公开(公告)号：US20210253835A1

公开(公告)日：2021-08-19

申请号：US17237119

申请日：2021-04-22

Applicant: Chevron Phillips Chemical Company LP

Inventor： Chung Ching Tso ,  Errun Ding ,  Randall S. Muninger ,  John T. Blagg ,  Yongwoo Inn ,  Max P. McDaniel ,  Ashish M. Sukhadia ,  Sarah Eppinger

IPC: C08L23/06 ,  C08F4/6592 ,  C08F210/16 ,  C08L23/16

Abstract: Ethylene polymers having a density from 0.908 to 0.925 g/cm3, a melt index from 0.5 to 3 g/10 min, a ratio of Mw/Mn from 2 to 4, a ratio of Mz/Mw from 1.6 to 2.3, a CY-a parameter from 0.45 to 0.6, and an ATREF profile characterized by a single peak at a peak ATREF temperature from 76 to 88° C., and by less than 4.5 wt. % of the polymer eluting above a temperature of 91° C. These ethylene polymers can be used to produce various articles of manufacture, such as blown and cast films with a beneficial combination of high tear resistance and low haze.

公开(公告)号：US11014997B2

公开(公告)日：2021-05-25

申请号：US16413676

申请日：2019-05-16

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

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：US20200308380A1

公开(公告)日：2020-10-01

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

IPC: C08L23/06 ,  C08L23/08 ,  B29C48/00 ,  C08J5/18 ,  B29C48/08

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.

公开(公告)号：US20200308378A1

公开(公告)日：2020-10-01

申请号：US16363221

申请日：2019-03-25

Applicant: Chevron Phillips Chemical Company LP

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

IPC: C08L23/06 ,  C08L23/08 ,  C08J5/18 ,  B29C48/00 ,  B29C48/08

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.

公开(公告)号：US20200157260A1

公开(公告)日：2020-05-21

申请号：US16774061

申请日：2020-01-28

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.

公开(公告)号：US10590213B2

公开(公告)日：2020-03-17

申请号：US15919282

申请日：2018-03-13

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 ,  F16L9/12 ,  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.

公开(公告)号：US10544273B2

公开(公告)日：2020-01-28

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: B32B7/02 ,  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：US20190382516A1

公开(公告)日：2019-12-19

申请号：US16545039

申请日：2019-08-20

Applicant: Chevron Phillips Chemical Company LP

Inventor： Mark L. Hlavinka ,  Chung Ching Tso ,  Yongwoo Inn ,  Deloris R. Gagan ,  Randy S. Muninger

IPC: C08F210/16 ,  C08J9/228 ,  C08L23/08

Abstract: Disclosed herein are ethylene-based polymers generally characterized by a Mw ranging from 70,000 to 200,000 g/mol, a ratio of Mz/Mw ranging from 1.8 to 20, an IB parameter ranging from 0.92 to 1.05, and an ATREF profile characterized by one large peak. These polymers have the dart impact, tear strength, and optical properties of a metallocene-catalyzed LLDPE, but with improved processability, melt strength, and bubble stability, and can be used in blown film and other end-use applications.

公开(公告)号：US20190284315A1

公开(公告)日：2019-09-19

申请号：US15919282

申请日：2018-03-13

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

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.

公开(公告)号：US20190100606A1

公开(公告)日：2019-04-04

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: C08F4/6192 ,  C08F4/64 ,  C08F10/02 ,  C08F210/16

CPC classification number: C08F4/6192 ,  C08F4/64 ,  C08F4/65904 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/6592 ,  C08F4/65927 ,  C08F10/02 ,  C08F210/16 ,  C08F2410/01 ,  C08F2420/04 ,  C08F2500/01 ,  C08J5/18 ,  C08J2323/08 ,  C08L23/0815 ,  C08L2207/068 ,  C08F210/14 ,  C08F2500/04 ,  C08F2500/08 ,  C08F2500/10 ,  C08F2500/12 ,  C08F2500/17 ,  C08F2500/26

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.