Modified catalyst for propylene polymerization on the basis of tetrachlorotitanium and sesquichloroaluminium
In the reaction of tetrachlorotitanium reduction with sesquichloroaluminium in the presence of di-n-butyl ether and ethyl benzoate, used as modifiers of the electron-donor type, titanium compounds have been obtained with characteristic X-ray diffraction and IR-spectra. The activity of these compounds in the polymerization of propylene, with ET2AlCl used as cocatalyst, has been checked. Their maximum activity was 900 g PP/g Ti. The apparent density of polypropylene was about 300 g/l and its content of ieotactic fraction was 94—96%.
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