Phosphorus-containing nitrile/DOPO double-base structure phosphorus-containing fire retardant, preparation method of phosphorus-containing nitrile/DOPO double-base structure phosphorus-containing fire retardant, and flame-retardant epoxy resin prepared from phosphorus-containing nitrile/DOPO double-base structure phosphorus-containing fire retardant

Abstract

The invention relates to a phosphorus-containing fire retardant, a preparation method of the phosphorus-containing fire retardant and a flame-retardant epoxy resin prepared from the phosphorus-containing fire retardant, and especially relates to a phosphorus-containing nitrile/DOPO double-base structure phosphorus-containing fire retardant, a preparation method of the phosphorus-containing nitrile/DOPO double-base structure phosphorus-containing fire retardant, and flame-retardant epoxy resin prepared from the phosphorus-containing nitrile/DOPO double-base structure phosphorus-containing fire retardant. The flame-retardant epoxy resin solves the problem that the existing epoxy resin has low flame retardation efficiency and poor compatibility between a polymer matrix and a fire retardant. The preparation method comprises the following steps of 1, dissolving p-hydroxybenzaldehyde and tetrahydrofuran, adding triethylamine into the solution and carrying out stirring, 2, dissolving phosphonitrilic chloride trimer in tetrahydrofuran, dropwisely adding the solution into the reaction system, and carrying out heating and stirring, 3, cooling the reaction system, concentrating the filtrate, pouring the filtrate into water for precipitate separation, carrying out pumping filtration, carrying out recrystallization on the precipitates and carrying out drying to obtain intermediates, and 4, dissolving the intermediates by a solvent, adding p-aminophenol into the solution, carrying out heating reflux, adding DOPO into the reflux product, carrying out condensation, pouring the concentrate into cold ethanol for solid precipitation, and washing and drying the solids to obtain the phosphorus-containing nitrile/DOPO double-base structure phosphorus-containing fire retardant. The flame-retardant epoxy resin comprises epoxy resin, a curing agent and the phosphorus-containing nitrile/DOPO double-base structure phosphorus-containing fire retardant. The preparation method is used for preparing the phosphorus-containing nitrile/DOPO double-base structure phosphorus-containing fire retardant.

Description

technical field [0001] The invention relates to a phosphorus-containing flame retardant, a preparation method thereof and a flame-retardant epoxy resin using the phosphorus-containing flame retardant as a raw material. Background technique [0002] Polymer materials have excellent comprehensive properties and are widely used in aerospace, electronic appliances, automobile industry and other fields, but the flammability of polymer materials and the hazards of burning and releasing toxic gases hinder their wider application. Flame retardants are a class of functional additives that can impart flame retardancy to polymer materials. Halogenated flame retardants, especially bromine-containing flame retardants, have been widely used due to their high flame retardant efficiency and low price. However, when halogenated flame retardants are thermally cracked or burned, they will generate a lot of smoke and corrosive toxic gases, such as: polybrominated dibenzofurans, dioxins, etc. Ba...

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Problems solved by technology

[0004] The present invention aims to solve the problems of low flame retardant efficiency and poor compatibility between the polymer matrix and the flame retardant existing in the existing epox...

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