Foamable oil-water emulsion

Abstract

The present invention relates to foamable oil-in-water emulsions containing: A) one or more emulsifiers, at least one of which is a non-ionic emulsifier, B) one or more cotensides, C) one or more oils, D) optionally, one or more polar solubilizers, E) optionally, auxiliary and additive substances, F) one or more surfactants, G) water, H) optionally, water-soluble substances, provided that the water content of the emulsion is 70% by weight and the concentration of surfactant(s) F) is from 0.01 to less than 10% by weight, each based on the entire emulsion. The invention further relates to a method for producing the oil-water emulsions according to the invention, to foams obtained from these oil-water emulsions, to a method for producing the foams, and to the application of the oil-water emulsions according to the invention and to the foams produced therefrom.

Claims

1. A cosmetic composition, comprising: a stable foam obtained from a foamable oil-in-water emulsion, said emulsion comprising: A) one or more emulsifiers, wherein at least one nonionic emulsifier is present, B) one or more co-surfactants, C) one or more oils, D) optionally one or more polar solubilizers, E) optionally one or more auxiliaries and/or additives, F) one or more surfactants selected from the group consisting of isethionates, sulfosuccinates, amphopropionates, betaines, amphoacetates, glycosides, amino acid surfactants, polyethylene glycol lauryl ether and sarcosinates, G) water, and H) optionally one or more water-soluble substances, with the proviso that the water content of the emulsion is 70% by weight and the content of surfactant (F) is from 0.01 to less than 10% by weight, based on the weight of the total emulsion; with the proviso that the composition does not contain a propellant gas; wherein the emulsifier A) is an emulsifier mixture Al) consisting of: a) at least one nonionic primary emulsifier, and b) at least one secondary emulsifier containing one or more acid functions and whose acid function is optionally completely or partially neutralized; wherein the primary nonionic emulsifier component (a) comprises one or more polyglycerol laurates or mixtures of polyglycerol laurates with one or more sorbitan laurates.

2. The cosmetic composition as claimed in claim 1, wherein said oil-in-water emulsion comprises, as surfactant (F), one or more surfactants selected from the group consisting of sodium cocoyl isethionate, sodium lauroyl sarcosinate, disodium laureth sulfosuccinate, sodium cocoamphopropionate, fatty alcohol C8-14-alkyl glycosides, disodium cocoyl glutamate, betaine and PEG-6 lauryl ether.

3. The cosmetic composition as claimed in claim 1, wherein in said oil-in-water emulsion, at least one auxiliary and/or additive (E) is present and is selected from the group consisting of pH regulators, consistency regulators, stabilizers, humectants, dyes, care substances, active ingredients, odor correctors, plant extracts, perfumes, preservatives, film formers and mixtures thereof.

4. The cosmetic composition as claimed in claim 1, wherein said oil-in-water emulsion comprises at least one aliphatic co-surfactant (B), selected from the group consisting of n-pentanol, n-hexanol, 1,2-hexanediol, 1,2-heptanediol and 1,2-octanediol, or at least one aromatic co-surfactant (B), selected from the group consisting of phenoxyethanol, benzyl alcohol and alkyl paraben esters, alone or in mixtures with one another and/or in mixtures with a preservative.

5. The cosmetic composition as claimed in claim 1, comprising, as secondary emulsifier component b), one or more partially neutralized or neutralized citric acid partial esters, the hydrophobic radicals of which contain in each case 10 to 18 carbon atoms.

6. The cosmetic composition as claimed in claim 1, wherein the emulsifier A) consists exclusively of nonionic emulsifiers.

