摘要 |
Novel titanium or zirconium complexes containing one and only one cyclic delocalized, anionic, pi -bonded, group, said complexes corresponding to formula (I), wherein: M is titanium or zirconium in the +2 formal oxidation state; L is a group containing a cyclic, delocalized, anionic, pi -system through which the group is bound to M, and which group is also bound to Z; Z is a moiety bound to M via a sigma -bond, comprising boron, or a member of Group 14 of the Periodic Table of the Elements, and also comprising nitrogen, phosphorus, sulfur or oxygen, said moiety having up to 60 non-hydrogen atoms; and X is a neutral, conjugated or nonconjugated diene, optionally substituted with one or more hydrocarbyl groups, said X having up to 40 carbon atoms and forming a pi -complex with M; are catalytically activated for use as addition polymerization catalysts. Preferably, L is an optionally substituted cyclopentadienyl or fused ring cyclopentadienyl group.
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申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
DEVORE, DAVID, D.;CRAWFORD, LENORE, H.;STEVENS, JAMES, C.;TIMMERS, FRANCIS, J.;MUSSELL, ROBERT, D.;WILSON, DAVID, R.;ROSEN, ROBERT, K. |