JPH0930924A - 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 using both an alkyl-modified carboxyvinylpolymer exhibiting water repellency and a specific dimethylpolysiloxane. SOLUTION: A skin cosmetic contains the combination of an alkyl-modified carboxyvinylpolymer and a dimethylpolysiloxane having an average mol.wt. of >=50000. The dimethylpolysiloxane 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 approximately 0.01-10wt.% based on the whole amount of the skin cosmetic. The cosmetic can further hold a skin roughness-improving effect over a long time and is little in adhesion to contact articles.

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, by substituting the water-repellent alkyl-modified carboxyvinyl polymer and dimethylpolysiloxane having an average molecular weight of 50,000 or more in place of the above-mentioned humectant, excellent water resistance and stability, good spreadability and refreshing feeling are obtained. The present invention has been completed with the finding that it is possible to provide a skin cosmetic which is capable of maintaining the rough skin improving effect for a long period of time with the above-mentioned feeling of use.

That is, the present inventor provides the following skin cosmetics. The skin cosmetic according to claim 1, comprising an alkyl-modified carboxyvinyl polymer and dimethylpolysiloxane having an average molecular weight of 50,000 or more.

In claim 2, the average molecular weight is 5000
The skin cosmetic according to claim 1, comprising 0 or more of dimethylpolysiloxane in an amount of 0.05% by weight or more and 50% by weight or less of the entire skin cosmetic.

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 has an average molecular weight of 500.
It also comprises a high molecular weight dimethylpolysiloxane of 00 or more. The average molecular weight of this dimethylpolysiloxane is 50
If it is less than 000, it is difficult to impart the desired water resistance to the skin cosmetic containing the same, which is not preferable.

This dimethylpolysiloxane can be produced and used by a generally known method, or a commercially available product can be used. As a commercially available product, for example, T
SE200A (manufactured by Toshiba Silicone) and silicone G-
10 (manufactured by Toray Dow Corning Silicone Co., Ltd.) and the like.

The dimethylpolysiloxane may be blended in the skin cosmetic in an amount of 0.05% by weight or more and 50% by weight or less with respect to the entire skin cosmetic. And
It is preferable to mix the skin cosmetic in an amount of 0.5% by weight or more and 30% by weight or less. If the content is less than 0.05% by weight of the total skin cosmetics, the desired effect is not sufficiently exhibited, and if it exceeds 50% by weight, the dimethylpolysiloxane is a constituent of other skin cosmetics. Is difficult to dissolve, which is not preferable.

Further, since the viscosity of this dimethylpolysiloxane is usually high, cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, low-boiling isoparaffin hydrocarbons (carbon number: 1 to 30) or a low-boiling chain silicone and dissolving this in the skin cosmetic of the present invention is preferable in terms of formulation or use.

Surprisingly, the above-mentioned alkyl-modified carboxyvinyl polymer has an average molecular weight of 50,000.
By blending skin cosmetics with the above-mentioned dimethylpolysiloxane, it has an effect of improving rough skin while maintaining a refreshing feeling of use, and also has excellent water resistance, and stability with adhesion to contact substances suppressed. Good skin cosmetics are provided.

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, octyl paradimethylaminobenzoate, etc. Acid-based UV absorbers: Anthranilate-based UV absorbers such as methyl anthranilate; Salicylate-based UV absorbers such as octyl salicylate, phenyl salicylate, homomentyl salicylate dipropylene glycol salicylate, diethylene glycol salicylate, and methyl salicylate; paramethoxy Isopropyl cinnamate, Octyl paramethoxycinnamate, 2-Ethylhexyl paramethoxycinnamate, Glyceryl mono-2-ethylhexanoate 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'-methoxydibenzoylmethane can be incorporated into the skin cosmetic composition of the present invention.

By using the skin cosmetic of the present invention as a sun care product, it becomes possible to prevent the UV 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 composition 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.

Octanoic acid esters such as cetyl octanoate; glycerin tri-2-ethylhexanoate; pentaerythrit tetra-2-ethylhexanoate; lauric esters such as hexyl laurate; Myristic esters such as isopropyl octyldodecyl octyl myristate, palmitic esters such as octyl palmitate, stearic esters such as isocetyl stearate, isostearic esters such as isopropyl isostearate, and isopalmitic esters such as octyl isopalmitate. ,
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.

