Triazinylaminostilbene disulphonic acid mixtures
AssigneeCiba Specialty Chemicals Corporation
InventorsFabienne Cuesta, Georges Metzger, Roland Naef, Peter Rohringer, Rainer Hans Traber
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Abstract
The present invention relates to a fluorescent whitening agent comprising a mixture of two symmetrically and one asymmetrically substituted triazinylaminostilbene disulphonic acids, novel asymmetrically substituted derivatives, a process for their preparations and use of the mixture for whitening synthetic or natural organic materials, especially paper and for the fluorescent whitening and improvement of sun protection factors of textile materials.
Claims18
A fluorescent whitening agent which is a composition comprising a mixture of two symmetrical compounds (1a) and 1(c) and one asymmetrical compound 1(b) of the formulae
- in which R1 and R2 are different and
- R1 represents —NH2, —NHC1-C4alkyl, —N(C1-C4alkyl)2, —NHC2-C4 hydroxyalkyl, —N(C2-C4hydroxyalkyl)2, —N(C1-C4alkyl)(C2-C4hydroxyalkyl), a morpholino, piperidino or pyrrolidino residue,
- R2 represents —NHC2-C4hydroxyalkyl, —N(C2-C4hydroxyalkyl)2, —N(C1-C4alkyl)(C2-C4hydroxyalkyl), or an amino acid or an amino acid amide residue from which a hydrogen has been removed from the amino group,
- each R3, independently, represents hydrogen, C1-C4alkyl or C1-C4alkoxy and
- M represents hydrogen, an alkali metal atom, ammonium or a cation formed from an amine.
A compound of the formula
- in which
- R1 and R2 are different and
- R1 represents —NH2, —NHC1-C4alkyl, —N(C1-C4alkyl)2, —NHC2-C4hydroxyalkyl, —N(C2-C4hydroxyalkyl)2, —N(C1-C4alkyl)(C2-C4hydroxyalkyl), a morpholino, piperidino or pyrrolidino residue,
- R2 represents an amino acid or an amino acid amide residue from which a hydrogen has been removed from the amino group,
- R3 represents hydrogen, C1-C4alkyl or C1-C4alkoxy and M represents hydrogen, an alkali metal atom, ammonium or a cation formed from an amine.
Dependencies are inferred from the claim text.