Rheofluidifying concentrated foaming composition and uses of same, in particular for body hygiene

Abstract

A rheofluidifying surfactant composition structured into planar lamellar phases includes: a) at least one anionic surfactant and b) at least one compound selected from among amphoteric surfactants and non-ionic surfactants, in which the total active material of said surfactants is between 35 and 60% by weight relative to the total weight of said composition, in which the ratio of anionic surfactant is between 0.3 and 0.9, the ratio of amphoteric surfactant is between 0.0 and 0.7 and the ratio of non-ionic surfactant is between 0.0 and 0.7, said ratio being the ratio between the weight percentage of active material of said surfactant in said composition and the weight percentage of total active material of said surfactants in said composition, the pH of the composition being between 4 and 8, said at least one anionic surfactant being selected from the group comprising alkyl sulfates, alkyl ether sulfates, sulfonates, derivatives of phosphoric acid, phosphates and alkyl phosphates, isethionates, taurates, sulfoccinates, alkyl sulfoacetates, anionic derivatives of proteins of plant origin, amino acids and amino acid derivatives, polypeptides, carboxylic acids and the salts of same, salts of fatty acids from saponification, lactic acid derivatives and alkyl polyglucoside derivatives, and said composition being free of sodium chloride other than that which may be provided by the surfactants.

Claims

1. A shear-thinning surfactant composition structured into planar lamellar phases consisting of: a) at least one anionic surfactant, b) at least one compound chosen from amphoteric surfactants and nonionic surfactants, c) optionally fragrance, d) an acid or base for adjusting the pH, and e) water, in which the total active material of said surfactants is from 35% to 60% by weight, with respect to the total weight of said composition, in which the ratio of anionic surfactant is from 0.4 to 0.8, the ratio of amphoteric surfactant is from 0.2 to 0.5 and the ratio of nonionic surfactant is from 0.0 to 0.1, said ratio being the ratio of the percentage by weight of active material of said surfactant in said composition to the percentage by weight of total active material of said surfactants in said composition, the pH of the composition being between 4 and 8, said at least one anionic surfactant is ammonium lauryl sulfate, and the shear-thinning surfactant composition is a sprayable gel, wherein the fragrance, when present, ranges from 0.05% to 10% by weight, with respect to the total weight of said composition, and in which water is from 40% to 65% by weight, with respect to the total weight of said composition.

2. The composition as claimed in claim 1, in which said at least one amphoteric surfactant is selected from the group consisting of N-alkylamidobetaines, betaines, sultaines, alkylpolyaminocarboxylates, alkylamphoacetates and cocoamphopolycarboxyglycinate.

3. The composition as claimed in claim 2, in which: said N-alkylamidobetaines are selected from the group consisting of cocamidopropyl betaine and lauramidopropyl betaine, and their mixtures; said betaines are selected from the group consisting of coco betaine and lauryl betaine, and their mixtures; said sultaines is cocamidopropyl hydroxysultaine, said alkylpolyaminocarboxylates are selected from the group consisting of sodium carboxymethyl tallow polypropylamine and sodium carboxymethyl oleyl polypropylamine, and their mixtures: said alkylamphoacetates are selected from the group consisting of disodium cocoamphoacetate, sodium cocoamphoacetate and disodium lauroamphoacetate, and their mixtures.

4. The composition as claimed in claim 1, in which said at least one nonionic surfactant is selected from the group consisting of alkyl polyglucosides, esters of glyceryl and of fatty acid, esters of sucrose and of fatty acids, oxyalkylenated esters of sucrose, oxyalkylenated esters of glycerol, esters of fatty acids and of polyethylene glycol, esters of fatty acid and of sorbitan, polyglycerolated fatty alcohols and glucamine derivatives selected from the group consisting of capryloyl or caproyl methyl glucamide, lauroyl methyl glucamide, lauroyl methyl glucamide and cocoyl methyl glucamide, and their mixtures.

