Preparation of Soluble TiCl3 Catalysts and Their Use for Copolymerization of Ethylene with Propylene

1 March 1991

journal article
Published by Rubber Division, ACS in Rubber Chemistry and Technology

Vol. 64 (1) , 1-7
https://doi.org/10.5254/1.3538538

Abstract

The solubilization of TiCl3 catalysts in organic solvents was carried out to enhance the activity for random copolymerization of ethylene with propylene. β-TiCl3 · 1/3AlCl3 was solubilized in halogenated hydrocarbon solvents by using an appropriate ether as donor. α-TiCl3 free from AlCl3 was found to be soluble in the presence of a VCl4 or VOCl3 ligand and a suitable ether. The solubilized TiCl3 catalysts showed high catalytic activities for the copolymerization using trialkylaluminum compounds as a cocatalyst. The copolymers obtained possessed low crystallinities. Also, the copolymers seem to contain a microblock type of sequences and outstandingly high tensile strength and elongation at break compared to copolymers by conventional VCl4 and VOCl3 catalysts.

Keywords

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