公开(公告)号：CA2163465A1

公开(公告)日：1996-05-24

申请号：CA2163465

申请日：1995-11-22

Applicant: UNION CARBIDE CHEM PLASTIC

Inventor： RAMAMURTHY ARKALGUD VENKATAPAT ,  WAGNER BURKHARD ERIC ,  SCAROLA LEONARD SEBASTIAN

IPC: C08F2/00 ,  C08F2/34 ,  C08F8/00 ,  C08F10/02 ,  C08F210/16 ,  C08F297/08 ,  C08L23/00 ,  C08L23/04

Abstract: 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.