Patents by Inventor Holger Herbert Dartmann

Holger Herbert Dartmann 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).

  • Process for the preparation of an aqueous coating composition, aqueous coating compositions, and the use thereof for coating packaging containers
    Patent number: 5792804
    Abstract: The present invention relates to a process for the preparation of an aqueous coating composition containing a carboxyl-containing epoxy resin having an acid number in the range from 5 to 200 mg of KOH/g and having an epoxide equivalent weight in the range from 1000 to 40,000, optionally crosslinking agents, organic solvents, optionally conventional assistants and additives, and optionally pigments and fillers. The organic binder solution is neutralized using a tertiary amine in the temperature range from 60.degree. C. to 120.degree. C. This is followed by dispersion in water, with the proviso that at least 95% of the epoxide groups of the epoxy resin have been reacted. The aqueous coating compositions prepared by the process are preferably used for coating cans.
    Type: Grant
    Filed: March 14, 1994
    Date of Patent: August 11, 1998
    Assignee: BASF Lacke + Farben, AG
    Inventors: Klaus Cibura, Hans Jurgen Figge, Regina Willmer, Holger Herbert Dartmann