KR100698356B1 - Skin cosmetics - Google Patents

Abstract

It is light in use and quickly penetrates into the skin, so it is not sticky after use and has a long lasting moisturizing effect, and it has excellent skin roughening effect, anti-wrinkle effect, gives skin firmness and excellent stability over time.

(a) As a component, the structural unit which concerns on 2- (meth) acryloyloxyethylphosphorylcholine represented by General formula (1), and the structural unit which concerns on the (meth) acrylic-acid alkylester are contained in molar ratio of 100 / 0-10 / 90. Then, 0.005 to 10% by weight of the copolymer of which the total weight percentage of the two structural units is 60 to 100%, and (b) component is 0.0005 to 2% by weight of dry purslane extract.

(Formula 1)

(Wherein R ¹ is a hydrogen atom or a methyl group, R ² , R ³ and R ⁴ are each an alkyl group having 1 to 8 carbon atoms, n represents an integer of 2 to 4)

Skin, wrinkle suppression, stickiness, rough skin, moisturizing effect, purslane, cosmetic

Description

Skin cosmetics {SKIN COSMETICS}

The present invention relates to cosmetics for skin such as lotion, milky lotion, cream, pack, hair tonic, foundation, etc. In more detail, the use of the skin is light and penetrates into the skin quickly and is not sticky even after use. The present invention relates to a skin cosmetic having excellent roughening effect and wrinkle suppression effect, giving firmness to the skin and excellent stability over time.

In general, the skin surface of a human is covered with a sebaceous membrane, and the evaporation of water is suppressed to an appropriate degree. In addition, maintaining the moisture of the skin in an appropriate range is very important in terms of skin health, and when the moisture is insufficient, it becomes easy to cause skin roughness. When washing or bathing, the sebaceous film is temporarily removed and the skin moisture is easily blown away. Therefore, it is necessary to replenish moisture by using moisturizing cosmetics such as lotion, milk, cream and essence. In general, cosmetics contain polyhydric alcohols such as glycerin, 1,3-butylene glycol, sorbitol, and pyrrolidone carboxylate as moisturizers. These moisturizers have excellent moisture retention under high humidity but low humidity. It is known that it is difficult to maintain the moisturizing effect due to difficulty in retaining moisture and, in some cases, absorbs skin moisture, thereby promoting skin roughness. Therefore, recently, various highly moisturizing ingredients such as chitin, chitosan and derivatives thereof, acidic mucopolysaccharides such as protein hydrolysates and hyaluronic acid, and plant extracts have been proposed as moisturizing ingredients having high moisture retention under low humidity. However, when these moisturizing ingredients are blended into the cosmetic, there is a drawback of having an unpleasant stickiness due to its high moisturizing power. Therefore, as a result of improving the stickiness while maintaining a high moisturizing effect, for example, there is a skin external preparation described in Patent Document 1 that combines mucopolysaccharide and trehalose, but it is not yet possible to suppress the stickiness enough, furthermore, the skin's permeability, skin Sufficient performance has not been obtained regarding the roughening effect, the firming effect on the skin, and the wrinkle suppressing effect.

On the other hand, skin roughening prevention and improvement effect are mentioned as an important function of skin cosmetics. In general, in order to fully exhibit these functions, it is effective to mix the oil with the moisturizer as described above, and it is often used by emulsified formulations such as emulsion, cream and cosmetic liquid. However, in products using oil, the spreadability at the time of use is often worsened or sticky, and there is a problem that it is difficult to solve them. Therefore, Patent Documents 2 and 3, for example, propose a cosmetic which has suppressed stickiness while compensating for blockage of oil by using a specific polymer compound having a phosphorylcholine group in its molecule.

In addition, in order to further enhance the function of skin roughening prevention and improvement effect in cosmetics, various anti-inflammatory agents such as glycidyl acid salts, glycylic acid derivatives, and azulene derivatives are combined with high moisturizing ingredients and vitamins. (Skin cosmetics described in Patent Document 4, skin external preparations described in Patent Documents 5 to 7). However, the present condition is that it is not possible to obtain cosmetics having a good feeling of use and having sufficient skin roughening effect, and furthermore, while effectively suppressing or improving the generation of wrinkles caused by aging or ultraviolet rays, the skin is smooth and firm and moist. No cosmetics having sufficient so-called anti-aging effects at the same time to nourish the fresh skin were obtained.

