JP2019147785A - Oil-in-water emulsion composition - Google Patents

Abstract

To provide an oil-in-water emulsion composition that moisturizes skin, softens the skin, gives it a springy feeling, and also has excellent temporal stability.SOLUTION: An oil-in-water emulsion composition contains following components (A)-(C): (A) N-acyl amino acid or a salt thereof, (B) phytosteryl oleate, and (C) oil solution with a water holding capacity of 150% or more relative to the self-weight.SELECTED DRAWING: None

Description

  The present invention relates to an oil-in-water emulsion composition, and more specifically, an N-acylamino acid or a salt thereof, phytosteryl oleate, and an oil agent having a water-holding power of 150% or more for its own weight. The present invention relates to an oil-in-water emulsified composition, which imparts a firmness and flexibility to the skin and is characterized by excellent moisture persistence and stability over time.

In recent years, the use of skin care cosmetics by women has been diversified. In addition to cosmetics aimed at moisturizing, anti-aging effects are expected, for example, skin whitening, spots, wrinkles reduction, skin Cosmetics for the purpose of giving a feeling of youthfulness are widely accepted.
The following techniques are disclosed as an example for the purpose of firmness and persistence of firmness. An oil-in-water emulsified cosmetic (for example, Patent Document 1) that imparts firmness and persistence to hard oil by combining an ester of unsaturated fatty acid with cholesterol or phytosterol and beeswax, or glyceryl isostearate or An emulsified skin external preparation (for example, Patent Document 2) and particle size which has polyvinyl alcohol as a main component, gives a firm feeling by forming a film on the skin, and is excellent in long-term stability in a wide temperature range from low to high. The composition for external use (for example, patent document 3) etc. which disperse | distributed 10-2000 micrometers oil-based particle | grains in the water layer containing polyvinyl alcohol are proposed. Furthermore, by applying a liquid oily cosmetic containing 90% or more of polar oil to the skin, the skin is given a sense of elasticity, and then a hydrocarbon wax or solid lipophilic cosmetic is applied on the application site. By doing so, a skin care method (for example, Patent Document 4) and the like characterized by persistence of tension is presented.

Japanese Patent Application No. 2013-213957 JP2011-148716A JP 2011-46629 A JP 2013-32342 A

  However, any of the conventional techniques is a technique that imparts a firm feeling and maintains a firm feeling by forming a hard film on the skin, and is insufficient to meet diversifying consumer demands. In particular, when giving a strong feeling of firmness, a hard elasticity component remains on the skin. In the technique of Patent Document 1, there is no stickiness by combining an unsaturated fatty acid and an ester of cholesterol or phytosterol, and beeswax, which gives a firm feeling to the skin, but since a hard oil agent remains on the skin, The effect of softening the skin was lacking. In the techniques of Patent Document 2 and Patent Document 3, a film is formed on the skin to prevent evaporation of moisture, but it is intended to give a firm feeling to the skin surface. Yes, it lacked the effect of softening the skin. In the technique of Patent Document 4, a liquid lipophilic cosmetic containing a high concentration of polar oil is applied to the skin to make the skin soft and firm, but lacks sustainability. A skin care method for applying a hydrocarbon wax or solid lipophilic cosmetic on the application site, but the polar oil alone does not provide sufficient elasticity and the hydrocarbon wax or solid lipophilic on the application part. By applying cosmetics, the softness of the skin was poor. On the other hand, in order to improve flexibility, means for improving the moisture content of the skin by using an oil agent having a high water holding power is also known, but oil agents having a high water holding power are generally polar oils, and oil agents in oil-in-water emulsions. When the ratio of the polar oil increases, generally, coalescence and separation are likely to occur and the stability of the emulsion is lowered.

  In consideration of the above-mentioned problems in the prior art, in the present invention, the oil agent that gives a firm feeling to the skin is highly viscous, waxy and hard, which impairs the flexibility of the applied skin, while hydration It is a contradiction that the oil has a very high water holding power by having many possible functional groups, and the oils that give moisture and softness to the skin are mostly liquid to low-viscosity and often have a low suppleness effect on the skin. The aim was to develop an oil-in-water composition that eliminates this problem and has excellent temporal stability.

