Patents by Inventor David J. Castro

David J. Castro 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: 20210140110
    Abstract: Creping adhesives and processes for making and using same. In some embodiments, the creping adhesive can include a solvent, a modified polyvinyl alcohol, and a crosslinked resin. The crosslinked resin can include polyamidoamine backbones crosslinked by primary crosslinking moieties and propanediyl moieties, where the primary crosslinking moieties can be derived from a functionally symmetric crosslinker. In other embodiments, the crosslinked resin can include polyamidoamine backbones crosslinked by primary crosslinking moieties and secondary crosslinking moieties, where the primary crosslinking moieties can be derived from a first functionally symmetric crosslinker and the secondary crosslinking moieties can be derived from a second functionally symmetric crosslinker. In other embodiments, the crosslinked resin can include polyamidoamine backbones crosslinked by primary crosslinking moieties, where the primary crosslinking moieties can be derived from a functionally symmetric crosslinker.
    Type: Application
    Filed: November 6, 2020
    Publication date: May 13, 2021
    Applicant: ECOLAB USA INC.
    Inventors: Ashish Dhawan, David J. Castro, Gary S. Furman, Christopher Kaley
  • Publication number: 20210079143
    Abstract: Strengthening resins and processes for making and using same. In some embodiments, a resin mixture can include a solvent and a strengthening resin. The strengthening resin can include one or more hydrophobic monomers incorporated therein. The strengthening resin can have a chemical formula of (I). The chemical formula (I) can include: where each R2 can be derived from a hydrophobic monomer.
    Type: Application
    Filed: August 3, 2020
    Publication date: March 18, 2021
    Applicant: ECOLAB USA INC.
    Inventors: Gary S. Furman, En-Wei Lin, Mei Liu, David J. Castro, Christopher D. Kaley
  • Publication number: 20200325370
    Abstract: Methods and compositions useful in papermaking and tissuemaking applications are provided. Some embodiments of the methods and compositions include a polyaminoamide polymer functionalized with an acrylamidophenyl boronic acid and a crosslinked polyaminoamide functionalized with an acrylamidophenyl boronic acid. The methods and compositions provide useful properties for creping that include good adhesion even under excessively wet conditions, improved film uniformity, and good film durability, while maintaining good film softness and rewettability necessary for efficient runnability of the tissue machine.
    Type: Application
    Filed: June 26, 2020
    Publication date: October 15, 2020
    Applicant: ECOLAB USA INC.
    Inventors: Gary Samuel Furman, JR., David J. Castro, Christopher Kaley, Kevin McDonald, Mingli Wei
  • Patent number: 10731063
    Abstract: Methods and compositions useful in papermaking and tissuemaking applications are provided. Some embodiments of the methods and compositions comprise a polyaminoamide (“PAA”) polymer functionalized with an acrylamidophenyl boronic acid and a crosslinked polyaminoamide functionalized with an acrylamidophenyl boronic acid. The methods and compositions provide useful properties for creping that include good adhesion even under excessively wet conditions, improved film uniformity, and good film durability, while maintaining good film softness and rewettability necessary for efficient runnability of the tissue machine.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: August 4, 2020
    Assignee: ECOLAB USA INC.
    Inventors: Gary Samuel Furman, Jr., David J. Castro, Christopher Kaley, Kevin McDonald, Mingli Wei
  • Patent number: 10227731
    Abstract: The present disclosure provides for a method of preparing and using an emulsion for treating a papermaking process. The emulsion is an oil-in-water emulsion of alkenyl succinic anhydride emulsified with a polymer comprising at least one primary or secondary amine containing monomer. The method comprises adding an oil-in-water emulsion to the papermaking process; wherein the oil-in-water emulsion comprises alkenyl succinic anhydride emulsified with a polymer comprising at least one primary or secondary amine containing monomer; and wherein the oil-in-water emulsion is added in an amount sufficient to improve sizing of the paper produced by the papermaking process. The primary or secondary amine may be a secondary amine comprising diallylamine, and the polymer may be a diallylamine-acrylamide copolymer.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: March 12, 2019
    Assignee: Ecolab USA Inc.
    Inventors: Michael R. St. John, David J. Castro, Mei Liu
  • Publication number: 20180334601
    Abstract: Methods and compositions useful in papermaking and tissuemaking applications are provided. Some embodiments of the methods and compositions comprise a polyaminoamide (“PAA”) polymer functionalized with an acrylamidophenyl boronic acid and a crosslinked polyaminoamide functionalized with an acrylamidophenyl boronic acid. The methods and compositions provide useful properties for creping that include good adhesion even under excessively wet conditions, improved film uniformity, and good film durability, while maintaining good film softness and rewettability necessary for efficient runnability of the tissue machine.
