JP4495941B2 - Oil-in-water emulsified cosmetic - Google Patents

Description

  In the oil-in-water emulsified cosmetic containing phospholipid, nonionic surfactant, higher alcohol, oil, polyhydric alcohol and water, the present invention contains a specific amount of solid oil and / or paste oil as oil, The present invention relates to an oil-in-water emulsified cosmetic having a particle size of emulsified droplets of 1 μm or less. More specifically, it has a fresh feeling of use, excellent skin firmness and moisturizing effect, and stability over time. Is also related to an excellent oil-in-water emulsified cosmetic

  As human skin ages, the elasticity is partially lost and so-called sagging of the skin appears. A large number of cosmetics have been put on the market for those who have developed such symptoms to supplement the skin with moisture and raise the sagging of the skin. For such cosmetics, a method of blending a large amount of solid oil or paste oil (for example, see Patent Document 1) has been used. In addition, in oil-in-water emulsified cosmetics, the particle size of the emulsified droplets can be reduced by a method of using a phospholipid and a sucrose fatty acid ester as an emulsifier, a method of using an ionic surfactant and a specific aliphatic alcohol, etc. And a method for enhancing a fresh feeling of use is disclosed. (For example, see Patent Documents 2 and 3)

Japanese Examined Patent Publication No. 6-62382 (page 1 to page 9) JP-A-8-143420 (pages 1-6) JP 2001-157835 A (pages 1 to 7)

  However, in the method of blending a large amount of solid oil or paste oil, aggregation and coalescence of emulsified droplets, crystal precipitation, and the like have occurred, and it has been difficult to ensure stability over time. In addition, in the method of using phospholipid and sucrose fatty acid ester together as an emulsifier, or the method of using an ionic surfactant and a specific aliphatic alcohol together, solid oil or paste oil is used while maintaining fine emulsified droplets. It was difficult to emulsify a large amount.

  Therefore, development of an oil-in-water emulsified cosmetic with a fresh feeling of use, excellent skin firmness and moisturizing effect, and excellent stability over time has been desired.

  In view of such a situation, the present inventors have intensively studied. As a result, in an oil-in-water emulsion cosmetic containing a phospholipid, a nonionic surfactant, a higher alcohol, an oil, a polyhydric alcohol, and water, It has been found that an oil-in-water emulsified cosmetic containing a specific amount of paste oil and having a particle size of emulsified droplets of 1 μm or less solves the above problems, and has completed the present invention.

That is, the present invention comprises the following components (a) to (f);
(A) Phospholipid (b) Nonionic surfactant (c) Higher alcohol (d) Oil (e) Polyhydric alcohol (f) Water is contained, and content of component (d) is 1-30 mass% The solid content and / or paste oil is contained in the component (d) in an amount of 40% by mass or more, and the total content of the component (a) and the component (b) and the content ratio of the component (d) are The present invention provides an oil-in-water emulsified cosmetic having a mass ratio of 2: 1 to 1:10 and further having a particle size of emulsified droplets of 1 μm or less.

Moreover, content of the said component (d) is 3-25 mass%, and provides the oil-in-water type emulsion cosmetic characterized by the above-mentioned.

  The component (b) is one or more selected from polyoxyethylene cholesterol ether, polyoxyethylene cholestanol ether, polyoxyethylene phytosterol ether and polyoxyethylene phytostanol ether, the oil-in-water described above A type emulsified cosmetic is provided.

  Further, the present invention provides any of the oil-in-water emulsified cosmetics described above, wherein the cosmetic is a cosmetic exclusively for the eyes.

  The oil-in-water emulsified cosmetic of the present invention is an oil-in-water emulsified cosmetic with a fresh feeling of use, excellent skin firmness and moisturizing effect, and excellent stability over time.

  The component (a) phospholipid used in the present invention functions as an emulsifier in the oil-in-water emulsion cosmetic of the present invention, and any phospholipid used in normal cosmetics can be used. Can do. Specifically, soybean-derived phospholipid, soybean-derived hydrogenated phospholipid, soybean-derived lysophospholipid, soybean-derived hydrogenated lysophospholipid, egg yolk-derived phospholipid, egg yolk-derived hydrogenated phospholipid, egg yolk-derived lysophospholipid, egg yolk-derived hydrogenated Examples thereof include lysophospholipids, and one or more of them can be used.

