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US 5,496,377 AGranted
Process for the direct dyeing of keratinous fibres using water vapor
AssigneeL'oreal
InventorsHenri Samain, Jean-Michel Sturla
Life of this patent
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Abstract
A process for the direct dyeing (or colouring) of keratinous fibres, in particular human keratinous fibres, comprising the step of: directly dyeing the fibres by contacting the fibres (1) with a composition containing at least one direct dye chosen from specific 2-nitro-para-phenylenediamine derivatives and/or nitro derivatives of specific aminophenols, and (2) with a gas containing water vapour, the temperature of the gas being at least 75.degree. C. and the contact time between the gas and the fibres to be dyed not exceeding two minutes. The hair is dyed uniformly over the whole head of hair, from the roots to the ends, regardless of the condition of the hair.
Claims28
A process for the direct dyeing of keratinous fibres to lower selectivity thereon, comprising the step of:
- directly dyeing said fibres to lower said selectivity, said fibres having previously been contacted with a composition containing at least one direct dye selected from the 2-nitro-para-phenylene-diamine derivatives of formula (I) and the nitro aminophenol derivatives of formula (II):
- ##STR2## in which:
- R.sub.1 is selected from C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl, C.sub.2 -C.sub.4 polyhydroxyalkyl radicals, C.sub.1 -C.sub.4 (C.sub.1 -C.sub.4 alkoxy) alkyl radicals and C.sub.1 -C.sub.4 aminoalkyl radicals;
- R.sub.2 and R.sub.3 are selected from C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl and C.sub.2 -C.sub.4 polyhydroxyalkyl radicals with the proviso that when one of R.sub.2 or R.sub.3 is C.sub.1-4 alkyl, the other is C.sub.2-4 monohydroxyalkyl or C.sub.2-4 polyhydroxyalkyl;
- R.sub.4 and R.sub.5 are selected from hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl, C.sub.2 -C.sub.4 polyhydroxyalkyl, and C.sub.1 -C.sub.4 aminoalkyl radicals;
- and R.sub.6 is selected from hydrogen, C.sub.1 -C.sub.4 alkyl radicals, halogen atoms, and an NO.sub.2 group, by contacting said fibres with a gas containing water vapour, the temperature of the gas being greater than 75.degree. C., for a contact time between said gas and said fibres to be dyed of less than two minutes.
3 more elements
A process for the direct dyeing of keratinous fibres to lower selectivity thereon, comprising the step of:
- directly dyeing said fibres to lower said selectivity, by contacting said fibres (1) with a composition containing at least one direct dye selected from the 2-nitro-para-phenylenediamine derivatives of formula (I) and the nitro aminophenol derivatives of formula (II):
- ##STR3## in which:
- R.sub.1 is selected from C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl, C.sub.2 -C.sub.4 polyhydroxyalkyl radicals, C.sub.1 -C.sub.4 (C.sub.1 -C.sub.4 alkoxy) alkyl radicals and C.sub.1 -C.sub.4 aminoalkyl radicals;
- R.sub.2 and R.sub.3 are selected from C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl and C.sub.2 -C.sub.4 polyhydroxyalkyl radicals with the proviso that when one of R.sub.2 or R.sub.3 is C.sub.1-4 alkyl, the other is C.sub.2-4 monohydroxyalkyl or C.sub.2-4 polyhydroxyalkyl;
- R.sub.4 and R.sub.5 are selected from hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl, C.sub.2 -C.sub.4 polyhydroxyalkyl, and C.sub.1 -C.sub.4 aminoalkyl radicals;
- and R.sub.6 is selected from hydrogen, C.sub.1 -C.sub.4 alkyl radicals, halogen atoms, and an NO.sub.2 group;
- and (2) with a gas containing water vapour, the temperature of the gas and the contact time between said gas and said fibres being sufficient to lower said selectivity.
