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1. (WO2019002374) SOLID CLEANING COSMETIC COMPOSITION
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CLAIMS

1 . Solid anhydrous composition, preferably cosmetic, containing:

- at least 70% by weight of microcrystalline cellulose as a proportion of the total weight of the composition;

- at least one surfactant chosen from among isethionic derivatives and their cosmetically acceptable salts;

- at least one surfactant chosen from among acyl glutamic acids and their cosmetically acceptable salts.

2. Composition according to claim 1 , in which the surfactant is chosen from among derivatives of isethionic acid and their cosmetically acceptable salts and is chosen from among acyl isethionic acid salts for which the hydrocarbon chain R of the acyl group RC=0 is linear or branched, saturated or unsaturated, and comprises from 8 to 30 carbon atoms, and preferably from 1 1 to 20 carbon atoms.

3. Composition according to claim 1 or 2, in which the surfactant chosen from among derivatives of isethionic acid and their cosmetically acceptable salts is a compound with formula (I):

R-C(=0)-C(R2)(R3)-C(R4)(R5)-S03X (I)

in which:

R represents a linear or branched, saturated or unsaturated hydrocarbon chain, and comprises from 8 to 30 carbon atoms, preferably from 1 1 to 20 carbon atoms;

X is chosen from among H+, ions of alkali metals such as Na, Li, K, preferably Na or K; ions of alkali earth metals such as Mg; ammonium groups; and mixtures thereof; and

R1 , R2, R3 and R4 independently represent a hydrogen atom, or a linear or branched alkyl group, preferably linear, comprising from 1 to 4 carbon atoms.

4. Composition according to one of the previous claims, in which the content of surfactant chosen from among derivatives of isethionic acid and their cosmetically acceptable salts is between 2% and 20% by weight of the total weight of the composition, preferably between 2.5% and 15% by weight, preferably between 3% and 10% by weight

5. Composition according to one of the previous claims, in which the surfactant chosen from among acyl glutamic acids and their cosmetically acceptable salts is chosen from

among acyl glutamic acids with a C12-C22 acyl chain, alkali metal salts such as Na, Li, K, alkali earth metal salts such as Mg, ammonium salts of said acids and mixtures thereof.

6. Composition according to one of the previous claims, in which the content of surfactant chosen from among acyl glutamic acids and their cosmetically acceptable salts is between

0.1 % and 30% by weight of the total weight of the composition, preferably between 1 % and 25% by weight, preferably between 5% and 15% by weight

7. Composition according to one of the previous claims, in which the content of microcrystalline cellulose is between 70% and 95% by weight, particularly from 72% to

90% by weight, and more preferably from 75% to 85% by weight, with respect to the weight of the composition.

8. Composition according to one of the previous claims, that also comprises at least one lubricant.

9. Composition according to claim 8, in which the lubricant is chosen from among silica, particularly anhydrous colloidal silica, kaolin, starch, mica, talc, sericite, polyamide, poly-p-alanine and polyethylene powders, tetrafluoroethylene polymer powders, acrylate and dimethicone copolymers, sodium carbonate, precipitated calcium carbonate, magnesium carbonate and hydrocarbonate, stearic acid, polyethylene glycol, metal soaps derived from carboxylic organic acids with 8 to 22 carbon atoms, preferably 12 to 18 carbon atoms, and mixtures thereof.

10. Composition according to either claim 8 or 9, in which the lubricant is present with a content of ranging from 0.1 % to 15% by weight, particularly from 1 % to 10% by weight and better from 2% to 5% by weight with respect to the total weight of the composition.

1 1 . Composition according to one of the previous claims, that comprises.

- at least 70% by weight of microcrystalline cellulose as a proportion of the total weight of the composition;

- at least one surfactant chosen from among isethionic derivatives and their cosmetically acceptable salts;

- at least one surfactant chosen from among acyl glutamic acids and their cosmetically acceptable salts; and

- possibly, at least one lubricant.

12. Composition according to one of the previous claims, comprising the following, by weight as a ratio of the total weight of the composition:

- from 70% to 95% of microcrystalline cellulose;

- from 2 to 10% of at least one surfactant chosen from among isethionic derivatives and their cosmetically acceptable salts;

- from 5% to 20% of at least one surfactant chosen from among acyl glutamic acids and their cosmetically acceptable salts; and

- possibly from 1 % to 10% of at least one lubricant.

13. Composition according to one of the previous claims, that also comprises at least one liquid binding agent chosen from among the polyols such as glycerol, 1 ,3-propanediol, propylene glycol, butylene glycol, hexylene glycol, polyethylene glycols such as PEG-8 or dipropylene glycol, or preferably a solid binder, chosen from among:

- sugars such as mannitol, maltodextrin, sorbitol, xylitol, sucrose, glucose,

- cellulose derivatives,

polyvinylpyrrolidone (PVP),

- starches,

- gums such as gum arabic, xanthan gum or carrageenans,

and mixtures thereof.

14. Composition according to one of the previous claims, that is in the form of a tablet.

15. Method of preparing a composition according to one of the previous claims, comprising a mixture of microcrystalline cellulose with a surfactant chosen from among isethionic acid derivatives and their cosmetically acceptable salts, at least one surfactant chosen from among acyl glutamic acid derivatives and their cosmetically acceptable salts, and possibly at least one lubricant; then compression of the mix obtained.

16. Method of cleaning keratin materials, preferably the skin and/or the hair, in which the composition according to one of claims 1 to 14 is brought into contact with keratin materials, then rinsing, particularly with water.