Dye suspensions
AssigneeAlbright & Wilson Limited
InventorsWilliam P. Haslop, Jill E. Newton, Richard M. Clapperton
Life of this patent
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Abstract
Water insoluble or sparingly soluble dyestuffs such as disperse dyes as concentrates for making up dyebaths or for use as printing pastes, and optical brightening agents for laundry detergents are formulated as stable suspensions in aqueous structured surfactants.
Claims16
A dye composition consisting essentially of an aqueous structured surfactant having suspended therein particles of a sparingly water soluble or substantially water insoluble dye, wherein said dye is present in an amount of at least 6% by weight, based on the total weight of the composition.
A dye composition consisting essentially of:
- (1) an aqueous structured surfactant comprising
- (i) water, and
- (ii) 2 to 65% by weight, based on the total weight of the composition, of surfactant, and
- (iii) 0 to 50% by weight, based on the total weight of the composition, of a dissolved surfactant desolubilizing electrolyte
- and
- (2) from 6 to 50% by weight, based on the total weight of the composition, of solid particles of a substantially water insoluble or sparingly soluble dye.
Dependencies are inferred from the claim text.