Patents by Inventor Eduard Duch

Eduard Duch 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 preparing acrylic acid or methacrylic acid ester polymer having a high isotacticity and a narrow molecular weight distribution
    Patent number: 4124751
    Abstract: Esters of acrylic acid and methacrylic acid may be polymerized with the aid of either free radical forming or ionically effective initiators. The stereospecificy of the polymers may be influenced by the selection of specific initiators; magnesium-organic compounds are suitable for the synthesis of isotactic polymers. Acrylic acid and methacrylic acid esters having a high degree of isotacticity and a narrow molecular weight distribution are obtained with the aid of substituted phenylmagnesium halides. They are suitable as gauge and as test substances.
    Type: Grant
    Filed: September 1, 1977
    Date of Patent: November 7, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Johann P. Fischer, Friedrich Cavagna, Eduard Duch, Karl-Friedrich Muck