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Classification and performance analysis of waterborne fireproof paint
Release date:
2022-02-11 09:35
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Waterborne fireproof paint is a special coating for the surface of combustible base material, which can reduce the flammability of the surface of the coated material, delay the rapid spread of the fire, and improve the fire resistance limit of the coated material. According to its application field, fire retardant coating can be divided into: decoration, wood, steel structure, concrete structure, tunnel, cable and so on.
Waterborne fireproof paint is along with the fireproof coating application field unceasing expansion and the environmental protection law unceasing improvement but appears. Waterborne coatings with its green, health, environmental protection and other environmental protection functions become the general trend of industry development. Because of its excellent environmental protection, construction safety and fire resistance, water-based expansive fireproof coating is gradually favored by many owners and designers. At present, there are more than 100 water-based fireproof paint manufacturers in China, with tens of thousands of tons of output and dozens of varieties.
At present, our country water - based fire - proof paint mainly to finish and thick paste type. From the film forming properties can be divided into: synthetic polymer emulsion type, water-soluble resin type, inorganic adhesive dosage form several categories.
Synthetic polymer emulsion types: film forming materials for styrene-acrylic emulsion, pure acrylic emulsion, vinyl acetate emulsion and so on. It is made by adding inflatable flame retardant and other materials.
Urea-formaldehyde melamine resin has the advantages of light color, good light resistance, no mildew, fast drying, low cost, good adhesion, water resistance, oil resistance, heat resistance, excellent electrical properties, and can be used as a carbon source and gas source. Therefore, it is favored by many manufacturers and highly valued by researchers. China has made great achievements in this regard.
Type of inorganic binder: silicate cement, magnesium hydroxide or other inorganic high temperature binder, expanded perlite, mineral wool and other aggregate, other chemical additives and water. Mainly non - expansive, the disadvantage is large dosage, thick coating. But it can be used outdoors, so it also achieves a good application effect.
In these kinds of waterborne fire retardant paint, inorganic binder fire retardant coating is environmental protection varieties, but there are still some technical shortcomings in the physical and chemical properties of the coating. Water-soluble amino resin and urea-formaldehyde resin although the comprehensive fire protection effect is very good, but because of the high formaldehyde content, lack of good enough environmental performance, is not optimistic in the market.
It is understood that water - based fire - proof paint widely used on the market is mostly synthetic polymer emulsion. Through the efforts of researchers, its fire performance can reach the national decorative fire retardant coating standards, with a strong decorative. However, there are also some defects, such as difficult storage and application at low temperature, the emulsion itself contains different degrees of solvents or film forming additives, and compared with solvent based coatings, water resistance and adhesion are obviously insufficient. This needs to be upgraded and improved. In recent years, the waterborne ultra-thin expansion steel structure fire retardant coating is a new research direction.
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