Fire-retardant polyurethane foam and preparation method thereof

Abstract

The invention relates to fire-retardant polyurethane foam which is characterized by being prepared by foaming of a black material and a white material with a mass ratio of 1:1.2-1.4. The black material is isocyanate; the white material comprises the following components by weight: 5-15 parts of water glass; 40-55 parts of polyether polyol; 40-60 parts of polyester polyol; 0.1-0.5 parts of catalysts; 2-5 parts of foam stabilizers; 5-15 parts of halogen-free fire retardants; and 5-15 parts of graphite fire retardants. The invention also provides a preparation method of the fire-retardant polyurethane foam. According to the invention, water glass instead of chlorofluorocarbon foaming agents is added into existing polyurethane foam formulae, which effectively reduces environment pollution; the combined effect of water glass, halogen-free fire retardants, and graphite fire retardants improves the fire retardance of polyurethane, and the fire-retardant polyurethane foam is applicable to fields of building materials, furniture, insulation materials, automobile seat cushions and interior trims, and the like.

Description

technical field [0001] The invention relates to a flame-retardant polyurethane foam and a preparation method thereof, in particular to adding graphite on the basis of water glass foamed polyurethane to improve flame retardancy and a preparation method thereof. Background technique [0002] Polyurethane foam is a resin-based body made of numerous small pores inside it by chemical or physical methods. According to its application, it can be divided into soft foam, hard foam and semi-hard foam. [0003] Ordinary polyurethane is combustible, and it burns and decomposes in case of fire to produce a large amount of toxic smoke, which brings difficulties to fire extinguishing. Especially polyurethane soft foam has a high opening rate, many combustible components, is flammable and not easy to self-extinguish. However, the current application fields of polyurethane foam, such as building materials, mattresses, furniture, insulation materials, car seat cushions and interior materials...

AI Technical Summary

Problems solved by technology

[0004] The traditional flame retardant method is to add a flame retardant to the raw material to achieve the flame retardant effect, or to improve the flame retardancy by introducing a flame retardant group into the polyether polyol, but the effect is not ideal, and the oxygen index does not exceed "27 "

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