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Flexible curing agent for epoxy resin

A technology of epoxy resin and curing agent, applied in the field of epoxy resin, to achieve the effect of simple preparation process, low cost and solving brittle cracking

Inactive Publication Date: 2019-12-17
原宇航
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main technical problem to be solved by the present invention is to provide a flexible curing agent for epoxy resin, the formula system is flexible, and it is synthesized from polyethylene polyamine and methyl methacrylate by using the principle of addition reaction between polyamine and ethylenic double bond. It can effectively solve the problem of brittle cracking during the use of epoxy resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The preparation steps of described epoxy resin flexible curing agent are as follows:

[0014] a. Put the polyether polyol, methyl methacrylate, n-hexane, hydroquinone and catalyst into a reaction vessel for reflux reaction at a reaction temperature of 100-125°C for 4-8 hours, Cool to room temperature after the reaction is over, and distill under reduced pressure to obtain polyol acrylate;

[0015] b. Put the polyol acrylate prepared in step a, and the polyethylene polyamine and methanol in the recipe amount into a reaction vessel, the reaction temperature is 20-30°C, the reaction time is 1-2h, and the pressure is reduced Amine and methanol are removed by distillation to obtain the epoxy resin flexible curing agent.

[0016] Wherein, in the step a, the reaction temperature of the polyether polyol, methyl methacrylate, n-hexane, hydroquinone and the catalyst is 110-120°C, and the reaction time is 6-7h. The reaction temperature and time are reasonable, so that the reacti...

Embodiment 1

[0019] A kind of epoxy resin flexible curing agent, its raw material comprises: methyl methacrylate, hydroquinone, normal hexane, polyethylene polyamine, methyl alcohol, polyether polyol and tetramethyl ammonium chloride, wherein each raw material The molar ratio is: methyl methacrylate: hydroquinone: n-hexane: polyethylene polyamine: methanol: polyether polyol: tetramethylammonium chloride = 8:0.5:0.5:5:0.5:4: 1 ;

[0020] The preparation steps of described epoxy resin flexible curing agent are as follows:

[0021] a. Put the polyether polyol, methyl methacrylate, n-hexane, hydroquinone and tetramethylammonium chloride into a reaction vessel for reflux reaction at a reaction temperature of 110°C for 7 hours , after the reaction is finished, cool to room temperature, and distill under reduced pressure to obtain polyol acrylate;

[0022] b. Put the polyol acrylic acid ester prepared in step a, and the polyethylene polyamine and methanol in the formula amount into a reaction v...

Embodiment 2

[0024] A kind of epoxy resin flexible curing agent, its raw material comprises: methyl methacrylate, hydroquinone, normal hexane, polyethylene polyamine, methyl alcohol, polyether polyol and benzyl trimethyl ammonium chloride, wherein said The molar ratio of each raw material is: methyl methacrylate: hydroquinone: n-hexane: polyethylene polyamine: methanol: polyether polyol: benzyltrimethylammonium chloride=8:0.5:0.5:5: 0.5:4:1;

[0025] The preparation steps of described epoxy resin flexible curing agent are as follows:

[0026] a. Put the polyether polyol, methyl methacrylate, n-hexane, hydroquinone and benzyltrimethylammonium chloride into the reaction vessel for reflux reaction at a reaction temperature of 120° C. Reacted for 6h, cooled to room temperature after the reaction, and distilled under reduced pressure to obtain polyol acrylate;

[0027] b. Put the polyol acrylic acid ester prepared in step a, and the polyethylene polyamine and methanol in the formula amount in...

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PUM

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Abstract

The invention discloses a flexible curing agent for epoxy resin. The raw materials of the flexible curing agent comprise methyl methacrylate, hydroquinone, n-hexane, a polyethylene polyamine, methanol, a polyether polyol and a catalyst according to a molar ratio of 8:0.5:0.5:5:0.5:4:1. A preparation method of the flexible curing agent for epoxy resin comprises the following steps: a, mixing and reacting the polyether polyol, methyl methacrylate, n-hexane, hydroquinone and the catalyst according to the above formula ratio to obtain a polyol acrylate; and b, mixing and reacting the polyol acrylate with formula amounts of the polyethylene polyamine and the methanol to obtain the flexible curing agent for epoxy resin. Flexiblization using the flexible curing agent adopting the above formula system can effectively solve the problem of brittle cracking of the epoxy resin in the using process.

Description

technical field [0001] The invention relates to the field of epoxy resin, in particular to a flexible curing agent for epoxy resin. Background technique [0002] Epoxy resin curing systems have many excellent properties, especially epoxy resin rapid curing systems at room temperature, and are widely used in various fields such as national economy and military because of their irreplaceable advantages. In the formulation design of epoxy resin, people adopt the formulation system composed of bisphenol A epoxy resin and conventional curing agent (amines, acid anhydrides), which often encounters the problem of high brittleness and easy cracking in many applications. For example, cast products are cracked and scrapped due to excessive brittleness and low elongation; when used as a coating adhesive, high rigidity and low elongation lead to low peel strength of the joint surface, which directly affects its use effect. Contents of the invention [0003] The main technical problem...

Claims

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Application Information

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IPC IPC(8): C08G59/50
CPCC08G59/504
Inventor 原宇航
Owner 原宇航
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