1
Andreas Winter, Martin Antberg, Walter Spaleck, Jurgen Rohrmann, Volker Dolle: 2-substituted disindenylmetallocenes, process for their preparation, and their use as catalysts in the polymerization of olefins. Hoechst Aktiengesellschaft, September 8, 1992: US05145819 (246 worldwide citation)

The novel metallocenes of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen, R.sup.5 and R.sup.6 are alkyl or haloalkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n -- is a single- or multi ...


2
Andreas Winter, Martin Antberg, Walter Spaleck, Jurgen Rohrmann, Volker Dolle: Process for the preparation of a high molecular weight olefin polymer. Hoechst Aktiengesellschaft, Connolly and Hutz, September 7, 1993: US05243001 (179 worldwide citation)

A very active catalyst system for olefin polymerization is composed of an aluminoxane and a metallocene of the formula I ##STR1## wherein preferably M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen, R.sup.5 and R.sup.6 are alkyl or haloalkyl, --(CR.sup. ...


3
Andreas Winter, Martin Antberg, Volker Dolle, Jurgen Rohrmann, Walter Spaleck: Process for the preparation of an olefin polymer using metallocenes having specifically substituted indenyl ligands. Hoechst Aktiengesellschaft, Connolly & Hutz, April 19, 1994: US05304614 (170 worldwide citation)

A very active catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I or Ia ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen or alkyl, R.sup.5 and R.s ...


4
Andreas Winter, Volker Dolle, Walter Spaleck: Process for the preparation of polyolefins having a broad molecular weight distribution. Hoechst, Connolly & Hutz, September 27, 1994: US05350817 (96 worldwide citation)

Polyolefins having a molecular weight distribution M.sub.w /M.sub.n of .gtoreq.3 and which may be monomodal, bimodal or multimodal are obtained by polymerization or copolymerization of olefins of the formula RCH.dbd.CHR, in which a catalyst system comprising an aluminoxane and a transition-metal com ...


5
Andreas Winter, Martin Antberg, Walter Spaleck, Jurgen Rohrmann, Volker Dolle: Metallocenes containing ligands of 2-substituted idenyl derivatives, process for their preparation, and their use as catalysts. Hoechst Aktiengesellschaft, Connolly and Hutz, January 4, 1994: US05276208 (87 worldwide citation)

The novel metallocenes of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen, R.sup.5 and R.sup.6 are alkyl or haloalkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n -- is a single- or multi ...


6
Andreas Winter, Jurgen Rohrmann, Martin Antberg, Volker Dolle, Walter Spaleck: Process for the preparation of a syndiotactic polyolefin. Hoechst Aktiengesellschaft, July 21, 1992: US05132381 (75 worldwide citation)

A syndiotactic polyolefin is obtained in a high yield by polymerization or copolymerization of an olefin of the formula R.sup.a --CH.dbd.CH--R.sup.b in the presence of a catalyst consisting of a metallocene of the formula I ##STR1## and an aluminoxane. This polyolefin has a very high syndiotactic in ...


7
Jurgen Rohrmann, Volker Dolle, Andreas Winter, Frank Kuber: Metallocenes having benzo-fused indenyl derivatives as ligands, processes for their preparation and their use as catalysts. Hoechst, Connolly and Hutz, October 3, 1995: US05455366 (72 worldwide citation)

Metallocenes having benzo-fused indenyl derivatives as ligands, processes for their preparation and their use as catalysts A very effective catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably, M ...


8
Andreas Winter, Jurgen Rohrmann, Volker Dolle, Frank Kuber: Process for the preparation of a high molecular weight olefin polymer. Hoechst Aktiengellschaft, Connolly and Hutz, July 12, 1994: US05328969 (66 worldwide citation)

A very active catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 is hydrogen, R.sup.4 to R.sup.6 are alkyl or aryl, --(CR ...


9
Andreas Winter, Martin Antberg, Walter Spaleck, Jurgen Rohrmann, Volker Dolle: Process for the preparation of a syndiotactic polyolefin. hoechst Aktiengesellschaft, Connolly and Hutz, August 24, 1993: US05239022 (60 worldwide citation)

A very active catalyst system for olefin polymerization is composed of an aluminoxane and a metallocene of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen, R.sup.5 and R.sup.6 are alkyl or haloalkyl, --(CR.s ...


10
Andreas Winter, Martin Antberg, Bernd Bachmann, Volker Dolle, Frank Kuber, Jurgen Rohrmann, Walter Spaleck: Process for the preparation of polyolefins. Hoechst Aktiengesellschaft, John M Genova, September 30, 1997: US05672668 (52 worldwide citation)

A process for the preparation of an olefin polymer by polymerization or copolymerization of an olefin of the formula R.sup.a --CH.dbd.CH--R.sup.b, in which R.sup.a and R.sup.b are identical or different and are a hydrogen atom or a hydrocarbon radical having 1 to 14 carbon atoms, or R.sup.a and R.su ...