Patent ID: 6319989
Filing Date: 2001-11-20
Classification: B01J,C08F,C08J,C08L

Abstract:
A process for making an ethylene polymer composition,the process having at least two injection points and at least two polymerization reactors, each reactor having a reaction stream or zone wherein at least one catalyst system and make-up feed is injected and wherein the make-up feed comprises ethylene and optionally at least one unsaturated comonomer, and comprising continuously operating the at least two polymerization reactors and separately injecting the catalyst system and the make-up feed into the reaction stream or zone of at least one reactor,the composition comprising ethylene interpolymerized with at least one unsaturated comonomer and characterized as having:a) a melt flow ratio, I.sub.10 /I.sub.2, from 8 to 10.4,b) a M.sub.w /M.sub.n of greater than 4 as determined by gel permeation chromatography,c) a melt index, I.sub.2, from 0.1 to 10 gram/10 minutes,d) a composition density less than 0.945 gram/cubic centimeter, ande) based on the total weight of crystallizable polymer portions, a weight percent at the dominant peak temperature above 75.degree. C., as determined using crystallization analysis fractionation in the range of 20 to 100.degree. C., equal to or greater than the mathematical product of 1.7946.times.10.sup.-28.times.10.sup.(31.839.times.composition density) for composition density in grams/cubic centimeter.