Cosmetic composition

Abstract

The present invention relates to a cosmetic composition in the form of a nano- or micro-emulsion, comprising: (a) at least one oil; (b) at least one polyglyceryl fatty acid ester, preferably with a polyglyceryl moiety derived from 3 to 6 glycerins, more preferably 5 or 6 glycerins; (c) at least one hydrotrope; and (d) water. The cosmetic composition according to the present invention has a dispersed phase which has a smaller diameter due to a combination of the (b) polyglyceryl fatty acid ester and the (c) hydrotrope. Therefore, the cosmetic composition can be in the form of a nano- or micro-emulsion with transparent or slightly translucent.

Claims

1. A cosmetic composition comprising: (a) at least one ester oil in an amount ranging from 0.5% to 40% by weight, relative to the total weight of the composition; (b) at least one polyglyceryl fatty acid ester having an HLB value ranging from about 8.0 to about 14.0, wherein the at least one polyglyceryl fatty acid ester is present in an amount ranging from 0.5% to 20% by weight relative to the total weight of the composition; (c) at least one hydrotrope having log P ranging from about −0.7 and about 6, wherein the at least one hydrotrope is present in an amount ranging from 0.1% to 20% by weight, relative to the total weight of the composition; and (d) water, wherein the composition is in the form of a nano-emulsion or micro-emulsion, wherein the at least one polyglyceryl fatty acid ester having an HLB value ranging from about 8.0 to about 14.0 has a polyglyceryl moiety derived from 5 glycerins, and wherein the at least one hydrotrope comprises Vitamin B3.

2. The cosmetic composition according to claim 1, wherein the at least one ester oil is chosen from ester oils of plant or animal origin, synthetic ester oils, or mixtures thereof.

3. The cosmetic composition according to claim 1, where the at least one ester oil is chosen from ester oils having a molecular weight below about 600 g/mol.

4. The cosmetic composition according to claim 1, wherein the total amount of the at least one ester oil ranges from about 1% to about 20% by weight, relative to the total weight of the composition.

5. The cosmetic composition according to claim 1, wherein the at least one polyglyceryl fatty acid ester has an HLB value ranging from about 9.0 to about 13.5.

6. The cosmetic composition according to claim 1, wherein the at least one polyglyceryl fatty acid ester is chosen from polyglyceryl monolaurate comprising 5 glycerol units, polyglyceryl mono(iso)stearate comprising 5 glycerol units, polyglyceryl monooleate comprising 5 glycerol units, polyglyceryl dioleate comprising 5 glycerol units, or mixtures thereof.

7. The cosmetic composition according to claim 1, wherein the at least one polyglyceryl fatty acid ester raw material is chosen from PG-5 laurate, PG-5 stearate, or mixtures thereof.

8. The cosmetic composition according to claim 1, wherein the total amount of the at least one polyglyceryl fatty acid ester ranges from about 1% to about 15% by weight, relative to the total weight of the composition.

9. The cosmetic composition according to claim 1, wherein the weight ratio of the total amount of the at least one polyglyceryl fatty acid ester to the total amount of the oil ranges from about 0.3 to about 6.

10. The cosmetic composition according to claim 1, wherein the total amount of the at least one hydrotrope ranges from about 1% to about 15% by weight, relative to the total weight of the composition.

11. The cosmetic composition according to claim 1, further comprising at least one surfactant chosen from nonionic surfactants different from the at least one polyglyceryl fatty acid ester, ionic surfactants, or mixtures thereof.

12. The cosmetic composition according to claim 1, further comprising at least one additional component chosen from polyols, thickening agents, associative thickeners, or mixtures thereof.

13. The cosmetic composition according to claim 1, wherein the cosmetic composition is in the form of an O/W emulsion, and wherein the at least one ester oil is in the form of a droplet having a number average particle size of about 300 nm or less.

14. The cosmetic composition according to claim 1, wherein the cosmetic composition is in the form of an O/W emulsion, and wherein the at least one ester oil is in the form of a droplet having a number average particle size of about 10 nm to about 150 nm.