7. A method for producing a foamable oil-in-water emulsion, comprising: mixing an oil phase comprising A) one or more emulsifiers, wherein at least one nonionic emulsifier is present, B) one or more cosurfactants, C) one or more oils, D) 0 to <10% by weight, based on the weight of the total oil phase, of one or more polar solubilizers, E) optionally auxiliaries and additives, is mixed with water G), which optionally comprises one or more water-soluble substances H), and one or more surfactants F) selected from the group consisting of isethionates, sulfosuccinates, amphopropionates, betaines, amphoacetates, glycosides, amino acid surfactants, polyethylene glycol lauryl ether and sarcosinates to give an emulsion with a water content of 70% by weight and a content of surfactants of from 0.01 to less than 10% by weight; wherein the emulsifier A) is an emulsifier mixture A1) consisting of: a) at least one nonionic primary emulsifier, and b) at least one secondary emulsifier containing one or more acid functions and whose acid function is optionally completely or partially neutralized; wherein the primary nonionic emulsifier component (a) comprises one or more polyglycerol laurates or mixtures of polyglycerol laurates with one or more sorbitan laurates, wherein the emulsion is able to form a stable foam.

8. The cosmetic composition as claimed in claim 1, wherein the foam bubbles contain air as gas mixture.

9. A method of producing a foam, comprising: foaming an oil-in-water emulsion to obtain a stable foam, said oil-in-water emulsion comprising: A) one or more emulsifiers, wherein at least one nonionic emulsifier is present, B) one or more co-surfactants, C) one or more oils, D) optionally one or more polar solubilizers, E) optionally one or more auxiliaries and/or additives, F) one or more surfactants selected from the group consisting of isethionates, sulfosuccinates, amphopropionates, betaines, amphoacetates, glycosides, amino acid surfactants, polyethylene glycol lauryl ether and sarcosinates, G) water, and H) optionally one or more water-soluble substances, with the proviso that the water content of the emulsion is 70% by weight and the content of surfactant (F) is from 0.01 to less than 10% by weight, based on the weight of the total emulsion; with the proviso that the oil-in water emulsion does not contain a propellant gas; wherein the emulsifier A) is an emulsifier mixture A1) consisting of: a) at least one nonionic primary emulsifier, and b) at least one secondary emulsifier containing one or more acid functions and whose acid function is optionally completely or partially neutralized; wherein the primary nonionic emulsifier component (a) comprises one or more polyglycerol laurates or mixtures of polyglycerol laurates with one or more sorbitan laurates.

10. The method as claimed in claim 9, wherein said foam is a cosmetic, dermatological or pharmaceutical foam or a household cleaner foam.

11. The method as claimed in claim 9, wherein said foam is suitable for face and body care, baby care, as sunscreen and/or as make-up remover or for the cleaning and care of surfaces in the home and in industry.

12. The method as claimed in claim 9, wherein the foam is foamed by introducing ambient air.

13. A cosmetic composition, comprising: a stable foam obtained from a foamable oil-in-water emulsion, said emulsion comprising: A) one or more emulsifiers, wherein at least one nonionic emulsifier is present, B) one or more co-surfactants, C) one or more oils, D) optionally one or more polar solubilizers, E) optionally one or more auxiliaries and/or additives, F) one or more foam surfactants selected from the group consisting of isethionates, sulfosuccinates, amphopropionates, betaines, amphoacetates, glycosides, amino acid surfactants, polyethylene glycol lauryl ether and sarcosinates which aid the production of foam without the use of a synthetic propellant, G) water, and H) optionally one or more water-soluble substances, with the proviso that the water content of the emulsion is 70% by weight and the content of surfactant (F) is from 0.01 to less than 10% by weight, based on the weight of the total emulsion; with the proviso that the composition does not contain a propellant gas; and wherein the foam contains ambient air and does not contain a synthetic gas mixture; wherein the emulsifier A) is an emulsifier mixture A1) consisting of: a) at least one nonionic primary emulsifier, and b) at least one secondary emulsifier containing one or more acid functions and whose acid function is optionally completely or partially neutralized; wherein the primary nonionic emulsifier component (a) comprises one or more polyglycerol laurates or mixtures of polyglycerol laurates with one or more sorbitan laurates.

