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US 11,993,672 B2Granted
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
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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.
Claims14
A catalyst composition comprising:
- a magnesium moiety and a substituted-1,2-phenylene dibenzoate having structure (I),
- wherein:
- R1-R14 are the same or different;
- R1 and R4 are independently selected from the group consisting of C1 to C8 alkyl and C2 to C8 alkenyl;
- one of R2 and R3 is H and the other is a C1 to C20 hydrocarbyl, the hydrocarbyl comprising a cycloalkyl moiety, a cycloalkenyl moiety, or a cycloalkadienyl moiety;
- and
- each of R5-R14 is selected from the group consisting of H, halogen, C1 to C20 hydrocarbyl, and C1 to C20 hydrocarbyloxy.
4 more elements
Dependencies are inferred from the claim text.