PRODUCTION METHOD OF POLYIMIDE COMPOSITE FILM COATING REINFORCED BY NANOSTRUCTURED SILICON CARBIDE (VERSIONS) Russian patent published in 2017 - IPC C09D133/24 C08J5/04 B82B3/00 C08K3/34 

FIELD: nanotechnology.

SUBSTANCE: invention concerns the technology of nanocomposite production based on nanostructured silicon carbide with the polyimide matrix, which can be applied in various engineering fields, in particular, in the manufacturing of structural materials, used in the aviation and space industry, in the rocket engineering, electrical engineering, in cable industry and microelectronics. The essence of the invention consists in the preparation of the composite film coating, based on the polyimide matrix, reinforced with nanostructured silicon carbide, using the nanostructured unmodified or modified silicon carbide as the reinforcing element, which is introduced in the content with amount of 0.2-10 wt % from the resulting composite weight. The silicon carbide is introduced in the form of suspension in dry, polar, organic solvent. The modified silicon carbide is obtained by silicon carbide suspension processing at 100-150°C with chlorosilane. The silicon carbide suspension is stirred by means of ultrasound in the inert gas flow with the diamine, after which it is cooled up to 1-15°C and the dianhydride amount equimolar with respect to the diamine is added with stirring to the resulting reaction mass. The reaction mass is subjected to ultrasonic stirring, the resulting dispersion is applied to the substrate and dried by stepwise heating according to the specified scheme with following cooling.

EFFECT: reduction of the energy intensity and the process duration.

7 cl, 1 tbl, ex 4