公开(公告)号：BR7904284A

公开(公告)日：1980-03-25

申请号：BR7904284

申请日：1979-07-06

Applicant: HOECHST AG

Inventor： LUTZ P ,  RUSI K ,  BRINKMANN L

IPC: C08F4/00 ,  C08F4/02 ,  C08F4/60 ,  C08F4/64 ,  C08F10/00 ,  C08F297/08

Abstract: A catalyst system of such high efficiency that the purification of the polymer can be dispensed with is obtained by first reacting a magnesium halide with an electron donor and/or a cyclopolyene, bringing the product obtained into contact with a TiCl3-containing compound and using a stereoregulator. The system has a high stereospecificity whereby the proportion of atactic polymer is kept low. No excess amount of transition metal halides is required and the polymer obtained has uniform coarse particles and a very low halogen content.