| 摘要 |
Olefin(s) are (co)polymerized in the presence of a catalyst made by reacting a suspension of a Group II divalent metal hydroxycloride with a halide, halo-alkoxide or alkoxide of a transition metal of Group IVa, Va or VIa in liquid form maintained at 80-180 DEG C., and activating the reaction product with an organometallic compound of a Group I to IV metal. The catalysts are stated to be useful for polymerizing ethylene or copolymerizing ethylene and propylene. Examples describe the solution polymerization of ethylene at 90 DEG C. and 10 kgm./cm.2 in an autoclave.ALSO:Polymerisation catalysts are made by reacting a suspension of a Group II divalent metal hydroxychloride with a halide, halo-alkoxide or altoxide of a transition metal of Group IVa, Va or VIa in liquid form maintained at 80-180 DEG C. and activating the reaction product with an organometallic compound of a Group I to IV metal. The preferred hydroxychloride is Mg(OH)Cl, the preferred transition metal compounds are TiCl4, Ti(OEt)4, Ti(OEt)3Cl, VOCl3 and VCl4. Tialkyl aluminium compounds are mentioned as organometallic compounds, tri-isobutyl aluminium being used in comparative examples. |