[Patent Document 1] Japanese Patent Application Laid-Open No. 6-122621

[Patent Document 2] Japanese Patent Application Laid-Open No. 5-70321

[Patent Document 3] Japanese Unexamined Patent Application Publication No. 6-157269

[Patent Document 4] Japanese Patent Application Laid-Open No. 7-277943

[Patent Document 5] Japanese Patent Application Laid-Open No. 6-32728

[Patent Document 6] Japanese Patent Application Laid-Open No. 8-99858

[Patent Document 7] Japanese Patent Application Laid-Open No. 9-241147

The present invention provides a skin cosmetic such as a lotion, latex, cream, pack, hair tonic, foundation, etc. More specifically, the use of the skin is light and penetrates into the skin quickly so that it is not sticky even after use and has excellent durability of the moisturizing effect. The purpose of the present invention is to provide a skin cosmetic having excellent roughness improving effect and wrinkle suppression effect, giving firmness to the skin, and excellent stability over time.

As a result of repeated studies to solve the above problems, it has come to obtain a desired skin cosmetics by combining a specific water-soluble polymer and a specific plant extract in a specific ratio.

That is, the present invention is as follows.

(1) As the component (a), a structural unit according to 2- (meth) acryloyloxyethylphosphorylcholine represented by the formula (1) and a structural unit according to (meth) acrylic acid alkyl ester are selected from 100/0 to 10/90. A skin cosmetic composition comprising a molar ratio of 0.005 to 10% by weight of a copolymer having a total weight of 60 to 100% of the two structural units, and (b) 0.0005 to 2% by weight of a purslane extract as a dry component. .

(Wherein R ¹ is a hydrogen atom or a methyl group, R ² , R ³ and R ⁴ are each an alkyl group having 1 to 8 carbon atoms, n represents an integer of 2 to 4)

(2) The skin cosmetic according to (1), which further contains 0.001 to 10% by weight of an anti-inflammatory agent as the component (c).

The polymer of the component (a) used in the present invention comprises a structural unit according to 2- (meth) acryloyloxyethylphosphorylcholine (PC) represented by the formula (1) and a structural unit according to (meth) acrylic acid alkyl ester 100 It is contained in the molar ratio of / 0-10 / 9O, Preferably it is 100 / 0-30 / 70. More preferably, it is a polymer containing in the molar ratio of 95/5-50/50. If it is less than 10/90, the skin roughening prevention effect is weakened.

In addition, the total weight percentage of the two structural units of PC and (meth) acrylic acid alkyl ester in this polymer is generally 60 to 100%, preferably 70 to 10%, more preferably 80 to 100%. If it is less than 60%, sufficient moisturizing effect and skin roughening prevention effect cannot be obtained. Here, in the case where the combined amount of PC and (meth) acrylic acid alkyl ester in the polymer is not 100% by weight, the compound other than PC and the (meth) acrylic acid alkyl ester is a compound having a double bond capable of addition polymerization, for example, ethylene, Olefinic hydrocarbons such as propylene, butene, isobutene and styrene, and isomerized olefins, multimerized olefins or olefinic compounds having various derivatives introduced therein; Esters with ethylenically unsaturated carboxylic acids such as acrylic acid, methacrylic acid, vinyl acetic acid, itaconic acid, crotonic acid, maleic acid and fumaric acid, and their multimers, anhydrides and alcohols other than monohydric alcohols having 1 to 6 carbon atoms, Or ethylenically unsaturated carboxylic acid derivatives having a carbonyl group, an amino group, a cyano group, a nitrile group, or the like introduced therein; Vinyl alcohols, esters of these and various carboxylic acids, ethers of various alcohols, or ethylenically unsaturated carboxylic acid derivatives having introduced carbonyl groups, amino groups, cyano groups, nitrile groups, vinyl alcohols, and various carboxyl groups Esters with acids, ethers with various alcohols, or vinyl alcohol derivatives in which a carbonyl group, an amino group, a cyano group, a nitrile group, or the like is introduced thereto.

Moreover, as for the molecular weight of this polymer, 10,000-10,00,000 Daltons are preferable, More preferably, it is 50,000-50,000 Daltons.

