Patents by Inventor Eva Ruba

Eva Ruba 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: 9039927
    Abstract: Process for the preparation of etherified melamine/formaldehyde condensates, in which first a methylolation of melamine with a formaldehyde component in the molar ratio of from 1:6 to 1:15, preferably at a pH of >7, is carried out. This is followed by an etherification of the resulting hydroxymethylation intermediate in the presence of a C1-C20-alkyl, preferably of a C1-C6-alcohol, particularly preferably of a C1-C4-alcohol, at a pH of <4.5, and subsequently by at least one distillation step in order to remove in particular methanol from the system, the pH of >9.5 being established before, during and/or after the distillation. According to the invention, a plurality of hydroxymethylation, etherification and distillation steps follow in order to achieve an etherified melamine/formaldehyde condensate which is distinguished by a high degree of hydroxymethylation, a high solids content and a low viscosity.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: May 26, 2015
    Assignee: BASF SE
    Inventors: Andreas Eichfelder, Rainer Erhardt, Martin Reif, Eva Ruba, Günter Scherr, Jörg Schneider, Dieter Weilacher
  • Publication number: 20090121181
    Abstract: Process for the preparation of etherified melamine/formaldehyde condensates, in which first a methylolation of melamine with a formaldehyde component in the molar ratio of from 1:6 to 1:15, preferably at a pH of >7, is carried out. This is followed by an etherification of the resulting hydroxymethylation intermediate in the presence of a C1-C20-alkyl, preferably of a C1-C6-alcohol, particularly preferably of a C1-C4-alcohol, at a pH of <4.5, and subsequently by at least one distillation step in order to remove in particular methanol from the system, the pH of >9.5 being established before, during and/or after the distillation. According to the invention, a plurality of hydroxymethylation, etherification and distillation steps follow in order to achieve an etherified melamine/formaldehyde condensate which is distinguished by a high degree of hydroxymethylation, a high solids content and a low viscosity.
    Type: Application
    Filed: December 7, 2006
    Publication date: May 14, 2009
    Applicant: BASF SE Patents and Trademarks and Licenses
    Inventors: Andreas Eichfelder, Rainer Erhardt, Martin Reif, Eva Ruba, Gunter Scherr, Jorg Schneider, Dieter Weilacher