Amino acid salts of anionic dyestuffs which have high solubility in organic solvents

Abstract

This invention concerns a range of amino-acid salts of anionic dyestuffs which have a high solubility in organic solvents, particularly oxygenated, halogenated and amido organic solvents. The amino-acid dyestuff salts have the general formula: [Am.sup.+ ].sub.n-g A.sup.n- [Cat.sup.+ ].sub.q (1) wherein Am.sup.+ is an amino-acid portion of the formula: ##STR1## in which L.sup.2 is a radical of the formula: --(CR.sup.4 R.sup.5).sub.x -- where R.sup.4 and R.sup.5 are each, independently of one another, selected from the group consisting of hydrogen, linear and branched lower alkyl, unsubstituted and substituted aryl and unsubstituted and substituted amino, and x is an integer, R.sup.1, R.sup.2 and R.sup.3 are each, independently of one another, selected from the group consisting of hydrogen, alkyl, aryl, alkaryl, aralkyl and the radical of the formula: --L.sup.1 --COOH where L.sup.2 is any of the radicals of L.sup.1, and which alkyl radicals and moities of R.sup.1, R.sup.2 and R.sup.3 are selected from the group consisting of unsubstituted and substituted alkyl radicals and moieties and uninterrupted alkyl radicals and moieties and alkyl radicals and moieties interrupted by at least one hetero atom selected from the group consisting of oxygen and nitrogen, provided that each of R.sup.1, R.sup.2 and R.sup.3 are not the group of the formula: --L.sup.2 --COOH at one and the same time, A.sup.n- is an anionic dyestuff portion having an n-fold negative charge, Cat.sup.+ is a cationic radical, n is an integer, q is any of 0 and an integer, and when q is greater than 1 then each of the cations may be the same or different.

Dependencies are inferred from the claim text.