Unlock instant, AI-driven research and patent intelligence for your innovation.

Epoxy hardener containing maleimide structure and preparation method thereof

A technology of maleimide and curing agent, which is applied in the field of epoxy curing agent and its preparation, can solve the problems of poor compatibility, solubility, and poor processability, and achieve simple purification process and good compatibility , good heat resistance

Pending Publication Date: 2021-06-25
三棵树(上海)新材料研究有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the heat resistance of bismaleimide is good, its poor compatibility and solubility make its processability poor

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
  • Epoxy hardener containing maleimide structure and preparation method thereof
  • Epoxy hardener containing maleimide structure and preparation method thereof
  • Epoxy hardener containing maleimide structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Specifically, a preparation method of an epoxy curing agent containing a maleimide structure mainly comprises the following steps:

[0027] (1) 19.61g maleic anhydride was added in the reactor (500ml), then at a temperature of 40°C, 100ml of acetic acid was added, and stirred for 2 minutes under industrial nitrogen protection.

[0028] (2) Add 100ml of acetic acid into reactor 2 (500ml), then add 29.20g of triethylenetetramine dropwise at 0°C to obtain a triethylenetetramineacetic acid solution, and the dropping speed is 2 drops / second.

[0029] (3) Drop the triethylenetetramineacetic acid solution obtained in step (2) into the product obtained in step (1) at a temperature of 40° C., and then keep the temperature at 40° C. for 1 hour; the dropping rate is 2 drops / second. The mol ratio of maleic anhydride and the aliphatic amine in the step (two) is 1.0:1.0 in the step (one);

[0030] (4) Then raise the temperature to 80°C and keep it warm for 10 hours;

[0031] (5) Th...

Embodiment 2

[0037] Specifically, a preparation method of an epoxy curing agent containing a maleimide structure mainly comprises the following steps:

[0038] (1) 19.61g maleic anhydride was added in the reactor (500ml), then at a temperature of 43°C, 120ml of acetic acid was added, and stirred for 2 minutes under industrial nitrogen protection.

[0039] (2) Add 100ml of acetic acid into reactor 2 (500ml), then add 12.02g of ethylenediamine dropwise at a temperature of 5°C to obtain an ethylenediamineacetic acid solution, and the dropping speed is 2 drops / second.

[0040] (3) Add the ethylenediamineacetic acid solution obtained in step (2) dropwise into the product obtained in step (1) at a temperature of 43°C, and then keep the temperature at 43°C for 1 hour; the dropping rate is 2 drops / second. The mol ratio of maleic anhydride and the aliphatic amine in the step (two) is 1.0:1.0 in the step (one);

[0041] (4) Then raise the temperature to 80°C and keep it warm for 9 hours;

[0042] ...

Embodiment 3

[0048] Specifically, a preparation method of an epoxy curing agent containing a maleimide structure mainly comprises the following steps:

[0049] (1) 19.61g maleic anhydride was added in the reactor (500ml), then at a temperature of 45°C, 80ml of acetic acid was added, and stirred for 2 minutes under industrial nitrogen protection.

[0050] (2) Add 100ml of acetic acid into reactor 2 (500ml), then add 20.63g of diethylenetriamine dropwise at a temperature of 50°C to obtain a solution of diethylenetriamineacetic acid, and the dropping speed is 3 drops / second.

[0051](3) Add the ethylenediamineacetic acid solution obtained in step (2) dropwise into the product obtained in step (1) at a temperature of 45°C, and then keep the temperature at 45°C for 1 hour; the dropping rate is 2 drops / second. The mol ratio of maleic anhydride and the aliphatic amine in the step (two) is 1.0:1.0 in the step (one);

[0052] (4) Then raise the temperature to 80°C and keep it warm for 10 hours;

...

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
tack-free timeaaaaaaaaaa
Login to View More

Abstract

The invention relates to an epoxy hardener containing a maleimide structure and a preparation method thereof, the epoxy hardener containing the maleimide structure is composed of components with the following structural general formula according to any proportion, n = 0, 1, 2, 3 or 4, and an R group is a group obtained by removing amino groups at two ends in fatty amine. The invention relates to a preparation method of the epoxy hardener. The epoxy hardener is prepared by reacting aliphatic amine and maleic anhydride in a molar ratio of 1.0: (0.3-1.6). The novel hardener is prepared, the hardener is non-toxic, the compatibility of maleimide and hardener components is good, the prepared hardener is good in heat resistance, the generated small-molecule polyamide structure is beneficial to improving the flexibility and adhesion of epoxy resin cured materials, and the hardener has good comprehensive performance.

Description

technical field [0001] The invention relates to an epoxy curing agent containing a maleimide structure and a preparation method thereof. Background technique [0002] Uncured epoxy resin is a thermoplastic oligomer, which will not cure at room temperature or under general heating, and cannot meet the needs of use. Only by converting it into a thermosetting polymer with a three-dimensional network structure through a curing agent can it have excellent properties. performance and real practical value. The development of epoxy resin application technology is closely related to the structure, specification and quality of curing agent. Using curing agent to achieve the ideal application effect of epoxy resin is the main task of formula design. [0003] Aliphatic amine compounds are the simplest and most common curing agents. They are inexpensive, highly reactive, and can rapidly cure epoxy resins at room temperature. However, the heat resistance of its cured product is generall...

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): C08G59/50C07D207/452
CPCC08G59/506C07D207/452
Inventor 李保君付绍祥洪杰
Owner 三棵树(上海)新材料研究有限公司