Nano-reinforced polyurethane foam and foam cement composite insulation board

Abstract

The invention discloses a nano-reinforced polyurethane foam and foam cement composite insulation board. The nano-reinforced polyurethane foam and foam cement composite insulation board is prepared from, by weight, 3-4 parts of waste cotton and hemp fibers, 1-1.2 parts of chlorinated paraffin, 0.3-0.34 part of fatty alcohol-polyoxyethylene ether, 45-50 parts of ultrafine silicate cement, 3.5-4 parts of 30wt% hydrogen peroxide, 3-3.5 parts of gypsum powder, 2-3 parts of stearic acid, 2.5-3 parts of aluminum sulfate, 1.6-1.8 parts of silicone emulsion, an appropriate quantity of deionized water, 75-80 parts of polyoxypropylene polyol, 23-25 parts of isocyanate, 2.2-2.4 parts of N,N,N',N'',N''-pentamethyldiethylenetriamine, 10-12 parts of n-pentane, 1.5-2 parts of methylsilicone oil, 8-10 parts of ammonium high-polyphosphate, 1-1.2 parts of dimethyl methylphosphonate, 5-6 parts of nanometer titania, 1.5-2 parts of silane coupling agent kh550 and 3-4 parts of triethanolamine. The nano-reinforced polyurethane foam and foam cement composite insulation board has the advantages of high strength, stable performance and long service life when used for external wall insulation.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a composite insulation board of nano-reinforced polyurethane foam and foamed cement. Background technique [0002] The implementation of building energy-saving policies and building fire protection regulations has promoted the rapid development of wall insulation materials. Polyurethane rigid foam board, polystyrene foam board, phenolic foam board and other organic insulation materials have been widely used in building insulation projects because of their excellent thermal insulation performance. The fatal weakness of polyurethane foam is its combustion performance, which is easy to be ignited and releases harmful gases during combustion. Even the addition of flame retardants cannot fundamentally change this property, and the highest combustion level of polyurethane foam boards for construction can only be B1. Inorganic insulation materials such as foamed cement insu...

AI Technical Summary

Problems solved by technology

The composite insulation board made has good fire resistance, and the thickness is small, the overall density of the composite board is low, which reduces the energy consumption in the production process, environmental protection and energy saving; but because the foamed cement layer is located outside the insulation board, it is light and porous The characteristics make it have high water absorption, the higher the moisture content, the worse the insulation and the lower the strength, which limits the application of composite insulation boards, which need to be modified