Addition of aluminium alkyl for improved metallocene catalyst. EPO Patent 0426638-A2

0426638-A2 is referenced by 100 patents and cites 3 patents.

The invention is for a catalyst system for polymerization of olefins using an ionic mettallocene catalyst with aluminum alkyl. The metallocene catalyst is an ion pair formed from a neutral metallocene compound and an ionizing compound. The invention can be used in any method of producing ionic metallocene catalyst. Use of aluminum alkyl with an ionic metallocene catalyst eliminates the need for using methylaluminoxane (MAO). Catalysts produced by the method of this invention have high activity. The invention reduces catalyst poisons which cause low activity, no activity or uncontrolled polymerizations. Polymerizations using this catalyst system are reproducible and controllable.

Title
Addition of aluminium alkyl for improved metallocene catalyst.
Application Number
EP19900870175 19901009
Publication Number
0426638 (A2)
Application Date
October 9, 1990
Publication Date
May 8, 1991
Inventor
Elder Michael J
US
Ewen John A
US
Assignee
Fina Technology
US
IPC
C08F 10/00
C08F 04/608
C08F 04/602
C08F 10/00
C08F 04/00
C07F 17/00
C08F 10/00
C08F 04/76
C08F 04/6592
C08F 04/657
C08F 04/602
C08F 04/60
C07F 17/00
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Citations: 100 (view full list)

  1. Howard W Turner, Gregory G Hlatky, Richard R Eckman: Ionic metallocene catalyst compositions. Exxon Chemical Patents, M Susan Spiering, Myron B Kurtzman, Ben C Cadenhead, March 30, 1993: US05198401 (428 worldwide citation)
  2. Gregory G Hlatky, Howard W Turner: Catalyst system of enhanced productivity. Exxon Chemical Patents, B C Cadenhead, M B Kurtzman, M S Spiering, October 6, 1992: US05153157 (383 worldwide citation)
  3. Junichi Imuta, Takashi Ueda, Yoshihisa Kiso, Akira Mizuno, Masaaki Kawasaki, Mikio Hashimoto: Propylene polymer, propylene copolymer, and propylene elastomer prepared using novel bridged indenyl containing metallocenes. Mitsui Petrochemical, Sherman and Shalloway, April 2, 1996: US05504172 (231 worldwide citation)
  4. Robert C Brady III, Frederick J Karol, Timothy R Lynn, Robert J Jorgensen, Sun Chueh Kao, Eric P Wasserman: Gas phase polymerization reactions utilizing soluble unsupported catalysts. Union Carbide Chemicals & Plastics Technology Corporation, M N Reinisch, May 31, 1994: US05317036 (201 worldwide citation)
  5. Gregory G Hlatky, Howard W Turner: Catalyst system of enhanced productivity. Exxon Chemical Patents, M Susan Spiering, Myron B Kurtzman, August 31, 1993: US05241025 (182 worldwide citation)
  6. Howard W Turner, Gregory G Hlatky, Henry W H Yang, Avinash C Gadkari, Gary F Licciardi: Block copolymers from ionic catalysts. Exxon Chemical Patents, C L Bell, M B Kurtzman, M S Spiering, February 21, 1995: US05391629 (170 worldwide citation)
  7. Allen R Siedle, William M Lamanna: Tris(pentafluorophenyl)borane complexes and catalysts derived therefrom. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, Carolyn V Peters, March 22, 1994: US05296433 (128 worldwide citation)
  8. Howard W Turner: Ionic metallocene catalyst compositions. Exxon Chemical Patents, Myron B Kurtzman, William G Muller, February 4, 1997: US05599761 (110 worldwide citation)
  9. Daisuke Fukuoka, Takashi Tashiro, Koji Kawaai, Takashi Ueda, Yoshihisa Kiso, Akira Mizuno, Masaaki Kawasaki, Masaaki Itoh, Mikio Hashimoto: Propylene polymer, copolymers and elastomer. Mitsui Chemicals, Sherman and Shalloway, August 10, 1999: US05936053 (77 worldwide citation)
  10. Terunori Fujita, Yasushi Tohi, Makoto Mitani, Shigekazu Matsui, Junji Saito, Masatoshi Nitabaru, Kiyoaki Sugi, Haruyuki Makio, Toshiyuki Tsutsui: Olefin polymerization catalysts, transition metal compounds, processes for olefin polymerization, and &agr;-olefin/conjugated diene copolymers. Mitsui Chemicals, Birch Stewart Kolasch & Birch, October 30, 2001: US06309997 (73 worldwide citation)

References: 3

  1. Welborn Howard Curtis Jr: Supported polymerization catalyst.. Exxon Chemical Patents, December 30, 1986: EP0206794-A1 (94 worldwide citation)
  2. Turner Howard William: Catalysts, method of preparing these catalysts and method of using said catalysts.. Exxon Chemical Patents, August 3, 1988: EP0277004-A1 (273 worldwide citation)
  3. US3709853