New Catalyst Concepts for the Polymerization of Ethylene with Metallocenes

  • A. Akimoto
  • A. Yano
Conference paper

Abstract

Diphenylmethylidene(cyclopentadienyl)(2-dimethylamino-fluorenyl)zirconium dichloride (Ph2C(Cp)(2-Me2NFlu)ZrCl2) catalyst activated with dimethylanilinium tetrakis(pentafluorophenyl)borate (Me2PhNH·B(C6F5)4)/triisobutylaluminum (i-Bu3Al) or methylaluminoxane (MAO) produced a high molecular weight polyethylene with a high activity at high temperatures. The molecular weight of the polyethylene was significantly decreased with an increase in the concentration of the aluminum compounds, followed by the formation of vinyl end groups. This phenomenon was not observed for the Ph2C(Cp)(Flu)ZrCl2 based catalysts.

Keywords

Chain Transfer Substituent Group Polymerization Temperature Ethylene Polymerization High Pressure Process 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Reference

  1. [1]
    J. A. Ewen, R. L. Jones, A. Razavi, J. D. Ferrara, J. Am. Chem. Soc. 110, 6255 (1988)CrossRefGoogle Scholar
  2. [2]
    J. A. Ewen, Macromol. Chem., Symp. 89,181 (1995)CrossRefGoogle Scholar
  3. [3]
    A. Akimoto, Metallocene’95, 439 (1995)Google Scholar
  4. [4]
    A. Razavi, J. L. Atwood, J. Organomet. Chem. 459, 117 (1993)CrossRefGoogle Scholar
  5. [5]
    N. Piccolrovazzi, P. Pino, G. Consiglio, A. Sironi, M. Moret, Organometallics 9, 3098 (1990)CrossRefGoogle Scholar
  6. [6]
    I. M. Lee, W. J. Gauthier, J. M. Ball, B. Iyengar, S. Collins, Organometallics 11,2115 (1992)CrossRefGoogle Scholar
  7. [7]
    H. G. Alt, R. Zenk, J. Organomet. Chem. 522, 39 (1996)CrossRefGoogle Scholar
  8. [8]
    K. Thorshaug, E. Rytter, M. Ystenes, Macromol. Chem., Rapid Commun. 18, 715 (1997)CrossRefGoogle Scholar
  9. [9]
    A. Yano, M. Sone, S. Yamada, S. Hasegawa, A. Akimoto, Macromol. Chem., Phys. AcceptedGoogle Scholar
  10. [10]
    R. F. Jordan, W. E. Dasher, S. Eshols, J. Am. Chem. Soc. 108, 1718 (1986)CrossRefGoogle Scholar
  11. [11]
    W. Spaleck, M. Antberg, J. Rohrmann, A. Winter, B. Bachmann, P. Kiprof, J. Behm, W.A. Harrmann, Angew. Chem. Int. Ed. Engl. 31, 1347 (1992)CrossRefGoogle Scholar
  12. [12]
    J. C. W. Chien, B. P. Wang, J. Polym. Sci, Part A, Polym. Chem. 28, 15 (1990)CrossRefGoogle Scholar
  13. [13]
    E. Barsties, S. Schaible, M-H. Prosenc, U. Rief, W. Röll, O. Weyand, B. Dorer, H-H. Brintzinger, J. Organomet. Chem. 520, 63 (1996)CrossRefGoogle Scholar
  14. [14]
    R. Leino, H. J. G. Luttikhedde, P. Lehmus, C-E. Wilen, R. Sjöholm, A. Lehtonen, J. V. Seppälä, J. H. Näsman, Macromolecules 30, 3477 (1997)CrossRefGoogle Scholar
  15. [15]
    B. Rieger, A. Reinmuth, W. Roll, H. H. Brintzinger, J. Mol. Catal. 82, 67 (1993)CrossRefGoogle Scholar
  16. [16]
    A. Rossi, J. Zhang, G. Odian, Macromolecules 29, 2331 (1996)CrossRefGoogle Scholar
  17. [17]
    A. Yano, M. Sone, S. Hasegawa, M. Sato, A. Akimoto, Macromol. Chem., Phys. acceptedGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • A. Akimoto
    • 1
  • A. Yano
    • 1
  1. 1.TOSOH Corporation Yokkaichi Research LaboratoryYokkaichi MieJapan

Personalised recommendations