公开(公告)号：US20180134828A1

公开(公告)日：2018-05-17

申请号：US15564387

申请日：2016-04-19

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Antonios K. DOUFAS ,  David F. SANDERS ,  Matthew W. HOLTCAMP ,  Xuan YE ,  Alexander I. NORMAN ,  Rohan A. HULE ,  Hasnain RANGWALLA

IPC: C08F210/16 ,  C08F4/6592 ,  B01J31/22

CPC classification number: C08F210/16 ,  B01J31/2295 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/6592 ,  C08F4/65927 ,  C08F110/02 ,  C08F2420/02 ,  C08F2500/04 ,  C08F2800/10 ,  C08F4/65904 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/18 ,  C08F2500/13 ,  C08F2500/11 ,  C08F2500/17

Abstract: This invention relates to ethylene polymers obtained using a catalyst system comprising fluorided silica, alkylalumoxane activator and at least two metallocene catalyst compounds (a bridged monocyclopentadienyl group 4 transition metal compound and a biscyclopentadientyl group 4 transition metal compound), where the fluorided support has not been calcined at a temperature of 400° C. or more, and is preferably produced using a wet mixing method, such as an aqueous method. The ethylene polymers have: 1) at least 50 mol % ethylene; 2) a reversed comonomer index, mol %, (RCI,m) of 85 or more; 3) a Comonomer Distribution Ratio-2 (CDR-2,m) of the percent comonomer at the z average molecular weight divided by the percent comonomer at the weight average molecular weight plus the number average molecular weight divided by 2 ([% comonomer at Mz]/[% comonomer at ((Mw+Mn)/2)] as determined by GPC of 2.3 or more; and 4) a density of 0.91 g/cc or more.

公开(公告)号：US20220289883A1

公开(公告)日：2022-09-15

申请号：US17663991

申请日：2022-05-18

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Rohan A. HULE ,  Antonios K. DOUFAS ,  Derek W. THURMAN ,  Crisita Carmen H. ATIENZA ,  Matthew W. HOLTCAMP ,  David F. SANDERS ,  Matthew S. BEDOYA

IPC: C08F210/16

Abstract: This invention relates to a catalyst system including the reaction product of a support (such as a fluorided silica support that preferably has not been calcined at a temperature of 400° C. or more), an activator and at least two different transition metal catalyst compounds; methods of making such catalyst systems, polymerization processes using such catalyst systems and polymers made therefrom.