  In view of the above situation, as a result of earnest research, the present inventor has obtained an oily component combined from an oil that imparts a viscous, wax-like elasticity, and an oil that has a hydratable functional group and can be expected to have a high water holding power. Property screening was performed. As a result, by combining a specific agent from phytosteryl oleate and an oil agent other than phytosteryl oleate having a water holding power of 150% or more of its own weight, the water holding power is greatly increased as compared to before mixing, and 250 We found that it became more than%. In addition, considering the application to oil-in-water emulsions, we confirmed the effect of the third component on the stability in the formulation system, found a characteristic that stability with time is excellent by combining with N-acylamino acid or a salt thereof, The present invention has been completed.

That is, the present invention includes the following components (A), (B), (C);
(A) N-acylamino acid,
(B) Oil agent having hydrating power of 150% or more for phytosteryl oleate (C) dead weight (excluding (B))
It is related with the oil-in-water type emulsion composition characterized by containing.

  The oil-in-water emulsion composition of the present invention imparts firmness to the skin, is excellent in moisture retention and flexibility, and is also excellent in stability over time.

  Hereinafter, the present invention will be specifically described with a focus on preferred embodiments. In the present specification, “to” means a range including numerical values before and after.

  The component (A) N-acylamino acid or salt thereof used in the present invention is one in which at least one amino group in the amino acid is acylated and further neutralized with a basic substance. Moreover, you may neutralize with the basic substance in prescription during the manufacturing process of invention goods.

  The amino acid constituting the component (A) N-acylamino acid or a salt thereof may be neutral, acidic, basic, and has a functional group other than a carboxyl group and an amino group. In particular, glutamic acid, aspartic acid, glycine, alanine, threonine, methylalanine, sarcosine, lysine, arginine and the like can be mentioned. These amino acids may be L-form, D-form or DL-form. One of these may be used, or two or more selected from the above group may be mixed and used. From the viewpoints of dispersion stability and no stickiness, acidic amino acids or neutral amino acids are more preferred. Specifically, glutamic acid, aspartic acid, glycine, and alanine are more preferable, and glutamic acid is particularly preferable.

  As the acyl group constituting such component (A) N-acylamino acid or a salt thereof, an acyl group derived from a saturated or unsaturated linear or branched fatty acid having 8 to 22 carbon atoms can be used. For example, examples of fatty acids include caprylic acid, capric acid, lauric acid, myristic acid, stearic acid, isostearic acid, palmitic acid, oleic acid, linoleic acid, behenic acid, coconut oil fatty acid, palm oil fatty acid, and hardened beef tallow fatty acid. These may be used alone or in combination of two or more. In particular, lauric acid, myristic acid, stearic acid, coconut oil fatty acid, and palm oil fatty acid are preferable from the viewpoint of imparting stability over time and skin flexibility, and lauric acid, myristic acid, and stearic acid are particularly preferable.

  The salt of the N-acylamino acid is not particularly limited, and examples thereof include inorganic salts such as sodium, potassium, calcium, magnesium, aluminum, and zinc, organic amines such as ammonia, monoethanolamine, diethanolamine, and triethanolamine, and arginine. And organic salts such as basic amino acids such as lysine, etc., and one or more of these can be used in combination. From the viewpoint of emulsion stability, sodium, potassium, triethanolamine and arginine salts are preferred.

  The content of the component (A) used in the present invention is not particularly limited, but is preferably 0.01 to 0.5 in view of not only skin flexibility but also stability over time. % (Hereinafter simply referred to as “%”), more preferably 0.1 to 0.5%, and still more preferably 0.1 to 0.4%.

In the present invention, the component (A) N-acylamino acid or a salt thereof used in the present invention can be expected to have an effect mainly on skin softness.

  Component (B) phytosteryl oleate used in the present invention is an ester of oleic acid and phytosterol.

  Examples of such component (B) phytosteryl oleate include those extracted and purified from rice bran and rice germ, and those obtained by synthesis, but those extracted and purified from rice bran and rice germ are preferred. . The main components of the phytosteryl oleate are oleic acid, phytosterol and the like, and phytosterol is a general term for an organic mixture having a sterol skeleton obtained from a plant, among which mainly β-sitosterol, campesterol, stigmasterol, Brush castorol is included. In order to synthesize the phytosterol ester contained in the present invention, a mixture thereof may be used, or may be used alone.

  Such component (B) phytosteryl oleate has a melting point that varies depending on the conditions (time, place, variety, sampling method, etc.) to be obtained, but is approximately 30 ° C. to 50 ° C. at 1 atm. The thing around 35 degreeC-45 degreeC is preferable.

