Triazinylaminostilbene disulphonic acid mixtures

A compound of the formula

• in which
• R1and R2 are different and are not derived from the same amino acid or amino acid amide residue
• R1 is —NH2, —NHC1-C4alkyl, —N(C1-C4alkyl)2, —NHC C2-C4 hydroxyalkyl, —N(C2-C4hydroxyalkyl)2, —N(C1-C4alkyl)(C2-C4 hydroxyalkyl), a morpholino residue or an amino acid or an amino acid amide residue from which a hydrogen atom has been removed from the amino group,
• R2 is an amino acid or an amino acid amide residue from which a hydrogen atom has been removed from the amino group,
• each of the rings designated as A represent a 5- or 6-membered saturated heterocycle, which may contain one further heteroatom and M reeresents hydrogen, an alkali metal atom, ammenium or a cation formed from an amine.

A method for whitening synthetic or natural organic material by treating the synthetic or natural material with a composition, which contains water, a fluorescent whitening agent, which comprises a mixture of the compounds (1a), (1b) and (1c), a compound of formula (1b) or a compound of formula (1c)

• in which
• R1 and R2 are different and are not derived from the same amino acid or amino acid amide residue
• R1 is —NH2, —NHC1-C4alkyl, —N(C1-C4alkyl)2, —NHC2-C4 hydroxyalkyl, —N(C2-C4hydroxyalkyl)2, —N(C1-C4alkyl)(C2-C4 hydroxyalkyl), a morpholino residue or an amino acid or an amino acid amide residue from which a hydrogen atom has been removed from the amino group,
• R2 is an amino acid or amino acid derivative from which a hydrogen atom has been removed from the amino group, whereby the residue is derived from alanine, sarcosine, serine, cysteine, phenylalanine, tyrosine (4-hydroxyphenylalanine), diiodotyrosine, tryptophan (β-indolylalanine), histidine (β-imidazolylalanine), α-aminobutyric acid, methionine, valine (α-aminoisovaleric acid), norvaline, leucine (α-aminoisocaproic acid), isoleucine α-amino-β-methylvaleric acid), norleucine (α-amino-n-caproic acid), arginine, ornithine (α,δ-diaminovaleric acid), lysine (α,ε-diaminocaproic acid), aspartic acid (aminosuccinic acid), glutamic acid α-aminoglutaric acid), threonine or hydroxyglutamic acid, as well as mixtures and optical isomers thereof, or from iminodiacetic acid or from N-(propionamido)-N-(2-hydroxyethyl)amine or the corresponding propionic acid,
• each of the rings designated as A represent a 5- or 6-membered saturated heterocycle, which may contain one further heteroatom and M represents hydrogen, an alkali metal atom, ammonium or a cation formed from an amine
• and, optionally, auxiliaries.

Paper, which has been optically brightened by the compound mixture of formulae (1a), (1b) and (1c), a compound of formula (1b) or a compound of formula(1c)

• in which
• R1 and R2 are different and are not derived from the same amino acid or amino acid amide residue
• R1 is —NH2, —NHC1-C4alkyl, —N(C1-C4alkyl)2, —NHC2-C4 hydroxyalkyl, —N(C2-C4hydroxyalkyl)2, —N(C1-C4alkyl)(C2-C4 hydroxyalkyl), a morpholino residue or an amino acid or an amino acid amide residue from which a hydrogen atom has been removed from the amino group,
• R2 is an amino acid or amino acid derivative from which a hydrogen atom has been removed from the amino group, whereby the residue is derived from alanine, sarcosine, serine, cysteine, phenylalanine, tyrosine (4-hydroxyphenylalanine), diiodotyrosine, tryptophan (β-indolylalanine), histidine (β-imidazolylalanine), α-aminobutyric acid, methionine, valine (α-aminoisovaleric acid), norvaline, leucine (α-aminoisocaproic acid), isoleucine α-amino-β-methylvaleric acid), norleucine α-amino-n-caproic acid), arginine, ornithine (α,δ-diaminovaleric acid), lysine (α,ε-diaminocaproic acid), aspartic acid (aminosuccinic acid), glutamic acid (α-aminoglutaric acid), threonine or hydroxyglutamic acid, as well as mixtures and optical isomers thereof, or from iminodiacetic acid or from N-(Propionamido)-N-(2-hydroxyethyl)amine or the corresponding propionic acid,
• each of the rings designated as A represent a 5- or 6-membered saturated heterocycle, which may contain one further heteroatom and M represents hydrogen, an alkali metal atom. ammonium or a cation formed from an amine.

A textile fabric produced from a fibre treated with the compound mixture of formulae (1a), (1b) and (1c), a compound of formula (1b) or a compound of formula (1c)

• in which R1 and R2 are different and are not derived from the same amino acid or amino acid amide residue
• R1 is —NH2, —NHC1-C4alkyl, —N(C1-C4alkyl)2, —NHC2-C4 hydroxyalkyl, —N(C2-C4hydroxyalkyl)2, —N(C1-C4alkyl)(C2-C4 hydroxyalkyl), a morpholino residue or an amino acid or an amino acid amide residue from which a hydrogen atom has been removed from the amino group,
• R2 is an amino acid or amino acid derivative from which a hydrogen atom has been removed from the amino group, whereby the residue is derived from alanine, sarcosine, serine, cysteine, phenylalanine, tyrosine (4-hydroxyphenylalanine), diiodotyrosine, tryptophan (β-indolylalanine), histidine (β-imidazolylalanine), α-aminobutyric acid, methionine, valine (α-aminoisovaleric acid), norvaline, leucine α-aminoisocaproic acid), isoleucine α-amino-β-methylvaleric acid), norleucine (α-amino-n-caproic acid), arginine, ornithine (α,δ-diaminovaleric acid), lysine (α,ε-diaminocaproic acid), aspartic acid (aminosuccinic acid), glutamic acid (α-aminoglutaric acid), threonine, iminodiacetic acid, N-(propionamido)-N-(2-hydroxethyl)amine or the corresponding proionic acid hydroxyglutamic acid, and mixtures and optical isomers thereof,
• each of the rings designated as A represent a 5- or 6-membered saturated heterocycle, which may contain one further heteroatom and M represents hydrogen, an alkali metal atom, ammonium or a cation formed from an amine.