Patent ID: 6194526
Filing Date: 2001-02-27
Classification: C08F,Y10S

Abstract:
A process to produce a polymer said process comprising polymerizing monomers to produce said polymerwherein said monomers comprise ethylene, 1-butene, and 1-hexene;wherein the total amount of 1-butene and 1-hexene in said polymer is less than 10 mole percent of said polymer;wherein the mole ratio of 1-butene to 1-hexene in said polymer is in a range of 4:1 to 9:1;wherein said polymerizing is conducted,(1) in a loop reactor,(2) under slurry polymerization conditions,(3) with a diluent that comprises isobutane, where said isobutane is a majority of said diluent by weight(4) with a catalyst that comprises titanium, magnesium, and halide(5) with a cocatalyst that comprises organoaluminum;(6) at a temperature from 73.degree. C. to 85.degree. C., andwherein said polymer has(7) a heterogeneity index (Mw/Mn) from about 3 to about 7,(8) a density from about 0.915 to about 0.925 grams per cubic centimeter,(9) a melt index from about 0.25 to about 3.5 grams per ten minutes,(10) a shear ratio from about 24 to about 30.