  Examples of such commercially available products of component (B) include lyesterol ester (manufactured by Tsukino Rice Fine Chemicals), Saracos PO (T) (manufactured by Nisshin Oillio Group), and the like.

  Although content of such a component (B) is not specifically limited, In order to provide the firmness of the skin after composition application, Preferably it is 0.1 to 10%, More preferably It is 0.1 to 7%, and 0.1 to 5% is still more preferable.

  In the present invention, such a component (B) can be expected to give a firm feeling after application.

  The oil agent having a water holding power with respect to its own weight of 150% or more used in the present invention has a water holding power of 150% or more by the following test method.

  Test method: Weigh 20 g of oil in a 200 ml beaker, heat to 50 ° C., gradually add water at 50 ° C. while stirring at 3000 rpm with a desper mixer, and measure the maximum water mass without draining. Was divided by 20 and multiplied by 100 was taken as the water holding power.

  Any component (C) can be used as long as it can be used for external preparations for skin or cosmetics, vegetable oils, animal oils, fatty acids, higher alcohols, sterols, sugars, polyhydric alcohols, amino acids. And ester compounds with components having a hydroxyl group such as castor oil, specifically castor oil, shea butter, beef tallow, N-acyl amino acid ester, glycerin fatty acid ester, dimer acid ester, dipentaerystol fatty acid ester Etc. More specifically, for example, N-lauroyl-L-glutamate di (phytosteryl / 2-octyldodecyl), N-lauroyl-L-glutamate dioctyldodecyl, N-lauroyl-L-glutamate di (cholesteryl / octyldodecyl), N -N-acyl amino acid esters such as lauroyl-L-glutamate di (cholesteryl / behenyl / octyldodecyl), N-lauroyl-L-glutamate di (phytosteryl / behenyl / octyldodecyl), hexaglycerin fatty acid ester, decaglycerin fatty acid ester, (Adipic acid / 2-ethylhexanoic acid / stearic acid) glyceryl oligoester, stearic acid hydrogenated castor oil, glycerin fatty acid ester such as hydroxystearic acid hydrogenated castor oil, dimer dilinoleic acid Dimer acid esters such as tosteryl / isostearyl / cetyl / stearyl / behenyl), dimer dilinoleate di (isostearyl / phytosteryl), dimer dilinoleate dimer dilinoleyl bisisostearyl, (12-hydroxystearic acid / stearic acid / Rosic acid) dipentaerythritol, hexa (12-hydroxystearic acid / stearic acid / rosinic acid) dipentaerythritol, (12-hydroxystearic acid / isostearic acid) dipentaerythritol, dipentaerythritol fatty acid esters, cholesteryl isostearate Fatty acid cholesteryl esters such as cholesteryl hydroxystearate and cholesteryl ricinoleate, fatty acid phytosteryls such as macadamian nut oil fatty acid phytosteryl And ester and the like, can be used more than those one or.

  Among these, macadamia nut oil fatty acid phytosteryl, N-lauroyl-L-glutamate di (phytosteryl 2-octyldodecyl), hexa (hydroxystearic acid / stearic acid / rosinic acid) dipentaerythrityl, hydroxystearate cholesteryl moisturizes the skin. More preferred for imparting and softening the skin.

  Commercially available products of such component (C) include PLANDOOL MAS (manufactured by Nippon Seika Co., Ltd.), El Dew PS-203 (manufactured by Ajinomoto Co., Inc.), Cosmol 168ARN (manufactured by Nisshin Oillio Group), Saracos HS (Nisshin Oilio) Group company).

  In the present invention, the component (C) used in the present invention can be expected to have an effect of softening the skin mainly by imparting moisture to the skin and imparting moisture to the skin.

  Ingredient (C) preferably has a water-holding power with respect to its own weight of 180% or more, and more preferably 200% or more from the viewpoint of skin softening effect.

  The content of the component (C) is not particularly limited, but is preferably 0.1 to 10%, more preferably 0.1 for imparting moisture after application of the composition and a feeling of firmness of the skin. -7%, more preferably 0.1-5%.

  By making the content (B) + (C) of the total mass of the component (B) and component (C) with respect to the total amount of the oil-in-water emulsion composition in a specific range, the moisture and flexibility of the skin are further improved. It becomes possible. As for such a ratio, (B) + (C) is preferably 1 to 25%, and more preferably 2 to 20%.

