Azo derivatives containing a pyrazolinone unit for dyeing keratin fibres

The subject of the present invention is azo derivatives containing a pyrazolinone unit having the following formula (I), their mesomeric forms, their addition salts with an acid and their solvates and their use for dyeing keratin fibers. The subject of the invention is also a composition for dying k...

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Main Authors Fadli, Aziz, Metais, Eric
Format Patent
LanguageEnglish
Published 11.10.2011
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Abstract The subject of the present invention is azo derivatives containing a pyrazolinone unit having the following formula (I), their mesomeric forms, their addition salts with an acid and their solvates and their use for dyeing keratin fibers. The subject of the invention is also a composition for dying keratin fibers comprising at least one azo derivative containing a pyrazolinone unit of formula (I) as direct dye, and the method for dyeing keratin fibers using this composition. The present invention makes it possible in particular to obtain chromatic colors that are resistant to the various attacks to which the hair may be subjected, in particular to shampoos and to light.
AbstractList The subject of the present invention is azo derivatives containing a pyrazolinone unit having the following formula (I), their mesomeric forms, their addition salts with an acid and their solvates and their use for dyeing keratin fibers. The subject of the invention is also a composition for dying keratin fibers comprising at least one azo derivative containing a pyrazolinone unit of formula (I) as direct dye, and the method for dyeing keratin fibers using this composition. The present invention makes it possible in particular to obtain chromatic colors that are resistant to the various attacks to which the hair may be subjected, in particular to shampoos and to light.
Author Metais, Eric
Fadli, Aziz
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References STIC Search Report dated Nov. 9, 2010.
A.A. Elbahnsawy et al., "Utility of 5-antipyrylazopyridin-2-thione: Synthesis of 5-antipyrylazothineno [2,3-b] Pyridines and 4-antipyrylazopyrido [3-4-d} Pyridazine Derivatives," Indian Journal of Heterocyclic Chemistry, vol. 10, pp. 135-140 (2000).
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(WO 2006/082229) 20060800
Smaglyuk et al., "Antipyrine azo derivatives. Spectrophometric study and use in analysis." Zurnal Analiticeskoj Himii, Nauka, Moscow, Ru, vol. 30, No. 9, pp. 1680-1688 (1975).
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