In PC represented by the formula (1), R ¹ in the formula is a hydrogen atom or a methyl group. Moreover, R <^2> , R <^3> and R <^4> are a C1-C8 alkyl group, for example, a methyl group, an ethyl group, n-propyl group, isopropyl group, etc. are mentioned. R ² , R ³ and R ⁴ may be the same as or different from each other. In addition, n is an integer of 2-4. Particularly preferred PC is 2-methacryloyloxyethylphosphorylcholine, wherein R ¹ , R ² , R ³ and R ⁴ in the formula are methyl groups and n is 2.

The alcohol residue (alkyl group) which comprises a (meth) acrylic-acid alkylester ("(meth) acryl" shows methacrylic or acryl) is C1-C6, Preferably it is C2-C5, More preferably, it is C3 It is -4. Specific examples of the (meth) acrylic acid alkyl esters include methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, methacrylate, isopropyl acrylate, isopropyl methacrylate, and n-butyl acrylate. Can be mentioned.

In addition, the purslane extract of the component (b) used in the present invention is an extract extracted with various solvents from the leaves, stems, roots, flowers, seeds or all of the dicotyledonous plants (mostly herbaceous plants crawling in the flesh of a year) to be. Specifically, for example, Purslane (Portulaca oleracea L), Purslane (Portulaca oleracea L. var. ), Among which purslane or purslane transformation (Portulaca oleracea L. var. Sativa DC) is preferred. 1, which is selected from hydrocarbons, esters, ketones, ethers, halogenated hydrocarbons, alcohols and water after crushing or drying the leaves, stems, roots, flowers, seeds or the whole thereof as necessary. And extraction by heating under reflux or immersion with two or more kinds of solvents. Preferably, one or two kinds of water, ethanol, propylene glycol, isopropyl alcohol, 1,3-butylene glycol, and ethyl acetate It extracted with the above solvent, More preferably, it extracted with water or 1, 3- butylene glycol. In addition, purslane extract referred to in this invention means the extraction solution itself or its concentrate. In addition, the extracts of purslane and the plant are disclosed in Japanese Patent Laid-Open Publication No. 2003-12446 to reduce their irritation, and commercially available products such as Bioland Ltd. "P0TURACA EXTRACT" are available. have.

On the other hand, as an anti-inflammatory agent used in the present invention, for example, glycylizinic acid and its derivatives, glycylezinic acid and its derivatives, allantoin and its derivatives, guiazulene, indomethacin, ketoprofen, pyroxicam, acetaminophen , Aspirin, salicylic acid, bupecsa film, suprofen, ibuprofen piconol, flubiprofen, pranoprofen, diclofenac sodium, sodium salicylate, methyl salicylate, benzadak, felbinac, ufenamaart, hydrocortisone, prednis Zolone, diphenhydramine hydrochloride, a licorice extract, a propolis extract, etc. are mentioned. Among these, preferred is one or two or more components selected from glycylizinic acid and its derivatives, glycylezinic acid and its derivatives, allantoin and its derivatives, and guazulene, and more preferably glycylic acid and its derivatives, glyco 1 or 2 or more components selected from silicic acid and its derivatives, allantoin and its derivatives. Derivatives of glycylic acid include dipotassium glycylideate, monopotassium glycylate, and monoammonium glycylate, and derivatives of glycylideic acid include stearyl glycylsinate, glycyletinyl glycylate, 3 Succinyloxyglycileic acid dibasic sodium and the like, and derivatives of allantoin include allantoin chlorhydroxyaluminum and allantoindihydroxyaluminum.

And the component (a) of the present invention is 0.01 to 10% by weight, preferably 0.01 to 7% by weight, more preferably 0.01 to 5% by weight in the total amount of the composition. If it is less than 0.005% by weight, the persistence of the moisturizing effect, the roughening effect of the skin, and the anti-wrinkle effect are weakened. If the content is more than 10% by weight, the feeling of use is heavy, the stickiness after use is severe, and there may be a lack of stability over time.

Component (b) of the present invention is contained in a total weight of 0.0005 to 2% by weight, preferably 0.001 to 2% by weight, more preferably 0.001 to 1% by weight in dry weight. If less than 0.0005% by weight, the skin permeability worsens, while skin roughening improvement effect, wrinkle suppression effect, firming effect on the skin is weakened, and when it exceeds 2% by weight, the stability is deteriorated.