14. A method of producing a foam, comprising: foaming an oil-in-water emulsion to obtain a stable foam, said oil-in-water emulsion comprising: A) one or more emulsifiers, wherein at least one nonionic emulsifier is present, B) one or more co-surfactants, C) one or more oils, D) optionally one or more polar solubilizers, E) optionally one or more auxiliaries and/or additives, F) one or more foam surfactants selected from the group consisting of isethionates, sulfosuccinates, amphopropionates, betaines, amphoacetates, glycosides, amino acid surfactants, polyethylene glycol lauryl ether and sarcosinates which aid the production of foam without the use of a synthetic propellant, G) water, and H) optionally one or more water-soluble substances, with the proviso that the water content of the emulsion is 70% by weight and the content of surfactant (F) is from 0.01 to less than 10% by weight, based on the weight of the total emulsion; with the proviso that the oil-in water emulsion does not contain a propellant gas; and wherein the foam contains ambient air and does not contain a synthetic gas mixture; wherein the emulsifier A) is an emulsifier mixture Al) consisting of: a) at least one nonionic primary emulsifier, and b) at least one secondary emulsifier containing one or more acid functions and whose acid function is optionally completely or partially neutralized; wherein the primary nonionic emulsifier component (a) comprises one or more polyglycerol laurates or mixtures of polyglycerol laurates with one or more sorbitan laurates.

Description

EXAMPLES

(1) The following substances were used in the examples below: Gingko extract: Vegetol Gingko Biloba LC416 Hydro=aqueous gingko extract (Gattefosse) Perlastan L 30: sodium laurylsarcosinate (Schill & Seilacher) Meadowfoam seed oil: extracted oil from the seeds from Limnanthes Alba Hostapon SCI: sodium coconut fatty acid isethionate (Clariant) Glucopon 650: C8-C16 polyalkyl glucoside (Cognis) Plantapon ACG: sodium cocoyl glutamate (Cognis) Laureth 6.: Rewopal LA6 (Evonik Goldschmidt) Emulgade CM: Cetearyl Isononate and Ceteareth-20 and Cetearyl Alcohol and Glyceryl Stearate and Glycerol and Ceteareth-12 and Cetyl Palmitate (Cognis) Eumulgin HRE 40: PEG-40 hydrogenated castor oil (Cognis) Tego Wipe DE: mixture of diethylhexyl carbonate, polyglyceryl-4 laurate; phenoxyethanol; methylparaben, dilauryl citrate; ethylparaben; butylparaben; propylparaben and isobutylparaben; (Evonik Goldschmidt) Tego Wipe Flex: mixture of 56% emollient (ethylhexyl stearate) 29% emulsifier (sorbitan laurate; polyglyceryl-4 laurate; dilauryl citrate), 15% phenoxyethanol (ethylhexyl stearate, phenoxyethanol, polyglyceryl-4 laurate, sorbitan laurate and dilauryl citrate); (Evonik Goldschmidt) Tego Wipe R4: 66% emollients (ethylhexyl stearate; cotton seed oil), 22% emulsifiers (sorbitan laurate; polyglyceryl-4 laurate; dilauryl citrate), 12% phenoxyethanol (Evonik Goldschmidt) Rewopol SB FA 30 B: disodium laureth sulfosuccinate (Evonik Goldschmidt) Rewoteric AM KSF 40: sodium cocoamphopropionate (Evonik Goldschmidt) TEGINACID H: mixture of glyceryl stearate and ceteth-20 (Evonik Goldschmidt) Tegosoft CR: cetyl ricinoleate (Evonik Goldschmidt) Tegosoft Liquid: cetearyl ethylhexanoate (Evonik Goldschmidt) Tegosoft APS: PPG-11 stearyl ether (Evonik Goldschmidt) Tegosoft SH: stearyl heptanoate (Evonik Goldschmidt) Tegosoft P: isopropyl palmitate (Evonik Goldschmidt) Tegosoft DC: decyl cocoate (Evonik Goldschmidt) Tegosoft TN: C12-15 alkyl benzoate (Evonik Goldschmidt) Tegosoft DEC: diethylhexyl carbonate (Evonik Goldschmidt) TEGO Alkonaol 18: stearyl alcohol (Evonik Goldschmidt) TEGO Betain 810: capryl/capramidopropyl betaine (Evonik Goldschmidt) TEGO Cosmo C 100: creatine (Evonik Goldschmidt) VARISOFT PATC: palmitamidopropyltrimonium chloride (Evonik Goldschmidt) Crodasinic LS30/NP: sodium lauroyl sarcosinate (Croda)

Example 1

Production of O/W Emulsions According to the Invention starting from PIC microemulsions

(2) Formulations were produced from the components given in Tables 1 to 3. For this purpose, firstly a microemulsion was produced from the components referred to by M.

