Patent ID: 8541333

Claim:
A catalyst component for olefin polymerization, comprising magnesium, titanium, at least one halogen, and at least one internal electron donor, wherein the at least one internal electron donor in the catalyst component is chosen from an α-cyanosuccinate compound of formula (I): wherein R 1 and R 2 , which may be the same or different, are each chosen from hydrogen, C 1 -C 14 linear alkyl, C 3 -C 14 branched alkyl, C 3 -C 10 cycloalkyl, C 6 -C 10 aryl, C 7 -C 10 alkaryl, and C 7 -C 10 aralkyl groups; and R 3 and R 4 , which may be the same or different, are each chosen from C 1 -C 10 linear alkyl, C 3 -C 10 branched alkyl, C 3 -C 10 cycloalkyl, C 6 -C 20 aryl, C 7 -C 20 alkaryl, and C 7 -C 20 aralkyl groups, and a combination of at least one α-cyanosuccinate compound of formula (I) and at least one monofunctional or difunctional compound E chosen from esters other than the α-cyanosuccinate compound of formula (I), ethers, ketones, ketals, amines, and silanes.