公开(公告)号：US20030065097A1

公开(公告)日：2003-04-03

申请号：US10100687

申请日：2002-03-15

Applicant: The Dow Chemical Company

Inventor： Alexander W. DeGroot ,  James C. Stevens ,  Sylvie Y. Desjardins ,  Jeffrey Weinhold ,  Edmund Carnahan ,  David Gillespie ,  Daniel D. VanderLende

IPC: C08F008/00

CPC classification number: C08F210/16 ,  C08F4/65908 ,  C08F4/65912 ,  C08F4/6592 ,  C08F4/65925 ,  C08F4/65927 ,  C08F10/00 ,  C08L23/04 ,  C08L23/06 ,  C08L23/0815 ,  C08L2205/02 ,  C08L2205/025 ,  C08L2207/07 ,  C08L2314/02 ,  C08L2314/06 ,  Y02P20/52 ,  Y10S526/943 ,  C08F2/001 ,  C08F4/65904 ,  C08F2/06 ,  C08L2666/04 ,  C08F210/14 ,  C08F2500/11 ,  C08F2500/12 ,  C08F2500/01 ,  C08F2500/03 ,  C08F2500/04 ,  C08F2500/02 ,  C08F2/00 ,  C08F2500/08 ,  C08F2500/05 ,  C08F2500/17 ,  C08F2500/26

Abstract: A polymer composition comprises: (a) a high molecular weight, branched component; and (b) a low molecular weight, branched component. Some polymer compositions are characterized by a substantial absent of amyl or methyl branches and a melt strength (MS) that satisfies the following relationship: 1 M null null null S null x I 2 + y where x is greater than or equal to about 12.5 and y is greater than or equal to about 3. Some polymers are characterized by a melt strength (MS) that satisfies the following relationship: 2 M null null null S null x I 2 + y where x is greater than or equal to about 3 and y is greater than or equal to about 4.5 and a molecular weight distribution of greater than 3. A process for making polymers is also disclosed.