Polythioether sealant and synthesis method thereof

The invention belongs to the technical field of synthesis and production of high polymer materials, and relates to synthesis of a polythioether sealant with a wave-absorbing function. According to the invention, retinaldehyde and a diamine compound react to generate retinyl diamine Schiff base, and the retinyl diamine Schiff base is used as a curing agent for polythioether macromolecules to form a cross-linked network structure, so that the retinyl diamine Schiff base is used as a sealant material. The retinol Schiff base becomes a side chain group on a macromolecule, so that the material can generate certain electromagnetic absorption performance. The preparation method comprises the following steps: adding inorganic fillers such as calcium carbonate, kaolin or bentonite into polythioether macromolecules, uniformly mixing to obtain a base paste component of the sealant, taking retinyl diamine Schiff base as a curing agent component of the sealant, mixing according to a certain ratio, and ...