JP2006151834A - Skin cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin cosmetic giving light feeling in use, quickly fitting to the skin, free from stickiness after use, keeping the moisturizing effect for a long period, having excellent effect for improving roughened skin and suppressing wrinkles, giving springiness to the skin and having excellent time stability. <P>SOLUTION: The skin cosmetic contains (a) a copolymer containing a constitutional unit based on 2-(meth)acryloyloxyethyl phosphorylcholine expressed by formula (I) (R<SP>1</SP>is H or methyl; R<SP>2</SP>, R<SP>3</SP>and R<SP>4</SP>are each a 1-8C alkyl; and n is an integer of 2-4) and a constitutional unit based on an alkyl (meth)acrylate at a molar ratio of 100/0 to 10/90 and total amount of both constitutional units of 60-100 wt.% in the copolymer and (b) an extract of Portulaca oleracea. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to skin cosmetics such as skin lotions, emulsions, creams, packs, hair tonics, foundations, and the like. More specifically, the skin feels light when used and quickly adapts to the skin. The present invention relates to a skin cosmetic that is excellent in properties, has an effect of improving skin roughness, has an effect of suppressing wrinkles, gives skin elasticity, and has excellent temporal stability.

  Usually, the surface of human skin is covered with a sebum film, and the transpiration of water is moderately suppressed. Keeping the skin moisture within an appropriate range is very important from the viewpoint of skin health. If the moisture is insufficient, rough skin and the like are likely to occur. If you wash your face or bath, the sebum film will be temporarily removed and it will be easy to lose the moisture of your skin, so it is necessary to supplement the moisture with moisturizing cosmetics such as lotion, milky lotion, cream, and beauty serum. . Here, in general, cosmetics are blended with polyhydric alcohols such as glycerin, 1,3-butylene glycol, sorbitol, pyrrolidone carboxylate, and the like as moisturizers. Although it has excellent holding power, it has difficulty in holding water under low humidity, and it can not only maintain the moisturizing effect, but it also absorbs moisture from the skin in some cases and promotes rough skin. It has been known. Therefore, in recent years, various highly moisturizing ingredients such as chitin, chitosan and their derivatives, protein hydrolysates, acidic mucopolysaccharides such as hyaluronic acid, plant extracts and the like have been proposed as moisturizing ingredients with high moisture retention at low humidity. ing. However, when these moisturizing ingredients are blended in cosmetics, there is a drawback that they have an unpleasant stickiness due to their high moisturizing power. Therefore, as an example of improving the stickiness while maintaining a high moisturizing effect, for example, there is a skin external preparation described in Patent Document 1 in which mucopolysaccharide and trehalose are combined, but the stickiness can still be sufficiently suppressed. In addition, sufficient performance was not obtained with regard to skin conformability, skin roughness improvement effect, skin elasticity effect, wrinkle suppression effect, and the like.

  On the other hand, as an important function of the skin cosmetic, there is an effect of preventing and improving rough skin. Here, in order to fully exhibit these functions, it is effective to blend oil with a moisturizer as described above, and it is used in an emulsified dosage form such as a milky lotion, cream, or cosmetic liquid. There are many cases. However, products using oil often suffer from poor spread and stickiness during use, and there is a problem that it is difficult to solve these problems. Therefore, for example, Patent Documents 2 and 3 propose cosmetics that compensate for the occlusion of an oil component and suppress stickiness by using a specific polymer compound having a phosphorylcholine group in the molecule.

In cosmetics, various anti-inflammatory agents such as glycyrrhizinate, glycyrrhetinic acid derivatives, and azulene derivatives are also tried to be added together with ingredients with high moisturizing effect and vitamins for the purpose of preventing rough skin and enhancing the function. (Skin cosmetics described in Patent Document 4, skin external preparations described in Patent Documents 5 to 7). However, it is the present situation that cosmetics that have a satisfactory feeling of use and have a sufficient rough skin improvement effect have not been obtained, and moreover, wrinkles caused by aging, ultraviolet rays, etc. can be effectively suppressed. Cosmetics having sufficient effects of preventing skin aging, such as improving and smoothing the skin to prepare a youthful skin with moisture and moisture, have not been obtained.
JP-A-6-122621 Japanese Patent Laid-Open No. 5-70321 JP-A-6-157269 Japanese Unexamined Patent Publication No. 7-277743 JP-A-6-32728 JP-A-8-99858 JP-A-9-241147

  The present invention provides skin cosmetics such as lotions, emulsions, creams, packs, hair tonics, foundations and the like. More specifically, the skin feels light when used and quickly adapts to the skin. An object of the present invention is to provide a skin cosmetic that is excellent in the persistence of the skin, is excellent in the effect of improving the rough skin, is excellent in the effect of suppressing wrinkles, is applied to the skin, and is excellent in stability with time.

