Patents by Inventor Wilfried Knott

Wilfried Knott 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: 20200055992
    Abstract: The production of SiOC-bonded, linear polydimethylsiloxane-polyoxyalkylene block copolymers comprising repeating (AB) units by reaction of polyether diols with trifluoromethanesulfonic acid-acidified, equilibrated ?,?-diacetoxypolydimethylsiloxanes is described, wherein the reaction is undertaken by adding a solid, liquid or gaseous base, optionally using inert solvents.
    Type: Application
    Filed: June 28, 2019
    Publication date: February 20, 2020
    Applicant: Evonik Degussa GmbH
    Inventors: Wilfried Knott, Horst Dudzik, Dagmar Windbiel
  • Publication number: 20200055991
    Abstract: Described is a process for producing trifluoromethanesulfonic acid-acidified, end-equilibrated, acetoxy-bearing siloxanes which comprises reacting cyclic siloxanes, in particular comprising D4 and/or D5, and/or cyclic branched siloxanes of the D/T type with acetic anhydride using trifluoromethanesulfonic acid as catalyst and with addition of acetic acid.
    Type: Application
    Filed: July 1, 2019
    Publication date: February 20, 2020
    Applicant: Evonik Degussa GmbH
    Inventors: Wilfried Knott, Horst Dudzik, Frauke Henning, Jan Caßens
  • Patent number: 10544267
    Abstract: The invention relates to a method for producing siloxanes that have glycerin modifications and, at the same time, hydrophobic substituents. The invention further relates to a siloxane that has glycerin modifications and also hydrophobic side chains, wherein at least some of the glycerin modifications bear ketal groups, and to the use of said new siloxanes.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: January 28, 2020
    Assignee: Evonik Degussa GmbH
    Inventors: Wilfried Knott, Horst Dudzik, Klaus-Dieter Klein
  • Patent number: 10526454
    Abstract: A process for preparing SiC-bonded polyethersiloxanes by precious metal-catalysed addition of olefinically unsaturated polyethers onto siloxanes having SiH groups is described, wherein, prior to commencement of reaction, the siloxane having SiH groups is mixed with an olefinically unsaturated polyether and with a polyethersiloxane by stirring, and then contacted with a precious metal catalyst and optionally further additives, and the SiC bond formation reaction is conducted up to an SiH conversion, determined by gas-volumetric means, of at least 97%.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: January 7, 2020
    Assignee: Evonik Degussa GmbH
    Inventors: Wilfried Knott, Dagmar Windbiel
  • Patent number: 10519280
    Abstract: A process for preparing SiC-bonded polyethersiloxanes by precious metal-catalysed addition of olefinically unsaturated polyethers onto siloxanes having SiH groups is described, in which, prior to commencement of reaction, the siloxane having SiH groups is mixed together with a polyethersiloxane, preferably by stirring, and then, in a second step, this preliminary mixture is contacted with an olefinically unsaturated polyether and with a precious metal catalyst and optionally further additives, preferably with further stirring, and the SiC bond formation reaction is conducted up to an SiH conversion, determined by gas-volumetric means, of at least 97%.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: December 31, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Wilfried Knott, Dagmar Windbiel
  • Patent number: 10414872
    Abstract: A process for producing SiOC-bonded polyether siloxanes by transesterification of alkoxysiloxanes with polyetherols in the presence of zinc acetylacetonate as catalyst is described.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: September 17, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Wilfried Knott, Horst Dudzik, Olga Fiedel, Philippe Favresse, Ute Hesse
  • Patent number: 10414871
    Abstract: Mixtures of cyclic branched siloxanes having exclusively D and T units and having no functional groups, with the proviso that the cumulative proportion of the D and T units having Si-alkoxy and/or SiOH groups that are present in the siloxane matrix, determinable by 29Si NMR spectroscopy, is ?2 mole percent, are described, as are branched organomodified siloxanes obtainable therefrom.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: September 17, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Wilfried Knott, Horst Dudzik
  • Patent number: 10407592
    Abstract: Described is a method for synthesizing polymer compounds (P), preferably polysiloxanes, comprising at least one carboxylic ester group, in particular (meth)acrylate-containing polysiloxanes, said method being carried out in the presence of conversion products (U) of metal salts, in particular chromium(III) salts, and conversion products of aldehydes and primary amines.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: September 10, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Sadik Amajjahe, Frauke Henning, Wilfried Knott, Horst Dudzik, Gabriele Platte, Florian Gaber, Hardi Döhler
  • Patent number: 10399998
    Abstract: Mixtures of cyclic branched siloxanes having exclusively D and T units, with the proviso that the cumulative proportion of the D and T units having Si-alkoxy and/or SiOH groups that are present in the siloxane matrix, determinable by 29Si NMR spectroscopy, is greater than 2 and less than 10 mole percent, are described, as are branched organomodified siloxanes obtainable therefrom.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: September 3, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Wilfried Knott, Horst Dudzik
  • Publication number: 20190248959
    Abstract: The invention relates to a method for producing siloxanes that have glycerin modifications and, at the same time, hydrophobic substituents. The invention further relates to a siloxane that has glycerin modifications and also hydrophobic side chains, wherein at least some of the glycerin modifications bear ketal groups, and to the use of said new siloxanes.
