JPH0930925A - Skin cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the skin cosmetic excellent in water resistance and stability, good in extensivity, and accompanied by a refreshing touch by adding an alkyl- modified carboxyvinylpolymer exhibiting water repellency and a silicone polymer having a specific structure. SOLUTION: A skin cosmetic contains an alkyl-modified carboxyvinylpolymer and one or more kinds of amino-modified or ammonium-modified silicone polymers of the formula R<1> is methyl, phenyl; R<2> is a group of formula: R<4> Z [R<4> is an alkylene; Z is -NR<5> 2 , -NR<5> (CH2 )a NR<5> 2 (R<5> is H, an alkyl), etc.; R<3> is R<4> Z, methyl, OH; m+n is 3000-20000, and n/m is 1/10000 to 1/500}. The silicone of the formula is preferably added in an amount of 0.05-50wt.% based on the whole amount of the skin cosmetic. The alkyl-modified carboxyvinylpolymer is preferably added in an amount of 0.01-10wt.% based on the cosmetic. The cosmetic can further hold a skin roughness-improving effect over along time.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention belongs to the technical field of skin cosmetics. More specifically, it relates to a technique relating to a skin cosmetic having excellent water resistance, having no sticky feeling, and having a rough skin improving action and having good stability.

[0002]

2. Description of the Related Art We have opportunities to come into contact with water and the like in various living situations, and these are often almost indispensable for human life. However, contact with such water may cause various disadvantages. For example, housewives often use detergent for water work, but this detergent tends to cause rough skin.

Hand creams are widely used for the purpose of protecting the skin from the rough skin. The main purpose of this hand cream is to replenish sebum lost by detergents in water work and the like, and a moisturizing agent is often added in order to impart a moisturizing effect to the skin. However, if the amount of the moisturizing agent or the like contained in the hand cream is increased in order to enhance these effects, the hand cream feels sticky to use and tends to cause problems in usability.

In addition, especially in summer, sun care products such as protectors and sunscreens are often used to protect the skin from ultraviolet rays from the intense sun, but at the same time, there is an opportunity to come into contact with water in a sea bath during summer. There is also a problem that the sun care product, after being applied, is relatively easy to run off due to sebum, sweat, water, etc., since it is a large amount and sweats a lot.

[0005]

The problem to be solved by the present invention is, therefore, that it has an effect of improving rough skin while maintaining a refreshing feeling of use, and that it is excellent in water resistance and has little adhesion to a contact substance and good stability. To provide a perfect skin cosmetic.

[0006]

Means for Solving the Problems The present inventor has conducted extensive studies for the purpose of solving the above problems. As a result, in particular, in place of the humectant, by blending a water-repellent alkyl-modified carboxyvinyl polymer and an amino-modified or ammonium-modified polymer silicone having a specific structure, excellent water resistance and stability, The present invention has been completed by finding that it is possible to provide a skin cosmetic having a good and refreshing feeling of use and capable of maintaining the rough skin improving effect for a long time.

That is, the present inventor provides the following skin cosmetics. The alkyl-modified carboxyvinyl polymer according to claim 1 and the general formula

[In the formula, each R ¹ independently represents a methyl group or a phenyl group, and each R ² independently represents a formula R ⁴ Z (R ⁴ represents an alkylene group having 3 or more and 6 or less carbon atoms). , Z is -N
_{^{R 5 2, -N + R 5}} 3 A -, -NR 5 (CH 2) a NR 5 2, -
_{^{NR 5 (CH 2) a N}} + R 5 3 A - and -NR ⁵ (CH _{2) a} N
(R ⁵ ) C═O (R ⁶ ), wherein each R ⁵ independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R ⁶
Represents an alkyl group having 1 to 4 carbon atoms, A is Cl,
Represents Br or I, a denotes a representative) a substituent having an amino group or an ammonium group represented by a monovalent group selected from the group consisting of an integer of 2 to 6), R ³ are each Independently represent the R ⁴ Z, a methyl group or a hydroxyl group,
m and n represent an integer satisfying the condition that m + n is 3000 or more and 20000 or less and n / m is 1/10000 or more and 1/500 or less], or one of amino-modified or ammonium-modified polymer silicones A skin cosmetic containing two or more kinds is provided.

