http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0441689-A1

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filingDate 1991-02-04-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2e14050f1cda649fd79d55711605c35a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6363b2bda85ce677bcd1bc11e57a74a8
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publicationDate 1991-08-14-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber EP-0441689-A1
titleOfInvention Process for enzymatic preparation of melanin pigment and its use in cosmetics
abstract R représente un atome d'hydrogène, un radical alkyle, alcoxy, hydroxyalkyle, SiR₄R₅R₆, aminoalkyle, ou un radical aryle non substitué ou substitué par OH, NH₂, alkyle, alcoxy ou NO₂; R₁ et R₂ représentent des groupements alkyle ou forment ensemble un groupement méthylène ou éthylène, éventuellement substitué par un ou plusieurs groupements alkyle, R₃ représente hydrogène ou COOH, en présence d'un milieu oxydant et d'une enzyme à activité (per)oxydante ou d'un composé ayant une activité similaire, ainsi qu'à des poudres les mettant en oeuvre et leur utilisation cosmétique. The invention relates to a process for the preparation of a melanin pigment, comprising the polymerization of a compound corresponding to the formula: in which : R represents a hydrogen atom, an alkyl, alkoxy, hydroxyalkyl, SiR₄R₅R₆, aminoalkyl radical, or an aryl radical unsubstituted or substituted by OH, NH₂, alkyl, alkoxy or NO₂; R₁ and R₂ represent alkyl groups or together form a methylene or ethylene group, optionally substituted by one or more alkyl groups, R₃ represents hydrogen or COOH, in the presence of an oxidizing medium and an enzyme with (per) oxidizing activity or a compound having a similar activity, as well as powders using them and their cosmetic use.
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priorityDate 1990-02-05-04:00^^<http://www.w3.org/2001/XMLSchema#date>
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Total number of triples: 64.