POLYMER FLUIDITY INDEX MODIFIER Russian patent published in 2020 - IPC C08F2/38 C08F10/00 C08F4/24 

FIELD: chemical or physical processes.

SUBSTANCE: invention relates to a method of modifying the polymer fluidity index. Described is a method of modifying the polyolefin fluidity index, measured according to ASTM D1238-F (190 °C/21.6 kg). Method involves providing olefin monomers, a chromium catalyst and a flow index modifier in a polymerisation reactor. Chromium catalyst is a reduced chromium oxide catalyst. Fluidity index modifier is carbon dioxide and is 0.50–50.00 ppm based on said olefin monomers.

EFFECT: technical result is providing a polyolefin with low pour point, reduced density and high bulk density of the fluidised bed.

3 cl, 7 dwg, 4 tbl, 8 ex