Aluminum alkyl-transition metal halide catalyst modified with an arsine or stibine compound

Claim 1

IN THE POLYMERIZATION OF A-OLEFINIC HYDROCARBON CONTAINING AT LEAST THREE CARBON ATOMS TO FORM SOLID CRYSTALLINE POLYMER, THE IMPROVEMENT WHICH COMPRISES CATALYZING THE POLYMERIZATION WITH A CATALYTIC MIXTURE CONSISTING ESSENTIALLY OF AN ALUMINUM COMPOUND HAVING THE FORMULA R3AL WHEREIN EACH R IS A HYDROCARBON RADICAL CONTAINING 1 TO 12 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL AND ARALKYL, A TRIHALIDE OF A TRANSITION METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND VANADIUM AND A THIRD COMPONENT SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE STRUCTURAL FORMULA R3Z WHEREIN Z IS A GROUP VA ELEMENT SELECTED FROM THE GROUP CONSISTING OF ARSENIC AND ANTIMONY AND EACH R IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, AND HYDROCARBON RADICALS CONTAINING 1 TO 12 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL AND ARALKYL SAID THIRD COMPONENT BEING PRESENT IN AN AMOUNT SUFFICIENT TO INCREASE THE CRYSTALLINITY AND INHERENT VISCOSITY OF SAID POLYMER.