Trine expansion type flame retardant and synthetic method thereof

Abstract

The invention relates to a trine expansion type flame retardant and a synthetic method thereof. The synthetic method is characterized by comprising the following steps: adding a solvent into a container, adding cyanuric chloride and 1-oxyphospha-4-hydroxymethyl-2,6,7-trioxabicyclo[2.2.2] octane into the container, cooling to 0-45 DEG C in water bath or oil bath and stirring and dispersing, dropwise adding an acid-binding agent to react step by step, thereby obtaining unary substitute; adding matters containing aliphatic diamine or aliphatic dihydric alcohol and a mixture of the solvent and the acid-binding agent into another container, cooling to -10 to 10 DEG C in ice bath or a freezing reactor, slowly dropwise adding a phosphorus-containing compound to react, thereby obtaining phosphorus-containing intermediate; adding the obtained unary substitute (CNC-PEPA) and the obtained phosphorus-containing intermediate into a reaction container with the solvent, dropwise adding the acid-binding agent, heating to 80-130 DEG C to react, cooling, washing and drying to obtain powder solid, namely the trine expansion type flame retardant. The trine expansion type flame retardant has the advantages of being great in molecular weight, relatively moderate in proportion of an acid source, a carbon source and a gas source in a molecular structure, relatively high in char forming content, relatively good in thermal stability and the like.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly halogen-free flame retardant products. Specifically, the invention relates to a "trinity" intumescent flame retardant containing caged phosphate, a triazine structure and a benzene ring structure and a synthesis method thereof. Background technique [0002] Polymer materials are widely used in people's production and life, which brings great convenience. However, since most polymer materials are flammable materials, their use in places with flame retardant requirements is greatly limited. Therefore, flame retardant modification has become one of the important contents of polymer material modification. [0003] Halogen-containing flame retardants, especially bromine-containing flame retardants, when compounded with antimony trioxide, have a good flame-retardant effect on polymer materials. However, this type of flame retardant will release a large amount of toxic and harmful substance...

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Problems solved by technology

[0016] Patent CN105968410A is an intumescent flame retardant containing polyhydroxyl and phosphorus-based triazine rings, which has a good flame-retardant effect on polypropylene, but the flame retardant contains many hydroxyl groups and has high moisture absorption, which will affect the subsequent use of composite materials. have a certain impact

[0017] These patents and synthesis methods have the following problems to varying degrees: the ratio of acid source-carbon source and gas source is not suitable, the flame retardancy needs to be further improved, or there are too many polar groups, resulting in excessive moisture absorption, Affect the use of subsequent composite materials

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