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1.发明公开公开(公告)号：US20240301185A1
公开(公告)日：2024-09-12
申请号：US18663194
申请日：2024-05-14
发明人： Errun Ding , Chung Ching Tso , Max P. McDaniel , Ashish M. Sukhadia , Youlu Yu , Randall S. Muninger , Aaron M. Osborn , Christopher E. Wittner
IPC分类号： C08L23/08 , C08F4/6592 , C08F210/16
CPC分类号： C08L23/0815 , C08F4/65925 , C08F4/65927 , C08F210/16 , C08L2203/16 , C08L2207/066
摘要： Disclosed herein are ethylene-based polymers generally characterized by a melt index of less than 15 g/10 min, a density from 0.91 to 0.945 g/cm3, a CY-a parameter at 190° C. from 0.2 to 0.6, an average number of long chain branches per 1,000,000 total carbon atoms of the polymer in a molecular weight range of 500,000 to 2,000,000 g/mol of less than 5, and a maximum ratio of ηΕ/3η at an extensional rate of 0.03 sec−1 in a range from 3 to 15. The ethylene polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in the lower molecular weight fraction, such that polymer melt strength and bubble stability are maintained for the fabrication of blown films and other articles of manufacture. These ethylene polymers can be produced using a dual catalyst system containing a single atom bridged metallocene compound with an indenyl group and a cyclopentadienyl group, and an unbridged hafnium metallocene compound with two cyclopentadienyl groups.
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2.发明公开公开(公告)号：US20240076424A1
公开(公告)日：2024-03-07
申请号：US18496994
申请日：2023-10-30
发明人： Errun Ding , Qing Yang , Randall S. Muninger , Youlu Yu , Yongwoo Inn
IPC分类号： C08F10/02 , C08F2/34 , C08F4/6592
CPC分类号： C08F10/02 , C08F2/34 , C08F4/65922 , C08F2500/01 , C08F2500/04 , C08F2500/12 , C08F2500/17
摘要： Disclosed herein are ethylene-based polymers generally characterized by a melt index of less than 1 g/10 min, a density from 0.93 to 0.965 g/cm3, a CY-a parameter at 190° C. of less than 0.2, an average number of short chain branches per 1000 total carbon atoms of the polymer in a molecular weight range of 400,000 to 600,000 g/mol that is greater than that in a molecular weight range of 40,000 to 60,000 g/mol, and an average number of long chain branches per 1000 total carbon atoms of the polymer in a molecular weight range of 400,000 to 600,000 g/mol that is greater than that in a molecular weight range of 4,000,000 to 6,000,000 g/mol. The ethylene polymers can be used to fabricate pipes, blown films, and blow molded products, and the ethylene polymers can be produced with a dual catalyst system containing a single atom bridged or two carbon atom bridged metallocene compound with two indenyl groups or an indenyl group and a cyclopentadienyl group, and a single atom bridged metallocene compound with a fluorenyl group and a cyclopentadienyl group with an alkenyl substituent.
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3.发明公开公开(公告)号：US20230416419A1
公开(公告)日：2023-12-28
申请号：US18463380
申请日：2023-09-08
发明人： Max P. McDaniel , Carlton E. Ash , Kathy S. Clear , Eric D. Schwerdtfeger , Carlos A. Cruz , Jeremy M. Praetorius , Youlu Yu
CPC分类号： C08F10/02 , B01J8/08 , B01J19/2455 , C08K3/08 , C08K3/36
摘要： Supported chromium catalysts containing a solid oxide and 0.1 to 15 wt. % chromium, in which the solid oxide or the supported chromium catalyst has a particle size span from 0.5 to 1.4, less than 3 wt. % has a particle size greater than 100 μm, and less than 10 wt. % has a particle size less than 10 μm, can be contacted with an olefin monomer in a loop slurry reactor to produce an olefin polymer. Representative ethylene-based polymers produced using the chromium catalysts have a HLMI of 4 to 70 g/10 min, a density from 0.93 to 0.96 g/cm3, from 150 to 680 ppm solid oxide (such as silica), from 1.5 to 6.8 ppm chromium, and a film gel count of less than 15 catalyst particle gels per ft2 of 25 micron thick film and/or a gel count of less than or equal to 50 catalyst particles of greater than 100 μm per five grams of the ethylene polymer.
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4.发明授权公开(公告)号：US11814455B2
公开(公告)日：2023-11-14
申请号：US17935612
申请日：2022-09-27
发明人： Carlos A. Cruz , Yongwoo Inn , John R. Rathman , Youlu Yu , Ashish M. Sukhadia , Jay M. Chaffin
IPC分类号： C08F210/02 , C08F210/16 , C08K5/14 , C08F10/02
CPC分类号： C08F210/02 , C08K5/14 , C08F10/02 , C08F210/16 , C08F10/02 , C08F2810/10
摘要： Ethylene-based polymers are generally characterized by a high load melt index of less than 12 g/10 min, a weight-average molecular weight from 200,000 to 550,000 g/mol, a number-average molecular weight from 18,000 to 48,000 g/mol, a CY-a parameter of less than 0.12, a tan δ at 0.1 sec−1 from 0.5 to 0.9 degrees, a tan δ at 100 sec−1 from 0.5 to 0.75 degrees, and a viscosity at 0.001 sec−1 from 1.3×106 to 1×107 Pa-sec. These ethylene polymers can be produced by peroxide-treating a bimodal molecular weight distribution dual metallocene-catalyzed resin, and can be used to produce blow molded bottles and other blow molded products.
