PIGMENT COMPOSITIONS

摘要

CIBA-GEIGY AG Case 3-11209/MA 1706+ Basel (Schweiz) Canada PIGMENTS COMPOSITIONS A process for the manufacture of substantially dust free meterable and readily dispersible beads of a pigment composition which comprises contacting with agitation a suspension of a finely divided pigment or pigment composition in a mixture of water and an oxygenated aliphatic hydrocarbon solvent containing from 1 to 5 carbon atoms and having appreciable solubility in water, together with a solution of a carrier which is substantially water insoluble and soluble in the respective solvent at reflux temperature and then distilling off the solvent and recovering the resultant beads by filtration from the aqueous phase.