    Type: Application
    Filed: July 5, 2017
    Publication date: August 15, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Wilfried Knott, Horst Dudzik, Klaus-Dieter Klein
  • Publication number: 20190106369
    Abstract: A method of processing of base-catalysed alkoxylation products using sulphonic acid-containing ion exchangers is described, comprising providing a mixture comprising the alkali-catalysed alkoxylation product to be processed, alcohol having 1 to 4 carbon atoms and water, treating this mixture with a sulphonic acid-containing cation exchanger at >40° C. and removal of the alkoxylation product from the mixture thus treated.
    Type: Application
    Filed: March 6, 2017
    Publication date: April 11, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Frank Schubert, Wilfried Knott, Andrea Villa, Volker Zellmer, Gerrit Wienhoefer
  • Publication number: 20190106441
    Abstract: Mixtures of cyclic branched siloxanes having exclusively D and T units, with the proviso that the cumulative proportion of the D and T units having Si-alkoxy and/or SiOH groups that are present in the siloxane matrix, determinable by 29Si NMR spectroscopy, is less than 2.0 and preferably less than 1.0 mole per cent, are described, as are branched organomodified siloxanes obtainable therefrom.
    Type: Application
    Filed: September 25, 2018
    Publication date: April 11, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Wilfried Knott, Horst Dudzik
  • Publication number: 20190100625
    Abstract: Mixtures of cyclic branched siloxanes having exclusively D and T units and having no functional groups, with the proviso that the cumulative proportion of the D and T units having Si-alkoxy and/or SiOH groups that are present in the siloxane matrix, determinable by 29Si NMR spectroscopy, is ?2 mole per cent, are described, as are branched organo-modified siloxanes obtainable therefrom.
    Type: Application
    Filed: November 14, 2018
    Publication date: April 4, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Wilfried Knott, Horst Dudzik
  • Publication number: 20190048228
    Abstract: Described is a method for synthesizing polymer compounds (P), preferably polysiloxanes, comprising at least one carboxylic ester group, in particular (meth)acrylate-containing polysiloxanes, said method being carried out in the presence of conversion products (U) of metal salts, in particular chromium(III) salts, and conversion products of aldehydes and primary amines.
    Type: Application
    Filed: October 13, 2016
    Publication date: February 14, 2019
    Inventors: Sadik Amajjahe, Frauke Henning, Wilfried Knott, Horst Dudzik, Gabriele Platte, Florian Gaber, Hardi Döhler
  • Publication number: 20190040205
    Abstract: A process for producing SiOC-bonded polyether siloxanes by transesterification of alkoxysiloxanes with polyetherols in the presence of zinc acetylacetonate as catalyst is described.
    Type: Application
    Filed: July 9, 2018
    Publication date: February 7, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Wilfried Knott, Horst Dudzik, Olga Fiedel, Philippe Favresse, Ute Hesse
  • Publication number: 20180355114
    Abstract: A process for preparing SiC-bonded polyethersiloxanes by precious metal-catalysed addition of olefinically unsaturated polyethers onto siloxanes having SiH groups is described, in which, prior to commencement of reaction, the siloxane having SiH groups is mixed together with a polyethersiloxane, preferably by stirring, and then, in a second step, this preliminary mixture is contacted with an olefinically unsaturated polyether and with a precious metal catalyst and optionally further additives, preferably with further stirring, and the SiC bond formation reaction is conducted up to an SiH conversion, determined by gas-volumetric means, of at least 97%.
    Type: Application
    Filed: May 14, 2018
    Publication date: December 13, 2018
    Inventors: Wilfried Knott, Dagmar Windbiel
  • Publication number: 20180355115
    Abstract: A process for preparing SiC-bonded polyethersiloxanes by precious metal-catalysed addition of olefinically unsaturated polyethers onto siloxanes having SiH groups is described, wherein, prior to commencement of reaction, the siloxane having SiH groups is mixed with an olefinically unsaturated polyether and with a polyethersiloxane by stirring, and then contacted with a precious metal catalyst and optionally further additives, and the SiC bond formation reaction is conducted up to an SiH conversion, determined by gas-volumetric means, of at least 97%.
    Type: Application
    Filed: May 14, 2018
    Publication date: December 13, 2018
    Inventors: Wilfried Knott, Dagmar Windbiel
  • Publication number: 20180319823
    Abstract: Mixtures of cyclic branched siloxanes having exclusively D and T units, with the proviso that the cumulative proportion of the D and T units having Si-alkoxy and/or SiOH groups that are present in the siloxane matrix, determinable by 29Si NMR spectroscopy, is greater than 2 and less than 10 mole per cent, are described, as are branched organomodified siloxanes obtainable therefrom.
    Type: Application
    Filed: March 16, 2018
    Publication date: November 8, 2018
    Inventors: Wilfried Knott, Horst Dudzik
  • Publication number: 20180305596
    Abstract: The invention relates to curable mixtures comprising at least one binder composition and also at least one curing agent mixture and optionally one or more alkoxysilane compounds, and also to their use.
    Type: Application
    Filed: October 28, 2016
    Publication date: October 25, 2018
    Applicant: Evonik Degussa GmbH
    Inventors: Frank SCHUBERT, Wilfried KNOTT, Frank GRIMMELT, Anke LEWIN
  • Patent number: 10106649
    Abstract: The invention relates to polyethers preparable in the presence of a DMC catalyst comprising polyether siloxanes, to processes for preparing the polyethers and to the use thereof.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: October 23, 2018
    Assignee: Evonik Degussa GmbH
    Inventors: Olga Fiedel, Frank Schubert, Michael Fiedel, Wilfried Knott