Patents by Inventor Wumin Yu

Wumin Yu 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: 11802176
    Abstract: A bio-based epoxy resin obtained from a reaction mixture comprising a glycidyl ether component and a bio-based component comprising a fatty acid and a rosin acid, wherein the glycidyl ether component comprises at least two epoxide groups.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: October 31, 2023
    Assignee: INGEVITY SOUTH CAROLINA, LLC
    Inventors: Yongning Liu, Wumin Yu, Zhigang Chen
  • Publication number: 20230303756
    Abstract: Multifunctional resins suitable for use in coating and adhesive compositions derived from bio-based feedstocks are disclosed. The multifunctional resins are derived from a reaction mixture including (A) a polyol resin, (B) at least one compound having at least one of a dibasic carboxylic acid or derivative thereof, an anhydride, a caprolactone, a C?O source, a polyhydric alcohol, or a combination thereof, and (C) a catalyst.
    Type: Application
    Filed: January 11, 2023
    Publication date: September 28, 2023
    Inventors: Wumin YU, Yongning LIU
  • Patent number: 11629217
    Abstract: Aqueous hydrophobic polyurethane dispersions are made from urethane prepolymers derived from reacting constituents including at least one polyisocyanate, vegetable oil based saturated monoglycerides, non-isocyanate based urethane polyols prepared from polyamines and cyclic carbonates, at least one long-chain polymeric polyol or long-chain polyol from biorenewable resources, polyols with hydrophilic groups, optional polydimethysiloxane based polyols with hydroxyl functional groups terminated in one end and alkyl groups terminated in another end.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: April 18, 2023
    Assignee: RUST-OLEUM CORPORATION
    Inventors: Wumin Yu, Zhigang Chen
  • Publication number: 20230075163
    Abstract: A bio-based resin obtained from a reaction mixture comprising a glycidyl ether component and a bio-based component comprising a fatty acid and a rosin acid, wherein the glycidyl ether component comprises at least two epoxide groups.
    Type: Application
    Filed: August 25, 2022
    Publication date: March 9, 2023
    Inventors: Yongning Liu, Wumin Yu, Zhigang Chen
  • Publication number: 20210139640
    Abstract: A bio-based epoxy resin obtained from a reaction mixture comprising a glycidyl ether component and a bio-based component comprising a fatty acid and a rosin acid, wherein the glycidyl ether component comprises at least two epoxide groups.
    Type: Application
    Filed: October 30, 2020
    Publication date: May 13, 2021
    Inventors: Yongning Liu, Wumin Yu, Zhigang Chen
  • Patent number: 10392580
    Abstract: A seed-oil based reactive diluent is synthesized via a two-step process wherein in the first step, unsaturated seed oils such as soybean oil first react with mono-hydroxy functional amines to form an intermediate mixture composed of mono-hydroxy functional seed oil based derivatives and in the second step, a core molecule having multiple hydroxyl-reactive groups reacts with the intermediate mixture prepared from the first step and a polyol cross-linker to form a reactive diluent with a star-branched shape.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: August 27, 2019
    Assignee: Rust-Oleum Corporation
    Inventors: Wumin Yu, Zhigang Chen
  • Publication number: 20160009852
    Abstract: Aqueous hydrophobic polyurethane dispersions are made from urethane prepolymers derived from reacting constituents including at least one polyisocyanate, vegetable oil based saturated monoglycerides, non-isocyanate based urethane polyols prepared from polyamines and cyclic carbonates, at least one long-chain polymeric polyol or long-chain polyol from biorenewable resources, polyols with hydrophilic groups, optional polydimethysiloxane based polyols with hydroxyl functional groups terminated in one end and alkyl groups terminated in another end.
    Type: Application
    Filed: March 12, 2015
    Publication date: January 14, 2016
    Inventors: Wumin Yu, Zhigang Chen