Water-based ultra-thin fire-retardant coating for steel structures and preparation method of fire-retardant coating

Abstract

The invention discloses a water-based ultra-thin fire-retardant coating for steel structures. The fire-retardant coating comprises components as follows: a binder emulsion, an intumescent flame retardant system, filler, deionized water and additives, wherein the additives comprise a dispersing agent, an antifoaming agent, a mold inhibitor, an anti-flash-rust agent, a coalescing agent, a leveling agent and a thickener; the intumescent flame retardant system comprises a dehydration catalyst, a carbonizing agent and a foaming agent. The invention further designs a preparation method of the water-based ultra-thin fire-retardant coating for the steel structures. The components are mixed sequentially to be prepared into the water-based ultra-thin fire-retardant coating for the steel structures in a vertical sand mill and a dispersing tank. The prepared coating is large in adhesive force, high in hardness, good in fireproof property, good in anti-scratch performance and excellent in weather resistance and water resistance, the surface layer of the coating is fine and smooth, the decoration performance is improved significantly, and the preparation method is low in energy consumption and has the advantages that the harm to human bodies and the pollution to the environment during preparation are small and the like.

Description

technical field [0001] The invention belongs to the field of paint preparation, in particular to a water-based ultra-thin steel structure fireproof paint and a preparation method thereof. Background technique [0002] With the continuous advancement of social urbanization, steel structures have been widely used in the construction field due to their light weight, excellent mechanical properties, and convenient construction. However, the steel structure has strong thermal conductivity and poor fire resistance. After reaching the critical temperature of 540°C, its mechanical strength will drop sharply, which will cause the building to fail to bear the load and collapse. Therefore, it is necessary to take fire protection measures for the steel structure. It is an economical and practical method to coat the steel structure with a layer of fire-resistant coating. The surface of the steel member is sprayed with a layer of fire-resistant coating. When it encounters flame impact, th...

AI Technical Summary

Problems solved by technology

[0004] However, the water-based ultra-thin fireproof coatings for steel structures currently produced in China generally have poor fireproof performance.

Due to the shortcomings and problems of the expansion layer, such as low expansion ratio, low structural strength, and poor water resistance of the coating film, it is necessary to develop a new type of coating with long flame retardant time, high viscosity and bonding strength, relatively long drying time, no pollution, no fire hazard, and low production cost. It is an urgent problem for technical workers in the field to produce fire-resistant coatings that are convenient for construction.