Patent ID: 8648001

Claim:
A catalyst for polymerization of olefins formed from (A) a solid catalyst component comprising magnesium, titanium, halogen, and an electron donor compound; (B) an organoaluminum compound represented by the following formula (3): R 6 p AlQ 3-p (3) wherein R 6 represents an alkyl group having 1 to 4 carbon atoms, Q represents a hydrogen atom or a halogen atom, and p represents a real number satisfying the formula 0<p≦3; and (C) an aminosilane compound represented by formula (2): R 3 n Si(NR 4 R 5 ) 4-n (2) wherein R 3 represents a linear or branched alkyl group having 1 to 20 carbon atoms, a cycloalkyl group or a derivative thereof, two or more R 3 's which may be present being either the same or different; R 4 represents a hydrogen atom, a linear or branched alkyl group having 1 to 20 carbon atoms, a cycloalkyl group or a derivative thereof, a vinyl group, an aryl group, or an aralkyl group, two or more R 4 's which may be present being either the same or different; R 5 represents a linear or branched alkyl group having 1 to 20 carbon atoms, a cycloalkyl group or a derivative thereof, a vinyl group, an aryl group, or an aralkyl group, two or more R 5 's which may be present being either the same or different; R 4 and R 5 may bond to form a ring; n is an integer from 1 to 3; at least one of the NR 4 R 5 groups is a secondary amino group; and at least one of the R 3 groups is a cycloalkyl group or a derivative thereof.