(3) The microemulsion was then obtained by mixing all of the components listed under M, with the exception of the water, with stirring to give a clear and homogeneous oil phase. This oil phase was then poured into water at room temperature, the water or the aqueous phase being stirred using a single manual stirrer.

(4) The components of the microemulsion given under S were then added with stirring.

(5) TABLE-US-00001 TABLE 1 Example formulations produced via PIC microemulsions (data in % by mass based on the end formulation) Components 1a 1b 1c 1d 1e 1f 1g M Water 85.0 90.0 93.0 91.5 85.0 91.0 90.0 Tego Wipe DE 11.4 5.7 11.4 5.0 Tego Wipe R4 5.0 5.0 5.0 S Crodasinic 3.6 4.3 2.0 3.5 3.0 4.9 LS30/NP Perlastan L-30 3.6 Phenoxyethanol 1.0 Perfume 0.1 Foamability yes yes yes yes yes yes yes Foam stability (%) 75% 75% 75% 75% 75% 75% 75% Foamability after yes yes yes yes yes yes yes storage for 3 months at 40 C. Stability in the 3 stable stable stable stable stable stable stable temperature ranges

(6) TABLE-US-00002 TABLE 2 Example formulations produced via PIC microemulsions (data in % by mass, based on the end formulation) Components 1h 1i 1j 1k 1l 1m 1n M Water 90.3 90.3 90.3 90.3 91.5 91.5 92.9 Tego Wipe Flex 4.0 4.0 4.0 4.0 4.0 4.0 4.0 Tegosoft CR 0.8 Meadowfoam 0.8 seed Oil Tegosoft liquid 0.8 Tegosoft APS 0.8 Tegosoft SH 0.8 0.8 0.8 S Crodasinic 4.9 4.9 4.9 4.9 LS30/NP Rewoteric AM 3.7 KSF Rewopol SB 3.7 FA 30 Hostapon SCI 2.3 Foamability yes yes yes yes yes yes yes Foam stability (%) 100 75 100 75 75 100 75 Foamability after yes yes yes yes yes yes yes storage for 3 months at 40 C. Stability in the stable stable stable stable stable stable stable 3 temperature ranges

(7) TABLE-US-00003 TABLE 3 Example formulations produced via PIC microemulsions (data in % by mass, based on the end formulation) Component 1o 1p 1q 1r 1s 1t 1u M Water 93.3 92.1 94.0 90.1 94.0 94.0 94.0 Tego Wipe Flex 4.0 4.0 4.0 4.0 4.0 4.0 4.0 Tegosoft SH 0.8 0.8 0.8 0.4 0.4 0.4 0.4 Gingko extract 0.1 0.1 0.1 0.1 Phenoxyethanol 0.4 0.4 0.4 0.4 Silk Beauty 0.1 0.1 0.1 0.1 S Glucopon 650 1.7 Crodasinic LS30/NP 4.9 1.0 Plantapon ACG 2.9 Laureth-6 0.3 Rewopol SB FA 30 1.0 0.3 Perfume 0.2 0.2 0.2 Foamability yes yes yes yes yes yes yes Foam stability (%) 75 100 50 100 100 100 100 Foamability after yes yes yes yes yes yes yes storage for 3 months at 40 C. Stability in the 3 stable stable stable stable stable stable stable temperature ranges

Example 2

Production of O/W Emulsions According to the Invention Starting from PIT Microemulsions

(8) Formulations were produced from the components given in Table 4. For this purpose, firstly a microemulsion was produced from the components listed under M by stirring the specified components.

(9) The components of the microemulsion given under S were then added with stirring.

