JP2010248178A - Emulsion cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emulsion cosmetic excellent not only in linoleic acid stability but also excellent in fresh after-feel and emollient effect and further in long-term stability. <P>SOLUTION: What is provided is an emulsion cosmetic comprising the following components (a) to (f): (a) linoleic acid; (b) a phospholipid having a phosphatidylcholine content of 90 mass% or higher; (c) cholesterol and/or phytosterol; (d) one or more ester oils each of which is a monoester of a 6-10C branched fatty acid with a 5-18C alcohol and is liquid at 25°C; (e) dibutylhydroxytoluene; and (f) water. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an emulsified cosmetic that stably contains linoleic acid. More specifically, the present invention relates to a phospholipid, cholesterol and / or phytosterol containing 90% by mass or more of linoleic acid, phosphatidylcholine, and a branch having 6 to 10 carbon atoms. Monoester of fatty acid and alcohol having 5 to 18 carbon atoms, containing one or more ester oils that are liquid at 25 ° C, dibutylhydroxytoluene and water, excellent in stability of linoleic acid, fresh The present invention relates to an emulsified cosmetic having characteristics excellent in feeling of use and emollient effect.

Various active ingredients are blended in cosmetics according to the purpose of use. Among them, whitening cosmetics that promote the whitening effect have been an important item since ancient times. Has been done. There are many types of whitening agents, and there is a technique using linoleic acid as a whitening agent (see, for example, Patent Document 1).
In addition, synergistically combining linoleic acid and the like with an oil-soluble extract extracted from licorice, and synergistically combining linoleic acid and the like with sap of the birch family Birch. There is a technique for increasing the whitening effect (see, for example, Patent Document 3). There is also a technique of stably blending linoleic acid (see, for example, Patent Document 4).

JP 63-284109 A Japanese Patent Laid-Open No. 05-194176 JP 09-291021 A Japanese Patent No. 2665976

  However, in the techniques of Patent Documents 1 to 3, since linoleic acid is a kind of unsaturated fatty acid, there are cases where the stability of linoleic acid is problematic, for example, linoleic acid itself is oxidized. Moreover, in the technique of patent document 4, although it is a technique which mix | blends linoleic acid stably, it is the component at the time of use by phosphoric acid, a phosphate, an aliphatic oxypolybasic acid, its salt, or monoester which are mix | blended. When it feels sticky to the skin or depending on the blended oil agent, creaming or precipitation of dibutylhydroxytoluene may occur over time, which may cause problems with stability over time.

  That is, there is no disclosure regarding a linoleic acid-containing cosmetic material that is excellent in usability as a cosmetic material that is excellent in stability of linoleic acid but has no stickiness, and it is an object to develop this.

  In view of this situation, the present inventors have conducted extensive studies to solve the above problems, and as a result, the component (a) linoleic acid, the component (b) phospholipid having a phosphatidylcholine content of 90% by mass or more, the component (c) cholesterol, and / Or phytosterol, component (d) monoester of a branched fatty acid having 6 to 10 carbon atoms and an alcohol having 5 to 18 carbon atoms, and one or more ester oils that are liquid at 25 ° C., component ( e) By emulsifying cosmetics containing dibutylhydroxytoluene and component (f) water, it has excellent linoleic acid stability, has excellent usability and emollient effect, and further includes creaming and precipitation of dibutylhydroxytoluene And found that the emulsified cosmetic composition is excellent in stability over time and has completed the present invention.

That is, the present invention provides the following components (a) to (f);
(A) Linoleic acid (b) Phospholipid having a phosphatidylcholine content of 90% by mass or more (c) Cholesterol and / or phytosterol (d) Mono of a branched fatty acid having 6 to 10 carbon atoms and an alcohol having 5 to 18 carbon atoms The present invention relates to an emulsified cosmetic comprising one or more ester oils which are esters and are liquid at 25 ° C. (e) dibutylhydroxytoluene (f) water.

  Moreover, it is related with the emulsified cosmetic characterized by content of the oil agent of a component (d) being 0.01-3.0 mass%.

  Furthermore, it is related with the emulsified cosmetic characterized by the viscosity in 25 degreeC being 5000 mPa * s or less.

  It is related with the emulsified cosmetics characterized by the average particle diameter of an emulsified droplet being 300 nm or less.