5. The composition as claimed in claim 4, in which: said alkyl polyglucosides are selected chosen from the group consisting of decyl glucoside, lauryl glucoside, caprylyl/capryl glucoside and coco glucoside, and their mixtures; said esters of glyceryl and of fatty acid are selected from the group consisting of glyceryl stearate, glyceryl ricinoleate and glyceryl oleate, and their mixtures; the esters of sucrose and of fatty acids are selected from the group consisting of sucrose stearate, sucrose palmitate, sucrose laurate and sucrose distearate, and their mixtures; the oxyalkylenated esters of sucrose are selected from the group consisting of methyl glucose caprate/caprylate/oleate, PEG-120 methyl glucose dioleate and PEG-20 methyl glucose sesquistearate, and their mixtures; the oxyalkylenated esters of glycerol are selected from the group consisting of PEG-7 glyceryl cocoate, PEG-80 glyceryl cocoate, PEG-30 glyceryl cocoate and PEG-200 hydrogenated glyceryl palmate, and their mixtures; said esters of fatty acids and of polyethylene glycol are selected from the group consisting of PEG-8 stearate, PEG-20 stearate, PEG-40 stearate, PEG-50 stearate and PEG-100 stearate, and their mixtures; and said esters of fatty acid and of sorbitan are selected from the group consisting of sorbitan palmitate, sorbitan stearate, sorbitan tristearate, sorbitan oleate and sorbitan trioleate, and their mixtures.

6. The composition as claimed in claim 1, in which said anionic surfactant is ammonium lauryl sulfate, the amphoteric surfactant is an N-alkylaminobetaine or an alkylamphoacetate and the nonionic surfactant is an alkyl polyglucoside.

7. The composition as claimed in claim 1, in which said anionic surfactant is ammonium lauryl sulfate, the amphoteric surfactant is cocamidopropyl betaine or sodium cocoamphoacetate and the nonionic surfactant is decyl glucoside.

8. The composition as claimed in claim 1, wherein said fragrance is present.

9. A cosmetic or dermatological composition, or a household cleaning product, comprising a surfactant composition as defined according to claim 1.

10. The composition as defined in claim 9, wherein said composition is a shower gel, a cleansing gel for the skin of the face, a shampoo, or a washing gel for the hands.

11. The product as defined in claim 10, wherein the product is a washing-up liquid, a multiuse household cleaning gel, or a household cleaning product for the floor.

12. A cosmetic treatment process comprising cleansing the skin and/or superficial body growths with the cosmetic composition as defined in claim 9.

13. A combination between a spray-generating device and a surfactant composition as defined in claim 1, in which said spray-generating device diffuses, as a spray, said cosmetic composition.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) FIG. 1 represents an X-ray photograph of a concentrated shower gel composition. The X-rays are produced by a rotating 40 kV 40 mA copper anode, with a diameter of 40 cm. The exposure time is 2 hours (8 periods of time of 15 minutes each). The sample is provided in the form of a capillary with a diameter of 1.5 mm, placed in a sample holder thermostatically controlled at 20° C. The diffraction diagram is characteristic of a lamellar phase; it consists of two thin rings (diffraction order 1 and order 2). The form of observation of FIG. 1 makes it possible to characterize the structure as nonwound planar lamellar phases.

(2) FIG. 2 represents an optical microscope photograph of the shower gel composition which is the subject of FIG. 1, in differential interference contrast.

IMPLEMENTATIONAL EXAMPLES OR EMBODIMENTS

Example 1: Process for the Preparation of a Surfactant Composition

(3) Cocamidopropyl betaine (amphoteric surfactant) and decyl glucoside (nonionic surfactant) are added to water, at ambient temperature (approximately 20° C.). Citric acid is subsequently added to the mixture, at ambient temperature. Fragrance and then ammonium lauryl sulfate (anionic surfactant) are subsequently added to the mixture; everything is mixed at ambient temperature.

(4) The proportions of the different components are those given in table I below:

(5) TABLE-US-00001 INCI name Active material % Ammonium lauryl sulfate 25-35 Cocamidopropyl betaine  5-15 Decyl glucoside 1-5 Citric acid .sup. 0-0.5 Fragrance 1-5 Water q.s. for 100

Example 2: Example of a Surfactant Composition

(6) A surfactant composition of the disclosure, with the concentrations of its components, as active material, is illustrated in table I above.

