COARSE GRAINED POLYOLEFIN, PRODUCTION THEREOF AND A PROCATALYST CONTAINING A TRANSESTERIFICATION PRODUCT BETWEEN A LOWER ALCOHOL AND DIOCTYLPHTHALATE USED THEREFORE

摘要

The invention relates to a method for preparing polyolefins. In the polymerization, a procatalyst composition is being used, which has been prepared by contacting MgCI2, a lower alcohol, a titani um compound and a phthalic acid ester. The po- lyolefin is given the adequate coarseness by using a pracatalyst of the said type, which has been prepared by carrying out a transesterification between the lower alcohol and the phthalic acid ester an d by selecting dioctyl phthalate (DOP) as phthal- ic acid ester.