Metallocene catalysts, their synthesis and their use for the polymerization of olefins
OwnerNicola S. Paczkowski, Andreas Winter +1inventors
InventorsNicola S. Paczkowski, Andreas Winter, Franz Langhauser
Life of this patent
Estimating the term…
Abstract
A process for the preparation of a catalyst system includes the steps of combining a support material with a first composition which includes at least one aluminoxane in a first solvent to provide an aluminoxane loaded support; and, contacting the aluminoxane loaded support with a second composition which includes at least one metallocene compound, a second solvent, and a cocatalyst, wherein the cocatalyst includes a second portion of the at least one aluminoxane alone or in combination with an ionic compound and/or a Lewis acid.
Claims4
1-74. (canceled)
A process for the preparation of a catalyst system, comprising the steps of:
- a) treating a support material such that it has a loss on dryness of less than 0.5 wt % from the original dryness of the support,
- b) combining a support material with a first composition, the first composition comprising a first portion of at least one aluminoxane or mixtures thereof in a first solvent;
- c) heating the combined support material with the first composition to a temperature of from at least 30° C. to about 200° C. to provide an aluminoxane loaded support;
- and,
- d) contacting the aluminoxane loaded support with a second composition, the second composition comprising at least one metallocene compound, a second solvent, which may be the same or different from the first solvent, and a cocatalyst, wherein the cocatalyst includes a second portion of the at least one aluminoxane, which may be the same or different from the first portion of the at least one aluminoxane or mixtures thereof, alone or in combination with an ionic compound and/or a Lewis acid.
Dependencies are inferred from the claim text.