Further, sequestering agents for alanine, sodium edetate, sodium polyphosphate, phosphoric acid, etc .; 2-amino-2-methyl-1-propanol, 2-
Amino-2-methyl-1,3-propanediol, potassium hydroxide, sodium hydroxide, L-arginine, L-
Neutralizing agents such as lysine, triethanolamine, sodium carbonate; pH adjusting agents such as lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, dl-malic acid, potassium carbonate, sodium hydrogen carbonate, ammonium hydrogen carbonate; ascorbic acid , Α-tocopherol, dibutylhydroxytoluene, butylhydroxyanisole and the like may be incorporated in 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 and phenoxyethanol. 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 composition 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.

[0034]

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 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 19 out of 25 people recognized the rough skin improving effect x: 9 out of 25 or less 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 forearms of 25 healthy female panels, washed with water for 1 minute, and then evaluated for water resistance during washing according to the following criteria. Water resistance was determined.

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 > The skin cosmetics to be tested were applied to the forearms of 25 healthy women, and the feel on use (stickiness) accompanying the application was evaluated according to the following criteria:
Then, the feeling of use was judged.

Evaluation Criteria Effectiveness: Not sticky Effectiveness: Slightly sticky, but not problematic 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.

[0045]

[Table 1]

Manufacturing method Preliminarily polymerized dimethyl polysiloxane (TSE200
A) was dissolved in volatile isoparaffin and dimethylpolysiloxane 5CS with heating, and then the remaining oil phase component A and alkyl-modified carboxyvinyl polymer (PEMULEN) were added.
TR-1) and the aqueous phase component B containing
It was heated to 0 ° C. and dissolved. Aqueous phase component B dissolved while sufficiently performing homogenizer treatment on the dissolved oil phase component A
Was added to emulsify. This emulsion was cooled using a heat exchanger to obtain the desired cream.

According to this example, PMUULEN TR-1, which is an alkyl-modified carboxyvinyl polymer, and TSE200A, which is a high-molecular dimethylpolysiloxane, are combined together in a skin cosmetic (cream) to improve skin roughening effect. Stability under various temperature conditions,
It has been revealed that it is possible to impart excellent effects in water resistance and feeling in use. In addition, alkyl modified carboxy vinyl polymer (PEMULEN TR-
The cream of Comparative Example 1 containing no 1) had a problem of stability, and the polymer dimethylpolysiloxane (TSE200
The cream of Comparative Example 2 containing no A) had problems with the rough skin improving effect and the water resistance.

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 wt% Squalane 10.0 Isopropyl myristate 20.0 Decamethylcyclopentanehexane 35.0 TSE200A 5.0 Sorbitan monooleate 5.0 PEMULEN TR-2 0.1 Dipropylene glycol 3.0 Ion-exchanged water Residual (manufacturing method) Squalane, isopropyl myristate, decamethylcyclopentanehexane, polymeric dimethylpolysiloxane (TSE200A), and sorbitan monooleate are dissolved by stirring at 70 to 80 ° C, and alkyl is obtained. Modified carboxyvinyl polymer (PEMULEN TR-
2) and dipropylene glycol were added to dissolved ion-exchanged water to obtain a desired moisture lotion.

Example 3 Emulsion weight% A. Oil phase Liquid paraffin 20.0 Octamethylcyclotetrasiloxane 8.0 TSE200A 1.0 Vitamin A oil 0.1 B.I. Aqueous 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

(Production method) The oil phase component A was added to the water phase component B containing the alkyl-modified carboxyvinyl polymer PEMULENTR-1 and emulsified by an emulsifying machine to obtain a desired emulsion. The polymer dimethylpolysiloxane (TSE200A) 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 Silicone G-10 4.0 Octyl paramethoxycinnamate 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) Oil phase component A containing silicone G-10, which is a high molecular weight dimethylpolysiloxane, and PEMULEN, which is an alkyl-modified carboxyvinyl polymer.
The aqueous phase component B containing TR-1 was heated to 70 ° C. to be 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.

[0054]

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. A skin cosmetic comprising an alkyl-modified carboxyvinyl polymer and dimethylpolysiloxane having an average molecular weight of 50,000 or more. 2. The skin cosmetic according to claim 1, wherein the dimethylpolysiloxane having an average molecular weight of 50,000 or more is contained in an amount of 0.05% by weight or more and 50% by weight or less of the entire skin cosmetic.