JP6026237B2 - Solid powder cosmetic - Google Patents

Description

The present invention relates to a solid powder cosmetic produced by a wet molding method. More specifically, by blending the following components (a) to (d), even when only water is used as a volatile solvent , no cracks or outer peripheral gaps are generated on the surface, and the feeling of use and impact resistance are excellent. Relates to solid powder cosmetics.
(A) Cellulose-based water-soluble polymer (b) HLB 8 or less surfactant (c) Powder (d) Oil agent

  Solid powder cosmetics are supported by many customers for their advantages such as portability and simplicity of makeup methods. The solid powder cosmetic molding method includes a dry molding method in which a powder composition containing a powder and an oil agent is compression molded, and a powder composition containing a powder and an oil agent and a volatile solvent mixed to form a slurry. A wet molding method is generally used in which a container is filled and the volatile solvent is removed for molding. The wet molding method can obtain a good molded product even when it contains a large amount of powder having elasticity and flaky powder having a high aspect ratio, such as a pearl agent, as compared with the dry molding method. In addition, since the oil component efficiently adheres to each of the powder components, there is no powderiness, and a molded product with a very smooth and moist feel can be obtained.

  Conventionally, volatile oils such as low-boiling hydrocarbons and volatile silicone oils have been used as solvents used in the wet molding method. However, since all of these volatile oils are organic solvents having a low flash point, it is essential to take an explosion-proof measure and a safety measure by inhaling workers, and it is also necessary to recover the solvent due to environmental problems. Therefore, a wet molding method using water as a solvent has been demanded. However, when water is used as a solvent, there is a problem that compared to a volatile oil agent, cracks and outer clearances are likely to occur on the surface when removing the solvent, and voids are likely to be generated inside, resulting in poor impact resistance. . Therefore, in order to solve this problem, a method of blending a hydrophobized powder with a polyhydric alcohol, a water hydrating agent, a specific activator (Patent Document 1), a hydrophobized powder with a polyhydric alcohol, a specific Silicone gel composition, method of blending specific activator (Patent Document 2), method of blending hydrophobized powder and polyhydric alcohol, specific flexible organic resin powder, specific activator (Patent Document 3), A method of blending a powder having a bond moldability with a specific composite powder and hydrocarbon oil (Patent Document 4), a method of blending fumed silicic anhydride with starch, and a water-swellable clay mineral (Patent Document 5). Are known.

JP 2011-74023 A JP 2010-37207 A JP 2010-47528 A Japanese Patent No. 4594075 Japanese Patent No. 4769007

  However, none of the solid powder cosmetics obtained by the wet molding method is sufficient in terms of impact resistance, and solid powder cosmetics that are still satisfactory in terms of both impact resistance and a smooth feeling of use are still present. The current situation is that it was not obtained.

As a result of intensive studies to solve the above-mentioned problems, the inventors of the present application blended the following components (a) to (d), so that no cracks or gaps in the outer periphery are formed on the surface, and impact resistance is achieved. It has been found that a smooth feeling of use only by the wet molding method can be obtained, and the present invention has been completed. That is, this invention mixes the powder composition containing the following component (a)-(d) with only water as a volatile solvent, and makes a slurry form, after filling this with a container, water is removed. The obtained solid powder cosmetic is provided.
(A) Cellulose-based water-soluble polymer (b) HLB 8 or less surfactant (c) Powder (d) Oil agent

  Even when water is used as a solvent, the solid powder cosmetic of the present invention is free from cracks and gaps on the outer periphery, has excellent impact resistance, and has a smooth feeling of use unique to a wet molding method.

  Hereinafter, preferred embodiments of the present invention will be described. The cellulose-based water-soluble polymer (a) used in the present invention is not particularly limited as long as it is usually used in cosmetics. The cellulose-based water-soluble polymer referred to here is a water-insoluble cellulose that is made water-insoluble by modifying the hydroxyl group of cellulose with alkylene oxide or the like. Specifically, one or more selected from methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxyethylmethylcellulose and the like can be blended. Of these, hydroxypropylcellulose and hydroxypropylmethylcellulose are particularly preferred.

