Flame-retardant bismaleimide resin

A technology of maleimide resin and bismaleimide, which is applied in the field of flame retardant polymer materials, can solve problems such as difficulty in meeting flame retardant requirements, and achieve the effect of excellent flame retardant performance

Inactive Publication Date: 2015-10-07
XIAN ORIGIN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

BMI's polymers emit CO when burned 2 , has a certain self-extinguishin...

Method used

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  • Flame-retardant bismaleimide resin
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  • Flame-retardant bismaleimide resin

Examples

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Embodiment 1

[0036] Embodiment 1: prepare the bismaleimide containing phosphaphenanthrene group

[0037] In this embodiment, the structural formula is The diphenylmethane bismaleimide is the bismaleimide of raw material preparation containing phosphaphenanthrene group, and the structural formula of the bismaleimide containing phosphaphenanthrene group of preparation is:

[0038]

[0039] The preparation method of the present embodiment comprises the following steps:

[0040] Step 1. Dissolve 10.0g DOPO in N,N-dimethylformamide to obtain 50mL DOPO solution;

[0041] Step 2: Add 16.6g of diphenylmethane bismaleimide and N,N-dimethylformamide into the reactor at a molar ratio of 1:10, stir evenly at 50°C under nitrogen protection, and then Add the DOPO solution described in step 1 dropwise to the reactor under constant temperature conditions, keep the temperature of the reaction system at 160° C. after the dropwise addition, and stir for 1 h; the drop rate of the DOPO solution is 1 mL / m...

Embodiment 2

[0045] Embodiment 2: prepare the bismaleimide containing phosphaphenanthrene group

[0046] In this embodiment, the structural formula is The 2,2-diphenylpropane bismaleimide is the bismaleimide containing phosphaphenanthrene group prepared as a raw material, and the structural formula of the prepared bismaleimide containing phosphaphenanthrene group is:

[0047]

[0048] The preparation method of the present embodiment comprises the following steps:

[0049] Step 1. Dissolve 10.0g DOPO in dimethyl sulfoxide to obtain 50mL DOPO solution;

[0050] Step 2: Add 21.3g of 2,2-diphenylpropane bismaleimide and dimethyl sulfoxide into the reactor at a molar ratio of 1:50, stir evenly at 90°C under nitrogen protection, and then Add the DOPO solution described in step 1 dropwise to the reactor at a constant temperature, keep the temperature of the reaction system at 90°C after the dropwise addition, and stir for 5 hours; the drop rate of the DOPO solution is 3mL / min;

[0051] Ste...

Embodiment 3

[0054] Embodiment 3: prepare the bismaleimide containing phosphaphenanthrene group

[0055] In this embodiment, the structural formula is The benzophenone bismaleimide is the bismaleimide of raw material preparation containing phosphaphenanthrene group, and the structural formula of the bismaleimide containing phosphaphenanthrene group of preparation is:

[0056]

[0057] The preparation method of the present embodiment comprises the following steps:

[0058] Step 1. Dissolve 10.0g DOPO in acetone to obtain 50mL DOPO solution;

[0059] Step 2. Add 25.67g of benzophenone bismaleimide and 1,3-dimethyl-2-imidazolidinone into the reactor at a molar ratio of 1:30), under nitrogen protection, at 120°C Stir evenly under the same conditions, then add the DOPO solution described in step 1 dropwise to the reactor under constant temperature conditions, keep the temperature of the reaction system at 140°C after the dropwise addition, and stir for 3 hours; the drop rate of the DOPO s...

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Abstract

The invention discloses a flame-retardant bismaleimide resin. The resin is prepared by uniformly mixing bismaleimide, an allyl compound and phosphaphenanthrene-group-containing bismaleimide according to a mass ratio of 100: (1-100): (1-50) and then carrying out curing. The flame-retardant bismaleimide resin provided by the invention is prepared by blending and curing phosphaphenanthrene-group-containing bismaleimide, bismaleimide and the allyl compound, and has the advantages of heat resistance, electric insulation performance, weather resistance and excellent flame retardant property. The flame-retardant bismaleimide resin in the invention has a thermal weight loss temperature of greater than 410 DEG C and a limit oxygen index (LOI) of 32% to 40% and reaches the fire rating of UL94V-0.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant polymer materials, and in particular relates to a flame-retardant bismaleimide resin. Background technique [0002] Bismaleimide resin (BMI) is a kind of bifunctional compound with double bond active groups, which has excellent heat resistance, electrical insulation, wave transparency, radiation resistance, flame retardancy, weather resistance, Good mechanical properties and dimensional stability. The bismaleimide resin molding process is similar to epoxy resin, and is widely used in the resin matrix of advanced composite materials, high temperature resistant insulating materials and adhesives in aviation, aerospace, machinery, electronics and other industrial fields. [0003] With the development of modern science and technology, the requirements for flame retardancy and self-extinguishing properties of polymer materials are getting higher and higher. BMI's polymers emit CO when burned ...

Claims

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Application Information

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IPC IPC(8): C08G73/12
Inventor 李文刘卫涛王宪沛张立龙雷东卫李小安李潇张辉辉闫俊
Owner XIAN ORIGIN CHEM TECH
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