Patents by Inventor Hari Babu Sunkara

Hari Babu Sunkara 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: 8288324
    Abstract: Wellbore fluids containing poly(trimethylene ether)glycols are provided. The wellbore fluids can provide enhanced functionality, improved cost effectiveness, and reduced environmental impact as compared to conventional wellbore fluids.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: October 16, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventor: Hari Babu Sunkara
  • Publication number: 20120228546
    Abstract: Disclosed are blends comprising branched poly(trimethylene ether)polyols prepared from the acid catalyzed polycondensation reaction of 1,3-propanediol, and at least one triol comonomer selected from 1,1,1-tris(hydroxymethyl)ethane and 1,1,1-tris(hydroxymethyl)propane. The blends are useful in the preparation of polyurethane rigid and flexible foams.
    Type: Application
    Filed: August 29, 2011
    Publication date: September 13, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventor: Hari Babu Sunkara
  • Publication number: 20120225964
    Abstract: Disclosed is branched poly(trimethylene ether)polyols prepared from the acid catalyzed polycondensation reaction of 1,3-propanediol, and at least one triol comonomer selected from 1,1,1-tris(hydroxymethyl)ethane and 1,1,1-tris(hydroxymethyl)propane. Also disclosed is a branched poly(trimethylene ether)polyol with an equivalent hydroxyl functionality of about 2.1 to about 3.2 and a Mn of about 200 to about 6000. The polyols are useful in the preparation of polyurethane rigid and flexible foams.
    Type: Application
    Filed: August 29, 2011
    Publication date: September 6, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Gyorgyi Fenyvesi, Raja Hari Poladi, Hari Babu Sunkara
  • Publication number: 20120219805
    Abstract: The present invention is directed to a process for producing a low VOC (volatile organic compound) coating composition. The process can comprise mixing a solvent borne coating component and a low or zero VOC waterborne coating component in the presence of a low molecular weight polytrimethylene ether glycol. The present invention can be used to produce low VOC coatings for automotive original equipment manufacturing (OEM) and refinish coating applications, industrial coating applications on equipments and structures, or architectural coating applications on buildings or other structures. This disclosure is further directed to a coating composition comprising components derived from renewable resources.
    Type: Application
    Filed: February 20, 2012
    Publication date: August 30, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: AYUMU YOKOYAMA, HARI BABU SUNKARA, RAJESH GOPALAN SALIYA, KARLIS ADAMSONS
  • Patent number: 8252885
    Abstract: This invention relates to the production of poly(trimethylene carbonate) glycol via the polymerization of trimethylene carbonate employing one or more acidic ion exchange resin catalysts in the presence of a solvent. The products formed are substantially free of these catalysts.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: August 28, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Robert DiCosimo, Neville Everton Drysdale, Hari Babu Sunkara
  • Publication number: 20120208020
    Abstract: The present disclosure is directed to coalescing agent for waterborne coatings. The coalescing agent comprises low molecular weight polytrimethylene ether glycol having a Mn (number average molecular weight) in a range of from 100 to 490. This disclosure is further directed to a waterborne coating composition comprising the coalescing agent. The waterborne coating compositions can be used as interior and exterior top coats, basecoats, primers, primer surfacers and primer fillers. The waterborne coating compositions can be used as architecture coatings, automotive original equipment manufacturer (OEM) coatings, automotive refinish coatings, sports equipment coatings or any other coatings. The disclosure is particularly directed to a coating composition comprising components derived from renewable resources.
    Type: Application
    Filed: February 7, 2012
    Publication date: August 16, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Ayumu Yokoyama, Hari Babu Sunkara, Rajesh Gopalan Saliya
  • Patent number: 8226859
    Abstract: Insulation fluids comprising polytrimethylene ether glycol esters are provided. The insulation fluids can be used in electrical apparatuses.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: July 24, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Lisa C. Bates, Hari Babu Sunkara
  • Patent number: 8207372
    Abstract: Processes are provided for producing novel (meth)acrylic esters of poly(trimethylene ether) glycol. The processes include reacting poly(trimethylene ether) glycol with (meth)acrylic acid or equivalents thereof.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: June 26, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Gyorgyi Fenyvesi, Raja Hari Poladi, Hari Babu Sunkara
  • Patent number: 8198360
    Abstract: Processes and products utilizing (meth)acrylic esters of poly(trimethylene ether) glycol are provided. Products that can be made include ceramic materials, personal care products, inks, coatings, fabrics, and other articles that can be made from reaction products of (meth)acrylic ester of poly(trimethylene ether) glycol with certain monomers.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: June 12, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Gyorgyi Fenyvesi, Raja Hari Poladi, Hari Babu Sunkara
  • Patent number: 8188205
    Abstract: The present invention relates to the use of hydrotalcites as catalysts for the polymerization of unsubstituted or substituted trimethylene carbonate.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: May 29, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: David Richard Corbin, Robert DiCosimo, Neville Everton Drysdale, Hari Babu Sunkara
  • Publication number: 20120107260
    Abstract: This invention relates to deodorant compositions containing polytrimethylene ether glycol homo- and copolymers and/or polytrimethylene glycol ester(s) in a variety of physical forms. In at least one embodiment, the polytrimethylene ether glycol homo- and copolymers and/or polytrimethylene glycol ester(s) can be made from monomers (e.g., 1,3-propanediol) obtained from renewable resources, and can thus be more environmentally friendly than conventional deodorant compositions in terms of manufacture, use and disposal.
