Patent ID: 6271329
Filing Date: 2001-08-07
Classification: C08F,Y10S

Abstract:
An ethylene copolymer, composed of units of ethylene and at least one C.sub.3 -C.sub.12 .alpha.-olefin, having a heptane-extractable content of less than 0.1 wt %, based on the total weight of the copolymer, a molecular weight distribution M.sub.w /M.sub.n exceeding 3 and a distribution of comonomers which is characterized by a standard deviation .sigma. of the average-weighted elution temperature T.sub.a, determined by the method of the Temperature Rising Elution Fraction (TREF), which conforms to the following equation GI: ##EQU3##where k.sub.0 is 338.5.degree. C., k.sub.1 is 0.053, k.sub.2 is 1.1318.degree. C., k.sub.3 is 0.00483.degree. C..sup.-1, k.sub.4 is 0.55.degree. C., and T.sub.a is <98.degree. C.