Foaming cement and foaming polyurethane interpenetrating network thermal insulation board for external wall and preparation of foaming cement and foaming polyurethane interpenetrating network thermal insulation board

Abstract

The invention relates to a foaming cement and foaming polyurethane interpenetrating network thermal insulation board for an external wall and preparation of the foaming cement and foaming polyurethane interpenetrating network thermal insulation board, aiming at overcoming the defects that a foaming cement board has low intensity and is easy to crack, and a foaming polyurethane board is low in cost and poor in fireproof performance and the like. The external wall is characterized by being prepared from foaming cement (a component A) and polyurethane (a component B) through an inserting hole grouting process. In a preparation process, the component A is machined into the foaming cement board and the component B is filled through an inserting hole by pressurizing; after the polyurethane is foamed, the foaming cement and foaming polyurethane interpenetrating network structure can be formed. The foaming cement and foaming polyurethane interpenetrating network thermal insulation board provided by the invention has the advantages that the researched thermal insulation board for the external wall of a building has light weight and the surface-dry density is 100kg / m<3> to 300kg / m<3>; the coefficient of thermal conductivity is 0.03W / (m.K) to 0.05W / (m.K) and the thermal insulation and heat preservation performance is better; the compression strength is 0.2MPa to 3.0MPa; furthermore, the foaming cement and foaming polyurethane interpenetrating network thermal insulation board has the characteristics of sound absorption and noise reduction, fire resistance and flame resistance, low comprehensive cost and the like, and can be widely applied to heat preservation, energy saving and consumption reduction of the external wall of the building.

Description

technical field [0001] The invention relates to a building material with fireproof and thermal insulation functions and its preparation, in particular to a foamed cement and foamed polyurethane interpenetrating network structure external wall thermal insulation board and its preparation. Background technique [0002] Traditional organic insulation materials such as polyurethane have the advantages of light weight, low thermal conductivity, and good heat resistance. They are widely used in existing energy-saving buildings. However, they generally have the disadvantage of not being able to balance insulation and fire prevention. A large amount of toxic smoke is produced, which will not only accelerate the spread of the fire, but also easily cause casualties of trapped people and rescuers. The inorganic thermal insulation material of foamed cement is a new type of lightweight thermal insulation material containing a large number of closed pores, so it has good thermal insulatio...

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Problems solved by technology

However, the foamed cement insulation material has a large capacity, a relatively high thermal conductivity, and high brittleness. In addition, its strength is low, and there is a risk of cracking or even falling off, which seriously limits its application in the field of wall insulation.

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