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Modified bismaleimide resin and preparation method thereof

A bismaleimide resin and bismaleimide technology, applied in the field of composite materials, can solve the toughening instability of thermosetting resins, the uncontrollable degree of siloxane hydrolysis, and the rapid growth rate of resin viscosity, etc. problems, to achieve the effect of comprehensive performance improvement, good solvent solubility and reactivity, and low melt viscosity

Inactive Publication Date: 2012-11-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The preparation methods of hyperbranched siloxane-modified thermosetting resins disclosed in the existing literature all have problems such as excessively fast growth of resin viscosity, which makes the reaction difficult to control.
Soochow University, Gu Aijuan and others have disclosed patent applications about hyperbranched polysiloxane modified bismaleimide resins. Although these works have confirmed that hyperbranched polysiloxane has an effect on the toughening of thermosetting resins, its silicon The uncontrollable degree of hydrolysis of oxane leads to uncontrollable reaction degree, and there are defects such as instability in the toughening of thermosetting resins

Method used

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  • Modified bismaleimide resin and preparation method thereof
  • Modified bismaleimide resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Put 100g of N,N'-4,4'-diphenylmethane bismaleimide, 43g of diallyl bisphenol A and 6.3g of N-(β-aminoethyl)-γ-aminopropyl Stir and mix evenly at room temperature, raise the temperature to 50°C, and react in this environment for 90 minutes; raise the temperature to 140°C, and react for 40 minutes under the condition of stirring, and obtain a modified permanent bismaleimide resin.

[0018] After the above modified bismaleimide resin is cured at 140°C / 2h, 160°C / h, 180°C / 2h and 200°C / 2h and post-cured at 240°C / 4h, the modified bismaleimide resin is obtained. Imide cured resin.

Embodiment 2

[0029] Put 100g of N,N'-4,4'-diphenylmethane bismaleimide, 43g of diallyl bisphenol A and 6.3g of N-(β-aminoethyl)-γ-aminopropyl Stir and mix evenly at room temperature, raise the temperature to 50°C, and react in this environment for 90 minutes; raise the temperature to 140°C, and react for 40 minutes under the condition of stirring, and obtain a modified permanent bismaleimide resin. After the resin is cured at 140°C / 2h, 160°C / 2h, 180°C / 2h and 200°C / 2h and post-cured at 240°C / 4h, a modified bismaleimide cured resin is obtained.

Embodiment 3

[0031] Put 100g of N,N'-4,4'-diphenylmethane bismaleimide, 43g of diallyl bisphenol A and 6.3g of N-(β-aminoethyl)-γ-aminopropyl Triethoxysilane was stirred and mixed evenly at room temperature, raised to 50°C, and reacted in this environment for 90 minutes; raised to 140°C, reacted for 40 minutes under stirring conditions, and obtained a Modified bismaleimide resin. After the resin is cured at 140°C / 2h, 160°C / h, 180°C / 2h and 200°C / 2h and post-cured at 240°C / 4h, a modified bismaleimide cured resin is obtained.

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Abstract

The invention relates to modified bismaleimide resin and a preparation method of the modified bismaleimide resin. The method comprises the following steps of: uniformly mixing N,N'-4,4'-diphenylmethane bismaleimide, diallyl bisphenol A and N-(beta-aminoethyl)-gamma-aminopropyl trimethoxy silane in proportion under a normal temperature and normal pressure condition, reacting at 40-60 DEG C for 40-100 minutes, rising the temperature to 130-150 DEG C, reacting for 40-100 minutes while keeping stirring, carrying out vacuum debubbling so as to obtain the modified bismaleimide resin, and carrying out the curing process and the curing treatment so as to obtain cured resin. According to the method, the activity of the siloxane upamido and the unique structure are utilized for comixing / copolymerization modification with the resin, so that the process is simple and easy to control. The prepared modified bismaleimide resin is small in melting viscosity and good in solvent dissolubility; and moreover, the prepared cured resin is increased in comprehensive properties such as toughness, heat resistance, dielectric property and the like.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a modified bismaleimide resin and a preparation method thereof, which is a modified bismaleimide resin with high toughness, high heat resistance and low dielectric constant Amine resin. Background technique [0002] Bismaleimide resin (BMI) is a newly developed resin material at home and abroad in recent decades, because of its good high temperature resistance, radiation resistance, heat and humidity resistance, low moisture absorption rate and small thermal expansion coefficient, etc. field has received extensive attention. However, BMI resin has the same disadvantages as other thermosetting resins, such as high brittleness, poor manufacturability and high molding temperature when used to prepare composite materials. In order to improve its shortcomings, improving toughness and manufacturability has become an important direction for the development of BMI resin matrix compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10
Inventor 张秋禺吴寅顾军渭陈营周艳阳
Owner NORTHWESTERN POLYTECHNICAL UNIV
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