Preparation method of composite flame retardant for fireproof thermal-insulation decorative plate

Abstract

The invention discloses a preparation method of a composite flame retardant for a fireproof thermal-insulation decorative plate. The preparation method comprises the following steps of pulverizing hydrated silica through a ball mill to obtain hydrated silica powder, and adding an acidic solution into the hydrated silica powder to obtain a mixed liquid; adding zinc carbonate to obtain a mixed liquid containing zinc carbonate; adding aluminum hydroxide particles, silicon dioxide particles and magnesium hydroxide particles to obtain a silicon-magnesium mixed solution; adding absolute ethyl alcohol into sodium silicate, uniformly stirring, and dropwise adding an acidic solution to obtain silica-containing sol; adding the silicon-containing sol and the silicon-magnesium solution into a reactionkettle, and filtering to obtain a cured mixture; and washing and drying the cured mixture with deionized water to obtain a compound machine flame retardant. According to the preparation method, the hydrated silica powder, the zinc carbonate, the aluminum hydroxide particles and other inorganic compounds are added into the flame retardant, the flame retardant property of the flame retardant is improved, and the zinc carbonate can assist in more uniform foam forming of the decorative plate.

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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