Inorganic expanded fireproof coating and preparation method

Abstract

The invention relates to a smoke-free inorganic ultrathin expanded fireproof coating and a preparation method thereof. The smoke-free inorganic ultrathin expanded fireproof coating is prepared from water glass, silica gel, expanded graphite, enhanced fiber, expanded perlite, an inorganic flame-retardant agent, an additive, a curing accelerator and water. The smoke-free inorganic ultrathin expanded fireproof coating has the advantages that the physical foaming technique is adopted, the flame-retardant and heat-isolation effects are realized by the inorganic flame-retardant agent and the inorganic foaming agent, the dry film thickness of the fireproof coating layer is 1 to 2mm, and the fire-resistant protection is provided for the substrate for at least 60min; in the construction process, the emission of VOC (volatile organic compound) is avoided, the toxic and harmful gas and smoke are not produced in the fire protection process, and a safe and environment-friendly green functional coating is provided.

Description

technical field [0001] The invention relates to the field of fireproof coatings, in particular to a novel high-efficiency inorganic expansion fireproof coating, which is suitable for the fireproof protection of the surfaces of steel structures, non-metal structures and the like. Background technique: [0002] As a functional coating, intumescent fireproof coating can effectively prevent or delay the spread of fire. Compared with other fireproof materials, it has the advantages of good heat insulation, low density, easy construction, and low cost. Fireproof coatings have no obvious difference from ordinary decorative coatings under normal conditions. When exposed to fire or high temperature, the coating will foam and expand rapidly to form a heat-insulating carbonized layer with a honeycomb structure, thereby preventing or delaying the transfer of heat to the substrate. , to achieve the purpose of improving the fire resistance limit of the substrate. [0003] At present, the...

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Problems solved by technology

However, the disadvantage of this kind of coating is that it adopts an organic system, which releases a large amount of organic solvents during construction and use. Although it has good fire resistance performance after being burned by flames, it will produce a large amount of toxic and harmful smoke during the combustion process. When a fire breaks out, these poisonous and harmful fumes are very dangerous to people, and there is a great potential safety hazard.

Although the ultra-thin intumescent fireproof coating of green environmental protection type has been developed in recent years, adopts water-based resin to make membrane thing, such as patent CN104130671B a kind of water-based ultra-thin intumescent fireproof coating and preparation method thereof for steel structure, water-based resin, The intumescent flame retardant is still an organic system, and the intumescent foaming system still uses chemical foaming technology. Although it can reduce the emission of organic solvents during the construction process, it cannot solve the problem of a large amount of toxic and harmful smoke generated by the combustion of organic matter during the combustion process. question

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