| abstract |
Process for the preparation of perylene-3,4,9,10-tetracarboxylic acid N, N'-bis-methylimide in the form of a pigment having a clear and clean yellowish tint Perylene-3,4,9,10-tetracarboxylic acid N, N'-bis-methylimide produced by methylation of perylene and perylene-3,4 produced by condensation of perylenetetracarboxylic acid anhydride with methylamine , 9,10-tetracarboxylic acid N, N′-bis-methylimide in the presence of dimerized rosin. The resulting pigments are notable for their excellent color and rheological properties and are suitable for use in a variety of applications. |