Patents by Inventor Theodorus J. Bouwmans

Theodorus J. Bouwmans 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).

  • Polyamide from aromatic amide groups-containing diamine
    Patent number: 5162489
    Abstract: Diamines having a 1,1,3-trimethylphenylindane dicarboxylic moiety linked on both sides to phenylene diamine by an amide bond (PIDA diamines) are disclosed. By reacting these diamines with aromatic difunctional acid derivatives, amorphous polymers having high glass transition temperatures (Tg) can be prepared. If aliphatic diacid derivatives are used the resulting polymers have a lower Tg, but have the advantage of melt-processability. The PIDA-diamines can also be used in the preparation of polyimides, being reacted either with tri-or tetracarboxylic anhydrides or with imide group-containing acid derivatives.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: November 10, 1992
    Assignee: Akzo N.V.
    Inventors: Cornelis R. H. I. De Jonge, Gerrit Hoentjen, Theodorus J. Bouwmans
  • Aromatic amide groups-containing diamines and polymers prepared therefrom
    Patent number: 4980504
    Abstract: Diamines having a 1,1,3-trimethylphenylindane dicarboxylic moiety linked on both sides to phenylene diamine by an amide bond (PIDA diamines) are disclosed. By reacting these diamines with aromatic difunctional acid derivatives, amorphous polymers having high glass transition temperatures (Tg) can be prepared. If aliphatic diacid derivatives are used the resulting polymers have a lower Tg, but have the advantage of melt-processability. The PIDA-diamines can also be used in the preparation of polyimides, being reacted either with tri- or tetracarboxylic anhydrides or with imide group-containing acid derivatives.
    Type: Grant
    Filed: July 28, 1989
    Date of Patent: December 25, 1990
    Assignee: Akzo N.V.
    Inventors: Cornelis R. H. I. De Jonge, Gerrit Hoentjen, Theodorus J. Bouwmans