ADDITIVE FOR POLYOLEFIN POLYMERISATION PROCESSES Russian patent published in 2014 - IPC C08F10/00 C08F2/34 C08F2/44 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of polymerisation. The method of polymerisation includes the following stages: provision of a polymerisation reactor, which includes a gas-phase reactor with a fluidised bed, a carryover zone, supply of a catalyst to introduce a catalytic system, capable of producing an olefin-based polymer, supply of at least one ethylenediimine additive to supply at least one ethylenediimine additive irrespective of the catalyst mixture; (a) contact of at least one olefin with the catalytic system under conditions of polymerisation in the reactor with the fluidised bed; (b) introduction of at least one ethyleneimine additive into the reactor system at any time before, during or after initiation of the polymerisation reaction, with the ethyleneimine additive including polyethyleneimine, the ethyleneimine copolymer ora mixture of the said above; (c) monitoring a level of electrostatic activity in the carryover zone; and (d) quantity of at least one ehyleneimine additive, introduced into the reactor system, is regulated to support the level of electrostatic activity in the carryover zone close to zero or equal to zero. A version of the method is also claimed.

EFFECT: invention ensures prevention, reduction or reverse development of formation of plates resulting in impairment of the polymerisation method continuity.

14 cl, 7 tbl, 9 ex