In Claim 2, the amino-modified or ammonium-modified polymer silicone represented by the general formula (I) is contained in an amount of 0.05% by weight or more and 50% by weight or less of the total skin cosmetic. Item 1. A skin cosmetic according to item 1.

Hereinafter, the present invention will be described in detail. The skin cosmetic of the present invention comprises an alkyl-modified carboxyvinyl polymer such as CARBOPOL 1342, PEMUL.
It comprises what is known as a trade name of EN TR-1 and PEMULEN TR-2 (both manufactured by BF Goodrich Chemical Company).

The alkyl-modified carboxyvinyl polymer applicable to the present invention is not limited to these commercially available alkyl-modified carboxyvinyl polymers, and may be appropriately synthesized and used.

This alkyl-modified carboxyvinyl polymer is contained in the skin cosmetic of the present invention in an amount of 0.
It may be blended in the range of 01 wt% or more and 10 wt% or less.

If the amount of the skin cosmetic is less than 0.01% by weight, the sufficient effect due to the addition of the alkyl-modified carboxyvinyl polymer cannot be obtained.
If the amount is more than 10% by weight, the skin cosmetic may cause a sticky feeling on use, which is not preferable.

The skin cosmetic of the present invention also comprises an amino-modified or ammonium-modified polymer silicone represented by the general formula (I). This amino-modified or ammonium-modified polymer silicone (I) is in the form of a soft rubber, and it is possible to obtain a skin cosmetic excellent in water resistance without being sticky when used in a skin cosmetic. it can.

In formula (I), examples of the alkylene group which can be taken by R ^{4 and} which has 3 to 6 carbon atoms include trimethylene group, tetramethylene group, pentamethylene group and hexamethylene group. Examples of the alkyl group having 1 to 4 carbon atoms which R ⁵ and R ⁶ can take include a methyl group, an ethyl group, a propyl group, a butyl group, an isopropyl group, a sec- butyl group, and a tert -butyl group. .

Further, m + n is 3,000 or more and 20,000 or less as described above, but when it is less than 3,000, the amino-modified or ammonium-modified polymer silicone (I) becomes liquid and is blended in the skin cosmetic composition of the present invention. However, the skin protecting effect is not sufficiently exerted, and as a result, the intended effect of the skin cosmetic of the present invention cannot be sufficiently exerted. Further, n / m is 1 / 10,000 or more and 1/500 or less as described above, and if it exceeds 1/500, the content of amino groups or ammonium groups in this polymer silicone becomes high, and extra crosslinking is mixed. It becomes a cause and tends to be accompanied by a raw material odor, which is not preferable. Also, 1/100
If it is less than 00, the interaction with the skin becomes weak, and the skin protecting effect is not sufficiently exerted even when it is added to the skin cosmetic composition of the present invention, and as a result, the intended effect of the skin cosmetic composition of the present invention is also sufficient. It is not preferable because it cannot be exhibited.

The amino-modified or ammonium-modified polymer silicone (I) can be produced by the same method as that for commonly known amino-modified or ammonium-modified silicone. For example, it can be produced by polycondensation reaction of γ-aminopropylmethyldiethoxysilane, cyclic dimethylpolysiloxane and hexamethyldisiloxane under an alkali catalyst.

A commercially available amino-modified or ammonium-modified polymer silicone (I) can also be incorporated in the skin cosmetic of the present invention.

The amino-modified or ammonium-modified polymer silicone (I) can be blended in the skin cosmetic of the present invention in an amount of 0.05% by weight or more and 50% by weight or less based on the entire skin cosmetic. And, the total amount of skin cosmetics is 0.
It is preferable to blend in the range of 5% by weight or more and 30% by weight or less.

This compounding amount is 0.05% of the whole skin cosmetics.
If it is less than 50% by weight, a sufficient effect due to the incorporation of the amino-modified or ammonium-modified polymer silicone (I) cannot be obtained, and if it exceeds 50% by weight, it may become a component of other skin cosmetics. The amino-modified or ammonium-modified polymer silicone (I) is difficult to dissolve, which is not preferable.

