Dendritic toughening curing agent as well as preparation method and application thereof

A curing agent and dendritic technology, applied in the field of preparation of dendritic toughening curing agent, can solve the problems of epoxy resin curing agent not having both toughening and curing dual properties, complicated preparation method and the like

Pending Publication Date: 2021-05-04
WEIHAI CY DENDRIMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the technical problem to be solved in the present invention is to overcome the problem that the existing epoxy resin curing agent cannot have the dual properties of toughening and curing and the preparation method is complicated, and propose an epoxy resin with excellent curing performance A dendritic toughening curing agent capable of significantly improving resin toughness, simple in preparation method, and easy to realize industrial production, its preparation method and its application

Method used

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  • Dendritic toughening curing agent as well as preparation method and application thereof
  • Dendritic toughening curing agent as well as preparation method and application thereof
  • Dendritic toughening curing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add ethylene glycol diglycidyl ether dropwise to diethylenetriamine, feed according to the molar ratio of the number of epoxy groups to diethylenetriamine 1:1, and react at 40 °C for 5 hours, then the terminal amino group can be obtained. The dendritic toughening curing agent 1.

[0034] The above-mentioned dendritic toughening curing agent 1 was blended with epoxy resin, and its application performance was tested after curing at 60°C for 2 hours.

Embodiment 2

[0036] Add polyethylene glycol diglycidyl ether dropwise to triethylene tetramine, feed according to the molar ratio of the number of epoxy groups and triethylene tetraamine 1:1.5, and react at 60 ° C for 8 hours, then the terminal amine can be obtained. Based dendritic toughening curing agent 2.

[0037] The above-mentioned dendritic toughening curing agent 2 was blended with epoxy resin, and its application performance was tested after curing at 60°C for 2 hours.

Embodiment 3

[0039] Castor oil triglycidyl ether is added dropwise to tetraethylene pentamine, feeding according to the number of epoxy groups and tetraethylene pentamine molar ratio of 1:3, react at 40 ° C for 5 hours, and then the terminal amine group can be obtained. The dendritic toughening curing agent 3.

[0040] The above-mentioned dendritic toughening curing agent 3 was blended with epoxy resin, and its application performance was tested after curing at 60°C for 2 hours.

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Abstract

The invention discloses a dendritic toughening curing agent as well as a preparation method and application thereof, and belongs to the field of curing agents. According to the technical scheme, an epoxy-terminated monomer containing a flexible long chain reacts with a polyethylene polyamine monomer at a certain temperature to generate the amino-terminated dendritic toughening curing agent. The agent is applied to epoxy resin curing and toughening, can be used to solve the problems that the existing epoxy resin curing agent cannot have both toughening and curing properties and the preparation method is complicated, and has the characteristics of excellent curing property, capability of remarkably improving the resin toughness, simple preparation method and easiness in industrial production.

Description

technical field [0001] The invention belongs to the field of curing agents, in particular to a dendritic toughening curing agent and its preparation method and application. Background technique [0002] As a commonly used matrix resin material, epoxy resin has the characteristics of strong adhesion, excellent electrical insulation performance, easy processing and molding, good filler combination performance, and excellent wear resistance. It is widely used in chemical industry, aerospace, medicine, environmental protection, etc. and other fields. However, epoxy resin forms a highly cross-linked three-dimensional network structure after curing, which is characterized by high brittleness, poor impact resistance, and insufficient crack growth resistance. Therefore, the toughening during the curing process is particularly important. Commonly used methods for toughening epoxy resins include: compounding with materials with excellent toughness such as rubber elastomers, thermopla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/04C08G59/50
CPCC08G73/024C08G59/504
Inventor 谭志刘聪聪李武松王战涛
Owner WEIHAI CY DENDRIMER TECH
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