METHOD OF PRODUCING A HIGHLY-FILLED POLYOLEFIN COMPOSITION WITH MODIFYING ADDITIVES Russian patent published in 2020 - IPC C08L23/06 C08J3/20 

FIELD: technological processes.

SUBSTANCE: invention relates to production and processing of high-filled polyolefin compositions based on high-pressure polyethylene (HPPE) of different grades, specifically to a method of producing a composition, which can be used in construction, for production of molded shaped articles, in cable equipment, for example, for production of structural materials of cable filling and in other industries of national economy. Method of preparing the composition involves adding a modified modifying additive in amount of 3 wt % to the polymer matrix. Then calcium carbonate filler is added in amount of 50–60 wt %. Polymer matrix used is high-pressure polyethylene. Modifying additive is a concentrate containing calcium stearate and stearic acid, taken in mass ratio 2:1, with their total content of 20 wt %.

EFFECT: invention enables uniform distribution of components in the mixture and production of a highly-filled polyethylene composition with high value of relative elongation.

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