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US 5,626,634 AGranted
Aqueous compositions of solvent-soluble dyestuffs
AssigneeSandoz Ltd.
InventorsJ urgen Goldmann, Bansi L. Kaul
Life of this patent
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Abstract
A liquid dyestuff composition comprising a solvent-soluble dyestuff and a water miscible organic solvent, the composition comprising over 25% by weight of dissolved dyestuff.
Claims11
A process for the preparation of a liquid dyestuff composition comprising the steps of:
- mixing an aqueous presscake with a water content of 30-60% by weight of a C.I. Solvent Dye into a water miscible organic solvent;
- and
- subsequently raising the temperature of the mixture to provide a liquid dyestuff composition consisting essentially of per 100 parts by weight:
- in excess of 0 parts and up to 15 parts water,
- at least 25 parts of a C.I. Solvent Dye, and
- a water miscible organic solvent.
3 more elements
A liquid dyestuff composition produced by:
- mixing an aqueous presscake of a C.I. Solvent Dye into a water miscible organic solvent;
- and
- subsequently raising the temperature of the mixture to provide a liquid dyestuff composition consisting essentially of per 100 parts by weight:
- in excess of 0 parts and up to 15 parts water,
- at least 25 parts of a C.I. Solvent Dye, and
- a water miscible organic solvent.
3 more elements
Dependencies are inferred from the claim text.