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5.发明申请公开(公告)号：US20220289880A1
公开(公告)日：2022-09-15
申请号：US17200976
申请日：2021-03-15
发明人： Carlos A. Cruz , Yongwoo Inn , John R. Rathman , Youlu Yu , Ashish M. Sukhadia , Jay M. Chaffin
IPC分类号： C08F210/02 , C08K5/14
摘要： Ethylene-based polymers are generally characterized by a high load melt index of less than 12 g/10 min, a weight-average molecular weight from 200,000 to 550,000 g/mol, a number-average molecular weight from 18,000 to 48,000 g/mol, a CY-a parameter of less than 0.12, a tan δ at 0.1 sec−1 from 0.5 to 0.9 degrees, a tan δ at 100 sec−1 from 0.5 to 0.75 degrees, and a viscosity at 0.001 sec−1 from 1.3×106 to 1×107 Pa-sec. These ethylene polymers can be produced by peroxide-treating a bimodal molecular weight distribution dual metallocene-catalyzed resin, and can be used to produce blow molded bottles and other blow molded products.
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公开(公告)号：US20210309841A1
公开(公告)日：2021-10-07
申请号：US16837009
申请日：2020-04-01
发明人： Errun Ding , Chung Ching Tso , Max P. McDaniel , Ashish M. Sukhadia , Youlu Yu , Randall S. Muninger , Aaron M. Osborn , Christopher E. Wittner
IPC分类号： C08L23/08 , C08F210/16 , C08F4/6592
摘要： Disclosed herein are ethylene-based polymers generally characterized by a melt index of less than 15 g/10 min, a density from 0.91 to 0.945 g/cm3, a CY-a parameter at 190° C. from 0.2 to 0.6, an average number of long chain branches per 1,000,000 total carbon atoms of the polymer in a molecular weight range of 500,000 to 2,000,000 g/mol of less than 5, and a maximum ratio of ηE/3η at an extensional rate of 0.03 sec−1 in a range from 3 to 15. The ethylene polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in the lower molecular weight fraction, such that polymer melt strength and bubble stability are maintained for the fabrication of blown films and other articles of manufacture. These ethylene polymers can be produced using a dual catalyst system containing a single atom bridged metallocene compound with an indenyl group and a cyclopentadienyl group, and an unbridged hafnium metallocene compound with two cyclopentadienyl groups.
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7.发明申请公开(公告)号：US20210277153A1
公开(公告)日：2021-09-09
申请号：US17320401
申请日：2021-05-14
发明人： Youlu Yu , Paul J. DesLauriers , Yongwoo Inn
摘要： A method of determining multimodal polyethylene quality comprising the steps of (a) providing a multimodal polyethylene resin sample; (b) determining, in any sequence, the following: that the multimodal polyethylene resin sample has a melt index within 30% of a target melt index; that the multimodal polyethylene resin sample has a density within 2.5% of a target density; that the multimodal polyethylene resin sample has a dynamic viscosity deviation (% MVD) from a target dynamic viscosity of less than about 100%; that the multimodal polyethylene resin sample has a weight average molecular weight (Mw) deviation (% MwD) from a target Mw of less than about 20%; and that the multimodal polyethylene resin sample has a gel permeation chromatography (GPC) curve profile deviation (% GPCD) from a target GPC curve profile of less than about 15%; and (c) responsive to step (b), designating the multimodal polyethylene resin sample as a high quality resin.
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公开(公告)号：US10927201B2
公开(公告)日：2021-02-23
申请号：US16554784
申请日：2019-08-29
发明人： Errun Ding , Chung C. Tso , Youlu Yu , Qing Yang , Richard M. Buck
IPC分类号： C08F210/02 , C08F210/16 , C08F4/659
摘要： Catalyst systems having both a metallocene catalyst component and a Ziegler-Natta component are disclosed. Such catalyst systems can contain a metallocene compound, an activator-support, an organoaluminum compound, and a Ziegler-Natta component comprising titanium supported on magnesium chloride.
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公开(公告)号：US10323108B2
公开(公告)日：2019-06-18
申请号：US15298540
申请日：2016-10-20
IPC分类号： B01J21/08 , B01J23/26 , B01J37/08 , C08F4/78 , C08F110/02 , C08F10/02 , C08F210/02 , B01J35/10 , C08F4/18
摘要： A polymer having a long chain branching content peaking at greater than about 20 long chain branches per million carbon atoms, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 8 long chain branches per million carbon atoms, a polydispersity index of greater than about 20 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 1 long chain branches per chain, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution.
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公开(公告)号：US20180162970A1
公开(公告)日：2018-06-14
申请号：US15890524
申请日：2018-02-07
发明人： Errun Ding , Chung C. Tso , Youlu Yu , Qing Yang , Richard M. Buck
IPC分类号： C08F210/02 , C08F210/16 , C08F4/659
CPC分类号： C08F210/02 , C08F4/65912 , C08F210/16 , C08F4/65904 , C08F4/6592 , C08F210/14 , C08F2500/12 , C08F2500/17 , C08F110/02
摘要： Catalyst systems having both a metallocene catalyst component and a Ziegler-Natta component are disclosed. Such catalyst systems can contain a metallocene compound, an activator-support, an organoaluminum compound, and a Ziegler-Natta component comprising titanium supported on magnesium chloride.
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