METHOD OF PRODUCING CROSS-LINKED POLYCAPROAMIDE COPOLYMER Russian patent published in 2012 - IPC C08G69/48 D06M14/16 

FIELD: chemistry.

SUBSTANCE: disclosed is a method of producing a graft copolymer of polycaproamide by treating polycaproamide fibre with a redox system, a glycidyl methacrylate monomer while heating and with ratio of the weight of the fibre to the weight of the treating solution equal to 1:30, washing and drying, where the redox system used is Fe²⁺-H₂O₂, and after drying the graft copolymer of polycaproamide is treated with 5-20% aqueous solution of phenoxymethyl phosphonic acid while heating to 60-80°C for 1-1.5 hours, followed by washing and drying.

EFFECT: increasing phosphorus in the graft polymer, which leads to high static exchange capacity of the fibre sorbent.

1 cl, 1 tbl, 5 ex