paint wall, the heat is absorbed and the temperature of the wall paint surface rises. Over time, it is easy to cause the paint film to fade, age faster, and have a short service life. Summary of the Invention

[0004] In order to solve the technical problem of increased temperature of wall coating caused by sunlight exposure of building exterior wall coatings, the present invention provides a reflective heat-insulating crystal stone paint and a preparation method thereof, and the standards of reflective heat-insulating coatings are achieved by adding reflective heat-insulating calcined sand during the preparation process of the crystal stone paint.

[0005] The present invention adopts the following technical solution to solve the above technical problems, a reflective heat-insulating crystal stone paint, characterized in that it is prepared from the following raw materials in parts by weight: 10-15 parts of deionized water; 0.2-0.3 parts of a hydrophobically modified dispersant, wherein the hydrophobically modified dispersant is one or more of BASF Dow 4040A, San Nopco SN-2027, and Haichuan 2028; 0.1 part of an APEO-free nonionic wetting agent, wherein the APEO-free nonionic wetting agent is one or more of BASF 3189, Clariant 118, and Haichuan 3169; 0.2-0.3 parts of hydroxyethyl cellulose, which is one or more of Ashland HHBR250 and Luzhou HD-100,000; 0.1 part of thixotropic agent, which is magnesium aluminum silicate (Hemmings 600); 0.15 parts of a multifunctional additive, which is AMP-95 (Angus); 0.1 part of an emulsified mineral oil defoamer, which may be one or more of BASF 2157, San Nopco NXZ, and Haichuan F111; 1-1.5 parts of ethylene glycol; 0.1-0.15 parts of Kasong bactericidal preservative; 15-20 parts of silicon-modified acrylate copolymer emulsion, wherein the silicon-modified acrylate copolymer emulsion is silicon-modified acrylate copolymer emulsion HC-9097; 0.6-1 part of a film-forming aid, wherein the film-forming aid is one or more of Tianyin alcohol ester 12 and Eastman alcohol ester 12; 0.2-0.3 parts of thickener, which is one or more of BASF 1341 and Dow 8W; 65-70 parts of 30-40 mesh reflective insulating calcined sand.

[0006] Furthermore, the specific preparation steps of the silicon-modified acrylate copolymer emulsion are: Step S1: Add 17.7 kg of deionized water, 0.4 kg of emulsifier Cosp-1 (Solvay), 0.1 kg of emulsifier HC-436 (Solvay), and 0.5 kg of emulsifier HC-102 (Solvay) into an emulsifier kettle A equipped with a digital display. After stirring and mixing, add 0.6 kg of acrylamide, 0.06 kg of sodium bicarbonate, 20.3 kg of methyl methacrylate, 9.5 kg of butyl acrylate, 1.2 kg of methacrylic acid, 9.6 kg of isooctyl acrylate, and 0.9 kg of silicon monomer. Continue stirring and mixing until uniform, to obtain a pre-emulsion of monomer A. Add 5.5 kg of methyl methacrylate, 1.5 kg of methacrylic acid and 0.36 kg of silicon monomer into an emulsifier B equipped with a digital display, and stir and mix them evenly to obtain a monomer B pre-emulsion; Step S2: 17.7 kg of deionized water, 0.4 kg of emulsifier Cosp-1 (Solvay), and 0.67 kg of emulsifier HC-102 (Solvay) were added to a reactor equipped with a digital stirrer, a condenser, and a digital thermometer. The mixture was heated until completely dissolved. 3 kg of the pre-emulsion of monomer A was then added and stirred for uniform mixing. After that, a persulfate primary initiator was added at a concentration of 0.2% to 0.5% by weight of the total weight of the pre-emulsion of monomer A. The mixture was stirred for uniform mixing until the emulsion emitted a blue light and the mixture was then kept warm. Step S3, based on the seed emulsion polymerization obtained in step S2, monomer A pre-emulsion and 0.2%-0.5% of the total weight of the monomer A pre-emulsion as a persulfate initiator are first added dropwise at 85° C., the entire addition time is controlled to be 1.5-2 hours, the temperature is controlled to be 85-87° C., and after the addition is completed, the temperature is raised to 88° C. and kept warm for 30 minutes to obtain the core; Step S4: based on the core layer emulsion polymerization in step S3, the monomer B pre-emulsion and 0.2%-0.5% of the total weight of the monomer B pre-emulsion as a persulfate initiator are added dropwise. After the addition is complete, the temperature is raised to 88° C. and kept for 1.5 hours to obtain the shell, and then the temperature is lowered to 70° C. for standby use. Step S5: After the polymerization reaction in step S4 is completed, tert-butyl hydroperoxide or the like is added to eliminate residual monomers, and then a multifunctional additive AMP-95 (Angus) is added to blend the product to obtain a silicon-modified acrylate copolymer emulsion.

[0007] The silane-modified acrylate copolymer emulsion has the characteristics of high hardness, good weather resistance, low water permeability, anti-fouling, strong hydrophobicity after the emulsion forms a film, and a reflective heat-insulating crystal stone paint prepared therein has a lotus leaf effect.

