Patents by Inventor Kebede Beshah

Kebede Beshah 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: 10676580
    Abstract: The present invention relates to an aqueous dispersion of a class of organic phosphate functionalized microspheres having a particle size in the range of from 1 ?m to 25 ?m, and a process for preparing the dispersion. The microspheres, which have a low coefficient of variation and low gel concentration, are useful in coatings applications, especially where a matte finish is desired.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: June 9, 2020
    Assignee: Rohm and Haas Company
    Inventors: Kebede Beshah, James C. Bohling, Ibrahim Eryazici, Philip R. Harsh, Partha S. Majumdar, Edwin Nungesser
  • Publication number: 20180327562
    Abstract: The present invention relates to an aqueous dispersion of a class of organic phosphate functionalized microspheres having a particle size in the range of from 1 ?m to 25 ?m, and a process for preparing the dispersion. The microspheres, which have a low coefficient of variation and low gel concentration, are useful in coatings applications, especially where a matte finish is desired.
    Type: Application
    Filed: May 8, 2018
    Publication date: November 15, 2018
    Inventors: Kebede Beshah, James C. Bohling, Ibrahim Eryazici, Philip R. Harsh, Partha S. Majumdar, Edwin Nungesser
  • 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
  • Patent number: 9969897
    Abstract: A process to produce a dispersion comprising feeding ethylcellulose polymer and a dispersant into a melt and mix zone of an extruder wherein the ethylcellulose polymer and dispersant are melted and mixed together to form a melt; conveying the melt to an emulsification zone of the extruder in which the temperature and pressure are controlled; feeding a base and water into the emulsification zone wherein the melt is dispersed to form a high internal phase emulsion; conveying the emulsion to a dilution and cooling zone of the extruder; and feeding water into the dilution and cooling zone to dilute the high internal phase emulsion thereby forming an aqueous dispersion is provided.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: May 15, 2018
    Assignees: ROHM AND HAAS COMPANY, DOW GLOBAL TECHNOLOGIES LLC
    Inventors: True L. Rogers, Aslin Izmitli, Susan L. Jordan, David L. Malotky, Shari L. Workentine, Kebede Beshah
  • Publication number: 20170362365
    Abstract: The present invention provides amphiphilic comb polymer compositions of phosphorus acid group containing backbone polymers of methacrylic anhydride having hydrophobic alkyl, aryl, cycloalkyl or polyolefin ester or amide side chain groups formed on the backbone polymers and comprising from 75 to 100 wt. %, based on the total weight of monomers used to make the backbone polymer, of methacrylic acid polymerized units, wherein in the backbone polymer from 20 to less than 70 wt. %, preferably from 50 to 67 wt. % of the methacrylic acid polymerized units comprise methacrylic anhydride groups as determined by titration of the backbone polymer. As polymeric additives, the polymers can compatibilize polyolefins and polar polymers like polyesters.
    Type: Application
    Filed: December 9, 2015
    Publication date: December 21, 2017
    Inventors: Charles J. Rand, Kebede Beshah, William J. Harris, Thomas Oswald, Jeffrey D. Weinhold
  • 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
  • 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: 20170037266
    Abstract: The present invention is a composition comprising a stable aqueous dispersion of polymer particles and a sorbate ester, which is a liquid at 20° C. and has a molecular weight in the range of 125 to 500 g/mol. The composition of the present invention provides a way to enhance film formation of coatings prepared using relatively high Tg latexes without the aid of high volatile organic content (VOC) coalescents.
    Type: Application
    Filed: April 16, 2014
    Publication date: February 9, 2017
    Applicants: The Dow Chemical Company, Dow Chemical (China) Investment Company Limited
    Inventors: Steven Arturo, Selvanathan Arumugam, Kebede Beshah, David Conner, John Ell, Ralph C. Even, Fujun Lu, Bo Lu, Brandon Rowe, Justin Sparks, Jianping Xu, Jiguang Zhang
  • Publication number: 20160208126
    Abstract: A process to produce a dispersion comprising feeding ethylcellulose polymer and a dispersant into a melt and mix zone of an extruder wherein the ethylcellulose polymer and dispersant are melted and mixed together to form a melt; conveying the melt to an emulsification zone of the extruder in which the temperature and pressure are controlled; feeding a base and water into the emulsification zone wherein the melt is dispersed to form a high internal phase emulsion; conveying the emulsion to a dilution and cooling zone of the extruder; and feeding water into the dilution and cooling zone to dilute the high internal phase emulsion thereby forming an aqueous dispersion is provided.
    Type: Application
    Filed: August 25, 2014
    Publication date: July 21, 2016
    Inventors: True L. ROGERS, Aslin IZMITLI, Susan L. JORDAN, David L. MALOTKY, Shari L. WORKENTINE, Kebede BESHAH
  • Publication number: 20160177081
    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: December 15, 2015
    Publication date: June 23, 2016
    Inventors: James C. Bohling, Kebede Beshah, Pu Luo