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Thin-coated steel structure fire-retardant paint coatings with a thickness of 3 to 7 mm are called thin-coated steel structure fire-retardant coatings. The coating can expand and expand when fired, and the fire-resistant thermal insulation layer formed by expansion foaming delays the temperature rise of the steel and protects the steel member.
Such steel structure coatings are generally composed of a suitable latex polymer as a base material, together with a flame retardant, an additive, and the like. For such fire retardant paints, the emulsion polymer selected must have good adhesion, durability and water resistance to the steel substrate. The emulsion polymers commonly used as such fire retardant binders are styrene-modified acrylic emulsions, polyvinyl acetate emulsions, vinylidene chloride emulsions and the like. For fire retardant coatings based on aqueous emulsions, flame retardant additives, Pigments and fillers are dispersed in water, so that water actually acts as a dispersion carrier. In order to better disperse the various additives in the granular form, a Dispersant is also added. Such as the commonly used sodium hexametaphosphate. This type of steel structure fireproof coating is generally divided into three steps in the production process: the first step is to disperse various flame retardant additives in water and then grind them into a slurry of a specified fineness; the second step is to use a base material for compounding. Paint; the third step is to mix the inorganic light materials with the enhanced materials in the slurry. The coating is generally divided into a bottom layer and a surface layer, and the decoration is better than the thick coating type, and the construction is sprayed, and the fireproof limit is generally required to be no more than 2 hours on the steel structure of the building.
Thick-coated steel structure fire-retardant paint Thick-coated steel structure Fire-retardant paint refers to coatings with a coating thickness of 8 to 50 mm. The fire resistance of such fire-retardant coatings can reach 0.5 to 3 hours. This type of steel structure fire retardant coating uses a suitable binder, combined with inorganic lightweight materials and reinforcing materials. In the fire, the coating does not swell, relying on the non-combustibility of the material, low thermal conductivity or the heat absorption of the material in the coating, delaying the temperature rise of the steel and protecting the steel. In addition to some of the advantages of water-soluble fire retardant coatings, it is less expensive than other types of steel fire retardant coatings because it is inorganic from the base to most of the additives. This type of steel structure fireproof coating construction is generally sprayed, and is applied to indoor steel structures with fire resistance requirements of more than 2 hours. However, such products are relatively poor in decorative appearance due to the thick coating. 
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3. Physiological antioxidant. Coenzyme for a number of hydroxylation reactions; required for collagen synthesis. Widely distributed in plants and animals. Inadequate intake results in deficiency syndromes such as scurvy. Used as antimicrobial and antioxidant in foodstuffs.
Differences in different coating thicknesses of steel structure fireproof coatings
Steel structure fireproof coatings are mainly divided into: thin-coated steel structure fireproof coatings and thick-coated steel structure fireproof coatings.