The Procter Gamble Company

Wella Operations Us, LLC

Noxell Corporation

Wella International Operations Switzerland Sarl

Ingo Weber

Markus Speckbacher

Armin Osan

Wolfram Geibel

Mathias Kurt Herrlein

Simon Paul Godfrey

Lars Siegfried Dahne

Mandy Hecht

Matija Crne

Graham Neil Mckelvey

The instant disclosure generally relates to a dual component hair coloring composition for coloring mammalian or synthetic keratin fibers, the composition comprising composition A comprising a cationic polymer, pigment microparticles and an aqueous medium, and comprising composition B comprising an anionic polymer, aqueous medium and optional cross linking agent. Optionally or alternatively composition B may contain pigment particles. The cationic and anionic polymers are at least partially soluble in the medium and the pigment microparticles are dispersed therein. The hair coloring composition forms a dual layer coating upon application to keratin fibers such as hair and has a substantially permanent pigment lastingness following development (setting); minimally alters the keratin fibers, upon application; and substantially eliminates development time. Methods of using such compositions are also described herein.

Dual polymer component hair coloring composition

A method for treating hair comprising applying at least one pigment onto hair for providing the basis for colouring hair in a more reproducible and reliable manner independently from a user's initial hair colour.

Hair treatment method and kit thereof

1-hexyl-1H-pyrazole-4,5-diamine hemisulfate, as represented in formula (IX-a), and its use in oxidative dyeing composition. This pyrazole salt was found to combine good stability as raw material and good shade intensity with a range of common couplers when formulated in hair dyeing composition. 

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1-hexzl-1H-pyrazole-4,5-diamine hemisulfate, and its use in dyeing compositions

A telescoping synthesis of 5-amino-4-nitroso-1-alkyl-1H-pyrazole salt derivatives of formula (I), the compound (I) itself, and its use as an intermediate in the fabrication of 1-alkyl-4,5-diaminopyrazole salts of general formula (IX). The compounds of formula (IX) can be used as precursor dyes in oxidative hair dye compositions.  R is a mono- or poly-substituted or unsubstituted, straight or branched, saturated or mono- or poly-unsaturated, alkyl group. HZ and HZ' are organic or mineral acids.

Telescoping synthesis of 5-amino-4-nitroso-1-alkyl-1H-pyrazole salt

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Gruenstadt, Germany

Ingo Weber