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).

  • 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
  • Publication number: 20160160016
    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: Application
    Filed: November 23, 2015
    Publication date: June 9, 2016
    Applicants: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Richard A. Lundgard, Partha S. Majumdar, David L. Malotky, Jodi M. Mecca, Edwin Nungesser
  • Patent number: 9155549
    Abstract: The present invention relates to a composition comprising an aqueous dispersion of a film-forming polymer, spherical polymer beads, a HASE rheology modifier, and optionally a pigment. The composition is useful in coatings compositions.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: October 13, 2015
    Assignee: Dow Global Technologies LLC
    Inventors: Adam Fasula, Kenneth Lennon, Partha S. Majumdar, Edwin Hugh Nungesser
  • Publication number: 20150197659
    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: Application
    Filed: September 18, 2013
    Publication date: July 16, 2015
    Inventors: Nader N. Kamel, Edward La Fleur, Partha S. Majumdar, Edwin Hugh Nungesser
  • Publication number: 20150184016
    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: Application
    Filed: September 18, 2013
    Publication date: July 2, 2015
    Inventors: Edward La Fleur, Partha S. Majumdar, Edwin Hugh Nungesser
  • Patent number: 9006320
    Abstract: The present invention relates to a composition comprising an aqueous dispersion of a binder and a salt of the following fluoroalkyl phosphate: where n, p, q, R1, and R2 are defined herein. The composition of the present invention is useful as a block additive in paint formulations.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: April 14, 2015
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Scott A. Ibbitson, Arkady L. Krasovskiy, Partha S. Majumdar, Mark R. Winkle
  • Patent number: 9000078
    Abstract: The present invention is a composition comprising an aqueous dispersion of a binder and a salt of the following fluoroalkyl phosphonic acid: wherein n, q, and p are as described herein. The composition of the present invention is useful as a block additive in coating compositions.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: April 7, 2015
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Andrew Hejl, Arkady L. Krasovskiy, Partha S. Majumdar, Mark R. Winkle
  • Publication number: 20140235772
    Abstract: The present invention relates to a composition comprising an aqueous dispersion of a binder and a salt of the following fluoroalkyl phosphate: where n, p, q, R1, and R2 are defined herein. The composition of the present invention is useful as a block additive in paint formulations.
    Type: Application
    Filed: February 12, 2014
    Publication date: August 21, 2014
    Inventors: Scott A. Ibbitson, Arkady L. Krasovskiy, Partha S. Majumdar, Mark R. Winkle
  • Publication number: 20140114012
    Abstract: The present invention relates to a composition comprising an aqueous dispersion of a film-forming polymer, spherical polymer beads, a HASE rheology modifier, and optionally a pigment. The composition is useful in coatings compositions.
    Type: Application
    Filed: September 30, 2013
    Publication date: April 24, 2014
    Inventors: Adam Fasula, Kenneth Lennon, Partha S. Majumdar, Edwin Hugh Nungesser
  • Publication number: 20140107267
    Abstract: The present invention is a composition comprising an aqueous dispersion of a binder and a salt of the following fluoroalkyl phosphonic acid: wherein n, q, and p are as described herein. The composition of the present invention is useful as a block additive in coating compositions.
    Type: Application
    Filed: October 14, 2013
    Publication date: April 17, 2014
    Inventors: Andrew Hejl, Arkady L. Krasovskiy, Partha S. Majumdar, Mark R. Winkle
  • Patent number: 8062729
    Abstract: A polymeric material may be prepared by reacting a composition that includes polyol, polyisocyanate, and polyorganosiloxane having functional groups capable of reacting with the polyisocyanate, wherein the polymeric material has a surface which includes raised microdomains.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: November 22, 2011
    Assignee: NDSU Research Foundation
    Inventors: Dean C. Webster, Partha S. Majumdar