    Type: Application
    Filed: May 18, 2018
    Publication date: November 22, 2018
    Applicant: Ecolab USA Inc.
    Inventors: Gary Samuel Furman, JR., David J. Castro, Christopher Kaley, Kevin McDonald, Mingli Wei
  • Patent number: 10132040
    Abstract: Methods and compositions for improving the characteristics of paper substrates are disclosed. The methods involve adding to a paper substrate an NCC-polymer. NCC-polymers have unique chemical properties which result in improvements in wet strength, dry strength and drainage retention properties of the paper substrates.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: November 20, 2018
    Assignee: ECOLAB USA INC.
    Inventors: David J. Castro, Rangarani Karnati, Shawnee M. Wilson, Weiguo Cheng, Mei Liu, Zhiyi Zhang
  • Patent number: 9840810
    Abstract: The disclosure provides methods and compositions for increasing the strength of a paper sheet. The method involves adding to the paper sheet an amine-containing polymer. The amine-containing polymer interacts with materials such as glyoxalated polyacrylamide or starch to make the paper stronger in terms including tensile strength, surface strength and bulk strength.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: December 12, 2017
    Assignee: ECOLAB USA INC.
    Inventors: David J. Castro, Robert M. Lowe, Mei Liu
  • Publication number: 20170254021
    Abstract: The disclosure provides methods and compositions for increasing the strength of a paper sheet. The method involves adding to the paper sheet an amine-containing polymer. The amine-containing polymer interacts with materials such as glyoxalated polyacrylamide or starch to make the paper stronger in terms including tensile strength, surface strength and bulk strength.
    Type: Application
    Filed: May 22, 2017
    Publication date: September 7, 2017
    Applicant: ECOLAB USA INC.
    Inventors: David J. Castro, Robert M. Lowe, Mei Liu
  • Publication number: 20170218571
    Abstract: The present disclosure provides for a method of preparing and using an emulsion for treating a papermaking process. The emulsion is an oil-in-water emulsion of alkenyl succinic anhydride emulsified with a polymer comprising at least one primary or secondary amine containing monomer. The method comprises adding an oil-in-water emulsion to the papermaking process; wherein the oil-in-water emulsion comprises alkenyl succinic anhydride emulsified with a polymer comprising at least one primary or secondary amine containing monomer; and wherein the oil-in-water emulsion is added in an amount sufficient to improve sizing of the paper produced by the papermaking process. The primary or secondary amine may be a secondary amine comprising diallylamine, and the polymer may be a diallylamine-acrylamide copolymer.
    Type: Application
    Filed: April 12, 2017
    Publication date: August 3, 2017
    Applicant: Ecolab USA Inc.
    Inventors: Michael R. St. John, David J. Castro, Mei Liu
  • Patent number: 9702086
    Abstract: The invention provides methods and compositions for increasing the strength of a paper sheet. The method involves adding to the paper sheet an amine containing polymer. The amine containing polymer interacts with materials such as GPAM or starch to make the paper stronger in terms including tensile strength, surface strength and bulk strength.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: July 11, 2017
    Assignee: ECOLAB USA INC.
    Inventors: David J. Castro, Robert M. Lowe, Mei Liu
  • Patent number: 9624623
    Abstract: The present disclosure provides for a method of preparing and using an emulsion for treating a papermaking process. The emulsion is an oil-in-water emulsion of alkenyl succinic anhydride emulsified with a polymer comprising at least one primary or secondary amine containing monomer. The method comprises adding an oil-in-water emulsion to the papermaking process; wherein the oil-in-water emulsion comprises alkenyl succinic anhydride emulsified with a polymer comprising at least one primary or secondary amine containing monomer; and wherein the oil-in-water emulsion is added in an amount sufficient to improve sizing of the paper produced by the papermaking process. The primary or secondary amine may be a secondary amine comprising diallylamine, and the polymer may be a diallylamine-acrylamide copolymer.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: April 18, 2017
    Assignee: ECOLAB USA INC.
    Inventors: Michael R. St. John, David J. Castro, Mei Liu
  • Patent number: 9611589
    Abstract: Size press formulations and methods of treating a substrate using the size press formulations. The size press formulations may include solids. The solids may include a polyaluminum chloride compound, starch, an optical brightening agent, and a salt. Suitable polyaluminum chloride compounds include phosphated polyaluminum chloride, sulfated polyaluminum chloride, polyaluminum chloride, polyaluminum silica sulfate chloride, and any combination thereof.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: April 4, 2017
    Assignee: ECOLAB USA INC.
