EXTERNAL PREPARATION FOR CONCEALING ROUGHNESS

Abstract

An objective of the present invention is to provide an external preparation for concealing roughness that is easy to spread when applied, while also having effects of concealing roughness such as fine wrinkles. The external preparation for concealing roughness of the present invention comprises (a) 1% to 15% by mass of a wax; and (b) 4% to 25% by mass of a non-spherical powder; and has a viscosity of 50,000 to 150,000 mPa.Math.s.

Claims

1. An external preparation for concealing roughness, comprising: (a) 1% to 15% by mass of a wax; and (b) 4% to 25% by mass of a non-spherical powder; and having a viscosity of 50,000 to 150,000 mPa.Math.s.

2. The external preparation as in claim 1, wherein a ratio of the blended amount of the (b) non-spherical powder to the (a) wax is 0.3 to 2.5.

3. The external preparation as in claim 1, further comprising (c) a crosslinked siloxane elastomer.

4. The external preparation as in claim 1, further comprising (d) a spherical powder.

5. The external preparation as in claim 1, which is a water-in-oil emulsion cosmetic or an oil-based cosmetic.

Description

EXAMPLES

[0031] Although the present invention will be explained in further detail by providing examples below, the present invention is not limited in any way thereby. Where not otherwise noted, the blended amounts represent the percentages by mass of the components relative to the systems in which they are blended.

[0032] Before presenting the examples, the evaluation methods used in the present invention will be explained.

1. Roughness Concealing Effects

[0033] Evaluations were performed by means of actual use tests by ten expert panelists. Specifically, each sample was applied to a cheek, and the effect of making roughness such as fine wrinkles and pores on the skin after application visually inconspicuous (roughness concealing effects) was evaluated for each sample in accordance with the below-indicated evaluation criteria.

<Evaluation Criteria>

[0034] A: Eight or more panelists evaluated the results as being good
B: Five to seven panelists evaluated the results as being good
C: Three or four panelists evaluated the results as being good
D: Two or fewer panelists evaluated the results as being good

2. Ease of Application

[0035] Evaluations were performed by means of actual use tests by ten expert panelists. Specifically, each sample was applied to a cheek, and the spreadability when applied was evaluated for each sample in accordance with the below-indicated evaluation criteria.

<Evaluation Criteria>

[0036] A: Eight or more panelists evaluated the results as being good.
B: Five to seven panelists evaluated the results as being good.
C: Three or four panelists evaluated the results as being good.
D: Two or fewer panelists evaluated the results as being good.

3. Stability

[0037] After formulation, the states of formulated substances after being left for two weeks at 50° C. were visually evaluated.

A: Oil/water separation was not observed and the state immediately after formulation was maintained.
B: Some oil/water separation was observed.
C: Oil/water separation was conspicuous.

Examples and Comparative Examples

1. Water-in-Oil Emulsion Cosmetic

[0038] The water-in-oil emulsion cosmetic compositions indicated in Tables 1 to 3 below were formulated. Specifically, the compositions were obtained by dispersing the powder in the oil-based components that were mixed by using a homomixer, then adding the water-based components, which were mixed until homogeneous.

TABLE-US-00001 TABLE 1 Co. Co. Co. Ex. Ex. Ex. Ex. Ex. 1 2 1 2 3 Cyclomethicone 57 32 35 34 9 Diphenylsiloxyphenyl trimethicone 2 2 2 2 2 Trimethylsiloxy silicic acid 4 4 4 4 4 PEG-10 dimethicone 3 3 3 3 3 Talc 5 5 5 3 28 Zinc oxide 5 5 5 5 5 Dimethicone crosspolymer 12.5%/ — 25 25 25 25 cyclopentasiloxane Rice bran wax 3 3 — 3 3 Water 15 15 15 15 15 Butylene glycol 5 5 5 5 5 (Li/Mg/Na) silicate 1 1 1 1 1 Total 100 100 100 100 100 Evaluation Roughness concealing B A C A C Ease of application B A A D D Stability A A A A B

[0039] As indicated in Table 1, a composition (Example 1) in which component (a) (rice bran wax) and component (b) (talc) in the present invention were blended had sufficient roughness concealing effects and spreadability. Additionally, a composition (Example 2) in which a crosslinked siloxane elastomer was blended in addition to component (a) and component (b) had further improved roughness concealing effects and ease of application in comparison with the composition of Example 1.

[0040] On the other hand, in a composition (Comparative Example 1) that did not contain component (a), although a crosslinked siloxane elastomer was blended therein, sufficient roughness concealing effects were not obtained. In a composition (Comparative Example 2) in which the blended amount of component (b) was less than 4% by mass, the spreadability was poor. In a composition (Comparative Example 3) in which the blended amount of component (b) exceeded 25% by mass, sufficient roughness concealing effects were not able to be obtained, and furthermore, the spreadability was poor.