  As a result of researches to solve the above-mentioned problems, a target skin cosmetic was obtained 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 based on 2- (meth) acryloyloxyethyl phosphorylcholine represented by the formula (I) and a structural unit based on an alkyl (meth) acrylate ester are 100/0 to 10 / 0.005 to 10% by weight of a copolymer comprising 90 to 100% of the total weight% of both constitutional units, and 0.0005 to 2 in terms of dry weight as a component (b) A skin cosmetic characterized by containing% by weight.

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

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

  According to the present invention, a polymer containing a structural unit based on 2- (meth) acryloyloxyethyl phosphorylcholine represented by formula (I) and a structural unit based on a (meth) acrylic acid alkyl ester; By combining at a specific ratio, it feels light and feels comfortable when used, and is non-sticky after use, has excellent moisturizing effect, excellent skin roughness improvement effect, wrinkle suppression effect, and gives skin firmness It is possible to provide a skin cosmetic excellent in stability over time.

  The polymer of component (a) used in the present invention comprises a structural unit based on 2- (meth) acryloyloxyethyl phosphorylcholine (PC) represented by formula (I) and a structural unit based on (meth) acrylic acid alkyl ester. The polymer is contained in a molar ratio of 100/0 to 10/90, preferably 100/0 to 30/70, and more preferably 95/5 to 50/50. If it is less than 10/90, the effect of preventing rough skin is weakened.

  And the total weight% of both structural units of PC and (meth) acrylic-acid alkylester in this polymer is 60-100% normally, Preferably it is 70-100%, More preferably, it is 80-100%. . If it is less than 60%, sufficient moisturizing effect persistence and rough skin 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, components other than PC and (meth) acrylic acid alkyl ester include addition-polymerizable double bonds. For example, olefinic hydrocarbons such as ethylene, propylene, butene, isobutene, and styrene, and isomerized olefins, multimerized olefins, or olefinic compounds obtained by introducing various derivatives thereof; acrylic acid, methacrylic acid, Acid, vinyl acetic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid and other ethylenically unsaturated carboxylic acids and their multimers, anhydrides, esters with alcohols other than monohydric alcohols having 1 to 6 carbon atoms, or Introduce a carbonyl group, amino group, cyano group, nitrile group, etc. Ethylenically unsaturated carboxylic acid derivatives; vinyl alcohol and esters thereof with various carboxylic acids, ethers with various alcohols, or ethylenically unsaturated carboxylic acids into which a carbonyl group, amino group, cyano group, nitrile group or the like has been introduced Derivatives, vinyl alcohol and esters of these with various carboxylic acids, ethers with various alcohols, or vinyl alcohol derivatives in which a carbonyl group, amino group, cyano group, nitrile group, or the like is introduced.

  The molecular weight of the polymer is preferably 10,000 to 10,000,000 daltons, more preferably 50,000 to 5,000,000 daltons.

In the PC represented by the formula (I), 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, and examples thereof include a methyl group, an ethyl group, an n-propyl group, and an isopropyl group. R ² , R ³ and R ⁴ may be the same or different. Moreover, n is an integer of 2-4. Particularly preferred PC is 2-methacryloyloxyethyl phosphorylcholine in which R ¹ , R ² , R ³ and R ⁴ are methyl groups and n is 2.

  The alcohol residue (alkyl group) constituting the (meth) acrylic acid alkyl ester ("(meth) acryl" represents methacryl or acryl) has 1 to 6 carbon atoms, preferably 2 to 5 carbon atoms, and more Preferably it is C3-C4. Specific examples of the (meth) acrylic acid alkyl ester include, for example, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, n-butyl acrylate, and the like. Is mentioned.

