ANTIFRICTION COMPOSITION AND ITS PREPARATION METHOD Russian patent published in 2021 - IPC C08J5/16 D01F9/16 D01F11/16 C08L63/00 C08L61/10 F16C33/04 

FIELD: antifriction products.

SUBSTANCE: present invention relates to a class of carbon fiber reinforced structural polymer composite materials based on carbon graphitized fabric as a reinforcing filler and epoxide matrix for the manufacture of antifriction products. The composite can be used for the manufacture of butt seals of support bearings and plain bearings. The antifriction composition includes a carbon fabric and a polymer binder. According to the invention, the reinforcing filler is carbon fabric graphitized at a temperature of 2400°C obtained from a hydrate-cellulose fabric, the fiber structure of which is modified before carbonation by intensive short-term heating and heat-moisture exposure. The polymer binder additionally contains an aluminum-organic-siloxane varnish, polyethylene polyamine and chlorinated paraffin at the following ratio of components, wt. pt.: graphitized fabric is 50.0, epoxide resin is 49.0, aluminum-organic-siloxane varnish is 9.0, polyethylene polyamine is 2.0 and chlorinated paraffin is 0.9. A method for manufacturing an antifriction composition is also described, which includes the manufacture of carbon fabric and the preparation of a fabric semi-finished product based on epoxide resin and solvent. It is characterized in that the initial hydrate-cellulose fabric is subjected to intensive short-term heating and heat-moisture exposures before carbonation to modify the fiber structure. After carbonation to a temperature of 320°C, it is graphitized in an inert atmosphere at a temperature not lower than 2400°C. Chlorinated paraffin powder is introduced into the epoxide resin heated to a temperature of 90°C and mixed. Then, aluminum-organic-siloxane varnish, polyethylene polyamine and toluene are poured in an amount of 46 wt. pt. of the weight of the epoxide resin and additionally mixed. The impregnating compound is drained into a separate container and, after a short exposure, it is poured into a mixer and mixed. The graphitized fabric is impregnated by dipping into the impregnating compound with pressing after impregnation to a wet weight gain of the compound up to 80%. The prepared wet semi-finished product is cut into workpieces, packages of workpieces are laid out in a mold and pressed.

EFFECT: obtaining an antifriction composition.

4 cl, 1 dwg, 1 ex