A polymethacrylimide foam with low smoke, low toxicity and high flame retardancy

Abstract

The invention discloses a polymethacrylimide (PMI) foam material with low smoke, low toxicity and high flame retardancy. body, flame retardant system, foaming agent, nucleating agent, initiator and crosslinking agent are mixed to obtain a mixed solution, which is obtained by polymerization and foaming. The mass fraction of the flame retardant system in the mixed solution is 10wt ~40wt%, the present invention finally obtains excellent mechanical properties and excellent flame retardant properties by adding a flame retardant system to the molding raw materials of the PMI foam material, which can be extinguished immediately (within 2s), and has a Very low smoke density and smoke toxicity, it is a low smoke, low toxicity and high flame retardant PMI foam material.

Description

technical field [0001] The invention relates to a polymethacrylimide (PMI) foam material with low smoke, low toxicity and high flame retardancy, belonging to the technical field of foam material preparation. Background technique [0002] With the development of technology, composite materials based on organic polymer materials have been widely used in aerospace, wind power equipment, automobile manufacturing, rail transit and other fields. The vast majority of organic polymer materials are flammable, and when burned, they generate large amounts of heat, high temperature, fast burning speed, and are prone to produce a large amount of toxic smoke. Once a fire breaks out, it will bring great difficulties to fire rescue work, often causing a large number of casualties and property losses. Therefore, in order to ensure the safety of people's lives and property, Flame retardancy of materials is very important. [0003] Polymethacrylimide (PMI) foam material was first developed b...

AI Technical Summary

Problems solved by technology

[0004] The PMI foam material itself is flammable, so it is of great significance to promote the development of flame-retardant PMI foam materials. A lot of research and development work has been done on the flame-retardant of PMI foam materials at home and abroad. However, the flame-retardant effect of PMI flame-retardant products on the market is not It is not very ideal, and the addition of halogen-containing flame retardants will cause the foam material to release highly toxic smoke when burning; adding phosphorus-containing flame retardants will significantly reduce the strength of PMI foam materials due to plasticization, and the temperature resistance Sexual deterioration