Patents by Inventor Rajeev Farwaha

Rajeev Farwaha 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: 10301772
    Abstract: Disclosed are improved carpet products made using certain types of coating compositions to secure carpet fibers to a carpet backing or substrates and/or to secure one or more carpet scrims or other layers to carpet backing. The coating compositions, which can be in the form of either precoating or skip coating compositions, are made from latex binder emulsions based on interpolymers emulsion polymerized from vinyl esters, ethylene, and a multifunctional cross-linking co-monomer such as an unsaturated silane. Such emulsions are also stabilized with surfactant emulsifiers but are substantially free of protective colloid stabilizers. The multifunctional co-monomer alters interpolymer molecular weight, branching and/or flow properties such that films formed from such interpolymers exhibit relatively low elongation values.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: May 28, 2019
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventors: David J. Lunsford, Rajeev Farwaha, Joerg Ludwig Schulte, Kerstin Gohr
  • Publication number: 20180072910
    Abstract: A water-based, low-emission latex paint formulation includes a vinyl acetate/ethylene (VAE) latex including a VAE resin with from 80 to 95 weight % vinyl acetate residue and from 5 to 20 weight % ethylene residue, optionally including additional monomers as well as a pigment composition including inorganic solids selected from inorganic pigments, inorganic fillers and mixtures thereof present in an amount such that the paint formulation has a pigment volume concentration (PVC) of from 25% to 85%. The formulations are suitable for eggshell and flat latex paints and exhibit surprising durability.
    Type: Application
    Filed: September 25, 2017
    Publication date: March 15, 2018
    Inventors: Elizabeth A. Poole, Rajeev Farwaha, Brett C. Beauregard, Alexander Madl, Jörg L. Schulte, Harmin Müller, Kristy Jo Beckman
  • Patent number: 9816001
    Abstract: A water-based, low-emission latex paint formulation includes a vinyl acetate/ethylene (VAE) latex including a VAE resin with from 80 to 95 weight % vinyl acetate residue and from 5 to 20 weight % ethylene residue, optionally including additional monomers as well as a pigment composition including inorganic solids selected from inorganic pigments, inorganic fillers and mixtures thereof present in an amount such that the paint formulation has a pigment volume concentration (PVC) of from 25% to 85%. The formulations are suitable for eggshell and flat latex paints and exhibit surprising durability.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: November 14, 2017
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventors: Elizabeth A. Poole, Rajeev Farwaha, Brett C. Beauregard, Alexander Madl, Jörg L. Schulte, Harmin Müller, Kristy Jo Beckman
  • Publication number: 20160115649
    Abstract: A paper product comprising a planar fibrous cellulose substrate, and a coating composition disposed on a surface of said substrate comprising an interpolymer prepared by the emulsion polymerization of (i) one or more vinyl ester monomers; (ii) ethylene; (iii) an unsaturated silane co-monomer; and (iv) one or more emulsion-stabilizing ionic co-monomers comprising one or more of unsaturated, substituted sulfonic acid, one or more of an unsaturated phosphonic acid, or an ester of one of those acids, in the presence of (v) a stabilizing system which comprises one or more anionic and/or nonionic surfactants but less than about 1 pphm of any protective colloid material; and (v) water.
    Type: Application
    Filed: September 10, 2012
    Publication date: April 28, 2016
    Applicant: CELANESE EMULSIONS GMBH
    Inventors: Yifang SHI, Rajeev FARWAHA, Yunlong ZHANG, Yi HAN, Hendrikus van BOXTEL, Gerhard BAUER, Joerg SCHULTE
  • Publication number: 20150322279
    Abstract: A latex coating composition for a carpet product comprising a first polymer formed from one or more monomers selected from the group consisting of vinyl esters of a C1-C18 alkanoic acid, ethylenically unsaturated carboxylic acids, esters of ethylenically unsaturated carboxylic acids, vinylaromatics, and vinyl halides and a second polymer formed from an ?-olefin and an ethylenically unsaturated carboxylic acid. External crosslinker may also be used in the latex coating composition. The second polymer, preferably ethylene/acrylic acid, may be present in an amount from 1 to 10 parts of the second polymer per 100 parts of the total polymer.
