Patents by Inventor Anilkumar Raghavanpillai

Anilkumar Raghavanpillai 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: 8383716
    Abstract: Polyester nanocomposite compositions contain silica nanoparticles that have been subjected to surface treatment with novel trialkoxysilane compositions. The novel silane compositions are prepared by reacting a 3-isocyanatopropyl trialkoxysilane with 1,3-propanediol or certain polyether diols. The silica nanoparticles exhibit improved dispersion in the polyester. This leads to haze reduction and improvements in mechanical properties.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: February 26, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Changzai Chi, Gordon Mark Cohen, Surbhi Mahajan, Anilkumar Raghavanpillai
  • Publication number: 20120309854
    Abstract: Compositions comprising compounds having an aldohexose moiety, a highly fluorinated moiety, and a nitrogen-containing functional group linking the moieties together are disclosed. The aldohexose-based fluoroadditives are effective in reducing the surface tension of water and are useful in various surfactant applications. Also disclosed are processes for making aldohexose-based fluoroadditives.
    Type: Application
    Filed: May 14, 2012
    Publication date: December 6, 2012
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: ANILKUMAR RAGHAVANPILLAI, Stefan Reinartz
  • Publication number: 20120309853
    Abstract: Compositions comprising compounds having an aldohexose moiety, a highly fluorinated moiety, and a nitrogen-containing functional group linking the moieties together are disclosed. The aldohexose-based fluoroadditives are effective in reducing the surface tension of water and are useful in various surfactant applications. Also disclosed are processes for making aldohexose-based fluoroadditives.
    Type: Application
    Filed: May 14, 2012
    Publication date: December 6, 2012
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: ANILKUMAR RAGHAVANPILLAI, Stefan Reinartz
  • Patent number: 8318877
    Abstract: A copolymer composition comprising monomers copolymerized in the following percentages by weight: (a) from about 20% to about 95% of a monomer, or mixture of monomers, of formula (I): CnF2n+1(CH2)x[(CF2CF2)y(CH2CH2)z]m-L-C(O)—C(R)?CH2??(I) wherein R is H, Cl, F or CH3, L is O, S, NH, S—(CH2)rO, S—(CH2)rNH, OC(O)NH—CH2CH2O, NHC(O)NHCH2CH2O, S—(CH2)rOC(O)NHCH2CH2O, or S(CH2)rNHC(O)NHCH2CH2O, and (b) from about 5% to about 80% of at least one of: (i) an alkyl (meth)acrylate monomer having a linear, branched or cyclic alkyl group of from about 6 to about 18 carbons; or (II) a monomer of formula (II) (R2)2N—R3—O—C(O)—C(R)?CH2??(II) wherein R is H, Cl, F or CH3, each R2 is independently a C1 to C4 alkyl; and R3 is a divalent linear or branched C1 to C4 alkylene; and wherein the nitrogen is from about 40% to 100% salinized; or (iii) a mixture thereof.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: November 27, 2012
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Weiming Qiu, Anilkumar Raghavanpillai, Peter Michael Murphy, Jessica Louise Flatter
  • Patent number: 8242312
    Abstract: The present invention comprises a compound of a compound of Formula 1 wherein Rf is a C2 to C12 perfluoroalkyl optionally interrupted by one to four moieties each independently selected from the group consisting of —CH2—, —O—, —S—, —S(O)—, and —S(O)2—; n is 1 to 6; m is 0 to 2, provided that m is less than or equal to n. X and Y are each independently O or NR, R is hydrogen or C1 to C6 alkyl; R1, and R2 are each independently C1 to C6 alkyl, optionally containing one or more oxygen atoms and may form a ring selected from the group of piperidine, pyrrolidine, and morpholine; and R3 is O?, (CH2)pC(O)O?, (CH2)pCH(OH)(CH2)SO3?, and (CH2)qSO3?; p is 1 to 4; and q is 2 to 4 which is useful as a surfactant.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: August 14, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Peter Michael Murphy, Anilkumar Raghavanpillai, Allison Mary Yake