[0008] The preparation method of the reflective heat-insulating crystal stone paint of the present invention is characterized by the following specific steps: Step S1, in a dispersing and stirring tank, start a stirring and dispersing machine, add 10-15 parts by weight of deionized water, 0.2-0.3 parts by weight of hydroxyethyl cellulose, and 0.1 parts by weight of a thixotropic agent at a low speed of 500-800 r / min, stir at a high speed of 1000-2000 r / min for 20 minutes until the mixture is evenly mixed and free of particles, and then add 0.15 parts by weight of a multifunctional additive, 0.2-0.3 parts by weight of a hydrophobically modified dispersant, 0.1 parts by weight of an APEO-free nonionic wetting agent, and 1-1.5 parts by weight of ethylene glycol; Step S2, stirring at a low speed of 500-800 r / min in the dispersion stirring tank of step S1 and adding 15-20 parts by weight of silicon-modified acrylate copolymer emulsion, 0.6-1 parts by weight of film-forming aid, 0.1 parts by weight of emulsified mineral oil defoamer, 0.1-0.15 parts by weight of Kathon bactericidal preservative, and 0.2-0.3 parts by weight of thickener; Step S3, adding 65-70 parts by weight of 30-40 mesh reflective insulation calcined sand into the dispersion stirring tank of step S2, stirring at 500-1000 r / min for 15 minutes to obtain the finished reflective insulation crystal stone paint after mixing evenly.

[0009] Compared with the prior art, the present invention has the following advantages and beneficial effects: the present invention produces reflective heat-insulating crystal stone paint, which has the functions of reflecting sunlight and insulating solar energy, reducing the temperature of the exterior wall surface and indoor temperature, thereby achieving the purpose of reducing energy consumption. DETAILED DESCRIPTION

[0010] The specific technical solutions of the present invention are described in detail with reference to specific embodiments. Example

[0011] Step S1: In a dispersing and stirring tank, start a stirring and dispersing machine, add 10 kg of deionized water, 0.3 kg of hydroxyethyl cellulose, and 0.1 kg of a thixotropic agent at a low speed of 500-800 r / min, stir at a high speed of 1000-2000 r / min for 20 minutes until the mixture is evenly mixed and free of particles, and then add 0.15 kg of a multifunctional additive, 0.2 kg of a hydrophobically modified dispersant, 0.1 kg of an APEO-free nonionic wetting agent, and 1.5 kg of ethylene glycol; Step S2: adding 15 kg of silicon-modified acrylate copolymer emulsion, 1 kg of film-forming aid, 0.1 kg of emulsified mineral oil defoamer, 0.15 kg of Kathon bactericidal preservative, and 0.3 kg of thickener into the dispersion stirring tank of step S1 under stirring at a low speed of 500-800 r / min; Step S3, add 70 kg of 30-40 mesh reflective insulation calcined sand into the dispersion stirring tank of step S2, stir at 500-1000 r / min for 15 minutes to obtain the finished reflective insulation crystal stone paint after mixing evenly.

[0012] Table 1 sample Water resistance 240h Solar reflectance Near-infrared reflectance Hemispherical emissivity Change rate of solar reflectance after artificial weathering % (600h) 1 (high brightness) No abnormalities 0.72 0.85 0.93 1 2 (medium brightness) No abnormalities 0.55 0.42 0.93 4 3 (low brightness) No abnormalities 0.28 0.42 0.93 4

[0013] After the finished product is completed, the reflective heat-insulating crystal stone paint of different brightness is tested for water resistance, solar reflectance and near-infrared reflectance, hemispherical emissivity, and the rate of change of solar reflectance after artificial climate aging.

[0014] Water resistance was tested according to GB / T1733-1993, "Test Method for Water Resistance of Paint Films." Solar reflectance, near-infrared reflectance, and hemispherical emissivity were tested according to JG / T235-2014, "Architectural Reflective Thermal Insulation Coatings." The test results are shown in Table 1.

[0015] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which fall within the scope of the present invention to be protected.

Claims

1. A reflective heat-insulating crystal stone paint, characterized in that It is prepared from the following raw materials in parts by weight: 10-15 parts of deionized water; 0.2-0.3 parts of a hydrophobically modified dispersant, wherein the hydrophobically modified dispersant is one or more of BASF Dow 4040A, San Nopco SN-2027, and Haichuan 2028; 0.1 part of an APEO-free nonionic wetting agent, wherein the APEO-free nonionic wetting agent is one or more of BASF 3189, Clariant 118, and Haichuan 3169; 0.2-0.3 parts of hydroxyethyl cellulose, which is one or more of Ashland HHBR250 and Luzhou HD-100,000; 0.1 part of thixotropic agent, which is magnesium aluminum silicate (Hemmings 600); 0.15 parts of a multifunctional additive, which is AMP-95 (Angus); 0.1 part of an emulsified mineral oil defoamer, which may be one or more of BASF 2157, San Nopco NXZ, and Haichuan F111; 1-1.5 parts of ethylene glycol; 0.1-0.15 parts of Kasong bactericidal preservative; 15-20 parts of silicon-modified acrylate copolymer emulsion, wherein the silicon-modified acrylate copolymer emulsion is silicon-modified acrylate copolymer emulsion HC-9097; 0.6-1 part of a film-forming aid, wherein the film-forming aid is one or more of Tianyin alcohol ester 12 and Eastman alcohol ester 12; 0.2-0.3 parts of thickener, which is one or more of BASF 1341 and Dow 8W; 65-70 parts of 30-40 mesh reflective insulating calcined sand.

