Aqueous oil in water micro-emulsions, and product

Abstract

Disclosed are clear, aqueous perfume compositions which are free of ethanol. There is further provided a perfume composition which is clear, provides a good skin feeling, and good air drying properties on the skin.

Claims

1. An aqueous oil in water micro-emulsion consisting of: i) an odoriferous oil phase ii) at least one non-ionic surfactant iii) at least one co-solvent selected from the group consisting of: isosorbide, isosorbide ethers, solketal, solketal ethers, and mixtures thereof, iv) optionally, at least one solubilizer selected from the group consisting of: glycerol derivatives and diols, and mixtures thereof, and, wherein the micro-emulsion comprises up to 15% wt. of the odoriferous oil phase, and at least 65% wt. of water.

2. An aqueous oil in water micro-emulsion according to claim 1 wherein the at least one non-ionic surfactant has a HLB of 8 to 18.

3. A consumer product comprising an aqueous oil in water micro-emulsion according to claim 2.

4. An aqueous oil in water micro-emulsion according to claim 1 wherein the at least one co-solvent is selected from the group consisting of: a compound of formula (A) ##STR00003## wherein R.sup.1 is hydrogen, methyl, ethyl, C.sub.3-C.sub.5 alkyl, or C.sub.2-C.sub.5 hydroxy alkyl; and, a compound of formula (B) ##STR00004## wherein R.sup.2 and R.sup.3 are independently of each other selected from hydrogen, methyl, ethyl, C.sub.3-C.sub.5 alkyl, and C.sub.2-C.sub.5 hydroxy alkyl.

5. An aqueous oil in water micro-emulsion according to claim 1 wherein the at least one co-solvent is selected from the group consisting of: isosorbide, solketal, 4-(methoxymethyl)-2,2-dimethyl-1,3-dioxolane, 4-(ethoxymethyl)-2,2-dimethyl-1,3-dioxolane, 3,6-dimethoxyhexahydrofuro[3,2-b]furan, and mixtures thereof.

6. An aqueous oil in water micro-emulsion according to claim 1 wherein the at least one solubilizer is selected from the group consisting of: 1, 2- propanediol, 1, 3 - propanediol, 1, 2-pentandiol, 2-methyl-pentan-2,4-diol, 1,2-hexanediol, 1,2-octanediol, dipropylene glycol propyl ether, dipropylene glycol isobornylether, and mixtures thereof.

7. A consumer product comprising an aqueous oil in water micro-emulsion according to claim 1.

Description

EXAMPLE 1

(1) Several composition were prepared with the ingredients (amounts given in % by weight) listed in Table 1, as follows.

(2) In a beaker equipped with a stirrer and at room temperature, all ingredients marked with (A) in Table 1 were mixed until they dissolved. To the resulting aqueous phase the odoriferous oil phase (marked with (B) in Table 1) was added with constant low stirring speed. Clear solutions were thus obtained.

(3) Three freeze-thaw cycles were passed to control the reversibility of the micro-emulsion formation. All eight compositions successfully passed the freeze-thaw cycles, confirming that a micro-emulsion was obtained.

(4) TABLE-US-00001 TABLE 1 Example 1-1 Ingredient comparison 1-2 1-3 1-4 1-5 1-6 1-7 1-8 odoriferous oil phase (B)  8 8 8 8 8 8  8 8 non-ionic surfactant (A) Barsolve Plus.sup.1 10 8 8 8 8 — 14 — Radia Easysurf 6881.sup.2 — — — 5 — — — — Oramix.sup.3 — — — — 2 — — — Eumulgin L.sup.4 — — — — — 14  — — Cremophor ® RH 40.sup.5 12  Solubilizer (A) 1,2 Hexanediol  9 7 7 1 3 3 — 5 Lipoxol.sup.6 3 — — Co-solvent (A) Solketal — 6 — — — 5  8 5 Isosorbide — — 6 5 5 — — — dimethylether Water (A) 73 71  71  73  74  67  70 70  .sup.1Surfactant mixture (comprising 40-60% Trideceth-9, 20-40% PEG 40 Hydrogenated castor oil, and up to 5% Polysorbate-20) marketed by Barnet .sup.2C8/C10 polyglycosides marketed by Oleon .sup.3C8/C10 polyglucosides marketed by Seppic .sup.4PPG-1-PEG-9 Lauryl Glycol Ether marketed by Cognis/BASF AG .sup.5PEG 40 hydrogenated castor oil marketed by Cognis/BASF AG .sup.6PEG 400 marketed by Sasol Olefins and Surfactants GmbH
The formulations were subject to standard stability testing at 4 to 50° C.

EXAMPLE 2

(5) TABLE-US-00002 TABLE 2 Example Ingredient 2-1 2-2 odoriferous oil phase (B) 12 10 non-ionic surfactant (A) Barsolve Plus.sup.1 16 12 Solubilizer (A) 1,2 Hexanediol — 7 Co-solvent (A) Solketal 7 6 Water (A) 65 65

(6) The compositions 2-1 and 2-2 (amounts given in % by weight) were prepared following the general procedure as described in Example 1 and tested under the same conditions. Both successfully passed the freeze-thaw cycles, confirming that a micro-emulsion was obtained.

EXAMPLE 3

(7) The compositions were evaluated by 19 panelists in blind by comparison of two compositions. The compositions were sprayed onto each of the forearms of the panelist and evaluated over a period of 8 hours. Each panelist was asked to the sensory properties as indicated in Table 3 below and the drying time.

(8) TABLE-US-00003 TABLE 3 Evaluation Skin Example feeling Drying speed Tackiness Wetness Greasiness 1-1 − + − − + (comparison) 1-2 ++ ++ ++ + ++ 1-3 +++ ++ +++ ++ ++ 1-5 + ++ ++ + ++ 1-7 + + + − ++ +++: very good ++: good +: acceptable −: not acceptable

(9) As can be seen from the test results above, all formulations containing the co-solvents showed better performance.