Patents by Inventor Melanie Sajitz

Melanie Sajitz 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: 20210221971
    Abstract: The present invention relates to a novel method for manufacturing rigid epoxy foams. Furthermore the present invention relates to materials, especially novel two-component epoxy systems that are used to conduct this method. This novel process is characterized in that an epoxy resin is mixed with a blowing agent, especially an encapsulated blowing agent, and afterwards with an ionic liquid. Surprisingly the reaction, including foaming, starts at room temperature after a short time like after only 2 to 3 minutes. In summary, the present invention comprises a two-component foam-in-place structural material and a process for producing a rigid epoxy foam.
    Type: Application
    Filed: August 21, 2018
    Publication date: July 22, 2021
    Applicant: Evonik Operations GmbH
    Inventors: Melanie Sajitz, Liyin Zhou, Michael Vogel
  • Patent number: 10793664
    Abstract: A process for preparing trimers and/or oligomers of diisocyanates is disclosed along with a composition of trimers and/or oligomers formed from diisocyanates and monomeric diisocyanates obtainable by reaction of I. 5-94.999% by weight of A) at least one diisocyanate having a boiling point of less than 250° C. (at standard pressure) and/or B) at least one diisocyanate having a boiling point of 250-350° C. (at standard pressure), in the presence of II. 94.999-5% by weight of C) at least one diisocyanate having a boiling point above 350° C. (at standard pressure), III. in the presence of at least one trimerization catalyst in amounts of 0.001% to 5% by weight, and the amounts of I.-III. add up to 100% by weight.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: October 6, 2020
    Assignee: Evonik Operations GmbH
    Inventors: Rainer Lomölder, Christoph Nacke, Melanie Sajitz, Emmanouil Spyrou, Dirk Hoppe
  • Publication number: 20180327538
    Abstract: A process for preparing trimers and/or oligomers of diisocyanates is disclosed along with a composition of trimers and/or oligomers formed from diisocyanates and monomeric diisocyanates obtainable by reaction of I. 5-94.999% by weight of A) at least one diisocyanate having a boiling point of less than 250° C. (at standard pressure) and/or B) at least one diisocyanate having a boiling point of 250-350° C. (at standard pressure), in the presence of II. 94.999-5% by weight of C) at least one diisocyanate having a boiling point above 350° C. (at standard pressure), III. in the presence of at least one trimerization catalyst in amounts of 0.001% to 5% by weight, and the amounts of add up to 100% by weight.
    Type: Application
    Filed: May 4, 2018
    Publication date: November 15, 2018
    Inventors: Rainer Lomölder, Christoph Nacke, Melanie Sajitz, Emmanouil Spyrou, Dirk Hoppe
  • Patent number: 8907118
    Abstract: The invention relates to a method for producing acyloxy benzoic acids of the formula (I), in which R1 is a linear or branched saturated alkyl group with 6 to 30 carbon atoms, a linear or branched mono- or polyunsaturated alkenyl group with 6 to 30 carbon atoms, or an aryl group with 6 to 30 carbon atoms. The acyloxy benzoic acids of the formula (I) are produced from para-hydroxy benzoic acid and a corresponding carboxylic acid halide in the presence of an alkali hydroxide.
    Type: Grant
    Filed: August 6, 2011
    Date of Patent: December 9, 2014
    Assignee: Clariant International Ltd.
    Inventors: Melanie Sajitz, Gerd Reinhardt, Isabel Scheffer, Werner Janitschek, Ina Herrgen
  • Patent number: 8901342
    Abstract: The invention relates to a method for producing acyloxy benzoic acids of the formula (I), in which R1 is a linear or branched saturated alkyl group with 6 to 30 carbon atoms, a linear or branched mono- or polyunsaturated alkenyl group with 6 to 30 carbon atoms, or an aryl group with 6 to 30 carbon atoms. The acyloxy benzoic acids of the formula (I) are produced from para-hydroxy benzoic acid and a corresponding carboxylic acid halogenide in the presence of a base and are advantageously suitable for use as activators for hydrogen peroxide.