  By making content rate (B) / (C) of an above-described component (B) and component (C) into a specific range, it becomes possible to further improve the moisture and softness of skin. (B) / (C) is preferably from 0.05 to 5 from the viewpoint of achieving both firmness and flexibility, and more preferably from 0.5 to 5.

In the present invention, it is preferable to further contain a component (D) phospholipid. Phospholipid is a general term for lipids having a phosphate ester moiety in the structure, and is not particularly limited as long as it is usually used for external preparations for skin or cosmetics. For example, it has a structure in which fatty acid and phosphoric acid are combined with glycerin and sphingosine as the central skeleton, and alcohol is ester-bonded to phosphoric acid. There are roughly two types of phospholipids: glycerophospholipids having glycerin as a skeleton and sphingophospholipids having sphingosine as a skeleton. A molecule in which a fatty acid is ester-bonded to the C1 and C2 positions of glycerin and a phosphoric acid is bonded to the C3 position is called phosphatidic acid, and a molecule in which the fatty acid at the C2 position is removed from phosphatidic acid is called lysophosphatidic acid. In many cases, saturated fatty acid is bonded to C1, and unsaturated fatty acid is bonded to C2. As the type of alcohol, choline, ethanolamine, inositol, serine, glycerin and the like can be taken.
The phospholipid may be a natural product extracted and purified from animals and plants, or may be chemically synthesized, and may be subjected to processing such as hydrogenation, hydroxylation, and enzyme treatment. Examples of natural products include soybean-derived phospholipids and egg yolk-derived phospholipids, and examples of processed products include hydrogenated phospholipids and lysophospholipids. More 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 hydrogen Examples include added lysophospholipids.
Of these, hydrogenated phospholipids are preferable, and soybean-derived hydrogenated phospholipids are more preferable. When hydrogenated phospholipid (preferably derived from soybean) is combined with component (A), component (B) and component (C), there is a good feeling of elasticity, and the feel during and after use is good This is preferable.

Commercially available components (D) include Nikkor Resinol S-PIE, Nikkor Resinol S-10, Nikkor Resinol S-10E (all manufactured by Nikko Chemicals), Basis LS-60HR (Nisshin Oillio Group), HSL -70 (manufactured by YMC), lecithin CLO (manufactured by J-Oil Mills), egg yolk lecithin PL-100P (manufactured by Kewpie) and the like.

  The content of the component (D) used in the oil-in-water emulsion composition of the present invention is 0.1 to 2% from the viewpoint of reducing stickiness at the time of application and the effect in the oil-in-water emulsion composition. preferable.

  In the present invention, such a component (D) mainly gives skin flexibility and can be expected to give a firm feeling after application of the composition.

  On the other hand, the content of the component (A) described above reduces the stickiness due to the component (D) and the hard film feeling due to the component (A) by containing the component (D) at a specific ratio, and the skin is not sticky. Not only can a moderately soft feeling of elasticity be imparted for a long time, but also stability over time is improved. The content mass ratio (A) / (D) of the component (A) and the component (D) is not particularly limited, but is preferably 0.3 to 2, and preferably 0.4 to 1. More preferably.

  The present invention is an oil-in-water emulsion composition and contains water. Here, water is used as a dispersion medium of the product of the present invention, and is not particularly limited as long as it is usually used in a skin external preparation or cosmetic. For example, purified water, distilled water, ion exchange water, tap water , Hot spring water, deep sea water, etc. Although not particularly limited, the content is more preferably 20 to 70% in the oil-in-water emulsion composition.

  In the oil-in-water emulsion composition of the present invention, in addition to the above-mentioned essential components, components used in normal skin external preparations or cosmetics, for example, water-soluble polymers, alcohols, aqueous components such as water, interfaces, etc. An activator, an ultraviolet absorber, a humectant, an antioxidant, a cosmetic ingredient, an antiseptic, a fragrance and the like can be appropriately contained within a range not impairing the effects of the present invention.

  Although the manufacturing method of the oil-in-water type emulsion composition of this invention is not specifically limited, Water and a necessity are added to what mixed component (A)-(D) and other additives as needed. Depending on the case, a mixture of optional components may be added and emulsified.

