Patents by Inventor Pu Luo

Pu Luo 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: 20220127686
    Abstract: The present invention relates to a composition comprising an aqueous dispersion of submicron-sized polymer particles and micron-sized polymer beads, wherein the polymer particles or beads or both are functionalized with phosphorus acid groups. The composition of the present invention is useful for providing a matte finish on substrates, such as leather, textiles, wallboard, decorative coatings, concrete, and wood, with improved stain resistance. The present invention also relates to a leather substrate coated with a clear matte finish comprising an acrylic or styrene-acrylic polymer film and micron-sized polymer beads, wherein the film or the beads or both are functionalized with a phosphorus acid monomer.
    Type: Application
    Filed: January 11, 2022
    Publication date: April 28, 2022
    Inventors: Joy A. Gallagher, Philip R. Harsh, Pu Luo, Edwin Nungesser
  • Patent number: 11254990
    Abstract: The present invention relates to a composition comprising an aqueous dispersion of submicron-sized polymer particles and micron-sized polymer beads, wherein the polymer particles or beads or both are functionalized with phosphorus acid groups. The composition of the present invention is useful for providing a matte finish on substrates, such as leather, textiles, wallboard, decorative coatings, concrete, and wood, with improved stain resistance. The present invention also relates to a leather substrate coated with a clear matte finish comprising an acrylic or styrene-acrylic polymer film and micron-sized polymer beads, wherein the film or the beads or both are functionalized with a phosphorus acid monomer.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: February 22, 2022
    Assignee: Rohm and Haas Company
    Inventors: Joy A. Gallagher, Philip R. Harsh, Pu Luo, Edwin Nungesser
  • Publication number: 20210246293
    Abstract: Provided is a polymeric composition comprising a continuous phase that comprises a matrix polymer and a dispersed phase comprising polymer particles, wherein the polymer particles comprise: (a) 30% to 85% by weight, based on the dry weight of the polymer particles, a core polymer having Tg of ?35° C. or lower; (b) 15% to 50% by weight, based on the dry weight of the polymer particles, an intermediate polymer having Tg that is 20° C. or lower and that is higher than the Tg of the core polymer by 10° C. or more; and (c) 5% to 30% by weight, based on the dry weight of the polymer particles, a shell polymer having Tg of 50° C. or higher; wherein the shell polymer comprises polymerized units of all vinyl aromatic monomers in an amount of 1% or less, by weight based on the weight of the shell polymer. Also provided is a method of making the composition.
    Type: Application
    Filed: March 4, 2019
    Publication date: August 12, 2021
    Inventors: Hailan Guo, Pu Luo, Morris Wills
  • Publication number: 20210054183
    Abstract: Provided is polymer particle comprising (a) 40% to 85% by weight, based on the dry weight of the polymer particle, a core polymer having Tg of ?35° C. or lower; (b) 15% to 50% by weight, based on the dry weight of the polymer particle, an intermediate polymer having Tg that is 20° C. or lower and that is higher than the Tg of the core polymer by 10° C. or more; (c) 5% to 30% by weight, based on the dry weight of the polymer particle, a shell polymer having Tg of 50° C. or higher; wherein the shell polymer comprises polymerized units of all vinyl aromatic monomers in an amount of 1% or less, by weight based on the weight of the shell polymer.
    Type: Application
    Filed: March 4, 2019
    Publication date: February 25, 2021
    Inventors: Hailan Guo, Pu Luo, Morris Wills
  • Publication number: 20200385825
    Abstract: A method for forming chrome-free retanned leather including: (a) contacting wet white (chrome-free tanned hide) with a retanning mixture comprising from 2% to 15%, by solids weight, based on the wet weight of the wet white, of an amphoteric polymer composition comprising amine functional units and acid functional units; and (b) applying a polymeric overcoat containing an acrylic copolymer with one or more metal transition elements, with a thickness of no greater than 100 microns, to the retanned wet white, is provided. The present invention also provides a chrome-free retanned leather formed by the method.