(7) This formulation is approximately 4× concentrated, with respect to a conventional shower gel.

(8) This formulation has the property of fluidifying on spreading.

(9) It is a “structured” surface-active medium: the surfactants present in the composition are arranged in a lyotropic phase of liquid crystal type; the phase is optically anisotropic and appears birefringent when it is observed in polarized light with an optical microscope. More specifically, it is a lamellar phase, where the surfactants are arranged in planar bilayers, also known as lamellae. The bilayers form a periodic stack, being separated from one another by intermediate layers of water.

Example 3: Example of a Surfactant Composition

(10) A surfactant composition of the disclosure, with the concentrations of its components, as active material and commercial material, is illustrated in table II below.

(11) TABLE-US-00002 TABLE II INCI name Active material % Ammonium lauryl sulfate 25-35 Sodium cocoamphoacetate  5-15 Decyl glucoside 1-5 Citric acid .sup. 0-0.5 Fragrance 1-5 Water q.s. for 100

(12) This formulation is 4× concentrated, with respect to a conventional shower gel.

(13) It is a “structured” surface-active medium: the surfactants present in the composition are arranged in a lyotropic phase of liquid crystal type; the phase is optically anisotropic and appears birefringent when it is observed in polarized light with an optical microscope. More specifically, it is a lamellar phase, where the surfactants are arranged in planar bilayers, also known as lamellae. The bilayers form a periodic stack, being separated from one another by intermediate layers of water.

Example 4: Examples of Surfactant Compositions

(14) 8 surfactant compositions of the disclosure, with the concentrations of their components, as active material and commercial material, are illustrated in table III below.

(15) TABLE-US-00003 TABLE III % Active % Active % Active % Active % Active % Active % Active % Active INCI name material material material material material material material material Ammonium lauryl sulfate 27.2 30.6 36.0 23.4 23.4 19.1 29.0 25.0 Sodium methyl cocoyl 0.0 0.0 0.0 3.6 0.0 7.2 0.0 0.0 taurate Sodium lauryl sarcosinate 0.0 0.0 0.0 0.0 4.5 0.0 0.0 0.0 Cocamidopropyl betaine 0.0 12.6 12.4 8.1 8.1 6.6 10.0 8.6 Cocoamphoacetate 9.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Decyl glucoside 2.7 7.6 3.7 2.3 2.3 1.9 2.8 2.4 Glyceryl oleate 0.0 0.0 0.0 0.8 0.8 0.6 0.9 0.8 Citric acid 2.0 0.0 0.0 0.2 0.2 0.2 0.3 0.2 Fragrance 2.4 4.7 4.7 2.4 2.4 2.4 3.8 3.3 Aloe vera gel 1.1 1.0 Lemon extract 0.5 0.5 Water

Example 5: Tests of Usages and of Effectivenesses of a Composition According to the Disclosure

(16) Conditions of the Tests:

(17) In order to validate the performance and perception of the composition of the disclosure, 117 women aged between 18 and 64 years were recruited for this study. The use of the concentrated shower gel in place of the usual shower gel was carried out in a blind test at home for 7 days.

(18) For this reason, the composition was applied once daily for 7 days under the normal conditions of use.

(19) The overall evaluation was carried out at the first use and after 7 days of use by a grading from 0 to 10. It reflects the satisfaction with use.

(20) The detailed evaluation was carried out after 7 days of use, with regard to the 4 descriptors: texture, fragrance, practicality of the bottle and feeling on the skin, by measurement on a scale of agreement.

(21) The key indicators are evaluated after 7 days of use. They relate to the indicators of purchase, the recommendations, the preferences and the intention to buy and recommendation after presentation of the concept.

