Patents by Inventor Gamini Ananda Vedage

Gamini Ananda Vedage 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: 11603429
    Abstract: The present invention relates to a new structural class of phenalkamines, curing agent compositions comprising the phenalkamines, their use, as well as and methods of producing such phenalkamines and compositions. The phenalkamines of the present invention can be prepared by reacting cardanol with an aldehyde compound and triaminononane. These curing-agent compositions may be used to cure, harden, and/or crosslink an epoxy resin. The curing-agent compositions of this invention are of low viscosity and can be used neat or dissolved in a minimum amount of an organic solvent or diluent to effect cure of epoxy resins.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: March 14, 2023
    Assignee: Evonik Operations GmbH
    Inventors: Gauri Sankar Lal, Michael Cook, Gamini Ananda Vedage, Emmanouil Roumpelakis
  • Patent number: 11505643
    Abstract: The present invention provides benzylated triaminononane compounds, epoxy curing agent compositions comprising benzylated triaminononane compounds and methods of making such compositions. Amine-epoxy compositions and articles produced from these amine-epoxy compositions are also disclosed.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: November 22, 2022
    Assignee: Evonik Operations GmbH
    Inventors: Gamini Ananda Vedage, Michael Cook, Sudhir Ananthachar, Jamie Schneck
  • Patent number: 11472913
    Abstract: The present invention relates to an epoxy resin system containing an epoxy resin and a mono-alkylated diamine. The epoxy resin system can further contain a second amine. The present invention also relates to a method for producing an epoxy resin system comprising combining an epoxy resin with a mono-alkylated diamine. The mono-alkylated diamines of this invention enhance desirable processing and cured properties of epoxy resin compositions without the negative impact on mechanical properties in the cured product normally seen with cycloaliphatic amine-based curing agents.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: October 18, 2022
    Assignee: Evonik Operations GmbH
    Inventors: Gamini Ananda Vedage, Pritesh G. Patel, Jamie Schneck, Sebastian de Nardo, Steffen Kanzler
  • Publication number: 20210355270
    Abstract: The present invention relates to a new structural class of phenalkamines, curing agent compositions comprising the phenalkamines, their use, as well as and methods of producing such phenalkamines and compositions. The phenalkamines of the present invention can be prepared by reacting cardanol with an aldehyde compound and triaminononane. These curing-agent compositions may be used to cure, harden, and/or crosslink an epoxy resin. The curing-agent compositions of this invention are of low viscosity and can be used neat or dissolved in a minimum amount of an organic solvent or diluent to effect cure of epoxy resins.
    Type: Application
    Filed: March 29, 2019
    Publication date: November 18, 2021
    Inventors: Gauri Sankar Lal, Michael Cook, Gamini Ananda Vedage, Emmanouil Roumpelakis
  • Publication number: 20210188762
    Abstract: The present invention relates to a new method of making phenalkamines, products produced by such method, and use of such products. The method provides for phenalkamines obtained by an amine exchange reaction of a cardanol derived Mannich base with a compound with at least one alkylene or aralkylene group and at least two amino groups. These products may be used to cure, harden, and/or crosslink an epoxy resin. The curing agent compositions of this invention are of low viscosity and can be used neat or dissolved in a minimum amount of an organic solvent or diluent to effect cure of epoxy resins.
    Type: Application
    Filed: April 9, 2019
    Publication date: June 24, 2021
    Inventors: Gauri Sankar Lal, Michael Cook, Emmanouil Roumpelakis, Gamini Ananda Vedage
  • Publication number: 20210179769
    Abstract: The present invention provides benzylated triaminononane compounds, epoxy curing agent compositions comprising benzylated triaminononane compounds and methods of making such compositions. Amine-epoxy compositions and articles produced from these amine-epoxy compositions are also disclosed.
    Type: Application
    Filed: November 9, 2017
    Publication date: June 17, 2021
    Inventors: Gamini Ananda Vedage, Michael Cook, Sudhir Ananthachar, Jamie Schneck
  • Publication number: 20210054134
    Abstract: The present invention related to an epoxy curing agent comprising a first amine component and a second amine component. The present invention also relates to an epoxy resin system containing the reaction product of an epoxy resin component and an amine-based curing agent component comprising a first amine component and a second amine component. The present invention also relates to a method for producing the epoxy resin system comprising combining an epoxy resin component with an amine-based curing agent component, the amine-based curing agent component comprising a first amine component and a second amine component; and reacting the amine-based curing agent component and the epoxy resin component to form a cured epoxy resin composition. The first amine component is N-(3-aminopropyl) cyclohexylamine. The second amine component is the hydrogenated product of oligomeric structure from the 4,4?-Methylenedianiline process.