    Type: Application
    Filed: August 20, 2013
    Publication date: November 12, 2015
    Inventors: David Lunsford, Rajeev Farwaha, Ernest Mitchell, Rebecca Stuart
  • Publication number: 20150247053
    Abstract: Disclosed are aqueous polymer dispersions which can be used as binders in paper coating compositions. Such dispersions are made using a continuous polymerization process involving a tubular reactor with a continuous loop section and a secondary line section and comprise a polymer of polymerized copolymers (a) a vinyl ester, (b) an ethylenically unsaturated mono or di-carboxylic acid or half ester of a di-carboxylic acid, and (c) a comonomer having a multifunctional moiety.
    Type: Application
    Filed: April 23, 2013
    Publication date: September 3, 2015
    Inventors: Alexander Madl, Rajeev Farwaha, Philip Confalone, David Adams
  • Patent number: 9090793
    Abstract: Disclosed are aqueous latex-based coating compositions which comprise a blend of an ethylene-vinyl acetate emulsion copolymer component and a selected type of acrylic emulsion copolymer component. The acrylic copolymer component comprises primarily acrylate ester co-monomers or acrylic ester co-monomers and vinyl aromatic, e.g., styrene, co-monomers. The blend of these two emulsion copolymer types also contains a specific type of hydrazine-based, water-soluble cross-linking agent which can eventually react with the acrylic emulsion copolymer component. The acrylic emulsion copolymer is one which contains minor amounts of both 1) carboxy functional co-monomers such as itaconic and/or (meth)acrylic acids, and 2) keto- or aldehyde-containing co-monomers such as diacetone acrylamide. Such latex-based coating compositions can be formulated in the form of water-based paint compositions.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: July 28, 2015
    Assignee: CELANESE INTERNATIONAL CORPORATION
    Inventors: Marc Theodorus Ratering, Rajeev Farwaha, Tara Joy Hansen
  • Publication number: 20150125649
    Abstract: A latex coating composition for a carpet product comprising a first polymer formed from one or more monomers selected from the group consisting of vinyl esters of a C1-C18 alkanoic acid, ethylenically unsaturated carboxylic acids, esters of ethylenically unsaturated carboxylic acids, vinylaromatics, and vinyl halides and a second polymer formed from an ?-olefin and an ethylenically unsaturated carboxylic acid. External crosslinker may also be used in the latex coating composition. The second polymer, preferably ethylene/acrylic acid, may be present in an amount from 1 to 10 parts of the second polymer per 100 parts of the total polymer.
    Type: Application
    Filed: August 20, 2013
    Publication date: May 7, 2015
    Inventors: David Lunsford, Rajeev Farwaha, Ernest Mitchell, Rebecca Stuart
  • Publication number: 20150125711
    Abstract: Disclosed are blended latex dispersions which can be used as binders in paper coating compositions. Such latex dispersions comprise a first copolymer of a vinyl ester of an alkanoic acid having from 1 to 13 carbon atoms and ethylene; and a second copolymer of (i) styrene and butadiene, (ii) styrene, butadiene and acrylonitrile, or (iii) styrene and an acrylic monomer, wherein the first and second copolymers are colloidally dispersed in an aqueous medium comprising a surfactant. The paper coating compositions containing latex dispersion binders of this type preferably exhibit especially desirable coating strength as quantified by the Dry Pick Values which such compositions provide.