  • Patent number: 8212064
    Abstract: An oligomer of the formula (I): CnF2n+1(CH2)x[(CF2CF2)y(CH2CH2)z]mG??(I) wherein G is an I; OH; OC(O)CH?CH2; OC(O)CCH3?CH2; OC(O)CCl?CH2; NR1H; N3; NCO; SQ wherein Q is H, alkyl, (CH2)nOH, (CH2)nNH2, (CH2)nOC(O)C(Me)=CH2, or (CH2)nNHC(O)C(Me)=CH2; SCN; COOH; SO3H; NHCOCH?CH2; NHCOC(CH3)?CH2); OC(O)NHCH2CH2OC(O)C(CH3)?CH2; or OC(O)NHCH2CH2OC(O)C(CH3)?CH2; subscript n is an integer from 1 to about 6, subscript x is an integer from 1 to about 6, subscripts y, z and m are each independently 1, 2 or 3, or a mixture thereof, the total number of carbons in said formula (I) excluding G ranges from about 8 to about 22, and a process for preparation thereof.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: July 3, 2012
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Weiming Qiu, Anilkumar Raghavanpillai, Michael Francis Vincent
  • Publication number: 20120156515
    Abstract: A stain resistant, oil and water repellent copolymer comprising a copolymer prepared from fluorinated (meth)acrylate and amine salts of (meth)acrylic acid, and a method of providing stain resistance, oil and water repellency to substrates and a treated substrate.
    Type: Application
    Filed: November 21, 2011
    Publication date: June 21, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Siddhartha Shenoy, Joel M. Pollino, Anilkumar Raghavanpillai, Brad M. Rosen, John Russell Crompton, JR.
  • Publication number: 20120157640
    Abstract: A process for producing copolymers of (meth)acrylates:(meth)acrylic acid amine complexes useful for hard surfaces having increased performance for stain resistance, oil and water repellency properties.
    Type: Application
    Filed: November 21, 2011
    Publication date: June 21, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Siddhartha Shenoy, Joel M. Pollino, Anilkumar Raghavanpillai, Brad M. Rosen, Ernest Byron Wysong
  • Publication number: 20120156417
    Abstract: A stain resistant, oil and water repellent composition comprising a copolymer prepared from fluorinated methacrylate, carbonate methacrylate, and methacrylic acid or salt thereof, a method of providing stain resistance, oil and water repellency to substrates, and a treated substrate.
    Type: Application
    Filed: November 21, 2011
    Publication date: June 21, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Joel M. Pollino, Anilkumar Raghavanpillai, Brad M. Rosen, Siddhartha Shenoy, Libby Xiaowei Hu
  • Publication number: 20120122999
    Abstract: The present invention comprises a compound of a compound of Formula 1 wherein Rf is a C2 to C12 perfluoroalkyl optionally interrupted by one to four moieties each independently selected from the group consisting of —CH2—, —O—, —S—, —S(O)—, and —S(O)2—; n is 1 to 6; m is 0 to 2, provided that m is less than or equal to n. X and Y are each independently O or NR, R is hydrogen or C1 to C6 alkyl; R1, and R2 are each independently C1 to C6 alkyl, optionally containing one or more oxygen atoms and may form a ring selected from the group of piperidine, pyrrolidine, and morpholine; and R3 is O?, (CH2)pC(O)O?, (CH2)pCH(OH)(CH2)SO3?, and (CH2)qSO3?; p is 1 to 4; and q is 2 to 4 which is useful as a surfactant.
