METHOD FOR INDUSTRIAL PRODUCTION OF MODIFIED POLYMERS AND DEVICE FOR REALISING SAID METHOD Russian patent published in 2010 - IPC C08F8/06 C08C19/28 C08F255/02 C08F291/06 

FIELD: chemistry.

SUBSTANCE: invention describes a method for industrial production of modified polymers in accordance with which a ground polymer undergoes gas-chemical modification in fluidised state using reactive gases, including inert gases and ozone as a gaseous oxidising agent and the obtained activated powder is mixed with a monomer or a group of monomers or a polymer, followed by their copolymerisation through surface-initiated polymerisation in molten stage in an extruder. The method is characterised by that gas-chemical modification is carried out at temperature not higher than 30°C and ozone concentration of 5-15 wt %, while blowing with reactive gases for 10-30 minutes, and polymerisation in the extruder is carried out at 130-230°C, while augers are rotating at 300-500 rpm, L/D of not less than 40, for synthesis of graft and block copolymers with degree of grafting of not less than 80%. The invention also describes a device for realising said method.

EFFECT: cost-effective and environmentally clean industrial method of modifying the surface of polymers with reactive gases with subsequent synthesis of graft and block copolymers through surface-initiated polymerisation.

5 cl, 4 dwg, 5 tbl, 7 ex