DOPO intumescent flame retardant as well as preparation method and application thereof

By developing DOPO expansion flame retardant containing P, N and S elements, using the reaction of aromatic aldehyde compounds and sulfonylhydrazides with DOPO, the problem of poor flame retardant effect of DOPO derivatives in polyolefin materials is solved, and the problem of poor flame retardant effect of DOPO derivatives in polyolefin materials is achieved. The effect of significantly improving flame retardant performance at a lower additive amount is suitable for flame retardant applications of polyolefin materials.

CN119192246APending Publication Date: 2024-12-27SHOUGUANG WEIDONG CHENGUAN CHEM CO LTD +1
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Patent Information

Application Number
CN202411547122.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-01
Publication Date
2024-12-27

AI Technical Summary

Technical Problem

Among polyolefin materials, the flame retardant effect based on DOPO derivatives is poor, and the addition amount is large and the cost is high, making it difficult to achieve excellent flame retardant performance at a lower addition amount.

Method used

A class of DOPO expansion flame retardant containing P, N and S elements was developed. Through the reaction of aromatic aldehyde compounds and sulfonylhydrazides and combined with DOPO, an expanded flame retardant with multi-element synergistic flame retardant effect was prepared. and achieve excellent flame retardant properties at lower additive amounts in polyolefin materials.

Benefits of technology

The DOPO expansion flame retardant can significantly improve the flame retardant performance of polyolefin materials at an additive amount of 15-20 wt%, which is much lower than the requirements of traditional DOPO-based expansion flame retardant, and the preparation method is simple and the raw material is cheap. Easy to obtain, suitable for flame retardant of polyolefin materials.

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Abstract

The invention relates to a DOPO intumescent flame retardant, the structural formula of which is as shown in formula I: wherein R1, R2, R3, R4 and R5 are independently selected from H, C1-6 alkyl, C2-6 alkenyl, C1-6 alkoxy, nitryl, hydroxyl and halogen; a is (CH2) n-aryl, and n is 0 or 1. The novel intumescent DOPO flame retardant is synthesized, has an N and P synergistic flame retardant effect, and can enable polyolefin to have a very good flame retardant effect under the condition of a relatively low addition amount. The preparation method of the DOPO intumescent flame retardant is simple, the raw materials are cheap and easy to obtain, and the DOPO intumescent flame retardant has excellent flame retardance and is particularly suitable for flame retardance of polyolefin materials.
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Citation Information

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