Titanium tri:chloride component prodn. for Ziegler-Natta catalyst - by treatment with carbon mon:oxide, giving satisfactory induction period

摘要

In the prodn. of a TiCl3 catalyst component for Ziegler-Natta-type polymerisation catalysts, an appropriate catalyst component consisting (mainly) of TiCl3 is exposed to a CO atmos. at 0.1-10 (esp. 0.5-1 bar) for 0.5-60 (esp. 5-15) min. at -20 to 100 (esp. 10 to 30) degrees C. These catalysts are used for the homo- and co-polymerisation of 2-6C mono-olefins. The catalyst not only yields polymers in high yields and with high crystallinity but also has the property of becoming active on mixing with the Al alkyl component only after a sufficiently long induction period, which is partic. important in continuous polymerisation. Esp. good results are obtd. in dry polymerisation, although it is also possible to work in liq. medium.