Patents by Inventor Umesh C. Desai

Umesh C. Desai 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: 20140299270
    Abstract: Disclosed herein are adhesive compositions comprising (a) a first component; (b) a second component that chemically reacts with said first component; and (c) graphenic carbon particles having an oxygen content of no more than 2 atomic weight percent. Disclosed herein are associated methods for forming the adhesive compositions and applying the adhesive compositions to a substrate to form a bonded substrate.
    Type: Application
    Filed: June 24, 2014
    Publication date: October 9, 2014
    Inventors: David B. Asay, Tien-Chieh Chao, Umesh C. Desai, Cheng-Hung Hung, Masayuki Nakajima, Noel R. Vanier
  • Patent number: 8840962
    Abstract: The present invention is directed to a coating composition comprising: (i) an aqueous dispersion of polymeric particles; (ii) a polyether carbamate compound; (iii) a filler material; and (iv) an microparticle; and wherein after application to a substrate and after curing, the cured coating composition demonstrates a composite damping Loss Factor of 0.05 or greater at a frequency ranging from 100 to 6,300 Hz and comprises a surface that is substantially free of defects.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: September 23, 2014
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Umesh C. Desai, Shanti Swarup, Kaliappa G. Ragunathan, Paul Pcolinsky
  • Patent number: 8796361
    Abstract: Disclosed herein are adhesive compositions comprising (a) a first component; (b) a second component that chemically reacts with said first component; and (c) graphenic carbon particles having a compressed density of 0.9 or less. Disclosed herein are associated methods for forming the adhesive compositions and applying the adhesive compositions to a substrate to form a bonded substrate.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: August 5, 2014
    Assignee: PPG Industries Ohio, Inc.
    Inventors: David B. Asay, Tien-Chieh Chao, Umesh C. Desai, Cheng-Hung Hung, Masayuki Nakajima, Noel Vanier
  • Publication number: 20140150970
    Abstract: Disclosed herein are compositions including (a) a first component comprising (1) an epoxy-adduct that is the reaction product of reactants comprising a first epoxy compound, a polyol, and an anhydride and/or a diacid and (2) a second epoxy compound; (b) rubber particles having a core/shell structure and/or graphenic carbon particles; and (c) a second component that chemically reacts with the first component at ambient or slightly thermal conditions. Also disclosed herein are compositions including (a) an epoxy-capped flexibilizer; (b) a heat-activated latent curing agent; and optionally (c) rubber particles having a core/shell structure and/or graphenic carbon particles; (d) an epoxy/CTBN adduct; and/or (e) an epoxy/dimer acid adduct. The heat-activated latent curing agent may include at least one reaction product of reactants including an epoxy compound and an amine and/or an alkaloid.
    Type: Application
    Filed: June 14, 2013
    Publication date: June 5, 2014
    Inventors: Umesh C. Desai, Tien-Chieh Chao, Masayuki Nakajima, Kaliappa G. Ragunathan
  • Patent number: 8440746
    Abstract: Curable, one-package, stable adhesive compositions are provided comprising: (a) a resin component comprising a polyepoxide, (b) a polyamine having at least two primary amine, secondary amine, and/or ketimine functional groups; and (c) a curing component comprising dicyandiamide and an accelerator. At least a portion of the polyepoxide in the resin component is reacted with carboxy-terminated butadiene acrylonitrile polymer. The accelerator comprises a reaction product comprising a renewable polyol, a diisocyanate, and a dialkyl monoamine containing alkyl groups with at least two carbon atoms each. The compositions are suitable for use as adhesive compositions over a wide temperature range.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: May 14, 2013
    Assignee: PPG Industries Ohio, Inc
    Inventors: Shanti Swarup, Masayuki Nakajima, Umesh C. Desai, Tien-Chieh Chao, Charles M. Kania, Britt Minch
  • Publication number: 20120211160
    Abstract: Disclosed herein are adhesive compositions comprising (a) a first component; (b) a second component that chemically reacts with said first component; and (c) graphenic carbon particles having a compressed density of 0.9 or less. Disclosed herein are associated methods for forming the adhesive compositions and applying the adhesive compositions to a substrate to form a bonded substrate.
    Type: Application
    Filed: May 3, 2012
    Publication date: August 23, 2012
    Applicant: PPG Industries Ohio, Inc.
    Inventors: David B. Asay, Tien-Chieh Chao, Umesh C. Desai, Cheng-Hung Hung, Masayuki Nakajima, Noel Vanier
  • Publication number: 20120142817
    Abstract: Curable, one-package, stable adhesive compositions are provided comprising: (a) a resin component comprising a polyepoxide, (b) a polyamine having at least two primary amine, secondary amine, and/or ketimine functional groups; and (c) a curing component comprising dicyandiamide and an accelerator. At least a portion of the polyepoxide in the resin component is reacted with carboxy-terminated butadiene acrylonitrile polymer. The accelerator comprises a reaction product comprising a renewable polyol, a diisocyanate, and a dialkyl monoamine containing alkyl groups with at least two carbon atoms each. The compositions are suitable for use as adhesive compositions over a wide temperature range.
