1
Herrmann Hans Friedrich, Boehm Ludwig, Voigt Hartmut, Spaleck Walter, Hohner Gerd: Process for the preparation of polyolefin waxes.. Hoechst, December 1, 1993: EP0571882-A2 (52 worldwide citation)

Polymerisation of olefins in a low-boiling suspension medium, in particular propane, in the presence of a metallocene catalyst gives polyolefin waxes which can be used without further work-up steps.


2
Berthold Joachim Dr, Boehm Ludwig Dr, Breuers Werner Dr, Enderle Johannes Friedrich Dr, Fleissner Manfred Dr, Lecht Rainer Dr, Lueker Hartmut Dr, Schulte Ulrich Dl, Broemstrup Heiner Dl: Tube made from polyethylene having improved mechanical properties. Hoechst, October 30, 1996: EP0739937-A2 (41 worldwide citation)

High-strength tubing made of ethylene polymer (PE) with a bimodal mol. wt. distribution is claimed. It has stress cracking resistance >= 1400 h and fracture toughness >= 7 mJ/mm.


3
Spaleck Walter Dr, Antberg Martin Dr, Boehm Ludwig Dr, Rohrmann Juergen Dr, Lueker Hartmut Dr: Process for preparing ethylenpolymers.. Hoechst, November 28, 1990: EP0399348-A2 (37 worldwide citation)

The preparation of polyethylene and ethylene-1-olefin copolymers in suspension or gas-phase processes with the aid of metallocene/aluminoxane catalysts whose metallocene component is a bridged biscyclopentadienyl complex has particular advantages. The use of these complexes gives, with high activity ...


4
Hess Reiner Dr, Voigt Hartmut, Herrmann Hans Friedrich Dr, Boehm Ludwig Dr: Process for the préparation of polyolefin waxes.. Hoechst, June 22, 1994: EP0602509-A2 (19 worldwide citation)

Polymerisation of olefins in a low-boiling suspension medium, in particular propane, and dissipation of the heat of reaction by evaporative cooling in the presence of a metallocene catalyst gives polyolefin waxes without wall deposits being able to impair the cooling of the reactor.


5
Spaleck Walter Dr, Antberg Martin Dr, Boehm Ludwig Dr, Rohrmann Juergen Dr, Lueker Hartmut Dr: Process for preparing ethylene polymers. Hoechst, March 13, 1996: EP0700937-A2 (15 worldwide citation)

A process is claimed for the prodn. of ethylene polymers (I) by polymerisation of ethylene (B) or copolymerisation of (B) with 3-20C 1-olefins at -60 to 200 deg.C and and 0.5-200 bar, in soln. suspension or gas phase, in the presence of a catalyst comprising a metallocene as transition metal compone ...


6
Herrmann Hans Friedrich Dr, Boehm Ludwig Dr: Process for preparing a polyolefin.. Hoechst, December 4, 1991: EP0459320-A2 (14 worldwide citation)

Olefins of the formula R-CH=CH-R (R and R = H or C1-C20-alkyl) are polymerised in the presence of a catalyst comprising an aluminoxane and a metallocene of the formula I or II (R and R = halogen or hydrocarbon radicals; R and R = hydrocarbon radicals which can form a sandwich structure with M; R = a ...


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8
Bilda Dieter Dr, Boehm Ludwig Dr: (co)Polymerization of ethylene into ultrahighmolecular weight ethylene polymers.. Hoechst, December 29, 1993: EP0575840-A1 (8 worldwide citation)

Reaction of a Grignard compound with a halogenating agent, a titanium compound, a perhalogen compound and an electron-donor compound followed by comminution of the resultant solid to a mean particle size of from 0.5 to 5 mu m gives a catalyst component which, together with an organoaluminium compoun ...


9
Boehm Ludwig Dr, Enderle Hans Frieder Dr, Jastrow Horst Dr: Polyethylene moulding composition.. Hoechst, December 9, 1992: EP0517222-A2 (7 worldwide citation)

A polyethylene moulding composition which comprises from 50 to 80% by weight of a HD polyethylene having a very broad bimodal molecular weight distribution and from 20 to 50% by weight of an LLD polyethylene or LD polyethylene, gives pipes, sheets and films having very good long-term and low-tempera ...


10
Heinrich Andreas Dr, Boehm Ludwig Dr, Scholz Hans Albrecht: (co)Polymers.. Hoechst, February 10, 1993: EP0526891-A1 (5 worldwide citation)

Zur Homopolymerisation von Ethylen oder zur Copolymerisation von Ethylen mit anderen 1-Olefinen wird ein Katalysator verwendet, welcher aus einem Aluminiumtrialkyl und dem Gesamtprodukt aus der Reaktion eines in einem inerten Lösemittel gelösten, suspendierten oder als Gel dispergierten Magnesiumalk ...