Aqueous dyestuff preparation: lithium bicarbonate and reactive dye
AssigneeBayer Aktiengesellschaft
InventorsJoachim Grutze, Friedhelm Buse, Johannes Haas, Manfred Hobohm
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Abstract
An improved aqueous dyestuff preparation which is suitable for the dyeing or printing of substrates contains a water-soluble lithium compound and an alkali, in particular sodium hydroxide.
Claims9
Aqueous reactive dyestuff preparation for dyeing and printing comprising
- a) 1 to 100 g of lithium bicarbonate
- b) 0.5 to 150 g of alkali selected from the group consisting of sodium carbonate, water glass, sodium phosphate and sodium hydroxide
- c) 0.1 to 200 g of reactive dyestuff per 1000 g of aqueous preparation and, optionally
- d) dispersants, complexing agents and nucleation inhibitors.
Process for dyeing from a long liquor using a reactive dye stuff, characterised in that lithium bicarbonate is added to the liquor before adding the reactive dyestuff, then a salt is added followed by addition of the reactive dyestuff and alkali selected from the group consisting of sodium carbonate, water glass, sodium phosphate and sodium hydroxide in order to adjust the dyeing pH to 6 to 12.
Dependencies are inferred from the claim text.