Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2006-05-02
2006-05-02
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...
C526S161000, C526S169100, C526S166000, C526S169000, C526S131000, C526S130000, C526S134000, C526S116000, C526S115000, C526S145000, C526S332000, C526S318000, C526S318500
Reexamination Certificate
active
07037990
ABSTRACT:
A method is provided for the polymerization of olefins substituted with a functional group using a transition metal catalyst that, by virtue of one or more stabilizing groups incorporated within the catalyst structure, “fixes” the stereoconfiguration of each olefinic monomer relative to the transition metal complex during each successive reaction in the polymerization process. The invention substantially reduces the likelihood of olefin rearrangement at the active site of the catalyst during polymerization. In one particular embodiment, the functional group is a polar, electron-donating group and the stabilizing group is a Lewis acid substituent; examples of polymers that can be prepared with such a system include poly(vinyl acetate), poly(vinyl alcohol), and poly(vinyl ethers). Novel complexes and catalyst systems useful in the polymerization method are also provided.
REFERENCES:
patent: 5866663 (1999-02-01), Brookhart et al.
patent: 5880241 (1999-03-01), Brookhart et al.
patent: 6066603 (2000-05-01), Emert et al.
patent: 6090900 (2000-07-01), Turner et al.
patent: 6107422 (2000-08-01), Wang et al.
patent: 6355746 (2002-03-01), Tagge et al.
patent: 6372684 (2002-04-01), Horton et al.
patent: 6436864 (2002-08-01), Tagge
patent: 6506861 (2003-01-01), Wang et al.
patent: 6593440 (2003-07-01), Sen et al.
patent: 6710006 (2004-03-01), De Boer et al.
patent: 6777510 (2004-08-01), Philipp et al.
patent: 6897275 (2005-05-01), Wang et al.
patent: 2002/0032289 (2002-03-01), Wang et al.
patent: 2002/0099155 (2002-07-01), Inoue et al.
patent: 1 134 236 (2000-03-01), None
patent: WO 96/23010 (1996-08-01), None
patent: WO 98/30612 (1998-07-01), None
patent: WO 98/49208 (1998-11-01), None
patent: WO 01/58874 (2001-08-01), None
Albietz et al. Organometallics 1999, 18, 2747-2749.
Johnson et al. (1996), “Copolymerization of Ethylene and Propylene with Functionalized Vinyl Monomers by Palladium(II) Catalysts,”J. Am. Chem. Soc. 118(1):267-268.
Mecking et al. (1998), “Mechanistic Studies of the Palladium-Catalyzed Copolymerization of Ethylene and β-Olefins with Methyl Acrylate,”J. Am. Chem. Soc. 120(5):888-899.
Ramakrishnan et al. (1990), “Poly(5-hydroxyoctenylene) and Its Derivatives: Synthesis via Metathesis Polymerization of an Organoborane Monomer,”Macromolecules 23(21):4519-4524.
Ono Hiroyuki
Tagge Christopher D.
Wilson Jr. Robert B.
Lee Rip A.
Nippon Synthetic Chemical Company
Reed I. P. Law Group
Wu David W.
LandOfFree
Transition metal complexes in the controlled synthesis of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transition metal complexes in the controlled synthesis of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transition metal complexes in the controlled synthesis of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3576281