Since the amino-modified or ammonium-modified polymer silicone (I) usually has a high viscosity, for example, a cyclic silicone such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, dimethylpolysiloxane. It is preferable to dissolve it in a low-boiling chain silicone or a low-boiling isoparaffin hydrocarbon (carbon number: 1 to 30) in terms of formulation or use.

Surprisingly, by blending the skin-care cosmetic with the alkyl-modified carboxyvinyl polymer and the amino-modified or ammonium-modified polymer silicone (I) as described above, an effect of improving rough skin can be obtained while maintaining a refreshing feeling of use. A skin cosmetic having excellent stability, having excellent water resistance and adhesion to a contact substance is provided.

It should be noted that these desired effects can be sufficiently exhibited only by adding the above-mentioned active ingredient to the skin cosmetic of the present invention. That is, it is not particularly necessary to additionally mix other active ingredients in order to exert the above effects.
However, for the purpose of imparting the effect that the skin cosmetics will generally exhibit by blending the other medicinal ingredients, the incorporation of these other medicinal ingredients into the skin cosmetics of the present invention means It is possible within a range that does not impair the intended effect of.

For example, when the skin cosmetic of the present invention is used as a sun care product, paraaminobenzoic acid such as paraaminobenzoic acid, ethyl paraaminobenzoate, glyceryl paraaminobenzoate, amyl paradimethylaminobenzoate and octyl paradimethylaminobenzoate. Acid-based UV absorbers: Anthranilate-based UV absorbers such as methyl anthranilate; Salicylate-based UV absorbers such as octyl salicylate, phenyl salicylate, homomenthyl salicylate, dipropylene glycol salicylate, ethylene glycol salicylate, myristyl salicylate, methyl salicylate; Isopropyl methoxycinnamate, octyl paramethoxycinnamate, 2-ethylhexyl paramethoxycinnamate, mono-2-ethylhexanoic acid glyceryl diparamethoxycinnamate , [4- bis (trimethylsiloxy) methylsilyl-3-methylbutyl] -3,4,5
Cinnamic acid-based UV absorbers such as trimethoxycinnamic acid ester; 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2-
Benzophenone-based UV absorbers such as sodium hydroxy-4-methoxybenzophenone-5-sulfonate; urocanic acid, ethyl urocanate, 2-phenyl-5-
Methyl benzoxazole, 2- (2 ^'- hydroxy -
5'-methylphenyl) benzotriazole, 4- tert
An ultraviolet absorber such as -butyl-4'-methoxybenzoylmethane can be incorporated into the skin cosmetic of the present invention.

By using the skin cosmetic of the present invention as a sun care product, it becomes possible to prevent the ultraviolet absorbent from falling off due to contact with water, sweat or sebum, which is often found in summer.

In order to impart a further moisturizing effect to the skin cosmetic of the present invention, a moisturizing agent such as polyethylene glycol, propylene glycol, 1,3-butylene glycol, hexylene glycol, glycerin and diglycerin may be added. it can. In the skin cosmetic of the present invention, it is possible to reduce the amount of these moisturizers originally blended as a main component in a skin cosmetic desired to have a moisturizing effect or to eliminate the need for such a moisturizing agent. It becomes possible to remove the sticky feeling from the skin cosmetics due to excessive blending of the moisturizer.

Further, as drug components, vitamin A oil, retinol, retinol palmitate, inosit, pyridoxine hydrochloride, benzyl nicotinate, nicotinamide, dl-α-tocopherol nicotinate, magnesium ascorbate phosphate, vitamin D ₂ (ergo Calciferol), dl-α-tocopherol, dl-α-
Tocopherol-2-L-ascorbic acid diester potassium, vitamins such as dl-α-tocopherol acetate, pantothenic acid, biotin; hormones such as estradiol, ethinyl estradiol; arginine, aspartic acid, cystine, cysteine, methionine, serine, leucine , Amino acids such as tryptophan; anti-inflammatory agents such as allantoin, glycyrrhetinic acid and azulene;
Whitening agents such as arbutin; astringents such as zinc oxide and tannic acid; cooling agents such as L-menthol and camphor; sulfur; lysozyme chloride; pyridoxine hydrochloride; γ-oryzanol;