2. A reflective heat-insulating crystal stone paint according to claim 1, characterized in that The specific preparation steps of the silicon-modified acrylate copolymer emulsion are: Step S1: Add 17.7 kg of deionized water, 0.4 kg of emulsifier Cosp-1 (Solvay), 0.1 kg of emulsifier HC-436 (Solvay), and 0.5 kg of emulsifier HC-102 (Solvay) into an emulsifier kettle A equipped with a digital display. After stirring and mixing, add 0.6 kg of acrylamide, 0.06 kg of sodium bicarbonate, 20.3 kg of methyl methacrylate, 9.5 kg of butyl acrylate, 1.2 kg of methacrylic acid, 9.6 kg of isooctyl acrylate, and 0.9 kg of silicon monomer. Continue stirring and mixing until uniform, to obtain a pre-emulsion of monomer A. Add 5.5 kg of methyl methacrylate, 1.5 kg of methacrylic acid and 0.36 kg of silicon monomer into an emulsifier B equipped with a digital display, and stir and mix them evenly to obtain a monomer B pre-emulsion; Step S2: 17.7 kg of deionized water, 0.4 kg of emulsifier Cosp-1 (Solvay), and 0.67 kg of emulsifier HC-102 (Solvay) were added to a reactor equipped with a digital stirrer, a condenser, and a digital thermometer. The mixture was heated until completely dissolved. 3 kg of the pre-emulsion of monomer A was then added and stirred for uniform mixing. After that, a persulfate primary initiator was added at a concentration of 0.2% to 0.5% by weight of the total weight of the pre-emulsion of monomer A. The mixture was stirred for uniform mixing until the emulsion emitted a blue light and the mixture was then kept warm. Step S3, based on the seed emulsion polymerization obtained in step S2, monomer A pre-emulsion and 0.2%-0.5% of the total weight of the monomer A pre-emulsion as a persulfate initiator are first added dropwise at 85° C., the entire addition time is controlled to be 1.5-2 hours, the temperature is controlled to be 85-87° C., and after the addition is completed, the temperature is raised to 88° C. and kept warm for 30 minutes to obtain the core; Step S4: based on the core layer emulsion polymerization in step S3, the monomer B pre-emulsion and 0.2%-0.5% of the total weight of the monomer B pre-emulsion as a persulfate initiator are added dropwise. After the addition is complete, the temperature is raised to 88° C. and kept for 1.5 hours to obtain the shell, and then the temperature is lowered to 70° C. for standby use. Step S5: After the polymerization reaction in step S4 is completed, tert-butyl hydroperoxide or the like is added to eliminate residual monomers, and then a multifunctional additive AMP-95 (Angus) is added to blend the product to obtain a silicon-modified acrylate copolymer emulsion.

3. The silane-modified acrylic copolymer emulsion has the characteristics of high hardness, good weather resistance, low water permeability, anti-fouling, strong hydrophobicity after emulsion film formation, and a reflective heat-insulating crystal stone paint with a lotus leaf effect.

4. A method for preparing the reflective heat-insulating crystal stone paint according to claim 1 or 2, characterized in that The specific steps are: Step S1, in a dispersing and stirring tank, start a stirring and dispersing machine, add 10-15 parts by weight of deionized water, 0.2-0.3 parts by weight of hydroxyethyl cellulose, and 0.1 parts by weight of a thixotropic agent at a low speed of 500-800 r / min, stir at a high speed of 1000-2000 r / min for 20 minutes until the mixture is evenly mixed and free of particles, and then add 0.15 parts by weight of a multifunctional additive, 0.2-0.3 parts by weight of a hydrophobically modified dispersant, 0.1 parts by weight of an APEO-free nonionic wetting agent, and 1-1.5 parts by weight of ethylene glycol; Step S2, stirring at a low speed of 500-800 r / min in the dispersion stirring tank of step S1 and adding 15-20 parts by weight of silicon-modified acrylate copolymer emulsion, 0.6-1 parts by weight of film-forming aid, 0.1 parts by weight of emulsified mineral oil defoamer, 0.1-0.15 parts by weight of Kathon bactericidal preservative, and 0.2-0.3 parts by weight of thickener; Step S3, adding 65-70 parts by weight of 30-40 mesh reflective insulation calcined sand into the dispersion stirring tank of step S2, stirring at 500-1000 r / min for 15 minutes to obtain the finished reflective insulation crystal stone paint after mixing evenly.