    Type: Grant
    Filed: August 6, 2011
    Date of Patent: December 2, 2014
    Assignee: Clariant International Ltd
    Inventors: Melanie Sajitz, Isabel Scheffer, Werner Janitschek
  • Patent number: 8536334
    Abstract: The invention relates to a method for producing 3,7-diaza-bicyclo[3.3.1]nonane metal complexes, wherein the ligand, a 3,7-diaza-bicyclo[3.3.1]nonane compound, is reacted with an aqueous metal(II)salt solution in one step. According to the invention, the reaction stage is carried out with water as solvent.
    Type: Grant
    Filed: December 12, 2009
    Date of Patent: September 17, 2013
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Melanie Sajitz, Barbara Duecker, Michael Wessling
  • Publication number: 20130217911
    Abstract: The invention relates to a method for producing acyloxy benzoic acids of the formula (I), in which R1 is a linear or branched saturated alkyl group with 6 to 30 carbon atoms, a linear or branched mono- or polyunsaturated alkenyl group with 6 to 30 carbon atoms, or an aryl group with 6 to 30 carbon atoms. The acyloxy benzoic acids of the formula (I) are produced from para-hydroxy benzoic acid and a corresponding carboxylic acid halide in the presence of an alkali hydroxide.
    Type: Application
    Filed: August 6, 2011
    Publication date: August 22, 2013
    Applicant: CLARIANT FINANCE (BVI) LIMITED
    Inventors: Melanie Sajitz, Gerd Reinhardt, Isabel Scheffer, Werner Janitschek, Ina Herrgen
  • Publication number: 20130211131
    Abstract: The invention relates to a method for producing acyloxy benzoic acids of the formula (I), in which R1 is a linear or branched saturated alkyl group with 6 to 30 carbon atoms, a linear or branched mono- or polyunsaturated alkenyl group with 6 to 30 carbon atoms, or an aryl group with 6 to 30 carbon atoms. The acyloxy benzoic acids of the formula (I) are produced from para-hydroxy benzoic acid and a corresponding carboxylic acid halogenide in the presence of a base and are advantageously suitable for use as activators for hydrogen peroxide.
    Type: Application
    Filed: August 6, 2011
    Publication date: August 15, 2013
    Applicant: CLARIANT FINANCE (BVI) LIMITED
    Inventors: Melanie Sajitz, Isabel Scheffer, Werner Janitschek
  • Patent number: 8293910
    Abstract: The invention relates to a one-pot reaction for the production of 3,7-diaza-bicyclo[3.3.1]nonane compounds, wherein in a first step a dicarboxylic acid ester is reacted with a pyridine aldehyde and a primary amine. The piperidone created in this manner is reacted with formaldehyde and a further primary amine in a second step. It is essential to the invention that both reaction steps are carried out in a one-pot variation in a C1-C4 alcohol as the solvent, and that the reaction water created is removed by means of distillation.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: October 23, 2012
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Melanie Sajitz, Steve Laborda, Peter Naumann, Michael Wessling
  • Publication number: 20110263857
    Abstract: The invention relates to a method for producing 3,7-diaza-bicyclo[3.3.1]nonane metal complexes, wherein the ligand, a 3,7-diaza-bicyclo[3.3.1] nonane compound, is reacted with an aqueous metal(II)salt solution in one step. According to the invention, the reaction stage is carried out with water as solvent.
    Type: Application
    Filed: December 12, 2009
    Publication date: October 27, 2011
    Applicant: CLARIANT FINANCE (BVI) LIMITED
    Inventors: Melanie Sajitz, Barbara Duecker, Michael Wessling
  • Publication number: 20110152528
    Abstract: The invention relates to a one-pot reaction for the production of 3,7-diaza-bicyclo[3.3.1]nonane compounds, wherein in a first step a dicarboxylic acid ester is reacted with a pyridine aldehyde and a primary amine. The piperidone created in this manner is reacted with formaldehyde and a further primary amine in a second step. It is essential to the invention that both reaction steps are carried out in a one-pot variation in a C1-C4 alcohol as the solvent, and that the reaction water created is removed by means of distillation.
    Type: Application
    Filed: August 17, 2009
    Publication date: June 23, 2011
    Applicant: CLARIANT FINANCE (BVI) LIMITED
    Inventors: Melanie Sajitz, Steve Laborda, Peter Naumann, Michael Wessling