Patents Examined by Hampton-Hightower, P.
  • Production of polysuccinimide by thermal polymerization of maleamic acid
    Patent number: 5393868
    Abstract: A method for producing polysuccinimide is provided. Thermal polymerization of maleamic acid at a temperature of from about 160.degree. C. to about 330.degree. C. produces polysuccinimide. The reaction is optionally conducted in the presence of one or more processing aids, solvents or diluents. The polysuccinimide is particularly useful as a detergent additive.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: February 28, 1995
    Assignee: Rohm and Haas Company
    Inventors: Michael B. Freeman, Yi H. Paik, Ethan S. Simon, Graham Swift