abstract |
(a) a solid catalyst component comprising an olefin polymer and an electron donor selected from Mg, Ti, halogen, 1.3-diethers in specific amounts; (b) an aluminum alkyl compound and (c) an external electron donor compound (ED) selected from a specific class; Wherein the components (b) and (c) are used in an amount such that the molar ratio Al / (ED) is in the range of from 2 to 200, the homopolymerization or copolymerization of propylene and other olefins For the weather. The process can provide a polypropylene product that has good morphological properties, high stereoregularity, and can exhibit self-extinguishing properties such that the adverse effects caused by micro catalyst particle polymerization can be selectively solved or mitigated. |