公开(公告)号：US20210054178A1

公开(公告)日：2021-02-25

申请号：US16543686

申请日：2019-08-19

申请人： Chevron Phillips Chemical Company LP

发明人： Chung Ching Tso ,  Errun Ding ,  Randall S. Muninger ,  John T. Blagg ,  Yongwoo Inn ,  Max P. McDaniel ,  Ashish M. Sukhadia ,  Sarah Eppinger

IPC分类号： C08L23/06 ,  C08F210/16 ,  C08F4/6592

摘要： Ethylene polymers having a density from 0.908 to 0.925 g/cm3, a melt index from 0.5 to 3 g/10 min, a ratio of Mw/Mn from 2 to 4, a ratio of Mz/Mw from 1.6 to 2.3, a CY-a parameter from 0.45 to 0.6, and an ATREF profile characterized by a single peak at a peak ATREF temperature from 76 to 88° C., and by less than 4.5 wt. % of the polymer eluting above a temperature of 91° C. These ethylene polymers can be used to produce various articles of manufacture, such as blown and cast films with a beneficial combination of high tear resistance and low haze.

公开(公告)号：US20210032449A1

公开(公告)日：2021-02-04

申请号：US16635239

申请日：2018-12-06

申请人： LG Chem, Ltd.

发明人： Jongsang Park ,  Ki Soo Lee ,  Eun Kyoung Song ,  Daesik Hong ,  Ye Jin Lee ,  Joongsoo Kim ,  Eunyoung Shin ,  Youngsuk You ,  Jinyoung Kwak

IPC分类号： C08L23/08 ,  C08F210/02 ,  C08F210/04 ,  C08F210/14 ,  C08F210/16 ,  C08F4/649 ,  C08F4/6592

摘要： The present invention relates to a polyethylene copolymer which has excellent processability and long-term durability, and thus is useful for hollow molding of a pipe or the like.

公开(公告)号：US20210024729A1

公开(公告)日：2021-01-28

申请号：US16975480

申请日：2019-05-03

申请人： LG CHEM, LTD.

发明人： Jung Ho JUN ,  Seung Hwan JUNG ,  Jin Sam GONG ,  Rae Keun GWAK ,  Choong Hoon LEE ,  Eun Jung LEE ,  Hyun Jin JU ,  In Sung PARK ,  Sang Eun PARK

IPC分类号： C08L23/08 ,  C08F210/02 ,  C08F210/08 ,  C08F210/16 ,  C08F2/38 ,  C08F4/649 ,  C08F4/6592

摘要： The present invention provides an ethylene/alpha-olefin copolymer having narrow molecular weight distribution together with a low density and an ultra low molecular weight, minimized number of unsaturated functional groups, and particularly a small amount of vinylidene among the unsaturated functional groups to show excellent physical properties, and a method for preparing the same.

公开(公告)号：US20210024728A1

公开(公告)日：2021-01-28

申请号：US16522788

申请日：2019-07-26

申请人： Chevron Phillips Chemical Company LP

发明人： Carlos A. Cruz ,  Yongwoo Inn ,  Justin Lumbley ,  Brandy Rutledge-Ryal ,  John R. Rathman ,  Jennifer L. Hicks ,  Jay M. Chaffin

IPC分类号： C08L23/08 ,  C08F210/16 ,  C08F4/6592 ,  C08K3/08

摘要： Ethylene-based polymers having a density of 0.952 to 0.965 g/cm3, a high load melt index (HLMI) from 5 to 25 g/10 min, a weight-average molecular weight from 275,000 to 450,000 g/mol, a number-average molecular weight from 15,000 to 40,000 g/mol, a viscosity at HLMI from 1400 to 4000 Pa-sec, and a tangent delta at 0.1 sec−1 from 0.65 to 0.98 degrees. These polymers have the processability of chromium-based resins, but with improved stress crack resistance, and can be used in large-part blow molding applications.

公开(公告)号：US10899855B2

公开(公告)日：2021-01-26

申请号：US16166224

申请日：2018-10-22

申请人： Chevron Phillips Chemical Company LP

发明人： Ashish M. Sukhadia ,  Max P. McDaniel ,  Errun Ding ,  Guylaine St. Jean ,  Qing Yang ,  Daniel G. Hert ,  Chung Ching Tso

IPC分类号： C08L23/08 ,  C08F210/16 ,  C08F4/6592 ,  C08F10/02 ,  C08J5/18 ,  C08F210/02 ,  C08F4/659 ,  C08F210/08 ,  C08F210/14

摘要： Disclosed herein are ethylene-based polymers produced using dual metallocene catalyst systems. These polymers have low densities, high molecular weights, and broad molecular weight distributions, as well as having the majority of the long chain branches in the lower molecular weight component of the polymer, and the majority of the short chain branches in the higher molecular weight component of the polymer. Films produced from these polymers have improved impact and puncture resistance.

公开(公告)号：US10894850B2

公开(公告)日：2021-01-19

申请号：US16312474

申请日：2017-07-03

申请人： BASELL POLIOLEFINE ITALIA S.R.L.

