METHOD OF PRODUCING ULTRAHIGH MOLECULAR WEIGHT POLYMERS USING SPECIAL BRIDGED METALLOCENE CATALYSTS Russian patent published in 2010 - IPC C08F10/02 C08F4/6192 C07F17/00 B01J37/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing ultrahigh molecular weight polymers through polymerisation and copolymerisation of olefins using special bridged metallocene catalysts, as well as catalyst systems thereof. Described is a method of producing ultrahigh molecular weight polymers mainly containing polyethylene, involving reaction of ethylene in the presence of a catalyst system containing a bridged metallocene compound, to obtain a polymer having viscometrically determined molecular weight of over 1×10⁶ g/mol. Described is a method of preparing a catalyst system on a support, involving preparation of a mixture of a metallocene compound and a cocatalyst in a solvent or suspending agent, depositing said mixture onto the support, removal of the main portion of solvent or suspending agent, separation of the catalyst system on the support and, if needed, pre-polymerisation of the catalyst system with an olefin monomer to obtain a pre-polymerised catalyst system on a support. Described is use of the catalyst system described above to produce an ultra high molecular weight polymer.

EFFECT: possibility of obtaining an ultrahigh molecular weight polymer using a special bridged metallocene compound and aluminoxane as a cocatalyst without losing activity with respect to the monomer.

20 cl, 1 tbl, 6 ex