COMPOSITION COMPRISING TWO POLYGLYCERYL FATTY ACID ESTERS

Abstract

The present invention relates to a composition comprising: (a) at least one oil; (b) at least one first polyglyceryl fatty acid ester having an HLB value of 13.0 or more, preferably 13.5 or more, and more preferably 14.0 or more; (c) at least one second polyglyceryl fatty acid ester having an HLB value of 10.0 or less, preferably 9.0 or less, and more preferably 8.0 or less; and (d) water, wherein the composition has a turbidity of 150 NTU or less, preferably 130 NTU or less, and more preferably 110 NTU or less. The composition according to the present invention can be less sticky.

Claims

1. A composition in the form of a nano- or micro-emulsion, comprising: (a) at least one oil; (b) at least one first polyglyceryl fatty acid ester having an HLB value of 13.0 or more; (c) at least one second polyglyceryl fatty acid ester having an HLB value of 10.0 or less; and (d) water, wherein the composition has a turbidity of 150 NTU or less.

2. The composition according to claim 1, wherein the average HLB of the (b) first polyglyceryl fatty acid ester(s) and the (c) second polyglyceryl fatty acid ester(s) in the composition ranges from 11.5 to 14.0.

3. The composition according to claim 1, wherein the (a) oil is selected from polar oils.

4. The composition according to claim 1, wherein the amount of the (a) oil(s) in the composition ranges from 0.01% to 20% by weight, relative to the total weight of the composition.

5. The composition according to claim 1, wherein the (b) first polyglyceryl fatty acid ester comprises 2 to 4 glycerol units.

6. The composition according to claim 1, wherein the fatty acid moiety of the (b) first polyglyceryl fatty acid ester comprises 12 or fewer carbon atoms.

7. The composition according to claim 1, wherein the weight ratio of the amount of the (b) first polyglyceryl fatty acid ester(s)/the amount of the (a) oil(s) in the composition ranges from 0.6 to 1.3.

8. The composition according to claim 1, wherein the (c) second polyglyceryl fatty acid ester comprises 2 to 4 glycerol units.

9. The composition according to claim 1, wherein the fatty acid moiety of the (c) second polyglyceryl fatty acid ester comprises 14 or more carbon atoms.

10. The composition according to claim 1, wherein the weight ratio of the amount of the (c) second polyglyceryl fatty acid ester(s)/the amount of the (a) oil(s) in the composition ranges from 0.1 to 0.9.

11. The composition according to claim 1, wherein the weight ratio of (the total amounts of the (b) first polyglyceryl fatty acid ester(s) and the (c) second polyglyceryl fatty acid ester(s))/the amount of the (a) oil(s) is 1.6 or less.

12. The composition according to claim 1, wherein the composition is free from a polyglyceryl fatty acid ester comprising 5 or more glycerol units.

13. The composition according to claim 1, wherein the composition is in the form of an O/W emulsion.

14. The composition according to claim 13, wherein the particle size of the (a) oil is 35 nm or less.

15. A cosmetic process for treating a keratin substance, comprising: applying the composition according to claim 1 to the keratin substance.

Description

EXAMPLES

[0229] 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.

Examples 1 and 2 and Comparative Example 1

[0230] The following compositions according to Examples 1 and 2 and Comparative Example 1, shown in Table 1, were prepared by mixing the components shown in Table 1 as follows.

Examples 1 and 2

[0231] (1) The ingredients of Phase A were heated at about 60° C. and mixed to form a uniform mixture of Phase A ingredients. [0232] (2) The ingredients of Phase B were heated at about 60° C. and mixed to form a uniform mixture of Phase B ingredients. [0233] (3) The mixture of the Phase A ingredients and the mixture of the Phase B ingredients were cooled to about 30° C. or less. [0234] (4) The mixture of the Phase A ingredients was added to the mixture of the Phase B ingredients under gentle mixing. [0235] (5) The ingredient of Phase C was then added to the mixture obtained in the above step (4) at room temperature to prepare a composition.

