The material basis of an expanded fireproof coating

China Coatings Online News Information
Different types of fire protection coatings are different fire-resistant, then some of the substances are also essential, expansion-type fire-resistant coatings in auxiliary materials, generally encounter high temperature will produce expansion layer. Foaming agent fire decomposition and release ammonia, water, carbon dioxide, hydrogen halide and other non-combustible gases, so that the coating in the case of reaching the softening point foaming expansion, forming a spongy structure.carbon agent is the material basis of the foam carbonization layer that is coated to form a non-flammable three-dimensional spatial structure at high temperature, and it has a skeleton effect on the foam carbonization layer. Carbonizer in the decomposition temperature to match the catalyst, when the use of polyphosphate as a catalyst on the application of high thermal stability of high carbon polyhydroxy compounds as carbon agents, such as glucodol, disterol ultra-thin fire protection coatings used in Guangdong Daya Bay nuclear power plant exposed factory housing rack has been more than a decade, can still be used normally. But its disadvantages are the construction of large odor, easy aging coating, starch and so on. The use of starch to make a carbon agent, the water resistance of the coating is not easy to solve, and the second quarter of glycol due to its price reasons, also rarely used in the country, the current domestic general use of glycol as a fire-resistant coating carbon agent.
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