TABLE-US-00002 TABLE 2 Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. 2 3 4 5 6 7 8 9 10 11 Cyclomethicone 32 32 32 32 32 32 32 32 32 32 Diphenylsiloxyphenyl trimethicone 2 2 2 2 2 2 2 2 2 2 Trimethylsiloxy silicic acid 4 4 4 4 4 4 4 4 4 4 PEG-10 dimethicone 3 3 3 3 3 3 3 3 3 3 Talc 5 5 5 5 5 5 5 5 5 5 Zinc oxide 5 5 5 5 5 5 5 5 5 5 Dimethicone crosspolymer 12.5%/ 25 25 25 25 25 25 25 25 25 25 cyclopentasiloxane Rice bran wax 3 — — — — — — — — — Polyethylene wax — 3 — — — 1.5 — — — 1.5 Microcrystalline wax — — 3 — — 1.5 1.5 — 1.5 - Jojoba ester — — — 3 — — 1.5 1.5 1.5 1.5 Candelilla wax — — — — 3 — — 1.5 — — Water 15 15 15 15 15 15 15 15 15 15 Butylene glycol 5 5 5 5 5 5 5 5 5 5 (Li/Mg/Na) silicate 1 1 1 1 1 1 1 1 1 1 Total 100 100 100 100 100 100 100 100 100 100 Evaluation Roughness concealing A A A A A A A A A A Ease of application A A A A A A A A A A Stability A A A A A A A A A A

[0041] As indicated in Table 2, with respect to the composition of Example 2, compositions (Examples 3 to 6) were formulated by changing the type of wax, and compositions (Examples 7 to 11) were formulated by changing the combination of multiple waxes that were blended. No matter which wax was used, there were sufficient roughness concealing effects, and the compositions were easy to apply and had excellent stability.

TABLE-US-00003 TABLE 3 Co. Co. Co. Co. Co. Co. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. 12 13 14 15 16 17 18 19 20 21 4 5 6 7 8 9 Cyclomethicone 32 32 32 32 32 32 32 32 32 32 35 34.5 15 34 9 32 Diphenylsiloxyphenyl 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 trimethicone Trimethylsiloxy silicic acid 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 PEG-10 dimethicone 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 Talc 5 5 5 5 5 5 5 5 5 5 5 5 5 3 28 - Zinc oxide 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 10 Dimethicone crosspolymer 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 12.5%/cyclopentasiloxane (Dimethicone/vinyl 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 dimethicone) crosspolymer (spherical powder) Rice bran wax 3 — — — — — — — — — — 0.5 20 3 3 3 Polyethylene wax — 3 — — — 1.5 — — 1.5 1.5 — — — — — — Microcrystalline wax — — 3 — — 1.5 1.5 — — — — — — — — — Jojoba ester — — — 3 — — 1.5 1.5 1.5 — — — — — — — Candelilla wax — — — — 3 — — 1.5 - 1.5 — — — — — — Water 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 Butylene glycol 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 (Li/Mg/Na) silicate 1 1 1 1 1 — — — — — 1 1 1 1 1 1 Total 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 Evaluation Roughness A A A A A A A A A A C C B B C D concealing Ease of A A A A A A A A A A B B D D D B application Stability A A A A A A A A A A A A C A B A

[0042] In Table 3, a composition (Example 12) was formulated by further blending a crosslinked siloxane elastomer and a spherical powder in addition to component (a) and component (b) of the present invention. With respect to the composition of Example 12, compositions (Examples 13 to 16) were formulated by changing the type of wax, and compositions (Examples 17 to 21) were formulated by changing the combination of multiple waxes that were blended. For each composition, there were sufficient roughness concealing effects, and the compositions were easy to apply and had excellent stability.

[0043] On the other hand, even if a crosslinked siloxane elastomer and a spherical powder were blended, sufficient roughness concealing effects were not able to be obtained with a composition (Comparative Example 4) not containing component (a) and a composition (Comparative Example 5) in which the blended amount of component (a) was less than 1% by mass. With a composition (Comparative Example 6) in which the blended amount of component (a) exceeded 15% by mass, the spreadability when applied was poor and the stability was also worse. Additionally, with a composition (Comparative Example 7) in which the blended amount of component (b) was less than 4% by mass, the spreadability was poor, and with a composition (Comparative Example 8) in which the blended amount of component (b) was more than 25% by mass, sufficient roughness concealing effects were not able to be obtained, and furthermore, the spreadability became poor. Additionally, sufficient roughness concealing effects were not able to be obtained even when raising the blended amount of zinc oxide, which has light scattering effects, instead of component (b) (Comparative Example 9).

2. Oil-Based Cosmetic

[0044] The oil-based cosmetic compositions indicated in Table 4 below were formulated. Specifically, the compositions were obtained by dispersing the powder in the oil-based components that were mixed by using a homomixer.

TABLE-US-00004 TABLE 4 Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. 22 23 24 25 26 27 28 29 Cyclomethicone 53 53 53 53 53 53 53 53 Diphenylsiloxyphenyl trimethicone 2 2 2 2 2 2 2 2 Trimethylsiloxy silicic acid 4 4 4 4 4 4 4 4 PEG-10 dimethicone 3 3 3 3 3 3 3 3 Talc 5 5 5 5 5 5 5 5 Zinc oxide 5 5 5 5 5 5 5 5 Dimethicone crosspolymer 12.5%/ 20 20 20 20 20 20 20 20 cyclopentasiloxane (Dimethicone/vinyl dimethicone) 5 5 5 5 5 5 5 5 crosspolymer (spherical powder) Rice bran wax 3 — — — — — — — Polyethylene wax — 3 — — — 1.5 — 1.5 Microcrystalline wax — — 3 — — 1.5 1.5 — Jojoba ester — — — 3 — — 1.5 1.5 Candelilla wax — — — — 3 — — — Total 100 100 100 100 100 100 100 100 Evaluation Roughness concealing A A A A A A A A Ease of application B B B B B B B B Stability A A A A A A A A

[0045] As indicated in Table 4, an oil-based cosmetic composition (Example 22) in which component (a) and component (b) of the present invention were blended was formulated. Furthermore, with respect to the composition of Example 22, compositions (Examples 23 to 26) were formulated by changing the type of wax, and compositions (Examples 27 to 29) were formulated by changing the combination of multiple waxes that were blended. Each of the oil-based compositions obtained sufficient roughness concealing effects and ease of application, and had excellent stability, though they were less easy to apply in comparison with the water-in-oil emulsion compositions.