公开(公告)号：US20130289226A1

公开(公告)日：2013-10-31

申请号：US13927165

申请日：2013-06-26

Applicant: Chevron Phillips Chemical Company LP

Inventor： Errun Ding ,  Qing Yang ,  Albert P. Masino ,  Youlu Yu ,  Lloyd W. Guatney ,  Jim B. Askew

IPC: C08F210/16

CPC classification number: C08F210/16 ,  C08F10/00 ,  C08F110/02 ,  C08F2400/02 ,  C08F2/00 ,  C08F2/42 ,  C08F2500/04 ,  C08F2500/12

Abstract: Methods of controlling polymerization reactions using a synergistic amount of hydrogen and an organozinc compound are disclosed. The resulting polymers have lower molecular weights and higher melt flow indices.

公开(公告)号：US12031022B2

公开(公告)日：2024-07-09

申请号：US17732628

申请日：2022-04-29

Applicant: Chevron Phillips Chemical Company LP

Inventor： Errun Ding ,  Chung Ching Tso ,  Max P. McDaniel ,  Ashish M. Sukhadia ,  Youlu Yu ,  Randall S. Muninger ,  Aaron M. Osborn ,  Christopher E. Wittner

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

CPC classification number: C08L23/0815 ,  C08F4/65925 ,  C08F4/65927 ,  C08F210/16 ,  C08L2203/16 ,  C08L2207/066

Abstract: 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.

公开(公告)号：US11674023B2

公开(公告)日：2023-06-13

申请号：US17071616

申请日：2020-10-15

Applicant: Chevron Phillips Chemical Company LP

Inventor： Youlu Yu ,  Eric D. Schwerdtfeger ,  Jeffrey S. Fodor ,  David A. Soules

IPC: C08L23/08

CPC classification number: C08L23/0815

Abstract: A bimodal polymer composition comprising a lower molecular weight homopolymer and a higher molecular weight copolymer wherein the bimodal polymer composition has a density of from about 0.930 gram per cubic centimeter (g/cc) to about 0.970 g/cc, a ratio of high load melt index:melt index of from about 10 to about 150 and an Environmental Stress Crack Resistance (ESCR) of from about 25 hours to about 300 hours when measured in accordance with ASTM D1693 or ASTM D2561. A chromium-catalyzed polymer composition comprising (i) a lower molecular weight homopolymer and (ii) a higher molecular weight copolymer, wherein the bimodal polymer composition has an Environmental Stress Crack Resistance (ESCR) of from about 25 hours to about 300 hours when measured in accordance with ASTM D1693 or ASTM D2561.

公开(公告)号：US11667777B2

公开(公告)日：2023-06-06

申请号：US17160481

申请日：2021-01-28

Applicant: Chevron Phillips Chemical Company LP

Inventor： Graham R. Lief ,  Qing Yang ,  Youlu Yu

IPC: C08L23/08 ,  C08F4/653 ,  C08F4/6592 ,  C08F210/16 ,  C08F2/34 ,  C08F4/659

CPC classification number: C08L23/0815 ,  C08F2/34 ,  C08F4/65904 ,  C08F4/65912 ,  C08F4/65925 ,  C08F4/65927 ,  C08F210/16 ,  C08F2420/00 ,  C08L2207/062

Abstract: Ethylene-based polymers are characterized by a density from 0.92 to 0.955 g/cm3, a HLMI of less than 35 g/10 min, and a ratio of a number of short chain branches (SCBs) per 1000 total carbon atoms at Mz to a number of SCBs per 1000 total carbon atoms at Mn in a range from 11.5 to 22. These polymers can have a higher molecular weight (HMW) component and a lower molecular weight (LMW) component, in which a ratio of a number of SCBs per 1000 total carbon atoms at Mn of the HMW component to a number of SCBs per 1000 total carbon atoms at Mn of the LMW component is in a range from 10.5 to 22. These ethylene polymers can be produced using a dual catalyst system containing an unbridged metallocene compound with an indenyl group having at least one halogen-substituted hydrocarbyl substituent with at least two halogen atoms, and a single atom bridged metallocene compound with a fluorenyl group and a cyclopentadienyl group.

公开(公告)号：US11505630B2

公开(公告)日：2022-11-22

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: C08F10/02 ,  C08F210/16 ,  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：US11339279B2

公开(公告)日：2022-05-24

申请号：US16837009

申请日：2020-04-01

Applicant: Chevron Phillips Chemical Company LP

Inventor： Errun Ding ,  Chung Ching Tso ,  Max P. McDaniel ,  Ashish M. Sukhadia ,  Youlu Yu ,  Randall S. Muninger ,  Aaron M. Osborn ,  Christopher E. Wittner

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

Abstract: 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.

