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Method for employing anion polymeric polyamide as epoxy resin curing agent

A technology of epoxy resin curing and anionic polymerization, applied in the field of epoxy resin curing agent, can solve the problems of low thermal performance, high viscosity, poor appearance and color, etc., and achieve the effect of improving impact resistance and low viscosity

Inactive Publication Date: 2008-06-18
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When polyamide is used as an epoxy curing agent, the alloy of the two has good toughness, corrosion resistance and low toxicity, but this type of curing agent has disadvantages such as low thermal performance, high viscosity, and poor appearance color.

Method used

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  • Method for employing anion polymeric polyamide as epoxy resin curing agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The curing reaction process of epoxy resin and caprolactam monomer anionic polymerization growth chain, the caprolactam monomer is melted, the catalyst sodium hydroxide is added and the moisture is removed by vacuum distillation at 140°C, and then the E which has been removed in a vacuum oven at 80°C is added. -51 epoxy resin, after fully stirring under the protection of nitrogen, add the activator 2,4-toluene diisocyanate, cast it into a mold at 140°C, and obtain a nylon 6 / epoxy resin reaction alloy after the curing reaction is complete.

Embodiment 2

[0017] The curing reaction process of epoxy resin and laurolactam monomer anionic polymerization growth chain, the laurolactam monomer is melted, the catalyst metal sodium is added and the moisture is removed by vacuum distillation at 160°C, and then added in a vacuum oven at 100°C After fully stirring the E-51 epoxy resin with water removed from the medium, under the protection of nitrogen, add the activator acid chloride, and cast it into a mold at 160 ° C. After the curing reaction is complete, the reaction alloy of nylon 12 / epoxy resin is obtained.

Embodiment 3

[0019] The curing reaction process of epoxy resin and butyrolactam monomer anionic polymerization growth chain, the butyrolactam monomer is melted, the catalyst sodium hydride is added and the moisture is removed by vacuum distillation at 120°C, and then the water is removed in a vacuum oven at 60°C After the E-51 epoxy resin with moisture is fully stirred under the protection of nitrogen, the activator isocyanate is added, and it is cast into a mold at 120 ° C. After the curing reaction is complete, the reaction alloy of nylon 4 / epoxy resin is obtained.

[0020] The following is the curing reaction process of epoxy resin and caprolactam monomer anionic polymerization growth chain:

[0021]

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Abstract

The present invention relates to a method which uses anion polymerized polyamide as epoxy curing agent. The method utilizes the open-loop reaction of amido and epoxy; the epoxy is added in the anion polymerization of lactam monomer; after full being stirred and mixed, the anion polymerization reaction and epoxy curing reaction are carried out simultaneously under a certain temperature, thus finally obtaining the reactive alloy of the two reactions. Compared with the prior technology, the curing agent provided by the present invention is low in viscosity and can improve the shock resistance of the epoxy system.

Description

technical field [0001] The invention relates to the technical field of epoxy resin curing modification, in particular to a method for using anionic polymerized polyamide as an epoxy resin curing agent. Background technique [0002] Epoxy resin forms a three-dimensional, insoluble and infusible network structure after cross-linking and curing, with high strength, low shrinkage, good chemical resistance and adhesive properties. However, the cured epoxy resin has low impact performance. In order to improve its toughness, many epoxy resin systems added with rubber polymers have been applied. In addition, various thermoplastic polymers have also attracted attention for the toughening of epoxy resins, including polyamide polymers. When polyamide is used as an epoxy curing agent, the alloy of the two has good toughness, corrosion resistance and low toxicity, but this type of curing agent has disadvantages such as low thermal performance, high viscosity, and poor appearance color. ...

Claims

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Application Information

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IPC IPC(8): C08G69/18C08G69/40C08G59/44
Inventor 龚颖杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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