Patents by Inventor Weijun Zhou

Weijun Zhou 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).

  • Publication number: 20250043058
    Abstract: Polyol compositions that contain imide groups are prepared by producing imide compounds from trimellitic anhydride and an aromatic aminoacid or an aromatic diamine, then esterifying the imide compounds with one or more polyols that have hydroxyl equivalent weights of 30 to 500. Aromatic carboxylic acid derivatives may be present during the esterification step to produce polyol compositions that contain species that have imide groups, and other species that do not have imide groups. The polyol compositions are useful in making isocyanate-based polymers, in particular polyurethane and/or polyurethane-isocyanuranate foams. The presence of the imide groups in the isocyanate-based polymers imparts fire retardant properties.
    Type: Application
    Filed: December 13, 2022
    Publication date: February 6, 2025
    Inventors: Weijun Zhou, William J. Harris
  • Patent number: 12202928
    Abstract: Embodiments of the present disclosure are directed towards isocyanate reactive compositions that include a polyol and tris(4-hydroxyphenyl)methane alkoxylate.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: January 21, 2025
    Assignee: Dow Global Technologies LLC
    Inventors: Christopher S. Letko, Weijun Zhou, Thomas P. Willumstad
  • Patent number: 12185726
    Abstract: The patent discloses a method for efficiently collecting and purifying Orobanche cumana (O. cumana) germination stimulants using aeroponic system and solid-phase extraction (SPE), including the following steps: (1) sunflower seeds germination, then planting sunflower seedlings in aeroponic device, and cultivating the sunflower seedlings in the aeroponic system; at the aeroponic stage, phosphorus-containing aeroponic nutrient solution is first used to cultivate the sunflower seedlings for 20 to 25 days, and phosphorus-free aeroponic nutrient solution is then used instead to subject the sunflower seedlings to starvation cultivation for 5 to 7 days; and (2) passing all nutrient solutions in the aeroponic device through an SPE cartridge for SPE to extract O. cumana germination stimulants. The obtained O. cumana germination stimulants are diversified, and have high concentration and purity.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: January 7, 2025
    Inventors: Weijun Zhou, Luyang Hu, Chong Yang, Ling Xu, Na Zhang, Jiansu Wang, Jinwen Zhu, Quanjiang Bai, Xiaopeng Yun
  • Patent number: 12110306
    Abstract: Embodiments of the present disclosure are directed towards ?-hydroxyphosphonate functionalized polyols and isocyanate reactive compositions that include the ?-hydroxyphosphonate functionalized polyol and a base polyol.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: October 8, 2024
    Assignee: Dow Global Technologies LLC
    Inventors: Christopher S. Letko, Ravi B. Shankar, Harshad M. Shah, Weijun Zhou
  • Patent number: 12110361
    Abstract: Embodiments of the present disclosure are directed towards hybrid foam formulations that include: an isocyanate-reactive composition, and a high-functionality crosslinker; an azo type radical initiator; and an isocyanate.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: October 8, 2024
    Assignee: Dow Global Technologies LLC
    Inventors: Weijun Zhou, William A. Koonce, William J. Harris, Yonghui Zhang
  • Publication number: 20240209141
    Abstract: A liquid aromatic polyester polyol composition comprising a reaction product of at least one aromatic polycarboxylic acid and/or anhydride with at least one polyhydric alcohol comprising a monocyclic ring structure; a process for preparing the liquid aromatic polyester polyol composition; an isocyanate-reactive composition and a foam-forming composition comprising the liquid aromatic polyester polyol.
    Type: Application
    Filed: June 29, 2021
    Publication date: June 27, 2024
    Inventors: Weijun Zhou, William J. Harris
  • Publication number: 20230141110
    Abstract: A method for preparing polyisocyanurate and polyurethane foams by the use of a liquid siloxane nucleating additive, and a foam-forming composition for preparing foams with improved thermal insulation performance, comprising an isocyanate component, an isocyanate-reactive component, a blowing agent, and a liquid siloxane nucleating additive.
    Type: Application
    Filed: June 7, 2021
    Publication date: May 11, 2023
    Inventors: Weijun Zhou, Thomas Mosciatti
  • Publication number: 20230139422
    Abstract: Embodiments relate to a liquid aromatic polyester polyol composition for preparing a polyurethane foam product including at least one polyalicyclic structure, wherein the aromatic polyester polyol composition is a clear liquid at room temperature, the viscosity of the aromatic polyester polyol composition, at room temperature and at a shear rate of 10 sec-1, is no greater than 100 Pa-s; and the OH number of the aromatic polyester polyol composition is in the range of from 100 mg KOH/g to 500 mg KOH/g; and a process for preparing the above liquid aromatic polyester polyol composition; an isocyanate-reactive composition and a foam-forming composition comprising the liquid aromatic polyester polyol.
