Color former composition
AssigneeCiba-Geigy Corporation
InventorsReginald N. Pineger, Malcolm C. Clark
Life of this patent
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Abstract
A solid color former composition is produced in a low-dusting form by admixture with 0.1 to 10% by weight, based on the weight of the color former, of an organic hydrophobic liquid or low melting solid, which does not react with the color former.
Claims5
A solid colour former composition comprising a colour former and from 0.1 to 10% by weight, based on the weight of the colour former, of an organic hydrophobic liquid which does not react with the colour former selected from the group consisting of kerosene, partially hydrogenated terphenyl and mixtures thereof.
A process for the production of a solid non-dusting or only slightly dusting colour former composition which comprises treating the colour former with 0.1 to 10% by weight, based on the weight of the colour former, of a hydrophobic liquid which does not react with the colour former, selected from the group consisting of kerosene, partially hydrogenated terphenyl and mixtures thereof, wherein the organic hydrophobic liquid is added to a mixer which is charged with the colour former, or to a solution or suspension of the colour former which is then spray dried, or to a dryer, containing the colour former, before, during or after drying.
Dependencies are inferred from the claim text.