Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2005-05-10
2005-05-10
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S172000, C526S160000, C526S170000, C502S104000, C502S103000
Reexamination Certificate
active
06891006
ABSTRACT:
A cationic Group 3 or Lanthanide metal complex for coordination polymerization of olefins is disclosed. The precursor metal complex is stabilized by an anionic amidinate ancillary ligand. Upon reaction with an activator, the complex becomes an active olefin-polymerization catalyst. Some invention processes give narrow polymer polydispersities.
REFERENCES:
patent: 5318935 (1994-06-01), Canich et al.
patent: 5502128 (1996-03-01), Flores et al.
patent: 5707913 (1998-01-01), Schlund et al.
patent: 5723399 (1998-03-01), Takemoto et al.
patent: 6218489 (2001-04-01), Riedel et al.
patent: 6262198 (2001-07-01), Schlund et al.
patent: 6284697 (2001-09-01), Windisch et al.
patent: 6303714 (2001-10-01), Kibino et al.
patent: 6579998 (2003-06-01), Sita et al.
patent: 6627574 (2003-09-01), Eisen et al.
patent: 0687693 (1995-06-01), None
patent: 9905154 (1999-02-01), None
patent: 0012568 (2000-03-01), None
Bambirra et al. Organometallics 2000, 19, 3197-3204.*
Aubrecht et al. J. Poly, Sci. A: Polym. Chem. 2001, 39, 284-293.*
Duchateau et al. J. Am. Chem. Soc. 1993, 115, 4931-4932.*
Duchateau et al. Organometallics 1996, 15, 1656-1661.*
Littke et al. Organometallics 1998, 17, 446-451.*
D. H. McConville et al.,Polymerization of α-Olefins by Chelating Diamide Complexes of Titanium, Macromolecules 1996, 29, 5241-5243.
Robbert Duchateau, Cornelis T. van Wee and Jan H. Teuben,Insertion and C-H Bond Activation of Unsaturated Substrates by Bis(benzamidinato)ytrium Alkyl, [PhC(NSiMe3)2]2YR(R=CH2Ph·THF, CH(SiMe3)2),and Hydrido, {[PhC(NSiMe3)2]2Y(μ-H)}2, Compounds, 1996, Organometallics, 15, 2291-2302.
Katherine B. Aubrecht, Karen Chang, Marc A. Hillmyer, William B. Tolman,Lactide Polymerization Activity of Alkoxide, Phenoxide, and Amide Derivatives of Yttrium(III)Arylamidinates, Journal of Polymer Science, Part A: Polymer Chemistry 92000), 2001 39(2), 284-293.
Bambirra Sergio De Araujo
Hessen Bart
ExxonMobil Chemical Patents Inc.
Lee Rip A
Wu David W.
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