Fireproof coating primer of single-mass-system indoor thin steel structure

Abstract

The invention relates to a fireproof coating primer of a single-mass-system indoor thin steel structure. The fireproof coating primer comprises the following components in parts by mass: 9-12 parts of adhesive powder, 0.1-0.5 part of powder dispersant, 0.1-0.3 part of powder antifoam agent, 20-24 parts of inorganic insulating filler, 0.0-20.06 parts of coating reinforcing material and 24-28 parts of mixture composed of dehydration catalyst, foaming agent and charcoal forming agent. The fireproof coating is produced by one-step dry powder mixing method, therefore, the production efficiency is improved; the problems that the fireproof coating primer of the emulsion-based double-mass-system thin steel structure is easy to mildew in summer and has unstable foaming performance; and meanwhile, the product cost of package, storage, transport and the like is saved.

Description

technical field [0001] The invention belongs to the technical field of fire protection products, and relates to a production method of a single-system indoor thin steel structure fireproof paint primer. technical background [0002] Steel is a non-combustible building material that is resistant to earthquakes and bending. However, as a building material, steel has some unavoidable defects in fire protection. Its mechanical properties, such as yield point, tensile strength and modulus of elasticity, will drop sharply due to the increase of temperature. The steel structure usually loses its bearing capacity at a temperature of 450-650 ° C, and a large deformation occurs, causing the steel column and steel beam to bend. As a result, it cannot be used due to excessive deformation. The limit is around 15 minutes. [0003] In order to overcome the problem of poor fire resistance of steel structure materials in practical applications, fire protection must be carried out on steel ...

AI Technical Summary

Problems solved by technology

[0008] 1. The production process of dual-system thin steel structure fireproof coating primer is relatively complicated (see the process flow below figure 1 ), generally divided into ammonium polyphosphate powder dispersed in water, sanded and beaten, the slurry is transported to the next section through pipeline pneumatic or manual, and then mixed with binder emulsion, expanded graphite, perlite, etc. in the mixing equipment, The mixed materials are filtered through vibrating sieves and other processes, so the labor productivity is low

[0009] 2. Since the emulsion is prone to mildew at high temperature in summer, the storage period of the fireproof coating is greatly affected. Although the paint factory uses a certain amount of anti-mold and fungicide in the tank to inhibit the damage of microorganisms to the emulsion, this can only be done to a certain extent. Remission does not eradicate

[0010] 3. Catalysts such as ammonium polyphosphate are easy to absorb moisture and undergo water-soluble hydrolysis. The degree of hydrolysis is affected by the pH environment, temperature and influence of the system. Different storage conditions lead to different degrees of hydrolysis of the catalyst, which in turn affects the stability of the foaming performance of the product.

[0011] 4. Dual-system thin fireproof coatings are usually packaged in plastic barrels, which not only increases the cost of production, packaging, and transportation, but also brings damage to the environment

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