Polymerization process and catalyst

Claim 1

A PROCESS FOR OBTAINING A POLYMER OF BUTADIENE HAVING AT LEAST 80 PERCENT CIS-1,4-ADDITION WHICH COMPRISES POLYMERIZING BUTADIENE IN THE PRESENCE OF A CATALYST FORMED BY INTERMIXING COMPONENTS CONSISTING OF A COMPOUND HAVING THE FORMULA R2ALCL, A TITANIUM HALIDE SELECTED FROM THE GROUP CONSISTING OF TITANIUM TETRAIODIDE AND MIXTURES THEREOF WITH TITANIUM TETRACHLORIDE, AND AT LEAST ONE AMINE HAVING THE FORMULA R2N AND FROM 1 TO 25 CARBON ATOMS PER MOLECULE, R BEING SELECTED FROM THE GROUP CONSISTING OF ALKYL, CYCLOALKYL AND ARYL RADICALS HAVING FROM 1 TO 20 CARBON ATOMS EACH, AND EACH R'' BEING SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL, CYCLOALKYL AND ARYL RADICALS, INCLUDING HYDROCARBON RADICALS TWO OF WHICH JOIN TO FORM A HETEROCYCLIC NITROGEN RING WITH SAID N, WHEREIN THE POLYMERIZATION TEMPERATURE IS WITHIN THE RANGE 30 TO 100*F., THE REACTION IS CONDUCTED IN A HYDROCARBON DILUENT MEDIUM WHICH IS CHEMICALLY INERT UNDER THE REACTION CONDITIONS, THE RATIO OF ALUMINUM COMPOUND TO TOTAL TITANIUM IS IN THE RANGE 4:1 TO 15:1, AND THE MOL RATIO OF SAID AMINE TO TITANIUM IS IN THE RATIO 1.5:1 TO 4:1.