JP4938331B2 - Emulsified cosmetic - Google Patents

Description

  The present invention relates to an emulsified cosmetic containing ethyl oleate and a non-polar oil. More specifically, it moisturizes the skin and prevents drying of the skin not only immediately after use but also after 12 hours of use, The present invention relates to an emulsified cosmetic that is excellent in cosmetic effects such as making fine lines less noticeable, has good familiarity with the skin, and is excellent in use feeling such as no stickiness.

  For women, skin problems are inexhaustible, such as spots and freckles due to sunburn, fine lines due to aging, and lack of moisture. Above all, dry skin and fine lines caused by lack of moisture of the skin are serious because they may be seen older than the actual age, and cosmetics that give moisture are desired. Further, it is considered that a general woman uses cosmetics twice in the morning and at night, and at least the cosmetic effect is preferably maintained for 12 hours. And as a conventional technique to moisturize the skin, water is supplemented with water-soluble glycols such as glycerin to produce a moisturizing effect, or a non-polar oil agent is added to enhance the moisture retention ability of the skin A method is mentioned (for example, nonpatent literatures 1 and 2).

New Cosmetics Science 2nd edition (issued in 2001, Nanzan-do) p152-156 New Cosmetics Science 2nd edition (issued in 2001, Nanzan-do) p140-142

However, the moisturizing effect of the water-soluble glycols is a difficult method to improve the moisture immediately after use, but to dry and dry the skin over time and make fine lines less noticeable. In addition, although nonpolar oils have an emollient effect, they are unfit for use because they are unfit for the skin and cause stickiness.
Therefore, not only immediately after use but also after 12 hours of use, it has excellent cosmetic effects such as preventing dry skin and making fine lines less noticeable, and it is well-familiar with the skin and also has a good feeling of use such as no stickiness. Development of was desired.

  Under such circumstances, the present inventor has conducted extensive research to solve the above problems, and as a result, the emulsified cosmetic containing ethyl oleate and a non-polar oil is not only immediately after use but also after 12 hours of use. It has been found that it has excellent cosmetic effects such as preventing dryness and making fine wrinkles less noticeable, is well-familiar to the skin, and is excellent in feeling of use such as no stickiness.

That is, the present invention provides the following components (A) to (D);
(A) Ethyl oleate (B) Nonpolar oil agent (C) Surfactant (D) An emulsified cosmetic comprising water is provided. Still further, the present invention provides the above-mentioned emulsified cosmetic, which contains the component (E) jojoba alcohol.

  The emulsified cosmetic of the present invention is excellent in cosmetic effects such as prevention of drying of the skin not only immediately after use but also after 12 hours of use and making fine lines less noticeable by blending ethyl oleate and a nonpolar oil. The skin feels good on the skin and is not sticky.

Hereinafter, the present invention will be described in detail.
INDUSTRIAL APPLICABILITY In the emulsified cosmetic emulsifying an oil agent and water, the present invention can provide excellent effects on use feeling such as good familiarity to the skin and no stickiness.

The component (A) ethyl oleate used in the emulsified cosmetic of the present invention has high skin permeability, activates cells of the stratum corneum, and further dissolves with the nonpolar oil of component (B). Thus, the nonpolar oil agent of component (B) is used to improve the familiarity of the skin, synergistically soften the inside of the skin, and improve the effect of making fine lines inconspicuous.
Ethyl oleate is an ester of oleic acid and ethanol obtained by separating and purifying mixed fatty acids and is not particularly limited as long as it is used in cosmetics, but at the time of esterification, linoleic acid other than oleic acid is used. If a large amount of impurities such as linolenic acid is included, it will cause a foul odor over time, so it is better to use one with a high pure content of oleic acid at the time of esterification. It is preferably 80% by mass (hereinafter, simply referred to as “%”) or more, and optimally, the pure oleic acid content is 99% or more. As a commercially available product, ethyl oleate (manufactured by Shinei Chemical Co., Ltd.), NOFABLE EO-85S (manufactured by Nippon Oil & Fats Co., Ltd.), KAK EOV (manufactured by Higher Alcohol Industry Co., Ltd.), NIKKOL EOO (manufactured by Nikko Chemicals Co., Ltd.) and the like, and NOFABLE EO-99 (manufactured by NOF Corporation) and the like are exemplified as ethyl oleate having a pure oleic acid content of 99% or more.

