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US 8,614,162 B2Granted
Catalyst composition with phosphorus-based donor and method
AssigneeDow Global Technologies LLC
InventorJoseph N. Coalter, III
Life of this patent
Estimating the term…
Abstract
Disclosed are catalyst compositions having an external electron donor which includes one or more of the following compositions: a phosphite, a phosphonite, a pyrophosphite, and/or a diphosphazane. Ziegler-Natta catalyst compositions containing the present external electron donor exhibit strong activity and produce propylene-based olefins with high isotacticity and high melt flow rate.
Claims16
A catalyst composition comprising:
- a procatalyst composition comprising a magnesium moiety;
- a cocatalyst;
- and
- a phosphorus-based external electron donor having the structure (IX)
- wherein R1 and R2 are the same or different and each of R1-R2 is selected from the group consisting of a substituted hydrocarbyl group having 1 to 20 carbon atoms, an unsubstituted hydrocarbyl group having 1 to 20 carbon atoms, and combinations thereof;
- and
- X is an amino group selected from the group consisting of —NH2, —NHR3, and —NR3R4, wherein R3 and R4 are the same or different and each of R3 and R4 is selected from the group consisting of a substituted hydrocarbyl group having 1 to 20 carbon atoms and an unsubstituted hydrocarbonyl group having 1 to 20 carbon atoms.
4 more elements
Dependencies are inferred from the claim text.