15. The cosmetic composition according to claim 1, wherein the cosmetic composition has a transparency greater than about 50%.

16. A non-therapeutic method for treating skin, hair, mucous membranes, nails, eyelashes, eyebrows, and/or scalp, the method comprising applying to the skin, the hair, mucous membranes, the nails, the eyelashes, the eyebrows, and/or the scalp a cosmetic composition comprising: (a) at least one ester oil in an amount ranging from 0.5% to 40% by weight, relative to the total weight of the composition; (b) at least one polyglyceryl fatty acid ester having an HLB value ranging from about 8.0 to about 14.0, wherein the at least one polyglyceryl fatty acid ester is present in an amount ranging from 0.5% to 20% by weight relative to the total weight of the composition; (c) at least one hydrotrope having log P ranging from about −0.7 and about 6, wherein the at least one hydrotrope is present in an amount ranging from 0.1% to 20% by weight, relative to the total weight of the composition; and (d) water, wherein the composition is in the form of a nano-emulsion or micro-emulsion, wherein the at least one polyglyceryl fatty acid ester having an HLB value ranging from about 8.0 to about 14.0 has a polyglyceryl moiety derived from 5 glycerins, and wherein the at least one hydrotrope comprises Vitamin B3.

Description

EXAMPLES

(1) The present invention will be described in more detail by way of examples, which however should not be construed as limiting the scope of the present invention.

(2) (Particle Size) Particle size was measured with a VASCO-2 (CORDOUAN TECHNOLOGIES) with non diluted condition.

(3) (Transparency) Transparency was measured with a V-550 (JASCO) with 2 mm width cell as an average of visible light transmittance (between 400 and 800 nm).

Example 1 and Comparative Example 1

(4) The following compositions according to Example 1 and Comparative Example 1, shown in Table 1, were prepared by mixing the components shown in Table 1 as follows: (1) mixing isopropyl palmitate and polyglyceryl-5 laurate to form an oil phase; (2) heating the oil phase up to around 75° C.; (3) mixing water and Vitamin B3, if used, to form an aqueous phase; and (4) adding the aqueous phase into the oil phase followed by mixing them to obtain an O/W emulsion. The numerical values for the amounts of the components shown in Table 1 are all based on “% by weight” as active raw materials.

(5) TABLE-US-00002 TABLE 1 Example 1 Comparative Example 1 Isopropyl palmitate 15% 15% PG5 laurate* 7.5%  7.5%  Vitamine B3  6%  0% water q.s. q.s. pH 7 7 *SUNSOFT A-121E (Taiyo Kagaku)

(6) The aspect, particle size of oil droplet and transparency of the obtained O/W emulsions according to Example 1 and Comparative Example 1 are shown in Table 2.

(7) TABLE-US-00003 TABLE 2 Example 1 Comparative Example 1 Aspect Slightly Translucent White Particle size (nm) 101.9 1304.0 Transparency (%) 66.9 0.03

Example 2 and Comparative Example 2

(8) The following compositions according to Example 2 and Comparative Example 2, shown in Table 3, were prepared by mixing the components shown in Table 3 as follows: (1) mixing isopropyl palmitate and polyglyceryl-5 laurate to form an oil phase; (2) heating the oil phase up to around 75° C.; (3) mixing water and Vitamin B3, if used, to form an aqueous phase; and (4) adding the aqueous phase into the oil phase followed by mixing them to obtain an O/W emulsion. The numerical values for the amounts of the components shown in Table 3 are all based on “% by weight” as active raw materials.

(9) TABLE-US-00004 TABLE 3 Example 2 Comparative Example 2 Isopropyl palmitate 5% 5% PG5 laurate* 4% 4% Vitamin B3 3.2%   0% Water q.s. q.s. pH 7 7 *SUNSOFT A-121E (Taiyo Kagaku)

(10) The aspect, particle size of oil droplet and transparency of the obtained O/W emulsions according to Example 2 and Comparative Example 2 are shown in Table 4.

