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CN-121975355-A - Fireproof flame-retardant wall coating and preparation method and application thereof

CN121975355ACN 121975355 ACN121975355 ACN 121975355ACN-121975355-A

Abstract

The invention discloses a fireproof flame-retardant wall coating and a preparation method and application thereof, and belongs to the technical field of building coatings. The coating consists of pure natural inorganic mineral raw materials, and comprises, by weight, 40-55 parts of aluminosilicate mineral powder, 15-25 parts of high-temperature-resistant inorganic gelatinizer, 8-15 parts of fireproof flame-retardant mineral filler, 5-10 parts of alkali-resistant mineral filler, 3-6 parts of natural mineral toner and 2-5 parts of nano inorganic reinforcing agent. The coating disclosed by the invention is completely free of organic matters, achieves the level GB 8624-2012 A1 in fireproof performance through the synergistic effect of five functional modules, can resist 1200 ℃ high temperature, is subjected to petrochemical infiltration with a base material to be permanently combined with 0.5-1 mm, and has excellent adhesive force, air permeability, weather resistance and environmental friendliness. The preparation method is simple and controllable, the construction process is reliable, and the method is suitable for various mineral substrates and severe environments.

Inventors

  • ZHANG WEIDONG
  • LI XIAOLONG
  • ZHANG XIN
  • ZHANG SHI

Assignees

  • 北京斯凯德弗科技有限公司

Dates

Publication Date
20260505
Application Date
20260313

Claims (10)

  1. 1. The fireproof flame-retardant wall coating is characterized by comprising, by weight, 40-55 parts of aluminosilicate mineral powder, 15-25 parts of high-temperature-resistant inorganic gelatinizer, 8-15 parts of fireproof flame-retardant mineral filler, 5-10 parts of alkali-resistant mineral filler, 3-6 parts of natural mineral toner and 2-5 parts of nano inorganic reinforcing agent.
  2. 2. The fireproof flame-retardant wall coating according to claim 1 is characterized in that aluminosilicate mineral powder is formed by compounding feldspar powder and quartz powder with particle sizes of 300-400 meshes according to a mass ratio of 4-6:1, and high-temperature-resistant inorganic gelatinizing agent is formed by compounding light magnesia with particle sizes of 350-400 meshes and metakaolin according to a mass ratio of 2-3:1.
  3. 3. The fireproof flame-retardant wall coating according to claim 1 is characterized in that the fireproof flame-retardant mineral filler is one or more of aluminum hydroxide powder, magnesium hydroxide powder and calcined diatomite powder, the particle size is 200-300 meshes, and the alkali-resistant mineral filler is formed by compounding calcined kaolin powder with the particle size of 250-400 meshes and talcum powder according to the mass ratio of 3-5:1.
  4. 4. The fireproof flame-retardant wall coating according to claim 1, wherein the natural mineral toner is one or more of iron oxide red, iron oxide yellow, chromium oxide green and titanium white, the particle size is 300-400 meshes, the nano inorganic reinforcing agent is hydrophilic nano silicon dioxide and/or nano titanium dioxide, and the particle size is 10-20 nm.
  5. 5. A method for preparing a fire-retardant wall covering according to any one of claims 1 to 4, comprising the steps of: S1, raw material pretreatment, namely respectively grinding aluminosilicate mineral powder, high-temperature-resistant inorganic gelatinizer, fireproof flame-retardant mineral filler, alkali-resistant mineral filler and natural mineral toner, sieving with a sieve with a corresponding mesh, and keeping the nano inorganic reinforcing agent in an original powder state for later use; S2, primary dry mixing, namely weighing the pretreated raw materials according to parts by weight, putting the raw materials into a low-speed mixer, dry mixing for 10-15 min at a rotating speed of 100-150 r/min to obtain a primary mixed material, and keeping the materials in a dry environment in the dry mixing process; s3, high-speed dispersion, namely transferring the primary mixed material into a high-speed dispersing machine, dispersing for 25-30 min at the rotating speed of 800-1000 r/min, and controlling the material temperature to be less than or equal to 40 ℃ in the dispersing process so as to avoid powder friction heat generation agglomeration and obtain uniform inorganic mineral powder; s4, sealing and packaging the finished product, namely sealing and packaging the inorganic mineral powder in a cool and dry environment with the relative humidity less than or equal to 60 percent to obtain the target finished product coating.
  6. 6. The method for preparing the fireproof flame-retardant wall coating according to claim 5, wherein in the step S1, the water content of all raw materials is controlled to be less than or equal to 0.5%.
  7. 7. The method for preparing a fire-retardant wall coating according to claim 5, wherein in step S3, the material temperature is detected every 5min in the high-speed dispersion process, and the dispersion is stopped or cooled when the material temperature exceeds 40 ℃.
  8. 8. The application of the fireproof flame-retardant wall coating according to any one of claims 1 to 4, wherein the coating is applied to the surface of a mineral building substrate by adding water according to the mass-to-volume ratio of 10kg to 6L, and the coating and the mineral building are subjected to petrochemical action after construction, and penetrate into the substrate for 0.5 to 1mm to realize solidification and combination.
  9. 9. The use of a fire-retardant wall covering according to claim 8, wherein the mineral building substrate comprises concrete walls, plain clay brick walls, fly ash/slag foamed light brick walls, calcium silicate board walls and other building walls of inorganic mineral materials.
  10. 10. The use of a fire-retardant wall coating according to claim 8, wherein the coating is applied directly to the surface of the original coating without removing the original base material when the old mineral building is refurbished.