  Although the compounding quantity of said cellulose water-soluble polymer is not specifically limited, 0.01-3 mass% is preferable. More preferably, it is 0.05-1 mass%. If it is less than 0.01% by mass, the impact resistance may not be sufficient, and if it exceeds 3% by mass, the obtained wet molded product is too hard, and a smooth feeling of use only by the wet molding method is obtained. There may not be.

The surfactant having an HLB of 8 or less (b) used in the present invention can be arbitrarily selected as long as the HLB value based on the Griffin method is 8 or less. Among them, sorbitan monoisostearate, sorbitan diisostearate, sorbitan triisostearate, sorbitan sesquiisostearate, sorbitan monooleate, sorbitan dioleate, sorbitan trioleate, sorbitan sesquioleate, diglyceryl monoisostearate, diisostearic acid It is preferable to combine one or more selected from diglyceryl, diglyceryl triisostearate, PEG-5 hydrogenated castor oil, PEG-10 hydrogenated castor oil, and polyether-modified silicone. Of these, sorbitan monoisostearate, sorbitan diisostearate, sorbitan triisostearate, and sorbitan sesquiisostearate are particularly preferable. A surfactant having an HLB value exceeding 8 is liable to cause cracks or gaps in the outer periphery when water is removed, and the impact resistance is not sufficient.

  Although the compounding quantity of said surfactant below HLB8 is not specifically limited, 0.01-5 mass% is preferable. More preferably, it is 0.1-3 mass%. If it is less than 0.01% by mass, the dispersibility when the powder composition containing powder as a main component is mixed with water to form a slurry may not be sufficient, resulting in poor impact resistance and smooth use feeling. There is a case. If it exceeds 5% by mass, the feeling of use may become sticky or the makeup sustainability may deteriorate.

The powder of (c) used for this invention will not be specifically limited if it is a powder normally used for cosmetics. For example, talc, sericite, mica, synthetic mica, silica, barium sulfate, alumina, boron nitride, titanium oxide, iron oxide, zinc oxide and other inorganic powders, nylon, polyurethane, polyethylene, polystyrene, polymethyl methacrylate, silicone powder And organic powders. Moreover, what hydrophobized these, such as a silicone process, a fatty-acid process, and a fluorine process, can also be used. Although the compounding quantity of said powder is not specifically limited, 75-98 mass% is preferable with respect to solid powder cosmetics.

The oil agent of (d) used for this invention will not be specifically limited if it is an oil agent normally used for cosmetics. For example, hydrocarbons, oils and fats, waxes, hardened oils, ester oils, higher alcohols, regardless of the origin of animal oils, vegetable oils, synthetic oils, etc. And oils such as silicone oils, fluorine-based oils, and lanolin derivatives. Although the compounding quantity of the said oil agent is not specifically limited, 1-20 mass% is preferable with respect to solid powder cosmetics.

  In addition to the above components, the solid powder cosmetic of the present invention may contain other components commonly used in cosmetics. Specific examples include medicinal ingredients, refreshing agents, ultraviolet absorbers, stabilizers, antioxidants, preservatives, pH adjusters, viscosity adjusters, wetting agents and the like.

The solid powder cosmetic of the present invention is prepared by mixing a powder composition containing the following components (a) to (d) with only water as a volatile solvent to form a slurry, and then filling the slurry into a container. It is obtained by removing water.
(A) Cellulose-based water-soluble polymer (b) HLB 8 or less surfactant (c) Powder (d) Oil agent

In this invention, the compounding quantity of water is not specifically limited, However 30-150 mass% is preferable with respect to a powder composition.

  Examples of the solid powder cosmetic of the present invention include foundation, pressed powder, eye shadow, eyebrow, cheek color and the like.

Next, the present invention will be described in more detail with reference to examples. The present invention is not limited thereby.
Examples 1 to 4 and Comparative Examples 1 to 6: Powder Foundation Powder foundations were prepared according to the formulation shown in Table 1 below and the following production method, and evaluated according to the evaluation methods and criteria shown below. Indicated.