Further, various extracts having various medicinal effects can be blended. That is, dokudami extract,
Oak extract, melilot extract, bonito extract, liquorice extract, peonies extract, bonsai extract, loofah extract, kina extract, saxifrage extract,
Clara extract, kohone extract, fennel extract, primrose extract, rose extract, dio extract, lemon extract, shikon extract, aloe extract, ginger root extract, eucalyptus extract, horsetail extract, sage extract, thyme extract, tea extract, seaweed extract, cucumber extract, clove. An extract, a raspberry extract, a melissa extract, a carrot extract, a horse chestnut extract, a peach extract, a peach leaf extract, a mulberry extract, a cornflower extract, a hamamelis extract, a placenta extract, a thymus extract, a silk extract etc. can be mix | blended.

The above-mentioned medicinal ingredients are not limited to other medicinal ingredients which can be incorporated into the skin cosmetic of the present invention. In addition to the above-listed medicinal ingredients alone being blended in the skin cosmetic composition of the present invention, it is also possible to blend two or more kinds of medicinal ingredients in an appropriate combination according to the purpose. Further, the above medicinal ingredients are used in a free state, those capable of salt formation are added as acid or base salts, and those having a carboxylic acid group are added to the skin cosmetic composition of the present invention in the form of its ester. Is also possible.

INDUSTRIAL APPLICABILITY The present invention can be widely applied to cosmetics applied to the outer skin, and its dosage form is also an aqueous solution type, a solubilizing type, an emulsifying type, a powder type, an oil liquid type, a gel type, an ointment type. A wide range of dosage forms such as an aerosol system, a water-oil two-layer system, a water-oil-powder three-layer system, and the like can be adopted. That is, basic cosmetics can be widely applied to the above-mentioned various dosage forms in the form of facial cleansers, lotions, emulsions, creams, gels, essences (cosmetics), packs and masks, and the like. In addition, makeup cosmetics can be widely applied to forms such as foundations and lipsticks. And, in these dosage forms and forms,
The possible dosage forms and forms of the skin cosmetic of the present invention are not limited. In the skin cosmetic composition of the present invention, a commonly known base component or the like depending on the desired dosage form and form,
By the blending, it can be widely used and blended as long as the intended effect of the present invention is not impaired.

That is, linseed oil, camellia oil, macadamia nut oil, corn oil, mink oil, olive oil,
Avocado oil, sasanqua oil, castor oil, safflower oil, ginger oil, cinnamon oil, jojoba oil, grape oil, sunflower oil, almond oil, rapeseed oil, sesame oil, wheat germ oil,
Liquid oils and oils such as rice germ oil, rice bran oil, cottonseed oil, soybean oil, peanut oil, teaseed oil, evening primrose oil, egg yolk oil, cattle leg oil, liver oil, triglycerin, glyceryl trioctanoate, glyceryl triisopalmitate; palm. Liquid or solid oils and fats such as oil, palm oil and palm kernel oil; solid oils and fats such as cacao butter, beef tallow, sheep fat, lard, horse fat, hydrogenated oil, hydrogenated castor oil, oak and shea butter; beeswax, candelilla Waxes such as wax, cotton wax, carnauba wax, bayberry wax, ivowa wax, whale wax, montan wax, nuka wax, lanolin, reduced lanolin, hard lanolin, kapok wax, sugar cane wax, jojoba wax, shellac wax and the like may be blended in the skin cosmetic of the present invention. it can.

Further, octanoic acid ester such as cetyl octanoate, glycerin tri-2-ethylhexaenoate, isooctanoic acid ester such as pentaerythritol tetra-2-ethylhexanoate, lauric acid ester such as hexyl laurate, myristin Isopropyl acid, octyldodecyl myristate, etc. myristic acid ester, octyl palmitate, etc. palmitic acid ester, isocetyl stearate, etc. stearic acid ester, isopropyl isostearate, etc. isostearic acid ester, isopalmitic acid octyl, etc. ,
Oleic acid esters such as isodecyl oleate, adipic acid diesters such as diisopropyl adipate, sebacic acid diesters such as diethyl sebacate, ester oils such as diisostearyl malate; liquid paraffin, ozokerite, squalane, squalene, pristane, paraffin, Hydrocarbon oils such as isoparaffin, ceresin, petrolatum and microcrystalline wax can be blended in the skin cosmetic composition of the present invention.

