Patents by Inventor Gangwei Sun

Gangwei Sun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10654997
    Abstract: Buffer tubes made from a composition comprising: (A) polypropylene, (B) high density polyethylene (HDPE), (C) propylene-ethylene copolymer (PE copolymer), (D) olefin block composite, and (E) optionally, one or more of a nucleating agent, filler and additive, exhibit reduced stress whitening as compared to buffer tubes made from conventional polypropylene compositions.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: May 19, 2020
    Assignee: Dow Global Technologies LLC
    Inventors: Mohamed Esseghir, Gangwei Sun, Yonghua Gong
  • Publication number: 20200148868
    Abstract: A process of foaming a polyolefin, e.g., polyethylene, composition using as a nucleator a combination of (A) azodicarbonamide, and (B) a mixture of (1) a first component consisting of at least one of citric acid and an alkali metal citrate, and (2) a second component consisting of at least one of an alkali metal citrate, a di-alkali metal hydrogen citrate, an alkali metal dihydrogen citrate and an alkali metal bicarbonate, with the proviso that the mixture is not solely composed of alkali metal citrate.
    Type: Application
    Filed: January 14, 2020
    Publication date: May 14, 2020
    Inventors: Gangwei Sun, Mohamed Esseghir, Xianmin Xu, Chester J. Kmiec
  • Publication number: 20200123356
    Abstract: A polyolefin composition is foamed by a process in which a nucleator is used, and the nucleator comprises 80% or more of unagglomerated fluororesin particles and/or agglomerates of fluororesin particles in which both the unagglomerated particles and the agglomerates are less than 1 ?m in size.
    Type: Application
    Filed: December 18, 2019
    Publication date: April 23, 2020
    Inventors: Gangwei Sun, Mohamed Esseghir, Chester J. Kmiec, Lei Ying, Yabin Sun, Xianmin Xu
  • Patent number: 10577489
    Abstract: A process of foaming a polyolefin, e.g., polyethylene, composition using as a nucleator a combination of (A) azodicarbonamide, and (B) a mixture of (1) a first component consisting of at least one of citric acid and an alkali metal citrate, and (2) a second component consisting of at least one of an alkali metal citrate, a di-alkali metal hydrogen citrate, an alkali metal dihydrogen citrate and an alkali metal bicarbonate, with the proviso that the mixture is not solely composed of alkali metal citrate.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: March 3, 2020
    Assignee: Dow Global Technologies LLC
    Inventors: Gangwei Sun, Mohamed Esseghir, Xianmin Xu, Chester J. Kmiec
  • Patent number: 10550249
    Abstract: A polyolefin composition is foamed by a process in which a nucleator is used, and the nucleator comprises 80% or more of unagglomerated fluororesin particles and/or agglomerates of fluororesin particles in which both the unagglomerated particles and the agglomerates are less than 1 ?m in size.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: February 4, 2020
    Assignee: Dow Global Technologies LLC
    Inventors: Gangwei Sun, Mohamed Esseghir, Chester J. Kmiec, Lei Ying, Yabin Sun, XianMin Xu
  • Patent number: 10502913
    Abstract: Polymeric compositions comprising a polybutylene terephthalate, an ethylene-based polymer, and a maleated ethylene-based polymer. Optical cable components fabricated from the polymeric composition. Optionally, the polymeric composition can further comprise one or more additives, such as a filler. The optical fiber cable components can be selected from buffer tubes, core tubes, and slotted core tubes, among others.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: December 10, 2019
    Assignee: Dow Global Technologies LLC
    Inventors: William J. Harris, Mohamed Esseghir, Gangwei Sun
  • Publication number: 20190352482
    Abstract: The present disclosure provides a foamable composition containing (A) a high density polyethylene (HDPE); (B) a low density polyethylene (LDPE); (C) a peroxide-modified HDPE; and (D) a nucleator. The present disclosure also provides a process for making a foam composition. Additionally, the present disclosure provides a foam formed from a foamable composition, and a cable with an insulation layer containing the foam.
