Cleansing scrub composition

Abstract

The present invention relates to an aqueous composition comprising (i) at least hydrogel beads comprising 2 gelling agents chosen from (hetero)polysaccharides, (ii) at least one foaming surfactant, and (iii) at least anacrylic copolymer of acrylic acid and C10-C30 alkyl acrylate. The present invention further relates to the use of said composition as a cleansing scrub composition of the skin.

Claims

1. Cleansing scrub composition comprising in an aqueous medium (i) at least hydrogel beads comprising at least 2 gelling agents chosen from (hetero)polysaccharides, wherein the (hetero)polysaccharides are selected from the group consisting of agarose, alginic acid or alginate salts, (co)polymers of glucosamine, carrageenan, and mixtures thereof and wherein the average particle size of the hydrogel beads ranges from 0.2 to 1.5 mm; (ii) at least one foaming surfactant, and (iii) at least an acrylic copolymer chosen from the copolymers resulting from the polymerization of: a. at least one monomer of formula (1): ##STR00003## in which R.sub.1 denotes H or CH.sub.3 or C.sub.2H.sub.5, that is to say acrylic acid, methacrylic acid or ethacrylic acid monomers, and b. at least one monomer of unsaturated carboxylic acid (C.sub.10-C.sub.30)alkyl ester which corresponds to the monomer of following formula (2): ##STR00004## in which R.sub.2 denotes H or CH.sub.3 or C.sub.2H.sub.5 and R.sub.3 denotes a C.sub.10-C.sub.30 alkyl radical, wherein the composition comprises water in an amount of from 50 to 95% by weight relative to the total weight of the composition.

2. Composition according to claim 1, wherein the hydrogel beads comprise agar-agar and carrageenan.

3. Composition according to claim 2, wherein agar-agar and carrageenan are present in a weight ratio of agar-agar/carrageenan ranging from 1 to 1.5.

4. Composition according to claim 1, wherein the average particle size of the hydrogel beads may range from 0.7 to 1.1 mm.

5. Composition according to claim 1, wherein the hydrogel beads are present in an amount ranging from 2 to 50% by weight of active material relative to the total weight of the composition.

6. Composition according to claim 1, wherein the foaming surfactant is an anionic surfactant preferably chosen from (C6-C40)alkyl sulfates, (C6-C40)alkyl ether sulfates, (C6-C40)alkylamido ether sulfates, (C6-C40)alkylaryl polyether sulfates, monoglyceride sulfates, (C6-C40)alkyl sulfonates or alpha olefin sulfonates, (C6-C40)alkylamide sulfonates, (C6-C40)alkylarylsulfonates, paraffin sulfonates, (C6-C40)alkyl sulfosuccinates, (C6-C40)alkyl ether sulfosuccinates, (C6-C40)alkylamide sulfosuccinates, (C6-C40)alkyl sulfoacetates, (C6-C40)acylsarcosinates, (C6-C40)acylglutamates, (C6-C40)alkyl sulphosuccinamates, (C6-C40)acylisethionates and N—(C6-C40)acyl taurates, salts of (C6-C40)alkyl monoesters and polyglycosidepolycarboxylic acids, (C6-C40)acyl lactylates, N—(C6-C40)acyl glycinates, salts of D-galactoside-uronic acids, salts of (C6-C40)alkyl ether carboxylic acids, (C6-C40)alkyl aryl ether carboxylic acid salts, salts of (C6-C40)alkyl amidoether carboxylic acids, sulfoacetates, sulfolaurates, and the corresponding non-salt forms all of these compounds; an amphoteric surfactant preferably chosen from (C8-C20)alkylbetaines, sulfobetaines, (C8-C20)alkylsulfobetaines, (C8-C20)alkylamido(C1-C6)alkylbetaines, (C8-C20)alkylamido(C1-C6)alkylsulfobetaines, alkali salts of (C8-C16)alkylamphodiacetate, alkali salts of (C8-C16)alkylamphodipropionate, (C8-C16)alkylamphodipropionic acids, and mixtures thereof; a non ionic surfactant preferably chosen from alkylpolyglycoside surfactants; or a mixture thereof.

7. Composition according to claim 1, wherein the foaming surfactant is chosen from an anionic surfactant chosen from (C6-C24)alkyl sulfates, (C6-C24)alkyl ether sulfates, isethionates, amino acids, their alkali salts, and mixtures thereof; an amphoteric surfactant chosen from (C8-C20)alkylbetaines, (C8-C20)alkylamido(C1-C6)alkylbetaines, (C8-C20)alkylamphoacetates and (C8-C20)alkylamphodiacetates, and mixtures thereof; a non ionic surfactant chosen from C8-C16 alkylpolyglucosides; and mixtures thereof.