Comparative Example 1

[0236] (1) The ingredients of Phase A were heated at about 70° C. and mixed to form a uniform mixture of Phase A ingredients. [0237] (2) The ingredients of Phase B were heated at about 70° C. and mixed to form a uniform mixture of Phase B ingredients. [0238] (3) The mixture of the Phase A ingredients and the mixture of the Phase B ingredients were cooled to about 30° C. or less. [0239] (4) The mixture of the Phase B ingredients was added to the mixture of the Phase A ingredients under gentle mixing. [0240] (5) The ingredients of Phase C were then added to the mixture obtained in the above step (4) at room temperature to prepare a composition.

[0241] The compositions according to Examples 1 and 2 and Comparative Example 1 were in the form of an O/W emulsion.

[0242] The numerical values for the amounts of the components shown in Table 1 are all based on “% by weight” as active raw materials.

TABLE-US-00001 TABLE 1 Comp. Ingredients Ex. 1 Ex. 2 Ex. 1 A PG-4 Caprate (HLB: 14) 1.00 1.03 — PG-2 Oleate (HLB: 8) 0.33 — — PG-2 Isostearate (HLB: 8) — 0.30 — PG-5 Laurate (HLB: 11) — — 1.33 Isopropyl Myristate 1.00 1.00 1.00 Phenoxyethanol — — 0.50 Glycerin 0.50 0.83 — Water 0.50 0.17 — B Sodium Lauroyl Glutamate 0.20 0.20 0.20 Glycerin 9.50 9.50 — Propylene Glycol 3.00 3.00 3.00 Phenoxyethanol 0.50 0.50 — Disodium EDTA 0.10 0.10 0.10 Water 83.17 83.17 83.67 C Xanthan Gum 0.20 0.20 0.20 Glycerin — — 10 Total (%) 100 100 100 Stickiness (g) −106 −147 −217 Turbidity (NTU) 32.7 102 46.7 Average Droplet Size (nm) 20.2 13.7 36.7

[0243] [Evaluations]

[0244] (Stickiness)

[0245] The stickiness of the compositions according to Examples 1 and 2 and Comparative Example 1 was measured as follows.

[0246] Sample Preparation

[0247] 30 mg each of the compositions according to Examples 1 and 2 and Comparative Example 1 was evenly applied onto a polyurethane substrate with a size of 3 cm×3 cm (width)×4 mm (thickness) (P002-001 from Beaulax Corp).

[0248] The composition was dried at 20° C. for 30 minutes, and spread with the fingers.

[0249] Measurement

[0250] The stickiness of each composition was measured by using Texture Analyzer TA.XT plus with a 20-mm cylinder made of aluminum (P/20). The measurement conditions were as follows.

[0251] Test mode: Compression

[0252] Pre-Test-Speed: 10 mm/sec

[0253] Test Speed: 0.1 mm/sec

[0254] Post-Test-Speed: 10 mm/sec

[0255] Count: 10

[0256] Data Analysis

[0257] The average of 10 counts of negative peaks (g) was determined as the stickiness.

[0258] The results are shown in Table 1 as “g”. The smaller the g value is, the less sticky the composition is.

[0259] (Turbidity)

[0260] The turbidity of the compositions according to Examples 1 and 2 and Comparative Example 1 was measured at room temperature by using a turbidimeter (2100Q portable, Hach Company).

[0261] The results are shown in Table 1 as “NTU”. The smaller the NTU value is, the more transparent the composition is.

[0262] (Particle Size)

[0263] The particle size (nm) of the oil droplets in the compositions according to Examples 1 and 2 and Comparative Example 1 was measured by the Particle Size Analyzer ELSZ-2000ZS (Otsuka Electronics Co., Ltd.).

[0264] The results are shown in Table 1.

[0265] Examples 1 and 2 show that the use of a combination of the two different types of polyglyceryl fatty acid esters can provide less stickiness.

[0266] Comparative Example 1 shows that the use of a single polyglyceryl fatty acid ester provides more stickiness as compared to Examples 1 and 2.