    Type: Application
    Filed: December 4, 2014
    Publication date: May 7, 2015
    Inventors: Rajeev Farwaha, Chris L. Lazaroff, Frederick F. Cazenave, III, Nancy Susan Coulson
  • Patent number: 8920920
    Abstract: Disclosed are blended latex dispersions which can be used as binders in paper coating compositions. Such latex dispersions comprise a first copolymer of a vinyl ester of an alkanoic acid having from 1 to 13 carbon atoms and ethylene; and a second copolymer of (i) styrene and butadiene, (ii) styrene, butadiene and acrylonitrile, or (iii) styrene and an acrylic monomer, wherein the first and second copolymers are colloidally dispersed in an aqueous medium comprising a surfactant. The paper coating compositions containing latex dispersion binders of this type preferably exhibit especially desirable coating strength as quantified by the Dry Pick Values which such compositions provide.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: December 30, 2014
    Assignee: Celanese International Corporation
    Inventors: Rajeev Farwaha, Chris L. Lazaroff, Frederick F. Cazenave, III, Nancy Susan Coulson
  • Patent number: 8785714
    Abstract: Disclosed herein are nonwoven fibrous structures for use as body fluid acquisition/distribution elements in personal care products. Such structures comprise natural and/or synthetic fibers wherein the fibers have been consolidated by application thereto, and by cross-linking of, a certain type of cross-linkable, vinyl acetate-ethylene (VAE) emulsion copolymer latex binder. The VAE latex binder is one which also comprises an added organic acidulant such as citric acid. Consolidation of the structures with VAE-based binders to which the organic acidulant has been added imparts to the resulting structures the ability to lower the pH of body fluids such as urine passing through the structures. This effect, in turn, provides odor control and skin care benefits to the absorbent articles, e.g., diapers and adult incontinence products, using such structures as acquisition/distribution elements.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: July 22, 2014
    Assignee: Celanese International Corporation
    Inventors: Philip Confalone, Rajeev Farwaha
  • Publication number: 20140162018
    Abstract: Disclosed are carpet products made using a first copolymer precoat adhesive to secure carpet fibers to a carpet backing or substrates in combination with a second copolymer skipcoat adhesive for securing a carpet scrim or other layer to a carpet backing. The first copolymer is a copolymer of a vinyl ester and ethylene and a cross-linking comonomer, and the second copolymer is a copolymer of styrene and butadiene. Such emulsions are stabilized with surfactant emulsifiers but are preferably substantially free of protective colloid stabilizers. The first copolymer exhibits an elongation value greater than 125% at 110° C.
    Type: Application
    Filed: December 6, 2013
    Publication date: June 12, 2014
    Applicant: Celanese Emulsions GmbH
    Inventors: David Lunsford, Rajeev Farwaha, Rebekah Stuart
  • Publication number: 20140018473
    Abstract: Disclosed are aqueous latex-based coating compositions which comprise a blend of an ethylene-vinyl acetate emulsion copolymer component and a selected type of acrylic emulsion copolymer component. The acrylic copolymer component comprises primarily acrylate ester co-monomers or acrylic ester co-monomers and vinyl aromatic, e.g., styrene, co-monomers. The blend of these two emulsion copolymer types also contains a specific type of hydrazine-based, water-soluble cross-linking agent which can eventually react with the acrylic emulsion copolymer component. The acrylic emulsion copolymer is one which contains minor amounts of both 1) carboxy functional co-monomers such as itaconic and/or (meth)acrylic acids, and 2) keto- or aldehyde-containing co-monomers such as diacetone acrylamide. Such latex-based coating compositions can be formulated in the form of water-based paint compositions.
    Type: Application
    Filed: December 17, 2010
    Publication date: January 16, 2014
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Marc Theodorus Ratering, Rajeev Farwaha, Tara Joy Hansen
  • Publication number: 20130149487
    Abstract: Disclosed are improved carpet products made using certain types of coating compositions to secure carpet fibers to a carpet backing or substrates and/or to secure one or more carpet scrims or other layers to carpet backing. The coating compositions, which can be in the form of either precoating or skip coating compositions, are made from latex binder emulsions based on interpolymers emulsion polymerized from vinyl esters, ethylene, and a multifunctional cross-linking co-monomer such as an unsaturated silane. Such emulsions are also stabilized with surfactant emulsifiers but are substantially free of protective colloid stabilizers. The multifunctional co-monomer alters interpolymer molecular weight, branching and/or flow properties such that films formed from such interpolymers exhibit relatively low elongation values.
    Type: Application
    Filed: May 3, 2011
    Publication date: June 13, 2013
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: David J. Lunsford, Rajeev Farwaha, Joerg Ludwig Schulte, Kerstin Gohr
  • Publication number: 20120220968
    Abstract: Disclosed herein are nonwoven fibrous structures for use as body fluid acquisition/distribution elements in personal care products. Such structures comprise natural and/or synthetic fibers wherein the fibers have been consolidated by application thereto, and by cross-linking of, a certain type of cross-linkable, vinyl acetate-ethylene (VAE) emulsion copolymer latex binder. The VAE latex binder is one which also comprises an added organic acidulant such as citric acid. Consolidation of the structures with VAE-based binders to which the organic acidulant has been added imparts to the resulting structures the ability to lower the pH of body fluids such as urine passing through the structures. This effect, in turn, provides odor control and skin care benefits to the absorbent articles, e.g., diapers and adult incontinence products, using such structures as acquisition/distribution elements.
