PROCESS FOR POLYMERIZATION OF .ALPHA.-OLEFIN, A POLY-.ALPHA.-OLEFIN PREPARED THEREBY, AND AN AMINOSILANE COMPOUND USABLE AS THE CONSTITUENT OF CATALYST FOR THE PROCESS

摘要

A method for preparing .alpha.-olefin polymer or .alpha.-olefin copolymer having high stereoregularity and high melting point, while having broad molecular weight distribution, by polymerizing of an .alpha.-olefin, in the presence of a catalyst containing the constituents: (A) a solid catalyst constituent containing magnesium, titanium, a halogen element and an electron donor indispensably, (B) an organoaluminum compound, and (C) an aminosilane compound containing polycyclic amino group having more than 7 carbon atoms, propylene polymer prepared therefrom and a novel aminosilane compound usable as a component for the catalyst in said method represented by the following general formula (1) or (2): (see fig. I) or (see fig II) wherein R1, R2, and (see fig. III) have the same meanings as defined in the detailed description.