Patents by Inventor Hans-Joachim Zech

Hans-Joachim Zech 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).

  • Use of unsaturated polyesters as additive binders improving adhesion in coating agents for coating of metals
    Patent number: 4478994
    Abstract: Unsaturated polyesters based on isophthalic acid are used as additive binders in coating agents. With the use of these polyesters, the resultant coatings have an adhesiveness to metallic substrates to be protected which is improved in relation to the comparable state of the art coatings. Furthermore, coatings are obtained by which the conditions for the protection of metals from corrosion (good adhesion of the coatings on metallic, in particular, critical metallic substrates, and good resistance of the coatings to environmental influences, in particular, good resistance to hydrolysis) are improved. Hence, improved protection from corrosion is achieved.
    Type: Grant
    Filed: December 28, 1983
    Date of Patent: October 23, 1984
    Assignee: Chemische Werke Huels
    Inventors: Joerg Doerffel, Hans-Joachim Zech