Environment-friendly refractory foam material and preparation method thereof

Abstract

An environment-friendly refractory foam material and a preparation method thereof. The invention relates to a novel foam material capable of being used for energy-saving buildings and preparation thereof. The foam material includes: a sodium silicate component, a polyurethane component, and regular assistant materials and additives. The sodium silicate component (A) includes more than 60% of sodium silicate and also contains more than 0.5% of a catalyst and / or a co-catalyst so that in a normal-temperature foaming reaction, surface dry can be achieved within 10 min. The double components also contain more than 10% of a polyol or a polyol derivative. The polyurethane component (B) is a polyurethane prepolymer or is a combination of the polyurethane with a proper amount of polyisocyanate and / or an organic solvent and / or a plasticizer, wherein the polyurethane prepolymer is formed through a reaction of polyester polyol and / or polyether polyol and polyisocyanate, NCO content being 8-25% or8-13%. The weight ratio of component A to the component B is 1:1-1.5. The foam material is environment-friendly and refractory and has excellent heat insulation effect, is low in smoke density and toxicity, has good dimensional stability, has both rigidity and flexibility, and is low in manufacturing cost.

Description

technical field [0001] The invention relates to a foam, especially a flame-retardant polyurethane foam material. Background technique [0002] Adding a large amount of flame retardant to the existing polyurethane foam may affect the mechanical properties or is not environmentally friendly or has potential health problems, and the smoke density and smoke toxicity are high; while adding some water-based environmental protection components to the polyurethane system often causes a large number of open cells in the foam and the texture changes. Brittle, poor dimensional stability; adding water glass will seriously affect the amount of foaming and brittle slag, directly add polyisocyanate or prepolymer or even add catalyst to water glass because of the strong absorption of carbon dioxide by water glass. Foaming, although it may foam when water and organic solvents are added or when there is less water glass, the foam is brittle, low in strength, and generally has open cells, whic...

AI Technical Summary

Problems solved by technology

[0002] Adding a large amount of flame retardant to the existing polyurethane foam may affect the mechanical properties or is not environmentally friendly or has potential health problems, and the smoke density and smoke toxicity are high; while adding some water-based environmental protection components to the polyurethane system often causes a large number of open cells in the foam and the texture changes. Brittle, poor dimensional stability; adding water glass will seriously affect the amount of foaming and brittle slag, directly add polyisocyanate or prepolymer or even add catalyst to water glass because of the strong absorption of carbon dioxide by water glass. Foaming, although it may foam when water and organic solvents are added or when there is less water glass, the foam is brittle, low in strength, and generally has open cells, which is not practical; polyvinyl alcohol and polyvinyl acetate emulsion It has good flexibility, hydrophilicity and environmental protection, especially the aqueous solution, the price is cheap, but because it is very sensitive to water glass, it will gel immediately after mixing, so it is difficult to use with water glass