(10) TABLE-US-00004 TABLE 4 Example formulations produced via PIT microemulsions (data in % by mass, based on the end formulation) Components 2a 2b 2c 2d 2e 2f M Water 73.65 77.55 74.85 74.85 75.65 74.85 Emulgade CM 15.00 15.00 15.00 15.00 15.00 15.00 Glycerol 99.5% vegetable 5.00 5.00 5.00 5.00 5.00 5.00 Eumulgin HRE 40 0.35 0.35 0.35 0.35 0.35 0.35 Vitamin E acetate 0.10 0.10 0.10 0.10 0.10 0.10 Preservative 0.85 0.85 0.85 0.85 0.85 0.85 Perfume oil 0.15 0.15 0.15 0.15 0.15 0.15 S Crodasinic LS30/NP 4.90 1.00 Rewoteric AM KSF 3.70 Rewopol SB FA 30 3.70 Glucopon 650 2.90 Plantapon ACG 3.70 Foamability yes yes yes yes yes yes Foam stability (%) 100 75 75 100 75 75 Foamability after storage yes yes yes yes yes yes for 3 months at 40 C. Stability in the 3 stable stable stable stable stable stable temperature ranges

Example 3

Producing O/W Emulsions not According to the Invention in Accordance with the Prior Art

(11) O/W emulsions were produced from the components given in Tables 5 to 11. The production was carried out as stated in the corresponding documents.

(12) TABLE-US-00005 TABLE 5 Composition of the O/W emulsion in accordance with Uniquema, as described in the formula (WI 2025-109/1) from the formula collection from Uniquema (data in % by mass) Arlasolve 200 Liquid/GEL 3.800 Arlacel 987 1.100 Atlas G-2330 3.000 Arlamol E 3.500 Prisorine 2021 8.000 Prisorine 2034 1.000 Bronopol 30% strength 0.270 Pricerine 9091 (glycerol) 4.000 Town water 41.730 Arlasilk Phospholipid PLN 2.000 Propylene glycol (1,2-propanediol) 3.000 Town water 2 20.000 Tego Betain 810 8.600 Foamability yes Foam stability (%) 50 Foamability after storage for 3 no months at 40 C. Stability in the 3 temperature unstable ranges at 40 C.

(13) TABLE-US-00006 TABLE 6 Composition of the O/W emulsion in accordance with formula WR 19/01-19 of the formula collection from Evonik Goldschmidt GmbH, which can be seen on their Internet site (data in % by mass). Teginacid H Phase A 3.900 Tego Alkanol 18 1.300 Tegosoft P 3.900 Tegosoft DC 3.200 Tegosoft TN 2.500 Glycerin Ph EurIII 99.5% Phase B 1.500 Water 77.000 Tego Betain 810 Phase C 6.000 Phenonip Phase D 0.700 Foamability yes Foam stability (%) 50 Foamability after storage for 3 no months at 40 C. Stability in the 3 temperature unstable at ranges 40 C.

(14) TABLE-US-00007 TABLE 7 Composition of the O/W emulsion in accordance with formula ADP-5545-160 as described in the formula collection from Evonik Goldschmidt GmbH (data in % by mass). Varisoft PATC Phase A 6.000 Tego Alkanol 18 2.000 Tegosoft P 6.000 Tegosoft DC 3.000 Tegosoft TN 3.000 Amilan Guar 36 0.750 Glycerin Phase B 3.000 Water 67.050 Tego Cosmo C100 0.500 Tego Betain 810 Phase C 8.000 Phenonip Phase D 0.700 Citric acid 10% strength Phase E 1.253 Foamability yes Foam stability (%) 50 Foamability after storage for 3 no months at 40 C. Stability in the 3 temperature unstable ranges at 40 C.

(15) TABLE-US-00008 TABLE 8 Composition of the O/W emulsion in accordance with formula ADP-5545-118 (Foaming Lotion with Varisoft PATC) as described in the formula collection from Evonik Goldschmidt GmbH (data in % by mass). Varisoft PATC Phase A 6.000 Tego Alkanol 18 2.000 Tegosoft P 6.000 Tegosoft DC 3.000 Tegosoft TN 3.000 Glycerin Ph EurIII 99.5% Phase B 2.000 Water 62.300 Tego Betain 810 Phase C 15.000 Phenonip Phase D 0.700 Foamability yes Foam stability (%) 50 Foamability after storage for 3 no months at 40 C. Stability in the 3 temperature unstable ranges at 40 C.

