公开(公告)号：US20180319964A1

公开(公告)日：2018-11-08

申请号：US15775641

申请日：2016-12-20

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Stefan B. OHLSSON ,  Wen LI ,  Etienne R.H. LERNOUX ,  Jianya CHENG ,  Xiao-Chuan WANG

IPC: C08L23/08 ,  C08J5/18 ,  B29C47/00 ,  B29C47/06 ,  B32B27/08 ,  B32B27/32

CPC classification number: C08L23/0815 ,  B29C47/0004 ,  B29C47/0021 ,  B29C47/0026 ,  B29C47/0057 ,  B29C47/065 ,  B29C47/92 ,  B29C2947/92704 ,  B29C2947/92904 ,  B29K2023/06 ,  B29K2023/0633 ,  B29K2105/0094 ,  B29K2105/02 ,  B29K2995/0063 ,  B32B7/04 ,  B32B27/08 ,  B32B27/18 ,  B32B27/32 ,  B32B27/327 ,  B32B2250/02 ,  B32B2250/03 ,  B32B2250/04 ,  B32B2250/05 ,  B32B2250/242 ,  B32B2270/00 ,  B32B2307/40 ,  B32B2307/50 ,  B32B2307/516 ,  B32B2307/518 ,  B32B2307/558 ,  B32B2307/704 ,  B32B2307/72 ,  B32B2307/732 ,  B32B2307/736 ,  B32B2553/00 ,  C08J5/18 ,  C08J2323/08 ,  C08J2423/06 ,  C08L2203/16 ,  C08L2205/025 ,  C08L2207/066 ,  C08L23/04 ,  C08L23/10

Abstract: Shrink films made from metallocene-catalyzed polyethylene polymers and processes for making the same are disclosed.

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.