Unimolecular phosphorus-silicon-nitrogen intumescent flame retardant and preparation method thereof

Abstract

The invention discloses a unimolecular phosphorus-silicon-nitrogen intumescent flame retardant and a preparation method thereof, and relates to a flame retardant and a preparation method thereof. The flame retardant has the structural formula shown in the specifications; compared with the conventional flame retardant, the flame retardant has the advantages that the flame retardant does not contain halogen and contains three elements of the intumescent flame retardant, and 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phospha-phenantbrene-10-oxide which does not contain a phosphate structure is used as an acid source; and the flame retardant is high in flame retardant property and is non-toxic, does not absorb water easily, contributes to environment friendliness, and has good application prospect.

Description

technical field The invention relates to a flame retardant and a preparation method thereof, in particular to a phosphorus-silicon-nitrogen expansion type flame retardant and a preparation method thereof. Background technique Flame retardants are one of the important additives in polymer processing. Although traditional halogen-containing flame retardants have superior flame retardant properties, their applications in many fields are limited due to the release of a large amount of toxic and corrosive gases when burned. With the enhancement of people's awareness of environmental protection, the development of efficient and environmentally friendly halogen-free flame retardants is the main trend of today's flame retardant research and development. Intumescent flame retardant is a compound flame retardant, which has various flame retardant elements such as phosphorus and nitrogen, and provides acid source, carbon source and gas source. When heated, the flame retardant elements...

AI Technical Summary

Problems solved by technology

However, the above-mentioned research invention involves a flame retardant system, which generally only contains two flame retardant components, phosphorus and nitrogen. The flame retardant effect is good, but the synthesis method is relatively complicated, and many existing flame retardant products are easy to absorb water, difficult to store, and compatible. gender issues