(11) TABLE-US-00005 TABLE 4 Example 2 Comparative Example 2 Aspect Slightly Translucent White Particle size (nm) 83.3 3440.8 Transparency (%) 75.0 −0.1

Example 3 and Comparative Example 3

(12) The following compositions according to Example 3 and Comparative Example 3, shown in Table 5, were prepared by mixing the components shown in Table 5 as follows: (1) mixing ethylhexyl palmitate and polyglyceryl-5 laurate to form an oil phase; (2) heating the oil phase up to around 75° C.; (3) mixing water and Vitamin B3, if used, to form an aqueous phase; and (4) adding the aqueous phase into the oil phase followed by mixing them to obtain an O/W emulsion. The numerical values for the amounts of the components shown in Table 5 are all based on “% by weight” as active raw materials.

(13) TABLE-US-00006 TABLE 5 Example 3 Comparative Example 3 Ethylhexyl palmitate  15% 15%  PG5 laurate*   9% 9% Vitamin B3 7.2% 0% water q.s. q.s. pH 7 7 *SUNSOFT A-121E (Taiyo Kagaku)

(14) The aspect, particle size of oil droplet and transparency of the obtained O/W emulsions according to Example 3 and Comparative Example 3 are shown in Table 6.

(15) TABLE-US-00007 TABLE 6 Example 3 Comparative Example 3 Aspect Transparent White Particle size (nm) 59.4 4224.4 Transparency (%) 96.4 −0.1

Example 4 and Comparative Example 4

(16) The following compositions according to Example 4 and Comparative Example 4, shown in Table 7, were prepared by mixing the components shown in Table 7 as follows: (1) mixing ethylhexyl palmitate and polyglyceryl-5 laurate to form an oil phase; (2) heating the oil phase up to around 75° C.; (3) mixing water and Vitamin B3, if used, to form an aqueous phase; and (4) adding the aqueous phase into the oil phase followed by mixing them to obtain an O/W emulsion. The numerical values for the amounts of the components shown in Table 7 are all based on “% by weight” as active raw materials.

(17) TABLE-US-00008 TABLE 7 Example 4 Comparative Example 4 Ethylhexyl palmitate 5% 5% PG5 laurate* 5% 5% Vitamine B3 4% 0% water q.s. q.s. pH 7 7 *SUNSOFT A-121E (Taiyo Kagaku)

(18) The aspect, particle size of oil droplet and transparency of the obtained O/W emulsions according to Example 4 and Comparative Example 4 are shown in Table 8.

(19) TABLE-US-00009 TABLE 8 Example 4 Comparative Example 4 Aspect Transparent White Particle size (nm) 109.8 865.2 Transparency (%) 76.1 −0.1

Example 5 and Comparative Example 5

(20) The following compositions according to Example 5 and Comparative Example 5, shown in Table 9, were prepared by mixing the components shown in Table 9 as follows: (1) mixing isopropyl myristate and polyglyceryl-5 oleate to form an oil phase; (2) heating the oil phase up to around 75° C.; (3) mixing water and Vitamin B3, if used, to form an aqueous phase; and (4) adding the aqueous phase into the oil phase followed by mixing them to obtain an O/W emulsion. The numerical values for the amounts of the components shown in Table 9 are all based on “% by weight” as active raw materials.

(21) TABLE-US-00010 TABLE 9 Example 5 Comparative Example 5 Isopropyl myristate 15% 15% PG5 oleate* 15% 15% Vitamine B3 7.5%   0% Water q.s. q.s. pH 7 7 *SUNSOFT A-171E (Taiyo Kagaku)

(22) The aspect, particle size of oil droplet and transparency of the obtained O/W emulsions according to Example 5 and Comparative Example 5 are shown in Table 10.

(23) TABLE-US-00011 TABLE 10 Example 5 Comparative Example 5 Aspect Transparent White Particle size (nm) 77.03 1293.68 Transparency (%) 94.9 0

(24) As is clear from the above results, it was found that the cosmetic compositions in the form of an O/W emulsion according to the present invention had smaller oil droplets, and therefore, transparent or slightly translucent aspect with better transparency was provided, due to the presence of Vitamin B3.

