公开(公告)号：US11008412B2

公开(公告)日：2021-05-18

申请号：US16331658

申请日：2017-09-21

Applicant: Dow Global Technologies LLC

Inventor： Linfeng Chen ,  Mehmet Demirors

IPC: C08F210/16 ,  C08F210/02 ,  C08F210/14 ,  C08F4/654 ,  C08F4/659 ,  C08F4/64

Abstract: A method of polymerizing an olefin using a combination of a Ziegler-Natta catalyst and an unsupported molecular catalyst in a same reactor at the same time to give a polyolefin product, and the polyolefin product made by the method. Also, methods of preparing the combination of (pro)catalysts.

公开(公告)号：US20190241686A1

公开(公告)日：2019-08-08

申请号：US16331644

申请日：2017-09-21

Applicant: Dow Global Technologies LLC

Inventor： Linfeng Chen ,  Mehmet Demirors

IPC: C08F210/16

CPC classification number: C08F210/16 ,  C08F10/00 ,  C08F2410/04 ,  C08F4/6545 ,  C08F4/64193 ,  C08F210/14 ,  C08F2500/05

Abstract: A modified Ziegler-Natta procatalyst that is a product mixture of modifying an initial Ziegler-Natta procatalyst with a molecular (pro)catalyst, and optionally an activator, the modifying occurring before activating the modified Ziegler-Natta procatalyst with an activator and before contacting the modified Ziegler-Natta procatalyst with a polymerizable olefin. Also, a modified catalyst system prepared therefrom, methods of preparing the modified Ziegler-Natta procatalyst and the modified catalyst system, a method of polymerizing an olefin using the modified catalyst system, and a polyolefin product made thereby.

公开(公告)号：US20130150234A1

公开(公告)日：2013-06-13

申请号：US13760279

申请日：2013-02-06

Applicant: Dow Global Technologies LLC

Inventor： Linfeng Chen ,  Tak W. Leung ,  Tao Tao

IPC: C08F4/649

CPC classification number: C08F4/6494 ,  C08F10/00 ,  C08F110/06 ,  C08F4/651 ,  C08F2500/12 ,  C08F2500/04

Abstract: Disclosed herein are procatalyst compositions, catalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present procatalyst compositions contain a halo-malonate and a 2-fluoro-malonate in particular. The present catalyst compositions improve catalyst selectivity, improve catalyst activity, and also improve hydrogen response during polymerization. Propylene-based polymer produced from the present catalyst composition has a melt flow rate greater than 50 g/10 min.

Abstract translation: 本文公开的是前催化剂组合物，催化剂组合物和聚合物，即由其制备的基于丙烯的聚合物。 本发明的前催化剂组合物特别包含卤代丙二酸酯和2-氟 - 丙二酸酯。 本催化剂组合物改善催化剂选择性，改善催化剂活性，并且还改善聚合期间的氢响应。 由本催化剂组合物制备的基于丙烯的聚合物的熔体流动速率大于50g / 10min。

公开(公告)号：US20240400733A1

公开(公告)日：2024-12-05

申请号：US18699633

申请日：2022-10-10

Applicant: Dow Global Technologies LLC

Inventor： Bo Liu ,  Nitin K. Borse ,  Lalit Darunte ,  David M. Pearson ,  Mridula Kapur ,  Linfeng Chen ,  Yongchao Zheng ,  Andrew T. Heitsch

IPC: C08F210/16 ,  C08F2/34 ,  C08F4/642 ,  C08F4/655 ,  C08F4/659 ,  C08F4/6592 ,  C08L23/08

Abstract: Embodiments are directed towards ethylene/1-hexene copolymers made from ethylene and hexene, wherein the ethyl-CA ene/1-hexene copolymer has a density from 0.850 to 0.940 g/cm3, a melt index (I21) from 0.1 to 50 dg/min, a melt index (I21/I2) ratio less than or equal to 18.5, a Mw(Abs)/Mn(Abs) from 2.0 to 3.5, a Mz(Abs)/Mw(Abs) from 1.7 to 4.5, and a cumulative detector fraction (CDFLS) at a molecular weight of ≥1,000,000 g/mol of greater than 100*(0.0536−I21*0.00224)%.

公开(公告)号：US20220235155A1

公开(公告)日：2022-07-28

申请号：US17721082

申请日：2022-04-14

Applicant: Dow Global Technologies LLC

Inventor： Linfeng Chen ,  David M. Pearson ,  Michael W. Tilston ,  Mridula Kapur ,  Robert N. Reib ,  Stephanie M. Whited

IPC: C08F4/659 ,  C08F2/01 ,  C08F2/34 ,  C08F4/6592 ,  C08F210/02

Abstract: A hafnocene-titanocene catalyst system comprising a hafnocene catalyst and a titanocene catalyst; polyolefins; methods of making and using same; and articles containing same.

