METHOD OF PRODUCING POLYESTER-KETONES Russian patent published in 2010 - IPC C08G65/40 C08G65/46 

FIELD: chemistry.

SUBSTANCE: polyester-ketone is obtained by reacting potassium diphenolate with 4,4'-dichlorobenzophenone in dimethylsulfoxide at 160-170°C for 4 hours. Subsequent precipitation in isopropyl alcohol and drying to constant mass of the obtained oligomer with degree of condensation equal to 20 is carried out. Further, the oligomer is converted to a dipotassium salt by reacting with an alkaline solution and reaction with 4,4'-difluorobenzophenone is carried out at 170-300°C in an organic solvent medium for 6 hours.

EFFECT: shorter synthesis time and obtaining a cheap end product with high output while using a cheap monomer.

2 cl, 2 ex