However, the dry weight as used in the present invention generally refers to the weight of the residue when the extract is dried at 105 ° C. to remove the solvent when the extraction solvent is volatile, while gas chromatography is used when the extraction solvent is nonvolatile. From the value of quantifying the amount of solvent by high-performance liquid chromatography or the like, the mass is calculated as a calculated value and regarded as dry weight.

Moreover, in this invention, in order to further improve skin roughening effect and wrinkle suppression effect, it is preferable to contain 0.001-10 weight% of component (c) in whole composition, More preferably, it is 0.01-5 weight%. If it is less than 0.01% by weight, the addition effect may not be obtained well, and if it exceeds 10% by weight, it may be sticky or cause a problem in stability, and it is disadvantageous in terms of cost.

Moreover, it is also possible to mix | blend the skin cosmetics of this invention with the additive generally used for cosmetics in the range which does not impair the performance of the skin cosmetics of this invention. Lower alcohols such as ethanol and isopropyl alcohol, polypropylene alcohols such as propylene glycol, dipropylene glycol, glycerin, diglycerin, 1,3-butylene glycol, polyethylene glycol, sorbitol, maltitol, isomaltitol, lactose, fructose, Sugars such as sucrose, maltose or derivatives thereof, trehalose (α, α-trehalose, α, β-trehalose, β, β-trehalose) or derivatives thereof, glycosyltrehalose or derivatives thereof, isomalt oligosaccharides, liquid paraffin, flow Hydrocarbon oils such as isoparaffin, squalane, petrolatum, and solid paraffin; natural fats and oils such as tallow, pork, and fish oil; fatty acids such as lauline acid, myristic acid, palmitic acid, stearic acid, and oleic acid; Synthetic triglycerides such as glyceryl ethylhexanoate, isopropyl myristic acid, isopropyl palmitate, cetyl palmitate, ethyl oleate, oleic oleate, myristic Ester oils such as acid octyldodecyl, waxes such as beeswax and carnava wax, silicone derivatives such as high polymerization dimethylpolysiloxane, polyether modified dimethylpolysiloxane, amino modified dimethylpolysiloxane, ceramides, cholesterol, protein derivatives, lanolin and lanolin derivatives , Anionic surfactants such as oily bases such as lecithin, soaps, acylmethyltaurine salts and amide ether sulfate ester salts, amphoteric surfactants such as amideamino acid salts and amidepropyldimethylamino acetic acid betaine, polyoxyethylene alkyl ethers and polyethylene Fatty acid esters of glycols, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene hardened castor oil, polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, glycerin mono fatty acid esters, alkylpolyglucosides, eggs Nonionic surfactants such as nolamide, cationic surfactants such as alkyltrimethyl ammonium chloride, semipolar surfactants such as alkyldimethylamine oxide, alginic acid, carboxyvinyl polymer, carboxymethylcellulose, hydroxypropylmethylcellulose, hydroxyethyl Water-soluble polymers such as cellulose, xanthan gum and pullulan, organic or inorganic salts such as pyrrolidonecarboxylic acid salts, citric acid salts, malic acid salts, salts, acids and alkalis which are pH regulators, fungicides, chelating agents, antioxidants, Circulatory accelerators, ultraviolet absorbers, ultraviolet scatterers, natural extracts from plants and animals, ascorbic acid and derivatives thereof, flavonoids and derivatives thereof such as rutin, hesperidin, anthocyanin, vitamins, amino acids, photosensitizers, pigments, pigments, Fragrance | flavor etc. can be mix | blended.

<Example>

Next, the present invention will be described in more detail with reference to Examples.

Example  1-3 and Comparative example  One

The skin cosmetic which is a transparent or translucent lotion shown in Table 1 was prepared, and seven evaluation items were evaluated according to the following evaluation criteria. However, the five components shown in Table 2 were used as a common addition component. In Table 1, the active ingredient in parentheses is the ratio of the desired effective component (component (a) in PC polymer 1) contained therein, for example, when each component such as PC polymer 1 described in the left column of the table is used. The weight% represents the weight% of each component of (a), (b) and (c) contained in the aqueous solution. For example, in Example 1, as shown in the middle column, 1% by weight of PC polymer 1 is used as the component (a), and the PC polymer containing the component (a) is represented by the (active component: 40% by weight), 40% by weight of the component (a), and the component (a) actually used in Example 1 is 1 × 0.4 = 0.4% by weight. The components (a), (b) or (c) actually included in this manner are described in parentheses in each column.

