A kind of inorganic filler composite polyurethane insulation board and its preparation method and application

Abstract

The invention provides an inorganic filler composite polyurethane insulation board and its preparation method and application. The inorganic filler composite polyurethane insulation board is an insulation board integrally formed with inorganic filler and polyurethane. The mass of the insulation board is 100%. The content of the filler is 87.5%-95%, and the content of the polyurethane is 5%-12.5%. The preparation method comprises the following steps: pulverize the inorganic filler, add it into the mould, mix the polyurethane raw materials uniformly, inject and react, and obtain the inorganic filler composite polyurethane insulation board. The inorganic filler composite polyurethane insulation board of the present invention has excellent flame retardant performance (can meet the requirements of Class A flame retardant) and thermal insulation performance (thermal conductivity is not more than 0.045 W / (m∙K)), and is convenient for construction, suitable for building exterior External wall insulation or industrial insulation field.

Description

technical field [0001] The invention belongs to the field of building materials, and relates to an inorganic filler composite polyurethane insulation board, a preparation method and application thereof. Background technique [0002] With the continuous improvement of energy saving and safety requirements, the requirements for thermal insulation and flame retardancy of external wall insulation systems are getting higher and higher. Traditional thermal insulation materials, such as rock wool, can meet the flame retardant effect of Class A (GB / T8624-2012, the same below), but the thermal conductivity is relatively high, about 0.045 W / (m∙K), and the construction is more difficult. The thermal conductivity of benzene board and other materials is as low as about 0.032 W / (m∙K), but the flame retardant effect can only meet the B1 level, and cannot meet the A level flame retardant requirements. [0003] CN106116328A discloses a polyurethane composite cement-based expanded perlite in...

AI Technical Summary

Problems solved by technology

Traditional thermal insulation materials, such as rock wool, have a flame retardant effect that meets Class A (GB / T8624-2012, the same below), but have a high thermal conductivity of about 0.045 W / (m∙K), and construction is difficult

The thermal conductivity of benzene board and other materials is as low as 0.032 W / (m∙K), but the flame retardant effect can only meet the B1 level, and cannot meet the A level flame retardant requirements

[0003] CN106116328A discloses a polyurethane composite cement-based expanded perlite insulation board and its preparation method. The invention adopts polyurethane to modify cement mortar, and disperses polyurethane resin and cement evenly in expanded perlite. The hydration of cement and polyurethane The curing process is carried out at the same time to form an overall structure filled with each other. The expanded perlite is combined with the polyurethane cement-based composite material, and the polyurethane composite cement-based expanded perlite insulation board is made by molding. The polyurethane composite cement-based expanded perlite insulation board of the invention is The thermal insulation board has the characteristics of excellent heat preservation, water repellency, compression resistance, flexural resistance, light weight, non-toxicity, low price, low thermal conductivity, good sound insulation effect, etc. It has the advantages of the same service life as buildings, but the polyurethane of this invention is two-component, and the preparation process is relatively complicated, and the thermal insulation performance of the thermal insulation board of this invention needs to be further improved

[0004] CN109469217A discloses a high-strength composite thermal insulation board and its preparation method. The composite thermal insulation board of the invention is prepared by combining an inner thermal insulation layer, an outer thermal insulation layer and a facing layer. The inner thermal insulation layer is made of flame-retardant polyurethane foam, which has Good flame retardant, heat insulation, and sound insulation properties; the outer insulation layer is made of expanded perlite fireproof insulation board, which has high strength, aging resistance and corrosion resistance. The outer insulation layer is sprayed with fluorocarbon topcoat, which improves the corrosion resistance of the composite insulation board ability, enhanced weather resistance, and prolonged service life, but the flame retardant grade that the composite insulation board of this invention can achieve is not clearly given, and the preparation method is relatively cumbersome

Although the insulation board prepared by this invention has relatively excellent insulation effect, the flame retardant effect still needs to be further improved

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