Patents by Inventor Partha S. Majumdar

Partha S. Majumdar 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: 10913867
    Abstract: The present invention relates to a matte coating composition comprising an aqueous dispersion of a) polymer particles having an average particle size in the range of from 80 nm to 500 nm; b) polymeric organic crosslinked microspheres having a particle size in the range of from 1 ?m to 20 ?m; c) polyethylene wax particles having a particle size in the range of from 0.3 ?m to 30 ?m; and d) a rheology modifier. The composition of the present invention gives matte finish coatings with excellent burnish resistance.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: February 9, 2021
    Assignee: Rohm and Haas Company
    Inventors: James C. Bohling, Ibrahim Eryazici, Philip R. Harsh, Christopher Kozak, Partha S. Majumdar, Edwin Aloysius Nungesser, Jr., Andrew Swartz
  • Patent number: 10865276
    Abstract: The present invention relates to composition comprising an aqueous dispersion of microspheres and a class of a nonionic polyalkylene oxide of a distyryl or tristyryl phenol or an anionic polyalkylene oxide salt of a distyryl or tristyryl phenol and a process for preparing the composition. The microspheres have an average particle size in the range of from 1 ?m to 25 ?m, as well as a low coefficient of variation and low gel concentration; the composition is useful in coatings applications, especially where a matte finish is desired.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: December 15, 2020
    Assignee: Rohm and Haas Company
    Inventors: James C. Bohling, Ibrahim Eryazici, Philip R. Harsh, Partha S. Majumdar, Edwin A. Nungesser
  • Publication number: 20200283572
    Abstract: The present invention relates to composition comprising an aqueous dispersion of microspheres and a class of a nonionic polyalkylene oxide of a distyryl or tristyryl phenol or an anionic polyalkylene oxide salt of a distyryl or tristyryl phenol and a process for preparing the composition. The microspheres have an average particle size in the range of from 1 ?m to 25 ?m, as well as a low coefficient of variation and low gel concentration; the composition is useful in coatings applications, especially where a matte finish is desired.
    Type: Application
    Filed: May 13, 2020
    Publication date: September 10, 2020
    Inventors: James C. Bohling, Ibrahim Eryazici, Philip R. Harsh, Partha S. Majumdar, Edwin A. Nungesser
  • Patent number: 10723838
    Abstract: The present invention relates to composition comprising an aqueous dispersion of microspheres and a class of a nonionic polyalkylene oxide of a distyryl or tristyryl phenol or an anionic polyalkylene oxide salt of a distyryl or tristyryl phenol and a process for preparing the composition. The microspheres have an average particle size in the range of from 1 ?m to 25 ?m, as well as a low coefficient of variation and low gel concentration; the composition is useful in coatings applications, especially where a matte finish is desired.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: July 28, 2020
    Assignee: Rohm and Haas Company
    Inventors: James C. Bohling, Ibrahim Eryazici, Philip R. Harsh, Partha S. Majumdar, Edwin Nungesser
  • 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
  • Patent number: 10508213
    Abstract: The present invention relates to a composition comprising an aqueous dispersion of polymer particles and crosslinked polymer beads that are each functionalized with keto groups, and a diamine or dihydrazide crosslinking agent. The dispersions of the present invention are useful in coatings applications.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: December 17, 2019
    Assignee: Rohm and Haas Company
    Inventors: David M. Conner, Joy A. Gallagher, Philip R. Harsh, Partha S. Majumdar, Edwin Nungesser
  • 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
  • Publication number: 20190185687
    Abstract: The present invention relates to a matte coating composition comprising an aqueous dispersion of a) polymer particles having an average particle size in the range of from 80 nm to 500 nm; b) polymeric organic crosslinked microspheres having a particle size in the range of from 1 ?m to 20 ?m; c) polyethylene wax particles having a particle size in the range of from 0.3 ?m to 30 ?m; and d) a rheology modifier. The composition of the present invention gives matte finish coatings with excellent burnish resistance.
    Type: Application
    Filed: December 10, 2018
    Publication date: June 20, 2019
    Inventors: James C. Bohling, Ibrahim Eryazici, Philip R. Harsh, Christopher Kozak, Partha S. Majumdar, Edwin Aloysius Nungesser, JR., Andrew Swartz
  • Publication number: 20190177554
    Abstract: The present invention relates to a pigmented matte coating composition comprising an aqueous dispersion of a) phosphorus acid functionalized polymer particles; b) TiO2 particles; c) polymeric organic microspheres; and d) a rheology modifier. The composition of the present invention gives matte finish coatings having the stain and scrub resistant attributes similar to coatings formed from semi-gloss paint compositions.
