Patents by Inventor Weijun Kevin Wang

Weijun Kevin Wang 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: 20230312818
    Abstract: A water dispersible sulfopolyester is provided wherein the sulfopolyester comprises: (a) residues of one or more dicarboxylic acids; (b) at least 10 mole percent of residues of at least one sulfomonomer; and (c) residues of two or more diols, wherein said diols comprise ethylene glycol and diethylene glycol, and wherein the sulfopolyester exhibits a glass transition temperature of at least 58° C., wherein the sulfopolyester comprises a diethylene glycol to ethylene glycol molar ratio of less than 0.65, wherein the sulfopolyester contains substantially equimolar proportions of acid moiety repeating units (100 mole percent) to hydroxy moiety repeating units (100 mole percent), and wherein all stated mole percentages are based on the total of all acid and hydroxy moiety repeating units being equal to 200 mole percent. Woven and nonwoven articles comprising the water dispersible sulfopolyester are also provided.
    Type: Application
    Filed: August 5, 2021
    Publication date: October 5, 2023
    Applicant: Eastman Chemical Company
    Inventors: Scott Ellery George, Joshua Seth Cannon, Weijun Kevin Wang
  • Publication number: 20230287174
    Abstract: A water dispersible sulfopolyester is provided wherein the sulfopolyester comprises: (a) residues of one or more dicarboxylic acids; (b) at least 10 mole percent of residues of at least one sulfomonomer; and (c) residues of two or more diols, wherein the diols comprise 1,4-cyclohexanedimethanol and diethylene glycol, wherein the sulfopolyester exhibits a glass transition temperature of at least 57° C., wherein the sulfopolyester contains substantially equimolar proportions of acid moiety repeating units (100 mole percent) to hydroxy moiety repeating units (100 mole percent), and wherein all stated mole percentages are based on the total of all acid and hydroxy moiety repeating units being equal to 200 mole percent. Woven articles and nonwoven articles are also provided.
    Type: Application
    Filed: August 5, 2021
    Publication date: September 14, 2023
    Applicant: Eastman Chemical Company
    Inventors: Scott Ellery George, Joshua Seth Cannon, Weijun Kevin Wang
  • Publication number: 20220297352
    Abstract: The present disclosure provides a process of recovering sulfopolyester comprising reduced impurity. Sulfopolyester is recovered from a composite material comprising water-dispersible sulfopolyester polymer and at least one non-water-dispersible polymer. The process includes washing the composite material comprising water-dispersible sulfopolyester with a solvent composition. The recovered sulfopolyester can be generated as a concentrated aqueous dispersion, a polymer melt, or a sulfopolyester solid.
    Type: Application
    Filed: August 7, 2020
    Publication date: September 22, 2022
    Applicant: Eastman Chemical Company
    Inventors: Kenny Randolph Parker, Scott Ellery George, Charles Stuart Everett, Kevin Leonard Urman, Joshua Seth Cannon, Weijun Kevin Wang, Chaoxiong Ma
  • Publication number: 20220298298
    Abstract: The present disclosure provides a process of recovering sulfopolyester comprising reduced impurity. Sulfopolyester is recovered from a composite material comprising water-dispersible sulfopolyester polymer and at least one non-water-dispersible polymer. The process includes washing the composite material comprising water-dispersible sulfopolyester with a solvent composition. The recovered sulfopolyester can be generated as a concentrated aqueous dispersion, a polymer melt, or a sulfopolyester solid.
    Type: Application
    Filed: August 7, 2020
    Publication date: September 22, 2022
    Applicant: Eastman Chemical Company
    Inventors: Kenny Randolph Parker, Scott Ellery George, Charles Stuart Everett, Kevin Leonard Urman, Joshua Seth Cannon, Weijun Kevin Wang, Chaoxiong Ma