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公开(公告)号：US20130325363A1
公开(公告)日：2013-12-05
申请号：US13660750
申请日：2012-10-25
Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
Inventor： Paul J. DesLauriers , Yongwoo Inn , Qing Yang , Ashish M. Sukhadia , David C. Rohlfing
CPC classification number: C08F110/02 , C08L23/04 , C08L23/06 , F16L9/00 , F16L9/12 , G01N3/24 , G01N11/04 , G06F17/10 , G16C20/20 , Y10T428/139
Abstract: A system for improving processing of polyethylene resins, comprising a processor; a memory; an output device; and an analysis component stored in the memory, that when executed on the processor, configures the processor to receive a shear stress as a function of shear rate for a plurality of multimodal metallocene-catalyzed polyethylene samples, wherein the determination of the shear stress as a function of the shear rate comprises using capillary rheometry; determine values for a magnitude of slip-stick, a stress for smooth to matte transition, and a shear rate for smooth to matte transition for each of the plurality of multimodal metallocene-catalyzed polyethylene samples based on the shear stress and the shear rate measured from capillary rheometry; identify individual multimodal metallocene-catalyzed polyethylene resins from the plurality of multimodal metallocene-catalyzed polyethylene samples having a reduced tendency to melt fracture characterized by a magnitude of slip-stick greater than about 300 psi, a stress for smooth to matte transition greater than about 90 kPa, and a shear rate for smooth to matte transition greater than about 10 s−1; and output an identification of the individual multimodal metallocene-catalyzed polyethylene resins to the output device.
Abstract translation: 一种用于改善聚乙烯树脂加工的系统，包括处理器; 记忆 输出设备; 以及存储在所述存储器中的分析组件，当在所述处理器上执行时，所述分析组件将所述处理器配置为接受剪切应力作为多个多峰茂金属催化的聚乙烯样品的剪切速率的函数，其中所述剪切应力的确定为 剪切速率的函数包括使用毛细管流变学; 基于剪切应力和剪切速率，确定滑移棒的大小，平滑到无光泽过渡的应力值，以及用于多个多峰茂金属催化的聚乙烯样品中的每一个的光滑到无光泽转变的剪切速率 毛细血管流变学; 从多个多峰茂金属催化的聚乙烯样品中鉴定出具有降低的熔融断裂倾向的单个多峰金属茂催化的聚乙烯树脂，其特征在于大于约300psi的滑棒大小，平滑至无光泽转变的应力大于约90 kPa，以及平滑到无光泽转变的剪切速率大于约10s -1; 并输出单个多峰茂金属催化的聚乙烯树脂的标识到输出装置。
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公开(公告)号：US20250011481A1
公开(公告)日：2025-01-09
申请号：US18882898
申请日：2024-09-12
Applicant: Chevron Phillips Chemical Company LP
Inventor： Max P. McDaniel , Graham R. Lief , Qing Yang , Carlos A. Cruz , Yongwoo Inn , Jared Barr
Abstract: Methods for controlling the long chain branch content of ethylene homopolymers and copolymers produced in a polymerization process include the steps of contacting a metallocene compound, an organoaluminum compound, a high LCB activator-support, and a low LCB activator-support to form a catalyst composition, contacting the catalyst composition with ethylene and an optional olefin comonomer in a polymerization reactor system under polymerization conditions to produce an ethylene polymer having a LCB content, and controlling the relative amount of the high LCB activator-support and the low LCB activator-support in the catalyst composition to adjust the LCB content of the ethylene polymer.