Further, lower alcohols such as methanol, ethanol, propanol and isopropanol; sterols such as cholesterol, sitosterol, phytosterol and lanosterol can be blended in the skin cosmetic composition of the present invention.

Further, gum arabic, tragacanth gum,
Galactan, carob gum, guar gum, karaya gum,
Plant-based macromolecules such as carrageenan, pectin, agar, quince seed (quince), arge colloid (brown algae extract), microbial macromolecules such as dextran, succinoglucan, pullulan, etc., animal systems such as collagen, casein, albumin, gelatin, etc. Polymers, methyl cellulose, nitrocellulose, ethyl cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, sodium carboxymethyl cellulose, crystalline cellulose, cellulose powder and other cellulosic polymers, sodium alginate, propylene glycol alginate, etc. Alginic acid based polymers, polyvinyl alcohol, polyvinyl methyl ether, polyvinylpyrrolidone, carboxyvinyl polymer CARBOPOL, etc., vinyl-based polymer, polyoxyethylene-based polymer, polyoxyethylene-polyoxypropylene copolymer-based polymer, sodium polyacrylate, polyethyl acrylate, acrylic acid-based polymer such as polyacrylic acid amide, polyethylene Water-soluble polymers such as inorganic water-soluble polymers such as imines, cationic polymers, bentonite, magnesium aluminum silicate, laponite, hectorite, and silicic acid anhydride can be incorporated into the skin cosmetic composition of the present invention. Furthermore, alanine, edetic acid sodium salt, sodium polyphosphate,
Sequestering agents such as phosphoric acid; 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3
A neutralizing agent such as propanediol, potassium hydroxide, sodium hydroxide, L-arginine, L-lysine, triethanolamine, sodium carbonate; lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, dl-malic acid, PH adjusting agents such as potassium carbonate, sodium hydrogen carbonate, ammonium hydrogen carbonate; ascorbic acid, α-tocopherol,
Antioxidants or antioxidant auxiliaries such as dibutylhydroxytoluene and butylhydroxyanisole can be added to the skin cosmetic composition of the present invention.

Antibacterial agents such as benzoic acid, salicylic acid, carboxylic acid, sorbic acid, paraoxybenzoic acid ester, parachlorometacresol, hexachlorophene, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, photosensitizer, phenoxyethanol, etc. Can be incorporated into the skin cosmetic of the present invention. Further, if necessary, suitable fragrances, dyes and the like can be added to the skin cosmetic of the present invention within a range that does not impair the intended effects of the present invention.

In the skin cosmetic of the present invention, since the alkyl-modified carboxyvinyl polymer to be blended itself has an excellent emulsifying power, it is not necessary in principle to further blend another emulsifier such as a surfactant. However,
Mainly in order to improve the stability of the skin cosmetics of the present invention, a small amount of a surfactant such as monoglyceride, sorbitan fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene fatty acid ether, etc. is used. It can also be added to the invention skin cosmetics.

The above-mentioned base components are examples, and the base components that can be added to the skin cosmetic of the present invention are not limited to these base components. These base components can be combined in the skin cosmetic of the present invention in an appropriate combination according to the formulation according to the desired dosage form. The specific formulation of the skin cosmetic composition of the present invention will be described in Examples described later.

[0037]

EXAMPLES Next, the present invention will be described more specifically by way of examples. However, this should not limit the technical scope of the present invention. In addition, below, all with a weight% means the weight% with respect to the whole skin cosmetics. First, a method for evaluating the skin cosmetic of the present invention in Examples described later will be described.

< Rough skin improvement test > Healthy person female panel 25
A 10% sodium dodecylsulfate aqueous solution was applied to the forearm skin of a known name for 3 days to cause rough skin. After 5 days, the test skin cosmetic (20 μl) was openly applied to the rough skin. This was repeated continuously for 5 days, and a sensory test was conducted on the 6th day for the effect of improving the skin roughness by the skin cosmetics, and the improvement of the skin cosmetics used for the skin roughness was examined.