  The blending amount of the component (A) in the emulsified cosmetic of the present invention is not particularly limited, but is preferably 0.01 to 5% in the cosmetic from the viewpoint of safety to the skin, and the component (B) nonpolar oil agent 0.1 to 1% is more preferable in order to improve the compatibility with and to improve the feeling of use such as good fit to the skin and no stickiness.

The nonpolar oil agent of the component (B) used in the emulsified cosmetic of the present invention has a high emollient effect and is used for preventing skin drying for a long time. Nonpolar oils are non-polar oils that are usually used in cosmetics, regardless of their origin, such as animal oil, vegetable oil, synthetic oil, and solid oil, semisolid oil, liquid oil, etc. And oil agents such as silicone oils. Specific examples include hydrocarbons such as liquid paraffin, squalane, petrolatum, polyisobutylene, polybutene, paraffin wax, ceresin wax, microcrystalline wax, and Fischer-Trops wax; One or more of these can be used. Among these, liquid liquid paraffin, squalane, semi-solid petrolatum, and polybutene are particularly preferable because of high compatibility with the component (A) ethyl oleate.
The blending amount of the component (B) in the emulsified cosmetic of the present invention is determined depending on the purpose, but is particularly preferably in the range of 0.1 to 50% because there is little stickiness and a high effect of preventing skin drying for a long time. .

The component (C) surfactant used in the emulsified cosmetic of the present invention is for emulsifying the component (A) ethyl oleate and the component (B) nonpolar oil agent and the component (D) water. Any surfactant can be used as long as it is a commonly used surfactant, such as a nonionic surfactant, an anionic surfactant, a cationic surfactant, an amphoteric surfactant, etc. Is mentioned.
Examples of nonionic surfactants include glycerin fatty acid esters and alkylene glycol adducts thereof, polyglycerin fatty acid esters and alkylene glycol adducts thereof, propylene glycol fatty acid esters and alkylene glycol adducts thereof, sorbitan fatty acid esters and alkylene glycols thereof. Adduct, fatty acid ester of sorbitol and its alkylene glycol adduct, polyalkylene glycol fatty acid ester, sucrose fatty acid ester, polyoxyalkylene alkyl ether, glycerin alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene hydrogenated castor oil, lanolin Alkylene glycol adduct, polyoxyalkylene alkyl co-modified silicone, polyether-modified silicone Etc. The.
Examples of anionic surfactants include inorganic and organic salts of fatty acids such as stearic acid and lauric acid, alkylbenzene sulfates, alkyl sulfonates, α-olefin sulfonates, dialkyl sulfosuccinates, α-sulfonates. Fatty acid salt, acylmethyl taurine salt, N-methyl-N-alkyl taurine salt, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl phenyl ether sulfate, alkyl phosphate, polyoxyethylene alkyl ether phosphate, polyoxyethylene Examples thereof include alkyl phenyl ether phosphates, N-acyl amino acid salts, N-acyl-N-alkyl amino acid salts, o-alkyl substituted malates, alkyl sulfosuccinates and the like.
Examples of the cationic surfactant include alkylamine salts, polyamines and alkanolamine fatty acid derivatives, alkyl quaternary ammonium salts, and cyclic quaternary ammonium salts.
Examples of amphoteric surfactants include amino acid type and betaine type carboxylic acid types, sulfate ester types, sulfonic acid types, and phosphate ester types, and those that are safe for the human body can be used. For example, N, N-dimethyl-N-alkyl-N-carboxylmethylammonium betaine, N, N-dialkylaminoalkylene carboxylic acid, N, N, N-trialkyl-N-sulfoalkylene ammonium betaine, N, N- Examples include dialkyl-N, N-bis (polyoxyethylene sulfate) ammonium betaine, 2-alkyl-1-hydroxyethyl-1-carboxymethylimidazolinium betaine, and hydrogenated phospholipid. One or more of these can be used.

