EMULSION OF A LIQUID FLUORINATED OIL PHASE IN A LIQUID WATER PHASE
Emulsions of a liquid oil phase in a liquid water phase which comprise a) more than 50 weight percent of a hydrofluoroether, a perfluoroether or a combination thereof, based on the total weight of the emulsion, b) a surfactant, and c) water, are useful in a cosmetic formulation or a cosmetic concentrate. The hydrofluoroether is represented by formula (I) CnHmF0-O-CxHyFz wherein n is a number of 1 to 12, m is a number of 0 to 25, o is a number of 0 to 25, m+o=2n+1, x is a number of 1 to 12, y is a number of 0 to 25, z is a number of 0 to 25, and y+z=2x+1, provided that m and y are not simultaneously zero, and o and z are not simultaneously zero.
1 . A cosmetic formulation or concentrate comprising:
an emulsion of a liquid oil phase in a liquid water phase comprising
a) more than 50 weight percent, based on the total weight of the emulsion, of a hydrofluoroether, a perfluoroether or a combination thereof, the hydrofluoroether being represented by formula (I)
C n H m F o —O—C x H y F z (I)
wherein n is a number of 1 to 12, m is a number of 0 to 25, o is a number of 0 to 25, m+o=2n+1, x is a number of 1 to 12, y is a number of 0 to 25, z is a number of 0 to 25, and y+z=2x+1, provided that m and y are not simultaneously zero, and o and z are not simultaneously zero,
b) a surfactant, and
c) water.
2 . The cosmetic of claim 1 , wherein the emulsion comprises at least 60 weight percent of a hydrofluoroether of formula (I), a perfluoroether or a combination thereof.
3 . The cosmetic of claim 1 , further comprising
at least 50 weight percent, based on the total weight of the emulsion, of a hydrofluoroether of the formula (I)
d) a perfluoroether.
4 . The cosmetic of claim 3 comprising at least 60 weight percent of a hydrofluoroether of formula (I).
5 . The cosmetic of claim 1 wherein the perfluoroether is a perfluoropolyether essentially consisting of carbon atoms, fluorine atoms and oxygen atoms and comprising perfluoroalkylene oxide units or perfluoroxetane rings.
6 . The cosmetic of claim 1 wherein the emulsion has a volume mean particle size of up to 50 microns.
7 . The cosmetic claim 1 additionally comprising up to 20 weight percent of a polyhydroxylated compound having three or more hydroxyl groups, based on the total weight of the emulsion.
8 .- 10 . (canceled)
11 . The cosmetic of claim 1 , wherein the emulsion is substantially non-foamed.
12 . The cosmetic of claim 1 , wherein the emulsion has a hydrofluoroether of formula (I) with boiling point of less than 100° C. at ambient pressure and temperature combined with at least one of a hydrofluoroether of formula (I) with a boiling point of at least 110° C. or a perfluoroether.
13 . The cosmetic of claim 12 , wherein the amount of the hydrofluoroether of formula (I) of higher boiling point or the perfluoroether preferably is from 1 to 20 percent based on the total weight of all hydrofluoroethers of formula (I) and the perfluoroether when present.
14 . The cosmetic of claim 1 , wherein the hydrofluoroether is C 4 F 9 —O—C 2 H 5 .
15 . The cosmetic of claim 1 , wherein the perfluoroether is a perfluoropolyether.
16 . The cosmetic of claim 15 , wherein the perfluoropolyether is trifluoromethyl-poly[oxy-2-trifluoromethyl-1,1,2-trifluoroethylene]-poly[oxy-difluoromethylene]-trifluoromethyl ether.
17 . The cosmetic of claim 1 , further comprising at least one fragrance, antioxidant, chelating agent, UV filter, preservative, thickening agent, cosmetic active ingredient, moisturizer, humectant, emollient, opacifier, pearly gloss impacting substance, pigment, colorant, dye, or antifoaming agent.
18 . The cosmetic of claim 1 , wherein the emulsion is produced in a continuous process, where the weight ratio between oil phase:water phase:surfactant is 10-30:2:1.
19 . The cosmetic of claim 1 , wherein the emulsion is produced in a batch process, where the weight ratio between oil phase:water phase:surfactant is 4-30:3-6:1.