| abstract |
A PROCESS IS DESCRIBED FOR PREPARING AN AMORPHOUS ETHYLENE-PROPYLENE COPOLYMER OPTIONALLY CONTAINING A DIENESUCH AS 1,4-HEXADIENE, 1,5-CYCLOOCTADIENE, DUCYCLOPENTADIENE, AND THE LIKE. THE OLEFINS ARE POLYMERIZED IN THE PRESENCE OF A CATALYST FORMED BY MIXING A VANADIUM COMPOUND SUCH AS A VANADIUM HALIDE, OXYHALIDE, OR ALKOXIDE WITH AN ORGANO-ALUMINUM COMPOUND SUCH AS A TRIALKYL ALUMINUMM, ALKYL ALUMINUM HYDRIDE, OR ALKYL ALUMINUM HALIDE. A LOW ASH PRODUCT IS RECOVERED BY WASHING THE RESULTANT COPOLYMER SOLUTION WITH AQUEOUS CAUSTIC, SEPARATING THE SPENT AQUEOUS CAUSTIC SOLUTION, PASSING THE FILTERED COPOLYMER SOLUTION THROUGH A FILTER AND REMOVING THE AQUEOUS PHASE WHICH SEPARATES FROM THE FILTERED PRODUCT. |