公开(公告)号：US20220153887A1

公开(公告)日：2022-05-19

申请号：US17591673

申请日：2022-02-03

Applicant: Chevron Phillips Chemical Company LP

Inventor： Max P. McDaniel ,  Carlton E. Ash ,  Kathy S. Clear ,  Eric D. Schwerdtfeger ,  Carlos A. Cruz ,  Jeremy M. Praetorius ,  Youlu Yu

IPC: C08F210/16 ,  C08J5/18

Abstract: Catalyst compositions containing a metallocene compound, a solid activator, and a co-catalyst, in which the solid activator or the supported metallocene catalyst has a d50 average particle size of 15 to 50 μm and a particle size distribution of 0.5 to 1.5, can be contacted with an olefin in a loop slurry reactor to produce an olefin polymer. A representative ethylene-based polymer produced using the catalyst composition has excellent dart impact strength and low gels, and can be characterized by a HLMI from 4 to 10 g/10 min, a density from 0.944 to 0.955 g/cm3, a higher molecular weight component with a Mn from 280,000 to 440,000 g/mol, and a lower molecular weight component with a Mw from 30,000 to 45,000 g/mol and a ratio of Mz/Mw ranging from 2.3 to 3.4.

公开(公告)号：US11326005B1

公开(公告)日：2022-05-10

申请号：US17370022

申请日：2021-07-08

Applicant: Chevron Phillips Chemical Company LP

Inventor： Max P. McDaniel ,  Carlton E. Ash ,  Kathy S. Clear ,  Eric D. Schwerdtfeger ,  Carlos A. Cruz ,  Jeremy M. Praetorius ,  Youlu Yu

IPC: C08F210/16 ,  C08F4/6592 ,  C08F4/64 ,  C08J5/18

Abstract: Catalyst compositions containing a metallocene compound, a solid activator, and a co-catalyst, in which the solid activator or the supported metallocene catalyst has a d50 average particle size of 15 to 50 μm and a particle size distribution of 0.5 to 1.5, can be contacted with an olefin in a loop slurry reactor to produce an olefin polymer. A representative ethylene-based polymer produced using the catalyst composition has excellent dart impact strength and low gels, and can be characterized by a HLMI from 4 to 10 g/10 min, a density from 0.944 to 0.955 g/cm3, a higher molecular weight component with a Mn from 280,000 to 440,000 g/mol, and a lower molecular weight component with a Mw from 30,000 to 45,000 g/mol and a ratio of Mz/Mw ranging from 2.3 to 3.4.

公开(公告)号：US11124586B1

公开(公告)日：2021-09-21

申请号：US17092394

申请日：2020-11-09

Applicant: Chevron Phillips Chemical Company LP

Inventor： Max P. McDaniel ,  Carlton E. Ash ,  Kathy S. Clear ,  Eric D. Schwerdtfeger ,  Carlos A. Cruz ,  Jeremy M. Praetorius ,  Youlu Yu

IPC: C08F10/02 ,  C08F110/02 ,  C08F210/02 ,  C08F210/16 ,  C08J5/18

Abstract: Catalyst compositions containing a metallocene compound, a solid activator, and a co-catalyst, in which the solid activator or the supported metallocene catalyst has a d50 average particle size of 15 to 50 μm and a particle size distribution of 0.5 to 1.5, can be contacted with an olefin in a loop slurry reactor to produce an olefin polymer. A representative ethylene-based polymer produced using the catalyst composition has excellent dart impact strength and low gels, and can be characterized by a HLMI from 4 to 10 g/10 min, a density from 0.944 to 0.955 g/cm3, a higher molecular weight component with a Mn from 280,000 to 440,000 g/mol, and a lower molecular weight component with a Mw from 30,000 to 45,000 g/mol and a ratio of Mz/Mw ranging from 2.3 to 3.4.

公开(公告)号：US10544236B2

公开(公告)日：2020-01-28

申请号：US16377358

申请日：2019-04-08

Applicant: Chevron Phillips Chemical Company LP

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

IPC: C08F4/6592 ,  C08F4/653 ,  C08F210/16 ,  C08F4/6192 ,  C08F4/64 ,  C08F10/02 ,  C08L23/08 ,  C08F4/659 ,  C08J5/18

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.