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US 11,254,756 B2Granted
Process for production of high melt flow propylene-based polymer and product from same
AssigneeW.R. Grace & Co.-Conn.
InventorsLinfeng Chen, Tak W. Leung, Tao Tao, Kuanqiang Gao
Life of this patent
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Abstract
Disclosed are catalyst compositions having an internal electron donor which includes a 3,6-di-substituted-1,2-phenylene aromatic diester. Ziegler-Natta catalyst compositions containing the present catalyst compositions exhibit very high hydrogen response, high activity, high selectivity and produce propylene-based olefins with high melt flow rate.
Claims12
A procatalyst composition comprising:
- a magnesium moiety, a titanium moiety, and a substituted-1,2-phenylene dibenzoate having structure (I),
- wherein R1-R14 are the same or different, each of R1 and R4 is a methyl group, at least one of R2 or R3 is hydrogen and at least one is a cyclohexyl group, and each of R5-R14 is selected from hydrogen, a halogen, a hydrocarbyl group having 1 to 20 carbon atoms, or a hydrocarbyloxy group having 1 to 20 carbon atoms.
Dependencies are inferred from the claim text.