COMPOSITION TINCTORIALE POUR FIBRES KERATINIQUES RENFERMANT AU MOINS UNE NITRO-2 PARAPHENYLENEDIAMINES N-SUBSTITUEE COSOLUBILISEE ET PROCEDES DE TEINTURE DE FIBRES KERATINIQUES CORRESPONDANTS

• Main Author: JEAN-FRANCOIS GROLLIER, JEAN COTTERET ET GEORGES ROSENBAUM
• Format: Patent
• Language: French
• Published: 24.12.1987
• Edition: 4
• Subjects: ADHESIVES; CHEMISTRY; DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM; DYEING OR PRINTING TEXTILES; DYES; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; HUMAN NECESSITIES; HYGIENE; LAKES; LAUNDERING; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; PAINTS; POLISHES; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS; TEXTILES; TREATMENT OF TEXTILES OR THE LIKE

The invention relates to a dyeing composition for keratinous fibres containing, in a suitable vehicle, at least one nitrated direct dye of the 2-nitro-paraphenylenediamine series, in which the amino group in position 4 is mono- or disubstituted with lower alkyl or hydroxyalkyl radicals and in which the amino group in position 1 is optionally monosubstituted with a lower alkyl or hydroxyalkyl radial, and the aromatic ring can be substituted or unsubstituted on the remaining positions; the invention consists in introducing into such a composition an imidazolidinedione or one of its substitution derivatives, to improve the solubility of the abovementioned nitrated direct dye by a co-solubilization phenomenon. The invention also relates to a process for dyeing keratinous fibres using such compositions.