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High-toughness and low-viscosity benzoxazine/diallyl diphenol/bismaleimide blended resin and preparation method thereof

A technology of bismaleimide and diallyl diphenol, applied in the field of benzoxazine/diallyl diphenol/bismaleimide blend resin and its preparation, to improve processing flow properties, improved heat resistance, and good toughness

Active Publication Date: 2017-01-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they all involve modification reports that take into account the toughness and processability of Shuangma

Method used

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  • High-toughness and low-viscosity benzoxazine/diallyl diphenol/bismaleimide blended resin and preparation method thereof
  • High-toughness and low-viscosity benzoxazine/diallyl diphenol/bismaleimide blended resin and preparation method thereof
  • High-toughness and low-viscosity benzoxazine/diallyl diphenol/bismaleimide blended resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 0.87 mol of diallyl biphenol (DABP) and stir in a three-necked flask. When the temperature rises to about 125°C, add 1 mol of N,N'-4,4'-diphenylmethane bismaleoyl imine (BDM), stir until BDM and DABP are evenly mixed, add 1mol diphenylmethane diamine type benzoxazine (BOZ), and continue to stir for 30 minutes, pour the blend into a mold while it is hot, and put Put it into a vacuum oven at 115° C. for vacuum defoaming for about 4 hours to obtain a blended resin cast body. Then transfer the mold to a temperature-programmed oven for curing. The curing temperature and time are 130°C / 2 hours+150°C / 2 hours+170°C / 2 hours+190°C / 2 hours+200°C / 6 hours. Cool to room temperature to obtain a solidified sample.

[0041] According to the GB / T 1843-2008 standard, the average value of the unnotched impact strength of the sample is 17.3KJ m -2 , the specific performance data are shown in Table 1.

Embodiment 2

[0043] Weigh 0.87 mol of diallyl biphenol (DABP) and stir in a three-necked flask. When the temperature rises to about 120°C, add 2 mol of N,N'-4,4'-diphenylmethane bismaleoyl imine (BDM), stir until BDM and DABP are evenly mixed, add 1mol diphenylmethane diamine type benzoxazine (BOZ), and continue to stir for 50 minutes, pour the blend into a mold while it is hot, and put Put it into a vacuum oven at 120° C. for vacuum defoaming for about 4 hours to obtain a blended resin cast body. Then transfer the mold to a temperature-programmed oven for curing. The curing temperature and time are 130°C / 2 hours+150°C / 2 hours+170°C / 2 hours+190°C / 2 hours+200°C / 6 hours. Cool to room temperature to obtain a solidified sample.

[0044] According to the GB / T 1843-2008 standard, the average value of the unnotched impact strength of the sample is 15.1KJ m -2 , the specific performance data are shown in Table 1.

Embodiment 3

[0046] Weigh 0.87 mol of diallyl biphenol (DABP) and stir in a three-necked flask. When the temperature rises to about 125°C, add 1 mol of N,N'-4,4'-diphenylmethane bismaleoyl imine (BDM), stir until BDM and DABP are evenly mixed, add 2mol diphenylmethane diamine type benzoxazine (BOZ), and continue to stir for 40 minutes, pour the blend into a mold while it is hot, and put Put it into a vacuum oven at 120° C. for vacuum defoaming for about 4 hours to obtain a blended resin cast body. Then transfer the mold to a temperature-programmed oven for curing. The curing temperature and time are 130°C / 2 hours+150°C / 2 hours+170°C / 2 hours+190°C / 2 hours+200°C / 6 hours. Cool to room temperature to obtain a solidified sample.

[0047] According to the GB / T 1843-2008 standard, the average value of the unnotched impact strength of the sample is 16.3KJ m -2 , the specific performance data are shown in Table 1.

[0048] Table 1 lists the bismaleimide (BDM) blended resin curing specimens witho...

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Abstract

The invention belongs to the field of high polymer materials, and relates to a high-toughness and low-viscosity benzoxazine / diallyl diphenol / bismaleimide blended resin and a preparation method thereof. The method includes the steps that 100 parts of bismaleimide, 60-95 parts of diallyl diphenol and 10-500 parts of benzoxazine are dissolved with a polar organic solvent, solution blending or melt blending is carried out at 105-125 DEG C to prepare a blended resin casting body through a vacuum defoaming method, heating curing is carried out at 120-200 DEG C for 1-20 h, and cured benzoxazine and diallyl diphenol toughening-modified bismaleimide blended resin is obtained. The bismaleimide blended resin has excellent heat resistance and toughness and good processability and can serve as matrix resin for preparing high-temperature-resistant and high-performance resin-based fiber reinforced composite materials.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a high-toughness, low-viscosity benzoxazine / diallyl diphenol / bismaleimide blended resin and a preparation method thereof. Background technique [0002] Bismaleimide resin (BMI for short) is a thermosetting resin derived from polyimide resin system. bonded bifunctional compounds. BMI monomers can undergo self-polymerization under thermal initiation or catalytic conditions, and can form a cross-linked network structure. As a commonly used thermosetting resin, bismaleimide resin has good mechanical properties, weather resistance, radiation resistance, electrical insulation and excellent heat resistance under high-altitude environmental conditions, so bismaleimide resin is used as a This kind of composite material matrix resin is widely used in aerospace, automobile, electronics and other fields; in addition, due to its electrical insulation and chemical stability, it is al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L79/04C08G73/12C08G73/06
Inventor 蹇锡高刘程王锦艳张守海
Owner DALIAN UNIV OF TECH
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