Use of cationic surfactants in cosmetic preparations
AssigneeLaboratorios Miret, S.A.
InventorsJoan Baptista Urgell Beltran, Joan Seguer Bonaventrua
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Abstract
The invention relates to a new use of cationic surfactants derived from the condensation of fatty acids and esterified dibasic amino acids, according to the following formula: 1 where: X− is Br−, Cl−, or HSO4−. R1: is linear alkyl chain from a saturated fatty acid, or hydroxyacid from 8 to 14 atoms of carbon bonded to the α-amino acid group through amidic bond. R2: is a lineal or branched alkyl chain from 1 to 18 carbon atoms or aromatic, and R3: is: 2 and n can be from 0 to 4. This class of compounds turned out to be highly suitable for use as preservatives in cosmetic or dermatological preparations. A particularly suitable compound is the ethyl ester of the lauramide of arginine hydrochloride (LAE).
Claims7
Use of cationic surfactants derived from the condensation of fatty acids and esterified dibasic amino acids, according to the following formula:
- 6
- where:
- X− is Br−, Cl−, or HSO4−
- R1:
- is linear alkyl chain from an saturated fatty acid, or hydroxyacid from 8 to 14 atoms of carbon bonded to the α-amino acid group through amidic bond.
- R2:
- is a lineal or branched alkyl chain from 1 to 18 carbon atoms or aromatic.
- R3:
- is:
- 7
- and n can be from 0 to 4,
- as preservatives in cosmetic or dermatological preparations.
Dependencies are inferred from the claim text.