Non-halogen flame retardant hard polyurethane foam material and preparation method thereof

Abstract

The invention provides a non-halogen flame retardant hard polyurethane foam material and a preparation method thereof. The material is composed of a component A and a component B, and the weight ratio of the component A to the component B is 1:(1-1.5), wherein the component A comprises, by weight, 6-20 parts of phenolic resin, 60-80 parts of polyether polyol, 5-10 parts of expansible graphite, 1-4 parts of catalysts, 16-30 parts of compounded flame retardant, 1-3 parts of polysiloxane foam stabilizers and 15-30 parts of foaming agent, the component B is isocyanate, and the compounded flame retardant is made of magnesium hydrate, water glass, an silane coupling agent and nano montmorillonite. The foam material improves the flame retardant property, lowers the influence of the flame retardant on the mechanical property of the foam material and further improves the foaming property.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials, and in particular relates to a halogen-free flame-retardant rigid polyurethane foam material and a preparation method thereof. Background technique [0002] In recent years, due to the frequent occurrence of high-rise building fires, it has brought serious losses to the country and the people. The reason is mainly caused by flammable external wall insulation materials, so improving the flame retardancy of external wall insulation materials has become a hot research topic. There are currently two main types of organic insulation materials on the market, one is polystyrene foam and the other is polyurethane foam. Among them, polystyrene foam is a thermoplastic polymer material. When heated and burned, polystyrene foam will melt and flow, and it is difficult to flame-retardant it. Polyurethane foam is a thermosetting polymer material, which will only decompose and shrink when ...

AI Technical Summary

Problems solved by technology

However, although the addition of these ingredients can significantly improve the fireproof properties of the foamed polyurethane material, the foamability of the polyurethane material is greatly reduced at the same time, and it cannot completely fill all the corners of the mold cavity of the foaming mold, so it is impossible to produce a delicate surface. detail

In addition, the addition of the above-mentioned fireproof components to foamed polyurethane materials also increases the overall weight of the material, which is not conducive to the use of interior decoration.

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