Paint knowledge | what material is fireproof paint? Composition analysis of fireproof paint

Core tip: the application of fire retardant paint is more and more common in today's society, so what is the material of fire retardant paint? Xiaobian will analyze the composition of fire retardant paint for you today The basic components of thick coating fire retardant coating for steel structure are: binder (Portland cement, magnesium oxychloride or inorganic high temperature binder, etc.), aggregate (expanded vermiculite, expanded perlite, aluminum silicate fiber, mineral wool, rock wool, etc.), chemical auxiliary (modifier, hardener, waterproof agent, etc.), water Portland cement, magnesium oxychloride cement and inorganic binder are the base materials of steel structure fire retardant coating The commonly used inorganic binder includes alkali metal silicate and phosphate But in alkali metals Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Home of coatings news: the application of fire retardant paint is more and more common in today's society, so what material is the fire retardant paint made of? Xiaobian will analyze the composition of fire retardant paint for you today The basic components of thick coating fire retardant coating for steel structure are: binder (Portland cement, magnesium oxychloride or inorganic high temperature binder, etc.), aggregate (expanded vermiculite, expanded perlite, aluminum silicate fiber, mineral wool, rock wool, etc.), chemical auxiliary (modifier, hardener, waterproof agent, etc.), water Portland cement, magnesium oxychloride cement and inorganic binder are the base materials of steel structure fire retardant coating The commonly used inorganic binder includes alkali metal silicate and phosphate But there are always free alkali metal ions in alkali silicate The acid gas and CO2 in the air will react with them If alkali silicate is used as the base material of the coating alone, the coating will not be water-resistant, moisture-resistant and weather resistant, and the coating is prone to cracking, powdering and other adverse phenomena Therefore, if alkali silicate is used as the base material of fire retardant coating for steel structure, the first key problem to be solved is to modify it, that is to solve the problem of restraining free alkali metal ions Phosphate binder is also a commonly used inorganic binder When it is used as the base material of fire retardant coating, the problem of reaction between basic oxide and acid gas in the air is avoided, so as to improve the physical and chemical properties of the coating, such as weather resistance and water resistance However, the molar ratio of M / P (M refers to metal, P refers to phosphorus) in phosphate binders has a direct impact on the storage stability, water resistance and adhesion between coatings and steel substrates Therefore, in the development of phosphate based fire retardant coatings for steel structures, it is very important to control the molar ratio of the base materials Because the coating of thick steel structure fireproof coating is thick and the amount of coating is large, the self weight of building is increased Therefore, it should be noted to add some lightweight materials and high-efficiency thermal insulation aggregate in the coating to reduce the density of the coating The most widely used lightweight thermal insulation aggregates are expanded vermiculite and expanded perlite Vermiculite is a kind of aluminosilicate mineral with iron and magnesium It has layered structure and crystal water between layers When heated and expanded, it wriggles like a leech, hence the name vermiculite Vermiculite is dried, crushed and screened, and calcined at 850-1000, the particles will expand more than 20 times, forming expanded vermiculite Its density is 80 ~ 200kg / m3, thermal conductivity is 0.17 ~ 0.25W / (m · K), fire resistance is strong, sound absorption, sound insulation performance is good, non-toxic and tasteless, is an important admixture of fire retardant coating Perlite is a glassy rock It can be expanded to about 20 times after breaking, sieving, preheating and instant roasting, forming an expanded perlite with honeycomb like structure The expanded perlite is very light in weight, with a unit weight of 80-250kg / m3 and a thermal conductivity of 0.042-0.076w / (m · K) It has the characteristics of heat preservation, heat insulation, non combustion, non-toxic, good chemical stability, and is also an important filler in fire retardant coatings The above is the composition of fireproof paint, I hope to help you Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,