The results are shown in Table 1.

Note 1; "Lipidure-HM" (manufactured by Nippon Yushi Co., Ltd.) "40% by weight aqueous solution containing a polymer having a weight average molecular weight of about 80,000 in a composition of 100% by weight of MPC"

Note 2; "Lipidure-PMB" (manufactured by Nippon Yushi Co., Ltd.) "Aqueous solution containing 5% by weight of polymer having a weight average molecular weight of about 600,000 at a composition ratio of 80% by weight of MPC and 20% by weight of butyl methacrylate"

(MPC: 2-methacryloyloxyethylphosphorylcholine)

Note 3; "POTURACA EXTRACT" (Bioland company Lot.NMP-L-150603)

Note 4; "POTURACA EXTRACT" (Bioland company Lot.NMP-L-202223)

Note 5; Glycylyzine K2 (Maruzen Seiyaku, Inc.)

Note 6; "Allantoin" (Kawaken Fine Chemicals Co., Ltd.)

<Common Additives> Ingredient Name Added amount (% by weight) One  Trisodium trihydrate, dihydrate 0.3 2  Cuenoic Acid, Monohydrate 0.1 3  ethanol 3 4  Methylparaben 0.1 5  Phenoxyethanol 0.2 Sum 3.7

Evaluation item and evaluation standard

(1) texture at the time of use

Twenty women (21 to 35 years old) were used as a panel to determine the feeling of using skin cosmetics (about 2 g) after cleansing as follows.The average value of 20 people was obtained. It evaluated by cosmetics.

2 points | pieces: When it feels non-sticky and good permeability to skin,

1 point: It feels a little sticky when used or it feels a little badly permeable to skin.

Score 0: When there is stickiness at the time of use or feels poor permeability to the skin

(2) stickiness after use

Twenty women (21 to 35 years old) were used as a panel to determine the skin texture after 10 minutes using the skin cosmetics (about 2 g) after washing, and the average value of 20 people was determined. It evaluated as cosmetics with no stickiness.

2 points | pieces: When it feels that skin is not sticky

1 point: When skin feels a little sticky

0 points: when skin feels very sticky

(3) persistence of moisturizing effect

A panel of 20 women (21-35 years old) was used to determine the moisturizing effect of the skin after 2 hours using the skin cosmetics (about 2g) after washing.The average value of 20 people was obtained and the average value was 1.5 or more. It was evaluated as a cosmetic having good sustainability.

2 points | pieces: When skin feels moist enough immediately after use and does not change.

1 point: When the skin feels lacking in moisture compared to immediately after use

0 points: When the skin feels lacking in moisture compared to immediately after use

(4) skin roughening effect

A panel of 10 women (24-34 years old) who are experiencing skin roughness was subjected to sensory examination on the condition of the skin when skin cosmetics were used twice a day for 2 weeks. The average value of 1.5 points or more was evaluated as a cosmetic having a skin roughening effect.

2 points | pieces: When skin roughness feels obviously improved

1 point: When skin roughness felt a little better

0 points: when skin roughening improvement did not feel better at all

(5) anti-wrinkle effect

A panel of 20 women (21-35 years old) was used for the skin condition when skin cosmetics were used twice a day for two weeks, and the sensory examination was made as follows. The average value of 20 people was obtained and the average value was 1.5 points. The above was evaluated with the cosmetics excellent in the wrinkle suppression effect.

2 points | pieces: When you feel that a wrinkle is no longer outstanding.

1 point: If you feel that the wrinkles become less noticeable

0 points: When there is no wrinkle suppression effect at all

(6) firmness of skin

A panel of 20 women (21-35 years old) was used for the skin condition when skin cosmetics were used twice a day for two weeks. The sensory test was made as follows. The average value of 20 people was obtained and the average value was 1.5. More than the point was evaluated as a cosmetic having the effect of firming the skin.

2 points | pieces: When you feel that the skin is feeling firmly

1 point: when skin feels firmer

Score 0: The skin feels not firm at all

(7) stability over time

The cosmetic was sealed in a transparent glass container and stored at 0 ° C, 25 ° C, and 40 ° C for 3 months, and the appearance was observed and evaluated in three steps as follows.

○: Good stability (no change in appearance at any temperature)

(Triangle | delta): Slightly poor stability (Some changes in appearance may cause precipitation or some coloring at some temperature.)