  The oil-in-water emulsion composition of the present invention is not particularly limited, but examples of the properties include liquid, gel, emulsion, cream, semi-solid, and solid. The product forms include facial cleansing foams, facial cleansing creams, cleansings, massages, packs, skin lotions, milky lotions, creams, serums, makeup bases, sunscreens and other skin cosmetics, foundations, white powder, eye shadows, eye For finishing hair such as liner, mascara, eyebrow, concealer, lipstick, lip balm, hair mist, shampoo, rinse, treatment, hair tonic, hair cream, pomade, tic, liquid hair conditioner, set lotion, hair spray, etc. A composition etc. can be illustrated. Among these, the emulsion applied to the face is an oil-in-water emulsion composition in which the effect of the present invention is easily exerted from the viewpoint that it is easy to realize the effect of imparting firmness to the skin. Moreover, as the usage method, a method of taking an appropriate amount by hand, a method of impregnating a nonwoven fabric or the like, and the like are mentioned.

  The oil-in-water emulsified composition of the present invention thus obtained has the characteristics of imparting moisture to the skin, making the skin soft, excellent in persistence of the firmness, and excellent in stability over time. .

  Before explaining the present invention, the water holding power by the combination of the component (B) and the component (C) will be described in detail with reference to the following examples. Note that these do not limit the present invention.

The water-holding power when the component (B) and the component (C) contained in each sample were combined was evaluated based on the evaluation criteria shown below, and the results are shown in Tables 1 and 2.
(1: Component (B) and component (C) water-holding power of mixture))
The water holding power (%) combining the component (B) and the component (C) contained in each sample was determined based on the following four-step criteria. The ability to hold water is determined according to the following test method.
Test method: 20 g of oil heated to 50 ° C. is weighed in a 200 ml beaker, and 50 ° C. water is gradually added while stirring at 3000 rpm with a desper mixer, and the maximum amount of water that does not drain is measured. The numerical value was divided by 20 and multiplied by 100 to obtain the water holding power.

(B) Four-level evaluation criteria ◎: 250% or more ○: 200% or more and less than 250% Δ: 150% or more and less than 200% ×: less than 150%

The combination of oil agents in oily mixtures 1 to 4 showed a high water holding power of 250% or more. On the other hand, in the oily mixture 5 that does not contain the component (C), the water holding power is as low as 144%, and if the component (B) and the component (C) are not combined, sufficient water holding power cannot be obtained. I understood. In addition, the oily mixtures 6 and 7 not containing the component (B) have a water holding power of 190% and 169%, both of which have a low water holding power, and the water holding power is improved in combination with the component (B). I understood that. Moreover, the oil-based mixtures 8 and 9 which do not contain a component (B) had a water holding power of 501% and 336%, respectively, which was higher than that of the component (B) alone. Furthermore, in the oil-based mixture 11 which combined the component (B) and the oil agent other than the component (C) having a water holding power of 150% or less, the water holding power was a low value of 139%. This suggests that the effect of the present invention cannot be achieved unless the water holding power of the component (C) itself is 150% or more.

The present invention will be described in detail below with reference to examples. Note that these do not limit the present invention. Unless otherwise specified, the content is expressed in mass% with respect to the system containing the component.
Invention products 1 to 21 and comparative products 1 to 6: oil-in-water emulsion composition (milky lotion)
The emulsion was prepared by the composition shown in Tables 3 to 6 and the following production method. After applying the appropriate amount of each sample to the face by 20 panelists specializing in cosmetics evaluation, each of skin firmness (immediately after application), skin flexibility (immediately after application), and moisture retention (5 hours after application) The items were evaluated and determined according to the following evaluation criteria, and the results are shown in Tables 3 to 6. In addition, the water holding power and stability over time of the combination (B) + (C) of the component (B) and the component (C) contained in each sample are also evaluated and determined according to the evaluation criteria shown below. The results are also shown in Tables 3-6.

(Production method)
A: Components (1) to (18) are mixed uniformly at room temperature and heated to 70 ° C.
B: Components (19) to (20) are heated to 70 ° C., added to A and emulsified.
C: After cooling B, components (21) to (26) were added and mixed to obtain an emulsion.

(1: water-holding power of component (B) and component (C)))
The water holding power (%) combining the component (B) and the component (C) contained in each sample was determined based on the following four-step criteria. The ability to hold water is determined according to the following test method.
Test method: 20 g of oil heated to 50 ° C. is weighed in a 200 ml beaker, 50 ° C. water is gradually added while stirring at 3000 rpm with a desper mixer, and the maximum (mass g) at which water does not drain is measured. The numerical value was divided by 20 and multiplied by 100 to obtain the water holding power.