8. Composition according to claim 1, wherein the foaming surfactant is present in an amount ranging from 1 to 10% by weight of active material relative to the total weight of the composition.

9. Composition according to claim 1, wherein the acrylic copolymer is chosen from the copolymers resulting from the polymerization of at least one monomer of formula (1) with at least one monomer of formula (2) in which R.sub.2 denotes H or CH.sub.3 and R.sub.3 denotes a C.sub.12-C.sub.22 alkyl radical.

10. Composition according to claim 9, wherein the acrylic copolymer is chosen among copolymer resulting from the polymerization of a mixture of monomers comprising: a. acrylic acid b. an ester of formula (2) described above in which R.sub.2 denotes H or CH.sub.3 and R.sub.3 denotes an alkyl radical having from 12 to 22 carbon atoms, and c. a crosslinking agent which is chosen among diallyl phthalate, allyl (meth)acrylate, divinylbenzene, (poly)ethylene glycol dimethacrylate, methylenebisacrylamide, allyl ether of sucrose or an allyl ether of pentaerythritol.

11. Composition according to claim 1, wherein the acrylic copolymer is present in an amount ranging from 0.1 to 5% by weight of active material relative to the total weight of the composition.

12. Composition according to claim 1, further comprising silica.

13. Composition according to claim 12, wherein the average particle size of silica is ranging from 100 μm to 500 μm.

14. Composition according to claim 1, wherein the composition is in the form of a gel.

15. Composition according to claim 1, wherein the composition has a viscosity at 25° C. ranging from 2.2 to 7 Pa.Math.s.

16. Process for cleansing the skin, comprising applying to the skin a composition comprising in an aqueous medium (i) at least hydrogel beads comprising at least 2 gelling agents chosen from (hetero)polysaccharides, wherein the (hetero)polysaccharides are selected from agarose, alginic acid or alginate salts, (co)polymers of glucosamine, carrageenan, and mixtures thereof and wherein the average particle size of the hydrogel beads ranges from 0.2 to 1.5 mm, (ii) at least one foaming surfactant, and (iii) at least an acrylic copolymer chosen from the copolymers resulting from the polymerization of: a. at least one monomer of formula (1): ##STR00005## in which R.sub.1 denotes H or CH.sub.3 or C.sub.2H.sub.5, that is to say acrylic acid, methacrylic acid or ethacrylic acid monomers, and b. at least one monomer of unsaturated carboxylic acid (C.sub.10-C.sub.30)alkyl ester which corresponds to the monomer of following formula (2): ##STR00006## in which R.sub.2 denotes H or CH.sub.3 or C.sub.2H.sub.5 and R.sub.3 denotes a C.sub.10-C.sub.30 alkyl radical wherein the composition comprises water in an amount of from 50 to 95% by weight relative to the total weight of the composition.

Description

EXAMPLES

(1) In the following examples, the hydrogel beads according to the invention (named “beads sample” in the following examples) that are used are suspended in an aqueous solution (approx. 70% in aqueous solution) and contain the following ingredients (% given by weight relative to the total weight of the solution of suspended beads):

(2) TABLE-US-00001 Water 95.027 agar-agar 2.01 carageenan 1.591 phenoxyethanol 0.659 caprylyl glycol 0.529 potassium chloride 0.1 glucose 0.084

(3) These hydrogel beads were prepared according to the process described in U.S. Pat. No. 6,467,699 and have an average size of approximately 0.9 mm.

(4) In the following examples, the compositions are prepared according to the following general procedure: 1. The polymer is dispersed in water and the temperature is raised up to 65° C., except for example 3: hydroxypropyl methyl cellulose is added at 80° C. and then allowed to cool down. 2. Additives are added (preservatives, glycerin). 3. Surfactants are added at 60-65° C. 4. Neutralizing agent, if present, is added at 55-65° C. 5. An aqueous suspension of beads is added under stirring to the composition at ambient temperature.

(5) In the following examples, the weight percentages are given relative to the total weight of the composition. “% am” means percentage of active material.

