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US 5,194,088 AGranted
Process for conditioning organic pigments
AssigneeCiba-Geigy Corporation
InventorsFridolin Babler, Edward E. Jaffe
Life of this patent
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Abstract
A process for converting crude pigments into pigmentary form wherein the crude pigment is premilled, then contacted with a polar solvent at temperatures below 50.degree. C., with or without the presence of particle growth inhibitors, and finally isolated.
Claims14
A process for converting a crude organic pigment into pigmentary form consisting essentially of premilling the crude pigment, contacting the premilled pigment with a polar organic solvent at a temperature below about 50.degree. C. for a period of time sufficient to obtain pigmentary particle size and isolating the pigmentary form.
Dependencies are inferred from the claim text.