Patents by Inventor Shigang S. Qiu

Shigang S. Qiu 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: 10018930
    Abstract: A toner including a resin; and a colorant wax comprising a plurality of colorant wax particles comprising a colorant core surrounded by a wax shell, wherein the colorant wax particles exhibit a particle size distribution of from about 150 nanometers to less than about 300 nanometers; and wherein the colorant wax is prepared by (a) melting and mixing a dry colorant with at least one wax to form a colorant concentrate, wherein the colorant concentrate contains at least 25 percent by weight of colorant; (b) milling the colorant concentrate of step (a) to form a milled colorant concentrate; (c) combining the milled colorant concentrate of (b) with water and dispersing to form the plurality of colorant wax particles; wherein the melting and mixing of step (a) and the milling of step (b) is done in an immersion media mill; and wherein the combining of step (c) is done using a piston homogenizer.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: July 10, 2018
    Assignee: Xerox Corporation
    Inventors: Frank Ping-Hay Lee, Richard P. N. Veregin, Shigang S. Qiu, Michael J. D'Amato, Aurelian Valeriu Magdalinis, David John William Lawton
  • Patent number: 9822217
    Abstract: A branched polyester suitable for use in solvent-free emulsification, the branched polyester having a first original weight average molecular weight before undergoing solvent-free emulsification and a second weight average molecular weight after undergoing solvent-free emulsification, wherein the branched polyester has a structure that limits degradation of the polyester during solvent-free emulsification to less than about 20 percent of the first original weight average molecular weight, wherein the branched polyester comprises a compound of the formula described.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: November 21, 2017
    Assignee: Xerox Corporation
    Inventors: Santiago Faucher, Guerino G. Sacripante, Shigang S. Qiu, Allan K. Chen, Jordan H. Wosnick
  • Patent number: 9798255
    Abstract: A process is provided comprising forming a phase inversed resin emulsion comprising a resin, water, and an organic solvent, wherein the process excludes subjecting the phase inversed resin emulsion to an organic solvent removal technique, thereby retaining the organic solvent in the phase inversed resin emulsion. The phase inversed resin emulsion may be formed by dissolving a resin in an organic solvent to form a resin mixture; optionally, adding a neutralizing agent to the resin mixture to neutralize acid groups on the resin; and adding a sufficient amount of water to the resin mixture to emulsify and induce phase inversion in the resin mixture. Also provided are processes for preparing particles and processes for preparing toners utilizing the phase inversed resin emulsions.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: October 24, 2017
    Assignee: Xerox Corporation
    Inventors: Yulin Wang, Shigang S. Qiu, Chieh-Min Cheng, Kathryne S. Brockman
  • Patent number: 9663615
    Abstract: A method of synthesizing a branched polyester resin. Particularly, the method includes an alkoxylation reaction that includes reacting a monomer bisphenol A with a cyclic alkylene carbonate.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: May 30, 2017
    Assignee: XEROX CORPORATION
    Inventors: Karen A. Moffat, Shigang S. Qiu, Yulin Wang, Kevin F. Marcell, Wafa F. Bashir, Richard P N Veregin, John Lawrence Pawlak, Christopher M. Wolfe
  • Publication number: 20170131649
    Abstract: A toner including a resin; and a colorant wax comprising a plurality of colorant wax particles comprising a colorant core surrounded by a wax shell, wherein the colorant wax particles exhibit a particle size distribution of from about 150 nanometers to less than about 300 nanometers; and wherein the colorant wax is prepared by (a) melting and mixing a dry colorant with at least one wax to form a colorant concentrate, wherein the colorant concentrate contains at least 25 percent by weight of colorant; (b) milling the colorant concentrate of step (a) to form a milled colorant concentrate; (c) combining the milled colorant concentrate of (b) with water and dispersing to form the plurality of colorant wax particles; wherein the melting and mixing of step (a) and the milling of step (b) is done in an immersion media mill; and wherein the combining of step (c) is done using a piston homogenizer.
    Type: Application
    Filed: January 25, 2017
    Publication date: May 11, 2017
    Inventors: Frank Ping-Hay Lee, Richard P. N. Veregin, Shigang S. Qiu, Michael J. D'Amato, Aurelian Valeriu Magdalinis, David John William Lawton
  • Patent number: 9639017
    Abstract: A toner including a resin; and a colorant wax comprising a plurality of colorant wax particles comprising a colorant core surrounded by a wax shell, wherein the colorant wax particles exhibit a particle size distribution of from about 150 nanometers to less than about 300 nanometers; and wherein the colorant wax is prepared by (a) melting and mixing a dry colorant with at least one wax to form a colorant concentrate, wherein the colorant concentrate contains at least 25 percent by weight of colorant; (b) milling the colorant concentrate of step (a) to form a milled colorant concentrate; (c) combining the milled colorant concentrate of (b) with water and dispersing to form the plurality of colorant wax particles; wherein the melting and mixing of step (a) and the milling of step (b) is done in an immersion media mill; and wherein the combining of step (c) is done using a piston homogenizer.
