公开(公告)号：US10899855B2

公开(公告)日：2021-01-26

申请号：US16166224

申请日：2018-10-22

Applicant: Chevron Phillips Chemical Company LP

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

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

Abstract: 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：US10654948B2

公开(公告)日：2020-05-19

申请号：US13799471

申请日：2013-03-13

Applicant: Chevron Phillips Chemical Company LP

Inventor： Carlos A. Cruz ,  Qing Yang ,  Max P. McDaniel ,  Joel L. Martin ,  Tony R. Crain ,  Steve M. Wharry ,  Jared L. Barr ,  Youlu Yu

IPC: C08F10/02 ,  C08F4/659 ,  C08F110/02

Abstract: An ethylene polymer having a density greater than about 0.930 g/ml and a level of long chain branching ranging from about 0.001 LCB/103 carbons to about 1.5 LCB/103 carbons as determined by SEC-MALS. An ethylene polymer having a level of short chain branching ranging from about 0 to about 10 mol. % and a level of long chain branching ranging from about 0.001 LCB/103 carbons to about 1.5 LCB/103 carbons as determined by SEC-MALS. An ethylene polymer having a polydispersity index ranging from about 8 to about 25 and a level of long chain branching ranging from about 0.001 LCB/103 carbons to about 1.5 LCB/103 carbons as determined by SEC-MALS.

公开(公告)号：US10577440B2

公开(公告)日：2020-03-03

申请号：US14933847

申请日：2015-11-05

Applicant: Chevron Phillips Chemical Company LP

Inventor： Carlos A. Cruz ,  Max P. McDaniel ,  Qing Yang ,  Jared L. Barr ,  Youlu Yu

IPC: C08F10/02

Abstract: A radically coupled polymer having a density of from about 0.915 g/ml to about 0.975 g/ml characterized by a crossover modulus measured in Pascals (Pa) that is equal to or less than ymn where ymn=180,000e−0.15x and x is the number average molecular weight of the radically coupled polymer divided by 1,000. An ethylene polymer having a level of short chain branching ranging from about 0 to about 10 mol. %; a level of long chain branching ranging from about 0.001 LCB/103 carbons to about 1.5 LCB/103 carbons as determined by SEC-MALS; and characterized by a crossover modulus measured in Pa that is equal to or less than ymn where ymn=180,000−0.15x and x is the number average molecular weight of the radically coupled polymer divided by 1,000.

公开(公告)号：US20190322823A1

公开(公告)日：2019-10-24

申请号：US16459656

申请日：2019-07-02

Applicant: Chevron Phillips Chemical Company LP

Inventor： Jeremy M. Praetorius ,  Chung C. Tso ,  Qing Yang ,  Yongwoo Inn ,  John T. Blagg ,  Ashish M. Sukhadia

IPC: C08J5/18 ,  C08L23/08

Abstract: Disclosed are ethylene polymer compositions containing a homogeneously-branched first ethylene polymer component and 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 melt index less than 3.5 g/10 min, and a CY-a parameter at 190° C. from 0.25 to 0.65. 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.

公开(公告)号：US10435492B2

公开(公告)日：2019-10-08

申请号：US15890524

申请日：2018-02-07

Applicant: Chevron Phillips Chemical Company LP

Inventor： Errun Ding ,  Chung C. Tso ,  Youlu Yu ,  Qing Yang ,  Richard M. Buck

IPC: C08F210/02 ,  C08F210/16 ,  C08F4/659

Abstract: 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.

公开(公告)号：US20190303539A1

公开(公告)日：2019-10-03

申请号：US16006899

申请日：2018-06-13

Applicant: Chevron Phillips Chemical Company LP

Inventor： Richard M. Buck ,  Qing Yang

IPC: G06F19/00 ,  B01J31/22 ,  G01N21/31 ,  G06F17/17

Abstract: Methods for simultaneously determining the concentrations of transition metal compounds in solutions containing two or more transition metal compounds are described. Polymerization reactor systems providing real-time monitoring and control of the concentrations of the transition metal components of a multicomponent catalyst system are disclosed, as well as methods for operating such polymerization reactor systems, and for improving methods of preparing the multicomponent catalyst system.

