Prevailingly to substantially atactic crude polymers and methods for producing the same

Claim 1

A PROCESS FOR POLYMERIZING ALPHA-OLEFINS SELECTED FROM THE GROUP CONSISTING OF PROPYLENE, BUTENE-1 AND STYRENE DIRECTLY TO A CRUDE POLYMERIZATE MADE UP FOR MORE THAN 50% OF LINEAR, REGULARLY HEAD-TO-TAIL ATACTIC MACROMOLECULES, WHICH PROCESS COMPRISES CONTACTING THE ALPHAOLEFIN, IN AN INERT HYDROCARBON SOLVENT AND AT A TEMPERATURE OF FROM ABUT 60*C. TO ABOUT 100*C. WITH A CATALYST CONSISTING ESSENTIALLY OF THE HYDROCARBON-SOLUBLE PORTION OF THE CATALYTIC PROCUCT PREPARED BY (1) STARTING WITH A COMPOUND OF A TANSITION METAL SELECTED FROM THE GROUP CONSISTING OF THE HYDROCARBON-SOLUBLE HALIDES, OXYHALIDES AND ALKOXYHALIDES OF TITANIUM, VANADIUM, ZIRCONIUM, CHROMIUM AND MOLYBDENUM, AND (2) MIXING SAID HYDROCARBON-SOLUBLE COMPOOUND WITH AN ALUMINUM COMPOUND IN WHICH AT LEAST ALL BUT ONE OF THE VALENCES OF THE METAL ARE SATISFIED BY ALKYL RADICALS CONTAINING MORE THAN FOUR AND UP TO 16 CARBON ATOMS, AND THE REMAINING VALENCE, IF ANY, IS SATISFIED BY A MEMBER SELECTED FROM THE GROUP CONSISTING OF SAID ALKYL RADICALS AND ALKOXY RADICALS.