  The emulsified cosmetic of the present invention is excellent in the stability of linoleic acid, has a fresh feeling in use and an emollient effect, and has an effect of being excellent in stability over time.

  The linoleic acid of the component (a) of the present invention is one of unsaturated fatty acids having 18 carbon atoms having two double bonds in the molecule, and in the emulsified cosmetic of the present invention, a whitening effect is imparted. It is blended for the purpose. Although it will not specifically limit if it is normally used for cosmetics, Any of a natural product and a synthetic product may be sufficient. Natural products are often contained in vegetable oils such as safflower oil and corn oil.

  The content of the component (a) is not particularly limited, but is preferably 0.01 to 1% by mass (hereinafter simply referred to as “%”), and more preferably 0.03 to 0.3%. If it is in this range, it becomes an emulsified cosmetic excellent in the stability of linoleic acid.

  The phospholipid having a phosphatidylcholine content of 90% by mass or more of the component (b) of the present invention is used as an emulsifier or the like in the emulsified cosmetic of the present invention, and is usually limited as long as it is usually used in cosmetics and the like. Is not to be done. Specific examples include soy lecithin extracted from natural soybean and egg yolk, egg yolk lecithin and / or hydrogenated soybean lecithin hydrogenated with these, hydrogenated egg yolk lecithin, synthetic phospholipids, and the like, which are generally known as phospholipids. These phospholipids can be used alone or in combination of two or more as required. Examples of the type of phospholipid include phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylserine, phosphatidic acid, and phosphatidylinositol. Among them, the present invention has a phosphatidylcholine (hereinafter abbreviated as PC) content of 90%. It is necessary to be the above phospholipid. When the PC content is less than 90%, it functions as an emulsifier, but may not be preferable in terms of the stability of linoleic acid. Examples of the phospholipid having a PC content of 90% by mass or more include resinol S-10EX (PC content 95% or more) provided by Nikko Chemicals Co., Ltd., COATSOME NC-20 (PC content provided by Nikko Co., Ltd.) 90% or more), COATSOME NC-21 (PC content 90% or more), and the like can be used. Further, the component (a) phospholipid having a PC content of 90% can be used with no particular problems even if it is pre-complexed with cholesterol or phytosterol of the component (c) described later.

  Although content of a component (b) is not specifically limited, 0.3 to 10% is preferable and 0.5 to 3% is more preferable. If it is this range, the emulsified cosmetics excellent in temporal stability can be obtained.

  The component (c) cholesterol and phytosterol of the present invention are contained in order to improve the stability of linoleic acid and also improve the temporal stability of the emulsified cosmetic. Although a mixture with the component (b) described above can be used, the use of a composite material improves the stability over time and further improves the stability of linoleic acid. Examples of commercially available products include Presome C-I (Nippon Seika Co., Ltd.), Presome CSII-101 (Nippon Seika Co., Ltd.), and Phytopresome (Nippon Seika Co., Ltd.).

  The content of component (c) is not particularly limited, but is preferably 0.01 to 3%, more preferably 0.1 to 1%. If it is this range, the emulsified cosmetics excellent in the stability of linoleic acid can be obtained.

  Component (d) of the present invention is a monoester of a branched fatty acid having 6 to 10 carbon atoms and an alcohol having 5 to 18 carbon atoms and is liquid at 25 ° C. Component (d) can stably contain linoleic acid in an emulsified cosmetic, and an emulsified cosmetic having an excellent emollient effect can be obtained. Furthermore, since component (d) also has an effect of suppressing precipitation of component (e) described later, it is possible to improve the temporal stability of the emulsified cosmetic. Specific examples of such component (d) include cetyl isooctanoate, isononyl isononanoate, isotridecyl isononanoate, and one or more of them can be used as necessary.

  By using these components, linoleic acid can be stably blended in the emulsified particles, so that the stability of linoleic acid and the stability over time are excellent. In particular, in a system with a small amount of oil agent, generally, linoleic acid in the emulsified particles is incompatible with other oil agent, and there is a problem that stability over time is impaired, such as creaming. When d) is used, compatibility is improved and stability over time is good.

  The content of the component (d) is not particularly limited, but in the case of stably containing linoleic acid and further emulsifying cosmetics with a fresh feeling of use, 0.01 to 3% is preferable, 0.1 ~ 2% is more preferred. Within this range, an emulsified cosmetic with high emollient effect and excellent stability over time can be obtained.

