Process for producing α-olefin polymers

Claim 1

A process for producing alpha-olefin polymers which comprises: (a) reacting one mol of an organoaluminum compound (A 1 ) with 0.1 to 8 mols of an electron donor (B 1 ) in a solvent at a temperature of -20° C. to 200° C., to obtain a reaction product (I); (b) reacting this reaction product (I) with TiCl 4 at a temperature of 0° to 200° C. in a ratio of the number of Al atoms to that of Ti atoms of 0.05 to 10, to form a solid product (II); (c) reacting 100 g of this solid product (II) with 10 to 1,000 g of an electron donor (B 2 ) and 10 to 1,000 g of an electron acceptor at a temperature of 40° to 200° C. to obtain a solid product (III); (d) during or/and after the reaction step (b) or/and during or/and after the reaction step (c), subjecting the solid product (II) or (III) to a polymerization treatment of contacting the product (II) or (III) with 10 to 5,000 g of an alpha-olefin based on 100 g of the solid product (II) or (III), under the atmospheric pressure, or adding said alpha-olefin to the solid product (II) or (III) so as to give a pressure of 10 kg/cm 2 G or lower, and at a reaction temperature of 30° to 90° C., to obtain a final solid product; (e) containing 1 g of said final solid product from step (d) with 0.1 to 500 g of an organoaluminum compound (A 2 ); (f) adding to combination of the step (e), 0.05 to 10 g of a reaction product (G) obtained by reacting 1 mol of an organoaluminum compound (A 3 ) with 0.01 to 5 mols of an electron donor (B 3 ), such reaction being carried out at a temperature of -30° to 100° C., (g) subjecting the product resulting from step (e) or the product resulting from step (f) to a preactivation treatment with 0.01 to 5000 g of an olefin to thereby obtain a preacticated catalyst, and (h) polymerizing an alpha-olefin or alpha-olefins with the preactivated catalyst resulting from step (g).