Cosmetic preparations containing silicone compounds and esters of hydroxycarboxylic acids and alk(en)yl oligoglycosides

A cosmetic preparation comprising:

• (a) an ester which is a reaction product of an alk(en)yl oligoglycoside
• and a hydroxycarboxylic acid selected from the group consisting of malic acid, tartaric acid, citric acid, and mixtures thereof;
• the ester corresponding to the general formula (I):
• wherein X represents a hydrogen or a —CH2COOR3 substituent, Y represents a hydrogen or a hydroxyl substituent, R1, R2 and R3 each independently represents a substituent selected from the group consisting of hydrogen, alkali metals, alkaline earth metals, ammonium, alkyl ammoniums, hydroxyalkyl ammoniums, glucammonium, and residues of alk(en)yl oligoglycosides corresponding to the general formula (II):
• R4O—[G]p— (II)
• wherein R4 represents an alk(en)yl group having from 8 to 16 carbon atoms, G represents a sugar unit containing 6 carbon atoms and p is a number of from 1 to 3;
• wherein at least one of R1, R2 and R3 represents a residue of an alk(en)yl oligoglycoside corresponding to the general formula (II), and with the proviso that, where X represents a —CH2COOR3 group, Y is hydrogen;
• and
• (b) a silicone compound;
• and
• (c) an unesterified alk(en)yl oligoglycoside corresponding to the general formula (II), present in an amount of from 5 to 25% by weight, based on the ester and silicone compound combined;
• wherein the ester and the silicone compound are present in a ratio by weight of from 25:75 to 75:25.

A method of preparing a cosmetic emulsion, said method comprising:

• (a) providing a silicone compound;
• (b) providing an ester corresponding to the general formula (I):
• wherein X represents a hydrogen or a —CH2COOR3 substituent, Y represents a hydrogen or a hydroxyl substituent, R1, R2 and R3 each independently represents a substituent selected from the group consisting of hydrogen, alkali metals, alkaline earth metals, ammonium, alkyl ammoniums, hydroxyalkyl ammoniums, glucammonium, and residues of alk(en)yl oligoglycosides corresponding to the general formula (II):
• R4O—[G]p— (II)
• wherein R4 represents an alk(en)yl group having from 4 to 22 carbon atoms, G represents a sugar unit containing 5 or 6 carbon atoms and p is a number of from 1 to 10;
• wherein at least one of R1, R2 and R3 represents a residue of an alk(en)yl oligoglycoside corresponding to the general formula (II), and with the proviso that, where X represents a —CH2COOR3 group, Y is hydrogen;
• and
• (c) mixing the silicone compound and the ester together to form an emulsion.