(Manufacturing method)
A cosmetic powder, an oil agent, an antioxidant and the like are uniformly mixed to obtain a powder cosmetic. To this, 75% by mass of purified water is added to the powder cosmetic and mixed uniformly to form a slurry. This is filled into a container and compression-molded while vacuuming. Thereafter, the molded product was dried at 70 ° C. for 10 hours to obtain a powder foundation.

(Evaluation Method 1: Appearance)
For each of the five powder foundations of the above Examples and Comparative Examples, the appearance was visually observed to evaluate whether there were cracks or gaps on the outer surface, and the determination was made according to the following criteria.
<Criteria>
○: No cracks or gaps on the outer periphery of all 5 sheets, good appearance ×: Cracks or gaps on the outer periphery are present in one or more sheets

(Evaluation Method 2: Impact resistance)
About each of the five powder foundations of the said Example and a comparative example, it was dropped horizontally on the vinyl chloride board from the height of 50 cm. This was repeated until cracks and cracks occurred, and the number of drops until cracks and cracks occurred was averaged for 5 sheets, and judged according to the following criteria.
<Criteria>
◎: 4 times or more ○: 2.5 or more and less than 4 times Δ: 1.5 or more and less than 2.5 times ×: less than 1.5 times

(Evaluation method 3; feeling of use)
5 professional panelists in their 20s and 40s use the powder foundations of the above examples and comparative examples, and give a score based on the following evaluation criteria for the feeling of use, and give the average score of each powder foundation. It was calculated and determined according to the following criteria.
<Evaluation criteria>
[Use feeling] [score]
Very good: 5
Good: 4
Normal: 3
Somewhat bad ： 2
Bad: 1
<Criteria>
[Average score] [Judgment]
4.5 or more ◎
3.5 to less than 4.5 ○
2 to less than 3.5
Less than 2 ×

  Examples 1-4 were good in appearance, impact resistance, and usability. On the other hand, Comparative Example 1 in which a cellulose-based water-soluble polymer and a surfactant having an HLB of 8 or less were not blended was poor in appearance, impact resistance, and usability. Further, Comparative Example 2 in which a surfactant having an HLB of 8 or less is not blended has a poor appearance and feeling in use, and Comparative Example 3 in which no cellulose-based water-soluble polymer is blended has poor impact resistance. It was. In Comparative Examples 4 and 5 containing a water-soluble polymer other than cellulose, the appearance was cracked and the feeling of use was also poor. In Comparative Example 6 in which a surfactant having an HLB of greater than 8 was blended, the appearance, impact resistance and usability were not sufficient. From this, the necessity of blending a cellulose-based water-soluble polymer and a surfactant having an HLB of 8 or less was clarified.

Examples 5 to 10: Powder foundation A powder foundation was prepared in the same manner as in Examples 1 to 4 according to the formulation shown in Table 2 below, and evaluated according to the same evaluation method and criteria as in Examples 1 to 4, and the results were The results are also shown in Table 2.

  Examples 6 to 9 were good in appearance, impact resistance, and usability. In contrast, Example 5 was slightly inferior in impact resistance, and Example 10 was slightly inferior to the cosmetic puff and slightly inferior in terms of smooth use feeling. From this result, it became clear that the blending amount of the cellulose-based water-soluble polymer is preferably 0.01 to 3% by mass, and more preferably 0.05 to 1% by mass.

Examples 11 to 16: Powder foundation A powder foundation was prepared in the same manner as in Examples 1 to 4 according to the formulation shown in Table 3 below, and evaluated by the same evaluation method and criteria as in Examples 1 to 4, and the results were evaluated. The results are also shown in Table 3.

Examples 12 to 15 were good in appearance, impact resistance, and usability. On the other hand, Example 11 felt a little rough in terms of usability, and was slightly inferior in impact resistance. Example 16 felt a little sticky in terms of usability.
From this result, it became clear that the blending amount of the surfactant having an HLB of 8 or less is preferably 0.01 to 5% by mass, more preferably 0.1 to 3% by mass.

