Patents by Inventor Kaliappa Ragunathan

Kaliappa Ragunathan 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: 20230303819
    Abstract: The present disclosure provides multilayer particles comprising (i) a first layer comprising a first copolymer with an Mn of greater than 50,000 g/mol derived from one or more soft ethylenically-unsaturated monomers, and one or more phosphorus-containing monomer; and (ii) a second layer surrounding at least a portion of the first layer comprising a second polymer having an Mn of 500 g/mol to 50,000 g/mol, derived from one or more ethylenically-unsaturated monomer, and at least one ethylenically unsaturated acid monomer, wherein the second layer is prepared by a high temperature polymerization process. The present disclosure further provides methods of making the multilayer particles.
    Type: Application
    Filed: March 21, 2023
    Publication date: September 28, 2023
    Inventors: Kaliappa RAGUNATHAN, Timothy KLOTS
  • Publication number: 20230012924
    Abstract: Multiphase polymers comprising crosslinking monomers and polyfunctional amine are disclosed. The multiphase polymer comprises a first phase polymer having a Tg from 60° C. to 240° C., a second phase polymer having a Tg from 40° C. to 240° C., and a soft phase polymer having a Tg from -25° C. to 30° C. The crosslinking monomers include a triacrylate such as trimethylol propane triacrylate, an unsaturated alkoxysilane, and an unsaturated keto monomer reactive with the polyfunctional amine. In contrast to conventional knowledge, incorporation of trimethylolpropane triacrylate reduces the minimum film forming temperature of multiphase polymers. This unusual reduction in MFFT helps to reduce the VOC requirement to form a good film at low VOC. The other crosslinking monomers including unsaturated alkoxy silane and unsaturated keto monomer which react with the polyfunctional amine improve print resistance, block resistance and lower the tackiness of paint films.
    Type: Application
    Filed: December 14, 2020
    Publication date: January 19, 2023
    Inventor: Kaliappa RAGUNATHAN
  • Publication number: 20220363938
    Abstract: Disclosed herein are coating compositions with enhanced adhesion to a variety of different substrates. In some embodiments, the coating can comprise at least one copolymer derived from a monomer mixture that includes tert-butyl acrylate.
    Type: Application
    Filed: September 16, 2020
    Publication date: November 17, 2022
    Inventor: Kaliappa RAGUNATHAN
  • Publication number: 20150267077
    Abstract: The present invention is directed to a method for forming a composite coating on a bare, untreated metal substrate comprising: (A) applying a first, waterborne coating composition directly to a surface of the bare substrate to form a first coating; and (B) applying a second, transparent coating composition to the first coating formed in step (A) to form a secondary coating thereon and yielding a composite coating; wherein the first coating composition comprises an aqueous dispersion of polymeric microparticles having a core-shell morphology and having reactive functional groups, wherein the core of the polymeric microparticles is prepared from a monomer mixture comprising substantially hydrophobic ethylenically unsaturated monomers and wherein the shell of the polymeric microparticles comprises a polyurethane polymer containing acid functional groups and/or a polyurethane-urea polymer containing acid functional groups. Coated metal substrates prepared by this method are also provided.
    Type: Application
    Filed: March 19, 2014
    Publication date: September 24, 2015
    Applicant: PPG INDUSTRIES OHIO, INC.
    Inventors: Richard A. Janoski, SR., Paul H. Lamers, Kaliappa Ragunathan
  • Publication number: 20120214928
    Abstract: Waterborne compositions comprising an aqueous dispersion comprising a latex are disclosed. Disclosed are latexes that are the reaction product of reactants that include a ureido-functional ethylenically unsaturated compound, an ethylenically unsaturated silicone, and another ethylenically unsaturated compound. Use of such composition to treat porous substrate is also disclosed.
    Type: Application
    Filed: February 23, 2011
    Publication date: August 23, 2012
    Applicant: PPG IDUSTRIES OHIO, INC.
    Inventors: Narayan K. Raman, Robert T. Pogue, Melissa Lynn Billeck, Kaliappa Ragunathan
  • Publication number: 20120128499
    Abstract: Disclosed herein are 2K structural adhesive compositions comprising (a) a first component comprising (i) an epoxy-adduct formed as a reaction product of reactants comprising a first epoxy compound, a polyol, and an anhydride and/or a diacid; and (ii) a second epoxy compound; and (b) a second component that reacts with the first component. In one embodiment, the second component is an amine compound. These adhesives may be used to bond together substrate materials such as two half shells of wind turbine blades.
    Type: Application
    Filed: November 19, 2010
    Publication date: May 24, 2012
    Inventors: Umesh C. Desai, Tien-Chieh Chao, Masayuki Nakajima, Kaliappa Ragunathan
  • Publication number: 20080022886
    Abstract: Coating compositions are disclosed that include corrosion resisting particles such that the coating composition can exhibit corrosion resistance properties. Also disclosed are substrates at least partially coated with a coating deposited from such a composition and multi-component composite coatings, wherein at least one coating later is deposited from such a coating composition. Methods and apparatus for making ultrafine solid particles are also disclosed.
