Supported olefin polymerization catalyst

Details Supported olefin polymerization catalyst Supported olefin polymerization catalyst

2008-07-02

2010-10-12

Rábago, Roberto (Department: 1796)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

C502S132000, C502S152000, C502S155000, C526S148000, C526S153000, C526S161000

Reexamination Certificate

active

07811956

ABSTRACT:
A supported catalyst system comprises (a) a dehydrated support material, (b) a transition metal compound, and (c) an activator and is characterised in that the support material has been pretreated with at least two different organoaluminum compounds prior to content with either or both the transition metal-compound or the activator. The prefer transition metal compound is a metallocene and the supported catalyst systems are suitable for the preparation of polymers having broad molecular weight distributions and improved melt strength.

REFERENCES:
patent: 5006500 (1991-04-01), Chang
patent: 6475945 (2002-11-01), Carnahan et al.
patent: 6812303 (2004-11-01), Matsushita et al.
patent: 2003/0195306 (2003-10-01), Tsuie et al.
patent: WO 97/43323 (1997-11-01), None
patent: WO 00/15672 (2000-03-01), None

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