Examples 1-4: Influence of the Nature of the Polymer

(6) 2 compositions according to the invention (examples 1 and 2) comprising a polymer from the class of crosslinked acrylic acid copolymer (Carbopol ETD 2020 and Carbopol Ultrez 20) were prepared and compared to 2 comparative compositions outside the invention (examples 3 and 4) comprising cellulosic polymers (hydroxypropyl methylcellulose and hydroxyethyl cellulose), as set forth in the table below:

(7) TABLE-US-00002 Compounds Ex 1 Ex 2 Ex 3 Ex 4 Water QSP 100 QSP 100 QSP 100 QSP 100 Acrylates/C10-30 alkyl acrylate 1.20 — — — crosspolymer (Carbopol ETD 2020 from Lubrizol) Acrylates/C10-30 alkyl acrylate — 1.33 — — crosspolymer (90% am) (Carbopol (1.20% am)  Ultrez 20 from Lubrizol) Hydroxypropyl methyl cellulose — — 1.2 — (Benecel K100M from Ashland) Hydroxyethyl cellulose (Natrosol — — — 1.2 250 HHR CS from Ashland) Sodium laureth sulfate (70% in water) 5 5 5 5 (Galaxy LES 170 from Galaxy (3.5% am) (3.5% am) (3.5% am) (3.5% am) Surfactants) Glycerin 5 5 5 5 Triethanolamine 1.1 1.1 — — Beads sample (70% in water) 12 12 12 12 (8.4% am) (8.4% am) (8.4% am) (8.4% am) Phenoxyethanol 0.7 0.7 0.7 0.7 TOTAL 100 100 100 100

(8) The texture and the visual appearance of each composition were studied after storage at 25° C. after 2 months (visual observation). The composition is considered as stable if no change in visual appearance is observed after 2 months of storage at 25° C. and if the beads remain suspended. The results are summarized in the table below:

(9) TABLE-US-00003 Formula Observation Ex 1 gel texture (2.6 Pa .Math. s), translucent, beads remain suspended after 2 months at 25° C. Ex 2 gel texture (3.8 Pa .Math. s), translucent, beads remain suspended after 2 months at 25° C. Ex 3 liquid texture (2.12 Pa .Math. s), translucent, beads settle in 48 h at 25° C. Ex 4 liquid texture (1.95 Pa .Math. s), translucent, beads settle in 48 h at 25° C.

(10) Compositions according to the invention and comprising a crosslinked acrylate copolymer (examples 1 and 2) displayed a gel texture and the beads remain suspended after 2 months at 25° C., while compositions outside the invention comprising hydroxypropyl methyl cellulose or hydroxyethyl cellulose (examples 3 and 4) afforded a liquid texture and beads settle in 48 h.

(11) These comparative examples show the importance of the acrylic copolymer for obtaining a gel texture and a stable suspension of the beads in the compositions.

(12) The compositions were also applied on skin: the face was wetted then 1 g of the composition is applied on the face by massage, and finally the face is rinse-off. The cosmetic properties on usage were evaluated by 5 persons: the compositions of examples 1 and 2 according to the invention were gentle, mild and soft upon application and have no irritating effect.

Examples 5-7: Influence of the Nature of the Surfactant

(13) 3 compositions according to the invention (examples 5 to 7) and comprising various surfactants (sodium laureth sulfate, cocamidopropyl betaine, decyl glucoside) as detailed in the table below were prepared.

(14) TABLE-US-00004 Compounds Ex 5 Ex 6 Ex 7 Water QSP 100 QSP 100 QSP 100 Acrylates/C10-30 alkyl acrylate crosspolymer 1.3 1.3 1.3 (90% am) (Carbopol Ultrez 20 from Lubrizol) (1.17% am)  (1.17% am) (1.17% am) Sodium laureth sulfate (70% in water) (Galaxy 5 4.5 4.5 LES 170 from Galaxy Surfactants) (3.5% am) (3.15% am) (3.15% am) Cocamidopropyl betaine (38% am in water) — 1 — (Dehyton PK 45 from Cognis) (0.38% am) Decyl glucoside (40% am in water) (Mydol 10 — — 1 from Kao)  (0.4% am) Glycerin 5 5 5 Triethanolamine 1.1 1.1 1.1 beads sample (70% am in water) 12 12 12 (8.4% am)  (8.4% am)  (8.4% am) Phenoxyethanol 0.7 0.7 0.7 TOTAL 100 100 100

(15) The texture, the appearance and the stability of each composition were evaluated. The texture and appearance of the compositions were evaluated by visual observation at 25° C. The stability was evaluated after one month of storage at various temperatures (4° C., 37° C. and 45° C.). The composition is considered as stable if no change in visual appearance is observed after one month of storage at these temperatures and if the beads remain suspended. The results are summarized in the table below:

(16) TABLE-US-00005 Formula Observation Ex 5 gel texture (3.6 Pa .Math. s), translucent, stable Ex 6 gel texture (4 Pa .Math. s), translucent, stable Ex 7 gel texture (3.2 Pas), translucent, stable

(17) All compositions had a gel texture with a clear and translucent appearance and were stable, regardless the foaming surfactant used. This shows that the texture, appearance and stability of the composition are independent from the nature of the foaming surfactant used.

