Patent ID: 6037433
Filing Date: 2000-03-14
Classification: C08F,Y10S

Abstract:
A homopolymer of ethylene made from a loop/slurry polymerization process comprising contacting in a reaction zone, at a temperature within a range of about 150.degree. F. to about 180.degree. F. in the presence of a hydrocarbon diluent having three or four carbon molecules per molecule, and in the absence of hydrogen:a) ethylene monomer;b) a catalyst system comprising a magnesium compound and a titanium halide, wherein both the magnesium compound and the titanium halide are supported on an inorganic oxide support and said catalyst system has a particle size within a range of about 1 to 40 micron; andc) an aluminum alkyl cocatalyst;and recovering a homopolymer of ethylene, wherein said homopolymer of ethylene has a weight average molecular weight greater than about one million, an inherent viscosity greater than about 19, a particle size less than about 400 microns, a density within a range of about 0.92 g/cc to abbout 0.94 g/cc, a high load melt index of 0 g/10 minutes, and a sand wheel abrasion loss of less than about 150 grams.