公开(公告)号：US20250101148A1

公开(公告)日：2025-03-27

申请号：US18887156

申请日：2024-09-17

Applicant: Chevron Phillips Chemical Company LP

Inventor： Vivek Rohatgi ,  David G. Hukill ,  Joseph A. Curren ,  Jeffrey S. Fodor ,  Daniel G. Hert ,  Richard Brody Peterson

IPC: C08F10/02 ,  C08L23/06

Abstract: Ethylene-based polymers having a melt index from 0.15 to 0.5 g/10 min, a high load melt index from 15 to 50 g/10 min, a density from 0.94 to 0.96 g/cm3, and a higher molecular weight component and a lower molecular weight component are disclosed. The higher molecular weight component has a HMW HL275 from 3 to 8 g/10 min and a HMW density from 0.92 to 0.94 g/cm3. These polymers can have one or more of an environmental stress crack resistance (ESCR) of at least 1,000 hr, a yield strength of 3,000 to 5,000 psi, a viscosity at 100 sec−1 of 1,000 to 1,800 Pa-sec, and/or a notched constant ligament stress (NCLS) of 80 to 1,000 hr.

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.

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：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：US09828451B2

公开(公告)日：2017-11-28

申请号：US14522991

申请日：2014-10-24

Applicant: Chevron Phillips Chemical Company LP

Inventor： Vivek Rohatgi ,  Yongwoo Inn ,  Ashish M. Sukhadia ,  Qing Yang ,  Paul J. DesLauriers

IPC: C08F210/16 ,  C08L23/08 ,  C08F4/65 ,  C08F4/659 ,  C08F4/6592

CPC classification number: C08F210/16 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/65925 ,  C08F4/65927 ,  C08L23/0815 ,  C08L2203/18 ,  C08L2205/025 ,  C08L2312/00 ,  C08F4/65904 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/17

Abstract: A crosslinked metallocene-catalyzed polyethylene copolymer having a higher molecular weight (HMW) component and lower molecular weight (LMW) component wherein the HMW component is present in an amount of from about 10 wt. % to about 30 wt. % and wherein the LMW component is present in an amount of from about 70 wt. % to about 90 wt. %.

公开(公告)号：US20170066857A1

公开(公告)日：2017-03-09

申请号：US14848405

申请日：2015-09-09

Applicant: Chevron Phillips Chemical Company LP

Inventor： Jeff F. Greco ,  Qing Yang ,  Vivek Rohatgi ,  Mark L. Hlavinka ,  Jim B. Askew

IPC: C08F210/14

CPC classification number: C08F210/14 ,  C08F4/65904 ,  C08F4/65916 ,  C08F210/02 ,  C08F210/16 ,  C08F4/65927 ,  C08F4/65925 ,  C08F210/10 ,  C08F2500/14 ,  C08F2500/05

Abstract: Methods for controlling the die swell of an olefin polymer produced using a dual catalyst system are disclosed. The die swell of the olefin polymer can be increased or decreased as a function of the catalyst weight ratio and the reactant molar ratio used during the olefin polymerization process.

Abstract translation: 公开了使用双重催化剂体系制备的烯烃聚合物的模头膨胀的控制方法。 烯烃聚合物的模头膨胀可以随着催化剂重量比和在烯烃聚合过程中使用的反应物摩尔比的增加而降低。

公开(公告)号：US09493589B1

公开(公告)日：2016-11-15

申请号：US14848395

申请日：2015-09-09

Applicant: Chevron Phillips Chemical Company LP

Inventor： Jeff F Greco ,  Qing Yang ,  Vivek Rohatgi ,  Mark L. Hlavinka ,  Jim B Askew

IPC: C08F210/16 ,  C08F210/14 ,  C08F210/08

CPC classification number: C08F210/16 ,  B29C49/0005 ,  B29C49/04 ,  B29K2023/06 ,  B29K2995/0089 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/65925 ,  C08F4/65927 ,  C08F2500/05 ,  C08F2500/12 ,  C08F2500/13 ,  C08L23/0815 ,  C08L2203/10 ,  C08L2205/025 ,  C08L2207/062 ,  C08L2314/06 ,  C08F4/65904 ,  C08F210/14 ,  C08F2500/17

Abstract: Disclosed herein are ethylene-based polymers generally characterized by a density greater than 0.954 g/cm3, high load melt index ranging from 10 to 45 g/10 min, a ratio of high load melt index to melt index ranging from 175 to 600, a rheological slope parameter ranging from 0.15 to 0.30, and an ESCR in 10% igepal exceeding 800 hours. These polymers have the beneficial processability and die swell features of chromium-based resins, but with improved stiffness and stress crack resistance, and can be used in blow molding and other end-use applications.

Abstract translation: 本文公开的是基于乙烯的聚合物，其通常特征在于密度大于0.954g / cm 3，高负荷熔体指数为10至45g / 10min，高负载熔体指数与熔体指数的比值为175至600，a 流变斜率参数为0.15〜0.30，ESCR为10％以上，超过800小时。 这些聚合物具有铬基树脂的有益的可加工性和模具膨胀特性，但具有改善的刚度和抗应力开裂性，并且可用于吹塑和其它终端应用。