    Type: Application
    Filed: June 24, 2021
    Publication date: May 4, 2023
    Inventors: Weijun Zhou, William J. Harris
  • Publication number: 20230132681
    Abstract: An isocyanate-reactive composition comprising (i) at least one isocyanate-reactive compound; and (ii) at least one T-shaped siloxane material at a predetermined amount; and a foam-forming composition for producing a polyurethane or polyisocyanurate foam comprising at least one isocyanate component and at least one isocyanate-reactive component; wherein the at least one isocyanate-reactive component is the above isocyanate-reactive composition.
    Type: Application
    Filed: June 7, 2021
    Publication date: May 4, 2023
    Inventors: Weijun Zhou, Thomas Mosciatti
  • Publication number: 20220372287
    Abstract: An isocyanate-reactive composition including: (i) at least one isocyanate-reactive compound; and (ii) a predetermined amount of at least one thixotropic modifier; and a foam-forming composition for producing a polyurethane or polyisocyanurate foam including: (A) at least one isocyanate component; and (B) at least one isocyanate-reactive component; wherein the at least one iso-cyanate-reactive component is the above isocyanate-reactive composition.
    Type: Application
    Filed: January 19, 2021
    Publication date: November 24, 2022
    Inventor: Weijun Zhou
  • Patent number: 11472910
    Abstract: A polyisocyanate component, a polyurethane foaming system, and an article made therefrom, wherein the polyisocyanate component includes (a) a preformed mixture including an aromatic oxazolidone compound that is the reaction product of at least one aromatic epoxide and at least one first polyisocyanate having an average isocyanate functionality of no more than 2.7 and greater than 1.8, in the presence of at least one catalyst, the aromatic oxazolidone compound includes at least one free isocyanate group and at least one aromatic oxazolidone group, the aromatic oxazolidone group includes an aromatic group and an oxazolidone group, and (b) at least one second polyisocyanate has an average isocyanate functionality equal to or greater than 2.7 and less than 6.0. The second polyisocyanate is added to the preformed mixture to form the polyisocyanate component. The polyisocyanate component has a viscosity of no more than 4.0 Pa-sat 25° C.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: October 18, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: Yanli Feng, Weijun Zhou, Luigi Bertucelli, Rajat Duggal, Yibei Gu, Wei Liu, Davide Micheletti
  • Publication number: 20220267510
    Abstract: The present disclosure provides for an isocyanate-reactive composition that can react with an isocyanate compound in a reaction mixture to form a polyurethane-based foam. The isocyanate-reactive composition includes an isocyanate reactive compound and a combustion modifier composition. The isocyanate reactive compound has an isocyanate reactive moiety and an aromatic moiety. The combustion modifier composition includes both phosphorus from a halogen-free flame-retardant compound and a transition metal from a transition metal compound. The combustion modifier composition can have a molar ratio of the transition metal to phosphorus (mole transition metal:mole phosphorous) of 0.05:1 to 5:1.
    Type: Application
    Filed: July 9, 2020
    Publication date: August 25, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Dakai Ren, Luigi Bertucelli, Weijun Zhou, Eddy I. Garcia-Meitin, Yiqun Zhang, William J. Harris
  • Publication number: 20220119427
    Abstract: Embodiments of the present disclosure are directed towards ?-hydroxyphosphonate functionalized polyols and isocyanate reactive compositions that include the ?-hydroxyphosphonate functionalized polyol and a base polyol.
    Type: Application
    Filed: January 29, 2020
    Publication date: April 21, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Christopher S. Letko, Ravi B. Shankar, Harshad M. Shah, Weijun Zhou
  • Publication number: 20220098358
    Abstract: Embodiments of the present disclosure are directed towards isocyanate reactive compositions that include a polyol and tris(4-hydroxyphenyl)methane alkoxylate.
    Type: Application
    Filed: January 30, 2020
    Publication date: March 31, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Christopher S. Letko, Weijun Zhou, Thomas P. Willumstad
  • Publication number: 20220064361
    Abstract: Embodiments of the present disclosure are directed towards hybrid foam formulations that include: an isocyanate-reactive composition, and a high-functionality crosslinker; an azo type radical initiator; and an isocyanate.
