Quaternary surfactant concentrates
View Patent ↗Quaternary surfactants of the formula (I), wherein R 1 CO is a linear or branched, saturated or unsaturated, optionally hydroxy-functionalized acyl radical having 6 to 22 carbon atoms and 0, 1, 2 or 3 double bonds, R 2 is a CH 2 COOH radical, an alkyl radical having 1 to 4 carbon atoms, a CH 2 CH 2 OH or a CH 2 CH 2 OCH 2 CH 2 OH group, and X is halide, alkyl sulfate, alkyl carbonate or alkyl phosphate, are useful as surfactants in cosmetic and pharmaceutical preparations. Aqueous solutions above 50% by weight of the surfactants are flowable and pumpable.
1. A surfactant concentrate consisting of:
(a) greater than 50% by weight of one or more quaternary surfactants of formula (I),
wherein R 1 CO is a linear, saturated, optionally hydroxy-functionalized acyl moiety having 6 to 22 carbon atoms, R 2 is C 1-4 alkyl, CH 2 CH 2 OH or CH 2 CH 2 OCH 2 CH 2 OH, and X is halide, alkyl sulfate, alkyl carbonate or alkyl phosphate; and
(b) water,
and wherein said concentrate is flowable and/or pumpable, with a Brookfield viscosity of less than 10000 mPas.
2. The surfactant concentrate of claim 1 wherein R 2 in said quaternary surfactant of the formula (I) is a C1-C4 alkyl group.
3. The surfactant concentrate of claim 1 wherein R 2 in said quaternary surfactant of the formula (I) is CH 2 CH 2 OH or CH 2 CH 2 OCH 2 CH 2 OH.
4. A cosmetic or pharmaceutical preparation comprising the surfactant concentrate of claim 1 .
5. The surfactant concentrate of claim 1 wherein R 1 CO in said quaternary surfactant of formula (I) comprises hydrogenated coconut fatty acid moieties.
6. The surfactant concentrate of claim 1 wherein said concentrate is transparent and remains transparent even upon prolonged storage at elevated temperature.
7. A surfactant concentrate consisting of:
(a) greater than 50% by weight of one or more quaternary surfactants of formula (I),
wherein R 1 CO is a linear, saturated, optionally hydroxy-functionalized acyl moiety having 6 to 22 carbon atoms, R 2 is C 1-4 alkyl, CH 2 CH 2 OH or CH 2 CH 2 OCH 2 CH 2 OH, and X is halide, alkyl sulfate, alkyl carbonate or alkyl phosphate; and
(b) aqueous alcohol,
wherein the alcohol is selected from the group consisting of ethanol, isopropanol, and propylene glycol,
and wherein said concentrate is flowable and/or pumpable, with a Brookfield viscosity of less than 10000 mPas.
8. The surfactant concentrate of claim 7 , wherein said alcohol is ethanol.
9. The surfactant concentrate of claim 7 , wherein said alcohol is isopropanol.
10. The surfactant concentrate of claim 7 wherein R 2 in said quaternary surfactant of the formula (I) is a C1-C4 alkyl group.
11. The surfactant concentrate of claim 7 wherein R 2 in said quaternary surfactant of the formula (I) is CH 2 CH 2 OH or CH 2 CH 2 OCH 2 CH 2 OH.
12. A cosmetic or pharmaceutical preparation comprising the surfactant concentrate of claim 7 .
13. The surfactant concentrate of claim 7 wherein R 1 CO in said quaternary surfactant of formula (I) comprises hydrogenated coconut fatty acid moieties.
14. The surfactant concentrate of claim 7 wherein said concentrate is transparent and remains transparent even upon prolonged storage at elevated temperature.