Preservative systems comprising cationic surfactants

A - Human Necessities – 61 – K

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A61K 8/44 (2006.01) A23L 3/00 (2006.01) A61K 8/49 (2006.01) A61Q 19/10 (2006.01)

Patent

CA 2614978

Preservative systems on the basis of cationic surfactants are known i n the art, a typical example of such cationic surfactants is the ethyl ester of the lauramide of arginine monohydrochloride ( LAE ) (2). Besides the chloride form the corresponding bromide and sulphate salts are known. It was found that other salts of the cationic surfactants display excellent properties, such as the salts oflactic acid, glutamic acid and acetic acid. It was further found that the combination of the cationic surfactants with at least one salt of an organic or inorganic acid displayed an excellent preservative action. A further preservative system with favourable properties was the combination of the cationic surfactants with at least one ester compound, amide or enzyme inhibitor. Also the combination of the cationic surfactant with a further cationic molecule such as ethyl arginate, glucosamine or chitosan led to an effective preservative system. A further effective preservative system turned out to be the cationic surfactant in encapsulated form.

Des systèmes de conservation à base de tensioactifs cationiques sont connus dans l'état de la technique, un exemple typique desdits tensioactifs cationiques étant l'ester d'éthyle du lauramide de monohydrochlorure d'arginine (LAE) (2). En plus de la forme chlorure, les sels de bromure et de sulfate correspondants sont connus. On a découvert que d'autres sels des tensioactifs cationiques présentent d'excellentes propriétés, tels que les sels d'acide lactique, d'acide glutamique et d'acide acétique. On a également découvert que la combinaison des tensioactifs cationiques avec au moins un sel d'un acide organique ou inorganique présente une action de conservation excellente. Un autre système de conservation présentant des propriétés favorables est obtenu par la combinaison des tensioactifs cationiques avec au moins un composé d'ester, un amide ou un inhibiteur d'enzymes. La combinaison du tensioactif cationique avec une autre molécule cationique telle que de l'arginate d'éthyle, de la glucosamine ou du chitosan donne également un système de conservation efficace. Un autre système de conservation efficace s'est révélé être le tensioactif cationique sous forme encapsulée.

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