Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Reexamination Certificate
1999-10-29
2001-01-30
Bell, Mark L. (Department: 1755)
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
C548S101000, C548S103000, C548S108000
Reexamination Certificate
active
06180788
ABSTRACT:
FIELD OF THE INVENTION
The invention is directed towards tetrahedral and pseudo-tetrahedral late transition metal polymerization catalyst complexes and their use in forming homopolymers from olefins or polar monomers and copolymers from olefins and polar monomers.
BACKGROUND
Polymers and copolymers may be formed from olefinic monomers by using transition metal metallocene catalyst technology. This well-known technology uses catalysts containing early transition metal atoms such as Ti and Zr.
Even though polyolefins formed by such metallocene catalysts posses enhanced properties over polyolefins produced by conventional Ziegler-Natta catalysts, further improvements in properties such as wettability and adhesiveness may be possible. It is believed that including polar monomers in an olefinic polymer or copolymer would improve wettability and adhesiveness in those materials. Unfortunately, polar monomers tend to poison early transition metal catalysts.
Certain late transition metal complexes of palladium and nickel incorporate some polar monomers. However, such catalyst systems are costly. Also, the polymers so produced are highly branched (85-150 branches/1000 carbon atoms) and the functionalities are not in the chain but at the ends of branches. Consequently, they are limited to polar monomer contents ≦ about 15 mol %. Another disadvantage of these systems is that they incorporate only a limited number of polar monomers (e.g. alkyl acrylates and vinyl ketones). Methyl methacrylate and n-butyl vinyl ether are mildly inhibiting or inert.
Consequently, there remains a need for a polymerization catalyst capable of forming olefinic polymers and copolymers and that are effective polymerization catalysts in the presence of polar monomers.
REFERENCES:
patent: 2888448 (1959-05-01), Gresham et al.
patent: 3179649 (1965-04-01), Feay et al.
patent: 3506597 (1970-04-01), Asai et al.
patent: 3558520 (1971-01-01), Kubicek et al.
patent: 3703561 (1972-11-01), L'Eplattenier et al.
patent: 3954664 (1976-05-01), Napier et al.
patent: 4024132 (1977-05-01), L'Eplattenier et al.
patent: 4382872 (1983-05-01), Grinstead
patent: 4471068 (1984-09-01), Haitko
patent: 4477589 (1984-10-01), Van der Hulst et al.
patent: 4740644 (1988-04-01), Eichhorn et al.
patent: 5068310 (1991-11-01), Shaffer
patent: 5266665 (1993-11-01), Hardiman
patent: 5316994 (1994-05-01), Kelsey
patent: 5369073 (1994-11-01), Sommazzi et al.
patent: 5494874 (1996-02-01), Rosen et al.
patent: 5556823 (1996-09-01), Sommazzi et al.
patent: 5707838 (1998-01-01), Takeda et al.
patent: 5707913 (1998-01-01), Schlund et al.
patent: 5750455 (1998-05-01), Chauvin et al.
patent: 5824711 (1999-10-01), Kimock et al.
patent: 5841013 (1998-11-01), Ho et al.
patent: 5981424 (1999-11-01), Durante et al.
patent: 6004952 (1999-12-01), Hayase et al.
patent: 6037297 (2000-03-01), Stibrany et al.
patent: 222414 (1958-07-01), None
patent: 1 520 876 (1970-01-01), None
patent: 2060378 (1972-06-01), None
patent: 25 46 038 (1976-04-01), None
patent: 35 24 629 (1987-01-01), None
patent: 37 18 397 (1988-12-01), None
patent: 0 023 889 (1981-02-01), None
patent: 0560456 (1993-11-01), None
patent: 0560455 (1993-11-01), None
patent: 832319 (1960-04-01), None
patent: 38-4196 (1963-04-01), None
patent: 54-39032 (1979-03-01), None
patent: 55-94329 (1980-07-01), None
patent: 56-22751 (1981-03-01), None
patent: 57-38733 (1982-03-01), None
patent: 63-159362 (1988-07-01), None
patent: 3-275063 (1991-12-01), None
patent: 202139 (1967-09-01), None
patent: 711038 (1980-01-01), None
patent: 96/23010 (1996-08-01), None
Tong et al., Can. J. Chem., vol. 49, No. 21, 3425-3428, Nov. 1971.
Chemical Abstracts vol. 90, 1979, 90:89566, Birchmore et al.
Gadag et al., Indian J. Chem. vol. 16A, No. 8, pp. 703-705, Aug. 1978.
Bhalla et al., Inorg. Chem., vol. 36, No. 14, pp. 2944-2949, Jul. 1997.
Rajiv Bhalla, et al, Inorganic Chemistry, 1997, 36, pp. 2944-2949.
Prakash Chandra Vyas, et al, Chemistry and Industry, Apr. 5, 1980.
Spencer Knapp, et la, J. American Chemical Society, vol. 112, No. 9, 1990, pp. 3452-3464.
Bell Mark L.
Exxon Research and Engineering Company
Pasterczyk J.
Peist Kenneth W.
Purwin Paul E.
LandOfFree
Catalyst compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Catalyst compositions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst compositions will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2497568