    Type: Application
    Filed: December 18, 2015
    Publication date: December 10, 2020
    Inventors: Edwin Nungesser, Andrew Hejl, Caiyun Li, Pu Luo
  • Patent number: 10858531
    Abstract: The present invention is related to a coating composition comprising a) an aqueous dispersion of acrylic or styrene-acrylic polymer particles functionalized with structural units of a monomer with keto functionality and structural units of a phosphorus acid monomer; b) a dispersant comprising structural units of a carboxylic acid monomer and a monomer with keto functionality; and c) a dihydrazide crosslinking agent. The composition of the present invention is useful for improving scrub resistance in a coating formed from the composition.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: December 8, 2020
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: James C. Bohling, Pu Luo, Qing Zhang
  • Publication number: 20190322889
    Abstract: The present invention is related to a coating composition comprising a) an aqueous dispersion of acrylic or styrene-acrylic polymer particles functionalized with structural units of a monomer with keto functionality and structural units of a phosphorus acid monomer; b) a dispersant comprising structural units of a carboxylic acid monomer and a monomer with keto functionality; and c) a dihydrazide crosslinking agent. The composition of the present invention is useful for improving scrub resistance in a coating formed from the composition.
    Type: Application
    Filed: March 12, 2019
    Publication date: October 24, 2019
    Inventors: James C. Bohling, Pu Luo, Qing Zhang
  • Patent number: 10435582
    Abstract: The present invention relates to composition comprising a) first polymer particles that are functionalized with structural units of a TiO2-adsorbing monomer, and second polymer particles that are functionalized with structural units of diacetone acrylamide; and b) a dihydrazide or a diamine crosslinking agent, based on the weight of the composition. Coatings prepared from the composition of the present invention shows improved hardness and gloss.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: October 8, 2019
    Assignee: Rohm and Haas Company
    Inventors: James C. Bohling, Carol Hawkins, Anna Kvecher, Pu Luo, Partha S. Majumdar
  • Patent number: 10119040
    Abstract: The present invention relates to a deep base or accent coating composition comprising an acrylic based binder and a Zn++ additive. The composition of the present invention resists water staining better than comparable formulations that do not contain the additive.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: November 6, 2018
    Assignee: Rohm and Haas Company
    Inventors: Gary W. Dombrowski, Pu Luo, Partha S. Majumdar
  • Patent number: 10119018
    Abstract: The present invention relates to a process for preparing an aqueous dispersion of a vinyl acetate polymer comprising the step of polymerizing vinyl acetate under emulsion polymerization conditions in the presence of a chain transfer agent which is a hypophosphite salt or X—R1—SH, where R1 is a C1-C4 alkyl group and X is sulfonate, hydroxyl, sulfate, phosphate, phosphonate, carboxylic acid or a salt thereof, or C1-C3-alkyl carboxylate. The process provides a way of lowering the viscosity of the vinyl acetate polymer at a given solids content.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: November 6, 2018
    Assignee: Rohm and Haas Company
    Inventors: Kebede Beshah, James C. Bohling, Pu Luo
  • Publication number: 20180311117
    Abstract: An aqueous personal care composition comprising 0.5 to 10 wt % polymer encapsulated particles of titanium dioxide or zinc oxide; said polymer encapsulated particles comprising: (i) particles of titanium dioxide or zinc oxide having an average particle diameter from 10 to 200 nm; (ii) 0.25 to 10 wt % water-soluble sulfur acid-functional first polymer, based on weight of said particles of titanium dioxide or zinc oxide; and (iii) from 10% to 200%, by weight second polymer, based on weight of said particles of titanium dioxide or zinc oxide, wherein the second polymer at least partially encapsulates said particle of titanium dioxide or zinc oxide.
    Type: Application
    Filed: November 8, 2016
    Publication date: November 1, 2018
    Inventors: Fanwen Zeng, Pu Luo, Xiaodong Lu, Junsi Gu
  • Publication number: 20180094160
    Abstract: The present invention relates to composition comprising a) first polymer particles that are functionalized with structural units of a TiO2-adsorbing monomer, and second polymer particles that are functionalized with structural units of diacetone acrylamide; and b) a dihydrazide or a diamine crosslinking agent, based on the weight of the composition. Coatings prepared from the composition of the present invention shows improved hardness and gloss.
    Type: Application
    Filed: September 28, 2017
    Publication date: April 5, 2018
    Inventors: James C. Bohling, Carol Hawkins, Anna Kvecher, Pu Luo, Partha S. Majumdar
  • Publication number: 20180037753
    Abstract: The present invention relates to a deep base or accent coating composition comprising an acrylic based binder and a Zn++ additive. The composition of the present invention resists water staining better than comparable formulations that do not contain the additive.
