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).
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Patent number: 10018930Abstract: 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: GrantFiled: January 25, 2017Date of Patent: July 10, 2018Assignee: Xerox CorporationInventors: Frank Ping-Hay Lee, Richard P. N. Veregin, Shigang S. Qiu, Michael J. D'Amato, Aurelian Valeriu Magdalinis, David John William Lawton
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Patent number: 9822217Abstract: 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: GrantFiled: March 19, 2012Date of Patent: November 21, 2017Assignee: Xerox CorporationInventors: Santiago Faucher, Guerino G. Sacripante, Shigang S. Qiu, Allan K. Chen, Jordan H. Wosnick
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Patent number: 9798255Abstract: 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: GrantFiled: June 9, 2016Date of Patent: October 24, 2017Assignee: Xerox CorporationInventors: Yulin Wang, Shigang S. Qiu, Chieh-Min Cheng, Kathryne S. Brockman
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Patent number: 9663615Abstract: 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: GrantFiled: February 5, 2016Date of Patent: May 30, 2017Assignee: XEROX CORPORATIONInventors: Karen A. Moffat, Shigang S. Qiu, Yulin Wang, Kevin F. Marcell, Wafa F. Bashir, Richard P N Veregin, John Lawrence Pawlak, Christopher M. Wolfe
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Publication number: 20170131649Abstract: 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: ApplicationFiled: January 25, 2017Publication date: May 11, 2017Inventors: Frank Ping-Hay Lee, Richard P. N. Veregin, Shigang S. Qiu, Michael J. D'Amato, Aurelian Valeriu Magdalinis, David John William Lawton
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Patent number: 9639017Abstract: 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: GrantFiled: April 19, 2014Date of Patent: May 2, 2017Assignee: Xerox CorporationInventors: Frank Ping-Hay Lee, Richard P. N. Veregin, Shigang S. Qiu, Michael J. D'Amato, Aurelian Valeriu Magdalinis, David John William Lawton
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Patent number: 9580543Abstract: 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: GrantFiled: February 5, 2016Date of Patent: February 28, 2017Assignee: XEROX CORPORATIONInventors: Shigang S. Qiu, Karen A. Moffat, Keegan Rankin
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Patent number: 9201324Abstract: 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: GrantFiled: February 18, 2010Date of Patent: December 1, 2015Assignee: Xerox CorporationInventors: Shigang S. Qiu, Kimberly D. Nosella, Tie Hwee Ng, Santiago Faucher, Fumii Higuchi
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Publication number: 20150301463Abstract: 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: ApplicationFiled: April 19, 2014Publication date: October 22, 2015Applicant: Xerox CorporationInventors: Frank Ping-Hay Lee, Richard P. N. Veregin, Shigang S. Qiu, Michael J. D'Amato, Aurelian Valeriu Magdalinis, David John William Lawton
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Publication number: 20150141572Abstract: 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: ApplicationFiled: November 20, 2013Publication date: May 21, 2015Applicant: Xerox CorporationInventors: Shigeng Li, Shigang S. Qiu, Peter Nguyen, Amy Grillo, Chieh-Min Cheng
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Patent number: 8932792Abstract: 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: GrantFiled: November 27, 2012Date of Patent: January 13, 2015Assignee: Xerox CorporationInventors: Yu Liu, Yulin Wang, Ke Zhou, Frank Ping-Hay Lee, Yiliang Wu, Shigang S. Qiu
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Patent number: 8858896Abstract: 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: GrantFiled: January 14, 2013Date of Patent: October 14, 2014Assignee: Xerox CorporationInventors: Yu Liu, Yulin Wang, Frank Ping-Hay Lee, Ke Zhou, Shigang S. Qiu
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Publication number: 20140200298Abstract: 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: ApplicationFiled: January 14, 2013Publication date: July 17, 2014Applicant: XEROX CORPORATIONInventors: YU LIU, Yulin Wang, Frank Ping-Hay Lee, Ke Zhou, Shigang S. Qiu
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Publication number: 20140147786Abstract: 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: ApplicationFiled: November 27, 2012Publication date: May 29, 2014Applicant: XEROX CORPORATIONInventors: Yu LIU, Yulin WANG, Ke ZHOU, Frank Ping-Hay LEE, Yiliang WU, Shigang S. QIU
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Patent number: 8703380Abstract: 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: GrantFiled: May 9, 2013Date of Patent: April 22, 2014Assignee: Xerox CoporationInventors: Shigang S Qiu, Santiago Faucher, Fumii Higuchi, Guerino G Sacripante
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Patent number: 8652723Abstract: 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: GrantFiled: March 9, 2011Date of Patent: February 18, 2014Assignee: Xerox CorporationInventors: Santiago Faucher, Kimberly D. Nosella, Shigang S. Qiu
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Publication number: 20140045116Abstract: 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: ApplicationFiled: August 7, 2012Publication date: February 13, 2014Applicant: XEROX CORPORATIONInventors: Enno E. AGUR, Shigang S. QIU, Ke ZHOU, Cuong VONG, Edward G. ZWARTZ, Santiago FAUCHER
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Publication number: 20130244151Abstract: 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: ApplicationFiled: March 19, 2012Publication date: September 19, 2013Inventors: Allan K. Chen, Santiago Faucher, Guerino G. Sacripante, Shigang S. Qiu
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Publication number: 20130244173Abstract: 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: ApplicationFiled: May 9, 2013Publication date: September 19, 2013Applicant: XEROX CORPORATIONInventors: Shigang S. Qiu, Santiago Faucher, Fumii Higuchi, Guerino G. Sacripante
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Publication number: 20130245197Abstract: 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: ApplicationFiled: March 19, 2012Publication date: September 19, 2013Inventors: Santiago Faucher, Guerino G. Sacripante, Shigang S. Qiu, Allan K. Chen, Jordan H. Wosnick