Dispersion of pigment or dyestuff in organic liquid

Compositions of matter comprising a finely divided dispersion containing between 5 and 70% by weight based on the total weight of the composition of a solid dyestuff or pigment in an inert liquid hydrocarbon or an inert chlorinated hydrocarbon containing dissolved therein between 5% and 100% by weight based on the weight of the pigment or dyestuff of a dispersing agent which is an adduct of one or more compounds from each of the following classes:

• (a) a polyisocyanate selected from the group consisting of 4:4'-diisocyanatodiphenylmethane, 2:4-diisocyanatotoluene, 2:6-diisocyanatotoluene and mixtures of 2:4- and 2:6-diisocyanatotoluene;
• (b) an aliphatic diol containing from 5 to 10 carbon atoms;
• and
• (c) a compound of the formula:
• Z--X--E--(T--D).sub.n-1 --Q
• wherein Z represents --OH or --NHR, wherein R is alkyl or alkenyl containing up to 18 carbon atoms;
• X is divalent aliphatic hydrocarbon, or a chloro substituent thereof, containing up to 17 carbon atoms;
• T is divalent aliphatic hydrocarbon containing up to 17 carbon atoms;
• n is a positive integer from 1 to 8;
• Q is alkyl or alkenyl containing up to 18 carbon atoms or a hydroxy substituent thereof;
• E is ##STR21## wherein R.sup.1 is hydrogen or R;
• and D is ##STR22## provided that only one of E and D is connected to T via the carbon atom of the carbonyl group present in E and D and that at least one of the groups represented by X, T, Q, R & R.sup.1 contains a carbon chain having from 5 to 18 carbon atoms.