  The content of the component (a) in the oil-in-water emulsion cosmetic of the present invention is preferably 0.1 to 10% by mass (hereinafter simply referred to as “%”), and more preferably 0.5 to 5%. When the content of the component (a) is within this range, an oil-in-water emulsified cosmetic with better emulsifying power and stability over time can be obtained.

  The component (b) nonionic surfactant used in the present invention functions as an emulsifier in the oil-in-water emulsion cosmetic of the present invention, and is a nonionic surfactant used in ordinary cosmetics. Any of them can be used. Specifically, polyoxyethylene cholesterol ether, polyoxyethylene cholestanol ether, polyoxyethylene phytosterol ether, polyoxyethylene phytostanol ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyglycerin fatty acid ester, Examples thereof include polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether, propylene glycol fatty acid ester, ethylene glycol fatty acid ester, and the like, and these can be used alone or in combination. Among these, as component (b), when one or more selected from polyoxyethylene cholesterol ether, polyoxyethylene cholestanol ether, polyoxyethylene phytosterol ether and polyoxyethylene phytostanol ether is selected, finer An oil-in-water emulsified cosmetic that is easy to obtain emulsified droplets and has particularly good temporal stability can be obtained. Moreover, the polyoxyethylene chain of these nonionic surfactants is preferably 5 to 60 mol from the viewpoint of making the emulsion droplets fine.

  The content of the component (b) in the oil-in-water emulsified cosmetic of the present invention is preferably 0.1 to 10%, and more preferably 0.5 to 5%. When the content of component (b) is within this range, an oil-in-water emulsified cosmetic with better emulsifiability and better stability over time can be obtained.

  The component (c) higher alcohol used in the present invention functions as an emulsification aid in the oil-in-water emulsion cosmetic of the present invention, and any higher alcohol used in ordinary cosmetics can be used. Can be used. Specific examples include stearyl alcohol, behenyl alcohol, hexadecyl alcohol, oleyl alcohol, isostearyl alcohol, octyldodecanol, cetostearyl alcohol, 2-decyltetradecinol, cholesterol, phytosterol, and the like. The above can be used. Among these, when any of stearyl alcohol, cetostearyl alcohol, behenyl alcohol, cholesterol, and phytosterol is selected as the component (c), it is easy to obtain finer emulsified droplets, and it is more refreshing and has particularly good temporal stability. A type emulsified cosmetic can be obtained.

  The content of the component (c) in the oil-in-water emulsion cosmetic of the present invention is preferably 0.01 to 10%, more preferably 0.1 to 5%. When the content of the component (c) is within this range, an oil-in-water emulsified cosmetic with better emulsification and better stability over time can be obtained.

  As the component (d) oil used in the present invention, any solid, paste, or liquid can be used as long as it is an oil used in ordinary cosmetics. Specifically, liquid oil, avocado oil, flaxseed oil, almond oil, olive oil, kyounin oil, wheat germ oil, sesame oil, rice germ oil, rice bran oil, safflower oil, soybean oil, corn oil, jojoba oil, macadamia nut Oil, mink oil, cottonseed oil, coconut oil, castor oil, liquid lanolin, squalane, squalene, liquid paraffin, pristane, polyisobutylene, undecylenic acid, oleic acid, linoleic acid, linolenic acid, isostearic acid, adipic acid-2-hexyldecyl , Monoisostearic acid-alkyl glycol, isocetyl isostearate, trimethylolpropane triisostearate, ethylene glycol di-2-ethylhexanoate, cetyl 2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, tetra-2 Pentaerythritol ethylhexanoate, cetyl octanoate, oleyl oleate, octyldodecyl oleate, neopentyl glycol dicaprate, 2-ethylhexyl succinate, isocetyl stearate, butyl stearate, di-2-ethylhexyl sebacate, cetyl lactate, Myristyl lactate, diisostearyl malate, glyceride triisostearate, glyceride tri-2-ethylhexanoate, glyceride di-2-heptylundecanoate, methylpolysiloxane, methylphenylpolysiloxane, ethylpolysiloxane, ethylmethylpolysiloxane, Examples include ethylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and the like. Use one or more of these. It can be. Paste oil includes cacao butter, shea butter, hydrogenated castor oil, hydrogenated coconut oil, lanolin, reduced lanolin, lanolin alcohol, lanolin acetate, lanolin fatty acid isopropyl, petrolatum, monostearic acid cured castor oil, monohydroxystearic acid cured Castor oil, cholesteryl hydroxystearate, dipentaerythritol fatty acid (12-hydroxystearic acid / stearic acid / rosin) ester, N-lauroyl-L-glutamic acid-di (cholesteryl behenyl octyldodecyl), macadamone nut oil fatty acid phytosteryl, etc. These can be used alone or in combination of two or more. Further, as solid oil, carnauba wax, candelilla wax, whale wax, beeswax, ceresin, paraffin wax, microcrystalline wax, stearic acid, behenic acid, 12-hydroxystearic acid, cetyl palmitate, polyethylene glycol distearate, monostearate Examples thereof include acid glyceride, glyceryl tribehenate, and stearyl-modified polysiloxane. These can be used alone or in combination.

