High flame retardant polyurethane foam thermal insulation material and preparation method thereof

Abstract

The invention relates to an environment-friendly polyurethane foam thermal insulation material and a preparation method thereof. The environment-friendly polyurethane foam thermal insulation material is characterized by being composed of combined polyether, a foaming agent, a catalyst, a foam stabilizer, water, and polyaryl polymethylene isocyanate (PAPI), is a novel thermal insulation and anticorrosion polymer synthetic material, and has the advantages of low water vapor penetration index (WVPI) and good watertight property. The provided thermal insulation material is a low density polymer foamed plastic with a closed pore structure; has the thermal insulation and waterproof functions, has a strong adhesion force on metals, wood, cement, glass, and the like; and can be widely used in industries such as construction industry, refrigeration equipment industry, furniture industry, and the like.

Description

technical field [0001] The invention relates to the technical field of organic composite materials, in particular to a high flame-retardant polyurethane foam insulation material and a preparation method thereof. Background technique [0002] As we all know, because rigid polyurethane foam (referred to as PU rigid foam) has excellent physical and mechanical properties, electrical properties, acoustic properties and chemical corrosion resistance, and has strong adhesion with a variety of materials, it is widely used as Thermal insulation materials for petrochemical pipelines, refrigeration equipment, transportation equipment and buildings. However, the oxygen index of PU hard foam without flame retardant treatment is only about 17, which is a flammable material. During the combustion process, toxic gases such as HCN and CO are released, which brings great difficulties to fire fighting and fire escape. Many cases of PU hard foam fires have been reported at home and abroad, cau...

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Problems solved by technology

In the past ten years, my country has successively developed many new flame retardants, such as trichloroethyl phosphate (TCEP), tris (2,32 dibromopropyl) melamine (TBC), dimethyl methyl phosphonate (DMMP) and other organic flame retardants containing phosphorus and halogen, although they can increase the oxygen index of PU hard foam to about 26, but there is still a certain gap with the requirements of fire safety for building insulation materials, such as the current domestic market There is no PU rigid foam product that has reached the first grade of flame retardancy with an oxygen index ≥ 32.0 as stipulated in the GB8624-1997 "Classification of Combustion Performance of Building Materials" regarding the classification of the combustion performance of foam plastics for pipe insulation.

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