Abstract: This invention is directed to compositions of the developer-coupler type of the dyeing of hair consisting essentially of bis-(2,4-diaminophenyl)-alkanes or salts thereof as coupling components and, as developer components, the conventional components used in oxidation dyes.

Abstract: Hair coloring preparations containing substantive hair dyes corresponding to the following general formula ##STR1## in which A is an SO.sub.3 H group or a COOH group, and R.sup.1 and R.sup.2 are hydrogen or other substituents, show high fastness properties and favorable toxicological properties. The substantive hair dyes are preferably present in the hair coloring preparations in a quantity of from 0.01 to 5.0% by weight, optionally in conjunction with known oxidation hair dye precursors.

Abstract: This invention is directed to compositions of the developer-coupler type of the dyeing of hair consisting essentially of resorcinol derivatives or salts thereof as coupling components and, as developer components, the conventional components used in oxidation dyes.

Abstract: Hair dyes containing oxidation dye precursors in a cosmetic carrier contain as coupler substances compounds corresponding to formula I ##STR1## in which Z is a sulfur atom, an >SO group or an >SO.sub.2 group or salts thereof. As developer substances, the hair dyes contain the developers normally used in oxidation hair dyes, preferably aromatic and/or heterocyclic diamines or a 2,4,5,6-tetraamino pyrimidine. The new couplers produce color tones in the brown range with good fastness properties and a negligible tendency towards skin staining.

Abstract: This invention is directed to a composition of the developer-coupler type for the dyeing of hair, consisting essentially of, as coupler, at least on N-benzyl-m-phenylenediamine derivative of general formula ##STR1## wherein Ar is a radical selected from the group consisting of ##STR2## or an inorganic or organic acid salt thereof, and, as developer component, one or more of the conventional developer components used in oxidation dyes.

Abstract: This invention is directed to compositions of the developer-coupler type for the dyeing of hair, consisting essentially of substituted benzotriazoles as coupling components and, as developer components, the conventional components used in oxidation dyes.

Abstract: This invention is directed to novel bis-(2,4-diaminophenoxy)-alkanes and a method of preparing them. This invention is also directed to the use of said bis-(2-4-diaminophenoxy)-alkanes, or the salts thereof, as coupler components in developer-coupler oxidation hair dyeing compositions.

Abstract: An aqueous hair dye preparation comprising an oxidation dyestuff combination of a developer component and a coupler component consisting of an N,N-bis-(.beta.-hydroxyethyl)-m-phenylenediamine as well as a process for dyeing hair by utilizing this oxidation dyestuff combination.

Abstract: A two-component composition for bleaching hair comprising a peroxide oxidation agent, an ammonia-free alkalinization agent and a guanidine derivative of the formula ##STR1## as bleaching accelerator, wherein R is hydrogen, ##STR2## Y is hydrogen, NH.sub.2, or akyl having 1 to 4 carbon atoms, and n is 2 or 3, or an acid addition salt thereof.

Abstract: An aqueous hair dye preparation comprising an oxidation dyestuff combination of a developer component consisting of a tetraaminopyrimidine derivative or a water-soluble acid addition salt thereof and as coupler, at least one of the following:(a) 2,4-diaminophenol(b) 2,4-diamino-3-chlorophenol(c) 2-amino-4-methylphenol(d) 3-amino-2,6-dimethylphenol(e) 2,2',4,4'-tetrahydroxybenzophenone(f) 2,4-diamino-6-methylphenol(g) 3,4-diaminophenetole(h) 1,3-dihydroxy-5-methylaminobenzene(i) 1-hydroxy-7-aminonaphthalene(j) 1-hydroxy-8-aminonaphthalene(k) 1,6-dihydroxynaphthalene(l) 2,7-dihydroxynaphthalene(m) 3,5-dimethoxyphenol,as well as a process for dyeing hair by utilizing this oxidation dyestuff combination.

Abstract: A composition for bleaching hair comprising a peroxide oxidation agent, an ammonia-free alkalinization agent and a guanidine derivative of the formula ##STR1## as bleaching accelerator, wherein R is hydrogen, ##STR2## Y is hydrogen, NH.sub.2, or alkyl having 1 to 4 carbon atoms, and n is 2 or 3, or an acid addition salt thereof.

Abstract: Dyestuffs of the oxidizable developer-coupler type wherein the coupler is a 3,5-diamino-2-substituted-alkylbenzene of the formula ##STR1## wherein R.sub.1 is straight- or branched-chain alkyl of 1-8 carbon atoms, R.sub.2 is a straight- or branched-chain alkyl of 1-8 carbon atoms, phenyl, or phenyl substituted by alkyl of 1-4 carbon atoms or halogen atoms and the inorganic and organic salts thereof are very satisfactory for coloring hair. They are readily oxidized by atmospheric oxygen at room temperature without a catalyst, and they provide intense, bright and fast dyeings in a short tie. They are applied in conventional manner from an aqueous medium.

Abstract: Compositions for changing the color of hair by the action (direct or indirect) of compounds therein which release nascent oxygen, do less harm to the hair when they have a content of a water-soluble 3-amino-1-hydroxypropane-1,1-diphosphonic compound. The compound can be in free acid or water-soluble salt or partial ester form. Hair which is pre-treated with one of the mentioned diphosphonic compounds is at least partially protected against the action of nascent oxygen.

Abstract: Oxidizable developer-coupler combinations wherein the coupler is a water-soluble polyhalogen 3-aminophenol are stable in the absence of free oxygen and chemical oxidizing agents. They provide hair dyeings of specially desirable shades. The dyeings are color fast, wash-fast, thermostable, and non-toxic. The combinations can be applied in customary vehicles. Their dyeing properties are developed by air oxidation, by peroxides, or by both at an acid, neutral or alkaline pH.

Abstract: An aqueous hair dye preparation comprising an oxidation dyestuff combination of a developer component consisting of a tetraaminopyrimidine derivative or a water-soluble acid addition salt thereof and a coupler component consisting of a mono- and/or dialkyl-m- dihydroxybenzene, wherein the alkyl radical has 1-4 carbon atoms; as well as a process for dyeing hair by utilizing this oxidation dyestuff combination.