METHOD OF PRODUCING REACTOR POWDER OF ULTRAHIGH MOLECULAR WEIGHT POLYETHYLENE BY POLYMERISATION OF ETHYLENE Russian patent published in 2015 - IPC C08F10/02 C08F2/06 C08F4/642 C07F7/28 C08F110/02 

FIELD: chemistry.

SUBSTANCE: invention relates to synthesis of reactor powder of ultrahigh molecular weight polyethylene. Described is a method of polymerising ethylene in a medium of aliphatic solvents using a catalyst based on functionalised bis-phenoxy-imine complexes of titanium chloride, activated with methylaluminoxane MAO. The catalyst is prepared in advance in toluene solution. The catalyst system is loaded in toluene solution with two-step loading of a MAO co-catalyst. Half of the calculated amount of MAO is added first without a catalyst. A second portion of MAO is then added with a catalytic complex while stirring intensely. The speed of the mixer increased to 1300 rpm. The catalyst used is one of three functionalised phenoxy-imine titanium halide complexes of the general structure , where (I) R¹=isopropylbenzyl, R²=H; (II) R¹=isopropylbenzyl, R²=Me; (III) R¹=t-Bu, R²=OCH₃.

EFFECT: obtaining reactor powder of ultrahigh molecular weight polyethylene with improved morphology, which enables to process the reactor powder into ultrahigh-modulus and ultrahigh-strength bands and fibres via solvent-free cold moulding.

8 cl, 1 tbl, 12 ex