Patent ID: 11945896
Assignee: W.R. GRACE & CO.—CONN.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A catalyst composition for stereoselective polymerization of propylene comprising:
a combination of a magnesium moiety, a titanium moiety, and an internal electron donor, the internal electron donor comprising:, wherein:
R1 and R4 are each a hydrocarbyl group having from 1 to 20 carbon atoms;
R2 is hydrogen;
R3 is a substituted or unsubstituted hydrocarbyl group having from 5 to 15 carbon atoms, the hydrocarbyl group having a branched or linear structure or comprising a cycloalkyl group having from 7 to 15 carbon atoms;
E1 and E2 are the same or different and selected from the group consisting of an alkyl having 1 to 20 carbon atoms, a substituted alkyl having 1 to 20 carbon atoms, an aryl having 6 to 20 carbon atoms, a substituted aryl having 6 to 20 carbon atoms, and an inert functional group having 1 to 20 carbon atoms and optionally containing heteroatoms;
X1 is NR5 and X2 is O, S, or NR5, or X2 is NR5 and X1 is O, S, or NR5; and
R5 is a hydrocarbyl group having 1 to 20 carbon atoms or is hydrogen.