CARBON FIBRE-REINFORCED PLASTIC BASED ON POLYPHENYLENE SULPHIDE BINDER AND METHOD FOR PRODUCTION THEREOF (VERSIONS) Russian patent published in 2024 - IPC C08L81/04 C08J5/24 B29C70/28 

FIELD: chemistry.

SUBSTANCE: invention relates to production of carbon plastics. Described is a carbon fibre-reinforced plastic based on polyphenylene sulphide binder containing a polyphenylene sulphide-based finishing agent with MFI 1250–1750 g/10 min with the following content of components, pts. wt.: carbon fabric – 100, polyphenylene sulphide with MFI 1250–1750 g/10 min – 3–5, polyphenylene sulphide with MFI 150–250 g/10 min – 40–55. Also described is a method of producing said carbon fibre-reinforced plastic based on a polyphenylene sulphide binder, which involves taking a finishing agent powder from low-molecular fractions of synthesis of polyphenylene sulphide with MFI 1250–1750 g/10 min at 1st stage and performing sputtering in electrostatic field on both sides of carbon fabric, which is fixed on current-conducting frame; then carbon fabric is heated to temperature of 325 °C, wherein the finishing agent is melted and impregnates the carbon fabric due to the low surface tension of the melt finishing agent with an electrostatic charge on the surface of the carbon fabric; at 2nd stage, carbon plastic is obtained by spraying polyphenylene sulphide powder with MFI 150–250 g/10 min in an electrostatic field on both sides by sputtering it onto a carbon fabric fixed on a current-conducting frame; then, after sputtering, carbon fabric is heated to temperature of 325 °C, wherein the binder is fused and impregnates the carbon fabric due to the low surface tension of the melt binder with a high-voltage electrostatic charge on the surface; further, the obtained impregnated carbon fabric sheets are collected in a technological package; then, the process package is placed in a vacuum bag and the process package is consolidated; then vacuum is created using vacuum pump with residual pressure of 50 mbar in process package, then the temperature is raised to 325 °C the consolidated technological package placed between the mould die and punch, and creating a moulding pressure of 3 MPa; then the process package is cooled, a consolidated plate is obtained, it is removed and used to obtain an article by thermoforming between the die and the punch of a mould heated to temperature of 325 °C. Described is a method of producing said carbon fibre-reinforced plastic based on polyphenylene sulphide, which consists in using a finishing powder from low-molecular fractions for synthesis of polyphenylene sulphide with MFI 1250–1750 g/10 min and sputtering it in an electrostatic field on one side onto the carbon fabric fixed on the laid metal tooling; then carbon fabric is heated to temperature of 325 °C, wherein uniform distribution, melting of finishing agent and impregnation of carbon fabric is ensured by low surface tension of melt finishing agent; further, polyphenylene sulphide powder with MFI of 150–250 g/10 min is sputtered in a high-voltage electrostatic field on one side onto the finished carbon fabric and heated at temperature of 325 °C; further, laying, finishing and step-by-step sputtering of binder of subsequent layers of carbon fabric is carried out to obtain a technological package, at that, carbon fabric is cut according to cutting chart with provision of possibility of maximum material utilization factor; then vacuum with residual pressure of 50 mbar is created by vacuum pump in mould, in which process package is placed, then temperature is raised to 325 °C and pressing is performed; further, the process package is cooled, the composite article is removed to obtain the declared article.

EFFECT: simplifying the technology for producing carbon fibre reinforced plastic, eliminating the solvent when finishing and producing prepregs, increasing the physical and mechanical characteristics of carbon fibre reinforced plastic.

3 cl, 2 dwg, 16 ex