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Bismaleimide resin prepolymer and its application

A maleimide resin, bismaleimide technology, applied in thermosetting resin and its preparation, remodelable bismaleimide resin prepolymer and its preparation field, can solve the problem of remodeling thermosetting Resin has low comprehensive properties, limited remodelable thermosetting matrix properties, poor heat resistance and mechanical properties, etc., to achieve the effects of good rotational flexibility, good shape memory function, and high thermal stability

Active Publication Date: 2021-07-09
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The remodelable thermosetting resins developed by the existing technology generally have the problem of low comprehensive performance (initial thermal decomposition temperature <350°C, glass transition temperature <180°C, tensile strength <80MPa, tensile modulus < 2700MPa), which limits the application of remodelable thermosetting resins in high-performance fields
In addition, traditional thermosetting SMPs cannot be reshaped, and the remodelable thermosetting SMPs developed by the existing technology are limited by the performance of the remodelable thermosetting matrix, which also has the problem of poor heat resistance and mechanical properties.

Method used

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  • Bismaleimide resin prepolymer and its application
  • Bismaleimide resin prepolymer and its application
  • Bismaleimide resin prepolymer and its application

Examples

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Effect test

preparation example Construction

[0041] The preparation method of bismaleimide resin prepolymer of the present invention is as follows:

[0042] (1) In the presence of quaternary ammonium salt, react 2-allylphenyl glycidyl ether with terephthalic acid to prepare bis(3-(2-allylphenoxy)-2-hydroxypropyl) terephthalates;

[0043] (2) Mix bis(3-(2-allylphenoxy)-2-hydroxypropyl) terephthalate, bismaleimide and zinc compound to obtain bismaleimide resin prepolymer.

Embodiment 1

[0045] 1) Preparation of 2-allylphenyl glycidyl ether

[0046] On a mass basis, mix 120g of 2-allylphenol, 140g of sodium hydroxide, 10g of tetrabutylammonium bromide and 230g of tetrahydrofuran, and insulate and react at 35°C for 1.5h under stirring conditions to obtain solution A; Slowly add 270 g of epichlorohydrin dropwise, and keep stirring at 35° C. for 6 hours to react; after the reaction, vacuum rotary evaporation removes tetrahydrofuran and epichlorohydrin to obtain a crude product. The crude product was washed successively with saturated ammonium chloride solution (200 mL×2), deionized water (200 mL×2), and finally separated and purified by chromatography to obtain a yellow transparent liquid, namely 2-allylphenyl Glyceryl ether, the yield is about 93%, its reaction formula and 1 H-NMR see attached figure 1 and 2 .

[0047] 2) Preparation of bis(3-(2-allylphenoxy)-2-hydroxypropyl)terephthalate

[0048] On a mass basis, mix 120g 2-allylphenyl glycidyl ether, 45g ...

Embodiment 2

[0090] 1) Preparation of 2-allylphenyl glycidyl ether

[0091] On a mass basis, mix 120g of 2-allylphenol, 100g of sodium hydroxide, 5g of tetramethylammonium bromide and 200g of tetrahydrofuran, and insulate and react for 1 hour at 25°C with stirring to obtain solution A; 250 g of epichlorohydrin was added dropwise, and the mixture was stirred and reacted at 25° C. for 6 hours; after the reaction was completed, tetrahydrofuran and epichlorohydrin were removed by vacuum rotary evaporation to obtain a crude product. The crude product was washed successively with saturated ammonium chloride solution (200 mL×2), deionized water (200 mL×2), and finally separated and purified by chromatography to obtain a yellow transparent liquid, namely 2-allylphenyl Glyceryl ether, the yield is about 90.1%.

[0092] 2) Preparation of bis(3-(2-allylphenoxy)-2-hydroxypropyl)terephthalate

[0093] By mass, mix 120g of 2-allylphenyl glycidyl ether, 40g of terephthalic acid, 5g of tetramethylammoni...

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Abstract

The invention discloses a bismaleimide resin prepolymer and its application. The specific preparation is as follows: 2-allylphenyl glycidyl ether and terephthalic acid are blended in acetonitrile, and an esterification reaction occurs under the condition of a quaternary ammonium salt as a catalyst to obtain bis(3- (2‑allylphenoxy)‑2‑hydroxypropyl)terephthalate; bis(3‑(2‑allylphenoxy)‑2‑hydroxypropyl)terephthalate The formate ester and the bismaleimide are uniformly mixed to obtain a bismaleimide resin prepolymer, which is cured to obtain a remodelable bismaleimide resin. The remodelable bismaleimide resin prepared by the bismaleimide resin prepolymer of the present invention not only has excellent heat resistance and mechanical properties, but also can realize remodeling under hot pressing conditions, and is used in aerospace, It has broad application prospects in industrial fields such as transportation, electronic information, new energy, and electrical insulation.

Description

technical field [0001] The invention relates to a thermosetting resin and a preparation method thereof, in particular to a remodelable bismaleimide resin prepolymer and its preparation method and application, belonging to the technical field of polymer materials. Background technique [0002] Thermosetting resin is an important class of polymer materials, accounting for about 18% of the total polymer. Thermosetting resins are widely used in many fields such as electronic information, energy, aerospace, transportation, etc. as composite material matrix, coating, adhesive, etc. With the increasingly serious problem of environmental pollution and the concept of green and sustainable development, the recycling and reuse of thermosetting materials after their effective service life has become an urgent problem to be solved. At the same time, with the rapid development of electronic technology, the life cycle of a large number of electronic products and smart devices has been sig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/12C08L79/08
CPCC08G73/124C08G2280/00C08L79/085C08L2201/08C08L2201/12
Inventor 梁国正
Owner SUZHOU UNIV
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