CLAIMS
1. Cosmetic composition comprising, in a physiologically acceptable
medium:
at least 5% by weight of water;
at least alkylcellulose, the alkyl residue of which comprises between 1 and 6 carbon atoms and preferably between 1 and 3 carbon atoms, preferably ethylcellulose; - at least one first hydrocarbon-based non-volatile oil, chosen from:
- C10-C26 alcohols, preferably monoalcohols;
- optionally hydroxylated monoesters, diesters or triesters of an optionally hydroxylated C2-C8 monocarboxylic or polycarboxylic acid and of a C2-C8 alcohol;
- esters of a C2-C8 polyol and of one or more C2-C8 carboxylic acids.
at least one second non-volatile oil chosen from silicone oils and/or fluoro oils or hydrocarbon-based oils other than the said first oil;
at least one stabilizer chosen from surfactants and/or hydrophilic gelling agents, preferably chosen from associative polymers, natural polymers or their mixture.
2. Composition according to the preceding claim, characterized in that the surfactant is chosen from nonionic and anionic surfactants.
3. Composition according to anyone of preceding claims, comprising at least sodium lauryl sulfate and optionally an additional non ionic or anionic surfactant.
4. Composition according either of the preceding claim, characterized in that it is in the form of an oil-in-water emulsion.
5. Composition according to either of the preceding claims, characterized in that the surfactant(s), if present, are in a content ranging from 0.1% to 20% by weight relative to the total weight of the composition, and/or in that the hydrophilic gelling agent (preferably an associative polymer), if present, is in a content ranging from 0.1% to 10% by weight relative to the total weight of the composition.
6. Composition according to Claim 1, characterized in that the alkylcellulose is present in a content of between 1% and 60% by weight, preferably between 4% and 60% by weight, more preferably between 4% and 30% by weight and more preferentially between 5% and 20% by weight, relative to the total weight of the composition.

7. Composition according to any one of the preceding claims, characterized in that the alkylcellulose is chosen from methylcellulose, ethylcellulose and propylcellulose, and is preferably ethylcellulose.
8. Composition according to any one of the preceding claims, characterized in that the said second non-volatile oil is chosen from phenyl silicone oils.
9. Composition according to any one of the preceding claims, characterized in that it comprises a content ranging from 5% to 75% by weight of second non-volatile silicone oil(s) and/or fluoro oil(s) or hydrocarbon-based oil(s) other than the said first oil, in particular from 10% to 40% by weight and more particularly from 15% to 30% by weight, relative to its total weight.
10. Composition according to any one of the preceding claims, characterized in that the said non-volatile hydrocarbon-based "first oil" is chosen from: C10-C26 monoalcohols such as lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, palmityl alcohol, oleyl alcohol, cetearyl alcohol (mixture of cetyl alcohol and stearyl alcohol), behenyl alcohol, erucyl alcohol, arachidyl alcohol, 2-hexyldecyl alcohol, isocetyl alcohol and octyldodecanol, and mixtures thereof;

- optionally hydroxylated monoesters of a C2-C8 carboxylic acid and of a C2-C8 alcohol;
- optionally hydroxylated diesters of a C2-C8 dicarboxylic acid and of a C2-C8 alcohol, such as diisopropyl adipate, 2-diethylhexyl adipate, dibutyl adipate or diisostearyl adipate;
- optionally hydroxylated triesters of a C2-C8 tricarboxylic acid and of a C2-C8 alcohol, such as citric acid esters, such as trioctyl citrate, triethyl citrate, acetyl tributyl citrate, tributyl citrate or acetyl tributyl citrate;
- esters of a C2-C8 polyol and of one or more C2-C8 carboxylic acids, such as glycol diesters of monoacids, such as neopentyl glycol diheptanoate, or glycol triesters of monoacids, such as triacetin.
11. Composition according to any one of the preceding claims, characterized
in that the said first non-volatile hydrocarbon-based oil is present in a content ranging from
5%> to 75%) by weight, in particular from 10%> to 50% by weight and preferably from 20%
to 45%) by weight relative to the total weight of the composition.

12. Composition according to any one of the preceding claims, in which the first non-volatile hydrocarbon-based oil and the alkylcellulose are used in the composition according to the invention in a first non-volatile hydrocarbon-based oil(s)/ethylcellulose weight ratio of between 1 and 20, preferably between 2 and 15 and particularly preferably between 3 and 10.
13. Composition according to any one of the preceding claims, characterized in that it comprises between 5% and 80% by weight of water, preferably at least 10% by weight of water and preferably between 15% and 50% by weight of water, relative to the total weight of the composition.
14. Composition according to any one of the preceding claims, characterized in that it comprises:

- between 4% and 30% by weight of alkylcellulose, preferably ethylcellulose,
- between 15% and 50% by weight of water,
- between 45% and 75% by weight of non-volatile oils.

15. Composition according to any one of the preceding claims, characterized in that it comprises at least one dyestuff, preferably at least one water-soluble dye.
16. Composition according to any one of the preceding claims, characterized in that it comprises at least one compound chosen from fillers, waxes, pasty fatty substances, semi-crystalline polymers and/or lipophilic gelling agents, silicone gums, organopolysiloxane elastomers and silicone resins, and mixtures thereof.
17. Composition according to one of the preceding claims, characterized in that it is in liquid form.
18. Composition according to any one of the preceding claims, the said composition being a composition for making up and/or caring for the lips or the skin, in particular the lips, and more particularly a lipstick.
19. Cosmetic process for making up and/or caring for the skin and/or the lips, in particular the lips, comprising at least one step that consists in applying to the skin and/or the lips at least one composition as defined according to any one of Claims 1 to 18.
19. A cosmetic process for making up and/or caring for the lips, comprising at least one step that consists in applying to the lips at least one cosmetic composition comprising, in a physiologically acceptable medium: at least water;

at least alkylcellulose, the alkyl residue of which comprises between 1 and 6 carbon atoms and preferably between 1 and 3 carbon atoms, preferably ethyl cellulose; at least one first hydrocarbon-based non-volatile oü, chosen from: C1U-C26 alcohols, preferably monoalcohols;
- optionally hydroxylated monoesters, diesters or triesters of an
optionally hydroxylated CÏ-CR monocarboxylic or polycarboxylic acid and
of a Ci-Cf, alcohol;
- esters of a C:-Cs polyol and of one or more Cj-Cs carboxylic acids.
- at least one second non-volatile oil chosen from silicone oils and/or fluoro oils or
hydrocarbon-based oils other than the said first oil;
- at least one stabilizer chosen from surfactants and/or hydrophilic gelling agents,
preferably chosen from associative polymers, natural polymers or their mixture.
20. A process tbr preparing a composition as defined according to any one
of claims 1 to 18, characterized in that the alkylcellulose is used therein
in the form of a stable aqueous dispersion,