(16) TABLE-US-00009 TABLE 9 Composition of the O/W emulsions A, B and C in accordance with Emulsion pump foams Table 2/3 (Specialty Chemicals Magazine November 2005 page 38) (data in % by mass). Product name Composition A B C Imwitor 380 Glyceryl Phase A 3.000 3.000 3.000 cocoate/citrate/ lactate Cosmacol EMI di-C12-13-alkyl Phase A 3.000 3.000 3.000 malate Cosmacol EOI C12-13 alkyl Phase A 2.500 2.500 2.500 octanoate Miglyol 812N Caprylic/capric Phase A 5.000 5.000 5.000 triglyceride Avocado Oil Persea Phase A 3.000 3.000 3.000 Gratissima oil Abil B 8839 Cyclomethicone Phase A 1.500 1.500 1.500 Glycerin Ph EurIII 99.5% Glycerol Phase B 6.000 6.000 6.000 Rhodicare S Xanthan gum Phase B 0.500 0.500 0.500 Water Phase B ad 100 ad 100 ad 100 Fragrance Phase C q.s. q.s. q.s. Tocopheryl acetate Tocopheryl Phase C 1.000 1.000 1.000 acetate Total 100.000 100.000 100.000 Fraction of the 82.000 95.000 99.000 aforementioned formula A/B/C Crodasinic LS 30 18.000 5.000 1.000 Foamability yes no no Foam stability 25% 0% 0% Foamability after no no no storage for 3 months at 40 C. Stability in the 3 unstable unstable unstable temperature ranges at 40 C. at 40 C. at 40 C.

(17) TABLE-US-00010 TABLE 10 Composition of the O/W emulsions A, B and C in accordance with Emulsion pump foams Table 2/3 (Specialty Chemicals Magazine November 2005 page 38) (in % by mass). Product name Composition A B C Ceralution C Water + capric/caprylic Phase A 10.000 10.000 10.000 triglyceride + glycerol + ceteareth-25 + Na- dicocoylethylenediamine PEG 15 sulfate + Na lauryl lactylate + behenyl alcohol + glyceryl stearate + glyceryl stearate citrate + gum Arabic + xanthan gum + phenoxyethanol + methylparaben + ethylparaben + butylparaben + isobutylparaben Miglyol 829 Caprylic/capric/succinic Phase B 7.000 7.000 7.000 triglyceride Cosacol EMI di-C12-13-alkyl malate Phase B 2.000 2.000 2.000 Avocado oil Persea Gratissima oil Phase B 5.000 5.000 5.000 Tocopheryl acetate Tocopheryl acetate Phase B 1.000 1.000 1.000 Water Aqua Phase C 47.700 47.700 47.700 Avicel in water Aqua with 4% Phase C 25.000 25.000 25.000 microcrystalline cellulose and cellulose gum Rhodicare S Xanthan gum Phase C 0.300 0.300 0.300 D-Panthenol 100% Dexpanthenol Phase C 1.500 1.500 1.500 Fragrance Perfume Phase D q.s. q.s. q.s. Preservative Phenonip Phase D 1.000 1.000 1.000 Total 100.000 100.000 100.000 Fraction of the 50.000 50.000 50.000 aforementioned formulas A/B/C Crodasinic LS 30 16.500 5.000 1.000 Water 33.500 45.000 49.000 Foamability yes no no Foam stability 25% 0% 0% Foamability after no no no storage for 3 months at 40 C. Stability in the 3 unstable unstable unstable temperature ranges at 40 C. at 40 C. at 40 C.