  The component (e) dibutylhydroxytoluene of the present invention is contained for the purpose of suppressing oxidative deterioration of the component (a).

Although content of a component (e) is not specifically limited, 0.001-0.5% is preferable and 0.01-0.1% is more preferable. When component (e) is contained in this range, a cosmetic excellent in the stability of component (a) can be obtained.
Although not particularly limited, the content mass ratio (a) :( e) of the component (a) and the component (e) should be in the range of 1: 2 to 50: 1, and further 2: 1 to 10: 1. As a result, the stability of linoleic acid and the stability over time can be remarkably improved.

  The water of component (f) of the present invention is not particularly limited as long as it is usually used for cosmetics and the like, and examples thereof include purified water, hot spring water, deep water, or steam distilled water such as plants. Purified water such as ion-exchanged water or distilled water is particularly preferable because there are few impurities such as metal ions.

  Although content of the component (f) of this invention is suitably determined by content of component (a)-(e), it is about 70 to 99% in general.

  As a method for producing the emulsified cosmetic of the present invention, various methods can be used. For example, (a), (b), (c) and (d), which have been heated and mixed at 70 ° C. while stirring with a disperser mixer, are mixed with the component (e) and water previously heated and mixed at 70 ° C. It is emulsified by gradually adding, and gradually cooled to room temperature. Furthermore, emulsified cosmetics can be obtained by high-pressure treatment with a microfluidizer (manufactured by Microfluidics). By carrying out the high-pressure treatment, the average particle diameter of the emulsified droplets can be made fine, the viscosity can be lowered, a fresh feeling of use can be obtained, and the temporal stability is also improved. In addition to the microfluidizer, it is possible to use equipment capable of high-pressure processing, such as a Menton-Gorin type high-pressure homogenizer, a jet water flow reversal type high-pressure emulsifier, a microfluidizer (manufactured by Microfluidic), Examples thereof include a nanomizer (manufactured by Nanomizer), an optimizer (manufactured by Sugino Machine), DeBee2000 (manufactured by BEE International), and an ultrasonic emulsifier. Two or more of these high-pressure dispersers can be used in combination or can be processed multiple times.

  In addition, in the emulsified cosmetic according to the present invention, the stability of linoleic acid can be improved by setting the average particle size of the emulsified droplets to 300 nm or less, and the average particle size is set to 250 nm or less, further 100 nm or less. Thus, it is possible to obtain an emulsified cosmetic that is particularly excellent in stability of linoleic acid and stability over time. The average particle diameter can be measured using COULTER N-4 type (manufactured by BECKMAN COULTER) or the like.

  The emulsified cosmetic of the present invention is not particularly limited as a viscosity value, but has a characteristic that it is excellent in stability over time even in a low viscosity region of 5000 mPa · s or less at 25 ° C., and is also excellent in freshness and emollient effect. It becomes. A Brookfield viscometer can be used for the measurement of the viscosity value here, and it can be measured using a “single cylinder type rotational viscometer—Bismetron” (manufactured by Shibaura System).

  The stability of linoleic acid was evaluated by measuring the residual ratio of linoleic acid in the emulsified cosmetic. The measurement can be performed using high performance liquid chromatography (2695 Separations Module, manufactured by Waters).

  In addition, the emulsified cosmetic of the present invention can be a multi-layer type such as an oil-in-water type, a water-in-oil type, a water-in-oil-in-water type, and an oil-in-water-in-oil type. Cosmetics are preferred.

  In the emulsified cosmetic of the present invention, in addition to the essential components described above, as components normally used in cosmetics, for example, powder, surfactant, oil agent, water-soluble polymer, alcohol, gelling agent, film formation Agents, resins, ultraviolet absorbers, humectants, pH adjusters, preservatives, fragrances, antioxidants, metal sequestering agents, colorants, cosmetics, and the like can be contained within a range that does not impair the effects of the present invention. .

  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 13 and comparative products 1 to 6: Oil-in-water cosmetic liquids Finely emulsified cosmetics having the compositions shown in Tables 1 to 4 were prepared by the following production methods, and “viscosity value” and “stability of linoleic acid”. ”,“ Stability over time (creaming) ”,“ Stability over time (precipitation) ”,“ Warmness ”and“ Emollient effect ”are evaluated according to the following evaluation methods and criteria, and the results are combined. Tables 1 to 4 show. In the table, component No. In the hydrogenated soybean phospholipid / cholesterol composite of No. 4, the PC purity of the hydrogenated soybean phospholipid is 90%.

