Composite curing agent and epoxy resin composition prepared from composite curing agent

Abstract

The invention relates to a composite curing agent and an epoxy resin composition prepared from the composite curing agent. The composite curing agent comprises a modified amine curing agent, organic hydrazide and a Lewis acid amine complex. According to the epoxy resin composition prepared by taking the epoxy resin as the curing agent, the curing temperature is 120 DEG C, the required complete curing duration is controlled to be 8-12 minutes, the curing temperature is 150 DEG C, the required complete curing duration is controlled to be 5-10 minutes, the temperature required by the curing reaction is appropriate to the required duration, the curing efficiency is not reduced, the curing reaction is kept mild, and therefore, the problems of large reaction heat release, explosive polymerization, high brittleness after curing molding, low bending strength, poor dimensional stability and the like caused by violent reaction are effectively overcome. The curing agent is used as a preparation raw material and can be mixed with epoxy resin, an accelerant and a solvent to prepare an epoxy resin composition, the process is simple, and the production benefit is high.

Description

technical field [0001] The invention relates to the technical field of epoxy resin materials, in particular to a composite curing agent and an epoxy resin composition prepared from the composite curing agent. Background technique [0002] With the development of science and technology, the demand for epoxy resin systems has become more and more extensive. Epoxy resin-based composite materials have the advantages of high specific modulus, high specific strength, fatigue resistance, corrosion resistance, integral molding and strong designability. , has broad application prospects in aerospace, automobile manufacturing, sporting goods, molded products and other fields. However, the traditional epoxy resin composition has low reactivity and long curing time, which not only reduces the production efficiency, but also increases the production cost. The fast-curing epoxy resin composition realizes rapid curing of the resin at a specific temperature, improves production efficiency,...

AI Technical Summary

Problems solved by technology

The temperature required for curing is relatively high and the time required for curing is relatively short, the curing reaction is relatively violent, the heat release is concentrated, and it is easy to cause implosion, resulting in a decrease in material performance

The temperature required for curing is relatively low and the time required for curing is long, and the curing is slow. In particular, such an epoxy resin composition also has high requirements for the preparation process, low production efficiency and high cost.

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