(22) Results:

(23) With regard to the overall evaluation, the results declare in favor of a very well evaluated product after a suitability time. This is because the scores progress between the 1st application (overall mean grade of 7.7) and the 7th application (overall mean grade of 8.1), with a very good evaluation of the Eco shower gel after 7 days of use. All the items progress, particularly the quality, followed by the application, by the fragrance and by the foam.

(24) With regard to the texture, a good assessment of the texture over all the criteria (mean grade of 7.9) after 7 days of use, in particular with regard to the ease of rinsing.

(25) The foam and the consistency are very well received after 7 days of use, both in terms of amount and of smoothness and fluidity.

(26) The fragrance is positively evaluated (mean grade of 7.8) after 7 days of use, with clients who judge the fragrance very “pleasant, pleasing to smell” and “well suited to a shower gel”, with a balanced intensity for the majority.

(27) The evaluation of the feeling on the skin once having left the shower is good (mean grade of 8.0) after 7 days of use.

(28) The perception of the practicality of the bottle is very good (mean grade of 8.5) after 7 days of use. The clients are very convinced by the majority of the criteria, in particular “can be taken anywhere”, “remains clean, tidy”, “easy to use”, “the product easily comes out of the bottle”.

(29) The combined results, as percentage of clients who have responded favorably to the questions, are shown in table IV:

(30) TABLE-US-00004 TABLE IV Criterion Product advantage % of clients Texture Is well suited 50 Is pleasant to apply 50 Is easily rinsed off 56 Foam and consistency Foams sufficiently 73 Smoothness of the foam 74 Fluidity of the texture 78 Fragrance Is pleasant, which has a 53 pleasing smell Bottle Can be taken anywhere 76 Remains clean, tidy (product 75 does not fall) The product easily comes out 68 of the bottle Makes it possible to save 59 space in my bathroom Easy to use 69

(31) The comparison with a usual shower gel reflects an advantage for the product of the disclosure with regard to the majority of the criteria, in particular with regard to the texture, with respect to the skin, suitable for all the family and logically with regard to the practicality, as shown in table V:

(32) TABLE-US-00005 TABLE V Product advantage Usual shower gel Test shower gel It is pleasant to use 11 18 Is of quality 10 18 Has a pleasant texture 7 26 Spreads easily on the 18 23 skin Is easily rinsed off 9 13 Foams sufficiently 23 31 The fragrance is 28 35 pleasant Practical to carry 21 26 The bottle is practical 1 74 The product easily 2 62 comes out of the bottle Washes my skin gently 7 40 Leaves the skin soft 8 27 Respects the balance 14 25 of the skin Does not dry out the 11 22 skin Suitable for my 17 25 personal use Suitable for all the 9 22 family

(33) In conclusion, more than half the respondents would use the test shower gel every day in place of their usual shower gel.

Example 6: Tests of Use Under Dermatological Monitoring of the Vanilla-Fragrance Eco Shower Gel

(34) The aim of the study was:

(35) (1) to confirm the cutaneous tolerance of vanilla-fragrance Eco shower gels (containing the composition of the disclosure) applied under normal conditions of use,

(36) (2) to assess the cosmetic qualities and also the overall satisfaction of the vanilla Eco shower gels applied under normal conditions of use, and

(37) (3) to evaluate the mean amount used for the vanilla Eco shower gels, applied by the volunteers under normal conditions of use.

(38) Protocol of the Study

(39) The product studied was applied to the body at least once daily, for 3 consecutive weeks, by 27 healthy adult volunteers.

(40) These applications were carried out by the volunteer herself, at her home and according to the protocol of use described by the promoter.

(41) The product studied was used in place of the product of the same type which the volunteer normally or occasionally uses.

(42) Mode of application: A knob of formulation is sufficient on wet skin.

(43) =a single pressing per shower (the produce is concentrated)

(44) To be spread over the whole of your body, in place of your conventional shower gel.

