| 摘要 |
A process for the polymerisation or copolymerisation of 1-olefins is disclosed, comprising contacting the monomeric olefin under polymerisation conditions in the gas phase with a polymerisation catalyst comprising a complex of formula (I) wherein Y<1> and Y<2> are each independently S, O or N-R; Z is N or P; A<1> to A<3> are each independently N, P or C-R<8>; and each R, each R<8> and R<4> and R<6> are all independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl; M is Fe, Co, Ru or; X represents an atom or group covalently or ionically bonded to the metal M; T is the oxidation state of the metal; and b is the valency of the atom or group X; wherein the partial pressure of the 1-olefin under the polymerisation conditions is from 11 to 20 bar. An improved activity and activity profile is shown compared with the prior art. |
