Aqueous low smoke low toxicity thin section steel structure fire-resisting paint and preparation thereof

Abstract

The invention relates to a water-based low smoke low toxicity thin type fire resisting coating for a steel structure and a preparation method thereof, which belongs to technical field of coating. The invention aims to improve the main performance indexes of the prior thin type fire resisting coating for the steel structure such as fire resisting performance, bond strength, water resistance, cold and hot cycle resistance, and the like, and reducing the quantity and toxicity of the flue gas produced by the coating reacting with fire. The water-based low smoke low toxicity thin type fire resisting coating for the steel structure comprises the following components: water soluble acrylic ester emulsion, low sulfur expandable graphite, ammonium polyphosphate, wollastonite, spherical closed pore expanded perlite, a filler and an additive. The preparation method comprises the following steps: 1, mixing and grinding ammonium polyphosphate, wollastonite, the filler and water soluble acrylic ester emulsion; 2, adding water soluble acrylic ester emulsion, low sulfur expandable graphite, spherical closed pore expanded perlite and the additive, and agitating the raw materials evenly; and 3, adding water to adjust the viscosity of the coating. The invention is suitable for the coating carrying out the fire resisting protection on the steel structure and the preparation method thereof.

Description

technical field

[0001] The invention relates to the technical field of coatings, in particular to a coating for fire protection of steel structures and a preparation method thereof. . Background technique

[0002] Steel structures are widely used in modern buildings. However, the fire resistance of the steel structure is poor, and the mechanical strength of the steel decreases with the increase of the temperature. The bearing capacity of the commonly used construction steel decreases sharply at around 540°C. The general building fire fire scene temperature is mostly between 800 ~ 1200 ℃. The exposed steel structure will lose its bearing capacity and collapse in just over 10 minutes in the fire scene, causing heavy casualties and economic losses. Therefore, fire protection must be carried out on steel structures. Among various fire protection technical schemes, the use of steel structure fire retardant coatings to protect steel structures has the advantages of light weigh...

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