Azomethine dye chromophores

US11344489B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Frank Bachmann · Glückstadt, DE
• Beate Froehling · Neustadt, DE
• Christian Cremer · Aachen, DE
• Marie-Pascale Perritaz · Basel, CH
• Volker Wendel · Seeheim-Jugenheim, DE

Key dates

• Filing date: Nov 21, 2019
• Grant date: May 31, 2022
• Expiry date: Nov 21, 2039

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/4324
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A composition for dyeing keratin fibres comprising a. at least one azomethine compound selected from compounds (3) and (4) and b. water. The composition may be used in a process for dyeing keratin fibres or, with simultaneous or sequential application of a composition comprising one or more oxidising agents, in a process for lightening keratin fibres.