Flame-retardant rigid polyurethane thermal insulation material and preparation method thereof

Abstract

The invention discloses a flame-retardant rigid polyurethane thermal insulation material. According to the flame-retardant rigid polyurethane thermal insulation material, phosphorus oxychloride is used as a coupling agent, polyethylene glycol is used as a phase change energy storage substance, the polyethylene glycol is bonded to polyether polyol, the acid value of the polyether polyol is adjustedthrough diethanol amine, then the polyether polyol and polymethylene polyphenyl isocyanate are subjected to a foaming reaction, and a flame retardant, a stabilizer, a foaming agent and a catalyst aresimultaneously added so as to obtain the maerial. According to the invention, the phase-change energy storage material and the flame-retardant elements are chemically introduced at the same time so that the hard polyurethane thermal insulation material is endowed with good flame retardancy while the thermal insulation performance of the hard polyurethane thermal insulation material is maintainedor even improved.

Description

technical field [0001] The invention relates to a flame-retardant rigid polyurethane, in particular to a flame-retardant rigid polyurethane thermal insulation material and a preparation method thereof. Background technique [0002] In the current building energy-saving and thermal insulation technology systems in China, rigid polyurethane has become the main thermal insulation of building energy-saving projects because of its characteristics of low thermal conductivity, high strength, light weight, etc., as well as the advantages of waterproof, moisture-proof, heat-resistant, and cold-resistant. One of the thermal materials. Rigid polyurethane foam is mainly prepared by the reaction of polymethylene polyphenyl polyisocyanate and polyether or polyester polyol under the synergistic catalysis of various additives. Compared with flexible polyurethane foam, it is mostly closed Porous structure, with a series of advantages such as good thermal insulation performance, good bonding...

AI Technical Summary

Problems solved by technology

Rigid polyurethane foam materials are used in buildings as thermal insulation materials for external protection structures. In developed countries in Europe and the United States, their consumption accounts for more than half of the total consumption of rigid foam. Although the thermal insulation materials used for external maintenance of buildings are increasing, they are far less common than those in developed countries in Europe and the United States, so their development potential is huge

[0003] One of the main factors hindering the application of rigid polyurethane foam in the field of building energy conservation is its flammability and poor fire safety. However, the commonly used additive flame retardants often increase the flame retardancy of rigid polyurethane foam. Its thermal conductivity makes its thermal insulation performance worse and is no longer suitable for the field of building energy conservation

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