Patents by Inventor Dieter Sonderhof

Dieter Sonderhof 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).

  • Metal carboxylate derivatives for use in synthetic materials, emulsions and suspensions
    Patent number: 4999400
    Abstract: The invention relates to metal carboxylate derivatives of partially esterified .alpha.-olefin unsaturated polycarboxylic acid copolymers, the .alpha.-olefin containing 6 to 40 carbon atoms and the copolymer being esterified with an alcohol. At least 80 percent by weight of the unesterified copolymer has a molecular weight in the range from 1000 to 100,000. Preferably, the .alpha.-olefin is maleic anhydride and the alcohol contains 4 to 18 carbon atoms. The present compounds are surprisingly satisfactory internal and external lubricants for synthetic resin such as PVC. Furthermore, the present compounds can be used as emulsifying and/or suspending agents, in particular when the alcohol is a polyethylene oxide glycol ether with 1 to 50 ethylene oxide units.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: March 12, 1991
    Assignee: Akzo N.V.
    Inventors: Helmut Kuhne, Karl-Heinz Frassek, Dieter Sonderhof, Gunther Lanzrath, Fritz Steinseifer, Heinz Beck
  • Metal carboxylate derivatives for use in synthetic materials, emulsions and suspensions
    Patent number: 4775723
    Abstract: The invention relates to metal carboxylate derivatives of partially esterified .alpha.-olefin unsaturated polycarboxylic acid copolymers, the .alpha.-olefin containing 6 to 40 carbon atoms and the copolymer being esterified with an alcohol. At least 80 percent by weight of the unesterified copolymer has a molecular weight in the range from 1000 to 100,000. Preferably, the .alpha.-olefin is maleic anhydride and the alcohol contains 4 to 18 carbon atoms. The present compounds are surprisingly satisfactory internal and external lubricants for synthetic resin as PVC. Furthermore, the present compounds can be used as emulsifying and/or suspending agents, in particular when the alcohol is a polyethylene oxide glycol ether with 1 to 50 ethylene oxide units.
    Type: Grant
    Filed: November 4, 1987
    Date of Patent: October 4, 1988
    Assignee: AKZO N.V.
    Inventors: Helmut Kuhne, Karl-Heinz Frassek, Dieter Sonderhof, Gunther Lanzrath, Fritz Steinseifer, Heinz Beck