Patent ID: 6337377
Filing Date: 2002-01-08
Classification: C08F

Abstract:
A process for producing an olefin polymer which comprises homopolymerizing or copolymerizing an olefin by the use of an olefin polymerizing catalyst consisting of:(A) a solid catalyst component containing magnesium, titanium, halogen and electron donative compound as essential components, (B) an organoaluminum compound, and (C) at least two electron donative compounds including electron donative compound (&agr;) and electron donative compound (&bgr;), provided that the pentad stereoirregularity index (mmrr/mmmm) of 105Â° C. xylene-insoluble fraction of a homopolypropyelene obtained by carrying out polymerization by the use of electron donative compound (&agr;) together with the above-mentioned solid catalyst component (A) and organoaluminum compound (B) satisfies the following condition: 0&lE;mmrr/mmmm&lE;0.0068 and the pentad stereoirregularity index (mmrr/mmmm) of 105Â° C. xylene-insoluble fraction of a homopolypropylene obtained by carrying out polymerization by the use of electron donative compound (&bgr;) together with the above-mentioned solid catalyst component (A) and organoaluminum compound (B) satisfies the following condition:0.0068