Inorganic waterproof anticorrosive coating and preparation method thereof

Abstract

The invention discloses an inorganic waterproof anticorrosive coating and a preparation method thereof. The coating is composed of the following raw materials: silicon sol, calcium sulphate whisker, a pigment, a filling agent, an ethylene-propylene emulsion, propylene glycol, a pH regulator, a dispersing agent, a film-forming aid, a defoaming agent, a thickening agent and water. The preparation method comprises the following steps: weighing all the raw materials in proportion, and dividing the defoaming agent into a part A and a part B which are equal in weight; adding water in a container, adding the silicon sol, the dispersing agent, the part A of the defoaming agent, the propylene glycol and the pH regulator at a low rotating speed, and uniformly dispersing; adding the pigment, the filling agent and the calcium sulphate whisker at an increased rotating speed, and dispersing the materials until the grain fineness is less than 50mu m; sequentially adding the part B of the defoaming agent, the film-forming aid, the ethylene-propylene emulsion and the thickening agent at a reduced rotating speed, and uniformly dispersing. The coating disclosed by the invention has excellent waterproof, anti-corrosion and anti-seepage properties, and is non-toxic and environmental-friendly; and the preparation method is simple in operation, convenient to produce, low in requirements on equipment, and suitable for industrial mass production.

Description

technical field [0001] The invention belongs to the technical field of architectural coatings, and in particular relates to an inorganic waterproof and anticorrosion coating and a preparation method thereof. Background technique [0002] The waterproof paint is painted on the surface of the building, and a thin film is formed after the chemical reaction between the components, which isolates the surface of the building from water, thus playing the role of waterproof and sealing. The waterproof film formed after the waterproof coating is cured should have certain extensibility, elastic-plasticity, crack resistance, impermeability and weather resistance, and can play the role of waterproof, anti-seepage and protection. [0003] Waterproof coatings currently mainly include asphalt-based waterproof coatings, polymer bitumen-based waterproof coatings, polymer cement waterproof coatings, silicone waterproof coatings, polyurethane waterproof coatings, and polyurea waterproof coatin...

AI Technical Summary

Problems solved by technology

Among them, asphalt-based waterproof coatings have poor low-temperature flexibility and crack resistance, so they have been basically eliminated; polymeric asphalt-based waterproof coatings have greater environmental pollution, unstable quality, and average mechanical properties, waterproof performance and durability. , can only be used for waterproofing projects with low requirements; polymer cement waterproof coatings not only have the extensibility and waterproofness of polymer coatings, but also have the advantages of high strength of hydraulic gel materials and easy bonding of wet bases. In recent years, It has been successfully applied in some projects, but there are shortcomings such as insufficient bridging ability for cracks and too long complete curing time, which limit the scope of application; silicone waterproof coatings have disadvantages such as poor hardness, high viscosity, and contamination of the surface of the substrate; Polyurethane waterproof coating is an elastic coating with excellent mechanical properties and good flexibility. It is very popular at home and abroad, but its yellowing resistance is poor, and it contains solvents, isocyanates and other substances harmful to the human body. It cannot be applied in the field; polyurea waterproof coating has many advantages, but due to its extremely fast curing speed, it is difficult to achieve good mixing and atomization during construction, and technical defects such as pinholes will appear if there is a slight improper operation. The operating level of workers and the dependence on special equipment are strong, which limits its application and promotion

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