Composition for preparing highly fire-resistant polyisocyanurate foam

Abstract

The invention discloses a composition for preparing highly fire-resistant polyisocyanurate foam. Based on the total quantity of the composition, the composition comprises the following components in percentage by weight: 30-60 percent of polyester polyol and / or polylol containing tri-(2-ethoxyl) isocyanurate units, 0-7 percent of polyether polyol, 0-7 percent of low molecular weight polylol or polyamine containing active hydrogen atoms, 3-35 percent of reactive flame retardant, 1-15 percent of solid flame retardant, 0-30 percent of liquid organic flame retardant, 0.2-2 percent of water, 1-4 percent of catalyst, 0.5-3 percent of foam stabilizer and 10-25 percent of physical foaming agent. Compared with a conventional PIR (Polyisocyanurate) composition, the composition system has the advantages of stability in material foaming rise, good cohesiveness of foam with plane materials, and the like. Compared with conventional polyurethane foam and PIR foam, foam prepared from the composition system has the advantages of excellent flame resistance and good compressive strength and dimensional stability.

Description

technical field [0001] The invention relates to a combination material used in the field of foam materials, especially a combination material for thermal insulation foam plastics with high requirements for flame retardancy, specifically a method for preparing polyisocyanuric acid with high flame retardancy Composite material for ester foam. Background technique [0002] Due to its low thermal conductivity, high specific strength, light weight, and chemical corrosion resistance, rigid polyurethane foam has received more and more applications and attention in the fields of construction, heat preservation, transportation, and insulation. However, as an organic polymer material, rigid polyurethane foam, like other organic substances, has the objective fact that it is easy to burn in a flame. As social and government policies and regulations have higher and higher requirements for the flame retardancy of energy-saving thermal insulation materials, it is urgent to improve the fla...

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Problems solved by technology

However, its thermal conductivity is high and its dimensional stability is poor, so it is difficult to meet the performance requirements of building exterior wall insulation materials in national standards.

[0007] In the patent CN88104247.1, the method of increasing the isocyanate index in the formula is adopted to increase the isocyanate index to more than 750, and the flame retardancy of the prepared foam is improved, but the oxygen index is still less than 28%.

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