    Type: Grant
    Filed: April 19, 2014
    Date of Patent: May 2, 2017
    Assignee: Xerox Corporation
    Inventors: Frank Ping-Hay Lee, Richard P. N. Veregin, Shigang S. Qiu, Michael J. D'Amato, Aurelian Valeriu Magdalinis, David John William Lawton
  • Patent number: 9580543
    Abstract: A method of making a branched polyester resin with a target glass transition temperature. Particularly, the target glass transition temperature can be achieved by adjusting the molar ratio of the first cyclic alkylene carbonate to the second cyclic alkylene carbonate; adjusting the molar ratio of the first alkoxylated BPA monomer to the second alkoxylated BPA monomers; adjusting the molar ratio of the first diacid to the second diacid; or any combination thereof.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: February 28, 2017
    Assignee: XEROX CORPORATION
    Inventors: Shigang S. Qiu, Karen A. Moffat, Keegan Rankin
  • Patent number: 9201324
    Abstract: A process for making a latex emulsion suitable for use in a toner composition includes contacting at least one polyester resin optionally with an organic solvent to form a resin mixture, adding a primary amine, optionally a surfactant, and deionized water to the mixture.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: December 1, 2015
    Assignee: Xerox Corporation
    Inventors: Shigang S. Qiu, Kimberly D. Nosella, Tie Hwee Ng, Santiago Faucher, Fumii Higuchi
  • Publication number: 20150301463
    Abstract: A toner including a resin; and a colorant wax comprising a plurality of colorant wax particles comprising a colorant core surrounded by a wax shell, wherein the colorant wax particles exhibit a particle size distribution of from about 150 nanometers to less than about 300 nanometers; and wherein the colorant wax is prepared by (a) melting and mixing a dry colorant with at least one wax to form a colorant concentrate, wherein the colorant concentrate contains at least 25 percent by weight of colorant; (b) milling the colorant concentrate of step (a) to form a milled colorant concentrate; (c) combining the milled colorant concentrate of (b) with water and dispersing to form the plurality of colorant wax particles; wherein the melting and mixing of step (a) and the milling of step (b) is done in an immersion media mill; and wherein the combining of step (c) is done using a piston homogenizer.
    Type: Application
    Filed: April 19, 2014
    Publication date: October 22, 2015
    Applicant: Xerox Corporation
    Inventors: Frank Ping-Hay Lee, Richard P. N. Veregin, Shigang S. Qiu, Michael J. D'Amato, Aurelian Valeriu Magdalinis, David John William Lawton
  • Publication number: 20150141572
    Abstract: A process includes dissolving a first polymer in an aprotic solvent, absent a protic organic solvent, to form a polymer solution, neutralizing acidic residues present in the first polymer by adding a neutralizing agent to the polymer solution, contacting the polymer solution with water to form a latex, removing the aprotic solvent from the latex, capturing the removed aprotic solvent as recycled solvent, and dissolving a second polymer with the recycled solvent.
    Type: Application
    Filed: November 20, 2013
    Publication date: May 21, 2015
    Applicant: Xerox Corporation
    Inventors: Shigeng Li, Shigang S. Qiu, Peter Nguyen, Amy Grillo, Chieh-Min Cheng
  • Patent number: 8932792
    Abstract: A method for preparing latex emulsion compositions uses a steam-driven emulsification process, and a method for preparing a toner using the latex emulsion compositions. The method includes contacting a resin with an organic solvent and optionally a neutralization agent; and applying steam or heated water vapor to contact the resin to prepare a latex emulsion. An apparatus can perform the method.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: January 13, 2015
    Assignee: Xerox Corporation
    Inventors: Yu Liu, Yulin Wang, Ke Zhou, Frank Ping-Hay Lee, Yiliang Wu, Shigang S. Qiu
  • Patent number: 8858896
    Abstract: Processes for making toners, and in particular, emulsion aggregation (EA) toners. These toners exhibit a low melt temperature while simultaneously exhibiting excellent relative humidity sensitivity regarding charging properties. In embodiments, the process comprises the preparation of the latex emulsion comprising high ratio resin compositions by injection of steam and neutralization agent vapors into the latex emulsion.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: October 14, 2014
    Assignee: Xerox Corporation
    Inventors: Yu Liu, Yulin Wang, Frank Ping-Hay Lee, Ke Zhou, Shigang S. Qiu
  • Publication number: 20140200298
    Abstract: Processes for making toners, and in particular, emulsion aggregation (EA) toners. These toners exhibit a low melt temperature while simultaneously exhibiting excellent relative humidity sensitivity regarding charging properties. In embodiments, the process comprises the preparation of the latex emulsion comprising high ratio resin compositions by injection of steam and neutralization agent vapors into the latex emulsion.
