Environment-friendly flame-retardant hard polyurethane foaming plastic

Abstract

The invention provides environment-friendly flame-retardant hard polyurethane foaming plastic. Polyisocyanates, polyether polyol, a foaming agent, a foam stabilizing agent, a catalyst, glycerinum and a flame retardant are taken as raw materials, wherein the flame retardant is synthesized novel halogen-free flame retardant 1-butyl-3-methylimidazole dibutyl ester ionic salt ([Bmim]DBP); the polyether polyol, the foaming agent, the foam stabilizing agent, the catalyst, the glycerinum and the flame retardant are uniformly stirred and mixed in a certain ratio at the room temperature in a high-speed dispersing machine, are further stirred and mixed uniformly with polyisocyanates added in a certain ratio, are subjected to foam molding in a mold, and are aged, so that the environment-friendly flame-retardant hard polyurethane foaming plastic can be obtained.

Description

【Technical field】 [0001] The invention relates to the technical field of foamed plastics, in particular to a flame-retardant rigid polyurethane foamed plastic. 【Background technique】 [0002] Polyurethane (PU) is the abbreviation of polyurethane, which is usually produced by polyaddition reaction of dibasic or polyvalent isocyanate and dibasic or polyvalent hydroxyl compound. Polyurethane products can be divided into foam products and non-foam products, and foam products can be divided into rigid, flexible and semi-rigid foams. Rigid polyurethane foam (RPUF) has excellent thermal insulation and thermal insulation properties, and can withstand a certain load without significant deformation. In addition, it has low density, high specific strength, high temperature resistance, good dimensional stability and With the advantages of good adhesion to other substrates, it is widely used in the fields of automobile industry, home appliance industry and construction industry. Howeve...

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Problems solved by technology

[0003] Although there are many studies devoted to improving the flame retardancy of rigid polyurethane foams, good results have also been achieved. For example, Chinese patent CN102875726, the oxygen index of the flame-retardant rigid polyurethane foams prepared by it can be increased to ≥ 30, but its The flame retardant used is composed of bromine and chlorine, which will release a large amount of toxic hydrogen halide gas when burned, and the addition of a large amount of flame retardant will have a great impact on the mechanical properties of the matrix material and increase the cost; there are also efforts to simultaneously Research on improving the flame retardancy and environmental protection of flame retardants, such as Chinese patent CN102432917A, which uses melamine-2-carboxyethylphenyl phosphinate and at least one compound of phosphate and phosphonate , although the use of this compound flame retardant can improve the flame retardancy and environmental protection of the material, but the melamine-2-carboxyethylphenyl phosphinate used has water absorption and is exposed to air Medium is easy to be affected by moisture, and if the purity is not high, it will easily cause the decomposition of highly toxic cyanide gas during combustion, while phosphate and phosphonate have the disadvantages of poor heat resistance, high volatility, and poor compatibility with the substrate , it is easy to cause pollution to the processing environment and the prepared material has poor stability and durability

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