Thermal insulation material composite additive and application thereof

Abstract

The invention relates to the field of buildings, in particular to a thermal insulation material composite additive and application thereof. The composite additive comprises the following components: magnesium oxide, MgSO4.7H2O, fly ash, aluminum hydroxide, a modifier and a mixed additive. The composite additive is applied to preparation of the non-combustible heat-preservation fireproof plate, specifically, a polystyrene foaming plate serves as a base material, and the composite additive is injected into the polystyrene foaming plate under the vacuum condition to prepare the non-combustible heat-preservation fireproof plate. The non-combustible heat-preservation fireproof plate prepared from a composite additive is low in density, has a heat conductivity coefficient of 0.0415-0.0418 (w / m.k) and a combustion grade of grade A, has the characteristic of excellent comprehensive performance, is an ideal external wall heat preservation material, is simple and convenient to install and construct and high in cost performance, is pollution-free and emission-free in the use process, and meets the environmental protection requirements.

Description

Technical field [0001] The invention relates to the field of construction, in particular to a composite auxiliary agent for thermal insulation materials and applications thereof. Background technique [0002] In recent years, with the in-depth advancement of building energy conservation, the demand for wall insulation materials has increased dramatically. Commonly used insulation materials are mainly divided into two categories: organic insulation materials and inorganic insulation materials. [0003] Organic insulation materials, such as: polyurethane foam board, polystyrene foam (including XPS extruded board, polystyrene foam polystyrene board, phenolic resin foam board, etc.), these materials have good insulation performance, but these materials are flame retardant Performance, thermal stability, and material strength are not ideal, and the actual combustion level is below B2. At present, a lot of work has been done on the flame retardant modification of polystyrene, but the mod...

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Problems solved by technology

However, in actual engineering construction, it is found that the higher the density of the insulation board, the greater the shear force, which has an impact on the service life of the mechanical anchors and adhesives in the thin plaster insulation system. The wind load capacity will be greatly weakened due to the high density of the insulation board, resulting in the problem that the insulation layer is easy to fall off

[0007] At this stage, for density less than 140kg / m 3 Whether the composite benzene board can meet the construction industry industry standard has not been reported. Therefore, it is an urgent problem to be solved to provide a thermal insulation material with low density, low thermal conductivity, high strength, good stability and good flame retardancy.

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