(18) The compositions were also applied on skin: the face was wetted then 1 g of the composition is applied on the face by massage, and finally the face is rinse-off. The cosmetic properties on usage were evaluated by 5 persons: All compositions were gentle, mild and soft upon application and have no irritating effect.

Examples 8-10: Influence of the Amount of Beads and Presence of Silica

(19) 3 compositions according to the invention (examples 8 to 9) comprising various amounts of beads were prepared. Compositions according to examples 8 and 9 further comprise various amount of amorphous silica.

(20) TABLE-US-00006 Compounds Ex 8 Ex 9 Ex 10 Water QSP 100 QSP 100 QSP 100 Acrylates/C10-30 alkyl acrylate crosspolymer 1.3 1.3 1.1 (90% am) (Carbopol Ultrez 20 from Lubrizol) (1.17% am) (1.17% am) (0.99% am) Sodium laureth sulfate (70% in water) (Galaxy 5 5 5 LES 170 from Galaxy Surfactants)  (3.5% am)  (3.5% am)  (3.5% am) Decyl glucoside (53% in water) (Mydol 10 from 4 4 4 Kao) (2.12% am) (2.12% am) (2.12% am) Glycerin 5 5 5 Triethanolamine 1.1 1.1 1 beads sample (70% am in water) 6 15 50  (4.2% ma) (10.5% ma)   (35% ma) Amorphous Silica (Sorbosil BFG 50 from PQ 0.2 1 — Corporation) (0.16% am)  (0.8% am) Phenoxyethanol 0.7 0.7 0.7 TOTAL 100 100 100

(21) The appearance of the compositions was evaluated by visual observation.

(22) The stability of the compositions was evaluated after one month of storage at 4° C., 37° C. and 45° C. The composition is considered as stable if no change in visual appearance is observed after one month of storage at these temperatures and if the beads remain suspended.

(23) The compositions were also applied on skin: the face was wetted, then 1 g of the composition is applied on the face by massage, and finally the face is rinse-off. The cosmetic properties on usage were evaluated by 5 persons. The results are summarized in the table below:

(24) TABLE-US-00007 Formula Observation Ex 8 gel texture (3.2 Pa .Math. s), clear and translucent, stable, pleasant on application, non-tacky, clean and fresh feel after use, scrubbing effect enhanced Ex 9 gel texture (3.1 Pa .Math. s), clear and translucent, stable, pleasant on application, non-tacky, clean and fresh feel after use, scrubbing effect enhanced Ex 10 gel texture (3.7 Pa .Math. s), clear and translucent, stable, pleasant on application, non-tacky, clean and fresh feel after use

(25) In all cases, the compositions were clear and translucent, stable, pleasant on application (gentle, mild and soft upon application and have no irritating effect), non-tacky and leaves a clean and fresh feeling after use. When the composition further comprises amorphous silica (0.16% or 0.8% by weight of active material—examples 8 and 9), the scrubbing effect is enhanced compared to the same composition without amorphous silica (example 10).

Example 11: Influence of the Nature of the Hydrogel Beads

(26) The following composition comprising Captivates GL7657® beads from Ashland was prepared.

(27) TABLE-US-00008 Compounds Ex 11 Water QSP 100 Acrylates/C10-30 alkyl acrylate crosspolymer (90% am) 1.30 (Carbopol Ultrez 20 from Lubrizol) Sodium laureth sulfate (70% in water) (Galaxy LES 5 170 from Galaxy Surfactants) (3.5% am) Decyl glucoside (53% in water) (Plantacare 200 4 UP from Cognis) (2.12% am)  Glycerin 5 Triethanolamine 1.1 Captivates GL7657 ® beads from Ashland 6 (4.2% am) Amorphous silica Silica (Sorbosil BFG 50 from 0.2 PQ Corporation) (0.16% am)  Phenoxyethanol 0.7 TOTAL 100

(28) The appearance of the composition was evaluated by visual observation.

(29) The stability of the compositions was evaluated after one month of storage at 4° C., 37° C. and 45° C. The composition is considered as stable if no change in visual appearance is observed after one month of storage at these temperatures and if the beads remain suspended.

(30) The compositions were also applied on skin: the face was wetted, then 1 g of the composition is applied on the face by massage, and finally the face is rinse-off. The cosmetic properties on usage were evaluated by 5 persons.

(31) The composition had a gel texture (viscosity of 3.2 Pa.Math.s), and was translucent and stable.

(32) The composition was non-tacky and pleasant on application, and left a clean and fresh feeling after use.