JP6605343B2 - Emulsified cosmetics - Google Patents

Description

The present invention relates to an emulsified cosmetic that exhibits excellent skin adhesion after application.

Conventionally, emulsified cosmetics have a film formation for the purpose of imparting water repellency in order to keep useful ingredients and ingredients in the cosmetics, such as coloring materials, on the skin, and also to prevent makeup from collapsing due to rain, sweat, etc. Agents have been formulated.
However, it is considered that the film-forming agent is likely to soften the film due to the influence of oil or surfactant when blended into an emulsified cosmetic, especially when combined with a surfactant or oil. The film collapses due to bending stress or the twisting occurs, so that the makeup collapse occurs, which has adversely affected the aesthetics of the appearance.

In order to solve such problems, various studies have been made in the past. For example, a technique for forming a highly water-repellent film by using a salt of a higher fatty acid component containing a liquid higher fatty acid and controlling the pH within a specific range is disclosed (Patent Document 1). Including it has a drawback that the drying speed is slow, and bleeding and color transfer occur during coating. In addition, a technique for increasing the drying speed by blending a volatile oil agent to quickly form a strong film is disclosed (Patent Document 2), but the problem of high irritation to mucous membranes and high volatility This is not preferred because of the problem that moisture tends to evaporate from the surface of the living body and lead to drying. Moreover, although a film having high water repellency or a strong film is formed by the above-described technique, the cosmetic breakup cannot be solved sufficiently.

The (α-olefin / vinyl pyrrolidone) copolymer, the (styrene / vinyl pyrrolidone) copolymer, and the acrylic film forming agent are existing film forming agents. These are known to produce water repellency in a coating film by forming a film after drying, and are used in many cosmetics. However, it has water repellency and the ability to form a strong film, but has not yet been able to effectively solve the makeup break.
Di-fatty acid acyl glutamic acid lysine salt has amphiphilic properties and is an existing substance used in cosmetics. It is known that when incorporated in a cosmetic, the moisture retention is improved, and the pigment dispersibility and emulsion stabilization of the cosmetic are improved. In addition, a technique for improving water repellency and transfer inhibiting ability when used in combination with a dextrin-based resinous film forming agent is disclosed (Patent Document 3). However, there is no precedent for a technique that effectively solves the cosmetic break-up when used in combination with a film-forming agent.

JP2014-221723 JP2009-242257 JP-A-2015-174849

The present inventor has intensively studied on makeup breakup that cannot be solved even when water resistance is imparted or a strong film is formed. As a result, it was found that even if a highly water-resistant film or a strong film is formed, the film is peeled off from the skin during use, which is a cause of makeup collapse. That is, an object of the present invention is to bring a strong film having water resistance into close contact with the skin over time.

In order to achieve the above object, the present inventor has intensively studied,
Component (A) difatty acid acylglutamic acid lysine salt,
Component (B) (α-olefin / vinyl pyrrolidone) copolymer or (styrene / vinyl pyrrolidone) copolymer,
Component (C) acrylic acid film forming agent,
By combining the two, it was discovered that the cosmetic film is more resistant to disintegration by improving the adhesion of the film to the skin and making it difficult to peel off, while having water repellency and high film strength, and the present invention has been completed. .

That is, the present invention
Next component (A) (B) (C)
(A) Difatty acid acylglutamic acid lysine salt (B) (α-olefin / vinylpyrrolidone) copolymer or (styrene / vinylpyrrolidone) copolymer (C) An emulsified cosmetic containing an acrylic acid film-forming agent is provided. .

INDUSTRIAL APPLICABILITY The present invention can provide an emulsified cosmetic that is excellent in skin adhesiveness of a cosmetic film after application and does not collapse.

  Hereinafter, the present invention will be described in more detail.

