Patents by Inventor Padmanabhan Sundararaman

Padmanabhan Sundararaman 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: 7803415
    Abstract: A composition for coating food cans is disclosed. The composition comprises a polyester, an acrylic copolymer and a crosslinker; the polyester and acrylic copolymer have been compatibilized in some way, such as through graft copolymerization. Methods for compatibilizing acrylics and polyesters are also disclosed as are methods for coating cans using compositions comprising acrylic and polyesters.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: September 28, 2010
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Laura Kiefer-Liptak, John M. Dudik, Ronald R. Ambrose, Kevin C. Olson, Padmanabhan Sundararaman
  • Publication number: 20100222493
    Abstract: A composition for coating food cans is disclosed. The composition comprises a polyester, an acrylic copolymer and a crosslinker; the polyester and acrylic copolymer have been compatibilized in some way, such as through graft copolymerization. Methods for compatibilizing acrylics and polyesters are also disclosed as are methods for coating cans using compositions comprising acrylic and polyesters.
    Type: Application
    Filed: May 17, 2010
    Publication date: September 2, 2010
    Applicant: PPG Industries Ohio, Inc.
    Inventors: Laura Kiefer-Liptak, John M. Dudik, Ronald R. Ambrose, Kevin C. Olson, Padmanabhan Sundararaman
  • Patent number: 7745508
    Abstract: A composition for coating food cans is disclosed. The composition comprises a polyester, an acrylic copolymer and a crosslinker; the polyester and acrylic copolymer have been compatibilized in some way, such as through graft copolymerization. Methods for compatibilizing acrylics and polyesters are also disclosed as are methods for coating cans using compositions comprising acrylic and polyesters.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: June 29, 2010
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Laura Kiefer-Liptak, John M. Dudik, Ronald R. Ambrose, Kevin C. Olson, Padmanabhan Sundararaman
  • Publication number: 20080015302
    Abstract: A composition for coating food cans is disclosed. The composition comprises a polyester, an acrylic copolymer and a crosslinker; the polyester and acrylic copolymer have been compatibilized in some way, such as through graft copolymerization. Methods for compatibilizing acrylics and polyesters are also disclosed as are methods for coating cans using compositions comprising acrylic and polyesters.
    Type: Application
    Filed: September 27, 2007
    Publication date: January 17, 2008
    Applicant: PPG Industries Ohio, Inc.
    Inventors: Laura Kiefer-Liptak, John Dudik, Ronald Ambrose, Kevin Olson, Padmanabhan Sundararaman
  • Publication number: 20040044117
    Abstract: A composition for coating food cans is disclosed. The composition comprises a polyester, an acrylic copolymer and a crosslinker; the polyester and acrylic copolymer have been compatibilized in some way, such as through graft copolymerization. Methods for compatibilizing acrylics and polyesters are also disclosed as are methods for coating cans using compositions comprising acrylic and polyesters.
    Type: Application
    Filed: August 30, 2002
    Publication date: March 4, 2004
    Inventors: Laura Kiefer-Liptak, John M. Dudik, Ronald R. Ambrose, Kevin C. Olson, Padmanabhan Sundararaman
  • Patent number: 6200683
    Abstract: The invention pertains to compositions which can be coated onto substrates. These compositions include a combination of a resin blend comprising a first polyester resin and a second polyester resin, wherein the first polyester is different from the second polyester, an aminoplast crosslinking resin, an acid catalyst, and a urea-aldehyde resin. Films prepared from coating compositions made in accordance with the present invention having improved stain resistance. In many instances, films prepared from coating compositions made in accordance with the present invention not only have improved stain resistance, but also have low temperature flexibility.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: March 13, 2001
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Robert A. Montague, W. Scott Huffman, Jamel S. Richardson, Padmanabhan Sundararaman
  • Patent number: 6159549
    Abstract: The invention provides a novel coating composition which includes: (a) a polyester-based resin component, (b) an epoxy component, (c) a crosslinker component, (d) a catalyst component, and (e) a diluent component. The polyester-based resin component includes at least one phosphatized polyester resin; and the epoxy component includes at least one phosphatized epoxy resin. These coating compositions are particularly suitable as primers, and especially as primers for use used in conjunction with coating composition which include fluorocarbon polymers. Also provided is a method of providing a substrate with a multilayer coating system. This method includes: (a) applying at least one layer of the aforementioned novel primer onto a substrate; and (b) applying at least one layer of a second coating composition over the primed substrate of step (a).
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: December 12, 2000
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Padmanabhan Sundararaman, Jamel S. Richardson, Robert A. Montague, Trang D. Tran
  • Patent number: 6136927
    Abstract: This invention provides a novel phosphatized polymeric product which is formed by: (a) forming an amine-extended resinous composition having unreacted epoxy groups by mixing, under free-radical initiated polymerization conditions, a polymerizable, ethylenically unsaturated monomeric component and a polyepoxide component; and (b) phosphatizing at least a portion of the unreacted epoxy groups of the resinous composition. The present invention also provides novel coating compositions containing the aforedescribed polymeric product. While these novel coating compositions have a number of different uses, they are particularly useful for application to metal substrates such as can end stock since they result in a cured film which has excellent performance properties such as flexibility and extensibility, adhesion, resistance to boiling liquid pack tests and boiling water taste test results.