X: Poor stability (There is a change in appearance at a certain temperature, causing sedimentation or separation, or coloring is remarkable)

From Examples 1 to 3, all of the lotions using the components of the present invention have a good feeling at the time of use, are not sticky even after use, have excellent sustainability of moisturizing effect, improve skin roughness effect, suppress wrinkle effect and firm skin It also gave excellent stability over time. On the other hand, in Comparative Examples 1 and 2, sufficient performance was not obtained. That is, in Comparative Example 1, the component (a) was not blended, so that the persistence of the moisturizing effect, the skin roughening improvement effect, and the wrinkle suppressing effect were insignificant. In Comparative Example 2, the component (b) was not blended, resulting in a feeling of use and roughness of the skin. It can be estimated that the effect of improving the burden and suppressing wrinkles is weak, and the effect of firming the skin is weak.

Example  4 to 6, Comparative example  3, 4

The skin cosmetic which is an emulsion of the oil-in-water type shown in Table 3 was prepared, and it evaluated by the method similar to Examples 1-3. However, 14 components shown in Table 4 were used as a common addition component. In addition, the meaning of each term shown in Table 3 is the same as that of Table 1 mentioned above.

The results are shown in Table 3.

Note 1; "Lipidure-HM" (manufactured by Nippon Yushi Co., Ltd.) "40% by weight aqueous solution containing a polymer having a weight average molecular weight of about 80,000 in a composition of 100% by weight of MPC"

Note 2: "Lipidure-PMB" (manufactured by Nippon Yushi Co., Ltd.) "Aqueous solution containing 5% by weight polymer having a weight average molecular weight of about 600,000 at a composition ratio of 80% by weight MPC and 20% by weight butyl methacrylate"

Note 3; "POTURACA EXTRACT" (Bioland company Lot.NMP-L-150603)

Note 4; "POTURACA EXTRACT" (Bioland company Lot.NMP-L-202223)

Note 5; Glycylyzine K2 (Maruzen Seiyaku, Inc.)

Note 6; "Allantoin" (Kawaken Fine Chemicals Co., Ltd.)

<Common Additives> Ingredient Name Added amount (% by weight) One  Xanthan Gum (Dainippon Seiyaku Co., Ltd. "Eco Gum T") 0.1 2  Carboxyvinyl polymers ("Carbopol 940" from BF-GoodRich) 0.12 3  L-arginine 0.1 4  ethanol 5 5  Refined sunflower oil 5 6  Squalene 2 7  glycerin 2 8  Dipropylene glycol 4 9  Monostearic Acid Polyethyleneglycol (1540) 0.5 10  Polyoxyethylene (20 mol) stear ether 0.7 11  Lipophilic Glycerin Monostearate One 12  Methylparaben 0.1 13  Butyl Paraben 0.05 14  Phenoxyethanol 2 Sum 20.87

From Examples 4 to 6, all of the emulsions using the components of the present invention had a good feeling at the time of use and were not sticky even after use. It also showed excellent stability over time. On the other hand, in Comparative Examples 3 and 4, sufficient performance was not obtained. That is, in Comparative Example 3, the component (a) was not blended, so that the persistence of the moisturizing effect, the skin roughening improvement effect, and the wrinkle suppression effect were weak. Skin roughness improvement effect, wrinkle suppression effect, the firmness of the skin seems to be weak.

Example  7, 8

The skin cosmetic which is a cream of the oil-in-water type | mold shown in Table 5 was prepared, The evaluation items (1)-(6) were tested by the method of Examples 1-3, and the following test about the stability with time of evaluation item (7) Evaluation was performed by. However, 13 components shown in Table 6 were used as a common addition component. In addition, the meaning of each term shown in Table 5 is as Table 1 mentioned above.

The results are shown in Table 5.

Note 1; "Lipidure-HM" (manufactured by Nippon Yushi Co., Ltd.) "40% by weight aqueous solution containing a polymer having a weight average molecular weight of about 80,000 in a composition of 100% by weight of MPC"

Note 2; "Lipidure-PMB" (manufactured by Nippon Yushi Co., Ltd.) "Aqueous solution containing 5% by weight of polymer having a weight average molecular weight of about 600,000 at a composition ratio of 80% by weight of MPC and 20% by weight of butyl methacrylate"

Note 3; "POTURACA EXTRACT" (Bioland company Lot.NMP-L-150603)

Note 4; "POTURACA EXTRACT" (Bioland company Lot.NMP-L-202223)

Note 5; Glycylyzine K2 (Maruzen Seiyaku, Inc.)

