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High-tenacity flame-retardant bismaleimide resin and preparation method thereof

A technology of bismaleimide resin and bismaleimide, which is applied in the field of high-toughness flame-retardant bismaleimide resin and its preparation, can solve the problems affecting the molding process and the lack of resin flame retardancy , high viscosity of the prepolymer, etc., to improve the molding process, facilitate dispersion, and have good flame retardant properties

Inactive Publication Date: 2015-04-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are disadvantages such as high melting point, difficult processing, and high brittleness of the resin after curing; currently, it is commonly used to modify it by diallyl bisphenol A (DBA), and this BMI / DBA modified resin has a prepolymer Problems such as high viscosity and insufficient flame retardancy of the cured resin, and the addition of a large amount of additive-type flame retardants will affect its molding process and reduce its toughness

Method used

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  • High-tenacity flame-retardant bismaleimide resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: Add 0.01mol of O,O-bis(4-(hydroxy)phenyl)phenylphosphonate and 200ml of N,N-dimethylformamide into the three-necked flask, after dissolving, add 0.02mol of Sodium hydroxide or potassium carbonate, stirred at 30°C for 1.5h, added 0.025mol of allyl chloride, after 5h, washed with water, extracted with ethyl acetate, washed twice with distilled water, dried with anhydrous magnesium sulfate, Filtration, distillation, and removal of the organic solvent gave a pale yellow liquid O,O-bis(4-(allyloxy)phenyl)phenylphosphonate.

[0024] Step 2: Add 100 parts of diphenylmethane type bismaleimide, 20 parts of diallyl bisphenol A and 30 parts of bisphenol A diallyl ether into a beaker, and heat and melt at 80-160° C. , stir evenly, add 5 parts of O,O-bis(4-(allyloxy)phenyl)phenylphosphonate, after stirring evenly, pour it into a mold that has been preheated for more than 30 minutes, and put it into a 140- In a vacuum box at 160 °C, after defoaming, put it into a blast dryin...

Embodiment 2

[0026] Step 1: Add 0.01mol of O,O-bis(4-(hydroxy)phenyl)phenylphosphonate and 500ml of N,N-dimethylformamide into the three-necked flask, after dissolving, add 0.03mol of Sodium hydroxide or potassium carbonate, after stirring at 40°C for 2h, add 0.03mol of allyl chloride, after 6h, wash with water, extract with ethyl acetate, then wash twice with distilled water, dry with anhydrous magnesium sulfate, filter , Distillation, and remove the organic solvent to obtain light yellow liquid O,O-bis(4-(allyloxy)phenyl)phenylphosphonate.

[0027] Step 2: Add 100 parts of diphenylmethane type bismaleimide, 30 parts of diallyl bisphenol A and 40 parts of bisphenol A diallyl ether into a beaker, and heat and melt at 80-160° C. , stir evenly, add 7 parts of O,O-bis(4-(allyloxy)phenyl)phenylphosphonate, after stirring evenly, pour it into a mold that has been preheated for more than 30 minutes, and put it into a 140- In a vacuum box at 160 °C, after defoaming, put it into a blast drying bo...

Embodiment 3

[0029] Step 1: Add 0.01mol of O,O-bis(4-(hydroxy)phenyl)phenylphosphonate and 700ml of N,N-dimethylformamide into the three-necked flask, after dissolving, add 0.04mol of Sodium hydroxide or potassium carbonate, after stirring at 40°C for 3h, add 0.03mol of allyl chloride, after 7h, wash with water, extract with ethyl acetate, wash twice with distilled water, dry with anhydrous magnesium sulfate, filter , Distillation, and remove the organic solvent to obtain light yellow liquid O,O-bis(4-(allyloxy)phenyl)phenylphosphonate.

[0030]Step 2: Add 100 parts of diphenylmethane type bismaleimide, 30 parts of diallyl bisphenol A and 40 parts of bisphenol A diallyl ether into a beaker, and heat and melt at 80-160° C. , stir evenly, add 7 parts of O,O-bis(4-(allyloxy)phenyl)phenylphosphonate, after stirring evenly, pour it into a mold that has been preheated for more than 30 minutes, and put it into a 140- In a vacuum box at 160 °C, after defoaming, put it into a blast drying box for ...

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Abstract

The invention relates to a high-tenacity flame-retardant bismaleimide resin and a preparation method of the high-tenacity flame-retardant bismaleimide resin. The resin is composed of 100 parts of diphenylmethane bismaleimide, 1-100 parts of diallyl bisphenol A, 1-100 parts of bisphenol A diallyl ether, 1-50 parts of O,O-bis(4-(allyloxy) phenyl) phenyl phosphonic acid). Both the bisphenol A diallyl ether and the O,O-bis(4-(allyloxy) phenyl) phenyl phosphonic acid) undergo claisen rearrangement at a high temperature to be transformed into derivatives of diallyl and then participate in the curing reaction of the resin, and therefore the bisphenol A diallyl ether can effectively decrease the viscosity of a prepolymer at a low temperature and improve the forming process of the resin; phosphorus in the O,O-bis(4-(allyloxy) phenyl) phenyl phosphonic acid) can restrain combustion of the resin and make the resin generate a small amount of smoke without poisonous or corrosive gas in combustion, meets environmental requirements and has good compatibility with the resin.

Description

technical field [0001] The invention belongs to the field of advanced composite material science and technology, and in particular relates to a high-toughness flame-retardant bismaleimide resin and a preparation method thereof. Background technique [0002] Bismaleimide resin (BMI) is a high-performance resin with excellent heat and humidity resistance, chemical stability, and dimensional stability. It is widely used in aerospace, mechatronics, transportation and other industrial fields. However, there are disadvantages such as high melting point, difficult processing, and high brittleness of the cured resin; currently, it is commonly modified by diallyl bisphenol A (DBA), and this BMI / DBA modified resin has prepolymers The problems of high viscosity and insufficient flame retardancy of the cured resin, and the addition of a large amount of additive flame retardant will affect the molding process and reduce its toughness. Therefore, how to reduce the viscosity of BMI / DBA pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/12C07F9/40
Inventor 颜红侠冯书耀李婷婷刘天野
Owner NORTHWESTERN POLYTECHNICAL UNIV
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