    Type: Application
    Filed: December 2, 2010
    Publication date: June 7, 2012
    Applicant: PPG Industries Ohio, Inc.
    Inventors: Shanti Swarup, Masayuki Nakajima, Umesh C. Desai, Tien-Chieh Chao, Charles M. Kania, Britt Minch
  • 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: 20120129980
    Abstract: Disclosed herein are compositions including (a) a first component comprising (1) an epoxy-adduct that is the reaction product of reactants comprising a first epoxy compound, a polyol, and an anhydride and/or a diacid and (2) a second epoxy compound; (b) rubber particles having a core/shell structure and/or graphenic carbon particles; and (c) a second component that chemically reacts with the first component at ambient or slightly thermal conditions. Also disclosed herein are compositions including (a) an epoxy-capped flexibilizer; (b) a heat-activated latent curing agent; and optionally (c) rubber particles having a core/shell structure and/or graphenic carbon particles; (d) an epoxy/CTBN adduct; and/or (e) an epoxy/dimer acid adduct.
    Type: Application
    Filed: December 9, 2011
    Publication date: May 24, 2012
    Applicant: PPG Industries Ohio, Inc.
    Inventors: Umesh C. Desai, Tien-Chieh Chao, Masayuki Nakajima, Kaliappa G. Ragunathan
  • Publication number: 20110281978
    Abstract: The present invention is directed to a coating composition comprising: (i) an aqueous dispersion of polymeric particles; (ii) a polyether carbamate compound; (iii) a filler material; and (iv) an inorganic microparticle; and wherein after application to a substrate and after curing, the cured coating composition demonstrates a composite damping Loss Factor of 0.05 or greater at a frequency ranging from 100 to 6,300 Hz and comprises a surface that is substantially free of defects.
    Type: Application
    Filed: May 14, 2010
    Publication date: November 17, 2011
    Inventors: Umesh C. Desai, Shanti Swarup, Kaliappa G. Ragunathan, Paul Pcolinsky
  • Publication number: 20110037013
    Abstract: Coatings comprising a latex particle comprising the reaction product of itaconic acid/anhydride and a monoalcohol, a monoepoxide, a monoamine or mixtures thereof are disclosed. Methods for using such coatings, particularly for inhibiting sound and/or vibration transmission through a substrate, are also disclosed.
    Type: Application
    Filed: August 14, 2009
    Publication date: February 17, 2011
    Applicant: PPG Industries Ohio, Inc.
    Inventors: Kaliappa G. Ragunathan, David R. Fenn, Umesh C. Desai, Gregory J. McCollum, Anthony Palermo
  • Publication number: 20100258371
    Abstract: A heat reflective system in which a curable composition is deposited and cured onto a substrate, wherein the curable composition comprises: (a) a resinous binder comprising a polyamideimide, a polyepoxide and/or a polysiloxane; and (b) a metallic reflective pigment. After application to a surface of a substrate and after curing, when the coated surface is exposed to a heat source having a temperature up to 390° C. at a distance of at least ½ inch (1.27 cm), the reverse side of the substrate is at least 20 Celsius degrees lower than the temperature of the reverse side of a similar substrate without the curable film-forming composition.
    Type: Application
    Filed: June 28, 2010
    Publication date: October 14, 2010
    Inventor: Umesh C. Desai
  • Patent number: 7763350
    Abstract: A coated article comprising (a) a substrate having two opposing surfaces; (b) a first curable film-forming composition applied to one surface of the substrate; and (c) a second curable film-forming composition applied to the opposing surface of the substrate, wherein the opposing surface is not coated with the first curable film-forming composition. Component (b) comprises a resinous binder; optionally, a curing agent and a metallic reflective pigment while component (c) comprises a polyepoxide; a thermoplastic polyester polymer; a curing agent a mineral filler; and microspheres.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: July 27, 2010
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Umesh C. Desai, Ion Pelinescu
  • Publication number: 20100004353
    Abstract: Curable compositions are provided comprising: (a) a resinous binder comprising a polyamideimide, a polyepoxide and/or a polysiloxane; (b) optionally, a curing agent having functional groups reactive with functional groups on the resinous binder in (a); and (c) a metallic reflective pigment. After application to a surface of a substrate and after curing, when the coated surface is exposed to a heat source having a temperature up to 390° C. at a distance of at least ½ inch (1.27 cm), the reverse side of the substrate is at least 20 Celsius degrees lower than the temperature of the reverse side of a similar substrate without the curable film-forming composition.
