Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2005-09-06
2005-09-06
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...
C526S127000, C526S134000, C526S170000, C526S943000, C502S103000, C502S117000, C502S152000, C502S154000
Reexamination Certificate
active
06939928
ABSTRACT:
The metallocene compound according to the invention and the olefin polymerization catalyst containing the compound are intended to produce a catalyst capable of preparing an isotactic polymer with a high polymerization activity. The metallocene compound contains a substituted cyclopentadienyl group and a (substituted) fluorenyl group and has a structure wherein these groups are bridged by a hydrocarbon group or the like. The process for preparing a metallocene compound according to the invention is intended to selectively prepare a specific metallocene compound so as not to produce an isomer, and in this process an intermediate product is synthesized by a specific method. The process for preparing a polyolefin according to the invention is intended to prepare a polyolefin having excellent impact resistance and transparency, and this process comprises homopolymerizing an α-olefin of 3 to 8 carbon atoms or copolymerizing an olefin of 3 to 8 carbon atoms and another α-olefin in the presence of an olefin polymerization catalyst containing the above-mentioned metallocene compound.
REFERENCES:
patent: 6184318 (2001-02-01), Razavi et al.
patent: 6469188 (2002-10-01), Miller et al.
patent: 6515086 (2003-02-01), Razavi
patent: 0-503-422 (1992-09-01), None
patent: 0-610-847 (1994-08-01), None
patent: 0-747-406 (1996-12-01), None
patent: 0-848-022 (1998-06-01), None
patent: 05-59077 (1993-03-01), None
patent: 10101689 (1998-04-01), None
patent: 0-754-698 (1997-01-01), None
patent: WO 97/36937 (1997-10-01), None
patent: WO 98/02470 (1998-01-01), None
patent: WO 98/54230 (1998-12-01), None
patent: WO 99/02569 (1999-01-01), None
patent: WO 99/14219 (1999-03-01), None
U.S. Appl. No. 60/150,083.
Alt et al., J. Organometallic Chemistry 568 (1998) 87-112.
Yano et al., Macromol. Chem. Phys. 200 (1999) 1542-1553.
Angermund, Klaaus et al: “The role of intermediate chain migration in propene polymerization using substituted {iPr(CpFlu)}ZrC12/MAO catalysts” Macromol. Rapid Commun. (Feb. 2000), 21(2), 91-97.
Yano, Akihiro et al: “Ethylene/1-hexene copolymerization with Ph2C(Cp) (Flu) ZrC12 derivatives. Correlation between ligand structure and copolymerization behavior at high temperature” Macromol. Chem. Phys. (1999), 200(6), 1542-1553.
Ruchatz, Dieter et al: “Ethene-Norbornene Copolymerization with Homogeneous Metallocene and Half-Sandwich Catalysts: Kinetics and Relationships between Catalyst Structure and Polymer Structure. 4. Development of Molecular Weights” Macromolecules (1998), 31(15), 4684-4686.
Alt Helmut G. et al: “ansa-Metallocene complexes of type (C13H8-SiR2-C9H6-nR′n)ZrC12 (n=0, 1; R=Me, Ph, alkenyl; R′=alkyl, alkenyl): self-immobilized catalysts for ethylene polymerization” J. Organomet. Chem. (1998), 562(2), 229-253.
Alt, Helmut G. et al: “C1-Bridged fluorenylidene-indenylidene complexes of type (C13H8-CR2-C9H6-nR′n)ZrC12 (n=0, 1; R=Me, Ph, butenyl; R′alkyl, alkenyl) as metallocene catalysts for ethylene polymerization” J. Organomet. Chem. (1998), 562(2), 153-181.
Peifer, Bernd et al: “Self-immobilized metallocene catalysts” J. Organomet. Chem. (1988), 553(1-2), 205-220.
Stehling, U.M. et al: “ Stereospecific polymerization of functionalized olefins with metallocene catalysts” Polym. Mater. Sci. Eng. (1997), 76, 244-245.
Spaleck, Walter et al: “Stereospecific metallocene catalysts: scope and limits of rotational catalyst design” Macromol. Symp. (1995), 89(Synthetic, Structural and Industrial Aspects 0 Stereopecific Polymerization), 237-247.
Razavi, Abbas et al: “Preparation and crystal structures of the complexes (.eta. 5-C5H3Me-CMe2-.eta.5-C13H8)MC12 (M=Zr or Hf): mechanistic aspects of the catalytic formation of a syndiotactic-isotactic stereoblock-type Polypropylene” J. Organomet. Chem. (1995), 497(1-2), 105-111.
Cavallo, Luigi et al: “A possible model for the stereospecificity in the syndiospecific polymerization of propene with group 4a metallocenes” Macromolecules (1991), 24(8), 1784-1790.
Kaneyoshi Hiromu
Kawahara Nobuo
Kawai Koji
Michiue Kenji
Mori Ryoji
Burns Doane , Swecker, Mathis LLP
Mitsui Chemicals Inc.
Rabago Roberto
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