Patent ID: 8716417

Claim:
An olefin polymerization catalyst, comprising activated magnesium halide, and a titanium compound supported thereon and having at least one Ti-halide bond, and an internal electron donor selected from one or more estersil compounds as represented by general formula (I): wherein R 1 , R 2 , R 3 , and R 4 independently have between 0 and 20 carbon atoms, are the same or different, and are independently selected from monocyclic ring, polycyclic ring, heteroatom-containing ring, fused ring, aliphatic chain group, halogen, alkoxy, substituted alkyl, acyl, acyloxy, cycloalkyl, aryl, aralkyl or alkylaryl, alkenyl, alkynyl, alkylalkenyl, and alkylalkynyl, wherein the monocyclic ring, polycyclic ring, or heteroatom-containing ring comprises a ring formed by one of R 1 , R 2 , R 3 , and R 4 , a spirocyclic ring formed between at least two of R 1 , R 2 , R 3 , and R 4 , or a ring formed between R 1 or R 2 and at least one of R 3 and R 4 ; wherein, based on total moles of the titanium compound, a molar ratio of Ti/Mg is about 1 to about 200, and a molar ratio of the internal electron donor to magnesium is about 0.1 to about 2.