    Type: Application
    Filed: January 14, 2013
    Publication date: July 17, 2014
    Applicant: XEROX CORPORATION
    Inventors: YU LIU, Yulin Wang, Frank Ping-Hay Lee, Ke Zhou, Shigang S. Qiu
  • Publication number: 20140147786
    Abstract: A method for preparing latex emulsion compositions uses a steam-driven emulsification process, and a method for preparing a toner using the latex emulsion compositions. The method includes contacting a resin with an organic solvent and optionally a neutralization agent; and applying steam or heated water vapor to contact the resin to prepare a latex emulsion. An apparatus can perform the method.
    Type: Application
    Filed: November 27, 2012
    Publication date: May 29, 2014
    Applicant: XEROX CORPORATION
    Inventors: Yu LIU, Yulin WANG, Ke ZHOU, Frank Ping-Hay LEE, Yiliang WU, Shigang S. QIU
  • Patent number: 8703380
    Abstract: A process comprising: contacting at least one bio-based amorphous polyester resin with an optional plasticizer to form a pre-blend mixture; neutralizing the pre-blend mixture with a neutralizing agent; contacting the pre-blend mixture with a surfactant; melt-mixing the pre-blend mixture; contacting the melt-mixed mixture with de-ionized water to form an oil in water emulsion possessing a latex; and recovering the latex.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: April 22, 2014
    Assignee: Xerox Coporation
    Inventors: Shigang S Qiu, Santiago Faucher, Fumii Higuchi, Guerino G Sacripante
  • Patent number: 8652723
    Abstract: A toner composition including a colorant-polyester polymer having at least one colorant and at least one polyester resin, an optional non-colorant polyester polymer, an optional additional colorant, an optional wax, and an optional additive, where the colorant is covalently linked to some or all of the polyester resin and the polyester resin is obtained by polymerizing a lactone using an enzyme catalyst. Methods for preparing a toner composition including an emulsion aggregation process.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: February 18, 2014
    Assignee: Xerox Corporation
    Inventors: Santiago Faucher, Kimberly D. Nosella, Shigang S. Qiu
  • Publication number: 20140045116
    Abstract: A method of making a toner that includes adding pigments into an emulsion aggregation toner without first preparing a pigment dispersion. The method eliminates the pigment dispersion step in the manufacture of emulsion aggregation toilers by surface-treating pigments. Dry surface-treated pigments can be directly incorporated into the toner prior to aggregation in the aggregation coalescence process without the need to first prepare aqueous pigment dispersions.
    Type: Application
    Filed: August 7, 2012
    Publication date: February 13, 2014
    Applicant: XEROX CORPORATION
    Inventors: Enno E. AGUR, Shigang S. QIU, Ke ZHOU, Cuong VONG, Edward G. ZWARTZ, Santiago FAUCHER
  • Publication number: 20130244151
    Abstract: A toner comprising a branched polyester suitable for use in solvent-free emulsification, the branched polyester having a first original weight average molecular weight before undergoing solvent-free emulsification and a second weight average molecular weight after undergoing solvent-free emulsification, wherein the branched polyester has a structure that limits degradation of the polyester during solvent-free emulsification to less than about 20 percent of the first original weight average molecular weight, wherein the branched polyester comprises a compound of the formula described; an optional wax, and an optional colorant.
    Type: Application
    Filed: March 19, 2012
    Publication date: September 19, 2013
    Inventors: Allan K. Chen, Santiago Faucher, Guerino G. Sacripante, Shigang S. Qiu
  • Publication number: 20130244173
    Abstract: A process comprising: contacting at least one bio-based amorphous polyester resin with an optional plasticizer to form a pre-blend mixture; neutralizing the pre-blend mixture with a neutralizing agent; contacting the pre-blend mixture with a surfactant; melt-mixing the pre-blend mixture; contacting the melt-mixed mixture with de-ionized water to form an oil in water emulsion possessing a latex; and recovering the latex.
    Type: Application
    Filed: May 9, 2013
    Publication date: September 19, 2013
    Applicant: XEROX CORPORATION
    Inventors: Shigang S. Qiu, Santiago Faucher, Fumii Higuchi, Guerino G. Sacripante
  • Publication number: 20130245197
    Abstract: A branched polyester suitable for use in solvent-free emulsification, the branched polyester having a first original weight average molecular weight before undergoing solvent-free emulsification and a second weight average molecular weight after undergoing solvent-free emulsification, wherein the branched polyester has a structure that limits degradation of the polyester during solvent-free emulsification to less than about 20 percent of the first original weight average molecular weight, wherein the branched polyester comprises a compound of the formula described.
    Type: Application
    Filed: March 19, 2012
    Publication date: September 19, 2013
    Inventors: Santiago Faucher, Guerino G. Sacripante, Shigang S. Qiu, Allan K. Chen, Jordan H. Wosnick