A kind of preparation method of composite flame retardant for fireproof heat preservation decorative board

Abstract

The invention discloses a preparation method of a composite flame retardant used for a fireproof and thermal insulation decorative board. The method comprises the following steps: pulverizing hydrated silica by a ball mill to obtain hydrated silica powder; adding an acid solution to the hydrated silica powder to obtain Mix the liquid, add zinc carbonate to obtain a mixed liquid containing zinc carbonate, add aluminum hydroxide particles, silicon dioxide particles and magnesium hydroxide particles to obtain a silicon-magnesium mixed liquid; add absolute ethanol to the sodium silicate, stir evenly After that, the acidic solution is added dropwise to obtain a sol containing silicon; both the sol containing silicon and the magnesium-silicon solution are added to the reaction kettle, and filtered to obtain a solidified mixture; the solidified mixture is rinsed and dried with deionized water to obtain a composite machine Flame retardant; inorganic compounds such as hydrated silica powder, zinc carbonate, aluminum hydroxide particles are added to the flame retardant to improve the flame retardant performance of the flame retardant, and the zinc carbonate can assist the more uniform foam molding of the decorative board .

Description

technical field [0001] The invention belongs to the technical field of preparation of architectural decorative boards, and in particular relates to a preparation method of a composite flame retardant used for fireproof and thermal insulation decorative boards. Background technique [0002] In recent years, my country's construction industry has developed rapidly, which has greatly improved the living conditions and working environment of urban and rural residents. However, most of the buildings in our country have poor thermal insulation and air tightness, and the heating and heating systems are backward, resulting in extremely high building energy consumption in our country. According to statistics, my country's unit energy consumption is 4-5 times the average level of developed countries for exterior walls, 2.5-5.5 times for roofs, 1.5-2.5 times for exterior windows, and 3-6 times for airtightness of doors and windows. Energy consumption accounts for 50-60% of the total en...

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Problems solved by technology

[0005] Although the above patent can solve the effect of flame retardancy, pentaerythritol is flammable and toxic. If the decorative board prepared by the above method is burned, a large amount of harmful gas will be released, which is not conducive to use in public environments

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