    Type: Application
    Filed: February 7, 2017
    Publication date: November 21, 2019
    Inventors: Jiawen Xiong, Gangwei Sun, Mohamed Esseghir, Hongyu Chen, Jeffrey M. Cogen, Yi Zhang
  • Publication number: 20190345304
    Abstract: The process of foaming a polyolefin, e.g., polyethylene, composition using as a nucleator a combination an azodicarbonamide (ADCA) and a fluororesin at a ADCA:fluororesin weight ratio of 60:40 to 20:80. The synergic effect between these two nucleating agents results in a higher nuclei density and a foamed product with a smaller cell size as compared to processes using and products produced by the use of neat PTFE or neat ADCA alone as the nucleating agent.
    Type: Application
    Filed: July 26, 2019
    Publication date: November 14, 2019
    Inventors: Gangwei SUN, Mohamed ESSEGHIR, Chester J. KMIEC
  • Patent number: 10414892
    Abstract: The process of foaming a polyolefin, e.g., polyethylene, composition using as a nucleator a combination an azodicarbonamide (ADCA) and a fluororesin at a ADCA: fluororesin weight ratio of 60:40 to 20:80. The synergic effect between these two nucleating agents results in a higher nuclei density and a foamed product with a smaller cell size as compared to processes using and products produced by the use of neat PTFE or neat ADCA alone as the nucleating agent.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: September 17, 2019
    Assignee: Dow Global Technologies LLC
    Inventors: Gangwei Sun, Mohamed Esseghir, Chester J. Kmiec
  • Publication number: 20190203011
    Abstract: A foamable composition comprises in weight percent based on the weight of the composition: (A) 45 to 95 wt % HDPE, (B) 4 to 54 wt % LDPE, and (C) 0.01 to 2 wt % of a nucleating agent comprising in weight percent based on the weight of the nucleating agent: (1) 20 to 80 wt % of fluororesin, e.g., PTFE, and (2) 80 to 20 wt % of expandable polymeric microspheres.
    Type: Application
    Filed: September 13, 2016
    Publication date: July 4, 2019
    Inventors: Gangwei Sun, Mohamed Esseghir, Yonghua Gong
  • Patent number: 10308782
    Abstract: In one aspect there is provided a foam comprising: a polymeric matrix comprising polyethylene grafted polymerized siloxane, and a plurality of cells formed in the polymeric matrix and containing a blowing agent comprising carbon dioxide. In another aspect there is provided a method of making a foam comprising: grafting polymerized siloxane to polyethylene to form a grafted intermediate; molding the grafted intermediate to form a molded intermediate; and foaming the molded intermediate using high-pressure CO2 to form the foam, wherein the foam has a porosity greater than 75%.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: June 4, 2019
    Assignee: Dow Global Technologies LLC
    Inventors: Zhe Du, Cheng Chen, David Hong Fei Guo, Dachao Li, Gangwei Sun, Jianxin Zhang
  • Publication number: 20190092918
    Abstract: The process of foaming a polyolefin composition using as a nucleator a combination of a fluororesin and a boron nitride at a fluororesin-to-boron nitride weight ratio of less than 4:1. The synergistic effect between these two nucleating agents results in a higher nuclei density and a foamed product with a smaller average cell size as compared to processes using and products produced by the use of neat PTFE or neat boron nitride alone as the nucleating agent.
    Type: Application
    Filed: March 28, 2016
    Publication date: March 28, 2019
    Inventors: Gangwei Sun, Mohamed Esseghir
  • Publication number: 20190048177
    Abstract: Buffer tubes made from a composition comprising: (A) polypropylene, (B) high density polyethylene (HDPE), (C) propylene-ethylene copolymer (PE copolymer), (D) olefin block composite, and (E) optionally, one or more of a nucleating agent, filler and additive, exhibit reduced stress whitening as compared to buffer tubes made from conventional polypropylene compositions.
    Type: Application
    Filed: March 25, 2016
    Publication date: February 14, 2019
    Inventors: Mohamed Esseghir, Gangwei Sun, Yonghua Gong
  • Publication number: 20190023895
    Abstract: Polymeric compositions comprising a polybutylene terephthalate, an ethylene-based polymer, and a maleated ethylene-based polymer. Optical cable components fabricated from the polymeric composition. Optionally, the polymeric composition can further comprise one or more additives, such as a filler. The optical fiber cable components can be selected from buffer tubes, core tubes, and slotted core tubes, among others.