Example 17
Presto powder formula Ingredients Amount (% by mass)
(1) Talc 55.00
(2) Sericite remaining amount (3) Synthetic mica 15.00
(4) Yellow iron oxide 0.20
(5) Bengala 0.25
(6) Black iron oxide 0.05
(7) Polymethyl methacrylate 5.00
(8) Hydroxypropyl cellulose (Note 1) 0.10
(9) Preservative 0.50
(10) Diethylhexyl succinate 4.00
(11) Diisostearyl malate 1.00
(12) Sorbitan sesquiisostearate (Note 6) 1.00
(13) Antioxidant appropriate amount (14) Perfume appropriate amount
Total 100.00
(Manufacturing method)
A pressed powder was obtained by a wet molding method in the same manner as in Example 1.

Example 18
Eye shadow prescription Ingredients Amount (% by mass)
(1) Talc 15.00
(2) Sericite remaining amount (3) Mica 20.00
(4) Cellulose water-soluble polymer (Note 9) 0.20
(5) Silica 1.00
(6) Red No. 226 0.30
(7) Gunjo 1.00
(8) Mica titanium 10.00
(9) Preservative 0.50
(10) Dimethicone 5.00
(11) Squalane 6.00
(12) Vaseline 1.00
(13) Sorbitan sesquiisostearate (Note 6) 1.00
(14) Antioxidant proper amount (15) Perfume proper amount
Total 100.00
Note 9: Metroz 65SH 4000 (manufactured by Shin-Etsu Chemical Co., Ltd.)
(Manufacturing method)
An eye shadow was obtained by a wet molding method in the same manner as in Example 1.

Example 19
Teak color Ingredient Amount (% by mass)
(1) Talc 20.00
(2) Sericite Remaining (3) Mica 10.00
(4) Cellulose water-soluble polymer (Note 9) 0.05
(5) Silica 1.50
(6) Red No. 226 0.30
(7) Yellow No. 5 0.35
(8) Bengala 0.80
(9) Bengala-coated mica titanium 5.00
(10) Polymethyl methacrylate 5.00
(11) Preservative 0.20
(12) Diphenylsiloxyphenyl trimethicone 5.00
(13) Isocetyl isostearate 6.00
(14) Sorbitan sesquiisostearate (Note 6) 2.00
(15) Antioxidant proper amount (16) Fragrance proper amount
Total 100.00
(Manufacturing method)
A cheek color was obtained by a wet molding method in the same manner as in Example 1.

Examples 17 to 19 were all cosmetics having good appearance, impact resistance, and usability.

  The solid powder cosmetic according to the present invention is superior in impact resistance and does not produce cracks or gaps on the outer periphery by blending a cellulose-based water-soluble polymer and a surfactant having an HLB of 8 or less. It can have a smooth use feeling.

Claims (5)

A solid powder cosmetic obtained by mixing a powder composition containing the following components (a) to (d) with only water as a volatile solvent to form a slurry, filling this into a container, and then removing the water. .
(A) Cellulose-based water-soluble polymer (b) HLB 8 or less surfactant (c) Powder (d) Oil agent The solid powder cosmetic according to claim 1, wherein the blending amount of the cellulose-based water-soluble polymer is 0.01 to 3 mass% with respect to the total amount of the powder composition. 2. The solid powder cosmetic according to claim 1, wherein the blending amount of the cellulose-based water-soluble polymer is 0.05 to 1% by mass with respect to the total amount of the powder composition. The solid powder cosmetic according to any one of claims 1 to 3, wherein the amount of the surfactant having an HLB of 8 or less is 0.01 to 5% by mass relative to the total amount of the powder composition. The solid powder cosmetic according to any one of claims 1 to 3, wherein the amount of the surfactant having an HLB of 8 or less is 0.1 to 3% by mass relative to the total amount of the powder composition.