    Type: Application
    Filed: November 12, 2010
    Publication date: May 17, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: PETER MICHAEL MURPHY, Anilkumar Raghavanpillai, Allison Mary Yake
  • Patent number: 8128711
    Abstract: A polymer having at least one carbamate linkage prepared by: (i) reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, and (b) at least one fluorinated compound selected from the formula (I): Rf(CH2)x[(CF2CF2)y(CH2CH2)z]m(R1)r—xH??(I) wherein Rf is a perfluoroalkyl group having 1 to about 6 carbon atoms; the total number of carbons in said formula (I) excluding (R1)r—XH ranges from about 8 to about 22; and (ii) optionally reacting with (c) water, a linking agent, or a mixture thereof.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: March 6, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Weiming Qiu, Yun Yang, Michael Henry Ober, Anilkumar Raghavanpillai
  • Publication number: 20120029222
    Abstract: Silica nanoparticles that have been subjected to surface treatment with novel silane compositions exhibit improved dispersion in polyester nanocomposites. The novel silane compositions are prepared by reacting a 3-isocyanatopropyl trialkoxysilane with an alcohol or diol having a divalent alkylene or alkylene-ether group, where the alcohol or diol has a formula weight less than about 5000. The surface treatment of the nanoparticles leads to improvements in mechanical properties and haze reduction in polyester nanocomposites containing them.
    Type: Application
    Filed: July 30, 2010
    Publication date: February 2, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: CHANGZAI CHI, Gordon Mark Cohen, Surbhi Mahajan, Anilkumar Raghavanpillai
  • Publication number: 20120029148
    Abstract: Polyester nanocomposite compositions contain silica nanoparticles that have been subjected to surface treatment with novel trialkoxysilane compositions. The novel silane compositions are prepared by reacting a 3-isocyanatopropyl trialkoxysilane with 1,3-propanediol or certain polyether diols. The silica nanoparticles exhibit improved dispersion in the polyester. This leads to haze reduction and improvements in mechanical properties.
    Type: Application
    Filed: July 30, 2010
    Publication date: February 2, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: CHANGZAI CHI, Gordon Mark Cohen, Surbhi Mahajan, Anilkumar Raghavanpillai
  • Publication number: 20120029221
    Abstract: Novel silane compositions have been prepared by reacting a 3-isocyanatopropyl trialkoxysilane with an alcohol or diol having a divalent alkylene or alkylene-ether group. The alcohol or diol has a formula weight less than about 5000. The compositions can be used to modify the surfaces of inorganic oxygen-containing materials, including but not limited to silica, silicates, borosilicates, aluminosilicates, days, and metal oxides. Surface treatment of silica nanoparticles with these compositions improves their improved dispersion in polyester nanocomposites.
    Type: Application
    Filed: July 30, 2010
    Publication date: February 2, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: CHANGZAI CHI, Gordon Mark Cohen, Surbhi Mahajan, Anilkumar Raghavanpillai
  • Publication number: 20120009840
    Abstract: Disclosed are certain partially fluorinated amide compounds and composite materials containing the compounds. Also disclosed are methods for making the composite materials.
    Type: Application
    Filed: September 20, 2011
    Publication date: January 12, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Keith Ward Hutchenson, Anilkumar Raghavanpillai, Stefan Reinartz
  • Patent number: 8044239
    Abstract: One aspect of the invention is a compound of formula (I) Ro-[L-(CqH2qS)pCrH2rRf]2??(I) wherein Ro is a divalent organic group having 2 to 40 carbon atoms; L is a linking group selected from —NHC(O)NH— or —C(O)NH— wherein the left side of the linking group is bonded to Ro; p is an integer of 0 or 1; q is an integer of 2 to 10; r is an integer of 1 to 10; and Rf is a linear or branched C1-C6 perfluoroalkyl group. Other aspects of the invention are a composite structure comprising a porous support and a porous nanoweb comprising fibrous structures comprised of one or more compositions of formula (I) and a method for making said composite structures.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: October 25, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith Ward Hutchenson, Anilkumar Raghavanpillai, Stefan Reinartz