    Type: Application
    Filed: March 7, 2016
    Publication date: January 24, 2019
    Applicant: Dow Global Technologies LLC
    Inventors: William J. Harris, Mohamed Esseghir, Gangwei Sun
  • Publication number: 20180346676
    Abstract: A process for making a foam composition, the process comprising the steps of: (A) Forming a mixture comprising high density polyethylene (HDPE), low density polyethylene (LDPE) and a peroxide; and (B) Contacting the mixture of (A) with carbon dioxide (CO2) at a pressure greater than or equal to 15 megaPascals (MPa). In one embodiment the peroxide is DTAP. In one embodiment the mixture of (A) further comprises a CO2-philic compound such as PDMS.
    Type: Application
    Filed: December 3, 2015
    Publication date: December 6, 2018
    Inventors: Cheng Chen, Gangwei Sun, Mohamed Esseghir, Jeffrey M. Cogen, Zhe Du, Jianxin Zhang
  • Publication number: 20180105684
    Abstract: A process of foaming a polyolefin, e.g., polyethylene, composition using as a nucleator a combination of (A) azodicarbonamide, and (B) a mixture of (1) a first component consisting of at least one of citric acid and an alkali metal citrate, and (2) a second component consisting of at least one of an alkali metal citrate, a di-alkali metal hydrogen citrate, an alkali metal dihydrogen citrate and an alkali metal bicarbonate, with the proviso that the mixture is not solely composed of alkali metal citrate.
    Type: Application
    Filed: May 8, 2015
    Publication date: April 19, 2018
    Inventors: Gangwei Sun, Mohamed Esseghir, Xianmin Xu, Chester J. Kmiec
  • Publication number: 20170327676
    Abstract: A polyolefin composition is foamed by a process in which a nucleator is used, and the nucleator comprises 80% or more of unagglomerated fluororesin particles and/or agglomerates of fluororesin particles in which both the unagglomerated particles and the agglomerates are less than 1 ?m in size.
    Type: Application
    Filed: November 28, 2014
    Publication date: November 16, 2017
    Inventors: Gangwei Sun, Mohamed Esseghir, Chester J. Kmiec, Lei Ying, Yabin Sun, XianMin Xu
  • Publication number: 20170275431
    Abstract: The process of foaming a polyolefin, e.g., polyethylene, composition using as a nucleator a combination an azodicarbonamide (ADCA) and a fluororesin at a ADCA: fluororesin weight ratio of 60:40 to 20:80. The synergic effect between these two nucleating agents results in a higher nuclei density and a foamed product with a smaller cell size as compared to processes using and products produced by the use of neat PTFE or neat ADCA alone as the nucleating agent.
    Type: Application
    Filed: November 28, 2014
    Publication date: September 28, 2017
    Inventors: Gangwei SUN, Mohamed ESSEGHIR, Chester J. KMIEC
  • Publication number: 20170267828
    Abstract: The process of foaming a polyolefin, e.g., polyethylene, composition using as a nucleator a combination of (A) a fluororesin, and (B) a mixture of (1) a first component consisting of at least one of citric acid and an alkali metal citrate, and (2) a second component consisting of at least one of an alkali metal citrate, a di-alkali metal hydrogen citrate, an alkali metal dihydrogen citrate and an alkali metal bicarbonate with the proviso that if the first component of the mixture is an alkali metal citrate, then the second component of the mixture is not an alkali metal citrate.
    Type: Application
    Filed: November 28, 2014
    Publication date: September 21, 2017
    Inventors: Gangwei Sun, Mohamed Esseghir, XianMin Xu, Chester J. Kmiec
  • Publication number: 20170204239
    Abstract: In one aspect there is provided a foam comprising: a polymeric matrix comprising polyethylene grafted polymerized siloxane, and a plurality of cells formed in the polymeric matrix and containing a blowing agent comprising carbon dioxide. In another aspect there is provided a method of making a foam comprising: grafting polymerized siloxane to polyethylene to form a grafted intermediate; molding the grafted intermediate to form a molded intermediate; and foaming the molded intermediate using high-pressure CO2 to form the foam, wherein the foam has a porosity greater than 75%.
    Type: Application
    Filed: August 15, 2014
    Publication date: July 20, 2017
    Inventors: Zhe Du, Cheng Chen, Hanfei Guo, Dachao Li, Gangwei Sun, Jianxin Zhang