公开(公告)号：US10358506B2

公开(公告)日：2019-07-23

申请号：US15723225

申请日：2017-10-03

Applicant: Chevron Phillips Chemical Company LP

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

IPC: C08F4/653 ,  C08F4/6592 ,  C08F210/16 ,  C08L23/08 ,  C08F4/6192 ,  C08F4/64 ,  C08F10/02 ,  C08F4/659

Abstract: Disclosed herein are ethylene-based polymers generally characterized by a density from 0.89 to 0.93 g/cm3, a ratio of Mw/Mn from 3 to 6.5, a Mz from 200,000 to 650,000 g/mol, a CY-a parameter at 190° C. from 0.2 to 0.4, and a reverse short chain branching distribution. The ATREF profile of these polymers can have a high temperature peak from 92 to 102° C., and a low temperature peak from 18 to 36° C. less than that of the high temperature peak. These polymers can have comparable physical properties to that of a metallocene-catalyzed LLDPE, but with improved processability, shear thinning, and melt strength, and can be used in blown film and other end-use applications.

公开(公告)号：US20190169332A1

公开(公告)日：2019-06-06

申请号：US16266176

申请日：2019-02-04

Applicant: Chevron Phillips Chemical Company LP

Inventor： Max P. McDaniel ,  Qing Yang ,  Randy S. Muninger ,  Elizabeth A. Benham ,  Kathy S. Clear

IPC: C08F210/16 ,  C08F210/08 ,  C08F10/02 ,  C08F110/02 ,  C08F210/06

Abstract: Silica-coated alumina activator-supports, and catalyst compositions containing these activator-supports, are disclosed. Methods also are provided for preparing silica-coated alumina activator-supports, for preparing catalyst compositions, and for using the catalyst compositions to polymerize olefins.

公开(公告)号：US20190143287A1

公开(公告)日：2019-05-16

申请号：US16248960

申请日：2019-01-16

Applicant: Chevron Phillips Chemical Company LP

Inventor： Elizabeth A. Benham ,  Albert P. Masino ,  Qing Yang ,  Randy S. Muninger ,  Rebecca A. Gonzales

IPC: B01J4/02 ,  B01J14/00 ,  B01J19/18 ,  B01J4/00 ,  C08F110/02 ,  B01J19/12 ,  B01J19/06 ,  C08F4/00

Abstract: Techniques are provided for catalyst preparation. A system for catalyst preparation may include an agitator disposed inside a polymerization catalyst tank and configured to mix a polymerization catalyst and a solvent to generate a polymerization catalyst solution. The system may also include a heating system coupled to the polymerization catalyst tank and configured to maintain a temperature of the polymerization catalyst solution above a threshold. The system may also include a precontactor configured to receive feed streams comprising an activator and the polymerization catalyst solution from the polymerization catalyst tank to generate a catalyst complex. The system may also include a transfer line configured to transfer the catalyst complex from an outlet of the precontactor to a reactor.

公开(公告)号：US20190025200A1

公开(公告)日：2019-01-24

申请号：US16006976

申请日：2018-06-13

Applicant: Chevron Phillips Chemical Company LP

Inventor： Qing Yang ,  Richard M. Buck

IPC: G01N21/31 ,  G01N21/33 ,  G01N21/84 ,  G01N1/40 ,  B01J31/22 ,  B01J37/04 ,  C08F2/01

Abstract: Methods for determining the concentration of transition metal compounds in a solution containing more than one transition metal compound are described. Polymerization reactor systems providing real-time monitoring and control of the concentrations of the transition metal components of a multicomponent catalyst system are disclosed, as well as methods for operating such polymerization reactor systems and for improving methods of preparing the multicomponent catalyst system.