  In the present invention, it is essential that the component (d) contains 40% or more of the solid oil and / or paste oil, more preferably 50% or more. When the content of the solid oil and / or paste oil in the component (d) is less than 40%, sufficient firmness cannot be given to the skin.

  The content of the component (d) in the oil-in-water emulsified cosmetic of the present invention is essential to be 1 to 30%, and preferably 3 to 25%. When the content of the component (d) is less than 1%, the skin cannot be given sufficient firmness and the moisturizing effect is not good. Moreover, when content of a component (d) exceeds 30%, stickiness will arise at the time of application | coating and a fresh feeling of use cannot be obtained.

  In the oil-in-water emulsified cosmetic of the present invention, the total content of the component (a) and the component (b) and the content ratio of the component (d) are 2: 1 to 1:10 by mass ratio. It is essential, and 1: 1 to 1:10 is preferable. When the total content of the component (a) and the component (b) exceeds twice the content of the component (d), stickiness occurs during application and the usability deteriorates. Further, when the total content of the component (a) and the component (b) is less than 0.1 times the content of the component (d), fine emulsified droplets cannot be obtained, and the stability over time is also deteriorated.

  As the component (e) polyhydric alcohol used in the present invention, any polyhydric alcohol used in ordinary cosmetics can be used. Specific examples include propylene glycol, dipropylene glycol, butylene glycol, glycerin, diglycerin, ethylene glycol, polyethylene glycol, and the like, and one or more of these can be used. Among these, when any one of propylene glycol, butylene glycol, and glycerin is selected as the component (e), it is easy to obtain finer emulsified droplets, and an oil-in-water emulsified cosmetic with particularly good temporal stability can be obtained. it can.

  The content of the component (e) in the oil-in-water emulsion cosmetic of the present invention is preferably 1 to 40%, more preferably 2 to 30%. When the content of the component (e) is within this range, an oil-in-water emulsified cosmetic with a more excellent moisturizing effect can be obtained with a fresh feeling of use.

  The component (f) water used in the present invention is a component that forms the outer phase of an oil-in-water emulsified cosmetic. The content of the component (f) in the oil-in-water emulsified cosmetic of the present invention is preferably 50 to 95%. When the content of the component (f) is within this range, an oil-in-water emulsified cosmetic with an excellent fresh feeling can be obtained.

  The particle size of the emulsified droplets in the oil-in-water emulsified cosmetic of the present invention is essential to be 1 μm or less, and more preferably 0.5 μm or less. When the particle size of the emulsified droplets exceeds 1 μm, a fresh feeling of use cannot be obtained.

  In the oil-in-water emulsified cosmetic of the present invention, in addition to the above essential components, as components used in ordinary cosmetics, anionic surfactants, cationic surfactants, amphoteric surfactants, aqueous components, water-soluble high Molecules, antioxidants, ultraviolet absorbers, powders, fragrances, preservatives, colorants, cosmetic ingredients, and the like can be contained within a range that does not impair the effects of the present invention.

  The oil-in-water emulsified cosmetics of the present invention are cosmetic cosmetics, lotions, emulsions, creams, packs, hair styling products, shaving lotions, sunscreens, and other basic cosmetics, foundations, base materials, concealers, mascara, and other makeup cosmetics. Applicable to the fee. In addition, as cosmetics in which the effects of the present invention are remarkably exhibited, eye cosmetics such as eye emulsions, eye creams, eye cosmetics, and the like. Furthermore, the form of the oil-in-water emulsified cosmetic of the present invention may be any of liquid, emulsion, cream, solid and the like.