(45) At T0:

(46) The bottles are weighed before starting the test. The volunteers arrive without having applied cosmetic product to the body on the day of the appointment. Clinical examination and confirmation of the criteria for inclusion and non-inclusion by the doctor.
From T0 to T3 weeks: The volunteers apply the study product at home and under the normal conditions of use of the product, in place of that usually used, and according to the instructions mentioned in the questionnaire (frequency and duration of use, region and mode of application). The volunteers evaluate the cosmetic qualities of the product, the assertions and overall satisfaction. The volunteers must not use new cosmetic products (with the exception of that of the study). The volunteers must not change their habits of use of cosmetic products other than the product having the same effects as the test product.
At T3 weeks: The volunteers arrive for consultation without having applied cosmetic product to the body on the day of the appointment. Clinical examination with a doctor, who also confirms that the protocol has been well observed. The volunteers hand over the evaluation questionnaire and the test product. The bottles recovered are weighed.
Monitoring of the Study 27 adult volunteers were recruited for the vanilla product. No subject was excluded from the studies. The characteristics of the volunteers are mentioned in table VI.

(47) TABLE-US-00006 TABLE VI CHARACTERISTICS OF THE VOLUNTEERS - VANILLA ECO SHOWER GEL 27 SUBJECTS Age mean of the study: 56 years (min. age: 31 years; max. age: 72 years) Skin type: Very dry  7% Dry 70% Normal 22%
Results and Discussion: Assessment of the Skin Tolerance

(48) For 55.5% of the volunteers, the possible clinical signs (dryness) present as DO have disappeared, showing improvement in the skin condition, or have not changed. These volunteers did not note any skin reaction or functional sign related to the use of the test vanilla Eco shower gel and judged the tolerance to be excellent.

(49) For 40.8% of the volunteers, no clinical sign was observed at D0, as at D21. These volunteers did not note any skin reaction or functional sign relating to the use of the test vanilla Eco shower gel and judged the tolerance to be excellent.

(50) In the light of these comments and of the very good tolerance with the majority of the volunteers, the overall tolerance is judged to be good.

Example 7: Tests of Use Under Dermatological Monitoring of the Olive-Fragrance Eco Shower Gel

(51) The aim of the study was:

(52) (1) to confirm the cutaneous tolerance of olive-fragrance Eco shower gels (containing the composition of the disclosure) applied under normal conditions of use,

(53) (2) to assess the cosmetic qualities and also the overall satisfaction of the olive Eco shower gels applied under normal conditions of use, and

(54) (3) to evaluate the mean amount used for the olive Eco shower gels, applied by the volunteers under normal conditions of use.

(55) Protocol of the Study

(56) The product studied was applied to the body at least once daily, for 3 consecutive weeks, by 26 healthy adult volunteers.

(57) These applications were carried out by the volunteer herself, at her home and according to the protocol of use described by the promoter.

(58) The product studied was used in place of the product of the same type which the volunteer normally or occasionally uses.

(59) Mode of application: A knob of formulation is sufficient on wet skin.

(60) =a single pressing per shower (the produce is concentrated)

(61) To be spread over the whole of your body, in place of your conventional shower gel.

(62) At T0:

(63) The bottles are weighed before starting the test. The volunteers arrive without having applied cosmetic product to the body on the day of the appointment. Clinical examination and confirmation of the criteria for inclusion and non-inclusion by the doctor.
From T0 to T3 Weeks: The volunteers apply the study product at home and under the normal conditions of use of the product, in place of that usually used, and according to the instructions mentioned in the questionnaire (frequency and duration of use, region and mode of application). The volunteers evaluate the cosmetic qualities of the product, the assertions and overall satisfaction. The volunteers must not use new cosmetic products (with the exception of that of the study). The volunteers must not change their habits of use of cosmetic products other than the product having the same effects as the test product.
At T3 Weeks:

(64) The volunteers arrive for consultation without having applied cosmetic product to the body on the day of the appointment. Clinical examination with a doctor, who also confirms that the protocol has been well observed. The volunteers hand over the evaluation questionnaire and the test product. The bottles recovered are weighed.

(65) Monitoring of the Study

(66) 26 adult volunteers were recruited for the olive product.

(67) No subject was excluded from the studies. The characteristics of the volunteers are mentioned in table VII.

