N‐2‐mercaptoethyl amides of fatty acids舒A new class of derivatives

Twelve N-2-mercaptoethyl amides have been prepared by reacting 2-aminoethyl mercaptan with a carboxylic acid in refluxing xylene or toluene. All products were well-defined crystalline compounds except for the dimer acid derivatives. Addition of dithiol amides, prepared from dimer acids and 2-aminoethyl mercaptan, to diolefins gave a new class of potential protective coatings, a polyamide of a dimerized fatty acid with a β-thio linkage. Oxidation of the dithiols gave the corresponding disulfides, another new class of compounds, a polyamide with a β-disulfide structure. Film properties have been obtained with both classes of polymers. Air-dried films were soft and tacky, but baking the films improved hardness. Dry-to-touch times of less than 2 hr at 150C and good alkali resistance were obtained.