Method for producing a two-component sealant

Abstract

The invention relates to the field of adhesives and sealants, widely used for sealing and gluing various products and structures during various construction and repair works. The technical result is achieved by a method for producing a two-component sealant, which includes preparing component A, containing a polymer binder, a dispersed filler and aerosil, and component B, containing an amine hardener and a catalyst, mixing the components until homogeneous masses are obtained and then mixing components A and B, characterized in that carbon black (soot) of grade P514 and / or P803 is used as a dispersed filler, which is pre-treated with a 4% solution of nitric acid, washed until a neutral medium, then treated with a 3% solution of hydrogen peroxide and dried at a temperature of 130°C, while in component A, the epoxy resin Etal 370, used as a binder, is heated at a temperature of 30–50°C and maintained at a temperature of 60–110°C for 2 hours, after which aerosil, polyetheramine and the specified carbon black are introduced and mixed until a homogeneous state, and triethylenetetramine, used as a hardener, carbon black and an amine catalyst are added to component B with subsequent mixing, after which components A and B are mixed in the following ratio of components, parts by weight: Component A: epoxy resin Etal 370 - 35 polyetheramine 8 carbon black (carbon black) grade P514 and / or P803 - 54 aerosil - 6 Component B: triethylenetetramine -35 carbon black (carbon black) grade P514 and / or P803 -55 amine catalyst -10