METHOD OF OBTAINING ANTI-TURBULENT ADDITIVE, METHOD OF MILLING POLYALPHAOLEFIN FOR IT AND ANTI-TURBULENT ADDITIVE Russian patent published in 2017 - IPC C08J3/205 C08F10/00 C08F10/14 C10L1/16 F17D1/08 

FIELD: chemistry.

SUBSTANCE: method of obtaining the anti-turbulent additive includes (co) polymerisation of polyolefin in bulk, possibly pre-grinding, cryogenic grinding, heating the mixture to room temperature, introducing an anti-agglomerator into polyalphaolefin before preparing a suspension, mixing grinded polyalphaolefin particles with suspending liquid to form the suspension. As an anti-agglomerator, a copolymer of vinyl acetate and ethylene is taken with vinyl acetate content of 26-40% in the anti-agglomerator copolymer. The anti-agglomerator is introduced during the cryogenic grinding of polyalphaolefin, or during its preliminary and cryogenic grinding, or during cryogenic grinding and immediately after cryogenic grinding, or during the pre-grinding, or during cryogenic grinding and after cryogenic grinding. The total amount of anti-agglomerator is 5-80% by weight of the polyalphaolefin.

EFFECT: dissolution of antiagglomerator in hydrocarbons, including at low temperatures, exclusion of polyalphaolefin agglomeration and therefore elimination of "cold flow" effect of polyalphaolefin over a wide range of ambient temperatures, including at elevated temperatures, and elimination of co-crystallization of antiagglomerator with paraffins at low temperatures.

7 cl, 5 ex