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US 9,434,796 B2Granted
Catalyst composition with alkoxyalkyl ester internal electron donor and polymer from same
AssigneeW. R. Grace & Co.-Conn.
InventorsLinfeng Chen, Kelly Gonzalez
Life of this patent
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Abstract
Disclosed herein are catalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present catalyst compositions include an internal electron donor with a compounded alkoxyalkyl ester and optionally a mixed external electron donor. The present catalyst compositions improve catalyst selectivity, improve catalyst activity, and/or improve hydrogen response. Propylene-based polymer produced from the present catalyst composition has a melt flow rate greater than 10 g/10 min.
Claims10
A polymerization process comprising:
- (A) contacting, under polymerization conditions, propylene and optionally one or more comonomers with a catalyst composition comprising a procatalyst composition comprising a combination of a magnesium moiety, a titanium moiety and greater than 4.5 wt % of a compounded alkoxyalkyl ester;
- a cocatalyst;
- and
- an external electron donor;
- and
- (B) forming a propylene-based polymer.
3 more elements
Dependencies are inferred from the claim text.