Catalyst system

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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Details

C526S161000, C526S943000, C526S127000, C526S129000, C526S089000, C502S104000, C502S118000, C502S152000, C502S155000

Reexamination Certificate

active

06949614

ABSTRACT:
A catalyst system comprising a metallocene, a cocatalyst, a support material and optionally a further organometallic compound is described. The catalyst system can advantageously be used for the polymerization of olefins. Here, the use of aluminoxanes such as methylaluminoxane (MAO) as cocatalyst is dispensed with and a high catalyst activity and good polymer morphology are nevertheless achieved.

REFERENCES:
patent: 5348299 (1994-09-01), Clapper, Jr.
patent: 5384299 (1995-01-01), Turner et al.
patent: 5604171 (1997-02-01), Collette et al.
patent: 5792819 (1998-08-01), Erker et al.
patent: 5807936 (1998-09-01), Fritze et al.
patent: 5908903 (1999-06-01), Rösch
patent: 6002032 (1999-12-01), Erker et al.
patent: 6124231 (2000-09-01), Fritze et al.
patent: 6255531 (2001-07-01), Fritz et al.
patent: 6417302 (2002-07-01), Bohnen
patent: 6482902 (2002-11-01), Bohnen et al.
patent: 6537943 (2003-03-01), Fritze et al.
patent: 6576723 (2003-06-01), Bohnen et al.
patent: 2246003 (1999-04-01), None
patent: 19757540 (1999-06-01), None
patent: 19828271 (1999-12-01), None
patent: 0426637 (1991-05-01), None
patent: 474 391 (1992-03-01), None
patent: 510602 (1992-10-01), None
patent: 520 732 (1992-12-01), None
patent: 0558158 (1993-09-01), None
patent: 0619326 (1994-10-01), None
patent: 950 670 (1999-10-01), None
patent: 96/04319 (1996-02-01), None
patent: 96/23005 (1996-08-01), None
Noth, Heinrich et al., “Alkoxyalanes and alkoxyaluminum borohydrides”Z. Anorg. Allg. Chem. 358:44-65, XP-002048656 (1968).
Xinmin Yang et al, “‘Cation-like’ Homogeneous Olefin Polymerization Catalysts Based upon Zirconocene Alkyls and Tris(pentafluorophenyl) borane”J. Am. Chem. Soc. 113:3623-3625 (1991).
Kazuaki Ishihara et al, “Reductive Cleavage of Chiral Acetals Using New Aluminum Catalysts,”Synlett(2):127-127, XP-00093003 (1993).
Brintzinger, H-H et al., “Stereospezifische Olefinpolymerisation mit chiralen Metallocenkatalysatoren,”Agnew. Chem. 107:1255-1283 (1995).
Ito Junichi, “Production of Low-Stereoregular Polypropylene”Pat. Abs. of Japan 1995: No. 10, Abstract of Japanese JP 07 173223 (Tokuyama Corp) (Jul. 11, 1995).
Machida Shuji, “Olefin Polymerization Catalyst and Production of Olefin Using the Same,”Pat. Abs. of Japan 1997: No. 11, Abstract of JP 09 194521 (Idemitsu Kosan Co Ltd) (Jul. 29, 1997).
Sugimura Kenji, “Olefin Polymerization Catalyst and Process for Polymerizing Olefin”Pat. Abs. of Japan 1998: No. 01, Abstract of JP 09 255710 (Mitsui Petrochem Ind Ltd.) (Sep. 30, 1997).
Katayama Hiroaki, “Aluminum Compound, Catalyst for Polymerization Olefin and Production of Olefin Polymer”Pat Abs. of Japan 1999: No. 03, Abstract of JP 10 316695 (Sumitomo Chem Co Ltd) (Dec. 2, 1998).

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