From Carboxylic Acid Having Three Or More Carboxylic Acid Groups Or Derivatives Thereof, And An Organic Amine, Or From An Organic Amine Salt Of A Tri-or Higher Carboxylic Acid Patents (Class 528/350)
  • Patent number: 4107174
    Abstract: The imidyl compounds, according to the invention, of the formula I are suitable for the manufacture of polymers which can be crosslinked by light, which polymers can be, for example, polyesters, polyamides, polyamide-imides, polyimides, polyester-polyamides, polyester-amide-imides, polyethers, polyamines, polysaccharides and polysiloxanes. Polymers of this type are suitable for carrying out photochemical processes. Compared with known polymers, the polymers based on the imidyl compounds according to the invention have the advantage that they are photochemically substantially more sensitive. In addition, this sensitivity can also be further increased effectively by a combination with sensitizers.
    Type: Grant
    Filed: June 15, 1976
    Date of Patent: August 15, 1978
    Assignee: Ciba-Geigy Corporation
    Inventors: Marcus Baumann, Vratislav Kvita, Martin Roth, John Sidney Waterhouse
  • Patent number: 4098775
    Abstract: Polyamideimides are described which are derived by conventional procedures from particular 1,1-cycloaliphatic bis(phenylamine) compounds (or the corresponding diisocyanates) and trimellitic acid (preferably through the anhydride acid chloride). The polyamideimides are engineering thermoplastics characterized by the combined properties of solubility, melt processability, and resistance to thermal oxidation.
    Type: Grant
    Filed: November 15, 1976
    Date of Patent: July 4, 1978
    Assignee: The Upjohn Company
    Inventor: Kemal B. Onder