METHOD OF OBTAINING POLYOLEFIN COMPOSITION Russian patent published in 2019 - IPC B29B7/60 

FIELD: chemical industry.

SUBSTANCE: invention relates to a method for the continuous production of a polyolefin composition. Method of continuously producing a polyolefin composition in the extruder comprising: polyolefin and a carbon black, comprises the following steps. Submission to the mixing device of polyolefin in the form of polyolefin powder and carbon black. Measuring the flow rate of polyolefin powder fed to a mixing device, or measuring the flow rate of polyolefin granules obtained in an extruder. Correction of the flow of carbon black into the mixing device in response to the measured flow rate of polyolefin powder or the adjustment of the flow of polyolefin powder into the mixing device in response to the measured flow rate of polyolefin granules. Melting and homogenizing the mixture in an extruder. Granulation of the molten polyolefin composition.

EFFECT: invention allows to achieve a uniform distribution of additives in polyolefin compositions, provides high accuracy of dosing and results in polyolefin compositions, where there are no or only minor deterioration of the properties of the polymer due to the addition of carbon black.

15 cl, 1 dwg