Particular pyridinedicarboxylic acid derivative/antioxidant combination
AssigneeL'oreal
InventorFrancois MICHELET
Life of this patent
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Abstract
The invention relates to a cosmetic composition comprising one or more pyridinedicarboxylic acid derivatives of general formula (I) or a salt thereof and one or more antioxidants chosen from flavone heterosides, polyhydroxylated stilbenes, pyrimidinecarboxylic acid derivatives and ascorbic acid esters.
Claims13
Cosmetic composition comprising:
- one or more pyridinedicarboxylic acid derivatives of general formula (I) or a salt thereof:
- in which R1 and R2 represent, independently of each other, OH, OR′, —NH2, —NHR′ or —NR′R and
- R′ and R″ represent, independently of each other, a linear or branched, saturated or unsaturated C1-C18 alkyl group, or an aryl group, this alkyl or aryl group being optionally substituted with an OH, alkoxy, acyloxy, amino or alkylamino group, or R′ and R″ together represent a heterocycle, and
- one or more antioxidants chosen from flavone heterosides, polyhydroxylated stilbenes, pyrimidinecarboxylic acid derivatives and ascorbic acid esters.
Cosmetic composition according to any one of the preceding claims, characterized in that the salt of the derivative of formula (I) is a salt chosen from the sodium or potassium double salt, the zinc (Zn2+), calcium (Ca2+), copper (Cu2+), iron (Fe2+), strontium (Sr2+), magnesium (Mg2+) or manganese (Mn2+) salts, the triethanolamine, monoethanolamine, diethanolamine, hexadecylamine, N,N,N′,N′-tetrakis(2-hydroxypropyl)ethylenediamine and tris(hydroxylmethyl)aminomethane salts, hydroxides, carbonates and chlorides.
Composition according to one of the preceding claims, characterized in that the pyridinedicarboxylic acid derivative is chosen from:
- 2,4-pyridinedicarboxylic acid or the zinc or sodium salt thereof,
- 2,3-pyridinedicarboxylic acid or the zinc or sodium salt thereof,
- dimethyl 2,4-pyridinedicarboxylate,
- dimethyl 2,3-pyridinedicarboxylate,
- diethyl 2,4-pyridinedicarboxylate,
- diethyl 2,3-pyridinedicarboxylate,
- diisopropyl 2,4-pyridinedicarboxylate,
- 2,4-bis(n-propylamido)pyridine,
- di(acetyloxymethyl) 2,4-pyridinedicarboxylate,
- diethyl 2,5-pyridinedicarboxylate,
- dimethyl 2,5-pyridinedicarboxylate,
- 2,4-bis(2-hydroxyethylamido)pyridine, and
- 2,4-bis(3-hydroxypropylamido)pyridine.
Composition according to any one of the preceding claims, characterized in that the derivative is in ester form.
Composition according to one of the preceding claims, characterized in that the derivative is diethyl 2,4-pyridinedicarboxylate.
Composition according to one of the preceding claims, characterized in that the derivative(s) or a salt thereof are present in an amount ranging from 10−3% to 10% by weight, preferably from 0.1% to 8% by weight and better still from 0.5% to 5% by weight, relative to the total weight;
- of the composition.
Composition according to any one of the preceding claims, characterized in that the antioxidant is chosen from baicalin, resveratrol, ectoin and ascorbyl palmitate, and mixtures thereof.
Composition according to any one of the preceding claims, characterized in that the antioxidant(s) are present in an amount ranging from 0.1% to 15% by weight, preferably from 0.5% to 10% by weight and even better still from 0.7% to 6% by weight, relative to the total weight of the composition.
Cosmetic process for treating human keratin fibres and/or the scalp, comprising the application of a composition according to any one of the preceding claims to said fibres and/or the scalp.
Dependencies are inferred from the claim text.