Abstract: The present invention relates to hair colouring compositions free of resorcinol, 2-methyl resorcinol, 4-chloro resorcinol and resorcinol derivatives and free of methoxymethyl-p-phenylenediamine, said compositions comprising at least three dyes selected from at least one primary dye selected from p-toluenediamine sulphate, p-aminophenol, N-methyl-p-aminophenol sulphate and 1-hydroxyethyl-4,5-diamino pyrazole sulphate, and at least two secondary dyes selected from hydroxyethyl 3,4-methylenedioxyaniline HCl, 2-amino-3-hydroxypyridine and 2-methyl-5-hydroxyethylaminophenol, or at least two primary dyes selected from p-toluenediamine sulphate, p-aminophenol, N-methyl-p-aminophenol sulphate and 1-hydroxyethyl-4,5-diamino pyrazole sulphate, and at least one secondary dye selected from hydroxyethyl 3,4-methylenedioxyaniline HCl, 2-amino-3-hydroxypyridine and 2-methyl-5-hydroxyethylaminophenol.

Abstract: Disclosed is a hair colouring composition containing amino acids with at least a pKa greater than 10, oxidative dyes, and acetylaspartic acid or salts thereof. The compositions according to the invention do not contain ammonia or ethanolamine, do not damage the hair, guarantee shine and combability, and also cover white hair and withstand blue light.

Abstract: The present invention relates to hair colouring compositions free of resorcinol, 2-methyl resorcinol, 4-chloro resorcinol and resorcinol derivatives and free of methoxymethyl-p-phenylenediamine, said compositions comprising at least three dyes selected from at least one primary dye selected from p-toluenediamine sulphate, p-aminophenol, N-methyl-p-aminophenol sulphate and 1-hydroxyethyl-4,5-diamino pyrazole sulphate, and at least two secondary dyes selected from hydroxyethyl 3,4-methylenedioxyaniline HCl, 2-amino-3-hydroxypyridine and 2-methyl-5-hydroxyethylaminophenol, or at least two primary dyes selected from p-toluenediamine sulphate, p-aminophenol, N-methyl-p-aminophenol sulphate and 1-hydroxyethyl-4,5-diamino pyrazole sulphate, and at least one secondary dye selected from hydroxyethyl 3,4-methylenedioxyaniline HCl, 2-amino-3-hydroxypyridine and 2-methyl-5-hydroxyethylaminophenol.

Abstract: Disclosed are m-aminophenol-free hair-colouring compositions comprising a mixture of dyes consisting of methoxymethyl-p-phenylenediamine, hydroxyethyl-3,4-methylenedioxyaniline and 5-amino-6-chloro-o-cresol, an alkalising agent, and optionally other oxidative dyes, provided that they are not p-phenylenediamine or p-toluenediamine The compositions according to the invention provide stable colours that do not change with time.

Abstract: Disclosed is a hair colouring composition containing amino acids with at least a pKa greater than 10, oxidative dyes, and acetylaspartic acid or salts thereof. The compositions according to the invention do not contain ammonia or ethanolamine, do not damage the hair, guarantee shine and combability, and also cover white hair and withstand blue light.

Abstract: Disclosed are hair-colouring compositions comprising an oxidative dye and an alkalising agent consisting of isopropanolamine and a malic acid diester. The compositions according to the invention, due to synergic effects between isopropanolamine and the malic acid diester, are advantageous, because they lighten the hair by up to four levels, do not have an unpleasant odour, and limit the damage caused to the hair, maintaining its integrity and consequently its natural characteristics of elasticity, shine and combability.

Abstract: Disclosed are m-aminophenol-free hair-colouring compositions comprising a mixture of dyes consisting of methoxymethyl-p-phenylenediamine, hydroxyethyl-3,4-methylenedioxyaniline and 5-amino-6-chloro-o-cresol, an alkalising agent, and optionally other oxidative dyes, provided that they are not p-phenylenediamine or p-toluenediamine The compositions according to the invention provide stable colours that do not change with time.

