Phosphorus-containing and nitrogen-containing expansion type flame-retardant polymer and preparation method thereof

Abstract

The invention discloses a phosphorus-containing and nitrogen-containing expansion type flame-retardant polymer and a preparation method thereof. The preparation method is characterized in that: the phosphorus-containing and nitrogen-containing expansion type flame-retardant polymer is prepared by solution polycondensation reaction or melt polycondensation reaction of diphosphorus acylchloride or diphosphorus acylbromide and a diamine functional group-containing compound. The expansion type flame-retardant polymer comprises phosphorus-containing and nitrogen-containing phosphamide with a structure unit formula shown in the specifications, wherein n is an integer of from 1 to 200; R1 is oxygen or sulphur; and R is alkoxy, alkylthio, aryloxy or arylthio. The product of the invention has high compatibility with a high molecular material matrix, difficult transfer and excellent durability. The preparation method has the advantages of simpleness, easy control, high yield, wide sources of the required raw materials and easy industrialized production. A high polymer with a flame-retardant function can be directly prepared, or the high polymer serving as a flame-retardant additive can be added into various polyesters, polyamide, polyolefin, epoxy resin, polystyrene, high impact polystyrene or acrylonitrile butadiene styrene (ABS) polymer.

Description

technical field The invention belongs to the technical field of halogen-free flame-retardant polymers, and in particular relates to phosphorus- and nitrogen-containing intumescent flame-retardant polymers and a preparation method thereof. Background technique Polymer materials have many advantages such as light weight, chemical corrosion resistance, easy processing and molding, wide operating temperature range, and high cost performance. They have been widely used in electronics, electrical appliances, construction and other fields and in daily life. However, because most polymer materials are composed of C, H, O and other elements, they are easy to burn and cause fires, which bring huge threats and losses to people's lives and property. At present, the industry mainly adopts the addition of halogen-containing flame retardants in the matrix of polymer materials to solve the problem of flammability of polymer materials. For example, some bromine-containing flame retardants ...

AI Technical Summary

Problems solved by technology

However, most intumescent flame retardants have the following disadvantages: first, their decomposition temperature is low, which cannot meet the processing requirements of some plastics; Permeation and precipitation reduce the flame retardancy and service life of the material

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