Particulate coloring composition made by prilling
AssigneeHolland Colours Apeldoorn B.V.
InventorsRichard F. T. Bes, Jan D. Knol, Gooitsen Roest
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Abstract
Coloring composition in finely divided form, obtained by mixing a meltable organic carrier with a pigment and finely dividing the composition. The organic carrier consists of a mono or tetra ester of pentaerythritol and stearic acid, stearylamide, ethylene bisstearylamide or hydrogenated castor oil. For adjusting the melting range and the viscosity of the composition, metal soaps, waxes or phthalic acid esters may be added.
Claims13
Coloring compositions for coloring articles, obtained by the process of mixing in the absence of water and organic solvent particles of at least one coloring pigment with a molten carrier solid at ambient temperatures and having a melting point of below 150.degree. C., wherein the carrier consists essentially of hydrogenated castor oil or an organic compound of the general formula ##STR2## in which (a) if X is a free or esterified hydroxyl group, R.sub.1, R.sub.2 are hydrogen and R.sub.3, R.sub.4 and R.sub.5 represent a free or esterified hydroxymethyl group;
- (b) if X is a NH.sub.2 group, R.sub.1 and R.sub.2 represent a.dbd.O group, R.sub.3 and R.sub.4 hydrogen and R.sub.5 is a saturated alkyl group;
- wherein the pigmentation ratio of the coloring composition is between 15 and 95%, and wherein said mixture is thereafter prilled.
Dependencies are inferred from the claim text.