| abstract |
The amphoteric styrene derivatives correspond to the formula <IMAGE> (1) in which X is oxygen, sulfur, a direct bond, -SO2N(R5-, -CON(R5- or -COO-, Y1 and Y2 independently of one another are C1-C4-alkylene or hydroxypropylene, R1 and R2 independently of one another are C1-C4-alkyl or, together with the N atom, are a pyrrolidine, piperidine, hexamethyleneimine or morpholine ring, and R1, together with R5, is also a piperazine ring, R3 and R4 are hydrogen, C1-4-alkyl, chlorine, C1-4-alkoxy or C3-4-alkenyl or together, in the o-position relative to one another, are a trimethylene or tetramethylene group, R5 is hydrogen, C1-4-alkyl or cyanoethyl or, together with R1, is a piperazine ring, Q is -COO or -SO3 and n is the number 1 or 2, and can be prepared by reacting the corresponding amine compounds with a halide of the formula Hal-Y2-QH and saponifying the quaternary ammonium halides eventually formed. They can be used for the fluorescent brightening of organic materials. |