METHOD OF PRODUCING COATED CARBON FIBRES AND POLYETHERETHERKETONE COMPOSITION Russian patent published in 2025 - IPC D01F11/14 C08L71/00 C08J5/06 

FIELD: chemistry.

SUBSTANCE: invention relates to production of structural articles in additive technologies. Disclosed is a method of producing a finished carbon fibre by applying a finishing agent, which is a mixture of copolyhydroxyether from 4,4'-dioxyphthalophenone, 4,4'-diphenylolpropane, 3-chloro-1,2-epoxypropane with degree of polymerisation n=80-85 and oligomeric ether ketone based on 4,4'-dioxyphthalophenone and 4,4'-difluorodiphenyl ketone with degree of polymerisation n=5-7, on carbon fibre from a solution with weight concentration of 0.2% in methylene chloride, followed by a stepped increase in temperature to 40 °C and simultaneous distillation of solvent and drying in drying cabinet under vacuum at 46-47 °C.

EFFECT: reduced duration of the carbon fibre finishing process and improved physical-mechanical and rheological properties of the created polyetheretherketone composition.

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