Thick coating steel structure fire retardant coating composition

Thick coating steel structure fire retardant coating composition

Thick coating steel structure fire retardant coating composition
Thick coating steel structure fire, also known as inorganic light body spray material or refractory coating composition, attributed to the non-swelling fire retardant paint, the primary can be divided into vermiculite-cement, mineral fiber-cement, magnesium oxychloride cement-based and other inorganic lightweight system and other categories. Such coatings are used as a suitable adhesive base materials, together with inorganic lightweight materials, reinforcing material composed of a premix. Compared with other types of fireproof coatings, in addition to some of the unexpected benefits of having a water-based fire retardant paint, fire-resistant coating composition but also because they expect most from the base are inorganic additives, and therefore low-cost capital is one of its major outstanding Features. Hainan Steel
Thick coating of steel structure fire base is constituted: binder (Portland cement, chlorine, magnesium oxide or inorganic high-temperature bonding agent), aggregates (swollen vermiculite, perlite swell, aluminum silicate fiber, mineral wool , rock wool, etc.), chemical additives (modifiers, hardeners, water, etc.), water. Such as steel eh enough fire coating binders are Portland cement, cement and inorganic chlorine magnesia binder, conventional inorganic binder include alkali metal silicates and phosphates substances.

But in the alkali metal silicates usually exist free of alkali metal ions in the air of acid gases such as CO2 and other chemical reactions to its attack. Assumptions used alone as an alkali metal silicate binder coating film will not water, tidal intolerance, poor weather, and the coating exhibits a simple crack, powder off the negative phenomena. Thus the choice of the alkali metal silicates assume eh enough as a fire retardant coating steel base material, the first to deal with the key question is to be modified, that is, treatment of the free alkali metal ions restrain doubt. Now the path address this question mostly chosen fluoro silicates, borates and the like organic polymers be modified, so as to constitute a net-like structure of the body is then fixed an alkali metal ion, without by reaction with CO2 and other acid gases, and improve the physical and chemical coating function.
Phosphate binders are also commonly used inorganic binder, use it as a fire retardant coating binders, avoid alkaline oxide and acid gases in the air response questions, and then increase the coating weather resistance, water resistance, etc. Physical and chemical function indicators. But the phosphate binder in a molar ratio of M / P's (M refers to the metal, P is phosphorus) paint storage stability, water resistance, and paint and steel substrate adhesive force and other functions have a direct impact. Thus, in the phosphate-based material fireproof coatings research and development, the base material mole ratio control is very important. Hainan Steel
Because the coating thickness thick coating steel structure fire and the amount of many, there is perhaps add the weight of buildings. Thus, in the coating formulation should pay attention to participate in a number of lightweight materials and efficient thermal insulation coatings to reduce the density of aggregate. Now the most used lightweight aggregate primary insulation is swollen vermiculite and perlite swell.
Different manufacturers of thick steel structure fire coating commodity situation different. Some make a full minute produced by the factory, is dry powder, single-component package in the field use of water allocation; some two-component packaging, into powder and liquid material, on-site press must share allocations after use, sometimes need another water production. Some fire-resistant coating as a single coating, applied to the rules of the thickness can be; some paint into the bottom, the middle layer and the surface layer of paint, you need to leave a certain thickness of the coating application.
Construction thick coating of steel structure fire paint spraying across the selection method can also be trowel, depending on the fire resistance of the coating thickness requirements of each member may be. In addition to having a low density, low thermal conductivity, good fire-resistant insulation items of interest surprises thick coating steel structure fire most outstanding feature is the high reliability, usually just a coating that does not fall, do not crack, its fire-resistant The attenuation function will be the slowest. Hainan Steel