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Reactive flame retardant for epoxy resin as well as preparation method and application of reactive flame retardant

A technology of reactive flame retardant and epoxy resin, which is applied in the field of polymer flame retardants, can solve the problems of epoxy resin transparency and unsatisfactory mechanical properties, and achieve good flame retardant stability, good transparency and mechanical properties. performance effect

Active Publication Date: 2021-02-02
HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor reactivity of the existing reactive flame retardants, their flame retardancy and other properties need to be further improved, and when applied to epoxy resins, the quality of epoxy resins such as transparency and mechanical properties is not ideal.

Method used

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  • Reactive flame retardant for epoxy resin as well as preparation method and application of reactive flame retardant
  • Reactive flame retardant for epoxy resin as well as preparation method and application of reactive flame retardant
  • Reactive flame retardant for epoxy resin as well as preparation method and application of reactive flame retardant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The reactive flame retardant provided in this example is the second synthetic product prepared as follows:

[0032] Under nitrogen protection, 21.60g (0.10mol) DOPO, 26.67g (0.20mol) anhydrous aluminum trichloride, 300mL dichloromethane are added in the there-necked flask, and the first solution is obtained after mixing uniformly; Slowly add a mixed solution of 12.00g (0.12mol) of succinic anhydride and absolute ethanol dropwise in the first solution, after the dropwise addition is completed, the first mixed system is obtained; the first mixed system is slowly warmed up to 50°C, and the reaction is continued with stirring for 3 Hours later, cool to room temperature, collect the filtrate by suction filtration, wash the filtrate with acetone, then remove the solvent by rotary evaporation and dry in vacuo to obtain the first synthetic product (DOPO-SAA), with a yield of 72.43%;

[0033] Under nitrogen protection, 2.30g (0.02mol) of 2,4-diaminothiazole, 7.67g (0.04mol) of E...

Embodiment 2

[0035] The reactive flame retardant provided in this example is the second synthetic product prepared as follows:

[0036] Under the protection of nitrogen, 21.60g (0.10mol) DOPO, 33.33g (0.25mol) anhydrous aluminum trichloride, 200mL nitrobenzene were added into the three-necked flask, and the first solution obtained after mixing evenly; under stirring in an ice-water bath, Slowly add a mixture of 15.00g (0.15mol) of succinic anhydride and absolute ethanol dropwise to the first solution. After the dropwise addition is completed, the first mixed system is obtained; the temperature of the first mixed system is slowly raised to 40°C, and the reaction is continued with stirring After 5 hours, cool to room temperature, collect the filtrate by suction filtration, wash the filtrate with acetone, then remove the solvent by rotary evaporation and dry in vacuo to obtain the first synthetic product (DOPO-SAA), with a yield of 78.9%;

[0037] Under nitrogen protection, 2.30g (0.02mol) of...

Embodiment 3

[0039] The reactive flame retardant provided in this example is the second synthetic product prepared as follows:

[0040] Under the protection of nitrogen, 21.60g (0.10mol) DOPO, 35.16g (0.30mol) anhydrous boron trichloride, 300mL dichloromethane were added in the three-necked flask, and the first solution was obtained after mixing uniformly; Slowly add a mixed solution of 10.00g (0.10mol) of succinic anhydride and absolute ethanol dropwise in the first solution, after the dropwise addition is completed, the first mixed system is obtained; the first mixed system is slowly warmed up to 60°C, and the reaction is continued with stirring 2 Hours later, cool to room temperature, collect the filtrate by suction filtration, wash the filtrate with acetone, remove the solvent by rotary evaporation and dry in vacuo to obtain the first synthetic product (DOPO-SAA), with a yield of 74.82%;

[0041] Under nitrogen protection, 2.30g (0.02mol) of 2,4-diaminothiazole, 5.75g (0.03mol) of EDCl...

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Abstract

The invention provides a reactive flame retardant for epoxy resin as well as a preparation method and application of the reactive flame retardant. The reactive flame retardant comprises a first synthetic product obtained by reacting 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide with succinic anhydride, and a second synthetic product obtained by reacting the 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide with 2,4-diaminothiazole. The flame retardant provided by the invention can effectively improve the flame retardant property of the epoxy resin, and can enable the epoxy resin to maintain good transparency and mechanical properties.

Description

technical field [0001] The invention relates to a polymer flame retardant, in particular to a reactive flame retardant used for epoxy resin and its preparation method and application. Background technique [0002] Resin materials are widely used, such as epoxy resin, which has excellent adhesion, electrical insulation, chemical stability and mechanical properties, and is widely used in transportation, aerospace, integrated circuits and other fields. However, the limiting oxygen index (LOI) of general-purpose epoxy resin is usually only about 20%, which is easy to burn, and it can continue to burn after a fire and has a huge amount of smoke, which has serious safety problems, so these disadvantages limit the its application. [0003] Directly adding additive flame retardants (including organic flame retardants and inorganic flame retardants) to epoxy resin can improve its flame retardancy to a certain extent, however, the addition of additive flame retardants is often large,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/44C07F9/6574
CPCC08G59/44C07F9/657172
Inventor 胡丹钱建华谢廷鑫付建辉黄锐朱筱燕施佳盛吕晓平刘坐镇
Owner HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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