摘要:
The invention relates to compositions for hair dyeing which contain, as the oxidative dye-stuff, in a cosmetically acceptable medium, para-phenylenediamine and ortho-aminophenol, or their cosmetically acceptable salts, in a ratio para-phenylenediamine/ortho-aminophenol which is such that, after the addition of an equal volume of hydrogen peroxide of 20 volumes strength and application to the hair for 30 minutes, no Bandrowsky's base can be detected in the oxidizing dyeing composition.The compositions according to the invention make it possible to impart background colorations to the hair without the formation of Bandrowsky's base.
摘要:
The invention provides a composition and process for directly dyeing keratinic fibres. The combination of 1-N-methylamino-2-nitro-4-N'-methyl-N'-(2' ,3'-dihydroxypropyl)amino benzene with certain 2-nitroparaphenylenediamine direct nitro dyes produces a dye composition in which the dyes can be more concentrated (without crystallizing out) and hence produce darker shades.
摘要:
Dyeing compositions are disclosed which comprise at least one oxidation dyestuff precursor in combination with at least one direct dyestuff, in an aqueous vehicle, the direct dyestuff being a nitro derivative of the benzene series having the formula: ##STR1## in which R.sub.1 denotes the methyl group, R.sub.2 and R.sub.4 denote hydrogen and R.sub.3 denotes the .beta.-hydroxyethoxy group, or alternatively R.sub.1, R.sub.3 and R.sub.4 denote hydrogen and R.sub.2 denotes the methyl or hydroxyl group, or alternatively R.sub.1 and R.sub.2 denote hydrogen, R.sub.3 denotes the methyl group and R.sub.4 denotes the hydroxyl, (.beta.-hydroxyethyl)-amino or (.beta.-N,N-diethylaminoethyl)-amino group, or R.sub.1, R.sub.2 and R.sub.3 denote hydrogen and R.sub.4 denotes the N,N-bis-(.beta.-hydroxyethyl)-amino group.
摘要:
The invention provides new chlorine-substituted nitro-para-phenylenediamines of the formula: ##STR1## in which R.sub.1 and R.sub.2, which are identical or different, denote hydrogen, a lower alkyl group or a monohydroxylated or polyhydroxylated alkyl group and n is an integer from 2 to 4, and the cosmetically acceptable salts of these compounds. These compounds can be used for hair dyeing.
摘要:
The present invention relates to new 1-(substituted phenoxy)-3-aminopropan-2-ol compounds in which the extra-nuclear amine group may or may not be substituted, and to the process for their preparation. The invention also relates to hair-dyeing compositions containing these new compounds and to a dyeing process using the said compositions.
摘要:
Novel meta-phenylenediamines are provided for use as couplers with dye bases in hair dye compositions. These meta-phenylenediamines have the formula: ##STR1## in which n is 2, 3 or 4. Their acid addition salts may also be used.
摘要:
A dyeing composition for keratinic fibers, especially human hair, comprising an aqueous solution containing a dyeing amount of at least one dye compound having the formula: ##STR1## in which R.sub.1 is --(CH.sub.2).sub.n --OR, R is methyl or ethyl, n is 2 or 3, or one of the corresponding acid salts.
摘要:
Couplers having the general formula (I): ##STR1## or the acid salts thereof in which formula R is either(a) hydrogen or(b) a C.sub.1 -C.sub.3 alkyl or(c) a C.sub.1 -C.sub.3 hydroxyalkyl, andZ is either(a) hydroxyalkyl, or(b) alkoxyalkyl in which the alkoxy group contains 1 to 2 carbon atoms, or(c) mesylaminoalkyl, or(d) acetylaminoalkyl, or(e) ureidoalkyl, or(f) carbethoxyaminoalkylthe alkyl groups in the radicals constituting Z comprising from 2 to 3 carbon atoms andZ is not hydroxyethyl when R is hydrogen.These couplers form dyeing compositions when mixed with an oxidation base consisting of a paraphenylenediamine having the general formula: ##STR2##
摘要:
A composition suitable for dyeing keratin fibres, especially human hair, is provided comprising a direct dyestuff and, as a levelling agent, a 2,5-dihydroxyphenylcarboxylic acid or a salt thereof.
摘要:
Chemical compounds of the formula: ##STR1## in which R.sub.1 and R.sub.2 can be identical or different and represent hydrogen or alkyl having from 1 to 4 carbon atoms. The compounds are used in hair dyeing, and a process for their preparation is disclosed.