| abstract |
A solid catalyst component for the polymerization of olefins comprising magnesium, titanium, a halogen and an internal electron donor, wherein the internal electron donor is at least a compound of α-cyanosuccinate I having the formula (I): wherein R1 and R2 are independently hydrogen, a linear or branched C1-C14 alkyl, a C3-C10 cycloalkyl, C6-C10 unaryl, a C7-C10 alkaryl or a C7-C10 aralkyl; and R3 and R4 are independently a linear branched C1-C10 alkyl, a C3-C10 cycloalkyl, a C6-C20 aryl, a C7-C20 alkaryl or a C7-C20 aralkyl, alternatively, the internal electron donor is a combination of the minus a compound of α-cyanosuccinate I and a monofunctional or difunctional compound E chosen from esters other than the compound of α-cyanosuccinate I, ethers, ketones, ketals, amines and silanes. |