METHOD OF MANUFACTURING ACRYLIC FIBRES Russian patent published in 2018 - IPC D01D1/02 D01F6/18 D01D5/06 D01F1/02 C08L33/20 

FIELD: chemistry.

SUBSTANCE: invention relates to the chemical engineering of fibrous materials and relates to a method for producing a homogeneous spinning solution for the production of acrylic fibres, which comprises the following steps: i) preparation of a homogeneous suspension by mixing a powder homopolymer or copolymer of acrylonitrile with a mixture of DMSO/water ranging from 94.5%/5.5% to 97%/3% w/w at a temperature ranging from 5 to 10°C, preferably with a mixture of DMSO/water 95/5 at a temperature of 5°C, wherein said mixing is performed for a period of time in the range of from 5 to 30 minutes by spraying a stream of the DMSO/water solvent onto a stream of powder homopolymer or copolymer of acrylonitrile, disaggregated and premixed; ii) heating the homogeneous suspension from step i) to a temperature from 70 to 150°C in a time from 0.5 to 30 minutes until complete dissolution of the homopolymer or copolymer and formation of a homogeneous solution. Spinning solution is then fed to a storage tank or to a spinning line.

EFFECT: process of the present invention makes it easy to combine two steps - polymerisation and spinning.

9 cl, 2 dwg