Synthesis technology of halogen-free high-poly type phosphate flame retardant

Abstract

The invention provides a synthesis technology of halogen-free high-poly type phosphate flame retardant, which comprises the steps of: carrying out reaction in a high pressure reaction kettle to generate intermediate by taking phosphorus oxychloride, ammonia water, phosphorus pentoxide, pentaerythritol and melamine as raw materials; 2) carrying out a reaction on the intermediate and diammonium hydrogen phosphate, polyvinyl alcohol, urea as well as 201type polyether polyol in the presence of an initiator; and finally, obtaining the product. The technology can be used for synthesizing high-poly type phosphate under the conditions of high temperature and high pressure; compared with the traditional high-temperature atmospheric technology, the synthesis technology improves the yield by more than 50%; the synthesis technology is simple in technology and convenient in control of the reaction process; and the obtained halogen-free high-poly type phosphate flame retardant is non-toxic, has the smoke suppression function, and is non-corroding, stable for heat and ultraviolet ray and good in flame retardant effect, thus being mainly used as high polymer material flame retardant.

Description

technical field

[0001] The invention relates to a synthesis process of a polymer, in particular to a synthesis process of a halogen-free high polyphosphate flame retardant. Background technique

[0002] At present, the development of flame retardants in the world shows the trend of non-halogenated, composite, harmless or low-harm and low-smoke. Polyphosphate flame retardant is one of the phosphorus-nitrogen flame retardants developed rapidly in recent years. It has excellent flame retardant effect, good compatibility with polymers, water resistance, solvent resistance, smokeless and low toxicity. , good dispersion, long-lasting flame retardant performance, compared with traditional halogen flame retardants and inorganic flame retardants, phosphorus nitrogen flame retardants are non-toxic, smoke suppression, non-corrosive, stable to heat and ultraviolet rays, flame retardant Good effect and other advantages. Chinese patent CN 101328269A discloses a preparation method of a p...