METHOD FOR IMPACT-RESISTANT AND THERMAL-RESISTANT EPOXY ADHESIVE COMPOSITION AND EPOXY ADHESIVE COMPOSITION THEREOF

摘要

The present invention relates to an adhesive composition having the characteristics of impact resistance and heat resistance while simultaneously implementing high adhesive strength, and more particularly, it exhibits high adhesive strength and heat resistance simultaneously by the heat-resistant epoxy intermediate produced by the present invention and is suitable for heat-resistant epoxy Epoxy structural adhesive composition useful for joining eco-friendly automotive parts and industrial parts by realizing high adhesive strength and fast-curing properties by simultaneously introducing monomers each having a vinyl group and a thiol group at the ends, as polymer particles are uniformly dispersed in the monomers. It is about. The heat-resistant epoxy structural adhesive composition having impact resistance according to the present invention comprises: (a) a first component comprising an epoxy-cyanate ester intermediate and core-shell rubber particles; (b) a second component comprising a flame retardant and core-shell rubber particles dispersed in a tetrafunctional epoxy monomer; And (c) a third component comprising two types of monomers each having a vinyl group and a polyfunctional thiol group at the terminal. In addition, the method for preparing a heat-resistant epoxy structural adhesive composition having impact resistance according to the present invention is a mixture of core-shell rubber particles in an epoxy-cyanate ester intermediate prepared by heating a liquid epoxy resin and a cyanate ester at 80°C for 30 minutes. The first step of preparing the first component by stirring at 100 ℃ for 3 hours and then cooled to room temperature; A second step of mixing a 4-functional epoxy monomer with a flame retardant and stirring at 80° C. for 30 minutes, mixing core-shell rubber particles, stirring at 80° C. for 30 minutes, and slowly cooling to room temperature to prepare a second component; A third step of providing a third component, which is two types of monomers, each having a vinyl group and a polyfunctional thiol group at the terminal; The first component and the second component are mixed at room temperature for 10 minutes, and then the third component and the curing accelerator are mixed with stirring for 30 minutes and then slowly cooled to room temperature. do.