Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Bismaleimide eutectic mixture, preparation method and bismaleimide resin prepolymer

A technology of bismaleimide and bismaleamic acid, which is applied in the field of bismaleimide synthesis, can solve the problems of easy precipitation of bismaleimide monomers, affecting stability and validity period, and achieves Fewer side reactions, enhanced stability, and thorough response

Inactive Publication Date: 2019-03-08
陕西硕博电子材料有限公司
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the bismaleimide monomer in the bismaleimide resin prepolymer is easy to separate out and affect its stability and validity period in the prior art, the invention provides a bismaleimide Eutectic mixture, preparation method and bismaleimide resin prepolymer

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bismaleimide eutectic mixture, preparation method and bismaleimide resin prepolymer
  • Bismaleimide eutectic mixture, preparation method and bismaleimide resin prepolymer
  • Bismaleimide eutectic mixture, preparation method and bismaleimide resin prepolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of preparation method of bismaleimide eutectic mixture, described bismaleimide eutectic mixture is prepared by synthetic reaction by maleic anhydride and diamine mixture; Wherein the diamine mixture It includes two or more diamine compounds, and at least one aromatic diamine is contained in the two or more diamine compounds. The diamine compound also includes aliphatic diamine and alicyclic diamine.

[0034] The chemical principle of its synthesis is as follows:

[0035] The intermediate is formed by the reaction of maleic anhydride (also known as maleic anhydride, maleic anhydride, 2,5-furandione, etc.) with two or more diamine compounds (containing at least one aromatic diamine):

[0036]

[0037] The intermediate undergoes a dehydration ring-closure reaction under the action of a catalyst (triethylamine and nickel acetate) to form a bismaleimide eutectic mixture.

[0038]

[0039] The synthesis method that the bismaleimide eutectic mixture of the prese...

Embodiment 2

[0049] In this example, the diamine mixture is two aromatic diamine compounds: 4,4'-diaminodiphenylmethane and 2,2'-bis[4-(4-aminophenoxy)phenyl]propane, massage The mixture of molar ratio 1:1; Present embodiment adopts the preparation method of acetone method, in conjunction with specific reaction conditions, synthesizes bismaleimide eutectic mixture, and to the synthetic bismaleimide eutectic mixture Technical indicators are tested.

[0050] The preparation method of the bismaleimide eutectic mixture of the present embodiment specifically comprises the following steps:

[0051] (1) Add 100ml of acetone and a little water to a 500ml three-necked flask equipped with a stirrer, a thermometer and a reflux condenser, then add 0.21mol of maleic anhydride, stir and dissolve at room temperature; the amount of water added is 1% of the amount of acetone % (volume ratio), the effect of water is to improve the dispersibility of step (3) reaction product in acetone solution;

[0052] (...

Embodiment 3

[0062] The diamine mixture in this example is two aromatic diamine compounds: 4,4'-diaminodiphenylmethane and 3,3'-dimethyl-5,5'-diethyl-4,4'- Diaminodiphenylmethane, a mixture with a molar ratio of 1:1; this embodiment adopts the preparation method of the acetone method, combined with specific reaction conditions, to synthesize a bismaleimide eutectic mixture, and to synthesize bismaleimide The specifications of imide eutectic mixtures were tested.

[0063] The preparation method of the bismaleimide eutectic mixture of the present embodiment specifically comprises the following steps:

[0064] (1) Add 100ml of acetone and a little water into a 500ml three-necked flask equipped with a stirrer, thermometer and reflux condenser, then add 0.22mol maleic anhydride, stir and dissolve at room temperature; the amount of water added is 1% of the amount of acetone % (volume ratio), the effect of water is to improve the dispersibility of step (3) reaction product in acetone solution; ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
glass transition temperatureaaaaaaaaaa
melting pointaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention relates to a bismaleimide eutectic mixture, a preparation method and a bismaleimide resin prepolymer. The bismaleimide eutectic mixture is prepared from maleic anhydride and diamine mixture by synthetic reaction, wherein the diamine mixture comprises two or more diamine compounds which at least comprise one aromatic diamine. Molecular structures of the diamine compounds are different, and the diamine compounds further comprise aliphatic diamine and alicyclic diamine. The melting point of the prepared bismaleimide eutectic mixture is lower than that of pure compounds, the structural regularity of the formed eutectic mixture is reduced, and the solubility of the eutectic mixture in the bismaleimide resin prepolymer is increased. The prepared bismaleimide resin prepolymer is free from precipitation along with standing time, and the service life of the bismaleimide resin prepolymer is prolonged.

Description

technical field [0001] The invention belongs to the technical field of bismaleimide synthesis methods, and in particular relates to a bismaleimide eutectic mixture, a preparation method and a bismaleimide resin prepolymer. Background technique [0002] The general formula of bismaleimide monomer molecular structure is as follows: [0003] [0004] where: R 1 , R 2 For the same or different substituent groups, they are generally -H, and can also be -C n h 2n+1 group or other substituting groups, R is an aliphatic, alicyclic or aromatic substituting group. [0005] Generally, bismaleimide monomers with different structures are obtained by imidization reaction of maleic anhydride and aliphatic diamine, alicyclic diamine or aromatic diamine. When R is a benzene ring structure, the monomer has a high melting point, and its cured product has excellent heat resistance, and its glass transition temperature T g ≥250°C; when R is an alicyclic structure, the color of the cured...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/12
CPCC08G73/12
Inventor 冯翔冯立起
Owner 陕西硕博电子材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com