Process for preparing halogencontaining polyolefins

Claim 1

AN IMPROVED PROCESS FOR THE PREPARATION OF A HALOGENATED POLYOLEFIN WHICH COMPRISE CONTACTING AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF ETHYLENE AND PROPYLENE WITH A CATALYST AMOUNT OF A CATALYST MIXTURE OF A TITANIUM SALT AND AN ALUMINIUM ALKYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALUMINIUM TRIALKYL ALUMINUM ALKYL SESQUIHALIDE, DISPERSED IN A HALOGEN-INERT HALOGENATED ALIPHATIC LIQUID, TO PRODUCE A REACTION MIXTURE CONTAINING A POLYMER OF SAID OLEFIN, CONTACTING SAID REACTION MIXTURE WITH A HALOGENATING AGENT SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE, AND A MIXTURE OF CHLORINE AND SO2 AT A TEMPERATURE OF FROM ABOUT 40150* C, AND A PRESSURE OF UP TP ABOUT 30 ATMOSPHERES, WHEREBY THE AFORESAID CATALYST COMPONENTS ARE CONVERTED INTO HALOGEN TRANSFER AGENTS, AND RECOVERING A HALOGENATED POLYOLEFIN, THUS EMPLOYING THE SAME HALOGEN-INERT DISPERSING MEDIUM FOR BOTH THE POLYMERIZATION AND THE SUBSEQUENT HALOGENATION.