Magnesium chloride particles having a polyhedral shape, catalytic composition supported on these particles, process for the preparation of these products and polyolefines obtained using these catalytic compositions.

摘要

Porous MgCl2 particles which, under the microscope, take the form of substantially regular six- or eight-faced polyhedra.
These particles, impregnated with transition metal compound, are used as a catalyst component in olefin polymerisation.