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US 4,624,678 AGranted
Process for the preparation of granular dye formulations
AssigneeCiba-Geigy Corporation
InventorDieter Schneider
Life of this patent
Estimating the term…
Abstract
The invention describes a process for the preparation of granular dye formulations by mixing a (preferably water-soluble) dye, water, and optionally further assistants with a polyethylene glycol that melts in the range from 40.degree. to 150.degree. C., and drying the resultant solution or suspension in a spray drier or fluidized bed drier. The granular formulations so obtained are permanently dust-free, dissolve rapidly in an aqueous dyebath, and do not cause foaming during dyeing.
Claims9
A process for the preparation of a granular dye formulation which comprises:
- a. suspending or dissolving a dye in water,
- b. adding to the product of step (a) a polyethylene glycol that melts in the range of from 40.degree. C. to 150.degree. C., and
- c. forming granules from the product of step (b) by spray or fluidized bed drying.
Dependencies are inferred from the claim text.