  In addition, (b) component purslane extract used in the present invention is a leaf, stem, root, flower, seed, or whole of a dicotyledonous plant of the genus purslane (generally herb that is succulent with succulents of annual grass). It is an extract extracted from grass with various solvents. Specifically, for example, purslane (Portulaca oleracea L), Tachisubihiyu (Portulaca oleracea L. var. Willd) and the like, but among them, the purslane or the prickly purse are preferred. After these leaves, stems, roots, flowers, seeds or whole plants are crushed or dried as necessary, hydrocarbons, esters, ketones, ethers, halogenated hydrocarbons, alcohols And extraction by heating under reflux or immersion with one or more solvents selected from water, preferably 1 of water, ethanol, propylene glycol, isopropyl alcohol, 1,3-butylene glycol, and ethyl acetate. Extracted with seeds or two or more solvents, more preferably extracted with water or 1,3-butylene glycol. In addition, the purslane extract referred to in the present invention refers to the extraction solution itself or a concentrate thereof. In addition, this extract of the genus Euphorbiaceae is shown in Japanese Patent Application Laid-Open No. 2003-12446 to reduce its irritancy when used in combination with an irritant component, and is commercially available as Bioland Ltd. There is "POTURACA EXTRACT" made by.

  On the other hand, the anti-inflammatory agent used in the present invention includes, for example, glycyrrhizic acid and its derivatives, glycyrrhetinic acid and its derivatives, allantoin and its derivatives, guaiazulene, indomethacin, ketoprofen, pyrosiquicam, acetaminophen, aspirin, salicylic acid, buphemaxak, suprofen , Ibuprofen piconol, flurbiprofen, pranoprofen, diclofenacnutrim, sodium salicylate, methyl salicylate, benzadac, felbinac, ufernamate, hydrocortisone, prednisolone, diphenhydramine hydrochloride, licorice extract, propolis extract and the like. Among them, preferred are glycyrrhizic acid and its derivatives, glycyrrhetinic acid and its derivatives, allantoin and its derivatives, one or more components selected from guaiazulene, and more preferred are glycyrrhizic acid and its derivatives, glycyrrhetinic acid And one or more components selected from the derivatives thereof, allantoin and the derivatives thereof. Derivatives of glycyrrhizic acid include dipotassium glycyrrhizinate, monopotassium glycyrrhizinate, monoammonium glycyrrhizinate, and derivatives of glycyrrhetinic acid include stearyl glycyrrhetinate, glycyrrhetinyl glycyrrhetinate, disodium 3-succinyloxyglycyrrhetinate, and allantoin. Examples of the derivatives include allantoinchlorohydroxyaluminum and allantoindihydroxyaluminum.

  And the (a) component of this invention is 0.005-10 weight% in a composition whole quantity, Preferably it is 0.01-7 weight%, More preferably, it is 0.01-5 weight%. If it is less than 0.005% by weight, the durability of the moisturizing effect, the effect of improving rough skin, and the effect of suppressing wrinkles are weakened. If it exceeds 10% by weight, the feel during use is heavy, the stickiness after use becomes strong, and the stability over time is improved. It may be missing.

  The component (b) of the present invention is contained in the total amount of the composition by 0.0005 to 2% by weight, preferably 0.001 to 2% by weight, and more preferably 0.001 to 1% by weight. When the amount is less than 0.0005% by weight, the conformability to the skin is deteriorated, and the effect of improving the skin roughness, the effect of suppressing wrinkles and the effect of giving the skin are weakened, and when the amount exceeds 2% by weight, the stability is deteriorated.

  However, the dry weight as used in the present invention refers to the weight of the residue when the extract is usually dried at 105 ° C. and the solvent is removed when the extract solvent is volatile, while the extract solvent is non-volatile. In the case of sexuality, the dissolved mass is obtained as a calculated value from the value obtained by quantifying the amount of solvent by gas chromatography, high performance liquid chromatography or the like, and is regarded as the dry weight.

  Moreover, in this invention, it is preferable to contain 0.001-10 weight% of (c) component in the composition whole quantity for the further improvement of the rough skin improvement effect and a wrinkle suppression effect, More preferably, 0.01- 5% by weight. If the amount is less than 0.01% by weight, the effect of addition may be difficult to obtain. If the amount exceeds 10% by weight, stickiness or a problem in stability is caused, and the cost is disadvantageous.

