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CN-122011857-A - Heat-insulating water-based colorful exterior wall coating and preparation method thereof

CN122011857ACN 122011857 ACN122011857 ACN 122011857ACN-122011857-A

Abstract

The invention relates to the technical field of building coating, in particular to a heat-insulating water-based colorful exterior wall coating and a preparation method thereof, wherein the heat-insulating water-based colorful exterior wall coating is prepared from the following raw materials, by weight, 15-25 parts of water-based film-forming emulsion, 10-18 parts of nano silicon dioxide aerogel, 6-12 parts of ceramic far infrared powder, 7-10 parts of hollow silicon dioxide glass microsphere, 18 parts of hydroxypropyl starch, 3 parts of glycerol, 5 parts of phthalocyanine blue, 1.5 parts of polycarboxylic acid sodium salt dispersing agent, 0.8 part of fatty acid polyoxyethylene ether wetting agent, 0.6 part of organic silicon defoaming agent, 0.8-1.8 part of thickening agent, 0.8-1.5 part of silane coupling agent KH560, 3-5 parts of film-forming auxiliary agent, 12 parts of talcum powder and 18-20 parts of deionized water. The heat-insulating water-based colorful exterior wall coating and the preparation method thereof provided by the invention effectively solve a plurality of inherent technical defects in the prior art, realize the remarkable improvement of the comprehensive performance of the product, and have outstanding substantive characteristics and remarkable progress.

Inventors

  • TANG SHAN
  • ZHU GUANGHONG
  • XIA DEMING
  • ZHU GUANGPING

Assignees

  • 天长市杜邦涂料有限公司

Dates

Publication Date
20260512
Application Date
20260309

Claims (9)

  1. 1. The heat-insulating water-based colorful exterior wall coating is characterized by being prepared from the following raw materials, by weight, 15-25 parts of a water-based film-forming emulsion, 10-18 parts of nano silicon dioxide aerogel, 6-12 parts of ceramic far infrared powder, 7-10 parts of hollow silicon dioxide glass microspheres, 18 parts of hydroxypropyl starch, 3 parts of glycerin, 5 parts of phthalocyanine blue, 1.5 parts of a polycarboxylate sodium salt dispersing agent, 0.8 part of a fatty acid polyoxyethylene ether wetting agent, 0.6 part of an organosilicon antifoaming agent, 0.8-1.8 parts of a thickening agent, 0.8-1.5 parts of a silane coupling agent KH560, 3-5 parts of a film-forming auxiliary agent, 12 parts of talcum powder and 18-20 parts of deionized water, wherein the water-based film-forming emulsion is a water-based acrylate emulsion or a compound of the water-based acrylate emulsion and the water-based polyurethane emulsion.
  2. 2. The heat-insulating water-based colorful outer wall paint as claimed in claim 1, wherein the thickener is hydroxyethyl cellulose or a compound of hydroxyethyl cellulose and polyurethane associative thickener, and the film forming auxiliary agent is propylene glycol methyl ether acetate or a compound of propylene glycol methyl ether acetate and dodecyl alcohol ester.
  3. 3. The method for preparing the heat-insulating water-based multicolor exterior wall coating as claimed in claim 1, which is characterized by comprising the following steps: (1) Mixing nano silicon dioxide aerogel and a silane coupling agent KH560 by adopting a high-speed mechanical stirrer, stirring at a rotating speed of 500 revolutions per minute to prepare modified nano aerogel, mixing hydroxypropyl starch, glycerol and phthalocyanine blue by adopting a double-screw extruder, plasticizing and extruding at 120 ℃ and 80 revolutions per minute, and crushing and sieving by adopting a high-speed crusher after extruding to obtain colorful particles; (2) Adding a polycarboxylic acid sodium salt dispersing agent and a fatty acid polyoxyethylene ether wetting agent into deionized water by adopting a high-speed dispersing machine, stirring at 800 revolutions per minute until the polycarboxylic acid sodium salt dispersing agent and the fatty acid polyoxyethylene ether wetting agent are completely dissolved, sequentially adding talcum powder, modified nano aerogel and ceramic far infrared powder, heating to 40 ℃ for dispersion treatment, then adding aqueous film-forming emulsion and film-forming auxiliary agent, stirring at 600 revolutions per minute until the system is uniform and layering-free, and finally adding an organosilicon defoaming agent and a thickening agent to adjust the viscosity to 80KU to prepare the base material; (3) And (3) composite molding, namely adding hollow silica glass beads and colorful particles into the base material by adopting a low-speed stirrer, stirring at a low speed at 300 revolutions per minute until the mixture is uniform and free of aggregation, standing and defoaming until the system has no obvious bubbles, and obtaining the heat-insulating water-based colorful outer wall coating.
  4. 4. The method according to claim 3, wherein in the step (1), the nano silica aerogel and the silane coupling agent KH560 are mixed and stirred at 60 to 70 ℃ for 60 to 90 minutes.
  5. 5. A method according to claim 3, wherein in step (1), the colorful particles are screened through a 100 to 200 mesh screen to obtain colorful particles with corresponding particle diameters.
  6. 6. The method according to claim 3, wherein in the step (2), the dispersion treatment speed of the talcum powder, the modified nano aerogel and the ceramic far infrared powder is 1200 to 1500rpm, the dispersion time is 25 to 40 minutes, and the dispersion is carried out until the system has no obvious particles and the particle size is less than or equal to 5 microns.
  7. 7. The method according to claim 3, wherein in the step (2), when the aqueous film-forming emulsion is a complex of the aqueous acrylic ester emulsion and the aqueous polyurethane emulsion, the aqueous acrylic ester emulsion is added first and stirred for 20 minutes at 600 rpm, and then the aqueous polyurethane emulsion is added and stirred for 15 minutes until the system is uniform and has no delamination.
  8. 8. The method according to claim 3, wherein in the step (3), the hollow silica glass beads are added into the base material in a stepwise feeding mode, and the mixture is stirred for 10 minutes, and then the colorful particles are added and stirred for 15 minutes until the mixture is uniform and free of agglomeration.
  9. 9. The method of claim 3, wherein in the step (3), the time for standing and defoaming is 20 to 30 minutes.

