Process for the production of negligibly dusty preparation
AssigneeCiba-Geigy Corporation
InventorsKonrad Neumann, Ernst Schenkenberger, Friedrich Resch
Life of this patent
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Abstract
Described is a process for the production of negligibly dusty preparations by spray drying an aqueous suspension containing at least one water-soluble dye or optical brightener and optionally further additives, characterized in that a dust-binding surface active agent is added to the aqueous suspension containing at least one adhesive as e.g. sorbitol and/or to the spray-dried product.
Claims14
A process for the production of negligibly dusty preparations by spray drying an aqueous suspension consisting essentially of water, at least one water-soluble dye or optical brightner, at least one water-soluble adhesive containing at least five hydroxyl groups per molecule wherein said adhesive softens or melts in the temperature range of 30.degree.-150.degree. C., and in the presence or absence of diluting agents, dispersing agents, stabilisers against oxidative or reductive effects, pH-adjusting acids, bases or buffering agents;
- and wherein a dust-binding water-soluble surface-active agent is added to said aqueous suspension, or said dust-binding water-soluble surface-active agent is added to the spray-dried product, or partially to said aqueous suspension and partially to the spray-dried product.
Dependencies are inferred from the claim text.