  In addition, it is also possible to mix | blend the additive normally used for cosmetics with the skin cosmetics of this invention in the range which does not impair the performance of the skin cosmetics of this invention. For example, lower alcohols such as ethanol and isopropyl alcohol, propylene glycol, dipropylene glycol, glycerin, diglycerin, 1,3-butylene glycol, polyhydric alcohols such as polyethylene glycol, sorbitol, maltitol, and isomaltitol, lactose, fructose , Sucrose, maltose or derivatives thereof, trehalose (α, α-trehalose, α, β-trehalose, β, β-trehalose) or derivatives thereof, glycosyl trehalose or derivatives thereof, sugars such as isomaltoligosaccharide, liquid paraffin, fluid Hydrocarbon oils such as isoparaffin, squalane, petrolatum, solid paraffin, natural fats such as beef tallow, lard, fish oil, fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, tri-2-ethyl Synthetic triglycerides such as glyceryl sanate, isopropyl myristate, isopropyl palmitate, cetyl palmitate, ethyl oleate, oleyl oleate, octyldodecyl myristate, waxes such as beeswax and carnauba wax, highly polymerized dimethylpolysiloxane , Silicone derivatives such as polyether-modified dimethylpolysiloxane and amino-modified dimethylpolysiloxane, ceramides, cholesterol, protein derivatives, lanolin, lanolin derivatives, oily bases such as lecithin, soaps, acylmethyl taurine salts, amide ether sulfates, etc. Anionic surfactants, amide amino acid salts, amphoteric surfactants such as amidopropyldimethylaminoacetic acid betaine, polyoxyethylene alkyl ether, polyethylene glycol fat Nonionic surfactants such as acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene hydrogenated castor oil, polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, glycerin monofatty acid esters, alkylpolyglucosides, alkanolamides Agents, cationic surfactants such as alkyltrimethylammonium chloride, semipolar surfactants such as alkyldimethylamine oxide, water solubility such as alginic acid, carboxyvinyl polymer, carboxymethylcellulose, hydroxypropylmethylcellulose, hydroxyethylcellulose, xanthan gum, pullulan Polymers, organic or inorganic salts such as pyrrolidone carboxylate, citrate, malate, sodium chloride, acids as pH adjusters And alkalis, bactericides, chelating agents, antioxidants, blood circulation promoters, UV absorbers, UV scattering agents, natural extracts derived from animals and plants, ascorbic acid and its derivatives, flavonoids such as rutin, hesperidin, anthocyanins and their derivatives, Vitamins, amino acids, photosensitizers, dyes, pigments, and fragrances can be blended.

  Next, the present invention will be described in more detail by way of examples.

Examples 1 to 3 and Comparative Examples 1 and 2
Skin cosmetics that are transparent or translucent lotions shown in Table 1 were prepared, and seven evaluation items were evaluated according to the following evaluation criteria. However, the five components shown in Table 2 were used as common additive components. In Table 1, the effective amount in parentheses shown in each left column is, for example, when each component such as PC polymer 1 shown in the left column of the table is actually used. It refers to the proportion of effective desired components (in the PC polymer 1, component (a)), and the weight% indicates the weight% of each component (a), (b) and (c) contained in the aqueous solution. ing. For example, in Example 1, as shown in the middle column, 1% by weight of the PC polymer 1 is used as the component (a), but the PC polymer containing the component (a) The effective component is 40% by weight), and 40% by weight of the component (a) is contained. The component (a) actually used in Example 1 is 1 × 0.4 = 0.4% by weight. Such (a), (b) or (c) component actually contained is indicated in parentheses in each column.

  The results are shown in Table 1.

Note 1: “Lipidure-HM” (manufactured by NOF Corporation) “Aqueous solution containing 40% by weight of polymer having a weight average molecular weight of about 80,000 with MPC of 100% by weight”
Note 2: “Lipidure-PMB” (manufactured by NOF Corporation) “Aqueous solution containing 5% by weight of polymer having a weight average molecular weight of about 600,000 with a composition ratio of 80% by weight of MPC and 20% by weight of butyl methacrylate”
(MPC: 2-methacryloyloxyethyl phosphorylcholine))
Note 3: “POTURACA EXTRACT” (Bioland Lot.NMP-L-150603)
Note 4: “POTURACA EXTRACT” (Bioland Lot.NMP-L-202223)
Note 5: “Glychiritin K2” (Maruzen Pharmaceutical Co., Ltd.)
Note 6: “Allantoin” (Kawaken Fine Chemical Co., Ltd.)

Evaluation Items and Evaluation Criteria (1) Feeling when using 20 panelists (21 to 35 years old) as panelists and determining the feeling when using skin cosmetics (about 2 g) after washing their face as follows The average value of 20 people was obtained, and an average value of 1.5 points or more was evaluated as a light-feeling cosmetic when used.
2 points: When you feel that there is no stickiness during use and that you are familiar with the skin.
1 point: When it is slightly sticky at the time of use, or when it is felt that the familiarity with the skin is poor.
0 point: When stickiness is felt during use or when the skin feels bad.