(68) TABLE-US-00007 TABLE VII CHARACTERISTICS OF THE VOLUNTEERS - VANILLA ECO SHOWER GEL 26 SUBJECTS Age mean of the study: 47 years (min. age: 27 years; max. age: 60 years) Skin type: Very dry  4% Dry 81% Normal 15%
Results and Discussion: Assessment of the Skin Tolerance

(69) For 65.4% of the volunteers, the possible clinical signs (dryness) present as D0 have disappeared, showing improvement in the skin condition, or have not changed. These volunteers did not note any skin reaction or functional sign related to the use of the test olive Eco shower gel and judged the tolerance to be excellent.

(70) For 19.2% of the volunteers, no clinical sign was observed at D0, as at D21. These volunteers did not note any skin reaction or functional sign relating to the use of the test olive Eco shower gel and judged the tolerance to be excellent.

(71) In the light of these comments and of the very good tolerance with the majority of the volunteers, the overall tolerance is judged to be good.

Example 8: Tests of Use Under Dermatological Monitoring of the Mango-Fragrance Eco Shower Gel

(72) The aim of the study was:

(73) (1) to confirm the cutaneous tolerance of mango-fragrance Eco shower gels (containing the composition of the disclosure) applied under normal conditions of use,

(74) (2) to assess the cosmetic qualities and also the overall satisfaction of the mango Eco shower gels applied under normal conditions of use, and

(75) (3) to evaluate the mean amount used for the mango Eco shower gels, applied by the volunteers under normal conditions of use.

(76) Protocol of the Study

(77) The product studied was applied to the body at least once daily, for 3 consecutive weeks, by 27 healthy adult volunteers.

(78) These applications were carried out by the volunteer herself, at her home and according to the protocol of use described by the promoter.

(79) The product studied was used in place of the product of the same type which the volunteer normally or occasionally uses.

(80) Mode of application: A knob of formulation is sufficient on wet skin.

(81) =a single pressing per shower (the produce is concentrated) To be spread over the whole of your body, in place of your conventional shower gel.

(82) At T0:

(83) The bottles are weighed before starting the test. The volunteers arrive without having applied cosmetic product to the body on the day of the appointment. Clinical examination and confirmation of the criteria for inclusion and non-inclusion by the doctor.
From T0 to T3 Weeks: The volunteers apply the study product at home and under the normal conditions of use of the product, in place of that usually used, and according to the instructions mentioned in the questionnaire (frequency and duration of use, region and mode of application). The volunteers evaluate the cosmetic qualities of the product, the assertions and overall satisfaction. The volunteers must not use new cosmetic products (with the exception of that of the study). The volunteers must not change their habits of use of cosmetic products other than the product having the same effects as the test product.
At T3 Weeks: The volunteers arrive for consultation without having applied cosmetic product to the body on the day of the appointment. Clinical examination with a doctor, who also confirms that the protocol has been well observed. The volunteers hand over the evaluation questionnaire and the test product. The bottles recovered are weighed.
Monitoring of the Study
27 adult volunteers were recruited for the mango product.
No subject was excluded from the studies. The characteristics of the volunteers are mentioned in table VIII.

(84) TABLE-US-00008 TABLE VIII CHARACTERISTICS OF THE VOLUNTEERS - MANGO ECO SHOWER GEL 27 SUBJECTS Age mean of the study: 56 years (min. age: 27 years; max. age: 74 years) Skin type: Very dry  7% Dry 78% Normal 15%
Results and Discussion: Assessment of the Skin Tolerance

(85) For 59.3% of the volunteers, the possible clinical signs (dryness) present as D0 have disappeared, showing improvement in the skin condition, or have not changed. These volunteers did not note any skin reaction or functional sign related to the use of the test mango Eco shower gel and judged the tolerance to be excellent.

(86) For 37.0% of the volunteers, no clinical sign was observed at D0, as at D21. These volunteers did not note any skin reaction or functional sign relating to the use of the test mango Eco shower gel and judged the tolerance to be excellent.

(87) In the light of these comments and of the very good tolerance with the majority of the volunteers, the overall tolerance is judged to be good.