Cationic fluorescent whitening agents
AssigneeCiba-Geigy Corporation
InventorHans R. Meyer
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Abstract
Cationic fluorescent whitening agents of the formula ##STR1## wherein B is a fluorescent whitening agent containing basic tertiary amino groups, m is the number of basic amino groups, and each of R.sub.1, R.sub.2 and R.sub.3 is alkyl of 1 to 4 carbon atoms which is unsubstituted or substituted by non-chromophoric groups, or is alkenyl of 2 to 4 carbon atoms which is unsubstituted or substituted by non-chromophoric groups. These compounds have good solubility in water and they make it possible to prepare concentrated solutions and can be used for whitening organic material.
Claims7
A process of whitening organic material, comprising the step of incorporating in said material or applying to said material a cationic fluorescent whitening agent of the formula ##STR70## wherein B is a fluorescent whitening agent selected from the group consisting of 2-furanylbenzimidazoles, 2-azolylbenzimidazoles, 2-stilbenylbenzimidazoles and 2,5-(benzimidazolyl)furanes,
- m is the number of basic amino groups, and each of R.sub.1, R.sub.2 and R.sub.3 is alkyl of 1 to 4 carbon atoms which is unsubstituted or substituted by a non-chromophoric group, or is alkenyl of 2 to 4 carbon atoms which is unsubstituted or substituted by a non-chromophoric group.
Dependencies are inferred from the claim text.