LATENT MATALLOCENE CATALYTIC SYSTEMS FOR POLYMERIZATION Russian patent published in 2007 - IPC C08F2/42 C08F2/40 C08F4/64 C08F10/00 

FIELD: polymerization catalysts.

SUBSTANCE: invention provides a method for temporary and reversible passivation of active matallocene catalytic system, which method is accomplished by contacting this catalytic system with unsaturated hydrocarbon selected from group consisting of C₄-C₁₄-alkines, C₄-C₁₄-alkenes, and polycyclic alkenes containing non- reactive β-hydrogen. Also proposed is method of polymerization of C₂-C₁₄-olefins comprising (i) a step wherein above-mentioned passivated catalytic system is supplied in amount of about 1 to about 5 equivalents per 1 equivalent zirconium in common with at least one C₂-C₁₄-olefin to polymerization reactor, (ii) a step wherein above-mentioned catalytic system is dispersed in polymerization medium, and (iii) catalytic system reactivation step.

EFFECT: enabled reduction of catalytic system activity to a level, which allows supplying the system to reactor in contact with olefin monomer and properly dispersing catalyst in polymer bed within reactor until catalyst is reactivated.

10 cl, 2 tbl, 22 ex