    Type: Application
    Filed: December 10, 2019
    Publication date: March 3, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Weijun Zhou, William A. Koonce, William J. Harris, Yonghui Zhang
  • Publication number: 20220007655
    Abstract: The patent discloses a method for efficiently collecting and purifying Orobanche cumana (O. cumana) germination stimulants using aeroponic system and solid-phase extraction (SPE), including the following steps: (1) sunflower seeds germination, then planting sunflower seedlings in aeroponic device, and cultivating the sunflower seedlings in the aeroponic system; at the aeroponic stage, phosphorus-containing aeroponic nutrient solution is first used to cultivate the sunflower seedlings for 20 to 25 days, and phosphorus-free aeroponic nutrient solution is then used instead to subject the sunflower seedlings to starvation cultivation for 5 to 7 days; and (2) passing all nutrient solutions in the aeroponic device through an SPE cartridge for SPE to extract O. cumana germination stimulants. The obtained O. cumana germination stimulants are diversified, and have high concentration and purity.
    Type: Application
    Filed: June 5, 2020
    Publication date: January 13, 2022
    Inventors: Weijun ZHOU, Luyang HU, Chong YANG, Ling XU, Na ZHANG, Jiansu WANG, Jinwen ZHU, Quanjiang BAI, Xiaopeng YUN
  • Publication number: 20210061939
    Abstract: A polyisocyanate component, a polyurethane foaming system, and an article made therefrom, wherein the polyisocyanate component includes (a) a preformed mixture including an aromatic oxazolidone compound that is the reaction product of at least one aromatic epoxide and at least one first polyisocyanate having an average isocyanate functionality of no more than 2.7 and greater than 1.8, in the presence of at least one catalyst, the aromatic oxazolidone compound includes at least one free isocyanate group and at least one aromatic oxazolidone group, the aromatic oxazolidone group includes an aromatic group and an oxazolidone group, and (b) at least one second polyisocyanate has an average isocyanate functionality equal to or greater than 2.7 and less than 6.0. The second polyisocyanate is added to the preformed mixture to form the polyisocyanate component. The polyisocyanate component has a viscosity of no more than 4.0 Pa-sat 25° C.
    Type: Application
    Filed: May 18, 2018
    Publication date: March 4, 2021
    Applicant: Dow Global Technologies LLC
    Inventors: Yanli Feng, Weijun Zhou, Luigi Bertucelli, Rajat Duggal, Yibei Gu, Wei Liu, Davide Micheletti
  • Patent number: 10399893
    Abstract: A coated glass substrate. The coated glass substrate comprises a glass sheet having a thickness from 0.1 to 0.7 mm and coated on a first side with a first optical layer having a positive photo-elastic constant and coated on a second side with a second optical layer having a negative photo-elastic constant.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: September 3, 2019
    Assignees: Rohm and Haas Electronic Materials LLC, Rohm and Haas Company, Dow Global Technologies LLC
    Inventors: Shih-Wei Chang, Lanfang Li, Kathleen M. O'Connell, Weijun Zhou
  • Publication number: 20190031809
    Abstract: A polymer comprising: (a) polymerized units of 2-vinylpyridine; and (b) polymerized units of methyl methacrylate; a compound of formula (I) wherein R1 is hydrogen or methyl and R2 is a C6-C20 aliphatic polycyclic substituent; or a combination thereof.
    Type: Application
    Filed: December 7, 2015
    Publication date: January 31, 2019
    Inventors: Praveen Agarwal, Shih-Wei Chang, Kathleen M. O'Connell, Roy R. Raghunath, Weijun Zhou
  • Publication number: 20170369654
    Abstract: A curable resin composition comprising: (a) 27 to 60 wt % of a liquid siloxane oligomer comprising polymerized units of formula R1mR2nSi(OR3)4-m-n, wherein R1 is a C5-C20 aliphatic group comprising an oxirane ring fused to an alicyclic ring, R2 is a C1-C20 alkyl, C6-C30 aryl group, or a C5-C20 aliphatic group having one or more heteroatoms, R3 is a C1-C4 alkyl group or a C1-C4 acyl group, m is 0.1 to 2.0 and n is 0 to 2.0; (b) 35 to 66 wt % non-porous nanoparticles of silica, a metal oxide, or a mixture thereof, having an average particle diameter from 5 to 50 nm; and (c) 0.5 to 7 wt % of a cationic photoinitiator.
    Type: Application
    Filed: May 23, 2017
    Publication date: December 28, 2017
    Inventors: Joseph Kao, Weijun Zhou, Yusuke Matsuda, Yuanqiao Rao, Michael Mulzer, Jieqian Zhang