公开(公告)号：US20210205786A1

公开(公告)日：2021-07-08

申请号：US17057774

申请日：2019-05-29

Applicant: Dow Global Technologies LLC

Inventor： Linfeng Chen ,  Kurt F. Hirsekorn ,  Mehmet Demirors

IPC: B01J21/06 ,  B01J35/10 ,  B01J20/04 ,  B01J31/14 ,  C08F2/06 ,  C08F4/657 ,  C08F4/02

Abstract: A procatalyst including a preformed magnesium chloride catalyst support having a surface area of greater than or equal to 100 m2/g, a titanium containing component, a chlorinating agent, and a hydrocarbon soluble transition metal compound having an oxidation state of greater than or equal to 5+. The hydrocarbon soluble transition metal compound having an oxidation state of greater than or equal to 5+ is not vanadium.

公开(公告)号：US20190256618A1

公开(公告)日：2019-08-22

申请号：US16314263

申请日：2017-06-29

Applicant: Dow Global Technologies LLC

Inventor： Linfeng Chen ,  Teresa P. Karjaia ,  Mehmet Demirors ,  Douglas S. Ginger ,  Marc A. Springs

IPC: C08F4/654 ,  C08F4/651 ,  C08F4/659 ,  C08F4/649 ,  C08F210/16

Abstract: The present disclosure relates to novel procatalyst compositions including a titanium moiety, a magnesium halide support, a hydrocarbon solution in which the magnesium halide support is formed, and an electron donor modifier described herein. The present disclosure further relates to a one-pot process for preparing the novel procatalyst compositions, as well as use of the novel procatalyst compositions in solution processes for polymerization of ethylene and at least one addition polymerizable monomer to form a polymer composition.

公开(公告)号：US20190241687A1

公开(公告)日：2019-08-08

申请号：US16331658

申请日：2017-09-21

Applicant: Dow Global Technologies LLC

Inventor： Linfeng Chen ,  Mehmet Demirors

IPC: C08F210/16 ,  C08F210/02 ,  C08F210/14 ,  C08F4/654 ,  C08F4/64 ,  C08F4/659

CPC classification number: C08F210/16 ,  C08F4/64193 ,  C08F4/6545 ,  C08F4/65912 ,  C08F4/65916 ,  C08F210/02 ,  C08F210/14 ,  C08F2410/04 ,  C08F2500/02 ,  C08F2500/05 ,  Y02P20/52

Abstract: A method of polymerizing an olefin using a combination of a Ziegler-Natta catalyst and an unsupported molecular catalyst in a same reactor at the same time to give a polyolefin product, and the polyolefin product made by the method. Also, methods of preparing the combination of (pro)catalysts.

公开(公告)号：US09988475B2

公开(公告)日：2018-06-05

申请号：US14902128

申请日：2014-08-18

Applicant: Dow Global Technologies LLC

Inventor： Linfeng Chen ,  Robert J. Jorgensen ,  Stephanie M. Whited

IPC: C08F2/38 ,  C08F4/12 ,  C08F26/00 ,  C08F210/16

CPC classification number: C08F210/16 ,  C08F2/40 ,  C08F2/38 ,  C08F4/6494 ,  C08F4/6543 ,  C08F4/025 ,  C08F210/14 ,  C08F2/34 ,  C08F2/14

Abstract: The instant invention provides a method for polymerizing one or more ethylene-based polymers. The method for polymerizing one or more ethylene-based polymers according to the present invention comprises the following steps: (1) selecting ethylene and optionally one or more alpha-olefin comonomers; (2) selecting one or more catalyst systems comprising one or more procatalysts comprising Ti, one or more cocatalysts comprising Al, and one or more self-limiting agents (SLA); wherein the ratio of SLA to Ti is from 5:1 to 40:1 and the ratio of Al to SLA is from 2:1 to 40:1; (3) polymerizing said ethylene and optionally one or more alpha-olefin comonomers in the presence of said one or more catalyst systems via a slurry polymerization process or gas-phase polymerization process in one or more reactors; (4) thereby producing one or more ethylene; wherein said catalyst system has a loss of least 85% of catalyst productivity when the temperature is increased from 85 to 115 C.

公开(公告)号：US20140163184A1

公开(公告)日：2014-06-12

申请号：US14075079

申请日：2013-11-08

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Linfeng Chen ,  Tak W. Leung ,  Tao Tao ,  Kuanqiang Gao ,  James X. Shu

IPC: C08F110/06

CPC classification number: C08F110/06 ,  C08F10/06 ,  C08F4/651 ,  C08F2500/12 ,  C08F2500/18 ,  C08F2500/04 ,  C08F4/654

Abstract: Disclosed are procatalyst compositions having an internal electron donor which includes a substituted amide ester and optionally an electron donor component. Ziegler-Natta catalyst compositions containing the present procatalyst compositions exhibit improved catalyst activity and/or improved catalyst selectivity and produce propylene-based olefins with broad molecular weight distribution.

Abstract translation: 公开了具有内电子给体的前催化剂组合物，其包括取代的酰胺酯和任选的电子给体组分。 包含本发明的前催化剂组合物的齐格勒 - 纳塔催化剂组合物表现出改进的催化剂活性和/或改进的催化剂选择性并产生具有宽分子量分布的丙烯基烯烃。