    Type: Application
    Filed: March 4, 2019
    Publication date: February 25, 2021
    Inventors: Pritesh G. Patel, Gamini Ananda Vedage, Peter Lucas, Joseph DiBiase
  • Publication number: 20210047461
    Abstract: The present invention relates to a new structural class of phenalkamines, curing agent compositions comprising the phenalkamines, their use, as well as and methods of producing such phenalkamines and compositions. The phenalkamines of the present invention can be prepared by reacting cardanol with an aldehyde compound and triaminononane. These curing-agent compositions may be used to cure, harden, and/or crosslink an epoxy resin. The curing-agent compositions of this invention are of low viscosity and can be used neat or dissolved in a minimum amount of an organic solvent or diluent to effect cure of epoxy resins.
    Type: Application
    Filed: March 29, 2019
    Publication date: February 18, 2021
    Inventors: Gauri Sankar Lal, Michael Cook, Gamini Ananda Vedage, Emmanouil Roumpelakis
  • Patent number: 10899986
    Abstract: Mannich base compositions include the reaction products of (1) an amine component including at least one multifunctional amine of structure (1): wherein each R is independently H or CH2CH2CH2NH2; R1 is H, CH2CH2CH2NH2, C1-C21 alkyl, or C2-C21 alkenyl; n is 2; and m is 1 or 2, with (2) an alkyl substituted hydroxyaromatic compound, and (3) and aldehyde. The Mannich base compositions are useful for fuel additives and other articles. Additive compositions, fuel additives, fuel compositions and methods for reducing deposit formations in a fuel system are also disclosed.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: January 26, 2021
    Assignee: Evonik Operations GmbH
    Inventors: Buford Brian Smith, Gamini Ananda Vedage
  • Patent number: 10899985
    Abstract: Amine alkenyl substituted succinimide reaction product compositions including the reaction products of (1) an amine component including at least one multifunctional amine of structure (1): wherein each R is independently H or CH2CH2CH2NH2; R1 is H, CH2CH2CH2NH2, C1-C21 alkyl, or C2-C21 alkenyl; n is 2; and m is 1 or 2 and (2) an alkenyl substituted anhydride. Additive compositions, fuel additives, fuel compositions and methods for reducing deposit formations in a fuel system are also disclosed.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: January 26, 2021
    Assignee: Evonik Operations GmbH
    Inventors: Buford Brian Smith, Gamini Ananda Vedage
  • Publication number: 20200223978
    Abstract: The present invention relates to an epoxy resin system containing an epoxy resin and a mono-alkylated diamine. The epoxy resin system can further contain a second amine. The present invention also relates to a method for producing an epoxy resin system comprising combining an epoxy resin with a mono-alkylated diamine. The mono-alkylated diamines of this invention enhance desirable processing and cured properties of epoxy resin compositions without the negative impact on mechanical properties in the cured product normally seen with cycloaliphatic amine-based curing agents.
    Type: Application
    Filed: January 7, 2020
    Publication date: July 16, 2020
    Inventors: Gamini Ananda Vedage, Pritesh G. Patel, Jamie Schneck, Sebastian de Nardo, Steffen Kanzler
  • Patent number: 10676564
    Abstract: A composition including an amidoamine curing agent composition or a polyamide curing agent composition are disclosed. The composition includes the reaction products of (1) an amine component including at least one multifunctional amine of structure (I): wherein each R is independently H or CH2CH2CH2NH2; R1 is H, CH3CH2CH2N—, C1-C21 alkyl, or C1-C21 alkenyl; n is 2; and m is 1 or 2, with (2) a fatty acid or ester component selected from the group consisting of a dimer fatty acid or ester component, a monofunctional fatty acid or ester component, and combinations thereof. The amidoamine curing agent composition remains as liquid at ambient temperature.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: June 9, 2020
    Assignee: Evonik Operations GmbH
    Inventors: Gamini Ananda Vedage, Shiying Zheng, Kathryn Sue Hayes
  • Patent number: 10669370
    Abstract: Compositions and curing agents comprising a benzylated Mannich base composition. The benzylated Mannich base composition includes a reaction product of (a) a substituted phenolic compound having at least one substituent of formula (I): wherein R1 is each independently a linear or branched alkyl group having 1 to 4 carbon atoms, and R2 is hydrogen, methyl, ethyl or phenyl, with (b) a benzylated polyalkylene polyamine (II): wherein RA is substituted or unsubstituted benzyl; RB is each independently RA, or a hydrogen atom, or a group selected from C1-C16 linear, cyclic, and branched alkyl, alkenyl, and alkaryl groups; X, Y, and Z are independently selected from C2-C10 alkylene, and cycloalkylene groups; y is an integer from 0 to 7, and z is an integer from 0 to 4; and, optionally, (c) a multifunctional amine. Amine-epoxy compositions and articles produced from these compositions are also disclosed.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: June 2, 2020
    Assignee: Evonik Operations GmbH
    Inventors: Shiying Zheng, Gamini Ananda Vedage, Marcelo Rufo, Daniel Iliev Totev, Michael Cook
  • Publication number: 20190169515
    Abstract: Mannich base compositions include the reaction products of (1) an amine component including at least one multifunctional amine of structure (1): wherein each R is independently H or CH2CH2CH2NH2; R1 is H, CH2CH2CH2NH2, C1-C21 alkyl, or C2-C21 alkenyl; n is 2; and m is 1 or 2, with (2) an alkyl substituted hydroxyaromatic compound, and (3) and aldehyde. The Mannich base compositions are useful for fuel additives and other articles. Additive compositions, fuel additives, fuel compositions and methods for reducing deposit formations in a fuel system are also disclosed.