Hereinafter, the present invention will be described in more detail with reference to examples. Note that these do not limit the present invention.
Examples 1 to 8 and Comparative Examples 1 to 8: Emulsions for the eyes The emulsions for the eyes having the compositions shown in Tables 1 and 2 were prepared by the production methods shown below, and "fresh feeling in use", "moisturizing effect", "skin For each item of “feel of elasticity”, “stability over time”, and “particle size of emulsified droplets”, the evaluation methods and judgment criteria shown below were evaluated, and the results are shown in Table 1 and Table 2 together. .

(Production method)
A: Components 1 to 8 are heated to 70 ° C. and mixed.
B: Component 9 is dissolved in a part of component 11, and component 10 is added and mixed.
C: The remainder of the component 11 is heated to 70 ° C.
D: [C] is added to [A] and emulsified.
E: [D] is cooled to 40 ° C., [C] is added and mixed uniformly.
F: [E] was filled in a container to obtain an eye emulsion.

[Evaluation methods: “Fresh feeling of use”, “Moisturizing effect”, “Feeling to the skin”]
Twenty cosmetic panel evaluation specialists used the eye lotions of the examples and comparative examples described above, and each of them gave a “fresh feel”, “moisturizing effect”, and “skin feel” according to the following criteria. The grade was evaluated for each emulsion, and the average score of all panels was determined according to the following criteria.
Evaluation criteria:
[Evaluation Result]: [Score]
Very good: 5 points Good: 4 points Normal: 3 points Somewhat bad: 2 points Bad: 1 point Criteria:
[Average score]: [Judgment]
4.5 or more: ◎
3.5 or more and less than 4.5: ○
1.5 or more and less than 3.5: △
Less than 1.5: ×

[Evaluation method: “Stability over time”]
The eye emulsions of the examples and comparative examples were stored in a constant temperature bath at 40 ° C. for 6 months, and the state after 6 months was visually determined according to the following criteria.
Judgment criteria:
[Appearance status]: [Judgment]
No change in 6 months: ◎
Slight creaming in 6 months (no problem in usability): ○
Creaming in one month: △
Creaming in one week: ×

[Evaluation method: “Emulsion droplet size”]
The eye emulsions of the examples and comparative examples were observed with an optical microscope (1000 times), and those having an emulsion droplet size of 1 μm or less were judged as ◯ and those exceeding 1 μm were judged as ×.

  As is apparent from the results of Tables 1 and 2, the eye lotions of Examples 1 to 8, which are the products of the present invention, are “fresh feeling of use”, “moisturizing effect”, “feeling of firmness to the skin”, The oil-in-water emulsified cosmetics were excellent in all items of “time stability” and the emulsion droplets of any emulsion were 1 μm or less. On the other hand, the emulsions for eyes of Comparative Examples 1 to 3 that do not contain phospholipid, nonionic surfactant, and higher alcohol are not good in stability over time because the particle size of the emulsified droplets exceeds 1 μm. It was. Moreover, the comparative example 4 which does not contain solid oil or paste oil in oil was not good in the moisturizing effect and the firmness to the skin. And the comparative example 5 which does not contain a polyhydric alcohol had a particle size of the emulsified droplets exceeding 1 μm, and the moisturizing effect was not good. Furthermore, in Comparative Example 6 in which the oil content exceeds 30%, the fresh feeling of use and the firmness to the skin were not good. Furthermore, in Comparative Examples 7 and 8 in which the solid oil and paste oil contents in the oil are less than 40%, the firmness to the skin was not good.

Example 9: eye lotion (component) (%)
1. Hydrogenated soybean phospholipid 0.2
2. Polyoxyethylene (30) cholestanol ether 0.8
3. Cetostearyl alcohol 0.5
4). Squalane 0.5
5). Decamethylcyclopentasiloxane 0.5
6). Beeswax 1.5
7). Glycerin 5
8). Dipropylene glycol 4
9. Purified water remaining amount 10. Ethanol 5
11. Preservative appropriate amount 12. Fragrance 0.1

(Production method)
A: Components 1 to 8 are heated to 70 ° C. and mixed.
B: Ingredient 9 is heated to 70 ° C.
C: [B] is added to [A] and emulsified.
D: [C] is cooled to 40 ° C., components 10 to 12 are added, and mixed uniformly.
E: [D] was filled in a container to obtain an eye lotion.
The eye lotion of Example 9 was excellent in all the items of “fresh feel”, “moisturizing effect”, “skin feel”, and “stability over time”, and each emulsion emulsion droplet was 1 μm. It was the following oil-in-water emulsified cosmetics.