(2) Stickiness after use 20 women (21 to 35 years old) are panelists, and after washing their face, using skin cosmetics (about 2g), the skin feel after 10 minutes is determined as follows. The average value of 20 people was obtained, and an average value of 1.5 or more was evaluated as a cosmetic without stickiness after use.
2 points: When the skin feels non-sticky.
1 point: When the skin feels somewhat sticky.
0 points: When the skin feels very sticky.

(3) Persistence of moisturizing effect 20 females (21 to 35 years old) are panelists, and after washing their face, using a skin cosmetic (about 2 g), the skin moisture after 2 hours is determined as follows. Then, the average value of 20 people was obtained, and the average value of 1.5 points or more was evaluated as a cosmetic having a good moisturizing effect.
2 points: When the skin feels sufficiently moistened just after use.
1 point: When feeling that the moisture of the skin is slightly insufficient compared with immediately after use.
0 point: When it feels that the moisture of the skin is clearly insufficient compared with immediately after use.

(4) Rough skin improvement effect 10 females (24 to 34 years old) with rough skin are used as panelists, and the skin condition when skin cosmetics are used twice a day for 2 weeks is examined. The average value of 10 persons was calculated | required as follows, and average value 1.5 point or more was evaluated as the cosmetics with a rough skin improvement effect.
2 points: When it is felt that rough skin has been cured.
1 point: When it feels that the rough skin has been cured somewhat.
0 point: When it feels that the rough skin improvement effect is not seen at all.

(5) Wrinkle-suppressing effect 20 females (21-35 years old) are panelists, and the skin condition when skin cosmetics are used twice a day for 2 weeks is examined. The average value of 20 persons was determined, and an average value of 1.5 points or more was evaluated as a cosmetic excellent in wrinkle suppression effect.
2 points: When wrinkles are clearly inconspicuous.
1 point: When wrinkles are slightly inconspicuous.
0 point: When it feels that there is no wrinkle suppression effect.

(6) Skin tension 20 females (21 to 35 years old) are panelists, and the skin condition when skin cosmetics are used twice a day for 2 weeks is examined. The average value of 20 persons was determined, and an average value of 1.5 points or more was evaluated as a cosmetic having an effect of applying a skin tone.
2 points: When the skin is clearly felt.
1 point: If you feel that your skin is slightly bitten.
0 points: When the skin feels non-sticky.

(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. The appearance was observed and evaluated in the following three stages.
○: Good stability (no change in appearance at any temperature)
Δ: Slightly inferior (slight appearance change at any temperature, resulting in precipitation or slight coloration)
X: poor stability (change in appearance at any temperature, resulting in precipitation or separation, or significant coloration)

  From Examples 1 to 3, the lotions using the ingredients of the present invention all have a good feel during use and are not sticky after use, have excellent moisturizing effects, have excellent skin roughness improvement effects, and wrinkle suppression effects. It gave skin elasticity and was excellent in stability over time. On the other hand, in Comparative Examples 1 and 2, sufficient performance was not obtained. That is, since the component (a) is not blended in Comparative Example 1, the durability of the moisturizing effect, the rough skin improving effect, and the wrinkle suppressing effect are weakened. In Comparative Example 2, the component (b) is not blended. From this, it is considered that the touch, the rough skin improving effect, and the wrinkle suppressing effect are weakened and the effect of giving the skin is weakened.

Examples 4 to 6, Comparative Examples 3 and 4
Skin cosmetics that are oil-in-water emulsions shown in Table 3 were prepared and evaluated in the same manner as in Examples 1 to 3. However, 14 components shown in Table 4 were used as common additive components. In addition, the meaning of each term represented in Table 3 is the same as that of the above-mentioned Table 1.

  The results are shown in Table 3.

Note 1: “Lipidure-HM” (manufactured by NOF Corporation) “Aqueous solution containing 40% by weight of polymer having a weight average molecular weight of about 80,000 with MPC of 100% by weight”
Note 2: “Lipidure-PMB” (manufactured by NOF Corporation) “Aqueous solution containing 5% by weight of polymer having a weight average molecular weight of about 600,000 with a composition ratio of 80% by weight of MPC and 20% by weight of butyl methacrylate”
Note 3: “POTURACA EXTRACT” (Bioland Lot.NMP-L-150603)
Note 4: “POTURACA EXTRACT” (Bioland Lot.NMP-L-202223)
Note 5: “Glychiritin K2” (Maruzen Pharmaceutical Co., Ltd.)
Note 6: “Allantoin” (Kawaken Fine Chemical Co., Ltd.)