Description

Fireproof flame-retardant wall coating and preparation method and application thereof Technical Field The invention relates to the technical field of building coatings, in particular to a fireproof flame-retardant wall coating and a preparation method and application thereof. Background Building fire prevention is one of the core requirements of building safety, especially special scenes such as tunnels, underground parking lots, chemical plants, military bases and the like, and along with the improvement of building fire-proof grades, the fire-retardant performance of wall coating becomes a key index. The traditional building wall coating is mainly divided into organic coating and common inorganic coating, wherein the organic coating such as emulsion paint, real stone paint and the like uses polymers such as acrylic ester and the like as film forming substances, the fire-proof grade is only B grade, the problems of inflammable and harmful gas generated during combustion, organic volatile matter pollution, poor weather resistance, easy adsorption of dust, easy foaming and falling of coating and the like exist, and the severe requirements of high-rise buildings, public facilities, inflammable and explosive places and the like on fire-proof safety are difficult to meet. In the prior art, although the schemes of 'water-based low-smoke low-toxicity thin steel structure fireproof paint' or 'antivirus formaldehyde-resistant A-level fireproof inner wall paint' and the like exist, the formula of the water-based low-smoke low-toxicity thin steel structure fireproof inner wall paint still generally contains an organic binder or a plurality of organic auxiliary agents, and the existence of organic matters cannot be fundamentally stopped. The fire disaster prevention agent has potential risks in fire disaster, and the film forming property of the fire disaster prevention agent also often sacrifices the breathing property of the wall body, so that the problems of moisture regain, hollowness, mildew and the like are caused. The inorganic coating field has some technical schemes, but most of the components are single, or only fireproof performance is concerned, and the combination properties of binding force with a base material, air permeability, weather resistance and the like are ignored. For example, a paint using Portland cement alone has high brittleness, high cracking tendency, and poor permeability, while a paint containing only a flame retardant filler such as magnesium hydroxide has insufficient adhesion. Therefore, developing an A1-class fireproof coating which is completely free of organic matters, achieves incombustibility essentially, and has high adhesion, good air permeability and excellent durability is a technical problem to be solved in the art. Disclosure of Invention The invention aims to provide a fireproof flame-retardant wall coating and a preparation method and application thereof, and aims to solve the problems of low fireproof grade, smoke toxicity generated by combustion of the traditional organic coating, single component, insufficient comprehensive performance, poor binding force with a base layer and poor construction adaptability of the traditional inorganic coating. The fireproof flame-retardant wall coating comprises, by weight, 40-55 parts of aluminosilicate mineral powder, 15-25 parts of high-temperature-resistant inorganic gelling agents, 8-15 parts of fireproof flame-retardant mineral fillers, 5-10 parts of alkali-resistant mineral fillers, 3-6 parts of natural mineral toner and 2-5 parts of nano inorganic reinforcing agents. Preferably, the aluminosilicate mineral powder is prepared by compounding feldspar powder and quartz powder with particle sizes of 300-400 meshes according to a mass ratio of 4-6:1, and the high-temperature-resistant inorganic gelatinizer is prepared by compounding light magnesia with particle sizes of 350-400 meshes and metakaolin according to a mass ratio of 2-3:1. Preferably, the fireproof flame-retardant mineral filler is one or more of aluminum hydroxide powder, magnesium hydroxide powder and calcined diatomite powder, the particle size of the fireproof flame-retardant mineral filler is 200-300 meshes, and the alkali-resistant mineral filler is formed by compounding calcined kaolin powder with the particle size of 250-400 meshes and talcum powder according to the mass ratio of 3-5:1. Preferably, the natural mineral toner is one or more of iron oxide red, iron oxide yellow, chromium oxide green and titanium white, the particle size is 300-400 meshes, the nano inorganic reinforcing agent is hydrophilic nano silicon dioxide and/or nano titanium dioxide, and the particle size is 10-20 nm. The invention also provides a preparation method of the fireproof flame-retardant wall coating, which comprises the following steps: S1, raw material pretreatment, namely respectively grinding aluminosilicate mineral powder, high-temperature-resistant inorganic gelatinizer, fir