METHOD FOR SOLID-PHASE HALIDE MODIFICATION OF SYNTHETIC AND NATURAL RUBBER IN A CONTINUOUS-ACTION TWIN-SCREW EXTRUDER Russian patent published in 2019 - IPC C08C19/18 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical modification of elastomers and can be used in production of synthetic elastomers, tires and industrial rubber articles. Chlorine-containing elastomer is obtained by reaction of an elastomer and a chlorine-containing reagent in a continuous-action twin-screw extruder at a temperature in the compounding region of 90–150 °C for 1–3 minutes. Chlorine-containing reagent used is a chlorinated hydrocarbon of general formula C_nH_(2n+2)-xCl_x, where n=20–40; x=10–25. Elastomer is taken in amount of 75–98 pts.wt, and hydrocarbon in amount of 2–25 pts.wt.

EFFECT: simplification of technological process, reduction of stages and time, provision of technological and ecological safety of production, increase of process efficiency.

1 cl, 8 ex