  The component (A) used in the present invention is a known component that has amphiphilic properties and is used in cosmetics. In this invention, the effect which suppresses peeling of a decorative film was shown at the time of combined use with the component B and the component C. Some difatty acid acylglutamic acid lysine salts are already commercially available, and such commercially available products can also be used in the present invention. Among such commercially available products, specifically, Pericea L-30 manufactured by Asahi Kasei Chemicals Corporation may be mentioned as dilauroyl glutamate lysine Na. In the present invention, it was found that when the component (A) was blended, the adhesion of the film, which cannot be solved only by the component (B) and the component (C), was improved, and the makeup collapse was improved.

  Although the compounding quantity of the component (A) used for this invention is not specifically limited, Preferably it is 0.03-1 mass%, More preferably, it is compounding in 0.05-0.5 mass%. If it is blended in this range, the makeup feeling is very good.

  Component (B) used in the present invention is a copolymer synthesized from an α-olefin having 8 to 36 carbon atoms or styrene and vinylpyrrolidone. In the present invention, it is used for the purpose of forming a cosmetic film. Preferably, the copolymer sold by ISP Japan as Antaron V-220 (eicosene / vinyl pyrrolidone), the company sold by Antaron V-216 (vinyl pyrrolidone / hexadecene), and the company sold by Antara 430 (styrene) / Vinyl pyrrolidone) copolymer, and one or more selected from the group consisting of tricontanyl polyvinyl pyrrolidone sold as Antaron WP-660 from the same company.

  Although the compounding quantity of the component (B) used for this invention is not specifically limited, Preferably it is 0.2-5 mass%, It is preferable to mix | blend in the range of 0.5-3 mass% more preferably.

The component (C) used in the present invention is a polymer having the ability to form a water-repellent film, and also has a role in assisting the formation of the film and the film formation of the component (B) in the present invention. For example, the copolymer which uses at least 1 sort (s) in acrylic acid or methacrylic acid as a monomer is mentioned. The polymer can contain one or more monomers other than acrylic acid or methacrylic acid as long as it has a film-forming ability, and the type of monomer other than acrylic acid or methacrylic acid is not particularly limited. Particularly preferably, alkyl acrylate (the alkyl part has 1 to 4 or 8 carbon atoms), alkyl methacrylate (the alkyl part has 1 to 4 or 8 carbon atoms), acrylic acid or methacrylic acid. And a copolymer composed of two or more monomers. Component (C) was not able to obtain sufficient skin adhesion only by the combined use with component (B), but it was found that very good skin adhesion was obtained by additionally using component (A).

Although the compounding quantity of the component (C) used for this invention is not specifically limited, Preferably it is 0.2-10 mass%, It is preferable to mix | blend in 0.5-5 mass% more preferably.

In addition to the essential components described above, the emulsified cosmetic of the present invention can be blended with components generally used in cosmetics and the like as necessary. In addition, what is described as 1,3-BG in this specification means 1,3-butylene glycol.

For the emulsified cosmetic of the present invention, the viscosity was measured using a B-type viscometer: VISCOMETER TVB-10M (manufactured by Tokimec Co., Ltd., measurement conditions: changing the rotor, the number of rotations, and the measurement time according to the viscosity). The rotor measured the value of the measurement time of 60 seconds with the rotation speed of 6-30 rpm suitably using M2, M3, and M4 according to the viscosity range of the sample.

The present invention will be further described with reference to the following examples. However, these examples do not limit the present invention. In Tables 1 and 2, the blending amounts are displayed so that the total amount of the oil-in-water emulsified cosmetic is 100%. The numerical values of the amounts are all mass%.

The effect was measured by the following evaluation method.
[Stability evaluation method]
Each sample was filled in a container, allowed to stand at 40 ° C. for 1 month, and then checked visually or with an optical microscope.

[Stability evaluation criteria]
A: Very good (no separation)
○: Good (produces fine droplets that are difficult to distinguish visually)
Δ: Slightly bad (slight separation occurs)
×: bad (separation occurs, there is a problem as a preparation)

[Adhesion evaluation method for coated surface]
The emulsified cosmetic according to the present invention has a coating adhesion performance that cannot be solved only by forming a water-repellent coating. In order to confirm the adhesion performance of the film, 0.1 g of the prepared cosmetic was applied on a quartz plate, dried and then immersed in water, and the time until the film was peeled off was confirmed.

