Patents by Inventor Qing Feng TONG

Qing Feng TONG 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).

  • Emulsifiers for Epoxy Resins, Aqueous Epoxy Resin Dispersions Comprising the Same, and Methods for Preparation Thereof
    Publication number: 20220396663
    Abstract: Disclosed herein are emulsifiers for epoxy resins obtained by reacting an epoxy resin with a mixture of a polyethylene glycol having an average molecular weight of greater than 4000 g/mol and less than 10,000 g/mol and a block copolymer of polyethylene glycol and polypropylene glycol, aqueous epoxy resin dispersions including the same, and methods for preparation thereof.
    Type: Application
    Filed: October 22, 2020
    Publication date: December 15, 2022
    Inventors: Qing Feng TONG, Su Chuan MA, Laszlo SZARVAS
  • METHOD FOR PRODUCING A VISCOSE SOLUTION AND A VISCOSE SOLUTION PRODUCED THEREBY AND A METHOD FOR PRODUCING VISCOSE FIBER
    Publication number: 20220119554
    Abstract: Described herein is a method for producing a viscose solution including a step of adding alkyl polyglycoside (APG) prior to and/or during xanthation of alkali cellulose. When APG is added prior to or during xanthation of alkali cellulose, the reactivity between alkali cellulose and CS2 could be increased and the xanthation could be accelerated, as a result of which formation of agglomerates and/or lumps in the obtained viscose solution and then the obtained viscose fiber spun therefrom is significantly reduced, relative to the situation when conventional surfactants such as phenyl ethoxylate are added likewise. Also described herein is a viscose solution obtained by the foresaid method, and a method for producing viscose fiber with the foresaid viscose solution or including the foresaid method.
    Type: Application
    Filed: February 19, 2020
    Publication date: April 21, 2022
    Inventors: Qing Feng Tong, Laszlo Szarvas, Frederic Bauer
  • Acrylic acid polymers neutralized with sodium and calcium ions and having a narrow molecular weight distribution
    Patent number: 10968295
    Abstract: An acrylic acid polymer having a weight average molecular weight Mw in the range from 3500 to 2000 g/mol and a polydispersity index Mw/Mn?2.5, wherein 30% to 60% of the acid groups of the acrylic acid polymers have been neutralized with calcium ions, 30% to 70% of the acrylic acid polymers have been neutralized with sodium ions and 0% to 10% of the acid groups of the acrylic acid polymers have not been neutralized.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: April 6, 2021
    Assignee: BASF SE
    Inventors: Ferdinand Leifeld, Achim Fessenbecker, Steffen Henkes, Massimiliano Bordignon, Vandana Kurkal-Siebert, Laszlo Szarvas, Qing Feng Tong
  • ACRYLIC ACID POLYMERS NEUTRALIZED WITH SODIUM AND CALCIUM IONS AND HAVING A NARROW MOLECULAR WEIGHT DISTRIBUTION
    Publication number: 20190276568
    Abstract: An acrylic acid polymer having a weight average molecular weight Mw in the range from 3500 to 2000 g/mol and a polydispersity index Mw/Mn?2.5, wherein 30% to 60% of the acid groups of the acrylic acid polymers have been neutralized with calcium ions, 30% to 70% of the acrylic acid polymers have been neutralized with sodium ions and 0% to 10% of the acid groups of the acrylic acid polymers have not been neutralized.
    Type: Application
    Filed: October 24, 2017
    Publication date: September 12, 2019
    Inventors: Ferdinand Leifeld, Achim FESSENBECKER, Steffen HENKES, Massimiliano BORDIGNON, Vandana KURKAL-SIEBERT, Laszlo SZARVAS, Qing Feng TONG