Abstract: Disclosed are hair-colouring compositions comprising an oxidative dye and an alkalising agent consisting of isopropanolamine and a malic acid diester. The compositions according to the invention, due to synergic effects between isopropanolamine and the malic acid diester, are advantageous, because they lighten the hair by up to four levels, do not have an unpleasant odour, and limit the damage caused to the hair, maintaining its integrity and consequently its natural characteristics of elasticity, shine and combability.

Abstract: The present invention refers to a hair dye comprising a) an alkalinising agent consisting of at least one amino acid having a pKa of greater than 10.00 and at least one ester of a fatty acid and glycerol polyethoxylate; and b) at least one oxidation colourant. In particular, the composition of the invention does not comprise any further alkalinizing agent. Kits and methods for colouring hair based on this composition also fall within the scope of this invention.

Abstract: The present invention refers to a hair dye comprising a) an alkalinising agent consisting of at least one amino acid having a pKa of greater than 10.00 and at least one ester of a fatty acid and glycerol polyethoxylate; and b) at least one oxidation colourant. In particular, the composition of the invention does not comprise any further alkalinizing agent. Kits and methods for colouring hair based on this composition also fall within the scope of this invention.

Abstract: The present invention relates to ready-to-use gel compositions for coloring hair in the form of an aqueous solution comprising: at least one Acrylates/Methacrylamide Copolymer; at least one cellulose derivative; at least one cross-linked polymer of acrylic acid or methacrylic acid or salts thereof; at least one oxidation dye and optionally at least one direct dye; at least one alkalizing agent; hydrogen peroxide or an hydrogen peroxide adduct.

Abstract: Disclosed is a hair colouring method which comprises application to the hair of at least one dye of formula I and/or II combined with a coupler of formula III: wherein R1-R6 and X are as defined in the description.

Abstract: The present invention relates to ready-to-use gel compositions for coloring hair in the form of an aqueous solution comprising: at least one Acrylates/Methacrylamide Copolymer; at least one cellulose derivative; at least one cross-linked polymer of acrylic acid or methacrylic acid or salts thereof; at least one oxidation dye and optionally at least one direct dye; at least one alkalizing agent; hydrogen peroxide or an hydrogen peroxide adduct.

Abstract: The present invention relates to methods of dyeing the hair with oxidative dyes devoid of p-ph enylenediamine and p-toluenediamine and containing N,N-bis(2-hydroxyethyl)-p-phenylenediamine, p-aminophenol, 4-amino-m-cresol, hydroxyethyl-p-phenylenediamine, 1-hydroxyethyl-4,5-diamino pyrazole, 4-chlorine-resorcinol, 2-methylresorcinol, 2,4-diaminophenoxyethanol and 2-amino-3-hydroxypyridine, which possess an improved sensitising power and can be used in mixtures of the various shades with predictable results.

Abstract: The present invention relates to whitening compositions, processes for obtaining such compositions, stable aqueous solutions of such compositions and the use of such compositions for whitening of textile fibers, paper and in detergency.

Abstract: Disclosed is a crystalline form of the compound of formula (I), characterised by an endothermic melting transition between 20 and 30 J/g at temperatures from 125° C. to 135° C., determined by differential scanning calorimetry (DSC) and by its X-ray diffraction spectrum.

Abstract: The present invention relates to whitening compositions, processes for obtaining such compositions, stable aqueous solutions of such compositions and the use of such compositions for whitening of textile fibers, paper and in detergency.

Abstract: Disclosed are oligomeric compounds obtained by condensation of the compound of formula (I) with itself wherein R1 and R2 are C1-C22 alkyl, isoalkyl or cycloalkyl groups.

Abstract: Disclosed is an amorphous solid form of the compound of formula (I), characterised by an exothermic transition at temperatures lower than 125° C., determined by differential scanning calorimetry (DSC).