Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2006-11-28
2006-11-28
Rabago, Roberto (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S113000, C526S118000, C526S119000, C526S160000, C526S126000, C526S127000, C526S943000
Reexamination Certificate
active
07141632
ABSTRACT:
The present invention provides polymerization catalyst compounds, catalyst systems including these catalyst compounds, and to their use in the polymerization of ethylene and at least one comonomer. In particular, the invention provides a catalyst system comprising a poor comonomer incorporating catalyst compound and a good comonomer incorporating catalyst compound. Preferably, the low comonomer incorporating catalyst compound is a metallocene containing at least one substituted or unsubstituted fused ring cyclopentadienyl based ligand which is substantially directed to the front of the molecule, contains a long bridging group, or which contains a methyl substitution pattern which correlates to poor comonomer incorporation. The invention also provides methods of selecting the poor comonomer incorporating metallocene to pair with the good comonomer incorporating metallocene to produce polymers that are easy to process into a variety of articles, especially polyethylene based film, having enhanced properties.
REFERENCES:
patent: 5359015 (1994-10-01), Jejelowo
patent: 5382630 (1995-01-01), Stehling et al.
patent: 5382631 (1995-01-01), Stehling et al.
patent: 5679812 (1997-10-01), Winter et al.
patent: 5714427 (1998-02-01), Winter et al.
patent: 5786495 (1998-07-01), Resconi et al.
patent: 5886202 (1999-03-01), Jung et al.
patent: 5929264 (1999-07-01), Rohrmann et al.
patent: 5990253 (1999-11-01), van Beek et al.
patent: 6051728 (2000-04-01), Resconi et al.
patent: 6111019 (2000-08-01), Arjunan et al.
patent: 6177377 (2001-01-01), Chien
patent: 6180736 (2001-01-01), Muhle et al.
patent: 6207606 (2001-03-01), Lue et al.
patent: 6214469 (2001-04-01), Sukhadia et al.
patent: 6339134 (2002-01-01), Crowther et al.
patent: 6388115 (2002-05-01), Crowther et al.
patent: 6410659 (2002-06-01), Maddox et al.
patent: 6489413 (2002-12-01), Floyd et al.
patent: 6545105 (2003-04-01), Follestad et al.
patent: 6642400 (2003-11-01), Holtcamp et al.
patent: 6828394 (2004-12-01), Vaughan et al.
patent: 0664301 (1995-07-01), None
patent: 0702030 (1996-03-01), None
patent: 0511665 (1998-07-01), None
patent: 0926169 (1999-06-01), None
patent: WO 98/28350 (1998-07-01), None
patent: WO 00/31088 (2000-06-01), None
patent: WO 00/50466 (2000-08-01), None
patent: WO 03/037938 (2003-05-01), None
Wang, B. et al., “Ethylene polymerizations with disiloxane-bridged indenyl and cyclopentadienyl metallocene catalysts,” Macromol. Chem. Phys. 198 3197-3205 (1997).
Löfgren, B., “New olefin copolymers synthesized by metallocenes,” Recent Res. Devel. in Macromol. Res., 3, 117-131 (1998).
Abstract: He, Dawei et al., “Metallocene polymerization catalyst for high molecular weight polyethylene and preparation thereof” retrieved from STN Database accession No. 131:351801 abstract & CN1149060A (Chemical Institute, Chinese Academy of Sciences, Peop. Rep. China) May 7, 1997.
Herrman, et al., Angew. Chem. 101 (11) 1536 (1989).
Möhring, Petra C., “Homogeneous Group 4 metallocene Ziegler-Natta catalysts: the influence of cyclopentadienyl-ring substituents,” Journal of Organometallic Chemistry 479, 1-29 (1994).
Brintzinger, Hans H., “Stereospecific Olefin Polymerization with Chiral Metallocene Catalysts,” Angew. Chem. Int. Ed. Engl., 34, 1143-1170 (1995).
Soares, João B.P., “Mathematical Modelling and Control of Chemical Composition Distribution of Ethylene/α-Olefin Copolymers Made with Single and Combined Metallocene Catalysts,” Polymer Reaction Engineering 8(3), 241-270 (2000).
Galland, G.B., et al., “Linear low-density polyethylene synthesis promoted by homogeneous and supported catalysts,” Polymer International 48, 660-664 (1999).
Wigum, Hanne, et al., “Structure-Property Transition-State Model for the Copolymerization of Ethene and 1-Hexene with Experimental and Theoretical Applications to Novel Disilylene-Bridged Zirconocenes,” Journal of Polymer Science, Part A: Polymer Chemistry 41(11), 1622-1631 (2003).
Lehtinen, Christel et al. “A Comparison of(η-butCp)2ZrCi2and Other Simple Metallocenes with Bridged Et(Ind)2ZrCl2and Me2Si(Ind)2ZrCl2Catalysts in Ethene/Propene Copolymerization,” European Polymer Journal 33(1), 115-120 (1997).
Suhm, J., “Influence of metallocene structures on ethen copolymerization with 1-butene and 1-octene,” Journal of Molecular Catalysis A: Chemical 128(1-3) 215-227 (1998).
Bruaseth, Ingvild et al. “Dual Site Ethene/I-Hexene Copolymerization with MAO Activated(1,2,4-Me3CP)2ZrCl2and(Me5Cp)2ZrCL2 Catalysts. Possible Transfer of Polymer Chains between the Sites,” Marcromolecules 36(9), 3026-3034 (2003).
Schneider, M.J., et al. “Influence of Indenyl Ligand Substitution Pattern on Metallocene-Catalyzed Ethene Copolymerization with 1-Octene,” Macromolecules 30, 3164-3168 (1997).
Suhm, J., et al. “Temperature Dependence of Copolymerization Parameters in Ethene/1-Octene Copolymerization Using Homogeneous rac-Me2Si(2-MeBenz[e] Ind)2ZrCl2/MAO Catalyst,” Journal of Polymer Science, Part A: Polymer Chemistry 35, 735-740 (1997).
Brintzinger Hans H., “Stereospecific Olefin Polymerization with Chiral Metallocene Catalysts,” Angew.Chem. Int. Ed. Engl. 34, 1143-1170 (1995).
Karol, Frederick J., et al., “Features of Cyclopentadienyl Metal Catalysts for Ethylene Copolymerization in Gas and Liquid Phase” Metalorganic Catalysts for Synthesis and Polymerization 629-642, (Walter Kaminsky, Ed., Springer 1999).
Farley James McLeod
Kao Sun-Chueh
Lue Ching-Tai
McKee Matthew Gary
Szul John F.
Arechederra Leandro
Faulkner Kevin M.
Rabago Roberto
Univation Technologies LLC
LandOfFree
Mixed metallocene catalyst systems containing a poor... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mixed metallocene catalyst systems containing a poor..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mixed metallocene catalyst systems containing a poor... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3699045