Compounds containing phosphorus, nitrogen and transition metal elements, and preparation method thereof

Abstract

The invention discloses compounds containing phosphorus, nitrogen and transition metal elements. The compounds with the structure also contain transition metal with a catalytic flame-retardant effect besides phosphorus and nitrogen elements required in the traditional flame retardant. A method for preparing the compounds with the structure is simple; and the obtained product has higher yield, does not contain halogen, is environment-friendly, has high thermal decomposition temperature, and can be used for flame-retardant engineering plastic. A general structural formula of the compounds is shown in the following formula (I).

Description

technical field The invention relates to a design and preparation method of a novel ligand containing phosphorus and nitrogen elements and a chelated transition metal ion compound, in particular to a compound containing phosphorus, nitrogen and transition metal elements and a preparation method thereof. Background technique The currently used polymer material flame retardants are divided into physical flame retardant and chemical flame retardant according to their mechanism. The physical approach is to interfere with polymer combustion by cooling, diluting, and forming a thermal insulation layer; while the chemical approach is to change the degradation mode of the polymer by terminating the free radical chain reaction to achieve flame retardancy. In already commercialized flame retardants, such as Al(OH) 3 , Mg(OH) 2 etc. are flame retardants that belong to the physical route. They have the advantages of less smoke generation and no toxic gas, but they have the disadvanta...

AI Technical Summary

Problems solved by technology

Transition metal oxides are inorganic compounds, so their uniform dispersion in organic polymer materials is poor, and their applications are limited

Organic multidentate ligands enrich the types of transition metal chelates, but due to their poor thermal stability, they are easily decomposed during the processing of polymer materials, which reduces the efficiency of catalytic flame retardancy. burning effect