Enhanced procatalyst composition and process

摘要

Disclosed herein are processes for preparing procatalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present procatalyst compositions improve catalyst selectivity and also increase the bulk density of the formant polymer.

主权项

1. A procatalyst composition comprising:
particles comprising a magnesium moiety, a titanium moiety, and an internal electron donor comprising a substituted 1,2-phenylene aromatic diester; wherein the substituted 1,2-phenylene aromatic diester has the structure (I):wherein R1-R14 are the same or different, each of R1-R14 is selected from hydrogen, a halogen, a hydrocarbyl group having 1-20 carbon atoms and an alkoxy group having 1 to 20 carbon atoms, and combinations thereof; and at least one of R1-R14 of structure (I) is not hydrogen; and
the particles having a D50 from about 10 μm to about 25 μm.