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: 20230374332
    Abstract: The present invention relates to a method for preparing a multiplicity of containers of paint from a plurality of vessels separately containing an aqueous solution of a rheology modifier, an aqueous dispersion of a colorant, an aqueous dispersion of polymer particles, and an aqueous dispersion of organic polymeric microspheres. In another embodiment, the present invention relates to a method of dispensing a colorant or an opacifying agent or an inorganic extender into separate containers partially filled with a waterborne pre-paint mixture of rheology modifier, polymer particles, and organic polymeric microspheres. The process of the present invention provides a simple and cost-effective way of preparing a wide variety of a large quantity of contained and finished paints at point-of-sale.
    Type: Application
    Filed: June 21, 2021
    Publication date: November 23, 2023
    Inventors: James C. Bohling, Ibrahim Eryazici, Philip R. Harsh, Partha S. Majumdar, Mario G. L. Mirabelli, Edwin A. Nungesser, Teresa A. Phillips, Daniel A. Saucy
  • Publication number: 20230357585
    Abstract: The present invention relates to a composition comprising an aqueous dispersion of a) polymer particles having a z-average particle size in the range of from 80 nm to 500 nm; b) polymeric crosslinked organic microspheres having a D50 particle size in the range of from 1 ?m to 30 ?m; c); a colorant and d) a zinc or zirconium compound. The composition of the present invention is useful for reducing leaching from a coating prepared from a deep base, low sheen paint formulation.
    Type: Application
    Filed: October 19, 2021
    Publication date: November 9, 2023
    Inventors: James C. Bohling, Sarah D. Hann, Philip R. Harsh, Partha S. Majumdar, Teresa A. Phillips, Thomas W. Suder
  • Publication number: 20230312969
    Abstract: The present invention is a composition comprising an aqueous dispersion of polymer particles, polymeric organic crosslinked microspheres, and colloidal silica particles. The composition is useful in coating compositions for exterior applications to achieve a balance of excellent dirt pickup resistance and durability performance under accelerated testing conditions.
    Type: Application
    Filed: July 31, 2020
    Publication date: October 5, 2023
    Applicant: The Dow Chemical Company
    Inventors: Caifeng Wang, Jianming Xu, Kok Chiew Poh, Yuehan Hu, Tao Wang, Juan F. Callejas, Philip R. Harsh, James C. Bohling, Andrew J. Swartz, Partha S. Majumdar, Joseph Tanzer
  • Publication number: 20230250205
    Abstract: The present invention is a composition comprising an aqueous dispersion of first and second polymer particles; and polymeric organic crosslinked microspheres; wherein, the weight-to-weight ratio of second polymer particles to first polymer particles is in the range of from 50:50 to 80:20; and wherein the weight-to-weight ratio of the microspheres to the first and second polymer particles is in the range of from 3:97 to 20:80. The composition of the present invention is useful semi-gloss or satin paint formulations with excellent mar resistance.
    Type: Application
    Filed: July 16, 2021
    Publication date: August 10, 2023
    Inventors: James C. Bohling, Philip R. Harsh, Christopher Kozak, Partha S. Majumdar
  • Publication number: 20230174801
    Abstract: The present invention relates to a method for preparing a multiplicity of containers of paints or pre-paints from separate vessels containing an aqueous solution of a rheology modifier, optionally an aqueous dispersion of an opacifying pigment, an aqueous dispersion of polymer particles, and an aqueous dispersion of organic polymeric microspheres. The process of the present invention provides a simple and cost-effective way of preparing a wide variety of a large quantity of contained and finished paints at point-of-sale.
    Type: Application
    Filed: June 21, 2021
    Publication date: June 8, 2023
    Applicants: Rohm and Haas Company, Rohm and Haas Company
    Inventors: James C. Bohling, Ibrahim Eryazici, Philip R. Harsh, Partha S. Majumdar, Edwin A. Nungesser, Teresa A. Phillips, Sharon M. Vuong, Xiangyi Zhang
  • Publication number: 20230159741
    Abstract: The present invention relates to an aqueous dispersion of polymeric microspheres with a high surface Young's modulus and a relatively low core Young's modulus. The dispersion of the present invention is useful in paint formulations for providing improving hydrophobic stain resistance, for example, resistance to lipstick.
    Type: Application
    Filed: March 22, 2021
    Publication date: May 25, 2023
    Inventors: James C. Bohling, Ibrahim Eryazici, Christopher Kozak, Partha S. Majumdar, Johnpeter N. Ngunjiri
  • Publication number: 20220325124
    Abstract: The present invention relates to a composition comprising an aqueous dispersion of a) polymer particles having a z-average particle size in the range of from 50 nm to 500 nm; b) anion exchange resin particles having a D50 median particle size in the range of from 0.1 ?m to 50 ?m; and c) polymeric organic microspheres having a D50 median particle size in the range of from 1 ?m to 20 ?m, wherein the weight-to-weight ratio of polymer particles to microspheres is in the range of from 0.5:1 to 20:1. The composition of the present invention is useful for paint compositions that form matte finishes with an excellent balance of stain blocking and stain removal properties.
    Type: Application
    Filed: October 7, 2020
    Publication date: October 13, 2022
    Inventors: James C. Bohling, Philip R. Harsh, Patrick E. Hartnett, Partha S. Majumdar, Qing Zhang
  • Publication number: 20220275238
    Abstract: The present invention is a composition comprising a blend of a PVA based latex and an EA/MMA based polyacrylic latex. The composition of the present invention is useful in a paint formulation for providing a coating with superior scrub resistance over a formulation comprising a blend of a PVA based latex and a BA/MMA based polyacrylic latex.
    Type: Application
    Filed: August 4, 2020
    Publication date: September 1, 2022
    Inventors: Azize Ala, Gary Dombrowski, Catheryn L. Jackson, Partha S. Majumdar, Teresa A. Phillips, Sharon M. Vuong, Steven G. Arturo
  • Patent number: 11312868
    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: Grant
    Filed: December 10, 2018
    Date of Patent: April 26, 2022
    Assignees: Rohm and Haas Company, Dow Global Technologies, LLC.
    Inventors: James C. Bohling, Ibrahim Eryazici, Philip R. Harsh, Partha S. Majumdar, Edwin Aloysius Nungesser, Jr., Qing Zhang
  • Publication number: 20210348005
    Abstract: The present invention relates to a paint 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) polysiloxane particles having a particle size in the range of from 1 ?m to 30 ?m; d) a rheology modifier; e) an opacifying white pigment having a refractive index of >1.9; and f) less than 10 weight percent of a low Tg polyurethane. The composition of the present invention gives coatings with excellent burnish resistance.
    Type: Application
    Filed: October 22, 2019
    Publication date: November 11, 2021
    Inventors: James C. Bohling, Ibrahim Eryazici, Bradley K. Hageman, Philip R. Harsh, Yihan Liu, Partha S. Majumdar, Edwin A. Nungesser, Timothy A. Roggow, II
  • 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