Patent
Indenyl compounds and catalyst components for the polymerization of olefins.
Johannus Antonius Maria V Beek,Johannes G. de Vries,Henricus Johannes Arts,Radjindrakumar Persad,Gerardus Henricus Josephus Van Doremaele +4 more
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TLDR
In this article, an indenyl compound of the general formula: R'Ind-M-(Cp)Qk in which the symbols have the following meanings: Ind: an IND group, R': a substituent, other than hydrogen, to the Ind group, Cp: a cyclopendadienyl group, M: a transition metal from group 3, 4, 5 or 6 of the Periodic System of Elements, Q: a ligand to M and k is an integer linked to the valence of M.Abstract:
The invention relates to an indenyl compound of the general formula: R'Ind-M-(Cp)Qk in which the symbols have the following meanings: Ind: an indenyl group, R': a substituent, other than hydrogen, to the Ind group, Cp: a cyclopendadienyl group, M: a transition metal from group 3, 4, 5 or 6 of the Periodic System of Elements, Q: a ligand to M and k is an integer linked to the valence of M The invention is characterized in that the R' group is bound to the Ind group at the 2-position The indenyl compound is a catalyst component for the polymerization of olefins The invention also relates to polymers obtainable with such indenyl compoundsread more
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Polymerization catalysts and process for producing bimodal polymers in a single reactor
TL;DR: In this article, an improved method for preparing cyclopentadienyl complexes used to produce polyolefms is also provided, which is used in this paper, as well as an improved approach for synthesizing polyometallocene compounds.
Patent
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TL;DR: In this paper, the authors describe a method for the synthesis of a bimodal molecular weight distribution of ethylene polymers with a first Group 4 metallocene compound comprising bridging η 5 -cyclopentadienyl-type ligands.
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Patent
Olefin polymerization catalysts
TL;DR: In this paper, a Group IV B transition metal component and an alumoxane component are used to polymerize olefins to produce a high molecular weight polymer. But their system is not suitable for high temperature environments.
Patent
Catalysts, method of preparing these catalysts and method of using said catalysts
TL;DR: In this article, a catalyst is prepared by combining a first compound consisting of a bis(cyclopentadienyl) metal compound with a second compound which is an ion exchange compound comprising a cation which will irreversibly react with a ligand on said first component and an anion which is a single coordination complex comprising a plurality of lipophilic radicals covalently coordinated to and shielding a central chargebearing metal or metalloid atom.
Patent
Silicon bridged transition metal compounds
TL;DR: In this paper, a chiral silicon-bridged metallocene catalyst was proposed to polymerize α-olefins to high isotacity with a minimum of inversions at high rates of catalyst activity.
Patent
Process for production of a high molecular weight ethylene α-olefin elastomer with a metallocene alumoxane catalyst
TL;DR: In this article, a process for preparing high molecular weight ethylene-α-olefin elastomers by liquid phase polymerization of the requisite monomers in the presence of a metallocene/alumoxane catalyst system is described.
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Thermal heat pump
TL;DR: In this paper, the authors describe a thermal heat pump consisting of a heat pipe, in which the vapor passage located for heat dissipation between the Warmeubertragungszone for heat supply and the WARMEBERTRTAGZENzone (16) changing an over its length, has the flow velocity of the vapor, first increasing and then degrading cross-section and in which in the area of increased vapor velocity another warmeubertraagung zone with heat supply or removal is the increased vapor velocities may be subsonic or supersonic range.