In situ polyethylene blend

Details In situ polyethylene blend In situ polyethylene blend

C - Chemistry, Metallurgy

08

F

C08F 2/34 (2006.01) C08F 10/02 (2006.01) C08F 297/08 (2006.01) C08L 23/04 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2163465

An in situ blend formed in the gas phase in two or more reactors connected in series comprising a mixture of two types of particles of polyethylene, (i) one type of particle containing a major proportion of high molecular weight polyethylene and a minor proportion of low molecular weight polyethylene and having a relatively high split ratio and (ii) one type of particle containing a major proportion of low molecular weight polyethylene and a minor proportion of high molecular weight polyethylene and having a relatively low split ratio wherein the average particle size of the blend is at least about 300 microns; the average split ratio of the blend is in the range of about 40:60 to about 60:40; and no more than about 10 percent by weight of the particles in the blend have a split ratio below 90 percent of the average split ratio of the blend.

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