Fluorocarbon continuous phase water-in-oil emulsions employing silicone surfactants
AssigneeL'oreal
InventorsMyriam Mellul, Pascal Arnaud
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Abstract
The present invention relates to a W/O type emulsions comprising an aqueous phase emulsified by means of a silicone surfactant, in a continuous phase containing at least one fluorohydrocarbon. It also relates to the use of certain silicone surfactants for the preparation of such emulsions. Said emulsions have utility in cosmetics and dermatology.
Claims11
Cosmetic or dermatological emulsion of the water-in-oil type, comprising an aqueous phase emulsified by means of a silicone surfactant in a continuous fatty phase containing at least one fluorohydrocarbon, wherein said fluorohydrocarbon is liquid, solid or pasty, has a substitution ratio of between 0.5 and 95%, has at least one hydrocarbon group and has the formula (I):
- (R.sub.F).sub.x --(A).sub.y --(R.sub.H).sub.2 (I)
- in which:
- x represents 1, 2 or 3,
- y represents 0 or 1,
- z represents 0, 1, 2 or 3,
- on the condition that y and z are not simultaneously 0, and that when z is 0, x is 2 or 3,
- R.sub.F represents a fluorinated radical selected from the group consisting of saturated and unsaturated, linear, branched and cyclic, aliphatic and aromatic fluorinated radicals which may be functionalized by insertion, terminal or pendant substitution of the backbone by at least one organic functional group selected from the group consisting of an alcohol, thiol, acid, carbonyl, sulfoxide, ester, amide, amine, phosphate, ethylene, acetylene, enamide and sulfonamide, interrupted by one or more oxygen or sulfur atoms or carrying hydrogen substituents or halogen substituents other than fluorine, provided that for any two carbon atoms of the skeleton, no more than one of said substituents other than fluorine is present on said two carbon atoms,
- R.sub.H is an aliphatic hydrocarbon radical selected from the group consisting of saturated and unsaturated, linear and branched radicals, which may be functionalized by insertion, terminal or pendant substitution of the backbone by at least one organic functional group selected from the group consisting of an alcohol, thiol, acid, carbonyl, sulfoxide, ester, amide, amine, phosphate, ethylene, acetylene, enamide and sulfonamide, or interrupted by one or more oxygen or sulfur atoms,
- A represents a di-, tri- or quadrivalent radical of the formula:
- ##STR20## or cyclic, aliphatic or aromatic structures or ethylenic unsaturations;
- the aqueous phase representing 10 to 90% by weight of the emulsion and said emulsion being in the form of a milk, a cream for skin or hair care, anti-sun cream, coloured cream, foundation, lipstick, mascara or blusher.
A water-in-oil type cosmetic or dermatological emulsion comprising an aqueous phase emulsified by a silicone surfactant, in a continuous fatty phase containing at least one fluorohydrocarbon, wherein said fluorohydrocarbon has at least one hydrocarbon group, a substitution ratio of between 0.5 and 95% and is liquid, solid or pasty, and said silicone surfactant has the formula (II):
- ##STR34## in which:
- X represents CH.sub.3, (CH.sub.2).sub.p --(C.sub.2 H.sub.4 O).sub.m --(C.sub.3 H.sub.6 O).sub.n --R.sub.2,
- Y represents (CH.sub.2).sub.p --O--(C.sub.2 H.sub.4 O).sub.m --(C.sub.3 H.sub.6 O).sub.n --R.sub.2,
- R.sub.1 represents a C.sub.2 -C.sub.18 alkyl radical,
- R.sub.2 represents H, a C.sub.1 -C.sub.5 alkyl radical, an aryl radical or an acetyl radical,
- p=1 to 5,
- m=0 to 50,
- n=0 to 30, m and n not simultaneously being 0,
- a=0 to 100,
- b=1 to 50, and
- c=0 to 300
- or the formula (VIII):
- ##STR35## wherein R and R.sub.1 are C.sub.1 to C.sub.8 alkyl groups, a and b have a value between 0 and 200, a and b not simultaneously being zero, and x has a value between 1 and 100;
- the aqueous phase representing 10 to 90% by weight of the emulsion, said emulsion being in the form of a milk, a cream for skin or hair care, anti-sun cream, coloured cream, foundation, lipstick, mascara or blusher.
Dependencies are inferred from the claim text.