(Production method of the present invention products 1-16, 18 and comparative products 1-6)
A. Components (1) to (11) were mixed by heating and kept at 70 ° C.
B. Add component (12) heated to 60 ° C. to A and emulsify.
C. Cool B to room temperature.
D. C was subjected to high pressure treatment (treatment pressure 200) with a microfluidizer to obtain a cosmetic liquid.

(Production method of the present invention product 17)
A. Components (1) to (11) were mixed by heating and kept at 70 ° C.
B. Add component (12) heated to 60 ° C. to A and emulsify.
C. B was cooled to room temperature to obtain a serum.

[Viscosity value]
The viscosity values at 25 ° C. of the oil-in-water cosmetic liquids of the inventive products 1 to 18 and the comparative products 1 to 6 were measured with a single cylindrical rotary viscometer—Bismetron (manufactured by Shibaura System) as a Brookfield viscometer .

[Stability of linoleic acid]
The contents of linoleic acid in the oil-in-water cosmetic liquids of the present invention products 1 to 18 and comparative products 1 to 6 were measured by high performance liquid chromatography (2695 Separations Module manufactured by Waters). The measurement was based on the detected amount immediately after production (30 ° C.), and the residual rate was calculated from the detected amount as compared with the detected amount after one month at 40 ° C.
Judgment criteria:
[Remaining rate]: [Judgment]
95% or more: ◎
90% to less than 95%: ○
85% or more and less than 90%: △
Less than 85%: ×

[Stability over time (creaming)]
The oil-in-water cosmetic liquids of the present invention products 1 to 18 and comparative products 1 to 6 were stored in a thermostatic bath at 50 ° C. for 3 months, visually observed, and evaluated over time.
Judgment criteria:
[Creaming condition by storage]: [Grade]
Creaming is not recognized even after 3 months: ◎
Creaming is not allowed in 2 months: ○
Creaming is not recognized in one month: △
Creaming within one month: x

[Stability over time (precipitation)]
The oil-in-water cosmetic liquids of the present invention products 1 to 18 and comparative products 1 to 6 were stored in a thermostatic bath at 50 ° C. for 3 months, visually observed, and evaluated over time.
Judgment criteria:
[State of precipitation due to storage]: [Score]
No precipitation is observed even after 3 months: ◎
No precipitation is observed in 2 months: ○
No precipitation observed in 1 month: △
Precipitation is observed within one month: ×

〔sensory evaluation〕
Twenty cosmetic panel specialists use the oil-in-water essences of the present invention products 1 to 13 and comparative products 1 to 6, and for each of the items "Mizumizushi" and "Emollient effect" Five levels were evaluated according to the following evaluation criteria, and a score was assigned to each lotion, 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: ×

As is apparent from the results of Tables 1 to 4, the oil-in-water cosmetic liquids of the present invention products 1 to 18 according to the present invention are “stability of linoleic acid”, “stability over time (creaming)”, “stable over time” It was a liquid cosmetic excellent in all the items of “property (precipitation)”, “freshness”, and “emollient effect”.
On the other hand, the comparative product 1 having a low PC content of the component (b) was remarkably inferior in “stability over time (creaming)”, and “linoleic acid stability” and “freshness” were not good. . In Comparative Product 2 containing no component (c), the “stability of linoleic acid” and “stability over time (creaming)” were not good. Comparative products 3 to 6 containing different oil types instead of component (d) were not good in all items.

Oil-in-water beauty serum (ingredient) (%)
1. Linoleic acid 0.1
2. Hydrogenated soybean phospholipid (PC purity 95% or more) 1.2
3. Cholesterol 0.3
4). Glycerin 4.0
5.1,3-Butylene glycol 16.0
6). Cetyl isooctanoate 0.5
7). Isotridecyl isononanoate 1.0
8). Dibutylhydroxytoluene 0.02
9. Carboxyvinyl polymer 0.1
10. Citric acid 0.1
11. Sodium citrate 0.1
12 Sodium hydroxide appropriate amount13. Glycylglycine 0.05
14 Hydroxyproline 0.02
15. Purified water remaining amount 16. Fragrance 0.1

(Production method)
A: Components (1) to (9) are dissolved by heating at 70 ° C.
B: Components (10) to (15) are heated at 70 ° C., then added to A and emulsified.
C: After cooling B to room temperature, component (16) is added.
D: C was subjected to high-pressure treatment (treatment pressure 180) with a microfluidizer to obtain an oil-in-water essence.

