Dispersing and stabilizing agents for dyestuffs

Abstract

Dispersions of pigments, disperse- or vat-dyestuffs, wherein the dispersing agent is formed either by cocondensation of a phenolic component, formaldehyde and an alkali metal sulfite or of a sulfonated phenolic component and formaldehyde. These dispersions are characterized in that the dispersing agent used shows an improved dispersing effect. Furthermore, they can also be used when being neutralized for the dispersing alkali sensitive dyestuffs and they show no tendency to soil the fabrics so that also clean shades may be dyed.

We claim: 
     
       1. A dyestuff dispersion consisting essentially of: (a) 1 part by weight of a disperse- or vat-dyestuff; and   (b) 0.2 to 3 parts by weight of a dispersing agent formed by co-condensation of 1 mol of a phenolic component, 1.1 to 4 mols of formaldehyde and 0.3 to 1.6 mols of alkali metal sulfite, said phenolic component being .[.selected from the group consisting of.]. .Iadd.of the formula .Iaddend. ##STR1## wherein R is hydrogen, chlorine or lower alkyl, .Iadd.and .Iaddend.R 1  is hydrogen.[.,.]. .Iadd.or .Iaddend.alkyl with one to 12 carbon atoms.[., B is hydrogen or hydroxyl and A is a single bond, sulfonyl or alkylene with one to four carbon atoms.]..   
     
     
       2. A dyestuff dispersion as claimed in claim 1 wherein the dispersing agent is formed by co-condensation of 1 mol of a phenolic component, 1.2 to 3 mols of formaldehyde and 0.3 to 1.6 mols of sodium sulfite.