4 more elements
A process for the direct dyeing of keratinous fibres to lower selectivity thereon, comprising the step of:
- directly dyeing said fibres to lower said selectivity, by contacting said fibres (1) with a composition containing at least one direct dye selected from the 2-nitro-para-phenylenediamine derivatives of formula (I) and the nitro aminophenol derivatives of formula (II):
- ##STR4## in which:
- R.sub.1 is selected from C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl, C.sub.2 -C.sub.4 polyhydroxyalkyl radicals, C.sub.1 -C.sub.4 (C.sub.1 -C.sub.4 alkoxy) alkyl radicals and C.sub.1 -C.sub.4 aminoalkyl radicals;
- R.sub.2 and R.sub.3 are selected from C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl and C.sub.2 -C.sub.4 polyhydroxyalkyl radicals with the proviso that when one of R.sub.2 or R.sub.3 is C.sub.1-4 alkyl, the other is C.sub.2-4 monohydroxyalkyl or C.sub.2-4 polyhydroxyalkyl;
- R.sub.4 and R.sub.5 are selected from hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl, C.sub.2 -C.sub.4 polyhydroxyalkyl, and C.sub.1 -C.sub.4 aminoalkyl radicals;
- and R.sub.6 is selected from hydrogen, C.sub.1 -C.sub.4 alkyl radicals, halogen atoms, and an NO.sub.2 group;
- and (2) with a gas containing water vapour, the temperature of said gas being at least 75.degree. C. and the contact time between said gas and said fibres being sufficient at said temperature to lower said selectivity.
4 more elements
A process for the direct dyeing of keratinous fibres to lower selectivity thereon, comprising the step of:
- directly dyeing said fibres to lower said selectivity, by contacting said fibres (1) with a composition containing at least one direct dye selected from the 2-nitro-para-phenylenediamine derivatives of formula (I) and the nitro aminophenol derivatives of formula (II):
- ##STR5## in which:
- R.sub.1 is selected from C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl, C.sub.2 -C.sub.4 polyhydroxyalkyl radicals, C.sub.1 -C.sub.4 (C.sub.1 -C.sub.4 alkoxy) alkyl radicals and C.sub.1 -C.sub.4 aminoalkyl radicals;
- R.sub.2 and R.sub.3 are selected from C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl and C.sub.2 -C.sub.4 polyhydroxyalkyl radicals with the proviso that when one of R.sub.2 or R.sub.3 is C.sub.1-4 alkyl, the other is C.sub.2-4 monohydroxyalkyl or C.sub.2-4 polyhydroxyalkyl;
- R.sub.4 and R.sub.5 are selected from hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl, C.sub.2 -C.sub.4 polyhydroxyalkyl, and C.sub.1 -C.sub.4 aminoalkyl radicals;
- and R.sub.6 is selected from hydrogen, C.sub.1 -C.sub.4 alkyl radicals, halogen atoms, and an NO.sub.2 group;
- and (2) with a gas containing water vapour, for a time not exceeding two minutes, and wherein said gas has a sufficient temperature for said time to lower said selectivity.
4 more elements
A process for the direct dyeing of keratinous fibres to lower selectivity thereon, comprising the step of:
- directly dyeing said fibres to lower said selectivity, by contacting said fibres (1) with a composition containing at least one direct dye selected from the 2-nitro-para-phenylenediamine derivatives of formula (I) and the nitro aminophenol derivatives of formula (II):
- ##STR6## in which:
- R.sub.1 is selected from C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl, C.sub.2 -C.sub.4 polyhydroxyalkyl radicals, C.sub.1 -C.sub.4 (C.sub.1 -C.sub.4 alkoxy) alkyl radicals and C.sub.1 -C.sub.4 aminoalkyl radicals;
- R.sub.2 and R.sub.3 are selected from C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl and C.sub.2 -C.sub.4 polyhydroxyalkyl radicals with the proviso that when one of R.sub.2 or R.sub.3 is C.sub.1-4 alkyl, the other is C.sub.2-4 monohydroxyalkyl or C.sub.2-4 polyhydroxyalkyl;
- R.sub.4 and R.sub.5 are selected from hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 monohydroxyalkyl, C.sub.2 -C.sub.4 polyhydroxyalky, and C.sub.1 -C.sub.4 aminoalkyl radicals;
- and R.sub.6 is selected from hydrogen, C.sub.1 -C.sub.4 alkyl radicals, halogen atoms, and an NO.sub.2 group;
- and (2) with a gas containing water vapour, the temperature of said gas being at least 75.degree. C., for a contact time between said gas and said fibres not exceeding two minutes.
4 more elements
Dependencies are inferred from the claim text.