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A kind of toughening type epoxy resin curing agent and its preparation method and application

An epoxy resin curing and toughening technology, applied in the field of building materials, can solve the problems affecting the durability of materials, complicated synthesis process, high viscosity, etc., and achieve the effects of low cost, simple preparation method and low viscosity

Active Publication Date: 2015-12-23
JIANGSU SOBUTE NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of adding a toughening agent will affect the durability of the material; while the synthesis process of polyamide curing agent is cumbersome and has a high viscosity, it generally needs to add a diluent before it can be used at room temperature

Method used

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  • A kind of toughening type epoxy resin curing agent and its preparation method and application
  • A kind of toughening type epoxy resin curing agent and its preparation method and application
  • A kind of toughening type epoxy resin curing agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of toughening type epoxy resin curing agent comprises the following steps:

[0025] (1) Add polyamine to the flask equipped with stirring first, then add the cyclic carbonate compound dropwise at room temperature, and finish the drop within 30 minutes (cool the flask with an ice-water bath at the right time during the process to ensure that the entire The temperature of the system during the process is kept between 20 and 30°C), and compound A is obtained after stirring at room temperature for 20-40 minutes after dropping;

[0026] (2) Add polyamine to the flask equipped with stirring first, raise the temperature to 50-70°C, drop the lactone adduct, and drop it within 30 minutes (cool the flask with a cold water bath at the right time during the process to ensure that the whole The temperature of the system during the process is kept at the set temperature), and after the dripping is completed, the reaction is kept for 1 to 3 hours to obtain compound B; ...

Embodiment 2

[0039] Preparation of cured epoxy resin:

[0040] Using the 8 curing agents prepared in Example 1, commercially available polyamide 650 curing agent (Changsha Chemical Industry), commercially available phenolic modified T31 curing agent (Changsha Chemical Industry), diethylenetriamine (DETA) and isophorone Diamine (IPDA) was mixed with E51 epoxy resin according to the optimal reaction ratio to prepare epoxy resin cured product

[0041] The compressive strength, tensile strength, elongation, tensile elastic modulus and steel-steel tensile shear strength were tested respectively.

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Abstract

The invention provides a toughening epoxy resin curing agent which is prepared from a compound A, a compound B and amino polyether, wherein polyamine and cyclic carbonate compound are subjected to a cyclic-opening reaction to obtain the compound A, and polyamine and lactone compound are subjected to a cyclic-opening reaction to obtain the compound B. The invention further provides a preparation method and application of the toughening epoxy resin curing agent. The toughening epoxy resin curing agent is simple in preparation method and low in cost, and has the advantages of good toughening effect, low viscosity, solidification at the room temperature, colorlessness, transparency, environment friendliness and the like.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a toughening epoxy resin curing agent and a preparation method thereof, and also relates to the application of the curing agent in preparing epoxy resin cured products. Background technique [0002] Cured epoxy resin has the characteristics of strong adhesion, can be cured at room temperature, small curing shrinkage, high mechanical properties and excellent corrosion resistance, so it is widely used in construction, machinery, electronics, etc. as adhesives, coatings, and grouting materials. and many other fields. However, the brittleness of epoxy resin materials is relatively large, and they are prone to fracture and damage under the action of external impact force, which has become one of the biggest problems restricting the application of epoxy resin materials. [0003] In existing applications of cured epoxy resins, the toughening of epoxy resin systems is usual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/62C08G59/56C08G59/46
Inventor 乔敏俞寅辉高南箫尹浩冉千平刘加平
Owner JIANGSU SOBUTE NEW MATERIALS
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