Patent · US Active

Process for manufacturing high to ultra high molecular weight polymers using novel bridged metallocene catalysts

US8034886B2 · kind B2 · utility

1Cited by

15References

38Claims

0Family size

Assignee

Ticona LLC · US

Inventors

Tim Dickner · Frankfurt, DE
Jens Ehlers · Horst, DE
Jorg Schottek · Frankfurt, DE
Jens Panitzky · Dorsten, DE

Key dates

Filing date	Aug 31, 2009
Grant date	Oct 11, 2011
Priority date	—
Expiry date	Nov 5, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/943
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process of manufacturing high, very high, and ultra high molecular weight polymers comprising predominantly ethylene monomers. Ethylene is reacted in the presence of a catalyst system to produce a polymer having a viscosimetrically-determined molecular weight of at least 0.7×106 g/mol. The catalyst system generally includes a bridged metallocene catalyst compound, optionally with a co-catalyst. The catalyst is characterized by a zirconium dichloride central functionality and a dimethyl silandiyl bridge between five-membered rings of indenyl groups. Both rings of the metallocene compound are substituted at the 2-position with respect to the dimethyl silandiyl bridge with a C1-C20 carbonaceous group.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.