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73.发明授权公开(公告)号：US11859024B2
公开(公告)日：2024-01-02
申请号：US17571665
申请日：2022-01-10
Applicant: Chevron Phillips Chemical Company LP
Inventor： Jeremy M. Praetorius , Alfred E. Brown, Jr. , Yongwoo Inn , Youlu Yu , Qing Yang , Ashish M. Sukhadia
IPC: C08F210/16 , B29C49/00 , C08F4/6592 , B29K23/00 , C08F210/02
CPC classification number: C08F210/16 , B29C49/0005 , C08F4/65927 , B29K2023/08 , C08F210/02 , C08F2500/09 , C08F2500/12 , C08F2500/17
Abstract: Ethylene-based polymers are characterized by a melt index less than 1 g/10 min, a density from 0.94 to 0.965 g/cm3, a Mw from 100,000 to 250,000 g/mol, a relaxation time from 0.5 to 3 sec, and an average number of long chain branches (LCBs) per 1,000,000 total carbon atoms in a molecular weight range of 300,000 to 900,000 g/mol that is greater than that in a molecular weight range of 1,000,000 to 2,000,000 g/mol, or an average number of LCBs per 1,000,000 total carbon atoms in a molecular weight range of 1,000,000 to 2,000,000 g/mol of less than or equal to about 5 and a maximum ratio of ηE/3η at an extensional rate of 0.1 sec−1 from 1.2 to 10. These polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in a lower molecular weight fraction, such that polymer melt strength and parison stability are maintained for the fabrication of blow molded products and other articles of manufacture. These ethylene polymers can be produced using a dual catalyst system containing a single or two atom bridged metallocene compound with two indenyl groups, and a single atom bridged metallocene compound with a fluorenyl group and a cyclopentadienyl group.
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74.发明授权公开(公告)号：US11708433B2
公开(公告)日：2023-07-25
申请号：US17320401
申请日：2021-05-14
Applicant: Chevron Phillips Chemical Company LP
Inventor： Youlu Yu , Paul J. DesLauriers , Yongwoo Inn
CPC classification number: C08F10/02 , B01J19/0006 , B01J19/2445 , B01J19/0013 , B01J19/0033 , B01J2219/0024 , B01J2219/00193 , B01J2219/00195 , B01J2219/00207 , B01J2219/00209 , B01J2219/00211 , B01J2219/00213 , B01J2219/00216 , B01J2219/00227 , C08F210/02 , C08F2400/02 , C08F2500/00 , C08F2500/05 , C08F2500/12 , C08F2500/17 , G01N33/442 , G05B13/00 , G05B21/00 , C08F10/02 , C08F2500/05 , C08F2500/17
Abstract: 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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75.发明申请公开(公告)号：US20230124846A1
公开(公告)日：2023-04-20
申请号：US18062091
申请日：2022-12-06
Applicant: Chevron Phillips Chemical Company LP
Inventor： Jeremy M. Praetorius , Yongwoo Inn , Alfred E. Brown, JR. , Brandy Rutledge-Ryal , Carlos A. Cruz , Jay M. Chaffin
IPC: C08F210/02 , C08F210/16 , C08L23/08
Abstract: Ethylene-based polymers having a density of 0.952 to 0.968 g/cm3. a ratio of HLMI/MI from 185 to 550. an IB parameter from 1.46 to 1.80, a tan δ at 0.1 sec-1 from 1.05 to 1.75 degrees, and a slope of a plot of viscosity versus shear rate at 100 sec-1 from 0.18 to 0.28 are described, with low melt flow versions having a HLMI from 10 to 30 g/10 min and a Mw from 250,000 to 450,000 g/mol, and high melt flow versions having a HLMI from 30 to 55 g/10 min and a Mw from 200,000 to 300,000 g/mol. These polymers have the processability of chromium-based resins, but with improved stress crack resistance and topload strength for bottles and other blow molded products.
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Patent Agency Ranking
76.发明申请公开(公告)号：US20230019739A1
公开(公告)日：2023-01-19
申请号：US17935612
申请日：2022-09-27
Applicant: Chevron Phillips Chemical Company LP
Inventor： Carlos A. Cruz , Yongwoo Inn , John R. Rathman , Youlu Yu , Ashish M. Sukhadia , Jay M. Chaffin
IPC: C08F210/02 , C08K5/14
Abstract: 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 x 106 to 1 x 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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77.发明申请公开(公告)号：US20220315744A1
公开(公告)日：2022-10-06
申请号：US17841803
申请日：2022-06-16
Applicant: Chevron Phillips Chemical Company LP
Inventor： Jeremy M. Praetorius , Chung Ching Tso , Ashish M. Sukhadia , Yongwoo Inn , Qing Yang , John T. Blagg
Abstract: Disclosed are ethylene polymer compositions containing a homogeneously-branched first ethylene polymer component and 15-35 wt. % of a homogeneously-branched second ethylene polymer component of higher density than the first ethylene polymer component. The ethylene polymer composition can be characterized by a density from 0.912 to 0.925 g/cm3, a ratio of Mw/Mn from 2 to 5, a melt index less than 2 g/10 min, and a CY-a parameter at 190° C. from 0.35 to 0.7. These polymer compositions have the excellent dart impact strength and optical properties of a metallocene-catalyzed LLDPE, but with improved machine direction tear resistance, and can be used in blown film and other end-use applications. Further, methods for improving film Elmendorf tear strength also are described.
