Expanding fire retardant composition without halide for polyolefine

Abstract

The fire retardant composition consists of pentaerythritol phosphate 18-54 wt%, melamine polyphosphate 40-80 wt%, stearic acid or zinc stearate 0.1-5 wt%, coupling agent 0.1-5 wt% and stuffing 0.1-5 wt%. It is used as fire retardant for polypropylene powder or grains, and when the addition amount is 28 wt% fireproof level of UL94V-0 is reached; and is also used as fire retardant for polyethylene,and when the addition amount is 30 wt% fireproof level of UL94V-0 is reached.

Description

(1) Technical field [0001] The invention relates to a halogen-free intumescent flame retardant composition for polyolefin. (2) Background technology [0002] Halogen-based (emphasis is bromine-based) flame retardants are currently the world's largest organic flame retardants for polyolefins. They occupy a dominant position in the field of flame retardants due to their small additions and significant flame retardant effects. Halogen-based flame retardant systems play a flame retardant role mainly by degrading to produce hydrogen halide gas or metal halides. These compounds also increase the generation of toxic and shielding gases in fires. In addition, some data show that some brominated aromatic hydrocarbon flame retardants (such as decabromodiphenyl ether) produce highly toxic brominated dibenzoxane and brominated dibenzofuran when burned. Therefore, people are increasingly cautious about the use of halogenated flame retardants, and some countries have even formulated rele...

AI Technical Summary

Problems solved by technology

In addition, some data show that some brominated aromatic hydrocarbon flame retardants (such as decabromodiphenyl ether) produce highly toxic brominated dibenzoxanes and brominated dibenzofurans when burned

Therefore, people are increasingly cautious about the use of halogenated flame retardants, and some countries have even formulated relevant regulations to restrict their use