▎ 摘　　要

NOVELTY - A preparation method of wave-absorbing epoxy resin, involves (1) putting epoxy resin and absorbent into an internal mixer for banburying and coarse mixing to obtain coarse mixed wave-absorbing epoxy resin, where the epoxy resin is one or more of E-51 type epoxy resin, E-44 type epoxy resin, E-20 type epoxy resin, F-44 type epoxy resin, and F51 type epoxy resin, (2) putting coarse mixed wave-absorbing epoxy resin into an open mill, refining and mixing to obtain fine-mixed wave-absorbing epoxy resin, adding curing agent to the fine-mixed wave-absorbing epoxy resin to obtain wave-absorbing epoxy resin curing system, where the curing agent is selected from at least two kinds of fatty amine curing agent, polyamide curing agent, aromatic amine curing agent, polyether amine curing agent, dicyandiamide curing agent, and anhydride curing agent, and (3) triggering and curing the wave-absorbing epoxy resin curing system at different temperature stages to obtain a final product. USE - Preparation method of wave-absorbing epoxy resin of wave-absorbing epoxy resin composite material (all claimed). ADVANTAGE - The wave-absorbing epoxy resin has different viscosities in different process, which is beneficial for uniform dispersion of absorbent and calendering molding, so that the wave-absorbing epoxy resin has excellent wave-absorbing performance stability and process characteristics. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: 1.the wave-absorbing epoxy resin; 2.a preparation method of wave-absorbing epoxy resin composite material, which involves (a) putting epoxy resin and absorbent into an internal mixer for banburying and coarse mixing to obtain coarse mixed wave-absorbing epoxy resin, where the epoxy resin is one or more of E-51 type epoxy resin, E-44 type epoxy resin, E-20 type epoxy resin, F-44 type epoxy resin, and F51 type epoxy resin, (b) putting coarse mixed wave-absorbing epoxy resin into an open mill, refining and mixing to obtain fine-mixed wave-absorbing epoxy resin, adding curing agent to the fine-mixed wave-absorbing epoxy resin to obtain wave-absorbing epoxy resin curing system, where the curing agent is selected from at least two kinds of fatty amine curing agent, polyamide curing agent, aromatic amine curing agent, polyether amine curing agent, dicyandiamide curing agent, and anhydride curing agent, and (c) triggering and curing the wave-absorbing epoxy resin curing system obtained in step (b) at a low temperature stage to obtain a wave-absorbing epoxy resin blank, and placing the wave-absorbing epoxy resin blank into a calender for calendering to obtain a wave-absorbing epoxy resin film, and (d) stacking multiple layers of the wave-absorbing epoxy resin film, and triggering curing in a high temperature stage to prepare a final product; and 3.the wave-absorbing epoxy resin composite material. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the preparation method of wave-absorbing epoxy resin. (Drawing includes non-English language text)