[Evaluation criteria for adhesion to coating surface]
◎: 5 minutes or more ○: 1 minute to 5 minutes Δ: 30 seconds to 1 minute ×: 30 seconds or less

[Water repellency evaluation method]
In order to compare with the adhesion performance of the emulsified cosmetic, water repellency was evaluated. 0.1 g was applied on a quartz plate, and after drying, 100 μL of water was dropped to confirm the diameter of the spread water.

[Water repellency evaluation criteria]
◎: 1 cm or less ○: 1 cm to 1.2 cm
Δ: 1.2 cm to 1.5 cm
×: 1.5 cm or more

The table of evaluation results is shown below.

The emulsified cosmetics of Examples 1 to 15 and Comparative Examples 1 to 9 having the compositions shown in Tables 1 and 2 were prepared by a conventional method.

As is clear from the examples, all of the emulsified cosmetics using the components of the present invention have a film that is significantly retained, and the adhesion performance to the coated surface is very high.

The comparative example not containing any of the component (A), the component (B), and the component (C) did not satisfy the adhesion performance of the film.

In particular, Comparative Example 1, Comparative Example 4 and Comparative Example 5 are examples in which the adhesion performance of the film is very poor even though the water repellency is high. From this result, it is understood that the adhesion performance of the cosmetic film, which was insufficient only by selectively blending the water-repellent film forming agent in the formulation, is improved by the configuration of the present invention.

The emulsified cosmetic of the present invention can be mainly made into an emulsion or cream as a dosage form, and can also be used as a spray type.

<Prescription example>
The composition of each prescription was produced by the conventional method. In any formulation example, it was confirmed that the film had good film adhesion performance.

<Sunscreen emulsion>
Ingredient name Compounding amount (%)
Water Residual ethanol 10
1,3-BG 5
Glycerin 5
Ethyl hexyl methoxycinnamate 7
Bisethylhexyloxyphenol methoxyphenyl triazine 2
Octocrylene 2
Cyclopentasiloxane 2
Cetyl ethylhexanoate 2
Silica 2
Cetyl phosphate K 0.5
Dilauroylglutamate lysine Na 0.1
(Vinylpyrrolidone / Eicosene) Copolymer 1.5
Alkyl acrylate copolymer 1.5
Carbomer 0.25
Chelating agent appropriate amount ethyl paraben appropriate amount perfume appropriate amount total 100

<Cream>
Ingredient name Compounding amount (%)
Water remaining 1,3-BG 7
Sorbitol 2
Dimethicone 2
Hydrogenated polyisobutene 5
Cetyl ethylhexanoate 5
Cetanol 1
Beeswax 1
Cetyl phosphate K 1
Dilauroyl glutamate lysine Na 0.3
(Vinylpyrrolidone / Eicosene) Copolymer 1
Alkyl acrylate copolymer 2
Xanthan gum 0.05
Carbomer 0.3
Chelating agent appropriate amount phenoxyethanol appropriate amount perfume appropriate amount total 100

<Cream>
Ingredient name Compounding amount (%)
Water remaining 1,3-BG 5
Sorbitol 2
Dimethicone 2
Hydrogenated polyisobutene 5
Cetyl ethylhexanoate 5
Cetanol 1
Beeswax 1
Cetyl phosphate K 1
Dilauroyl glutamate lysine Na 0.3
(Vinylpyrrolidone / Eicosene) Copolymer 1
Alkyl acrylate copolymer 0.5
(Alkyl acrylate / VA) copolymer 0.5
Xanthan gum 0.05
Carbomer 0.3
Chelating agent appropriate amount phenoxyethanol appropriate amount perfume appropriate amount total 100

Claims (1)

Component (A): Difatty acid acyl glutamic acid lysine salt Component (B): (α-olefin / vinyl pyrrolidone) copolymer or (styrene / vinyl pyrrolidone) copolymer component (C): emulsification containing an alkyl acrylate copolymer having water repellency Cosmetics.