| abstract |
The invention contains magnesium, titanium and halogens and Wherein R 1 is independently at each occurrence an aliphatic or aromatic hydrocarbon or a substituted hydrocarbon group containing 1 to 20 carbon atoms; x is 2 to 4; R 2 is an aliphatic or aromatic hydrocarbon or 1 to 20 A substituted hydrocarbon group containing 3 carbon atoms, provided that 3 to 4 atoms in the shortest chain linking the first R 1 -OC (O) -O- group and the second R 1 -OC (O) -O- group Present), a solid hydrocarbon-insoluble catalyst component useful for olefin polymerization, further comprising an internal electron donor. |