Patent ID: 8394734

Claim:
A solid catalyst for propylene polymerization, wherein the solid catalyst comprises titanium, magnesium, halogen and an internal electron donor mixture of two or more compounds, wherein the internal electron donor mixture comprises at least one donor selected from bicycloalkane dicarboxylates or bicycloalkene dicarboxylates represented by formula (II), formula (III), formula (IV) or formula (V), and at least one donor selected from diether compounds represented by formula (VI) and succinate compounds represented by formula (VII): wherein R 1 and R 2 , which may be the same or different, are each a linear, branched or cyclic C 1-20 alkyl, alkenyl, aryl, arylalkyl or alkylaryl group; and respectively; R 3 , R 4 , R 5 , R 6 , R 7 and R 8 , which may be the same or different, are each a hydrogen or a linear, branched or cyclic C 1-20 alkyl, alkenyl, aryl, arylalkyl or alkylaryl group.