    Type: Application
    Filed: August 25, 2017
    Publication date: June 6, 2019
    Inventors: Buford Brian Smith, Gamini Ananda Vedage
  • Publication number: 20190169514
    Abstract: Amine alkenyl substituted succinimide reaction product compositions including the reaction products of (1) an amine component including at least one multifunctional amine of structure (1): wherein each R is independently H or CH2CH2CH2NH2; R1 is H, CH2CH2CH2NH2, C1-C21 alkyl, or C2-C21 alkenyl; n is 2; and m is 1 or 2 and (2) an alkenyl substituted anhydride. Additive compositions, fuel additives, fuel compositions and methods for reducing deposit formations in a fuel system are also disclosed.
    Type: Application
    Filed: August 25, 2017
    Publication date: June 6, 2019
    Inventors: Buford Brian Smith, Gamini Ananda Vedage
  • Patent number: 10017603
    Abstract: Liquid epoxy curing agents that have improved latency over conventional liquid curing agents while retaining the physical properties of the cured material are disclosed. These liquid curing agents can be used for curing epoxy resins, or in combination with dicyandiamide (DICY) based curing agents in order to accelerate DICY curing.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: July 10, 2018
    Assignee: Evonik Degussa GmbH
    Inventors: Gauri Sankar Lal, Gamini Ananda Vedage, Stephen Michael Boyce, Dilipkumar Nandlal Shah, Atteye Houssein Abdourazak
  • Patent number: 9944836
    Abstract: The present invention provides novel polymeric amine compositions employing amine compounds having multiple tertiary amine groups. Methods of making these new compositions are also disclosed. Amine compositions and amine-epoxy compositions employing the polymeric amine compositions of the present invention are also provided.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: April 17, 2018
    Assignee: Evonik Degussa GmbH
    Inventors: Gamini Ananda Vedage, Juan Jesus Burdeniuc, Eugene George Lutz
  • Patent number: 9878318
    Abstract: The present invention provides trimerization catalyst compositions and methods to produce a polyisocyanurate/polyurethane foam using such trimerization catalyst compositions. The catalyst composition is the contact product of at least one ?,?-unsaturated carboxylate salt and at least one second carboxylate salt.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: January 30, 2018
    Assignee: Evonik Degussa GmbH
    Inventors: Juan Jesus Burdeniuc, Torsten Panitzsch, John Elton Dewhurst, Gamini Ananda Vedage
  • Patent number: 9862798
    Abstract: The present disclosure provides a liquid curing agent composition comprising at least 50% by weight of a polyamine and 0.2% to 10% by weight of dicyandiamide, the amine/epoxy composition and the product from the cured amine/epoxy composition.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: January 9, 2018
    Assignee: Evonik Degussa GmbH
    Inventors: Shiying Zheng, Pritesh G. Patel, Gamini Ananda Vedage, Edze Jan Tijsma, Gauri Sankar Lal
  • Publication number: 20170342197
    Abstract: Liquid epoxy curing agents that have improved latency over conventional liquid curing agents while retaining the physical properties of the cured material are disclosed. These liquid curing agents can be used for curing epoxy resins, or in combination with dicyandiamide (DICY) based curing agents in order to accelerate DICY curing.
    Type: Application
    Filed: August 21, 2017
    Publication date: November 30, 2017
    Inventors: Gauri Sankar Lal, Gamini Ananda Vedage, Stephen Michael Boyce, Dilipkumar Nandlal Shah, Atteye Houssein Abdourazak