METHOD OF PRODUCING SPINNING MIXED SOLUTIONS OF CELLULOSE AND COPOLYMER PAN IN N-METHYLMORPHOLINE-N-OXIDE (VERSIONS) Russian patent published in 2019 - IPC D01D1/00 D01F8/00 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering, in particular to a method of producing spinning solutions of cellulose and a copolymer of acrylonitrile (PAN) in N-methylmorpholine-N-oxide (MMO), and can be used in production of fibers and threads. Method of producing spinning mixed solutions of cellulose and copolymer of polyacrylonitrile PAN in an organic solvent involves mixing cellulose, a copolymer of PAN and an organic solvent, solid-phase activation of mixture under conditions of shear deformation at vibrating mill for 4 minutes at frequency 50 Hz or in screw mixer at force equal to 5 kgf⋅m, for 10 minutes at room temperature until complete homogenization of mixture and heating of activated mixture until its transition into viscous state at 90–140 °C. Mixing is carried out with a total amount of polymers in mixture of 18–25 wt% and ratio of copolymer PAN of 60–99.5 wt% and cellulose 0.5–40 wt%. Method of producing spinning mixed solutions of cellulose and copolymer of polyacrylonitrile PAN in organic solvent according to the second version involves mixing solvent with copolymer PAN, solid-phase activation under conditions of shear deformation at vibrating mill for 3 minutes at frequency 50 Hz to produce first mixture, mixing the first mixture with cellulose to obtain a mixture of cellulose, a copolymer of PAN and an organic solvent with a total amount of polymers in mixture of 12–18 wt% and cellulose ratio of 85–99.5 wt% and PAN copolymer of 0.5–15 wt%, repeated solid-phase activation at the vibrating mill for 5 minutes at frequency 50 Hz or in a screw mixer at force equal to 5 kgf⋅m, for 10 minutes at room temperature until complete homogenization and heating of activated mixture until its transition into a viscous state at 90–140 °C the organic solvent used in both versions is N-methylmorpholine-N-oxide containing 8–10 wt% water.

EFFECT: obtaining concentrated mixtures of copolymer PAN and cellulose in a wide range of compositions in an environmentally safe common solvent – MMO – with controlled strength and deformation properties of fibers obtained from mixed solutions.

2 cl, 13 ex