公开(公告)号：US08771816B2

公开(公告)日：2014-07-08

申请号：US13660777

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 ,  Pamela L. Maeger

IPC: B29C47/00 ,  C08F110/02 ,  F16L9/00 ,  F16L9/12

CPC classification number: C08F110/02 ,  C08L23/04 ,  C08L23/06 ,  F16L9/00 ,  F16L9/12 ,  G01N3/24 ,  G01N11/04 ,  G06F17/10 ,  G06F19/703 ,  Y10T428/139

Abstract: A method of preparing a medium-density polyethylene pipe comprising melting a multimodal metallocene-catalyzed polyethylene resin to form a molten polyethylene, wherein the multimodal metallocene-catalyzed polyethylene resin has a density of from about 0.925 g/ml to about 0.942 g/ml, a magnitude of slip-stick greater than about 300 psi, a stress for smooth to matte transition of greater than about 90 kPa of stress, and a shear rate for smooth to matte transition greater than about 10 s−1, wherein the magnitude of slip-stick, stress for smooth to matte transition, and shear rate for smooth to matte transition are determined by a capillary rheology test; and forming the molten polyethylene resin into pipe. A pipe prepared from a multimodal metallocene-catalyzed polyethylene resin having a density of from about 0.925 g/ml to about 0.942 g/ml, a magnitude of slip-stick greater than about 300 psi; a stress for smooth to matte transition of greater than about 90 kPa, and a shear rate for smooth to matte transition greater than about 10 s−1, wherein the magnitude of slip-stick, stress for smooth to matte transition, and shear rate for smooth to matte transition are determined by a capillary rheology test.

Abstract translation: 一种制备中密度聚乙烯管的方法，包括熔化多峰茂金属催化的聚乙烯树脂以形成熔融聚乙烯，其中多峰茂金属催化的聚乙烯树脂的密度为约0.925g / ml至约0.942g / ml， 大于约300psi的滑棒的大小，大于约90kPa应力的平滑无光泽转变的应力和大于约10s -1的平滑到无光泽转变的剪切速率，其中滑移的大小 通过毛细管流变学测试确定平滑无光泽过渡的应力和平滑到无光泽过渡的剪切速率; 并将熔融的聚乙烯树脂形成管。 由密度为约0.925g / ml至约0.942g / ml的多峰金属茂催化的聚乙烯树脂制备的管，滑棒的大小大于约300psi; 大于约90kPa的平滑无光泽转变的应力，以及大于约10s -1的平滑到无光泽转变的剪切速率，其中滑棒的大小，光滑到无光泽的转变的应力和剪切速率 通过毛细管流变学测试确定光滑的无光泽转变。

公开(公告)号：US20140163181A1

公开(公告)日：2014-06-12

申请号：US13706389

申请日：2012-12-06

Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP

Inventor： Qing Yang ,  Max P. McDaniel ,  Tony R. Crain ,  Youlu Yu ,  Yongwoo Inn

IPC: C08F4/6592

CPC classification number: C08F110/02 ,  C08F4/65904 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/6592 ,  C08F4/65925 ,  C08F4/65927 ,  C08F210/00 ,  C08F210/16 ,  C08L23/00 ,  C08L23/0815 ,  C08L2314/06 ,  Y10S526/943 ,  C08F2500/04 ,  C08F2500/12 ,  C08F2500/24 ,  C08F2500/05 ,  C08F210/14 ,  C08L23/06

Abstract: Disclosed herein are polymerization processes for the production of olefin polymers. These polymerization processes use a catalyst system containing three metallocene components, often resulting in polymers having a reverse comonomer distribution and a broad and non-bimodal molecular weight distribution.

Abstract translation: 本文公开了用于生产烯烃聚合物的聚合方法。 这些聚合方法使用含有三种茂金属组分的催化剂体系，其常常导致聚合物具有反向共聚单体分布和广泛的和非双峰分子量分布。

公开(公告)号：US12122857B2

公开(公告)日：2024-10-22

申请号：US17552451

申请日：2021-12-16

Applicant: Chevron Phillips Chemical Company LP

Inventor： Max P. McDaniel ,  Graham R. Lief ,  Qing Yang ,  Carlos A. Cruz ,  Yongwoo Inn ,  Jared Barr

IPC: C08F4/6592 ,  C07F17/00 ,  C08F4/02 ,  C08F4/659 ,  C08F10/02 ,  C08F10/14 ,  C08F210/16

CPC classification number: C08F10/02 ,  C07F17/00 ,  C08F4/02 ,  C08F4/025 ,  C08F4/65916 ,  C08F10/14 ,  C08F210/16

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.

公开(公告)号：US20240076424A1

公开(公告)日：2024-03-07

申请号：US18496994

申请日：2023-10-30

Applicant: Chevron Phillips Chemical Company LP

Inventor： Errun Ding ,  Qing Yang ,  Randall S. Muninger ,  Youlu Yu ,  Yongwoo Inn

IPC: C08F10/02 ,  C08F2/34 ,  C08F4/6592

CPC classification number: C08F10/02 ,  C08F2/34 ,  C08F4/65922 ,  C08F2500/01 ,  C08F2500/04 ,  C08F2500/12 ,  C08F2500/17

Abstract: 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.

公开(公告)号：US20240052073A1

公开(公告)日：2024-02-15

申请号：US18487175

申请日：2023-10-16

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

CPC classification number: C08F210/02 ,  C08F210/16 ,  C08L23/0815 ,  C08F2420/01 ,  C08F2420/03 ,  C08F4/65925

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.

公开(公告)号：US11866529B2

公开(公告)日：2024-01-09

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: C08L23/08 ,  C08F210/16 ,  C08F4/653 ,  C08F4/6592 ,  C08F210/02

CPC classification number: C08F210/02 ,  C08F210/16 ,  C08L23/0815 ,  C08F4/65925 ,  C08F4/65927 ,  C08F2420/01 ,  C08F2420/03

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.

公开(公告)号：US11814455B2

公开(公告)日：2023-11-14

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 ,  C08F210/16 ,  C08K5/14 ,  C08F10/02

CPC classification number: C08F210/02 ,  C08K5/14 ,  C08F10/02 ,  C08F210/16 ,  C08F10/02 ,  C08F2810/10

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 1.3×106 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.

公开(公告)号：US11578156B2

公开(公告)日：2023-02-14

申请号：US17074784

申请日：2020-10-20

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: C08L23/08 ,  C08F210/16 ,  C08F4/653 ,  C08F4/6592 ,  C08F210/02

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.

公开(公告)号：US20220289880A1

公开(公告)日：2022-09-15

申请号：US17200976

申请日：2021-03-15

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 1.3×106 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.

公开(公告)号：US20220275183A1

公开(公告)日：2022-09-01

申请号：US17745962

申请日：2022-05-17

Applicant: Chevron Phillips Chemical Company LP

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

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

Abstract: 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.