    Type: Grant
    Filed: September 23, 1998
    Date of Patent: October 24, 2000
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Shanti Swarup, Padmanabhan Sundararaman, John M. Dudik, Brian K. Rearick, Marie Edla Simeon
  • Patent number: 5955561
    Abstract: Novel hydroxy ester, hydroxy amide, and amide functional compounds are provided comprising the reaction product of:(a) an active ester functional material having the structure: ##STR1## wherein R.sup.1 is derived from a polyisocyanate; m is at least 2; R.sup.2 is a lower alkyl or alkoxy group; and R.sup.3 is a lower alkyl group; and(b) ammonia, a diol, or an amino functional material having the structure:R.sup.4 --NH--(R.sup.5).sub.x --(R.sup.6 OR.sup.7).sub.ywherein R.sup.4 is --H or alkanol; R.sup.5 is a polyvalent linking group comprising alkylene, alkylamino, urethane, or amido; x is 0 or 1; R.sup.6 is a divalent linking group comprising alkylene, silane, or siloxane; R.sup.7 is H or a lower alkyl; and y is 1 to 3. The compound is useful in curable film-forming compositions.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: September 21, 1999
    Assignee: PPG Industries Ohio, Inc.
    Inventor: Padmanabhan Sundararaman
  • Patent number: 5905121
    Abstract: An active ester compound having an alkoxy group is provided having the structure: wherein:R.sup.1 is derived from a polyisocyanate R.sup.1 (NCO).sub.m reacted with an active hydrogen-containing material to form the urethane group in the compound;m is an integer of at least 2; andR.sup.2 and R.sup.3 are independently alkyl groups having from 1 to 4 carbon atoms.The compound is useful as a crosslinking agent when combined with active hydrogen-containing resinous binders in curable film-forming compositions.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: May 18, 1999
    Assignee: PPG Industries, Inc.
    Inventor: Padmanabhan Sundararaman
  • Patent number: 5552475
    Abstract: Substituted polycarboxylic acids or substituted anhydrides as acidifying agents stabilize a waterborne polyester from saponification, provided: (a) the acidification is carried out to an extent sufficient to provide an acid number of at least 40 milligrams KOH per gram of polyester resin; and (b) the substitution on the polycarboxylic acid or anhydride is either an alkenyl group having at least four carbon atoms or a cyclic group in which the ring is not aromatic. The relatively high acid number renders the polyester dispersible in water without the need to rely on surfactants.
    Type: Grant
    Filed: October 4, 1993
    Date of Patent: September 3, 1996
    Assignee: PPG Industries, Inc.
    Inventors: Padmanabhan Sundararaman, Ronald R. Ambrose, Douglas R. Camp, Truman F. Wilt
  • Patent number: 5359005
    Abstract: Stable, non-gelled, one-package coating compositions capable of being cured at ambient conditions to produce durable coatings comprising at least one polymer and/or oligomer having a molecular weight of at least about 100 and bearing at least two specific aziridine moieties, at least two specific carbodiimide moieties or combinations thereof and at least one polymer and/or oligomer having a molecular weight of at least about 100 and bearing at least two covalently blocked carboxylic acid moieties. Process for coating a substrate using such compositions are also claimed.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: October 25, 1994
    Assignee: PPG Industries, Inc.
    Inventors: Charles M. Kania, Padmanabhan Sundararaman, David T. McKeough, Gregory J. McCollum, James B. O'Dwyer
  • Patent number: 5349006
    Abstract: An ungelled reaction product is prepared from a carboxylic acid group containing polymeric material and an azetidinol containing material having one azetidinol moiety per molecule. The ungelled reaction product is particularly useful as a grind vehicle for pigment grind compositions.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: September 20, 1994
    Assignee: PPG Industries, Inc.
    Inventors: Shanti Swarup, Padmanabhan Sundararaman, Gregory J. McCollum, Charles M. Kania, James A. Claar
  • Patent number: 5324789
    Abstract: An ungelled reaction product is prepared from a carboxylic acid group containing polymeric material and an azetidinol containing material having one azetidinol moiety per molecule. The ungelled reaction product is particularly useful as a grind vehicle for pigment grind compositions.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: June 28, 1994
    Assignee: PPG Industries, Inc.
    Inventors: Shanti Swarup, Padmanabhan Sundararaman, Gregory J. McCollum, Charles M. Kania, James A. Claar
  • Patent number: 5288802
    Abstract: Curable coating compositions are provided containing an amine group containing polyepoxide resin, an acetoacetate containing polyester having a weight average molecular weight of at least 1000, and a polyacrylate containing material. The amine group containing polyepoxide can be modified with a ketone and/or an aldehyde to form a ketimine and/or an aldimine containing polyepoxide. The compositions are useful as coatings, particularly as ambient or low temperature curable automotive refinish primer coatings having good corrosion resistance, adhesion to both substrate and other organic coatings, sandability and pot-life.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: February 22, 1994
    Assignee: PPG Industries, Inc.