(18) TABLE-US-00011 TABLE 11 Composition of the O/W emulsion in accordance with formula OW 8-92/0 from the formula collection of Sasol AG (data in % by mass). Product name Composition A Water, deionized Water Phase A 5.000 Ceralution F Sodium Phase A 2.000 dicocoylethylenediamine PEG 15 sulfate and sodium lauryl lactylate Laracare A 200 Galactoarabinan Phase A 0.500 Glycerin Ph EurIII Glycerol Phase A 6.000 99.5% Ceralution H Behenyl alcohol and Phase B 1.000 glyceryl stearate and glyceryl stearate citrate and sodium dicocoylethylenediamine PEG 15 sulfate Marlipal O13/120 Caprylic/capric/succinic Phase B 1.000 triglyceride Miglyol 812N Caprylic/capric Phase B 7.000 triglyceride Cosmacol EMI di-C12-13-alkyl malate Phase B 3.000 Avocado oil Persea Gratissima oil Phase B 10.000 Vitamin E acetate Tocopheryl acetate Phase B 1.000 Water Water Phase C 61.500 D-Panthenol 100% Dexpanthenol Phase C 1.500 Preservative Phenonip Phase D 0.500 Total 100.000 Fraction of the 50.000 aforementioned formula A Crodasinic LS 30 5.000 Water 45.000 Foamability yes Foam stability 25% Foamability after no storage for 3 months at 40 C. Stability in the 3 unstable temperature ranges at 40 C.
Definition: Long-Term Stability

(19) The O/W emulsions produced in examples 1 to 3 were stored in closed screw-top jars in a heating cabinet at RT, 40 C. and 4 C. in each case for 3 months (corresponding to IFSCC Monograph Number 2, page 8, chapter IV I a.) Following storage, a visual check was made whether a demixing/phase separation was observed, which points to destruction of the O/W emulsion (unstable). It was established that the O/W emulsions according to the invention as per examples 1 and 2 were still stable, whereas in the case of the comparison emulsions from example 3, in each case a demixing could be observed.

(20) Definition: Testing the Foamability/Foam Stability

(21) Experiments relating to the foamability of the examples and the stability of the foam were tested. For this purpose, the example formulas were transferred to an Elegant Foamer Line M3 foam dispenser from Rexam Airspray. Then, 10 pump strokes 0.4 g of product were placed in a 5 cm high beaker with a capacity of 25 ml.

(22) The initial foam height and the foam stability after 3 min was then evaluated. The product is foamable if the beaker can be filled by 10 pump strokes of the foam dispenser. Adequate foam stability is present if the foam height collapses after 3 minutes not by 50% or more than 50%. This can be shown clearly. The figure 75% gives an estimation which makes it clear that the foam has broken, but not by 50% or more. 100% indicates that the foam has not changed after 3 minutes. Foams with a figure of 100% or 75% have an adequate foam stability. Foams with a figure of 50% or less do not have an adequate foam stability, with foams having a figure of 25% and 0% being absolutely unacceptable as foam.

(23) The results of the tests into long-term stability, foamability and foam stability are given in tables 1 to 11.

(24) It is clearly evident that a good foamability of the O/W emulsions according to the invention is present and that the foams produced from the O/W emulsions according to the invention lead to a foam which is more stable than those foams which have been produced from O/W emulsions according to the prior art.

(25) Absorption BehaviorSensory Test

(26) Test Procedure

(27) The hands are cleaned with 1 g of Estesol (skin cleaner from Evonik Stockhausen GmbH). After a drying time of 5 min, 0.75 g of reference product, here STOKO soft+care (a gel from Evonik Stockhausen GmbH) or Stokolan (an O/W cream from Evonik Stockhausen GmbH), is rubbed in and the absorption time is noted. The hands are then cleaned again with 1 g of Estesol and, after 5 min, the test product according to the invention, here foam 1s, is applied. The absorption time is noted. A questionnaire is then completed.

(28) Result of a Test Panel with 10 Subjects

(29) The foam 1S absorbed 27% more quickly than STOKO soft+care and 56% more quickly than Stokolan.

(30) In the direct comparison, 5 subjects preferred the foam 1s, 4 subjects STOKO soft+care and 1 subject found both equally good.

(31) In the direct comparison, 8 subjects preferred the foam 1s and 2 subjects Stokolan.