| abstract |
A solid, insoluble hydrocarbon catalyst component, useful for polymerizing olefins, said catalyst component contains magnesium, titanium, and halogen, and also contains an internal electron donor having a structure: [R1-OC (O) O-] xR2 where R1 is independently at each incidence, an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing 1 to 20 carbon atoms; x is 2-4; and R2 is an aliphatic or aromatic hydrocarbon, or substituted hydrocarbon group containing 1 to 20 carbon atoms, since there are 2 atoms in the shortest chain that connect to a first R1-OC (O) -O group and a second group R1-OC (O) -O. |