Distyrylbiphenyl compounds
AssigneeCiba-Geigy Corporation
InventorsKurt Weber, Claude Eckhardt
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Abstract
Distyrylbiphenyl compounds of formula ##STR1## wherein R.sub.1, R.sub.3, R.sub.6 and R.sub.7 are halogen, hydrogen, C.sub.1 -C.sub.4 alkyl or cyano, and M.sup..sym. is a salt-forming cation, are used as fluorescent whitening agents in solid and, preferably, liquid, detergent compositions. They are distinguished by good white effects and insignificant spotting behavior.
Claims8
A distyrylbiphenyl compound of formula ##STR24## wherein R.sub.1 and R.sub.3 are each independently of the other hydrogen, C.sub.1 -C.sub.4 -alkyl or cyano,
- R.sub.2 and R.sub.4 are each independently of the other C.sub.1 -C.sub.4 alkyl or cyano, and
- M.sup..sym. is a salt-forming cation.
A distyrylbiphenyl compound of formula ##STR30## wherein R".sub.2 and R".sub.4 are methyl, and M".sup..sym. is sodium or potassium.
Dependencies are inferred from the claim text.