Description

Heat-insulating water-based colorful exterior wall coating and preparation method thereof Technical Field The invention relates to the technical field of building coatings, in particular to a heat-insulating water-based colorful exterior wall coating and a preparation method thereof. Background As the building energy-saving and decoration important materials, the water-based exterior wall coating with heat insulation and heat preservation performance and multicolor decoration effect becomes a market development trend due to the environmental protection and beautiful advantages along with the continuous improvement of the requirements of the building industry on energy saving, consumption reduction and appearance decoration, but the existing water-based multicolor exterior wall heat insulation and preservation coating still has a plurality of technical defects, and is difficult to meet the actual application requirements. The heat insulation mechanism of the existing product is mostly in a single form, no multi-mechanism synergistic effect exists, the heat insulation efficiency is low, and the heat insulation mechanism cannot adapt to the high energy-saving standard of modern buildings. The nanometer heat-insulating powder is easy to generate agglomeration phenomenon in application, has poor compatibility with a film forming system, and cannot be uniformly dispersed by a conventional dispersion process, so that the heat-insulating performance of the coating is greatly attenuated. The film forming emulsion is of a single type, and has inherent contradiction between film forming property and weather resistance, so that the film forming emulsion is difficult to consider, and the problems of ageing, color change and the like are easy to occur when the film forming emulsion is used outdoors for a long time due to insufficient adhesive force of a coating. The preparation and the composite process of the colorful particles are unreasonable in design, the colorful particles are easy to damage and bleed, agglomeration is easy to occur in the storage process, layering is easy to occur when the heat insulation filler is mixed with the colorful particles due to density difference, and the problem of bubble residue in the process is also more remarkable. In addition, most of the prior art is simple superposition of a single heat insulation technology and a multicolor technology, organic synergy is not formed, contradiction among heat insulation efficiency, decoration stability and physical and chemical properties cannot be solved at the same time, the comprehensive performance of products is poor, meanwhile, the suitability of technological parameters is poor, and the repeatability of industrial production and the performance stability of practical use are difficult to consider. Disclosure of Invention The invention aims at providing a heat-insulating water-based colorful exterior wall coating and a preparation method thereof. The invention further aims to provide a heat-insulating water-based colorful exterior wall coating, which is prepared from the following raw materials, by weight, 15-25 parts of a water-based film-forming emulsion, 10-18 parts of nano silicon dioxide aerogel, 6-12 parts of ceramic far infrared powder, 7-10 parts of hollow silicon dioxide glass beads, 18 parts of hydroxypropyl starch, 3 parts of glycerol, 5 parts of phthalocyanine blue, 1.5 parts of a polycarboxylate sodium salt dispersing agent, 0.8 part of a fatty acid polyoxyethylene ether wetting agent, 0.6 part of an organosilicon antifoaming agent, 0.8-1.8 parts of a thickening agent, 0.8-1.5 parts of a silane coupling agent KH560, 3-5 parts of a film-forming auxiliary agent, 12 parts of talcum powder and 18-20 parts of deionized water, wherein the water-based film-forming emulsion is a water-based acrylate emulsion or a compound of the water-based acrylate emulsion and the water-based polyurethane emulsion. Preferably, the thickener is hydroxyethyl cellulose or a compound of hydroxyethyl cellulose and polyurethane association type thickener, and the film forming auxiliary agent is propylene glycol methyl ether acetate or a compound of propylene glycol methyl ether acetate and dodecyl alcohol ester. The preparation method of the heat-insulating water-based colorful outer wall paint comprises the following steps: (1) Mixing nano silicon dioxide aerogel and a silane coupling agent KH560 by adopting a high-speed mechanical stirrer, stirring at a rotating speed of 500 revolutions per minute to prepare modified nano aerogel, mixing hydroxypropyl starch, glycerol and phthalocyanine blue by adopting a double-screw extruder, plasticizing and extruding at 120 ℃ and 80 revolutions per minute, and crushing and sieving by adopting a high-speed crusher after extruding to obtain colorful particles; (2) Adding a polycarboxylic acid sodium salt dispersing agent and a fatty acid polyoxyethylene ether wetting agent into deionized water by adopting a high-speed