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
Walter Spaleck, Jurgen Rohrmann, Martin Antberg: Process for the preparation of an olefin polymer. Hoechst, Connolly and Hutz, January 11, 1994: US05278264 (192 worldwide citation)

A very effective catalyst system for olefin polymerization consists of a cocatalyst, preferably an aluminoxane, and a metallocene of the formula (I) ##STR1## in which, preferably, M.sup.1 is Zr, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 to R.sup.6 are alkyl, --(CR.sup.8 R.sup.9).sub.m --R.su ...


3
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. ...


4
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 ...


5
Michael Joachim Brekner, Jurgen Rohrmann, Walter Spaleck, Martin Antberg: Process for the preparation of cycloolefin polymers. Hoechst Aktiengesellschaft, February 11, 1992: US05087677 (147 worldwide citation)

Polymers of polycyclic olefins of the formulae I to IV having a viscosity number greater than 20 cm.sup.3 /g and a glass transition temperature above 100.degree. C. are obtained without ring opening at a high polymerization rate and at polymerization temperatures advantageous from the technical poin ...


6
Walter Spaleck, Jurgen Rohrmann, Martin Antberg: Process for the preparation of an olefin polymer. Hoechst Aktiengesellschaft, Connolly and Hutz, July 12, 1994: US05329033 (111 worldwide citation)

A very effective catalyst system for olefin polymerization consists of a cocatalyst, preferably an aluminoxane, and a metallocene of the formula (I) ##STR1## in which, preferably, M.sup.1 is Zr, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 to R.sup.6 are alkyl, --(CR.sup.8 R.sup.9).sub.m --R.su ...


7
Andreas Winter, Martin Antberg, Jurgen Rohrmann: 1-Olefin polymer wax, and a process for the preparation thereof. Hoechst Aktiengesellschaft, October 9, 1990: US04962262 (98 worldwide citation)

1-Olefin polymer waxes having a very narrow molecular weight distribution, high isotacticity, a narrow grain size distribution and a high bulk density are obtained by means of a catalyst comprising a chiral, stereorigid metallocene compound and an aluminoxane, in the presence of small amounts of hyd ...


8
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 ...


9
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 ...


10
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 ...