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US 4,066,595 AGranted
Water-soluble dye composition
AssigneeCiba-Geigy Corporation
InventorHans-Henning Bunge
Life of this patent
Estimating the term…
Abstract
A water-soluble dye containing composition which comprises of a dye which is soluble in a water-miscible solvent and is insoluble in water alone, a water-miscible solvent and a water-soluble resin. These compositions may be prepared by first dissolving a dye in a water-miscible solvent and thereafter adding the dye solution to an aqueous solution of a resin. The resulting compositions are useful to color aqueous resin emulsions.
Claims14
A water-soluble composition comprising
- a. 0.01% to 40% of a dye which is soluble in water-miscible solvents and insoluble solely in water;
- b. 1.0% to 88% of a water-miscible solvent or mixture of solvents which is inert to said dye;
- c. 0.1% to 89% of a water-soluble resin;
- d. 10% to 98% water;
- and optionally, a basic compound to raise the pH of the solution to about 10.
2 more elements
A method of preparing a water-soluble dye composition which comprises
- 1. dissolving a dye in a water-miscible solvent, said dye being characterised in the Colour Index as a solvent soluble dye and one which is insoluble solely in water, and
- 2. adding said dye solution to a solution containing a water-soluble resin dissolved in water;
- and optionally adding a basic compound to raise the pH of the solution to about 10;
- or
- 1. dissolving a dye and water-soluble resin in a water-miscible solvent, said dye being characterised in the Colour Index as a solvent soluble dye and one which is insoluble solely in water;
- and
- 2. adding water to the dye solution;
- and optionally adding a basic compound to raise the pH of the solution to about 10.
5 more elements
Dependencies are inferred from the claim text.