发明人： Roberta Marchini ,  Stefano Spataro ,  Emanuele Burgin ,  Roberta Pica

IPC分类号： C08F210/08 ,  C08F2/00 ,  C08F4/6592 ,  C08F10/08 ,  C08L23/20 ,  C09J123/20 ,  C08F2/38 ,  C08F4/659 ,  C08F210/16

摘要： A butene-1 polymer composition having MFR values of from 400 to 2000 g/10 min, measured according to ISO 1133 at 190° C. with a load of 2.16 kg, made from or containing A) a butene-1 homopolymer or a copolymer of butene-1 with a comonomer selected from the group consisting of ethylene and higher alpha-olefins, having a copolymerized comonomer content of up to 5% by mole; B) a copolymer of butene-1 with a comonomer selected from the group consisting of ethylene and higher alpha-olefins, having a copolymerized comonomer content of from 6% to 20% by mole; wherein the composition having a total copolymerized comonomer content from 4% to 15% by mole, referred to the sum of A) and B), and a content of fraction soluble in xylene at 0° C. of 60% by weight or less, determined on the total weight of A) and B).

公开(公告)号：US10894843B2

公开(公告)日：2021-01-19

申请号：US16478692

申请日：2018-11-29

申请人： LG Chem, Ltd.

发明人： Seul Ki Im ,  Seungmi Lee ,  Ohjoo Kwon ,  Eunji Shin ,  Ki Soo Lee ,  Daesik Hong ,  Sung Ho Park ,  Youngsuk You ,  Jinyoung Lee

IPC分类号： C08F110/02 ,  C08F10/02 ,  C08F210/16 ,  C08F10/04 ,  C08F4/646 ,  C08F4/659 ,  C08F4/6592 ,  C08F10/14 ,  C08J5/18

摘要： An olefin polymer capable of simultaneously satisfying excellent drop impact strength and transparency, a preparation method of the same, and a film using the same, can be provided. In an embodiment, an olefin polymer comprises a plurality of polymer chains, and satisfies the following conditions: i) each polymer chain of the plurality having an average number of short chain branches (SCBs) per 1000 carbon atoms of 20/1000C or more, wherein an SCB has C2 to C7 carbon atoms, ii) a molded film of the olefin polymer having a drop impact strength of 1500 g to 2400 g as measured in accordance with ASTM D1709A, wherein the molded film having a thickness of 100 μm, and iii) a molded film of the olefin polymer having a haze is 10% to 30% as measured in accordance with ASTM D1003, wherein the molded film having a thickness of 0.05 mm.

公开(公告)号：US10889663B2

公开(公告)日：2021-01-12

申请号：US16192493

申请日：2018-11-15

申请人： ExxonMobil Chemical Patents Inc.

发明人： Jian Yang ,  John R. Hagadorn ,  Gregory J. Karahalis ,  Timothy M. Boller ,  Evan J. Morris ,  Yan Jiang ,  Patrick Brant

IPC分类号： C07F17/00 ,  C08F4/6592 ,  C08F210/16 ,  C08F4/649 ,  C08F210/02 ,  C08F210/14 ,  C08F4/659 ,  C08J5/18 ,  C08F2/34

摘要： The present disclosure relates to asymmetric ansa-metallocene catalyst compounds that include at least one indenyl ligand substituted at the 3-position with a C3-C40 α-branched alkyl, such as 1-methylethyl, 1-methylpropyl, 1-methylbutyl, 1-ethylbutyl, 1,3-dimethylbutyl, 1-methyl-1-ethylbutyl, 1,1-diethylbutyl, 1-propylpentyl, and the like. Catalyst systems prepared with the catalyst compounds, polymerization methods using such catalyst systems, and polyolefins made using the polymerization methods are also described.

公开(公告)号：US10858465B2

公开(公告)日：2020-12-08

申请号：US16323991

申请日：2017-10-25

申请人： LG CHEM, LTD.

发明人： Jeong Kyu Lee ,  Pum Suk Park ,  In Young Song ,  Sung Joon Oh ,  Yi Young Choi ,  Soon Ho Sun

IPC分类号： C08F210/16 ,  C08F4/6592 ,  C08F4/659

摘要： The present invention relates to an ethylene/alpha-olefin copolymer and, more particularly, to an ethylene/alpha-olefin copolymer that exhibits excellent environmental stress crack resistance by appropriately controlling the ratio of crystal structure domain and amorphous domain, and the like. The ethylene/alpha-olefin copolymer comprises an ethylene repeating unit and an alpha-olefin repeating unit, and has a crystal structure including a crystalline domain containing lamellar crystals and an amorphous domain containing a tie molecule that mediates bonding between the lamellar crystals. The lamellar crystal thickness (dc) of the ethylene/alpha-olefin copolymer as calculated from the result of Small Angle X-ray Scattering (SAXS) analysis is between 12.0 and 16.0 nm, the amorphous domain thickness (da) is between 4.0 and 5.3 nm, and the thickness ratio da/dc is between 0.3 and 0.4.

公开(公告)号：US10829569B2

公开(公告)日：2020-11-10

申请号：US15744513

申请日：2016-08-10

申请人： ExxonMobil Chemical Patents Inc.

发明人： John R. Hagadorn ,  Jo Ann M. Canich ,  Matthew W. Holtcamp ,  Patrick J. Palafox ,  Ramyaa Mathialagan

IPC分类号： C08F4/76 ,  C08F4/64 ,  C08F4/6592 ,  C08F10/02 ,  C08F8/30 ,  C08F8/42 ,  C08F4/659 ,  C08F110/02

摘要： Catalyst systems with single site transition metal complexes (such as pyridyldiamido transition metal complexes), an activator, and a metal hydrocarbenyl chain transfer agent (preferably an aluminum vinyl-transfer agent) are disclosed for use in alkene polymerization.