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Preparation and using method of cyclophosphazene flame retardant

A flame retardant, cyclophosphazene technology, applied in chemical instruments and methods, compounds of Group 5/15 elements of the periodic table, organic chemistry, etc., can solve problems such as poor compatibility and reduce the impact of mechanical properties , the effect of reducing costs and simple experimental steps

Inactive Publication Date: 2018-07-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the defect of poor compatibility between additive flame retardants and materials, the present invention synthesized a kind of additive cyclophosphazene flame retardant with good compatibility with PET and PBT materials

Method used

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  • Preparation and using method of cyclophosphazene flame retardant
  • Preparation and using method of cyclophosphazene flame retardant

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Add 1 mol of hexachlorocyclotriphosphazene and 7 mol of ethyl p-hydroxybenzoate into the three-port reactor, then add 100 ml of tetrahydrofuran and 7 mol of anhydrous potassium carbonate, and react at 60°C for 36 hours; dilute the obtained product with deionized water , a white precipitate appeared, filtered by suction, washed with deionized water and purified, washed twice with ethanol, and dried in vacuum to obtain product Ⅰ with a yield of 89%.

Embodiment 2

[0019] Add 1 mol of hexachlorocyclotriphosphazene and 7 mol of ethyl p-hydroxybenzoate into the three-port reactor, then add 100 mol of tetrahydrofuran and 7 mol of anhydrous potassium carbonate, and react at 70°C for 26 hours; dilute the obtained product with deionized water , a white precipitate appeared, filtered by suction, washed with deionized water and purified, washed twice with ethanol, and dried in vacuum to obtain product Ⅰ with a yield of 88%.

Embodiment 3

[0021] Melt and mix 100g of epoxy resin and 5g of prepared cyclophosphazene flame retardant, add 8.5g of ethylenediamine as curing agent, pre-cure at 60°C for 1h, cure at 80°C for 2h, and post-cure at 100°C for 1h. The test parameters of the modified epoxy resin are: the limiting oxygen index is 27.3%, the combustion grade is UL94V-1, and the impact strength is 9.55KJ / m 2 , the initial decomposition temperature is 323°C, and the residual carbon rate at 750°C is 13.98%.

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Abstract

The invention relates to a preparation and using method of a cyclophosphazene flame retardant. A cyclophosphazene flame retardant is modified by ester groups, and the cyclophosphazene flame retardanthas good compatibility with polythylene terephthalate (PET) and polybutylene terephthalate (PBT) materials according to the theory of like dissolves like. The technical scheme adopted by the inventionis as follows: side group functionalization is carried out on hexachlorocyclotriphosphazene through a one-step method for synthesizing hexakis(p-ethyl acetate phenoxyl)cyclophosphazene. According tothe invention, flame retardant modification is carried out on epoxy resin, PET and PBT through the cyclophosphazene flame retardant. The limit oxygen index of the modified epoxy resin is in a range of27.3%-29.5%, the flame retardant rating of modified PET is UL94V-0, the limit oxygen index of modified PET is in a range of 22.5%-25.8%, and the flame-retardant rating of modified PET is UL94V-1.

Description

technical field [0001] The invention discloses a cyclophosphazene flame retardant, and the cyclophosphazene flame retardant is synthesized by replacing the cyclophosphazene with ethyl p-hydroxybenzoate. The cyclophosphazene flame retardant is compatible with PET, PBT and other materials. It has good performance and achieves flame retardant effect without affecting the mechanical properties of organic polymer materials. As an additive flame retardant, the cyclophosphazene flame retardant is low in cost, convenient to use, highly efficient in flame retardancy, non-toxic and environmentally friendly, and can be industrialized. Background technique [0002] By substituting a strong nucleophile with a side group of hexachlorocyclotriphosphazene, reactive cyclophosphazene derivatives can be synthesized. These cyclotriphosphazenes have a high content of phosphorus nitrogen flame retardant elements, but most of the additive cyclophosphazenes Phosphazene flame retardants have poor c...

Claims

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Application Information

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IPC IPC(8): C07F9/6581C08L63/00C08L67/02C08K5/5399
Inventor 王秀芬耿婷婷杨立鹏蔡喜梅李双联
Owner BEIJING UNIV OF CHEM TECH
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