Polymeric hair dyes

US8118883B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Sophie Marquais-Bienewald · Hégenheim, FR
• Christian Cremer · Aachen, DE
• Olof Wallquist · Basel, CH
• Robert Hochberg · Glückstadt, DE

Key dates

• Filing date: Jan 7, 2009
• Grant date: Feb 21, 2012
• Expiry date: Jan 7, 2029

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61Q5/12
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Disclosed are polymeric dyes obtained by the reaction of (a) a basic polycondensate with (b) an electrophilic dye of formula (2) P—X—Ya+ Ana+; wherein the basic polycondensate (a) is obtained by the reaction of (a1) an amine of formula (I) in the presence of an anhydrous solvent with an ammonium salt (a2) with a cyanamide:Wherein P, X, Y, a+, a, a1, a2, An, R1, R2, R3, R4, R5, R6 and A are defined in the claims and in the disclosure. The present invention also relates to compositions comprising these polymeric dyes, to a process for their use for dyeing of organic materials, such as keratin fibers, wool, leather, silk, cellulose or polyamides.