Environment-friendly phosphor-nitrogen single-component expansion type flame retardant and preparation method thereof

Abstract

The invention discloses an environment-friendly phosphor-nitrogen single-component expansion type flame retardant and a preparation method thereof. The environment-friendly phosphor-nitrogen single-component expansion type flame retardant takes a dehydrating agent as an acid source, and takes a nitrogen-containing foaming agent as a gas source and takes a char-forming agent as a carbon source, and chemical reaction is performed in an organic solvent to synthesize a three-dimensional macromolecular structure. The environment-friendly phosphor-nitrogen single-component expansion type flame retardant effectively overcomes the defects that a micromolecule expansion type flame retardant is liable to migrate, is liable to absorb humidity, is poor in compatibility with polymer matrix and the like, does not contain halogen, is small in environmental pollution; and the environment-friendly phosphor-nitrogen single-component expansion type flame retardant which integrates the carbon source, the acid source and the gas source can meet requirements, on high-performance flame retardant, of people, and also can simplify a feeding process in a processing process, and saves cost; and the production process is simple and easy to control, is relatively low in requirement on production equipment and is relativley high in yield.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to an environmentally friendly phosphorus-nitrogen single-component intumescent flame retardant and a preparation method thereof. Background technique [0002] Most of the flame retardants currently used in my country are traditional flame retardants. Although traditional inorganic flame retardants and halogenated flame retardants have high flame retardant efficiency and wide application range, most of them require high dosage and cause serious Metal contamination also has obvious adverse effects on the mechanical and physical properties of the substrate. The demand for high-efficiency flame retardants in modern society is becoming more and more significant. [0003] Compared with inorganic flame retardants and halogen flame retardants, phosphorus-containing flame retardants have very obvious advantages, such as low price, non-toxic, metal-free, and wide applic...

AI Technical Summary

Problems solved by technology

For example, CN102020842A discloses a phosphorus-nitrogen composite expansion type active flame retardant modified epoxy resin and its preparation method and application; CN105778263A discloses a kind of synergistic expansion flame-retardant polyolefin elastomer cable material and its preparation method; the above-mentioned patent application Although the use of compound phosphorus-nitrogen intumescent flame retardants has achieved good results, this type of flame retardants has the disadvantages of not lasting flame retardancy and greater damage to the mechanical properties of the matrix, and the flame retardancy effect is comparable to that of flame retardancy. The addition amount of the agent has a great relationship, and it must reach a certain proportion of the addition amount to produce a better flame retardant effect; in addition, the compound phosphorus-nitrogen intumescent flame retardant must match the polymer type, In order to effectively produce the best flame retardant effect on the substrate