(I) Four-level evaluation criteria (judgment): (Evaluation)
◎: 250% or more ○: 200% or more and less than 250% △: 150% or more and less than 200% ×: Less than 150%

  20 professional evaluators apply each sample of products 1 to 21 of the present invention and comparative products 1 to 6 to maintain the moisture of the skin (after 5 hours of application), skin firmness (immediately after application), and skin A questionnaire was conducted on the flexibility (immediately after application) and evaluated according to the following criteria.

(2: Persistence of moisture on skin (5 hours after application))
(B) Four-level evaluation criteria (judgment): (Evaluation)
A: More than 16 evaluators answered that the skin after 5 hours of application had moisture.
A: 12 to 15 evaluators who answered that there was moisture on the skin after 5 hours of application.
Δ: Eight to eleven evaluators who answered that there was moisture on the skin after 5 hours of application.
X: Seven or less evaluators answered that the skin after 5 hours of application had moisture.

(3: Skin firmness (immediately after application))
(C) Four-level evaluation criteria (judgment): (Evaluation)
A: More than 16 evaluators answered that the skin after application was firm.
A: 12 to 15 evaluators who answered that the skin after application had a firm feeling.
Δ: Eight to eleven evaluators who answered that the skin after application had a firmness.
X: Seven or less evaluators answered that the skin after application had a firm feeling.

(4: Skin flexibility (immediately after application))
(D) Four-level evaluation criteria (judgment): (Evaluation)
A: More than 16 evaluators replied that softness increased on the skin after application.
○: 12 to 15 evaluators who answered that the softness increased on the skin after application.
(Triangle | delta): Eight to eleven evaluators who answered that the softness increased on the skin after application | coating.
X: Seven or less evaluators answered that the softness increased on the skin after application.

(5: Stability over time)
Regarding the evaluation of the temporal stability of the prepared sample, the change in appearance (creaming) of each sample stored in a thermostat at 50 ° C. for one month was visually observed and evaluated according to the following four-stage absolute judgment criteria.

(E) 4-level evaluation criteria (determination): (evaluation)
◎: no creaming observed in 1 month 〇: creaming observed in 1 month △: creaming observed in 2 weeks ×: creaming observed in 1 day

  The oil-in-water emulsion compositions 1 to 21 of the present invention impart moisture to the skin and are excellent in sustainability, soften the skin, impart a firmness, and are excellent in stability over time. On the other hand, Comparative Product 1 containing no component (A) could not be emulsified because it did not contain a surfactant. Comparative products 2 and 3 containing no component (B) had particularly low evaluation of skin firmness and low evaluation of flexibility. In Comparative Product 4 containing no component (C), the moisture retention of the oil agent is low, so that the moisture retention of the skin is inferior, the evaluation of the firmness and softness of the skin is low, and the component (B) is increased. The same was true for comparative product 5. From these results, it was shown that the component (A), the component (B), and the component (C) are essential components in the present invention, and the effects of the invention cannot be obtained even if any of them is missing. Furthermore, in the comparative product 6 containing stearic acid instead of the component (A), a firm film feeling of the back skin was generated, and the firmness was strongly felt, and both the firmness and flexibility were inferior. That is, it was suggested that surfactants other than component (A) N-acylamino acid or a salt thereof cannot provide the effects of the present invention.

Example 1: Oil-in-water emulsion composition (cream for eyes)
(Ingredient) (%)
1. N-stearoyl-L-glutamic acid 0.2
2. Glyceryl stearate 0.3
3. Phytosteryl oleate 1
4). Cholesteryl hydroxystearate 1
5. N-lauroyl-L-glutamate di (cholesteryl / behenyl /
Octyldodecyl) 0.5
6). Tri (capryl / capric acid) glycerin 3
7). Liquid paraffin 3
8). Cetostearyl alcohol 5
9. Heavy liquid isoparaffin (* 1) 2
10. Fragrance 0.3
11. Hydrogenated lecithin 0.1
12 Purified water remaining amount 13. Sandalwood extract 0.1
14 Carboxyvinyl polymer 1
15. Sodium hydroxide 0.35
16. Alkaligenes polysaccharide 0.01
17. Polyvinyl alcohol 4
* 1: Pearl Dream 18 (manufactured by NOF Corporation)

(Production method)
A: Components (1) to (11) are uniformly mixed at room temperature and heated to 70 ° C.
B: The component (12) is heated to 70 ° C., added to A and emulsified.
C: After cooling C to 40 degreeC, component (13)-(17) was added and the cream for eyes was obtained.

