Process for the polymerization of mono-olefins

Claim 1

IN A PROCESS FOR THE PREPARATION OF A CRYSTALLINE POLYOLEFIN BY POLYMERIZAION OF AT LEAST ONE A-OLEFIN OF THE FORMULA CH2=CH-R, WHEREIN R REPRESENTS AN ALIPHTATIC RADICAL HAVING 1 TO 4 CARBON ATOMS, IN SUSPENSION, IN SOLUTION OR IN THE GAS PHASE, AT A TEMPERATURE OF FROM 20* TO 130*C. AND A PRESSURE OF FROM 1 TO 50 KG CM2, WHEREIN THE POLYMERIZATION IS CARRIED OUT WITH A MIXED CATALYST, THE IMPROVEMENT WHICH COMPRISES USING A MIXTED CATALYST PREPARED FROM A. A HALOGEN COMPOUND OF THE TRIVALENT TITANIUM B. A HALOGEN FREE, ORGANO-ALUMINUM COMPOUND C. A MONOCYCLOOLYALKENE HAVING 7 TO 8 RING MEMBERS AND RESPECTIVELY 2 TO 3 OR 2 TO 4 NON-CUMULATED DOUBLE BONDS IN THE RING OR THE ALKYL RADICAL OF THE SUBSTITUTED DERIVATIVES THEREOF, THE ALKYL RADICAL OF THE SUBSTITUENT CONTAINING FROM 1 TO 4 CARBON ATOMS AND B. A CYCLIC OR NON-CYCLIC COMPOUND WHICH CONTAINS AS THE ONYL FUNCTIONAL GROUPS OR A UREA GROUPING FULLY SUBSTITUTED AT AMIDE GROUPS OR A UREA GROUPING FULLY SUBSTITUTED AT THE NITROGEN ATOMS.