    Inventors: David N. Walters, Cathy A. Kreutzer, Padmanabhan Sundararaman
  • Patent number: 5241001
    Abstract: Isocyanate-free coating compositions, capable of forming a durable coating under ambient conditions, are claimed comprising(A) at least one polymer, oligomer or combinations thereof selected from the group consisting of acrylic, urethane and urea polymers and oligomers having a number average molecular weight of at least about 100 and bearing at least two aziridinyl groups defined by the following structural formula: ##STR1## wherein X represents O, S, NH, NR, wherein R represents an alkyl having from one to 12 carbon atoms, or higher, or phenyl,R.sub.1 represents (CH.sub.2)m.sub.1, m.sub.1 being an integer ranging from 1 to 3 andR.sub.2 represents H, CH.sub.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: August 31, 1993
    Assignee: PPG Industries, Inc.
    Inventors: Charles M. Kania, Padmanabhan Sundararaman, Joseph M. Carney, Stephen J. Thomas
  • Patent number: 5182355
    Abstract: A polyurethane polyanhydride oligomer is disclosed as well as a process for its preparation. The process involves the following steps:(a) reacting a hydroxyl functional 2,4-dienoate ester with a polyisocyanate under conditions sufficient to react essentially all of the isocyanate groups to form a polyurethane polyene; and(b) reacting by Diels Alder addition the unsaturated double bonds of the polyurethane polyene with an unsaturated polycarboxylic acid anhydride containing material. Also disclosed is a curable composition containing hydroxyl functional material and the aforedescribed polyurethane polyanhydride oligomer.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: January 26, 1993
    Assignee: PPG Industries, Inc.
    Inventors: Jonathan T. Martz, Karl F. Schimmel, Padmanabhan Sundararaman, David N. Walters
  • Patent number: 5142019
    Abstract: An oligomer of the structure: ##STR1## wherein R.sub.1 is hydrogen, lower alkyl having 1 to 5 carbon atoms or hydroxyalkyl having 1 to 5 carbon atoms; R.sub.2 and R.sub.3 are the same or different radicals selected from hydrogen, alkyl having 1 to 5 carbon atoms or one of R.sub.2 and one of R.sub.3 radicals joined together with the carbon atom to which they are attached to form cycloalkyl; R.sub.5 is hydrogen or methyl; R.sub.6 is alkyl having 1 to 6 carbon atoms, cycloalkyl of 5 to 6 carbon atoms and hydroxyalkyl of 2 to 6 carbon atoms. The oligomers can be used as reactive components with other materials containing co-reactive functional groups selected from hydroxyl, carboxylic acid, carboxylic acid anhydride and isocyanate. Reactive compositions can be formed which are useful as resinous film formers in coating applications which can be cured without the generation of formaldehyde.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: August 25, 1992
    Assignee: PPG Industries, Inc.
    Inventors: Padmanabhan Sundararaman, Rudolf Maska, Cynthia L. Verardi
  • Patent number: 5136006
    Abstract: Carbodiimide compounds having the following structural formula are claimed: ##STR1## Z being selected from the group consisting of the following moieties: ##STR2## wherein R.sub.1 represents an alkylidene radical;R.sub.2 represents hydrogen or an alkyl radical;R.sub.3 represents an alkyl radical, an aromatic hydrocarbon moiety or a cycloaliphatic hydrocarbon moiety or substituted derivatives thereof;R.sub.4 represents an aromatic hydrocarbon moiety;R.sub.5 represents an alkyl radical; andx is an integer ranging from 1 to 6.Polymers containing moieties of at least two such carbodiimide compounds depending therefrom are also claimed and are useful in the formulation of coating compositions which harden or cure at low temperatures.
    Type: Grant
    Filed: January 8, 1992
    Date of Patent: August 4, 1992
    Assignee: PPG Industries, Inc.
    Inventors: Padmanabhan Sundararaman, James A. Claar, Charles M. Kania
  • Patent number: 5116922
    Abstract: Polymers containing one or more groups of the formula: ##STR1## where R.sub.4 is alkyl having 1 to 6 carbon atoms, cycloalkyl of 5 to 6 carbon atoms and hydroxyalkyl of 2 to 6 carbon atoms; R.sub.1 is hydrogen, alkyl having 1 to 5 carbon atoms or hydroxyalkyl having 1 to 5 carbon atoms; R.sub.2 and R.sub.3 are the same or different radicals selected from hydrogen, alkyl having 1 to 5 carbon atoms or one of the R.sub.2 and one of the R.sub.3 radicals joined together with the carbon atom to which they are attached to form cycloalkyl. The polymers can be made self-curing or can be combined with a co-reactable second material containing functional groups selected from hydroxyl, carboxylic acid, carboxylic acid anhydride and isocyanate to form curable compositions. The self-curable polymers and the curable polymer compositions are useful as resinous film formers in coating compositions which can be cured without the generation of formaldehyde.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: May 26, 1992
    Assignee: PPG Industries, Inc.
    Inventors: Padmanabhan Sundararaman, Rudolf Maska, Cynthia L. Verardi