Dispersing agent for solids in polar organic liquids

Claim 1

A dispersion of from 10% to 80% by weight, based on the total weight of the dispersion, of a particulate solid selected from organic pigments, organic disperse dyestuffs and carbon black in a polar organic liquid selected from ethers, esters, ketones, glycols, alcohols and amides, said dispersion containing from 2% to 50% by weight, based on the weight of the particulate solid, of a salt of an amine of the formula: ##STR7## wherein each of A, B and D independently represents alkyl, -YH or ##STR8## wherein each X independently represents an oxygen or a nitrogen atom provided that, where X is oxygen, m+n=1 and p=1, and where X is nitrogen, m+n=2 and p is from 1 to 30; each Q independently represents alkyl or --YH; and each Y independently represents a poly(lower alkylene oxy) chain containing from 3 to 50 lower alkylene oxy groups, provided that (i) at least one of A, B and D contains a poly(lower alkylene oxy) chain, (ii) at least 50% of the lower alkylene groups in each poly(lower alkylene oxy) chain are propylene, and (iii) not more than one of the alkylene or alkyl groups contains more than 8 carbon atoms, with an aromatic acid having at least two benzene rings selected from an organic pigment containing one or more acid groups and an organic dyestuff containing one or more acid groups.