Patents by Inventor Yunfei Yan

Yunfei Yan 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: 20150284902
    Abstract: Described herein are methods of preparing PUD based, poromeric, synthetic leathers having improved embossing characteristics, the methods comprising: preparing a polyurethane prepolymer, wherein the prepolymer comprises at least one isocyanate resin, and at least two polyols; preparing a first mixture comprising the polyurethane prepolymer, water, a chain extender, and a first surfactant that comprises at least one surfactant; preparing a second mixture comprising the first mixture, a thickening agent, and a second surfactant the comprises at least one surfactant, frothing the second mixture and thereby forming a frothed second mixture; applying the frothed second mixture to a fabric and thereby forming a coated fabric; optionally adjusting the thickness of the frothed third mixture on the fabric; and drying the coated fabric.
    Type: Application
    Filed: October 16, 2012
    Publication date: October 8, 2015
    Inventors: Debkumar BHATTACHARJEE, Weichao GU, Ning KANG, Bo LIU, Yunfei YAN, Hongliang ZHANG, Chao Zhang
  • Publication number: 20150259851
    Abstract: Disclosed herein are methods of producing externally stabilized, poromeric synthetic leathers having improved peel strength, the methods comprising: preparing a prepolymer from a mixture comprising at least one polyester polyol, at least one polyether polyol, at least one isocyanate and optionally in a solvent; mixing the prepolymer, water, and a first surfactant; optionally add a second chain extender to form a PUD; preparing a mixture comprising said PUD, at least one surfactant, and at least one thickener; frothing said mixture; applying the frothed mixture to a fabric and thereby forming a coated fabric; adjusting the thickness of the frothed mixture on the coated fabric; drying the coated fabric. Methods of improving the peel strength of poromeric synthetic leathers are also disclosed. Externally stabilized synthetic leathers having improved peel strength are also disclosed.
    Type: Application
    Filed: October 16, 2012
    Publication date: September 17, 2015
    Applicant: Dow Global Technologies LLC
    Inventors: Weichao Gu, Ning Kang, Hong Liang Zhang, Yunfei Yan, Chao Zhang, Bo Liu
  • Publication number: 20140080710
    Abstract: Provided are compositions comprising a collection of coated particles, wherein the coated particles comprises an active ingredient dispersed in an resin matrix; and a coating comprising at least one hydrophobic compound. Also provided are methods for preparing compositions comprising: (a) blending an active ingredient (for example, 1-MCP complex powder) with resin at the temperature slightly over the melting point of the resin; (b) dispersing the blend into an oil medium containing hydrophobic particles by shearing and obtain an oil dispersion; and (c) consolidating the resin particles by cooling. Thus, the active ingredient (for example, 1-MCP complex powder) is imbedded in the resin matrix spheres, and the hydrophobic particles, which also serve as Pickering emulsifier to stabilize the matrix spheres, form a coating layer around the matrix spheres to provide protection against water. Thus, the sphere is composed of the “Pickering” particle and resin matrix, in which the active ingredient is imbedded.
    Type: Application
    Filed: September 17, 2013
    Publication date: March 20, 2014
    Inventors: Shiling Zhang, Christian Guy Becker, Yunfei Yan, Yongchun Chen
  • Publication number: 20140080711
    Abstract: Compositions for delivering an active ingredient include particles comprising an active ingredient (for example, 1-MCP complex powder) imbedded in a resin matrix, the particles being suspended in an oil medium. Methods for preparing such compositions include blending an active ingredient with a resin at a temperature higher than the melting point of the resin to provide a blend; dispersing the blend into an oil medium at a temperature higher than the melting point of the resin to provide a dispersion comprising dispersed particles in the oil medium; and consolidating the dispersed particles to provide consolidated particles comprising a solid matrix of the resin impregnated with the active ingredient. Methods of using such compositions include mixing the compositions with an aqueous medium to provide an emulsion or slurry and either contacting plants or plant parts with the emulsion or placing the emulsion near plants or plant parts.
    Type: Application
    Filed: September 17, 2013
    Publication date: March 20, 2014
    Inventors: Shiling Zhang, Christian Guy Becker, Yunfei Yan, Yutian Shi, Yongchun Chen, Thomas H. Kalantar, Yueqian Zhen, Xiuhan Grace Yang, Christopher John Tucker
  • Publication number: 20130210977
    Abstract: The invention generally relates to an aqueous thermoplastic polymer dispersion containing ingredients that include, among other things, a dispersion desensitizer; methods of use thereof, and articles manufactured therefrom.
    Type: Application
    Filed: September 29, 2010
    Publication date: August 15, 2013
    Applicants: ROHM AND HAAS COMPANY, DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Yunfei Yan, Wei Chao Gu, Dong Wang, Wenyu Shang, Gary M. Strandburg