Toughened epoxy curing agent and preparation method thereof

Abstract

The invention discloses a toughened epoxy curing agent and a preparation method thereof. The toughened epoxy curing agent is prepared by an amine substance and epoxidized soybean oil. The optimum composition ratio of raw materials is obtained through a large number of experimental screenings. The method prepares the toughened epoxy curing agent by modifying the amine substance and epoxidized soybean oil under optimal steps and conditions by a preferred scheme. The curing agent applied to epoxy resin has excellent toughness and crack resistance, and has good curing speed, impact resistance andcorrosion resistance, and achieves very good technical effects.

Description

technical field

[0001] The invention relates to an epoxy resin curing agent, in particular to an environment-friendly toughening epoxy curing agent and a preparation method, and belongs to the technical field of polymer materials. Background technique

[0002] The two-component system composed of epoxy resin and epoxy curing agent is widely used in floor coatings, Anti-corrosion coatings, adhesives, composite materials and other fields. However, the epoxy system also has the disadvantage of poor flexibility, which makes the cured paint film or glue block brittle and easy to crack. In order to improve this phenomenon, it is often necessary to add a large amount of toughening agent or plasticizer to the formula, but this will lead to the problems of chemical resistance and electrical performance degradation at the same time. Therefore, the design of epoxy curing agent with toughening effect has become a new idea to solve the flexibility problem of epoxy system. Contents of...