  From Examples 4 to 6, all the emulsions using the ingredients of the present invention have a good feel during use and are not sticky after use, have excellent moisturizing effects, have excellent skin roughness improvement effects, wrinkle suppression effects, and skin. It gave a burr and was excellent in stability over time. On the other hand, in Comparative Examples 3 and 4, sufficient performance is not obtained. That is, since the component (a) is not blended in Comparative Example 3, the sustainability of the moisturizing effect, the rough skin improving effect, and the wrinkle suppressing effect are weakened. In Comparative Example 4, the component (b) is within the scope of the present invention. It is thought that the skin roughening effect, the wrinkle suppression effect, and the skin elasticity are weakened.

Examples 7 and 8
Skin cosmetics that are oil-in-water creams shown in Table 5 were prepared. Evaluation items (1) to (6) were carried out by the methods of Examples 1 to 3, and the stability over time of evaluation item (7) was as follows. Evaluation was made by inspection. However, 13 components shown in Table 6 were used as common additive components. In addition, the meaning of each term represented in Table 5 is the same as that of the above-mentioned Table 1.

  The results are shown in Table 5.

Note 1: “Lipidure-HM” (manufactured by NOF Corporation) “Aqueous solution containing 40% by weight of polymer having a weight average molecular weight of about 80,000 with MPC of 100% by weight”
Note 2: “Lipidure-PMB” (manufactured by NOF Corporation) “Aqueous solution containing 5% by weight of polymer having a weight average molecular weight of about 600,000 with a composition ratio of 80% by weight of MPC and 20% by weight of butyl methacrylate”
Note 3: “POTURACA EXTRACT” (Bioland Lot.NMP-L-150603)
Note 4: “POTURACA EXTRACT” (Bioland Lot.NMP-L-202223)
Note 5: “Glychiritin K2” (Maruzen Pharmaceutical Co., Ltd.)
Note 6: “Allantoin” (Kawaken Fine Chemical Co., Ltd.)
Note 7: “Sea Augretinol” (Maruzen Pharmaceutical Co., Ltd.)

(7) Stability over time The state when the cosmetic was sealed in a transparent glass container and stored at −5 ° C., 25 ° C., and 45 ° C. for 1 month was evaluated and evaluated in the following three stages.
○: Stability is good (no change in appearance at any temperature and no flickering etc.)
Δ: Slightly poor (slight precipitation or slight separation at any temperature, or slight lumps and lumps)
X: poor stability (clearly precipitate or separate at any temperature)

  From Examples 7 and 8, the cream of the present invention has a good feel during use and is not sticky after use, has excellent moisturizing effect, has excellent skin roughness improvement effect, wrinkle suppression effect and gives skin elasticity. The stability over time was also excellent.

Examples 9, 10
Skin cosmetics that are water-in-oil creams shown in Table 5 were prepared and evaluated by the evaluation methods shown in Examples 7 and 8. However, 11 components shown in Table 7 were used as common additive components.

  From the results of Examples 9 and 10, all of the creams of the present invention have a good feel during use and are not sticky after use, have excellent moisturizing effect, have excellent skin roughness improvement effect, wrinkle suppression effect and are applied to the skin. And stability over time was also excellent.

  As described above, the skin cosmetic of the present invention has a good feel during use and is not sticky after use, has excellent moisturizing effect, has excellent skin roughness improvement effect, wrinkle suppression effect and gives a skin tone, It is a skin cosmetic excellent in stability over time, and has a great influence on the deception world.

Claims (2)

(A) 100/0 to 10/90 moles of a structural unit based on 2- (meth) acryloyloxyethyl phosphorylcholine represented by formula (I) and a structural unit based on (meth) acrylic acid alkyl ester as component (a) The copolymer contains 0.005 to 10% by weight of the total weight% of both constituent units in a ratio of 60 to 100%, and contains 0.0005 to 2% by weight of the purslane extract as a dry weight as the component (b). A skin cosmetic characterized by.

(Wherein R ¹ represents a hydrogen atom or a methyl group, R ² , R ³ and R ⁴ each represents an alkyl group having 1 to 8 carbon atoms, and n represents an integer of 2 to 4)   Furthermore, 0.001-10 weight% of anti-inflammatory agents are contained as (c) component, The skin cosmetics of Claim 1 characterized by the above-mentioned.