    Inventors: David J. Castro, William Andrews, Daniel E. Schwarz
  • Patent number: 9574119
    Abstract: This invention is method of producing a creping cylinder adhesive comprising: contacting a dry form PVOH with a liquid form PVA at a temperature of less than 80° C., maintaining the PVOH and PVA at a temperature of between 90-95° C. until the PVOH is completely dissolved into a medium, and allowing the medium to cool to below 80° C.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: February 21, 2017
    Assignee: Nalco Company
    Inventors: Gary S. Furman, Jr., Mingli Wei, Christopher D. Kaley, David J. Castro, Vladimir A. Grigoriev
  • Publication number: 20160312410
    Abstract: Methods and compositions for improving the characteristics of paper substrates are disclosed. The methods involve adding to a paper substrate an NCC-polymer. NCC-polymers have unique chemical properties which result in improvements in wet strength, dry strength and drainage retention properties of the paper substrates.
    Type: Application
    Filed: July 5, 2016
    Publication date: October 27, 2016
    Applicant: ECOLAB USA INC.
    Inventors: David J. Castro, Rangarani Karnati, Shawnee M. Wilson, Weiguo Cheng, Mei Liu, Zhiyi Zhang
  • Publication number: 20160251804
    Abstract: Size press formulations and methods of treating a substrate using the size press formulations. The size press formulations may include solids. The solids may include a polyaluminum chloride compound, starch, an optical brightening agent, and a salt. Suitable polyaluminum chloride compounds include phosphated polyaluminum chloride, sulfated polyaluminum chloride, polyaluminum chloride, polyaluminum silica sulfate chloride, and any combination thereof.
    Type: Application
    Filed: May 10, 2016
    Publication date: September 1, 2016
    Applicant: ECOLAB USA INC.
    Inventors: David J. Castro, William Andrews, Daniel E. Schwarz
  • Patent number: 9365979
    Abstract: Size press formulations and methods of treating a substrate using the size press formulations. The size press formulations may include solids. The solids may include a polyaluminum chloride compound, starch, an optical brightening agent, and a salt. Suitable polyaluminum chloride compounds include phosphated polyaluminum chloride, sulfated polyaluminum chloride, polyaluminum chloride, polyaluminum silica sulfate chloride, and any combination thereof.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: June 14, 2016
    Assignee: ECOLAB USA INC.
    Inventors: David J. Castro, William Andrews, Daniel E. Schwarz
  • Publication number: 20160152878
    Abstract: This invention is method of producing a creping cylinder adhesive comprising: contacting a dry form PVOH with a liquid form PVA at a temperature of less than 80° C., maintaining the PVOH and PVA at a temperature of between 90-95° C. until the PVOH is completely dissolved into a medium, and allowing the medium to cool to below 80° C.
    Type: Application
    Filed: February 8, 2016
    Publication date: June 2, 2016
    Applicant: NALCO COMPANY
    Inventors: GARY S. FURMAN, JR., MINGLI WEI, CHRISTOPHER D. KALEY, DAVID J. CASTRO, VLADIMIR A. GRIGORIEV
  • Publication number: 20160097160
    Abstract: The invention provides methods and compositions for increasing the strength of a paper sheet. The method involves adding to the paper sheet an amine containing polymer. The amine containing polymer interacts with materials such as GPAM or starch to make the paper stronger in terms including tensile strength, surface strength and bulk strength.
    Type: Application
    Filed: October 6, 2014
    Publication date: April 7, 2016
    Applicant: ECOLAB USA INC.
    Inventors: David J. Castro, Robert M. Lowe, Mei Liu
  • Publication number: 20160060812
    Abstract: Size press formulations and methods of treating a substrate using the size press formulations. The size press formulations may include solids. The solids may include a polyaluminum chloride compound, starch, an optical brightening agent, and a salt. Suitable polyaluminum chloride compounds include phosphated polyaluminum chloride, sulfated polyaluminum chloride, polyaluminum chloride, polyaluminum silica sulfate chloride, and any combination thereof.
    Type: Application
    Filed: August 27, 2014
    Publication date: March 3, 2016
    Applicant: ECOLAB USA INC.
    Inventors: David J. Castro, William Andrews, Daniel E. Schwarz