| abstract |
Perylene-3,4,9,10-tetracarboxylic acid diimides of the formula 1 in which R is a straight-chain or branched alkylene, alkylenecycloalkylene or cycloalkylenealkylene radical having at least 15 carbon atoms which is interrupted by one or two groups -COO-, -OOC-, -CONH- and / or -NHCO-, and Z is hydrogen, Hydroxy or a group -COOH mean.n n n Such perylene diimides are excellent for dyeing polyolefins. They are characterized in particular by their low tendency to bloom. They are also very suitable for coloring engineering materials, in which they produce fluorescent colors with high fluorescence and excellent heat, light and weather resistance. |