Note 6; "Allantoin" (Kawaken Fine Chemicals Co., Ltd.)

Note 7; "Siogretinol" (Maruzen Seiyaku Co., Ltd.)

<Common Additives> Ingredient Name Added amount (% by weight) One  Refined Olive Oil 6 2  Squalene 2 3  Dimethyl Polysiloxane (100CS) One 4  Decamethylpentacyclosiloxane 3 5  Refined beeswax 3 6  glycerin 2 7  Dipropylene glycol 3 8  Monostearic acid polyoxyethylene (3.mol) sorbitan One 9  Monostearic acid polyethylene glycol (4000) One 10  Lipophilic Glycerin Monostearate 2 11  Methylparaben 0.2 12  Propylparaben 0.1 13  Butyl Paraben 0.1 Sum 24.4

(7) stability over time

The state of the cosmetics sealed in a transparent glass container and preserve | saved for 1 month at -5 degreeC, 25 degreeC, and 45 degreeC was investigated, and it evaluated by the following three steps.

○: Good stability (no change in appearance at any temperature, no grains, etc.)

(Triangle | delta): Slightly poor stability (Slight sedimentation or some segregation occurs at a certain temperature.

X: Poor stability (obvious sedimentation or separation at certain temperatures)

The creams of the present invention from Examples 7 and 8 were not sticky even after use because they all had good texture. The moisturizing effect was excellent. The stability was also excellent.

Example  9, 10

The skin cosmetic which is a cream of the water-in-oil type shown in Table 5 was prepared, and it evaluated by the evaluation method shown in Example 7, 8. However, 11 components shown in Table 7 were used as a common addition component.

<Common Additives> Ingredient Name Added amount (% by weight) One  Purified Jojoba Oil 2 2  Refined sunflower oil 4 3  Dimethyl Polysiloxane (100CS) One 4  Decamethylpentacyclosiloxane 3 5  Squalene 3 6  Monoolefin Glycerin 1.5 7  Monoolefinic Acid Diglycerin 0.2 8  Methylparaben 0.2 9  Propylparaben 0.1 10  Butyl Paraben 0.1 11  Magnesium sulfate (hexahydrate) 0.5 Sum 15.6

From the results of Examples 9 and 10, all of the creams of the present invention were good in use and not sticky even after use, and were excellent in sustaining moisturizing effect, improving skin roughness, and suppressing wrinkles, and firming the skin. It also showed good stability over time.

According to the present invention, a polymer containing a structural unit according to 2- (meth) acryloyloxyethylphosphorylcholine represented by the formula (1), a structural unit according to an alkyl ester of (meth) acrylic acid and a purslane extract are combined at a specific ratio. It is light in texture and penetrates into the skin quickly, so it is not sticky even after use, and it has excellent durability of moisturizing effect, improves roughness of skin, suppresses wrinkles, gives skin firmness and stability over time. It is possible.

As described above, the skin cosmetic of the present invention is not sticky even after use because it has a good feeling at the time of use, it is excellent in the persistence of the moisturizing effect, improves the roughness of the skin, has an excellent anti-wrinkle effect, and gives firmness to the skin over time and stability. As an excellent skin cosmetic, the influence on this industry is large.

Claims (2)

(a) As a component, the structural unit which concerns on 2- (meth) acryloyloxyethylphosphorylcholine represented by General formula (1), and the structural unit which concerns on the (meth) acrylic-acid alkylester are contained in molar ratio of 100 / 0-10 / 90. And 0.005 to 10% by weight of the dry weight of the purslane extract as a component (b) of 0.005 to 10% by weight of a copolymer having a total weight of 60% to 100% of the two structural units. (Formula 1)

(Wherein R ¹ is a hydrogen atom or a methyl group, R ² , R ³ and R ⁴ are each an alkyl group having 1 to 8 carbon atoms, n represents an integer of 2 to 4) The method according to claim 1, further comprising 0.001 to 10% by weight of one or two or more anti-inflammatory agents selected from the group consisting of glycidyl acid and its derivatives, glycidyl acid and its derivatives, allantoin and derivatives thereof as (c) component. Skin cosmetics, characterized in that.