    Type: Application
    Filed: December 10, 2018
    Publication date: June 13, 2019
    Inventors: James C. Bohling, Ibrahim Eryazici, Philip R. Harsh, Partha S. Majumdar, Edwin Aloysius Nungesser, JR., Qing Zhang
  • Publication number: 20190071540
    Abstract: The present invention relates to composition comprising an aqueous dispersion of microspheres and a class of a nonionic polyalkylene oxide of a distyryl or tristyryl phenol or an anionic polyalkylene oxide salt of a distyryl or tristyryl phenol and a process for preparing the composition. The microspheres have an average particle size in the range of from 1 ?m to 25 ?m, as well as a low coefficient of variation and low gel concentration; the composition is useful in coatings applications, especially where a matte finish is desired.
    Type: Application
    Filed: August 29, 2018
    Publication date: March 7, 2019
    Inventors: 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: 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
  • 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: 20180072913
    Abstract: The present invention relates to a composition comprising an aqueous dispersion of polymer particles and crosslinked polymer beads that are each functionalized with keto groups, and a diamine or dihydrazide crosslinking agent. The dispersions of the present invention are useful in coatings applications.
    Type: Application
    Filed: August 31, 2017
    Publication date: March 15, 2018
    Inventors: David M. Conner, Joy A. Gallagher, Philip R. Harsh, Partha S. Majumdar, Edwin Nungesser
  • 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: 9856369
    Abstract: The present invention relates to a composition comprising an aqueous dispersion of spheroidal particles having a mode particle size of from 10 to 30 ?m. The spheroidal particles are useful as organic extenders, especially in below-critical pigmented coatings formulations, and provide coatings with improved stain removal properties.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: January 2, 2018
    Assignees: Rohm and Haas Company, Dow Global Technologies LLC
    Inventors: Richard A. Lundgard, Partha S. Majumdar, David L. Malotky, Jodi M. Mecca, Edwin Nungesser
  • Patent number: 9645289
    Abstract: Provided is an article having a condition-dependent image, said article comprising (a) a substrate having a surface, (b) upon the surface of the substrate, one or more layers of a clear coating comprising a plurality of beads. Also provided are a method of producing such an article and a method of observing the image on such an article.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: May 9, 2017
    Assignee: ROHM AND HAAS COMPANY
    Inventors: Edwin Hugh Nungesser, Edward La Fleur, Adam Fasula, Partha S. Majumdar
  • Patent number: 9458347
    Abstract: An aqueous coating composition including: certain first solid polymeric particles having an average diameter of 0.60-0.99 ?m and certain second solid polymeric particles having a calculated Tg of from ?60° C. to 120° C. and an average particle diameter of from 50 nm to 500 nm; wherein the dry weight ratio of the first solid polymeric particles to the second solid polymeric particles is from 0.15:1 to 10:1; and the aqueous coating composition includes less than 10% by volume, inorganic extender particles is provided. Also provided is a coating having a ratio of 85° specular gloss to 20° specular gloss equal to or greater than 33 formed from the aqueous coating composition.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: October 4, 2016
    Assignee: Rohm and Haas Company
    Inventors: Edward La Fleur, Partha S. Majumdar, Edwin Hugh Nungesser
  • Patent number: 9410053
    Abstract: Provided is an aqueous coating composition including: particular amounts of certain first solid polymeric particles having an average diameter of 0.60-0.99 ?m; certain second solid polymeric particles having an average diameter of 2-20 ?m, and mixtures thereof; and, third solid polymeric particles having a calculated Tg of from ?60 C to 120° C. and an average particle diameter of from 50 nm to 500 nm; wherein the second solid polymeric particles have a K10 value of less than 1.9E+10 N/m2; wherein the difference between the refractive index of the outer surface of the second solid polymeric particles and the refractive index of the third solid polymeric particles is between 10E-4 to 10E-2; and wherein the aqueous coating composition comprises less than 10% by volume, inorganic extender particles. A method for providing a coating from the aqueous coating composition and a low glare coating so formed are also provided.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: August 9, 2016
    Assignee: ROHM AND HAAS COMPANY
    Inventors: Nader N. Kamel, Edward La Fleur, Partha S. Majumdar, Edwin Hugh Nungesser
  • Publication number: 20160216415
    Abstract: Provided is an article having a condition-dependent image, said article comprising (a) a substrate having a surface, (b) upon the surface of the substrate, one or more layers of a clear coating comprising a plurality of beads. Also provided are a method of producing such an article and a method of observing the image on such an article.
    Type: Application
    Filed: September 24, 2014
    Publication date: July 28, 2016
    Applicant: Rohm and Haas Company
    Inventors: Edwin Hugh Nungesser, Edward La Fleur, Adam Fasula, Partha S. Majumdar