  Among these components (C), hydrogenated phospholipids are particularly preferable because they are highly safe, have a good fit on the skin, and have a good feeling of use such as no stickiness.

  The blending amount of the component (C) in the emulsified cosmetic of the present invention is not particularly limited, but is preferably 0.1 to 10% in the cosmetic from the viewpoint of stability over time of the emulsion, and uses such as no stickiness. In order to make the feeling good, 1 to 5% is more preferable.

  The water of component (D) used in the emulsified cosmetic of the present invention is not particularly limited as long as it is used in cosmetics. For example, purified water, hot spring water, deep layer water, steam distilled water such as plants, etc. Is mentioned. Purified water such as ion-exchanged water or distilled water is particularly preferable because there are few impurities such as metal ions.

Furthermore, the jojoba alcohol of the component (E) used in the emulsified cosmetic of the present invention is blended with the component (A) ethyl oleate and the component (B) non-polar oil agent, to the skin. It is a component used to improve the familiarity with the skin and to prevent the skin from drying for a long time by synergistically increasing the permeability of the skin. Jojoba alcohol is an unsaturated higher alcohol obtained by reducing jojoba oil obtained from dried seeds of jojoba. As its essence, it contains about 90% of eicosenol having 20 carbon atoms and docosenol having 22 carbon atoms. For example, jojoba alcohol (manufactured by Koei Kogyo Co., Ltd.), NIKKOL jojoba alcohol (manufactured by Nikko Chemicals Co., Ltd.) or the like can be used as a commercial product.
The blending amount of the component (E) in the emulsified cosmetic of the present invention is not particularly limited, but is preferably 0.01 to 5% in the cosmetic from the viewpoint of safety to the skin, and the component (A) and the component ( In order to improve the compatibility with B) and to improve the usability such as good fit to the skin and no stickiness, 0.1 to 1% is more preferable.

  In the emulsified cosmetic of the present invention, an aqueous component can be blended in addition to the component (D) water blended as an essential component. The aqueous component is not particularly limited as long as it is a component that dissolves in water or has an affinity for use in cosmetics. For example, liquid polyhydric alcohols such as propylene glycol, 1,3-butylene glycol, and dipropylene glycol Glycerols such as glycerin, diglycerin and polyglycerin; alcohols such as ethyl alcohol and isopropyl alcohol; carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, carrageenan, agar, xanthan gum, gellan gum, carob gum, gelatin, locust bean gum, carboxy Water-soluble polymers such as methylcellulose, hydroxyethylcellulose, hydroxypropylmethylcellulose, pectin; sorbitol, erythritol, maltose, maltitol, trehalose, i Cytol, glucose, xylitol, sucrose and derivatives thereof, dextrin and derivatives thereof, saccharides such as honey and derivatives thereof; mucopolysaccharides such as hyaluronic acid and chondroitin sulfate; amino acids and derivatives thereof; sodium chloride, magnesium chloride, sodium lactate Electrolytes such as polyethylene glycol, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside and the like.

  In the emulsified cosmetic of the present invention, in addition to the above components, depending on the purpose, in a quantitative and qualitative range, powder, oil, moisturizer, ultraviolet absorber, antioxidant, Ingredients commonly used in cosmetics such as preservatives, fragrances, and beauty ingredients can be blended.

  As the dosage form of the emulsified cosmetic of the present invention, it can be applied to any emulsion type such as oil-in-water type and water-in-oil type, and the form can be any of liquid, low-viscosity emulsion and cream. . In addition, as the emulsified cosmetic of the present invention, cosmetics that are directly applied to the skin such as skin lotion, cosmetic liquid, milky lotion, cream, sunscreen, foundation and the like are preferably exemplified.

  Hereinafter, the present invention will be described in more detail with reference to examples. Note that these do not limit the present invention.

Invention products 1 to 4 and comparative products 1 to 2: emulsion (oil-in-water emulsification type)
A milky lotion is prepared by the composition shown in Table 1 and the following production method, cosmetic effect; no dry skin immediately after use, no dry skin 12 hours after use, inconspicuous fine lines, and feeling of use; Table 1 shows the results of the evaluation of the following evaluation methods for good skin familiarity and no stickiness. Inventive products 1 to 3 are reference examples.

