Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Reexamination Certificate
2011-02-22
2011-02-22
Teskin, Fred M (Department: 1762)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
C502S126000, C502S127000, C502S158000, C526S124900, C526S125300, C526S126000, C526S128000
Reexamination Certificate
active
07893003
ABSTRACT:
The present disclosure provides a Ziegler-Natta catalyst composition comprising a procatalyst, a cocatalyst and a mixed external electron donor comprising a first selectivity control agent, a second selectivity control agent, and an activity limiting agent. A polymerization process incorporating the present catalyst composition produces a high-stiffness propylene-based polymer with a melt flow rate greater than about 50 g/10 min. The polymerization process occurs in a single reactor, utilizing standard hydrogen concentration with no visbreaking.
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Dow Global Technologies Inc.
Eng Elizabeth
Teskin Fred M
Whyte Hirschboeck Dudek SC
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