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Bimaleimide resin toughening modifiers and preparation method thereof

A technology of bismaleimide and toughening modifier, which is applied in the field of bismaleimide (BDM) preparation, can solve problems such as unusable, difficult process control, and difficult precise control, and achieve the effect of improving efficiency

Inactive Publication Date: 2013-10-09
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two bottlenecks in the use process that plague various industries using BDM
One is that the curing temperature of the resin is high, which not only causes a large waste of energy in the process, but also cannot be used in some industries
The second is that the curing time fluctuates greatly, it is difficult to control accurately, and it is difficult to control the process on the production line

Method used

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  • Bimaleimide resin toughening modifiers and preparation method thereof
  • Bimaleimide resin toughening modifiers and preparation method thereof
  • Bimaleimide resin toughening modifiers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The toughening modifier of a kind of bismaleimide resin prepared by the present embodiment, its general structural formula is expressed as:

[0024]

[0025] The preparation method of the present embodiment comprises the following steps:

[0026] Step 1: Add 20 grams of diallyl bisphenol A and 48.1 grams of epichlorohydrin into a three-necked flask equipped with a stirring and temperature control device, stir at 65°C for 15 minutes, cool down to below 60°C, and dissolve 6.5 grams of NaOH The solid was added to the reaction system twice in 50 minutes; the temperature was raised, and the reaction was carried out at 75°C for 4 hours; deionized water was added to dissolve the generated salt, and the liquid was separated with a separatory funnel, and the reaction solution in the lower layer was removed, and the remaining rings of the reaction were evaporated. Oxychloropropane; 30 g of toluene was added to the obtained crude product, washed with deionized water until the w...

Embodiment 2

[0031] The toughening modifier of a kind of bismaleimide resin prepared by the present embodiment, its general structural formula is expressed as:

[0032]

[0033] The preparation method of the present embodiment comprises the following steps:

[0034] Step 1: Add 20 grams of diallyl bisphenol A and 60.1 grams of epichlorohydrin into a three-necked flask equipped with a stirring and temperature control device, stir at 65°C for 10 minutes, cool down to below 60°C, and dissolve 6.0 grams of NaOH The solid was added to the reaction system in 3 times over 60 minutes; the temperature was raised, and the reaction was carried out at 110°C for 3 hours; deionized water was added to dissolve the generated salt, and the liquid was separated with a separatory funnel, and the reaction solution in the lower layer was removed, and the remaining rings of the reaction were evaporated. Oxychloropropane; add 35g toluene to the obtained crude product, wash with deionized water until the water...

Embodiment 3

[0039] The toughening modifier of a kind of bismaleimide resin prepared by the present embodiment, its general structural formula is expressed as:

[0040]

[0041] The preparation method of the present embodiment comprises the following steps:

[0042] Add 20 grams of diallyl bisphenol A and 55.2 grams of chloroethanol into a three-necked flask equipped with a stirring and temperature control device, and stir at 65°C for 10 minutes; cool down to below 60°C, and add 4.0 grams of NaOH solid to the reaction system Medium; raise the temperature and react at 110°C for 4 hours; add deionized water to dissolve the generated salt, separate the liquid with a separatory funnel, take the lower layer of the reaction solution, and distill off the remaining chlorohydrin; add to the obtained crude product An appropriate amount of toluene is washed with deionized water until the water phase is neutral, and the toluene is evaporated to obtain 20.4 grams of toughening modifier A of bismalei...

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Abstract

Bimaleimide resin toughening modifiers and a preparation method thereof are disclosed. The preparation method comprises: taking diallyl bisphenol A as the basis, carrying out etherification reaction by using a series of etherification reagents mainly comprising polyhydric alcohols, epoxy compounds, chlorohydrins, choroethers or the like, and reacting 20 parts by mass of diallyl bisphenol A and 15.0-72.0 parts by mass of the ether reagents, under catalysis of 2.2-8.8 parts by mass of an alkali (or an acid), at 60-150 DEG C for 1-10 h, to obtain a series of novel bimaleimide resin modifiers. The modifiers have good solubilizing and toughening effects on BMI bimaleimide resins without inhibition, and accurate control solidification of the bimaleimide resins is easy to realize in a use process.

Description

technical field [0001] The present invention relates to the preparation of bismaleimide resin (BDM), in particular to a toughening modifier of bismaleimide resin and a preparation method thereof. Background technique [0002] Diphenylmethane bismaleimide resin (BDM) is the most widely used type of bismaleimide (BMI) resin. Due to the high rigidity and symmetry of its structure, it has many unique properties such as high temperature resistance, wear resistance, high dielectric, high strength, and high weather resistance, so it has great application prospects in special materials. Such as lightweight and high-strength materials required by aerospace, encapsulation materials and laminates in the electronics industry, brake pads, chassis, body, bumpers and other composite materials with special properties in the automotive industry. However, a thorny problem encountered in the use of BDM is that BDM is too rigid to be used alone, and its miscibility with other resins is poor, w...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K5/053C07C43/23C07C41/26C07C41/16C07C41/03
Inventor 常刚吕燕曹瑞军
Owner XI AN JIAOTONG UNIV
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