High-flame-retardance polyisocyanurate hard foam and preparation method thereof

Abstract

The invention discloses a high-flame-retardance polyisocyanurate hard foam easy for industrialized production and a preparation method thereof. The high-flame-retardance polyisocyanurate hard foam is prepared from a white material and polyisocyanates according to a mass ratio of 1:1.2-1:1.8 at 10-30 DEG C by utilizing a polyurethane low-pressure foaming machine, wherein the white material employs at least one kind of polyester polyol, at least one kind of liquid fire retardants and a solid fire retardant coated with red phosphorus capable of being conveniently dispersed in the liquid raw material. The high-flame-retardance polyisocyanurate hard foam provided by the invention has excellent flame retardance with the oxygen index larger than 30, and also has good dimension stability and thermal insulation performance while with a relatively low density.

Description

technical field [0001] The invention relates to the field of polyisocyanurate rigid foam, in particular to a highly flame-retardant (oxygen index greater than 30, B1 grade) polyisocyanurate rigid foam material and a preparation method thereof. Background technique [0002] Extensive application of thermal insulation materials is an important way to improve energy utilization efficiency and reduce building energy consumption. Organic thermal insulation materials have attracted much attention in scientific research and industry because of their superior thermal insulation properties. Among the existing organic insulation materials, polyurethane insulation materials have small thermal conductivity, light density, high mechanical properties, good water resistance and aging resistance, and are widely used internationally. In recent years, polyurethane insulation materials have also been vigorously promoted in China, and the consumption has increased rapidly year by year. [000...

AI Technical Summary

Problems solved by technology

The system can reach an oxygen index of 33 or more, but the composite material has the disadvantage that the solid flame retardant is easy to settle. It is limited to the preparation in the laboratory mold and cannot be industrialized. Moreover, the reactive flame retardant containing bromine is used, which is poor in environmental protection.

Images