    Type: Application
    Filed: February 28, 2011
    Publication date: August 30, 2012
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Philip Confalone, Rajeev Farwaha
  • Patent number: 8232345
    Abstract: A solution with a salt-sensitive polymer binder for use in fibrous webs, where the binder contains a copolymer of carboxylic acid monomer units and ethylenically unsaturated monomer units. The binder solution is prepared by emulsion-polymerizing a copolymer and then neutralizing the copolymer with base to make it water soluble. The binders provide a higher wet strength in concentrated salt solutions than in deionized water, and are particularly suitable for strengthening nonwoven fibrous webs in disposable articles such as wet-wipes, personal care products, diapers, and the like.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: July 31, 2012
    Assignee: Celanese International Corporation
    Inventors: Rajeev Farwaha, Steven P. Pauls, Sr., Pavneet S. Mumick, James L. Walker
  • Publication number: 20120021237
    Abstract: Disclosed are surfactant-stabilized latex emulsions which can be used as binders in paper coating compositions. Such latex emulsions comprise an interpolymer formed by emulsion polymerizing monomers selected from vinyl esters, e.g., vineyl acetate; ethylene; certain unsaturated mono- and di-carboxylic acid materials such as acrylic acid or maleic anhydride; and certain polyethylenically unsaturated cross-linking co-monomers such as diallyl phthalate. These latex emulsions are stabilized with surfactants which are substantially free of environmentally suspect alkyl phenol ethoxylates (APEs). The paper coating compositions containing latex emulsion binders of this type exhibit especially desirable coating strength as quantified by the Dry Pick Values (as defined herein) which such compositions provide.
    Type: Application
    Filed: July 20, 2010
    Publication date: January 26, 2012
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Philip CONFALONE, Rajeev FARWAHA, Kerstin GOHR
  • Patent number: 8088252
    Abstract: A solution with a salt-sensitive polymer binder for use in fibrous webs, where the binder contains a copolymer comprising repeat units derived from butyl acrylate, methyl methacrylate and amino functionalized alkyl acrylate or methacrylate or amino functionalized alkyl acrylamide or methacrylamide optionally including monomers such as vinyl acetate and/or vinyl acetate/ethylene. The binder solution is prepared by emulsion-polymerizing a copolymer and then neutralizing the copolymer with acid to make it water soluble. The binders are particularly suitable for strengthening nonwoven fibrous webs in disposable articles such as wet-wipes, personal care products, diapers, and the like and retain their salt-sensitivity with or without divalent metal scavengers.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: January 3, 2012
    Inventors: Rajeev Farwaha, Philip Confalone
  • Patent number: 7989545
    Abstract: A solution with a salt-sensitive polymer binder for use in fibrous webs, where the binder contains a copolymer of carboxylic acid monomer units and ethylenically unsaturated monomer units. The binder solution is prepared by emulsion-polymerizing a copolymer and then neutralizing the copolymer with base to make it water soluble. The binders provide a higher wet strength in concentrated salt solutions than in deionized water, and are particularly suitable for strengthening nonwoven fibrous webs in disposable articles such as wet-wipes, personal care products, diapers, and the like.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: August 2, 2011
    Assignee: Celanese International Corporations
    Inventors: Rajeev Farwaha, Steven P. Pauls, Sr., Pavneet S. Mumick, James L. Walker
  • Publication number: 20110146927
    Abstract: A solution with a salt-sensitive polymer binder for use in fibrous webs, where the binder contains a copolymer of carboxylic acid monomer units and ethylenically unsaturated monomer units. The binder solution is prepared by emulsion-polymerizing a copolymer and then neutralizing the copolymer with base to make it water soluble. The binders provide a higher wet strength in concentrated salt solutions than in deionized water, and are particularly suitable for strengthening nonwoven fibrous webs in disposable articles such as wet-wipes, personal care products, diapers, and the like.
    Type: Application
    Filed: February 23, 2011
    Publication date: June 23, 2011
    Inventors: Rajeev Farwaha, Steven P. Pauls, SR., Pavneet S. Mumick, James L. Walker