    Type: Application
    Filed: August 13, 2007
    Publication date: January 31, 2008
    Applicant: PPG INDUSTRIES OHIO, INC.
    Inventors: Kaliappa Ragunathan, John Schneider
  • Publication number: 20070275256
    Abstract: Coating compositions are disclosed that include corrosion resisting particles such that the coating composition can exhibit corrosion resistance properties. Also disclosed are substrates at least partially coated with a coating deposited from such a composition and multi-component composite coatings, wherein at least one coating later is deposited from such a coating composition. Methods and apparatus for making ultrafine solid particles are also disclosed.
    Type: Application
    Filed: August 13, 2007
    Publication date: November 29, 2007
    Applicant: PPG INDUSTRIES OHIO, INC.
    Inventors: Kaliappa Ragunathan, John Schneider
  • Publication number: 20070237902
    Abstract: Compositions comprising the reaction product of a polymer comprising a polyol, a polyisocyanate and/or a polyamine and a compound comprising a chlorendate group are disclosed. Also disclosed are methods of improving adhesion between a coating composition and a substrate by applying the adhesion promoting compositions of the present invention to the substrate.
    Type: Application
    Filed: April 10, 2006
    Publication date: October 11, 2007
    Inventors: Kaliappa Ragunathan, Robert Jennings, Bruce Connelly, Deborah Hayes, Shengkui Hu, Truman Wilt, Ronald Ambrose
  • Publication number: 20070173582
    Abstract: The present invention provides polyurethane composition including: (a) at least one polyurethane including a reaction product of components comprising: (i) at least one polyisocyanate; (ii) at least one branched polyol having 4 to 18 carbon atoms and at least 3 hydroxyl groups; and (iii) at least one diol having 2 to 18 carbon atoms; and (b) at least one reinforcement material selected from the group consisting of polymeric inorganic materials, nonpolymeric inorganic materials, polymeric organic materials, nonpolymeric organic materials, composites thereof, and combinations thereof; coatings and articles made therefrom and methods of making the same.
    Type: Application
    Filed: December 14, 2006
    Publication date: July 26, 2007
    Inventors: Thomas Rukavina, Robert Hunia, Chia-Cheng Lin, Kaliappa Ragunathan, Vidhu Nagpal
  • Publication number: 20070148354
    Abstract: Methods for improving adhesion between a coating and a substrate using compositions comprising chlorinated polyolefin and a compound comprising ethylene vinyl acetate are disclosed.
    Type: Application
    Filed: December 22, 2005
    Publication date: June 28, 2007
    Inventors: Shengkui Hu, Deborah Hayes, Kaliappa Ragunathan, Sun QiaoLi
  • Publication number: 20070149682
    Abstract: Coating compositions are disclosed that include corrosion resisting particles such that the coating composition can exhibit corrosion resistance properties. Also disclosed are substrates at least partially coated with a coating deposited from such a composition and multi-component composite coatings, wherein at least one coating later is deposited from such a coating composition. Methods and apparatus for making corrosion resisting particles are also disclosed.
    Type: Application
    Filed: December 13, 2006
    Publication date: June 28, 2007
    Inventor: Kaliappa Ragunathan
  • Publication number: 20070099002
    Abstract: Disclosed are coating compositions that include a polymer comprising silanol functional groups. Also disclosed are substrates coated with such compositions, methods for coating substrates with such compositions, and methods for imparting self cleaning properties to a substrate.
    Type: Application
    Filed: October 28, 2005
    Publication date: May 3, 2007
    Inventors: David Walters, Truman Wilt, Kaliappa Ragunathan, Brian Turner
  • Publication number: 20070048540
    Abstract: Coating compositions are disclosed that include corrosion resisting particles such that the coating composition can exhibit corrosion resistance properties. Also disclosed are substrates at least partially coated with a coating deposited from such a composition and multi-component composite coatings, wherein at least one coating later is deposited from such a coating composition. Methods and apparatus for making ultrafine solid particles are also disclosed.
    Type: Application
    Filed: March 20, 2006
    Publication date: March 1, 2007
    Inventors: Kaliappa Ragunathan, John Schneider
  • Publication number: 20050250877
    Abstract: The present invention is directed to a passivating material suitable for passivating a metal surface. The passivating material comprises a polymer which comprises (a) at least one nitro group, and/or pyridine group, and/or phenolic hydroxyl group; and (b) at least one group selected from a phosphorous-containing group and/or a carboxylic acid group, wherein the at least one phosphorous-containing group is selected from a phosphate, a phosphite, or a non-nitrogen substituted phosphonate.
    Type: Application
    Filed: May 2, 2005
    Publication date: November 10, 2005
    Inventors: Cathy Taylor, Daniel Rardon, Paul Lamers, Kaliappa Ragunathan, Shanti Swarup, Michael Hart