  • Patent number: 8026289
    Abstract: A fluorinated polyoxyalkylene glycol diamide surfactant of formula 1 B—X—COCH2O—[—CpH2pO—]n—CH2CO—X—Ra??(1) wherein B is M or Ra, M is an ionizable hydrogen, ammonium, alkali metal, or alkaline earth metal, p is from about 2 to about 4, n is from about 5 about 43, each X is independently NR, SCH2CH2NR, SO2NRCH2CH2NR, or SO2CH2CH2NR; R is hydrogen, or a linear or branched alkyl group CbH(2b+1) wherein b is 1 to about 18, Ra is Rf(CH2CF2)d—(CgH2g)—; Rf(OCF2CF2)r—(CgH2g)—; RfOY—; Rf(CH2)h[(CF2CF2)i(CH2CH2)j]k—; Rf(CgH2g)—; or H(CcF2c)—(CgH2g)—; Y is CFHCF2O(CwH2w)—; or CF(CF3)CONH—(CgH2g)—; and each Rf is independently CcF(2c+1) wherein c is 1 to about 6.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: September 27, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Peter Michael Murphy, Anilkumar Raghavanpillai
  • Patent number: 8022107
    Abstract: A fluorinated polyoxyalkylene glycol diester surfactant of formula 1 B—X—COCH2O—[—CpH2pO—]n—CH2CO—X—Ra??(1) wherein B is M or Ra, M is an ionizable hydrogen, ammonium, alkali metal, or alkaline earth metal, p is from about 2 to about 4, n is from about 5 to about 43, X is O, S, or SCH2CH2O, Ra is Rf(CH2CF2)d—(CgH2g)—; Rf[OCF2CF2]r(CgH2g)—; Rf(CH2)h[(CF2CF2)i(CH2CH2)j]k-; or RfOY—; Y is CFHCF2O(CH2CH2O)v-(CgH2g)—; CFHCF2O(CwH2w)—; or CF(CF3)CONH—(CgH2g)—; each Rf is independently CcF(2c+1) wherein c is 1 to about 6; d is 1 to about 3; g is 1 to about 4; or 1; r is 1 to about 4; h is 1 to about 6; i, j, and k are each independently 1, 2, or 3, or a mixture thereof; provided that the total number of carbon atoms in Rf(CH2)h[(CF2CF2)i(CH2CH2)j]k— is from about 8 to about 22; v is 1 to about 4; and w is from about 2 to about 12.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: September 20, 2011
    Assignee: E.I. duPont de Nemours and Company
    Inventors: Peter Michael Murphy, Anilkumar Raghavanpillai
  • Publication number: 20110217506
    Abstract: A polymer having at least one carbamate linkage prepared by: (i) reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, and (b) at least one fluorinated compound selected from the formula (I): Rf(CH2)x[(CF2CF2)y(CH2CH2)z]m(R1)r—XH??(I) wherein Rf is a perfluoroalkyl group having 1 to about 6 carbon atoms; subscript x is 1 to about 6; subscripts y, z and m are each independently 1, 2 or 3, or a mixture thereof; subscript r is 0 or 1; the total number of carbons in said formula (I) excluding (R1)r—XH ranges from about 8 to about 22; X is —O—, —NR—, —S—, —S(CH2)tO—, or —S(CH2)tNR—; subscript t is from 1 to about 10; R is H or C1-4 alkyl; R1 is certain divalent radicals; n is 2 to 4; s is 1 to about 50; R2, R3, and R4 are each independently hydrogen or a C1-C6 alkyl group; and (ii) optionally reacting with (c) water, a linking agent, or a mixture thereof.
    Type: Application
    Filed: May 16, 2011
    Publication date: September 8, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Weiming Qiu, Yun Yang, Michael Henry Ober, Anilkumar Raghavanpillai
  • Patent number: 7968669
    Abstract: A polymer having at least one carbamate linkage prepared by: (i) reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, and (b) at least one fluorinated compound selected from the formula (I): Rf(CH2)x[(CF2CF2)y(CH2CH2)z]m(R1)r-xH??(I) wherein Rf is a perfluoroalkyl group having 1 to about 6 carbon atoms; the total number of carbons in said formula (I) excluding (R1)r-XH ranges from about 8 to about 22; and (ii) optionally reacting with (c) water, a linking agent, or a mixture thereof.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: June 28, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Weiming Qiu, Yun Yang, Michael Henry Ober, Anilkumar Raghavanpillai