(Manufacturing method)
A. Ingredients 1-9 are heated to 75 ° C. and mixed uniformly.
B. Ingredients 10-13 are heated to 75 ° C. and mixed and dissolved uniformly.
C. Add A to B and emulsify.
D. C was cooled to obtain an emulsion (oil-in-water emulsion type).

(Evaluation methods)
A special panel of 20 people used and tested the emulsions of the present invention and comparative products. For each sample, “no skin dryness (immediately after use)”, “no skin dryness (use 12 After the time, ”each item of“ Small wrinkle conspicuousness ”,“ Good skin familiarity ”, and“ No stickiness ”was evaluated based on the following evaluation criteria. Furthermore, it judged with the following criteria from the average score of all the panels of the score. [Evaluation criteria]
(Evaluation): (Grade)
Very good: 6
Good: 5
Slightly good: 4
Normal: 3
Slightly bad: 2
Defect: 1
Very bad: 0
[Criteria]
(Average score): (Judgment)
5.5 points or more: ◎
4.5 points or more and less than 5.5 points: ○
2.5 or more and less than 4.5: △
Less than 2.5 points: ×

  As is apparent from the results in Table 1, the emulsions of the present invention products 1 to 4 are excellent not only immediately after use but also after 12 hours of use, with excellent cosmetic effects such as preventing skin drying and making fine lines less noticeable. It was excellent in the feeling of use, such as good familiarity with and no stickiness. On the other hand, Comparative Product 1 that does not contain ethyl oleate has poor skin familiarity and non-stickiness, and Comparative Product 2 that does not contain a non-polar oil does not dry out the skin after 12 hours of use, and wrinkles are noticeable. The difficulty was inferior.

Cream (water-in-oil emulsification type)
(Ingredient) (%)
1. Microcrystalline wax 1.5
2. Beeswax 1.5
3. Ethyl oleate (Note 5) 3
4). Jojoba alcohol (Note 6) 3
5. Squalane (Note 7) 35
6). Sorbitan sesquioleate 4
7). Polyoxyethylene (20 mol)
Sorbitan monooleate 1
8). Dipropylene glycol 10
9. Methyl paraoxybenzoate 0.1
10. Perfume proper amount11. Purified water remaining amount (Note 5): NOFABLE EO-85S (manufactured by NOF Corporation)
(Note 6): NIKKOL Jojoba Alcohol (Nikko Chemicals)
(Note 7): SQUALANE (manufactured by Kishimoto Special Liver Oil Industry)

(Production method)
A. Ingredients 1-6 are heated to 75 ° C. and mixed and dissolved uniformly.
B. Ingredients 7 to 9 and 11 are heated to 75 ° C. and uniformly mixed and dissolved.
C. Add B to A and emulsify.
D. C was cooled, and component 10 was added to obtain a cream (water-in-oil type).

  The cream of Example 2 is not only immediately after use, but also has excellent cosmetic effects such as preventing skin drying and making fine lines less noticeable even after 12 hours of use, and it feels good on the skin and has no stickiness. It was an excellent cream.

Whitening serum (oil-in-water emulsification type)
(Ingredient) (%)
1. Decaglyceryl pentastearate 0.5
2. Polyoxyethylene (10 mol) cholesteryl ether 0.2
3. Ethyl oleate (Note 2) 1.0
4). Jojoba alcohol (Note 3) 1.0
5. Hydrogenated soybean phospholipid (Note 8) 2.0
6). Polybutene (Note 9) 5.0
7). Dipropylene glycol 10.0
8). Arbutin 7.0
9. Ethylenediaminetetraacetic acid disodium salt 0.1
10. Succinic acid 0.1
11. Ethanol 5.0
12 Purified water remaining amount (Note 8): Resinol S-10 (Nikko Chemicals)
(Note 9): Polybutene 35R (made by Idemitsu Kosan Co., Ltd.)

(Production method)
A. Ingredients 1-7 are heated to 75 ° C. and mixed uniformly.
B. Ingredients 8 to 10 and 12 are heated to 75 ° C. and mixed and dissolved uniformly.
C. Add B to A and emulsify.
D. C was cooled and component 11 was added to obtain a whitening serum (oil-in-water emulsion type).

