CURRENT-CONDUCTING POWDER BINDER BASED ON EPOXY COMPOSITION AND METHOD OF PRODUCING PREPREG AND REINFORCED CARBON COMPOSITE BASED ON IT (VERSIONS) Russian patent published in 2024 - IPC C08L63/00 C08J5/24 C09D5/46 B29C70/88 

FIELD: electrical communication equipment.

SUBSTANCE: present invention relates to a conductive powder binder for producing a reinforced carbon composite based on an epoxy composition, containing a solid epoxy resin, hardener and current-conducting filler in the following amount, wt.pts.: solid epoxy resin—100; conductive filler—25–55; solid hardener—stoichiometric amount. Also described is a method of producing a reinforced carbon composite based on a current-conducting powder binder according to claim 1, consisting in the fact that at 1st stage powdered binder is obtained, for which 100 wt.pts. solid epoxy resin, 25–55 wt.pts. current-conducting filler and stoichiometric amount of solid hardener are taken, mixing them and grinding to obtain a homogeneous powder; obtained mixture is extruded in a twin-screw mixer at temperature of 60 °C—zone I and II, 80 °C—zone III; obtained extruded granules are crushed to particles with size of not more than 100 mcm; at 2nd stage, a reinforced carbon composite is obtained, for which the current-conducting powder binder obtained at 1st stage, applied in an electrostatic field on one or two sides on a carbon fabric fixed on a current-conducting frame; after spraying, fabric is heated to temperature of 90 °C, binder is melted and impregnates fabric due to low surface tension of melt binder with electrostatic charge on surface; obtained impregnated fabric sheets are collected in a process bag and placed in a vacuum bag; then vacuum is created with residual pressure of 50 mbar in process package, and then starting the temperature rise to 90 °C by passing electric current through the consolidated plate; then process package is cooled, consolidated plate is obtained, it is extracted and used for production of article by method of thermoforming between female die and male die heated to 250 °C. Described is a method of producing a reinforced carbon composite based on an electroconductive powder binder according to claim 1, consisting in the fact that at 1st stage a powder binder is obtained, for which 100 wt.pts. epoxy resin, 25–55 wt.pts. electroconductive filler and stoichiometric amount of solid hardener are taken, mixing them and grinding to obtain a homogeneous powder; obtained mixture is extruded in a twin-screw mixer at temperature of 60 °C—zone I and II, 80 °C—zone III; obtained extruded granules are crushed to particles with size of not more than 100 mcm; at 2nd stage, a reinforced carbon composite is obtained, for which powder binder obtained at step 1 is applied in electrostatic field on one side on carbon fabric laid on metal tooling, and performing reflow at temperature of 90 °C for 10 minutes; then, subsequent layers are laid and sputtered with binder fusion; carbon fabric is cut according to the cutting pattern, which provides the maximum material utilization factor, a vacuum bag is assembled and a vacuum is created with a residual pressure of 50 mbar in the technological bag and then the stepwise temperature rise to 200 °C is started by passing electric current through the coal composite.

EFFECT: avoiding the use of solvents and prolonged high-temperature heating of the binder when producing the prepreg; high heat and electric conductivity, high mechanical properties of the obtained carbon plastic.

3 cl, 16 ex