Terpolymers and processes for producing them

Claim 1

A PROCESS FOR COPOLYMERIZING ETHYLENE, AND ACETYLENIC HYDROCARBON HAVING THE FORMULA CH$CR IN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND THE PHENYL RADICAL, AND A HIGHER ALPHA-OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND BUTENE- 1, TO OBTAIN TERPOLYMERS CONTAINING UNITS DERIVED FROM EACH OF THE THREE MONOMERS IN THE TERPOLYMER MOLECULE, AND WHICH TERPOLYMERS CONTAIN DOUBLE BONDS IN THE MAIN CHAIN AS SHOWN BY THE INFRARED SPECTRA, AND ARE VULCANIZABLE TO ELASTIC RUBBRS HAVING AN IMPACT RESILIENCE HIGHER THAN BUTYL RUBBER, WHICH PROCESS COMPRISES BRINGING A MIXTURE OF, BY VOLUME, FROM 5% TO 30% OF ETHYLENE, FROM 1% TO 10% OF THE ACETYLENIC HYDROCARBON, AND FROM 60% TO 90% OF THE HIGHER ALPHA-OLEFIN INTO INTIMATE CONTACT, AT A TEMPERATURE OF FROM 25*C. TO 35*C., UNDER A PRESSURE OF FROM NORMAL ATMOSPHERIC PRESSURE TO ABOUT 20 ATMOSPHERES, AND IN AN INERT HYDROCARBON SOLVENT, WITH A HYDROCARBONDISPERSIBLE CATALYST PREPARED BY MIXING (1) A COMPOUND OF A TRANSISTION METAL SELECTED FROM THE GROUP CONSISTING OF HYDROCARBON-SOLUBLE LIQUID HALIDES, OXYHALIDES AND ALKOXYHALIDES OF TETRAVALENT TITANIUM, TETRA- AND PENTAVALENT VANADIUM, AND HEXAVALENT CHROMIUM, WITH (2) ALUMINUMTRIHEXYL.