DISTYRYLEBENZENES,PROCESS FOR THEIR PREPARATION AND THEIR USE FOR THE OPTICAL BRIGHTENING OF ORGANIC MATERIALS,AS WELL AS DETERGENT COMPOSITIONS, TEXTILE TREATING COMPOSITIONS AND PRODUCTS FOR THE AFTER-TREATMENT OF LAUNDRY CONTAINING SUCH DISTYRYLBENZENES

摘要

The distyrylbenzenes of the formula (1) in which X and X' independently of one another are -COO- or -CON(R4)- in the o-position, a direct bond, oxygen, sulfur, -O-C1-3-alkylene-CON(R4)-, -SO2N(R4)-, -O-C1-3-alkylene-COO- or -OCO-, Y and Y' independently of one another are C1-20-alkylene, R1 and R1' independently of one another are unsubstituted or substituted C1-8-alkyl or C3-4-alkenyl, or R1 together with R2, or R1' together with R2', is a heterocyclic ring, R2 and R2' independently of one another are unsubstituted or substituted C1-8-alkyl or C3-4-alkenyl, or R2 together with R1, or R2' together with R1', is a heterocyclic ring, or R1 and R2, or R1' and R2', together with R3 are a pyridine or picoline ring, R3 is hydrogen, unsubstituted or substituted C1-4-alkyl or C3-4-alkenyl, or together with R1 and R2 or with R1' and R2 ' is a pyridine or picoline ring, R4 is hydrogen or unsubstituted or substituted C1-16-alkyl, A(-) is a colorless anion and n and n' independently of one another are the number 0 or 1, and the benzene nuclei B and C can also be substituted by non-chromophoric substituents, can be prepared by reacting a correspondingly substituted benzaldehyde with a p-xylylenephosphonate and then alkylating or protonising the distyrylbenzenediamine formed. The distyrylbenzenes are fluorescent brightening agents for organic materials. They are particularly suitable for use as additives to textile and laundry after-treatment agents which contain cationic textile softeners.