Judgment ○: 20 or more out of 25 people recognized the rough skin improving effect Δ: 10 to 25 out of 25 people recognized the rough skin improving effect ×: less than 10 out of 25 people the rough skin improving effect Admitted

< Stability test > Skin cosmetics were tested at -10 ° C.
The sample was left in a thermostatic chamber at 0 ° C, 5 ° C, 30 ° C and 45 ° C for 3 months, and evaluated for color tone, odor and appearance.

Judgment ○: No change Δ: Slight change X: Change

<Water resistance test> Skin cosmetics were applied to the forearm of 25 healthy female panels, washed with water for 1 minute, and then evaluated for water resistance during washing according to the following criteria. The water resistance of the skin cosmetics was evaluated.

Judgment : 20 or more out of 25 people recognized water resistance. Δ: 10 to 19 out of 25 people recognized water resistance. ×: 9 out of 25 people recognized water resistance.

< Feeling test on use > A skin cosmetic was applied to the forearm of 25 healthy females, and the feel on use (stickiness) accompanying the application was evaluated according to the following criteria, and then the feel on use was determined.

Criteria Criteria Effectiveness: Not sticky Effectiveness: Slightly sticky, but no problem in use Slightly effective: Sticky Ineffective: Remarkably sticky

Judgment ⊚: 2 subjects were found to be markedly effective, effective or slightly effective
0 or more ○: 1 subject was found to be markedly effective, effective or moderately effective
3 or more and 19 or less △: 7 subjects recognized to be markedly effective, effective or moderately effective
No less than 12 and no more than 6: 6 subjects were found to be markedly effective, effective or moderately effective
Less than

[Example 1] Creams having the formulations shown in Table 1 below were prepared and evaluated according to the above criteria.

[0048]

[Table 1]

Preparation Method Ammonium-modified polymer silicone was dissolved in volatile isoparaffin and dimethylpolysiloxane 5CS by heating in advance, and an aqueous phase containing the remaining oil-phase component A and alkyl-modified carboxyvinyl polymer (PEMULEN TR-1). Ingredient B was mixed with each other and heated to 70 ° C to dissolve them. The dissolved aqueous phase component B was added to the dissolved oil phase component A while sufficiently performing a homogenizer treatment, and emulsified. This emulsion was cooled using a heat exchanger to obtain the desired cream.

According to this example, PEMULEN TR-1, which is an alkyl-modified carboxyvinyl polymer, and ammonium-modified polymer silicone were combined together in a skin cosmetic (cream) to improve the skin roughening effect and under various temperature conditions. It has been revealed that it is possible to impart excellent effects on stability, water resistance and feeling in use. The cream of Comparative Example 1 containing no alkyl-modified carboxyvinyl polymer (PEMULEN TR-1) had a problem in stability, and the cream of Comparative Example 2 containing no ammonium-modified polymer silicone had a rough skin improving effect and water resistance. There was a problem.

Hereinafter, examples of blending the skin cosmetic composition of the present invention in various dosage forms will be described. Each skin cosmetic had excellent water resistance and good stability. In addition, a refreshing feeling of use was recognized, and an effect of improving rough skin was recognized.

Example 2 Moisture Lotion Weight% Squalane 10.0 Isopropyl myristate 20.0 Decamethylcyclopentanehexane 35.0 Amino-modified polymer silicone (R ¹ and R ³ are methyl groups, R ² is-( _{CH 2) 3 n (CH 3} ) (CH 2) 2 n (CH 3) 2, m = 1 0000, n = 5) 5.0 sorbitan monooleate 5.0 PEMULEN TR-2 0.1 dipropylene glycol 3 0.0 ion-exchanged water residual

(Production method) Squalane, isopropyl myristate, decamethylcyclopentanehexane, amino-modified polymer silicone and sorbitan monooleate were added to 70 parts.
The mixture was stirred and dissolved at -80 ° C, and this was added to ion-exchanged water in which PEMULEN TR-2, which is an alkyl-modified carboxyvinyl polymer, and dipropylene glycol were dissolved to obtain a desired moisture lotion.