Example 6 and Comparative Example 6

(25) The following compositions according to Example 6 and Comparative Example 6, shown in Table 11, were prepared by mixing the components shown in Table 11 as follows: (1) mixing ethylhexyl palmitate and polyglyceryl-5 laurate to form an oil phase; (2) heating the oil phase up to around 75° C.; (3) mixing water and Caffeine, if used, to form an aqueous phase; and (4) adding the aqueous phase into the oil phase followed by mixing them to obtain an O/W emulsion. The numerical values for the amounts of the components shown in Table 11 are all based on “% by weight” as active raw materials.

(26) TABLE-US-00012 TABLE 11 Example 6 Comparative Example 6 Ethylhexyl palmitate 5% 5% PG5 laurate* 7.5%   7.5%   Caffeine 1% 0% Water q.s. q.s. pH 7 7 *SUNSOFT A-121E (Taiyo Kagaku)

(27) The aspect, particle size of oil droplet and transparency of the obtained O/W emulsions according to Example 6 and Comparative Example 6 are shown in Table 12.

(28) TABLE-US-00013 TABLE 12 Example 6 Comparative Example 6 Aspect Transparent White Particle size (nm) 91.9 462.8 Transparency (%) 75.5 −0.07

(29) As is clear from the above results, it was found that the cosmetic composition in the form of an O/W emulsion according to the present invention had smaller oil droplets, and therefore, transparent aspect with better transparency was provided, due to the presence of Caffeine.

Example 7 and Comparative Example 7

(30) The following compositions according to Example 7 and Comparative Example 7, shown in Table 13, were prepared by mixing the components shown in Table 13 as follows: (1) mixing isopropyl myristate and polyglyceryl-5 laurate to form an oil phase; (2) heating the oil phase up to around 75° C.; (3) mixing water and Mexoryl SBO, if used, to form an aqueous phase; and (4) adding the aqueous phase into the oil phase followed by mixing them to obtain an O/W emulsion. The numerical values for the amounts of the components shown in Table 13 are all based on “% by weight” as active raw materials.

(31) TABLE-US-00014 TABLE 13 Example 7 Comparative Example 7 Isopropyl myristate 5% 5% PG5 laurate* 4% 4% Mexoryl SBO 6.67%   0% water q.s. q.s. pH 7 7 *SUNSOFT A-121E (Taiyo Kagaku)

(32) The aspect, particle size of oil droplet and transparency of the obtained O/W emulsions according to Example 7 and Comparative Example 7 are shown in Table 14.

(33) TABLE-US-00015 TABLE 14 Example 7 Comparative Example 7 Aspect Transparent White Particle size (nm) 58.0 2216.5 Transparency (%) 88.1 0

Example 8 and Comparative Example 8

(34) The following compositions according to Example 8 and Comparative Example 8, shown in Table 15, were prepared by mixing the components shown in Table 15 as follows: (1) mixing isopropyl myristate and polyglyceryl-5 laurate to form an oil phase; (2) heating the oil phase up to around 75° C.; (3) mixing water and Mexoryl SBO, if used, to form an aqueous phase; and (4) adding the aqueous phase into the oil phase followed by mixing them to obtain an O/W emulsion. The numerical values for the amounts of the components shown in Table 15 are all based on “% by weight” as active raw materials.

(35) TABLE-US-00016 TABLE 15 Example 8 Comparative Example 8 Isopropyl myristate 2% 2% PG5 laurate* 4% 4% Mexoryl SBO 13.13%    0% Water q.s. q.s. pH 7 7 *SUNSOFT A-121E (Taiyo Kagaku)

(36) The aspect, particle size of oil droplet and transparency of the obtained O/W emulsions according to Example 8 and Comparative Example 8 are shown in Table 16.

(37) TABLE-US-00017 TABLE 16 Example 8 Comparative Example 8 Aspect Transparent White Particle size (nm) 22.4 1606.5 Transparency (%) 98.2 0.2

(38) As is clear from the above results, it was found that the cosmetic composition in the form of an O/W emulsion according to the present invention had smaller oil droplets, and therefore, transparent aspect with better transparency was provided, due to the presence of Mexoryl SBO (Jasminol).