CATALYST SYSTEMS AND POLYMERISATION PROCESSES Russian patent published in 2012 - IPC C08F2/00 C08F4/646 F25B29/00 B65D88/74 C07C211/65 

FIELD: chemistry.

SUBSTANCE: invention relates to an olefin polymerisation method using multimodal catalyst systems, a method of monitoring ageing of a multimodal catalyst system and to a container or a reservoir. The first method involves (a) preparation of a catalyst system comprising a bisamide catalyst system and a non-bisamide catalyst system; (b) storing the multimodal catalyst system at controlled temperature lower than 1°C; (c) bringing the multimodal catalyst system into contact with C₂-C₄-alpha-olefin during a polymerisation process; and (d) obtaining a multimodal polymer. The second method involves (a) preparation of said catalyst system; and b) transporting said system in a portable reservoir, where the portable reservoir is kept at controlled temperature lower than 1°C or -9°C. The container or reservoir contains a multimodal catalyst system kept at the controlled temperature. The disclosed group of inventions enables to minimise loss of efficiency of the catalyst system during storage/ageing.

EFFECT: result of polymerisation in the presence of said catalyst systems is more predictable and stable for long periods of time.

35 cl, 4 dwg, 6 tbl, 6 ex