Example 3 Emulsion wt% A. Oil phase Liquid paraffin 20.0 Octamethylcyclotetrasiloxane 8.0 Amino-modified polymer silicone (R ¹ and R ³ are methyl groups, R ² is-(CH ₂ ) ₃ N (CH ₃ ) ₂ , m = 5000, n = 5) 1.0 Vitamin A oil 0.1 B. Water phase 1,3-butylene glycol 10.0 Glycerin 3.0 Placenta extract 0.5 Loofah extract 2.0 PEMULEN TR-1 2.0 CARBOPOL 941 0.15 Potassium hydroxide 2.0 Trisodium edetate 0.15 Methyl paraoxybenzoate 0.1 Phenoxyethanol 0.2 Ion-exchanged water Residual

(Manufacturing Method) The oil phase component A was emulsified by an emulsifying machine while adding it to the water phase component B containing the alkyl-modified carboxyvinyl polymer PEMULENTR-1 to obtain a desired emulsion. The amino-modified polymer silicone in the oil phase component A was used after being dissolved in octamethylcyclotetrasiloxane by heating.

Example 4 Sunscreen Cream wt% A. Oil phase Squalane 30.0 Octamethylcyclotetrasiloxane 10.0 Ammonium modified polymer silicone (10% of R ¹ is methyl group, R ³ is methyl group, R ² is-(CH ₂ ) ₃ N ⁺ (CH ₃ ) ₃ Cl ⁻ , m = 10000, n = 2) 4.0 Octyl methoxycinnamate 5.0 Oxybenzone 3.0 4- tert -Butyl-4′-methoxydibenzoylmethane 1.0 Glycerin diisostearate 3 .0 Organically modified montmorillonite 1.5 Butyl paraoxybenzoate 0.3 Perfume Suitable amount B. Water phase 1,3-butylene glycol 12.0 Glycerin 5.0 PEMULEN TR-1 3.0 Ion-exchanged water Residual

(Production Method) The oil phase component A containing the ammonium-modified silicone and the aqueous phase component B containing the alkyl-modified carboxyvinyl polymer were heated to 70 ° C. and dissolved. An emulsification was carried out by adding the dissolved aqueous phase component to the dissolved oil phase component while sufficiently performing a homogenizer treatment. This emulsion was cooled using a heat exchanger to obtain the desired sunscreen cream.

[0058]

Industrial Applicability According to the present invention, there is provided a skin cosmetic which has an effect of improving rough skin while maintaining a refreshing feeling of use, is excellent in water resistance, and has little stability even when attached to a contact object.

Claims (2)

[Claims] 1. An alkyl-modified carboxyvinyl polymer and a general formula: [In the formula, each R ¹ independently represents a methyl group or a phenyl group, and each R ² independently represents a formula R ⁴ Z (R ⁴ is 3 or more and 6 or more).
Represent the following alkylene groups of a carbon number, Z is -NR ⁵ _2, -
_{^{N + R 5 3 A -,}} -NR 5 (CH 2) a NR 5 2, -NR 5 (C
_{^{H 2) a N + R 5}} 3 A - and _{^{-NR 5 (CH 2) a N}} (R 5) C
═O (R ⁶ ) (In the formula, each R ⁵ independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R ⁶ is 1 carbon atom.
Represents an alkyl group of 4 or more, and A is Cl, Br or I
And a represents a substituent having an amino group or an ammonium group represented by a monovalent group selected from the group consisting of 2 or more and 6 or less), and R ^3's each independently. R ⁴ Z represents a methyl group or a hydroxyl group, m and n are such that m + n is 3,000 or more and 20,000 or less, and n /
represents an integer satisfying the condition that m is 1 / 10,000 or more and 1/500 or less], and a skin cosmetic containing one or more amino-modified or ammonium-modified polymer silicone. 2. The method according to claim 1, wherein the amino-modified or ammonium-modified polymeric silicone represented by the general formula (I) is contained in an amount of 0.05% by weight or more and 50% by weight or less of the total skin cosmetic. Skin cosmetics.