    Type: Application
    Filed: January 5, 2012
    Publication date: May 3, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Hari Babu Sunkara, Raja Hari Prasad R. Poladi
  • Patent number: 8153711
    Abstract: The present disclosure relates to a sag control composition consisting essentially of the reaction product of an amine and a polyisocyanate and polytrimethylene ether diol. The sag control composition can be used for providing further compositions that have excellent sag resistance, especially on vertical surfaces. The sag control composition can also provide compositions having a relatively lower content of organic solvent when compared to previously known sag control compositions.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: April 10, 2012
    Inventors: Ayumu Yokoyama, Rajesh Gopalan Saliya, Hari Babu Sunkara
  • Publication number: 20120077912
    Abstract: The present disclosure is directed to a polyester having renewable 1,3-propanediol. This invention is further directed to a coating composition comprising the polyester having components derived from renewable resources.
    Type: Application
    Filed: September 28, 2010
    Publication date: March 29, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Hari Babu Sunkara, Rajesh Gopalan Saliya, Ayumu Yokoyama
  • Publication number: 20120077929
    Abstract: Disclosed is aqueous polyurethane dispersion with a polyurethane having a polymeric backbone with ionic and/or ionizable functionality incorporated into the polymeric backbone. The polymeric backbone consists essentially of one or more non-ionic segments derived from a reaction product of polytrimethylene ether glycol and a diisocyanate. The manufacture of such polyurethanes is also disclosed.
    Type: Application
    Filed: April 6, 2011
    Publication date: March 29, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Hari Babu Sunkara, C. Chad Roberts, Paul A. Colose, II
  • Publication number: 20120053275
    Abstract: The present disclosure is directed to a coating composition having low molecular weight polytrimethylene ether glycol, polymers having one or more crosslinkable functional groups and a crosslinking agent having one or more crosslinking functional groups. The coating compositions can be used as interior and exterior top coats, basecoats, primers, primer surfacers and primer fillers. The disclosure is particularly directed to a coating composition comprising components derived from renewable resources.
    Type: Application
    Filed: March 14, 2011
    Publication date: March 1, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: AYUMU YOKOYAMA, Hari Babu Sunkara, Rajest Gopalan Saliya
  • Publication number: 20120053274
    Abstract: The present disclosure is directed to a high film build coating composition that is capable of producing coatings being sag-free at high coating thicknesses and good appearance. This disclosure is further directed to a coating composition comprising components derived from renewable resources.
    Type: Application
    Filed: March 14, 2011
    Publication date: March 1, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Ayumu Yokoyama, Hari Babu Sunkara, Rajesh Goplan Saliya
  • Publication number: 20120053291
    Abstract: The present disclosure is directed to a coating composition having polyester and low molecular weight polytrimethylene ether glycol. This invention is further directed to a coating composition comprising components derived from renewable resources.
    Type: Application
    Filed: March 14, 2011
    Publication date: March 1, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: RAJESH GOPALAN SALIYA, Ayumu Yokoyama, Hari Babu Sunkara
  • Publication number: 20120053277
    Abstract: The present invention is directed to a matting agent for reducing gloss of a coating. The matting agent comprises: a) a silica component; b) a polytrimethylene ether glycol; c) one or more solvents; and d) optionally, one or more polymers. This invention is further directed to a matting agent comprising components derived from renewable resources.
    Type: Application
    Filed: March 14, 2011
    Publication date: March 1, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Rajesh Gopalan Saliya, Ayumu Yokoyama, Hari Babu Sunkara
  • Patent number: 8114423
    Abstract: This invention relates to deodorant compositions containing polytrimethylene ether glycol homo- and copolymers and/or polytrimethylene glycol ester(s) in a variety of physical forms. In at least one embodiment, the polytrimethylene ether glycol homo- and copolymers and/or polytrimethylene glycol ester(s) are derived predominantly from monomers (e.g., 1,3-propanediol) obtained from renewable resources, and are thus more environmentally friendly in terms of manufacture, use and disposal.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: February 14, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Hari Babu Sunkara, Raja Hari Prasad R. Poladi
  • Publication number: 20120035317
    Abstract: The present invention relates to urea-terminated polyurethanes dispersants based on diols and polyether diols, aqueous dispersions of such polyurethanes, the manufacture of the urea terminated polyurethane dispersions and inks containing pigments and/or disperse dyes dispersed with these urea terminated polyurethane dispersants. The urea termination can have nonionic hydrophilic substituents.
    Type: Application
    Filed: December 4, 2008
    Publication date: February 9, 2012
    Inventors: C. Chad Roberts, Patrick F. McIntyre, Michael Stephen Wolfe, Xiaoqing Li, Hari Babu Sunkara