    Type: Application
    Filed: July 1, 2008
    Publication date: January 7, 2010
    Applicant: PPG INDUSTRIES OHIO, INC.
    Inventor: Umesh C. Desai
  • Publication number: 20100003506
    Abstract: Coated articles are provided comprising: (a) a substrate having two opposing surfaces; (b) a first curable film-forming composition applied to one surface of the substrate, the first curable film-forming composition comprising: (i) a resinous binder comprising a polyepoxide, a polyamideimide, a polyimide, and/or a polysiloxane; (ii) optionally, a curing agent having functional groups reactive with functional groups on the resinous binder in (a); and (iii) a metallic reflective pigment; and (c) a second curable film-forming composition applied to the opposing surface of the substrate, the second curable film-forming composition comprising: (i) a polyepoxide containing at least two epoxide groups per molecule; (ii) a thermoplastic polyester polymer; (iii) a curing agent having functional groups reactive with the epoxide groups in (c)(i); (iv) a mineral filler; and (v) microspheres comprising expandable microspheres and/or hollow microspheres.
    Type: Application
    Filed: July 1, 2008
    Publication date: January 7, 2010
    Applicant: PPG INDUSTRIES OHIO, INC.
    Inventors: Umesh C. Desai, Ion Pelinescu
  • Publication number: 20100004369
    Abstract: Curable compositions are provided comprising: (a) a polyepoxide containing at least two epoxide groups per molecule; (b) a thermoplastic polyester polymer; (c) a curing agent having functional groups reactive with the epoxide groups in (a); and (d) microspheres comprising expandable microspheres which expand during curing of the composition and/or hollow microspheres. In certain embodiments, the compositions further comprise mineral fillers. Upon curing, the density of the cured compositions with expanded microspheres is less than half of the density of the composition before curing. Cured compositions of the present invention provide improved vibration damping properties at elevated temperatures, making them suitable as fillers for engine blade cavities.
    Type: Application
    Filed: July 1, 2008
    Publication date: January 7, 2010
    Applicant: PPG INDUSTRIES OHIO, INC.
    Inventors: Umesh C. Desai, Ion Pelinescu
  • Publication number: 20080039564
    Abstract: An aqueous coating composition exhibiting sound dampening properties is disclosed. The coating composition comprises an aqueous dispersion of polymeric microparticles, a filler and at least two different plasticizers.
    Type: Application
    Filed: August 11, 2006
    Publication date: February 14, 2008
    Inventors: Umesh C. Desai, Tien-Chieh Chao, Anthony C. Palermo
  • Patent number: 7288290
    Abstract: A process is provided for applying multi-component composite coating compositions to substrates to provide sound damping and print-through resistance. The process includes applying at least one first coating composition to a surface of the substrate; applying at least one second coating composition over the first; and curing one or both of the first and second compositions, thereby forming a multi-layered coated substrate. The coating compositions may be applied by a method selected from spraying, extruding, brushing, and/or dipping.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: October 30, 2007
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Tien-Chieh Chao, Umesh C. Desai, Marvis E. Hartman, Klaus Heinicke, Kaliappa G. Ragunthan
  • Patent number: 7217746
    Abstract: Coating materials comprising polymeric particles in a geometrically ordered array are disclosed. The particles can be formed from materials having different glass transition temperatures; this allows for phase segregation between areas of different glass transition temperatures within each particle. Typically, at least 50 percent of the particles will form a hexagonal array, capable of exhibiting Bragg diffraction. Because the particles within the array do not coalesce to any appreciable extent, significant surface area is provided by the present coating materials. Thus, the present materials have particularly good sound deadening properties. Substrates coated with the present materials are also disclosed, as are methods for inhibiting sound transmission through a substrate using these coatings.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: May 15, 2007
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Calum H. Munro, Charles M. Kania, Umesh C. Desai
  • Patent number: 6939432
    Abstract: The present invention provides an aqueous adhesive composition including a resinous phase dispersed in an aqueous medium, the resinous phase containing (a) a polychloroprene, (b) optionally, a halogenated polyolefin different from (a), and (c) optionally, an aminoplast resin. Further provided is an aqueous adhesive composition of a resinous phase dispersed in an aqueous medium wherein the resinous phase includes (a) a polychloroprene, (b) a halogenated polyolefin different from (a), and (c) a polyurethane polymer having ionic salt groups. A multi-layer composite and methods for adhering a thermoplastic material to a rigid substrate using the aqueous adhesive compositions also are provided.
    Type: Grant
    Filed: August 23, 2002
    Date of Patent: September 6, 2005
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Tien-Chieh Chao, Umesh C. Desai, Charles M. Kania, Masayuki Nakajima, Kaliappa G. Ragunathan