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78.发明授权公开(公告)号：US11332601B2
公开(公告)日：2022-05-17
申请号：US16838086
申请日：2020-04-02
Applicant: Chevron Phillips Chemical Company LP
Inventor： Jeremy M. Praetorius , Chung Ching Tso , Ashish M. Sukhadia , Yongwoo Inn , Qing Yang , John T. Blagg
Abstract: Disclosed are ethylene polymer compositions containing a homogeneously-branched first ethylene polymer component and 15-35 wt. % of a homogeneously-branched second ethylene polymer component of higher density than the first ethylene polymer component. The ethylene polymer composition can be characterized by a density from 0.912 to 0.925 g/cm3, a ratio of Mw/Mn from 2 to 5, a melt index less than 2 g/10 min, and a CY-a parameter at 190° C. from 0.35 to 0.7. These polymer compositions have the excellent dart impact strength and optical properties of a metallocene-catalyzed LLDPE, but with improved machine direction tear resistance, and can be used in blown film and other end-use applications. Further, methods for improving film Elmendorf tear strength also are described.
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公开(公告)号：US20220098342A1
公开(公告)日：2022-03-31
申请号：US17547341
申请日：2021-12-10
Applicant: Chevron Phillips Chemical Company LP
Inventor： Vivek Rohatgi , Ashish M. Sukhadia , Yongwoo Inn , Elizabeth M. Lanier
IPC: C08F210/16 , C08F10/02 , C08L23/08 , C08K5/14 , C08F8/00 , C08F210/02 , C08L23/06
Abstract: Disclosed herein are ethylene-based polymers generally characterized by a density of at least 0.94 g/cm3, a high load melt index from 4 to 20 g/10 min, a zero-shear viscosity at 190° C. from 20,000 to 400,000 kPa-sec, and a relaxation time at 190° C. from 225 to 3000 sec. These ethylene polymers can be produced by peroxide-treating a broad molecular weight distribution Ziegler-catalyzed resin, and can be used in large diameter, thick wall pipes and other end-use applications.
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80.发明授权公开(公告)号：US11267919B2
公开(公告)日：2022-03-08
申请号：US16898502
申请日：2020-06-11
Applicant: Chevron Phillips Chemical Company LP
Inventor： Jeremy M. Praetorius , Alfred E. Brown, Jr. , Yongwoo Inn , Youlu Yu , Qing Yang , Ashish M. Sukhadia
IPC: C08F210/16 , C08F210/02 , C08F4/64 , C08F4/76 , C08F4/6592 , B29C49/00 , B29K23/00
Abstract: Ethylene-based polymers are characterized by a melt index less than 1 g/10 min, a density from 0.94 to 0.965 g/cm3, a Mw from 100,000 to 250,000 g/mol, a relaxation time from 0.5 to 3 sec, and an average number of long chain branches (LCBs) per 1,000,000 total carbon atoms in a molecular weight range of 300,000 to 900,000 g/mol that is greater than that in a molecular weight range of 1,000,000 to 2,000,000 g/mol, or an average number of LCBs per 1,000,000 total carbon atoms in a molecular weight range of 1,000,000 to 2,000,000 g/mol of less than or equal to about 5 and a maximum ratio of ηE/3η at an extensional rate of 0.1 sec−1 from 1.2 to 10. These polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in a lower molecular weight fraction, such that polymer melt strength and parison stability are maintained for the fabrication of blow molded products and other articles of manufacture. These ethylene polymers can be produced using a dual catalyst system containing a single or two atom bridged metallocene compound with two indenyl groups, and a single atom bridged metallocene compound with a fluorenyl group and a cyclopentadienyl group.
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