Polymerization catalysts

Details Polymerization catalysts Polymerization catalysts

2006-09-05

2006-09-05

Sellers, Robert (Department: 1712)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

C502S155000, C502S152000, C502S153000, C528S313000, C528S314000, C528S319000, C528S356000, C528S380000, C528S389000, C528S410000, C534S015000, C556S012000, C556S018000, C556S020000, C556S021000, C556S022000, C556S023000, C556S404000, C556S410000

Reexamination Certificate

active

07101959

ABSTRACT:
A subject of the present invention is new compounds having a lanthanide and having a tridentate ligand, a process for their preparation and their use in particular as polymerization catalysts.

REFERENCES:
patent: 5202493 (1993-04-01), Burk
patent: 5344948 (1994-09-01), Verkade
patent: 6281154 (2001-08-01), Bertrand et al.
patent: 6303807 (2001-10-01), Bertrand et al.
CAPLUS accession No. 134:72043 for priority application Nos. EP 1999-401584 (Jun. 25, 1999) and PCT WO 2000-FR175 (Jun. 23, 2000) corresponding to the instant application, registry No. 314256-72-9.
Hubert-Pfalzgraf, L.G. et al., “Synthesis and characterization of volatile cerium (IV) hexafluoroisopropoxide complexes. Structure of (hpmdien)2Ce(OCH(CF3)2)6,” Journal of the Chemical Society, Dalton Transactions, 1982, pp. 1929-1932.
Britovsek, G.P. et al., “The search for new-generation olefin polymerization catalysts: life beyond metallocenes,” Angewadte Chemie International Edition, English 1999, pp. 428-447.

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