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Ralf Zolk, Juergen Kerth, Rainer Hemmerich: Preparation of homopolymers and copolymers of propene using a Ziegler-Natta catalyst system. BASF Akteingesellschaft, Keil & Weinkauf, August 15, 1989: US04857613 (49 worldwide citation)

Polymers of propene are prepared using a Ziegler-Natta catalyst system consisting of (1) a titanium component which is based on a finely divided, shape-imparting silica gel and contains titanium, magnesium, chlorine and a benzenecarboxylic acid derivative, (2) an aluminum component and (3) a silane ...


2
Juergen Kerth, Peter Koelle, Ralf Zolk, Harald Schwager: Process for preparing copolymers of propylene with other 1-alkenes. BASF Aktiengesellschaft, Keil & Weinkauf, April 8, 1997: US05618895 (39 worldwide citation)

Copolymers of propylene with other 1-alkenes, obtainable by gas-phase polymerization of a mixture of propylene and another 1-alkene in the absence of a liquid reaction medium under a pressure of from 15 to 30 bar, at from 60.degree. to 90.degree. C. and with an average holdup time of the polymer of ...


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Juergen Kerth, Rainer A Werner, Ralf Zolk, Klaus Dieter Ruempler, Guenther Schweier, Rudolf Mueller Mall, Wolfgang Gruber: Preparation of propylene/ethylene polymers of the toughened polypropylene type. BASF Aktiengesellschaft, Keil & Weinkauf, December 11, 1990: US04977210 (15 worldwide citation)

Propylene/ethylene block copolymers are prepared by a continuous process in which, in each case in an agitated fixed bed of finely divided polymer from the gas phase, first (I) in a first polymerization zone, propylene is homopolymerized by feeding in a Ziegler-Natta catalyst system consisting of (1 ...


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Ralf Zolk, Juergen Kerth, Rainer Hemmerich: Preparation of homopolymers and copolymers of propene by means of a Ziegler-Natta catalyst system. Keil & Weinkauf, April 9, 1991: US05006620 (11 worldwide citation)

Polymers of propene are prepared by means of a Ziegler-Natta catalyst system composed of (1) a titanium component based on a finely divided shape-dictating silica gel and containing titanium, magnesium, chlorine and a benzenecarboxylic acid derivative, (2) an aluminum component and (3) a silane comp ...


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Harald Schwager, Peter Koelle, Rueger Schlund, Ralf Zolk, Juergen Kerth, Guenther Schweter, Klaus Dieter Hungenberg, Werner Schoene: Propylene polymers having a broad molecular weight ratio Q. BASF Aktiengesellschaft, Keil & Weinkauf, July 16, 1996: US05536789 (10 worldwide citation)

Propylene polymers have a molecular weight ratio Q (M.sub.w /M.sub.n) of from 6 to 30 and are obtainable by Ziegler-Natta polymerization in the presence of hydrogen as molecular weight regulator and are particularly suitable for the production of films and moldings.


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Juergen Kerth, Ralf Zolk, Rainer Hemmerich: Preparation of homopolymers and copolymers of propene using a Ziegler-Natta catalyst system. BASF Aktiengesellschaft, Keil & Weinkauf, November 10, 1992: US05162465 (8 worldwide citation)

Polymers of propene are prepared using a Ziegler-Natta catalyst system consisting of (1) a titanium component which is based on a finely divided, shape-imparting silica gel and contains, in addition to titanium, magnesium, chlorine and a benzenecarboxylic acid derivative, (2) an aluminum component a ...


8
Rainer A Werner, Ralf Zolk: Preparation of homo- and copolymers of propene using a Ziegler-Natta catalyst system. BASF Aktiengesellschaft, Keil & Weinkauf, June 27, 1989: US04843132 (4 worldwide citation)

Polymers of propene are prepared using a Ziegler-Natta catalyst system consisting of (1) a titanium component which contains titanium, magnesium, chlorine and a benzenecarboxylic acid derivative on a carrier, (2) an aluminum component and (3) a silane component. The process employs a titanium compon ...


9
Harald Schwager, Peter Koelle, Juergen Kerth, Ralf Zolk: Zieger-natta-type catalyst systems. November 24, 1992: US05166113 (3 worldwide citation)

Ziegler-Natta-type catalyst systems containing, as active constituents,


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Juergen Kerth, Harald Schwager, Ralf Zolk: Preparation of propylene-ethylene copolymers. Keil & Weinkauf, September 15, 1992: US05147928 (2 worldwide citation)

Propylene-ethylene copolymers are prepared in an agitated bed of solids by first polymerizing propylene from the gas phase in a first polymerization zone at 20-40 bar and 60.degree.-90.degree. C. by addition of a Ziegler-Natta catalyst system, and copolymerizing in a second polymerization zone at 7- ...