D - Textiles – Paper – 06 – P
Patent
D - Textiles, Paper
06
P
167/302, 8/93.68
D06P 1/00 (2006.01) D06P 3/08 (2006.01)
Patent
CA 1149286
ABSTRACT Aqueous compositions for darkening keratinous material, particularly hair, comprise a mixture of a solution of a salt of thiosulphuric acid, preferably in an amount of 0.2-5.0% by weight as thiosulphate ion, preferably as the sodium thiosulphate or an amine such as triethanolamine thiosulphate; with a solution of a complex of bismuth with an amino-polyacetic acid such as nitrilotriacetic acid or ethylenediamine tetracetic acid, the bismuth preferably being present in an amount (measured as carbonate) of 0.1-5.0% by weight; in the presence of a water-soluble amine, preferably an alkanolamine such as mono-, di- or triethanolamine in an amount to maintain the pH in the range 8 to 11; and of a di- or poly-hydroxy humectant, preferably glycerol or propylene glycol in an amount of 5-70% by weight.
371347
Combe Incorporated
Osler Hoskin & Harcourt Llp
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