公开(公告)号：US20230022149A1

公开(公告)日：2023-01-26

申请号：US17757000

申请日：2020-11-18

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Matthew W. HOLTCAMP ,  Dongming LI ,  Kevin A. STEVENS ,  Laughlin G. MCCULLOUGH

IPC: C08F210/16 ,  C08J5/18

Abstract: A polyethylene suitable for use in blown film can comprise ethylene derived units and C3 to C12 α-olefin derived units at 0.5 wt % to 10 wt % of the polyethylene and have a reversed-co-monomer index (RCI,m) of 35 to 100, a comonomer distribution ratio (CDR-2,m) of 1.20 to 1.80, and a weight average molecular weight (Mw) to number average molecular weight (Mn) of 5 to 7.

公开(公告)号：US20230322972A1

公开(公告)日：2023-10-12

申请号：US18043088

申请日：2021-09-29

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Matthew W. HOLTCAMP ,  Laughlin G. MCCULLOUGH ,  Kevin A. STEVENS ,  Dongming LI ,  Robert L. HALBACH ,  Ramyaa MATHIALAGAN ,  Charles J. HARLAN ,  Timothy M. BOLLER

IPC: C08F4/76 ,  C08F4/02 ,  C08F4/80 ,  C08F210/16 ,  C08F2/34

CPC classification number: C08F4/76 ,  C08F4/025 ,  C08F4/80 ,  C08F210/16 ,  C08F2/34 ,  C08F2410/06 ,  C08F2420/08

Abstract: This invention relates to a supported catalyst system comprising: (i) at least one first catalyst component comprising a group 4 metallocycle containing metallocene complex; (ii) at least one second catalyst component comprising a 2,6-bis(imino)pyridyl iron complex; (iii) activator; and (iv) support. The catalyst system may be used for preparing polyolefins, such a bimodal polyethylene, typically in a gas phase polymerization.

公开(公告)号：US20230021760A1

公开(公告)日：2023-01-26

申请号：US17756934

申请日：2020-12-09

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Nino RUOCCO ,  Matthew W. HOLTCAMP ,  Kevin A. STEVENS ,  Tamara BLANTON ,  Summer J. BERNHARDT

IPC: C08F210/16 ,  C08J5/18

Abstract: This invention relates to a biaxially-oriented polyethylene film comprising polyethylene having: (A) a melt index, I2, of 1.0 g/10 min or greater; (B) a density of 0.925 g/cm3 to 0.945 g/cm3; (C) a g′vis of less than 0.8; (D) an Mz of 1,000,000 g/mol or more; (E) an Mw/Mn of 5 or more; (F) an Mw of 100,000 g/mol or more; (G) a ratio of the g′LCB to the g′Zave is greater than 1.0; and (H) a Strain Hardening Ratio of 4 or more, where the film has a 1% secant in the transverse direction of 60,000 psi or more, a Dart Drop of 250 g/mil or more, and a ratio of 1% secant MD/1% secant TD is 0.65 or more.

公开(公告)号：US20230399426A1

公开(公告)日：2023-12-14

申请号：US18250259

申请日：2021-11-22

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Wen LI ,  Haiqing PENG ,  Michael A. LEAF ,  Kevin A. STEVENS

IPC: C08F210/16 ,  C08F4/76 ,  C08F4/02

CPC classification number: C08F210/16 ,  C08F4/76 ,  C08F4/02 ,  C08F2800/20 ,  C08F2420/10

Abstract: Provided herein are metallocene-catalyzed polyethylene compositions that exhibit a high degree of broad orthogonal composition distribution (“BOCD”), meaning that they have a relatively high degree of short-chain branching in higher-molecular-weight chains, as compared to the short-chain branching in lower-molecular weight chains. The compositions may have 80 to 99.9 wt % units derived from ethylene and 0.1 to 20 wt % units derived from a C3 to C40 α-olefin comonomer; density from 0.925 to 0.950 g/cm3, melt index (I2.16) within the range from 0.1 to 5 g/10 min, and molecular weight distribution (Mw/Mn) within the range from 4.0 to 8.0. The polyethylene compositions may be formed any suitable polymerization method, although methods according to some embodiments may include utilizing a pre-trim catalyst slurry that is optionally combined with trim catalyst solution to achieve on-the-fly adjustment of catalyst ratios for producing these polyethylene compositions among other polyethylene compositions in a production campaign.