  The oil-in-water cosmetic liquid of Example 2 was excellent in the stability of linoleic acid and stability over time, fresh feeling in use and high emollient effect. The viscosity value was 2500 mPa · s, and the average particle size was 300 nm or less.

Oil-in-water beauty serum (ingredient) (%)
1. Linoleic acid 0.1
2. Hydrogenated soybean phospholipid (PC purity 90% or more) 2.8
3. Cholesterol 0.7
4). Cetyl isooctanoate 3.0
5). Sorbitan sesquioleate 1.5
6). Methylpolysiloxane 2.0
7). Vitamin E 0.01
8). Dibutylhydroxytoluene 0.3
9. Glycerin 3.0
10.1,3-butylene glycol 15.0
11.1,2-Pentanediol 2.0
12 Xanthan gum 0.05
13. Phosphoric acid 0.1
14 Sodium monohydrogen phosphate 0.1
15. Theanine 0.05
16. Purified water remaining

(Production method)
A: Components (1) to (11) are dissolved by heating at 70 ° C.
B: Components (12) to (16) are heated at 70 ° C., then added to A and emulsified.
C: Cool B to room temperature.
D: C was subjected to high pressure treatment (treatment pressure 200) with a microfluidizer to obtain a serum.

  The oil-in-water cosmetic liquid of Example 3 was excellent in stability of linoleic acid and stability over time, fresh feeling in use, and high emollient effect. The viscosity value was 800 mPa · s, and the average particle size was 300 nm or less.

Oil-in-water emulsion (component) (%)
1. Linoleic acid 0.1
2. Hydrogenated soybean phospholipid (PC purity 95% or more) 2.4
3. Cholesterol 0.6
4). Soy lysophospholipid 0.4
5). Cetyl isooctanoate 1.7
6). Squalane 0.5
7). Polyoxyethylene (20) sorbitan monooleate 2.0
8). Liquid paraffin 0.5
9. Jojoba oil 1.0
10. Dibutylhydroxytoluene 0.1
11.1,2-Pentanediol 2.0
12 Glycerin 10.0
13. Acrylic acid-alkyl methacrylate copolymer (* 1) 0.15
14 Carboxyvinyl polymer 0.1
15. Sodium hydroxide appropriate amount 16. Methyl paraoxybenzoate 0.1
17. Hyaluronic acid 0.01
18. Purified water remaining (* 1) Pemulen TR-2 (manufactured by NOVEON)

(Production method)
A: Components (1) to (12) are dissolved by heating at 70 ° C.
B: Components (13) to (18) are heated at 70 ° C., then added to A and emulsified.
C: Cool B to room temperature.
D: C was subjected to high-pressure treatment (treatment pressure 200) with a microfluidizer to obtain an oil-in-water emulsion.

  The oil-in-water emulsion of Example 4 was excellent in the stability of linoleic acid and the stability over time, the feeling of use was fresh, and the emollient effect was high. The viscosity value was 5000 mPa · s, and the average particle size was 300 nm or less.

Oil-in-water oil-in-oil emulsion (component) (%)
1. Linoleic acid 0.3
2. Hydrogenated soybean phospholipid (PC purity 95%) or more 4.0
3. Cholesterol 1.0
4). Cetyl isooctanoate 1.0
5). Isostearic acid 3.0
6). Glycerin 6.5
7.1,3-Butylene glycol 10.5
8). Dibutylhydroxytoluene 0.1
9. Purified water remaining amount 10. Ethanol 5.0
11. Methyl paraoxybenzoate 0.2
12 Sodium chloride 1.0
13. PEG-9 polydimethylsiloxyethyl dimethicone 4.0
14 Decamethylcyclopentasiloxane 10.0
15. Dimethylpolysiloxane 5.0
16. Perfume appropriate amount (* 2) KF-6028 (manufactured by Shin-Etsu Chemical Co., Ltd.)

