| 摘要 |
Provided is a catalyst component for producing a polyolefin, which catalyst component comprises a metallocene catalyst having a structure according to a formula (I): wherein Cp<1> and Cp<2> are each independently a cyclopentadienyl derivative which may be substituted or unsubstituted and are selected from cyclopentadienyl groups, indenyl groups and fluorenyl groups, provided that at least one of the cyclopentadienyl derivatives comprises an N atom or a P atom in it cyclopentadienyl ring; R" is a structural bridge to impart stereorigidity between Cp<1> and Cp<2>; and when only one of Cp<1> and Cp<2> comprises a P atom in its cyclopentadienyl ring, R" is attached to that phosphorous atom, or is attached to a carbon atom in the cylopentadienyl ring distal to that phosphorous atom; and when one of Cp<1> or Cp<2> comprises an indenyl group and the other of Cp<1> and Cp<2> comprises an indolyl group, R" is attached either directly to the N atom of the indolyl group or to a carbon atom that is vicinal to the N atom; M is a metal from Group IIIB, IVB, VB or VIB; Q is a hydrocarbyl group having from 1-20 carbon atoms, or a halogen; and p is the valence of M minus 2. |