    Type: Application
    Filed: July 26, 2017
    Publication date: February 8, 2018
    Inventors: Gary W. Dombrowski, Pu Luo, Partha S. Majumdar
  • Patent number: 9828498
    Abstract: The present invention relates to a process for preparing an aqueous dispersion of a vinyl acetate polymer comprising the step of polymerizing vinyl acetate under emulsion polymerization conditions in the presence of a chain transfer agent which is a hypophosphite salt or X—R1—SH, where R1 is a C1-C4 alkyl group and X is sulfonate, hydroxyl, sulfate, phosphate, phosphonate, carboxylic acid or a salt thereof, or C1-C3-alkyl carboxylate. The process provides a way of lowering the viscosity of the vinyl acetate polymer at a given solids content.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: November 28, 2017
    Assignee: Rohm and Haas Company
    Inventors: James C. Bohling, Kebede Beshah, Pu Luo
  • Patent number: 9828509
    Abstract: The present invention is a composition comprising a) an aqueous dispersion of TiO2 particles encapsulated with an encapsulating acrylic or styrene-acrylic polymer comprising from structural units of diacetone acrylamide; and b) adipic acid dihydrazide. The composition is useful in coatings applications and shows a surprising improvement in gloss over compositions that do not include diacetone acrylamide functionalized encapsulating polymer and adipic acid dihydrazide.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: November 28, 2017
    Assignee: Rohm and Haas Company
    Inventors: James C. Bohling, David G. Kelly, Pu Luo, Yogesh Tiwary
  • Patent number: 9777183
    Abstract: The present invention relates to a process for preparing an aqueous dispersion of polymer encapsulated TiO2 particles, comprising a multistage polymerization steps that includes a relatively large amount of low Tg first monomers and a relatively small amount of high Tg second monomers that comprise a relatively high concentration of an acid monomer. The dispersion of encapsulated TiO2 particles shows significantly improved freeze-thaw stability as compared with prior art processes that do not include staging with the second monomers described herein.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: October 3, 2017
    Assignee: Rohm and Haas Company
    Inventors: James C. Bohling, David G. Kelly, Pu Luo, Yogesh Tiwary
  • Publication number: 20170121517
    Abstract: The present invention relates to a process for preparing an aqueous dispersion of a vinyl acetate polymer comprising the step of polymerizing vinyl acetate under emulsion polymerization conditions in the presence of a chain transfer agent which is a hypophosphite salt or X—R1—SH, where R1 is a C1-C4 alkyl group and X is sulfonate, hydroxyl, sulfate, phosphate, phosphonate, carboxylic acid or a salt thereof, or C1-C3-alkyl carboxylate. The process provides a way of lowering the viscosity of the vinyl acetate polymer at a given solids content.
    Type: Application
    Filed: October 31, 2016
    Publication date: May 4, 2017
    Inventors: Kebede Beshah, James C. Bohling, Pu Luo
  • Publication number: 20160369359
    Abstract: The present invention relates to a composition comprising an aqueous dispersion of submicron-sized polymer particles and micron-sized polymer beads, wherein the polymer particles or beads or both are functionalized with phosphorus acid groups. The composition of the present invention is useful for providing a matte finish on substrates, such as leather, textiles, wallboard, decorative coatings, concrete, and wood, with improved stain resistance. The present invention also relates to a leather substrate coated with a clear matte finish comprising an acrylic or styrene-acrylic polymer film and micron-sized polymer beads, wherein the film or the beads or both are functionalized with a phosphorus acid monomer.
    Type: Application
    Filed: June 16, 2016
    Publication date: December 22, 2016
    Inventors: Joy A. Gallagher, Philip R. Harsh, Pu Luo, Edwin Nungesser
  • Publication number: 20160340539
    Abstract: The present invention relates to a process for preparing an aqueous dispersion of polymer encapsulated TiO2 particles, comprising a multistage polymerization steps that includes a relatively large amount of low Tg first monomers and a relatively small amount of high Tg second monomers that comprise a relatively high concentration of an acid monomer. The dispersion of encapsulated TiO2 particles shows significantly improved freeze-thaw stability as compared with prior art processes that do not include staging with the second monomers described herein.
    Type: Application
    Filed: May 17, 2016
    Publication date: November 24, 2016
    Inventors: James C. Bohling, David G. Kelly, Pu Luo, Yogesh Tiwary
  • Patent number: 9469776
    Abstract: The present invention relates to a pre-paint composite comprising an aqueous slurry of TiO2 particles and a polymeric binder, wherein from 35 to 90 weight percent of the polymeric binder is attached to the TiO2 particles, based on the weight of polymeric binder in the pre-paint composite. The pre-composite of the present invention is useful in paint compositions, particularly those that require freeze-thaw stability.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: October 18, 2016
    Assignee: Rohm and Haas Company
    Inventors: David G. Kelly, Pu Luo, Michael Rhodes, Yogesh Tiwary