(Production method)
A: Components (1) to (8) are dissolved by heating at 70 ° C.
B: Components (9) to (12) are heated and dissolved at 70 ° C., then added to A and emulsified.
C: Cool B to room temperature.
D: C is subjected to high pressure processing (processing pressure 200) by a microfluidizer.
E: Components (13) to (16) are mixed uniformly.
F: D was dispersed in E to obtain an oil-in-water emulsion in oil.

  Since the oil-in-water-in-oil emulsion of Example 5 stabilized linoleic acid in the innermost phase, it was excellent in linoleic acid stability and stability over time, and had a high emollient effect. The viscosity value was 3800 mPa · s, and the average particle size was 300 nm or less.

Oil-in-water oil-type beauty serum (component) (%)
1. Linoleic acid 0.1
2. Hydrogenated soybean phospholipid (PC purity 90% or more) 1.5
3. Cholesterol 0.3
4). Cetyl isooctanoate 0.5
5). Olive oil 1.0
6). Glycerin 5.0
7.1,3-Butylene glycol 3.0
8). Dibutylhydroxytoluene 0.05
9. Purified water remaining amount 10. Ethanol 5.0
11. Ethyl paraoxybenzoate 0.1
12 Lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone 1.0
13. Cetyl dimethicone copolyol 0.5
14 Decamethylcyclopentasiloxane 8.0
15. Dimethylpolysiloxane 5.0
16. Propylene glycol dicaprate 5.0
17. Perfume

(Production method)
A: Components (1) to (8) are dissolved by heating at 70 ° C.
B: Components (9) to (11) are heated at 70 ° C., then added to A and emulsified.
C: Cool B to room temperature.
D: C is subjected to high pressure processing (processing pressure 200) by a microfluidizer.
E: Components (12) to (17) are mixed uniformly.
F: D was dispersed in E to obtain an oil-in-water oil serum.

The oil-in-water emulsion of Example 6 is stabilized with linoleic acid in the innermost phase, and thus has excellent linoleic acid stability and stability over time, has a fresh feeling of use, and has a high emollient effect. It was. The viscosity value was 3100 mPa · s, and the average particle size was 300 nm or less.

Oil-in-water oil cream (ingredient) (%)
1. Linoleic acid 1.0
2. Hydrogenated soybean phospholipid (PC purity 90% or more) 5.0
3. Phytosterol 1.5
4). Cetyl isooctanoate 1.0
5). Dibutylhydroxytoluene 0.5
6). Glycerin 15.0
7.1,3-Butylene glycol 15.0
8). Glyceryl trioctanoate 7.0
9. Purified water remaining amount 10. Ethanol 6.0
11. Ethyl paraoxybenzoate 0.1
12 Sodium lactate 3.0
13. PEG-3 Dimethicone 2.0
14 Cetyl dimethicone copolyol 0.5
15. Decamethylcyclopentasiloxane 10.0
16. Dimethylpolysiloxane 5.0
17. Propylene glycol dicaprate 5.0
18. Perfume

(Production method)
A: Components (1) to (8) are dissolved by heating at 70 ° C.
B: Components (9) to (12) are heated at 70 ° C., then added to A and emulsified.
C: Cool B to room temperature.
D: C is subjected to high pressure processing (processing pressure 200) by a microfluidizer.
E: Components (13) to (18) are mixed uniformly.
F: D was dispersed in E to obtain an oil-in-water cream in oil.

  The oil-in-water emulsion of Example 4 is stabilized with linoleic acid in the innermost phase, so it has excellent linoleic acid stability and stability over time, has a fresh feeling of use, and has a high emollient effect. It was. The viscosity value was 12000 mPa · s, and the average particle size was 300 nm or less.

Claims (4)

The following components (a) to (f);
(A) Linoleic acid (b) Phospholipid having a phosphatidylcholine content of 90% by mass or more (c) Cholesterol and / or phytosterol (d) Mono of a branched fatty acid having 6 to 10 carbon atoms and an alcohol having 5 to 18 carbon atoms One or more ester oils that are esters and are liquid at 25 ° C. (e) Dibutylhydroxytoluene (f) Water-containing emulsified cosmetics.   The emulsified cosmetic according to claim 1, wherein the content of the component (d) is 0.01 to 3.0% by mass.   The emulsified cosmetic according to claim 1 or 2, wherein the viscosity at 25 ° C is 5000 mPa · s or less. The emulsified cosmetic according to any one of claims 1 to 3, wherein the average particle size of the emulsified droplets is 300 nm or less.