From At Least Two Dicarboxylic Acids Or Derivatives Or Mixtures Thereof Patents (Class 528/339)
Polycarboxylic acid reactant which is a dimer or trimer of an ethylenically unsaturated aliphatic monocarboxylic acid having at least ten carbon atoms; or adduct of said unsaturated monocarboxylic acid with an alpha, beta ethylenically unsaturated carboxylic acid or derivative (Class 528/339.3)
Reactant which is a fatty acid glycerol ester, a fatty acid or salt derived from a naturally occurring glyceride, tall oil, or a fatty acid derived from tall oil (Class 528/339.5)
  • Transparent polyamides
    Patent number: 4111921
    Abstract: A polyamide composition, useful in the preparation of transparent sheets, having improved resistivity toward solvents containing moieties of terephthalic acid and 2-methylpentamethylenediamine, said polyamide characterized by a content of moieties of 2-ethyltetramethyldiamine and/or of isophthalic acid in a concentration totalling 15 to 30 mole percent, with respect to the sum of all diamine moieties or all dicarboxylic acid moieties, as the case may be.
    Type: Grant
    Filed: September 21, 1976
    Date of Patent: September 5, 1978
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Gerhard Bier, Franz Blaschke, Helmut AUS DER Funten, Gerhard Schade