  The eye cream of Example 1 was excellent in all items of skin firmness, softness of moisture, softness of skin and stability over time.

Example 2: Oil-in-water emulsion composition (massage cream)
(Ingredient) (%)
1. N-lauroyl-L-glutamic acid 0.2
2. Glyceryl stearate 0.3
3. Phytosteryl oleate 1
4). Macadamia nut oil fatty acid phytosteryl 1
5. N-lauroyl-L-glutamate di (phytosteryl 2-octyldodecyl) 0.5
6). Oleyl oleate 5
7). Liquid paraffin 2
8). Medoform oil 2
9. Hydrogenated lecithin 0.1
10. Purified water remaining amount 11. Alkyl-modified carboxyvinyl polymer 1
12 Triethanolamine appropriate amount 13.1,3-butylene glycol 5
14 Hyaluronic acid 0.1
15. Hydrolyzed collagen 0.1
16. Mucopolysaccharide 0.1
17. Clove extract 0.1

(Production method)
A: Components (1) to (9) are uniformly mixed at room temperature and heated to 70 ° C.
B: Components (10) to (13) are heated to 70 ° C., added to A and emulsified.
C: After cooling C to 40 degreeC, component (14)-(17) was added and the massage cream was obtained.

The massage cream of Example 2 was excellent in all the items of skin firmness, persistence of moisture of skin, softness of skin and stability over time.

Example 3: Oil-in-water emulsion composition (sunscreen cream)
(Ingredient) (%)
1. Myristoyl glutamate Na 0.2
2. Glyceryl stearate 0.3
3. Phytosteryl oleate 1
4). Dimer dilinoleic acid di (isostearyl / phytosteryl) 1
5. Hydrogenated lecithin 2
6). Concentrated glycerin 10
7.1,3-Butylene glycol 5
8). Propylene glycol dicaprate 1
9. Ethyl hexyl methoxycinnamate 7
10. Diglyceryl tetraisostearate 5
11. Dimethylpolysiloxane (* 2) 2
12 Squalane 8
13. Purified water remaining amount 14. Acrylic acid / alkyl methacrylate copolymer 1
15. Carrageenan 1
(* 2) SH200C FLUID 6CS (manufactured by Dow Corning Toray)

(Production method)
A: Components (1) to (12) are uniformly mixed at room temperature and heated to 70 ° C.
B: Components (13) to (14) are heated to 70 ° C., added to A and emulsified.
C: After cooling C to 40 ° C., component (15) was added to obtain a sunscreen cream.

  The sunscreen cream of Example 3 was excellent in all of the items of skin firmness, moisture retention, skin softness and stability over time.

Claims (7)

The following components (A) to (C);
(A) N-acylamino acid or salt thereof (B) Phytosteryl oleate (C) Oil agent having a water-holding power of 150% or more (excluding (B))
Oil-in-water emulsified composition containing   The total content of the component (B) and the component (C) in the oil agent is 1 to 25% by mass with respect to the total amount of the oil-in-water emulsion composition, and the content mass ratio (B) / (C) is 0.05 to 5 The oil-in-water emulsion composition according to claim 1.   The oil-in-water emulsion composition according to claim 1 or 2, further comprising (D) a phospholipid.   The oil-in-water emulsion composition according to any one of claims 1 to 3, wherein the content of (D) phospholipid is 0.1 to 2 mass% with respect to the total amount of the oil-in-water emulsion composition.   The content-mass ratio (A) / (D) of a component (A) and a component (D) is 0.3-2, The oil-in-water type emulsion composition in any one of Claims 1-4   The oil-in-water emulsion composition according to any one of claims 1 to 5, wherein the component (C) is an ester of a fatty acid and a sterol, a higher alcohol, or dipentaerythritol. Claim (C) is macadamia nut oil fatty acid phytosteryl or N-lauroyl-L-glutamate di (phytosteryl 2-octyldodecyl), hexa (hydroxystearic acid / stearic acid / rosinic acid) dipentaerythrityl, cholesteryl hydroxystearate Item 7. The oil-in-water emulsion composition according to any one of Items 1 to 6.