Flame-retarding compound, flame-retardant prepared thereby and preparation method thereof

Abstract

The invention discloses a flame-retarding compound, a flame-retardant prepared thereby and a preparation method thereof. The flame-retardant is prepared by the reaction of phthalimide, phosphonitrilicchloride trimer and 5, 5-dimethyl-1, 3-dioxaphosphorinan-2-amine and has the advantages of high phosphor content and high melting point; the heterocyclic phosphate ester is combined with cyclotriphosphazene, thus improving the molecular weight of the outcome and the compatibility with the polymer product. The flame retardant prepared by the flame-retarding compound is prepared by the reaction of a compound (I) and a polypropylene. The nitrogen content of the flame retardant is 13-15%, the phosphor content thereof is 23-25%, the flame retardant has good thermal stability, and high flame-retarding efficiency, contains no halogens, can be used for preparing flame-retarding macromolecule material, has low cost of raw material, simple and clean preparation process and has no pollution; and the flame retardant improves the flame-retarding performance of the material and affects the mechanic performance less simultaneously. The flame-retarding compound (I) has a structure shown as follow.

Description

technical field

[0001] The invention relates to a phosphorus-nitrogen expansion flame retardant compound, a flame retardant and their synthesis method. Background technique

[0002] Nowadays, polymer materials are widely used in all aspects of people's production and life, especially in construction, transportation, electronic appliances and daily products, which greatly increases the fire hazard caused by the flammability of such materials. This has led to an increasing demand for flame-retardant and fire-resistant materials worldwide. Many countries have formulated corresponding regulations and policies, which directly promote the research, development, production and application of flame-retardant chemicals.

[0003] In the new century, flame retardant research pays more attention to environmental protection issues. People hope that it will not only make the material have a higher flame retardant level, but also be low-toxic to humans, and will not cause secondary harm to...

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