Example 10: serum (component) (%)
1. Hydrogenated egg yolk phospholipid 1.5
2. Polyoxyethylene (20) stearyl ether 1
3. Behenyl alcohol 3
4). Macadamia nut oil 5
5). Liquid paraffin 5
6). N-lauroyl-L-glutamic acid-di (cholesteryl behenyl octyldodecyl) 3
7). Phytosteryl oleate 8
8). Glycerin 12
9. 1,3-Butylene glycol 6
10. Purified water remaining amount 11. Xanthan gum 0.1
12 Hydroxypropyl methylcellulose 0.1
13. Preservative appropriate amount14. Fragrance 0.05

(Production method)
A: Components 1 to 9 are heated to 70 ° C. and mixed.
B: Components 11 to 12 are dissolved in a part of component 10 and mixed.
C: The remainder of the component 10 is heated to 70 ° C.
D: [C] is added to [A] and emulsified.
E: [D] is cooled to 40 ° C., [C] and components 13 to 14 are added and mixed uniformly.
F: [E] was filled in a container to obtain a cosmetic liquid.
The cosmetic liquid of Example 10 is excellent in all the items of “fresh feeling of use”, “moisturizing effect”, “feel of firmness to skin”, and “stability over time”, and the emulsion droplets of any emulsion are 1 μm or less. It was an oil-in-water emulsified cosmetic.

Example 11: Eye Cream (Ingredient) (%)
1. Hydrogenated soybean phospholipid 2
2. Polyoxyethylene (20) sorbitan monooleate 3
3. Stearyl alcohol 3
4). Squalane 10
5). Paraffin wax 5
6). Candelilla wax 3
7). Dipentaerythritol fatty acid ester (Note 1) 5
8). Glycerin 10
9. Propylene glycol 10
10. Purified water remaining amount 11. Polyvinylpyrrolidone 1.5
12 Alkyl-modified carboxyvinyl polymer (Note 2) 0.3
13. Triethanolamine 0.1
14 Preservative appropriate amount15. Fragrance 0.1
* Note 1: Cosmall 168AR (Nisshin Oilio Co., Ltd.)
* Note 2: Carbopol 1342 (Goodrich Chemical)

(Production method)
A: Components 1 to 9 are heated to 70 ° C. and mixed.
B: Components 11 to 12 are dissolved in a part of component 10, and component 13 is added and mixed.
C: The remainder of the component 10 is heated to 70 ° C.
D: [C] is added to [A] and emulsified.
E: [D] is cooled to 40 ° C., [C] and components 14 to 15 are added and mixed uniformly.
F: [E] was filled in a container to obtain an eye cream.
The eye cream of Example 11 is excellent in all items of “fresh feeling in use”, “moisturizing effect”, “feel of firmness to skin”, and “stability over time”, and any emulsion emulsion droplets are 1 μm or less. It was an oil-in-water emulsified cosmetic.
more than

Claims (4)

The following components (a) to (f);
(A) Phospholipid (b) Polyoxyethylene cholesterol ether, polyoxyethylene cholestanol ether, polyoxyethylene phytosterol ether, polyoxyethylene phytostanol ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyglycerin One or more nonionic surfactants selected from fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ethers, propylene glycol fatty acid esters, and ethylene glycol fatty acid esters (c) stearyl alcohol, behenyl alcohol, Hexadecyl alcohol, oleyl alcohol, isostearyl alcohol, octyldodecanol, cetostearyl alcohol , 2-decyltetradecinol, cholesterol, and one or two or more of higher alcohols (d) an oil selected from phytosterols (provided that (b) and (c) except)
(E) It contains polyhydric alcohol (f) water, the content of component (a) is 0.1 to 10% by mass, the content of component (b) is 0.1 to 10% by mass, and component (c) The content of is 0.01 to 10% by mass, the content of component (d) is 1 to 30% by mass, the component (d) contains 40% by mass or more of solid oil and / or paste oil, and , The total content of component (a) and component (b) and the content ratio of component (d) is 2: 1 to 1:10 by mass ratio, and the particle size of the emulsion droplets is 0.5 μm or less An oil-in-water emulsified cosmetic characterized by The oil-in-water emulsion cosmetic according to claim 1, wherein the content of the component (d) is 3 to 25% by mass. The component (b) is one or two or more selected from polyoxyethylene cholesterol ether, polyoxyethylene cholestanol ether, polyoxyethylene phytosterol ether and polyoxyethylene phytostanol ether. The oil-in-water emulsified cosmetic described in 1. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein the cosmetic is an eye-only cosmetic.