Patents by Inventor Wanjun Xu

Wanjun Xu 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: 20220106494
    Abstract: The present application is directed to a two-component aqueous epoxy resin paint comprising: a) an aqueous epoxy resin emulsion comprising a low epoxy equivalent epoxy resin having an epoxy equivalent weight ranging from 400 to 700 g/eq and a high epoxy equivalent epoxy resin having an epoxy equivalent weight of greater than 800 g/eq, and b) a curing agent, wherein a weight ratio of the low epoxy equivalent epoxy resin to the high epoxy equivalent epoxy resin is in the range of 5:5 to 9:1; and wherein the aqueous epoxy resin emulsion is a stable emulsion.
    Type: Application
    Filed: January 7, 2020
    Publication date: April 7, 2022
    Inventors: Luyi WANG, Weihua KAI, Rong XIONG, Wanjun XU
  • Patent number: 10844239
    Abstract: The present disclosure is directed to a two-component epoxy resin paint, comprising a) an epoxy resin component; and b) an amine component for curing the epoxy resin component, the amine component comprising: i) at least one polyamide curing agent; and ii) at least one Mannich base curing agent, wherein at least one of the polyamide curing agent and the Mannich base curing agent is derived from one or more multifunctional amines comprising at least one cycloaliphatic multifunctional amine, and wherein the cycloaliphatic multifunctional amine is present in an amount of 30 wt % or more relative to the total amount of the multifunctional amines, wherein the ratio by weight of the epoxy resin component a) to the amine component b) is in the range of 100:8 to 100:20.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: November 24, 2020
    Assignee: Valspar Sourcing, Inc.
    Inventors: Wanjun Xu, Fan Yang, Daqian Pei
  • Patent number: 10745584
    Abstract: The present disclosure is directed to a two-component polyurethane topcoat, comprising: a) a film-forming resin composition comprising i) an active hydrogen-containing polymer, having a hydroxyl value of 70 mg KOH/g polymer or more; ii) a polyester resin, having a hydroxyl value of less than 50 mg KOH/g resin and a viscosity of less than 6000 mPa·s at 25° C.; and iii) a package of flatting agents comprising a polysiloxane containing an effective silicon content of 30 wt % or more and an acrylics polymer having a weight average molecular weight in the range of 6,000 to 20,000 g/mol, wherein the weight ratio of the polysiloxane to the acrylics polymer is in the range of 1:5 to 1:15; and b) a polyisocyanate curing agent, wherein the ratio by weight of the component a) to the component b) is in the range of 100:10 to 100:25.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: August 18, 2020
    Assignee: Valspar Sourcing, Inc.
    Inventors: Fan Yang, Zhai Zhou, Wanjun Xu
  • Publication number: 20190161639
    Abstract: The present disclosure is directed to a two-component polyurethane topcoat, comprising: a) a film-forming resin composition comprising i) an active hydrogen-containing polymer, having a hydroxyl value of 70 mg KOH/g polymer or more; ii) a polyester resin, having a hydroxyl value of less than 50 mg KOH/g resin and a viscosity of less than 6000 mPa.s at 25° C.; and iii) a package of flatting agents comprising a polysiloxane containing an effective silicon content of 30 wt % or more and an acrylics polymer having a weight average molecular weight in the range of 6,000 to 20,000 g/mol, wherein the weight ratio of the polysiloxane to the acrylics polymer is in the range of 1:5 to 1:15; and b) a polyisocyanate curing agent, wherein the ratio by weight of the component a) to the component b) is in the range of 100:10 to 100:25.
    Type: Application
    Filed: April 17, 2017
    Publication date: May 30, 2019
    Applicant: The Sherwin-Williams Company
    Inventors: Fan Yang, Zhai Zhou, Wanjun Xu
  • Publication number: 20190119521
    Abstract: The present disclosure is directed to a two-component epoxy resin paint, comprising a) an epoxy resin component; and b) an amine component for curing the epoxy resin component, the amine component comprising: i) at least one polyamide curing agent; and ii) at least one Mannich base curing agent, wherein at least one of the polyamide curing agent and the Mannich base curing agent is derived from one or more multifunctional amines comprising at least one cycloaliphatic multifunctional amine, and wherein the cycloaliphatic multifunctional amine is present in an amount of 30 wt % or more relative to the total amount of the multifunctional amines, wherein the ratio by weight of the epoxy resin component a) to the amine component b) is in the range of 100:8 to 100:20.
    Type: Application
    Filed: April 17, 2017
    Publication date: April 25, 2019
    Inventors: Wanjun Xu, Fan Yang, Daqian Pei