  The whitening essence of Example 3 is excellent not only immediately after use but also after 12 hours of use, with excellent cosmetic effects such as prevention of drying of the skin and making fine lines less noticeable, good familiarity with the skin, no stickiness, etc. It was a whitening serum with an excellent feeling of use.

Sunscreen (oil-in-water emulsification type)
(Ingredient) (%)
1. Decaglyceryl pentaoleate 1.5
2. Polyoxyethylene (10 mol) cholesteryl ether 1.0
3. Ethyl oleate (Note 2) 0.5
4). Jojoba alcohol (Note 6) 5.0
5. Hydrogenated soybean phospholipid (Note 1) 1.0
6). Dimethylpolysiloxane (Note 10) 5.0
7). 2-Ethylhexyl paramethoxycinnamate 8.0
8). Dipropylene glycol 10.0
9. Diethylenetriaminepentaacetic acid pentasodium salt 0.1
10. Malic acid 0.2
11. Ethanol 2.0
12 Perfume appropriate amount13. Methyl paraoxybenzoate 0.1
14 Purified water remaining amount (Note 10): Silicon KF-96 (6cs) (manufactured by Shin-Etsu Chemical Co., Ltd.)

(Production method)
A. Ingredients 1-7 are heated to 75 ° C. and mixed and dispersed uniformly.
B. Ingredients 8 to 10, 13, and 14 are heated to 75 ° C. and uniformly mixed and dissolved.
C. Add B to A and emulsify.
D. C was cooled, components 11 and 12 were added, and sunscreen (oil-in-water emulsion type) was obtained.

  The sunscreen of Example 4 is used not only immediately after use but also for a cosmetic effect such as prevention of skin dryness and making fine lines less noticeable even after 12 hours of use, good fit to the skin, no stickiness, etc. It was an excellent sunscreen.

Low viscosity emulsion foundation (oil-in-water emulsification type)
(Ingredient) (%)
1. Stearic acid 1.0
2. Cetanol 0.5
3. Polyoxyethylene (20 mol) hydrogenated castor oil 1.0
4). Ethyl oleate (Note 2) 1.0
5. Jojoba alcohol (Note 3) 1.0
6). Hydrogenated soybean phospholipid (Note 1) 0.5
7). Vaseline (Note 11) 5.0
8). 2-Ethylhexyl paramethoxycinnamate 0.1
9.1,3-butylene glycol 15.0
10. Titanium oxide 10.0
11. Bengala 0.2
12 Yellow iron oxide 0.2
13. Black iron oxide 0.1
14 Mica titanium 3.0
15. Carboxyvinyl polymer 0.2
16. Triethanolamine 0.7
17. Purified water remaining amount (Note 11): Pen white petrolatum (Penreco)

(Production method)
A. Ingredients 1-14 are heated to 75 ° C. and mixed and dispersed uniformly.
B. Ingredients 15 to 17 are heated to 75 ° C. and mixed and dissolved uniformly.
C. Add B to A and emulsify.
D. C was cooled to obtain an emulsion foundation (oil-in-water emulsion type).

  The emulsion foundation of Example 5 is excellent not only immediately after use but also after 12 hours of use, with excellent cosmetic effects such as prevention of skin dryness and making fine lines less noticeable, good familiarity to the skin, no stickiness, etc. It was a low-viscosity milky foundation with excellent usability and high makeup effect to hide skin spots and freckles.

Claims (4)

The following components (A) to (E) ;
(A) Ethyl oleate 0.01-5 mass%
(B) Non-polar oil agent 0.1-50 mass%
(C) 0.1 to 10% by mass of surfactant
(D) Water
(E) Jojoba alcohol 0.01-5 mass%
An emulsified cosmetic, characterized by comprising The emulsified cosmetic according to claim 1, wherein the component (C) is a hydrogenated phospholipid. The emulsified cosmetic according to claim 1 or 2, wherein the component (B) is a liquid paraffin, squalane, petrolatum or polybutene. The emulsified cosmetic according to any one of claims 1 to 3, which is an emulsified cosmetic for improving fine lines.