Ciba Specialty Chemicals Corporation

Wella Germany Gmbh

Hfc Prestige International Holding Switzerland S.a.r.l

Markus Speckbacher

Heinz Langhals

Ingo Weber

Mathias Kurt Herrlein

Matija Crne

Corinne Mohr

Simon Paul Godfrey

Andrej Gross

Malte Afflerbach

Petra Christa Von Unold

Petra Braun

Yan Wang

Petra Barbara Braun

Susanne Kirner

Patrick Blanke

Sonja Telser

Heike Abel

Armin Osan

Gerd Schlotzhauer

Tatjana Schaefer

The disclosure relates to methods for coloring keratinous substrates using solubilized vat dyes, as well as compositions and kits suitable for carrying out the methods. The disclosure also relates to novel solubilized vat dyes.

Method and composition for coloring a keratinous substrate using solubilized vat dyes

The invention relates to processes for preparing 2-methoxymethyl-p-phenylenediamine (I), cosmetically acceptable salts thereof, or mixtures thereof.

Telescoping syntheses of 2-methoxymethyl-p-phenylenediamine

The instant disclosure generally relates to a coloring composition for coloring mammalian or synthetic keratin fibers or keratinous surfaces. The composition comprising a medium, optionally pigment microparticles and at least one dye, in particular at least one peri-arylene dye dissolved in the medium. Methods of using such compositions are also described herein.

Hair coloring composition and methods for its application and removal

Core-extended perylene bisimides

A process for forming perylene-3, 4-dicarboxylic anhydrides by reacting a corresponding perylene-3,4:9, 10-tetracarboxylic dianhydride with a sterically hindered amine, as a base, at an elevated temperature.

Preparation of perylene-3,4-dicarboxylic anhydrides

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Mettenheim-Hart, Germany

Markus Speckbacher