JP2001261525A - Oil-in-water type emulsion cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil-in-water type emulsion cosmetic which has excellent stability for a long period of time without needing the employment a surfactant and gives a good use touch and a good finish touch. SOLUTION: This oil-in-water type emulsion cosmetic is prepared by forming an emulsion from an alkyl-modified carboxyvinylpolymer represented by the general formula (1) [R1 is hydrogen atom or a 10 to 30C alkyl group; (n), (n'), (m) and (m') are each such the arbitrary number as giving the expression: n+n'+m+m'=40 to 100; (l) is such the arbitrary number as giving the mol.wt. within a prescribed range] and having a mol.wt. of 500,000 to 3,000,000 as an emulsifier and other cosmetic components, and then formulating glucomannan or the like to the emulsion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an oil-in-water emulsion cosmetic. More specifically, it has excellent long-term stability without requiring the use of a surfactant whose avoidance is desired, especially in cosmetics that require high safety, and has a moist and smooth feel to the skin or hair. The present invention relates to an oil-in-water emulsified cosmetic which is imparted and has a good feeling in use and finish.

[0002]

2. Description of the Related Art Conventionally, creams and emulsions emulsifying various oily and aqueous materials have been widely used as emulsifying compositions for cosmetics. In the production of such an emulsion composition, it is essential not only to treat the raw materials under various conditions set strictly, but also to use a surfactant to guarantee the stability over time of the emulsion composition. And it was. However, in recent years, even higher safety is expected for cosmetics, and from this viewpoint, the presence of a surfactant may be problematic.

[0003] Conventionally, in the case of skin or hair cosmetics, various components have been tried for the purpose of imparting conditioning effects such as suppleness and smoothness to skin and hair. It includes, for example, cationic surfactants, oils such as silicone oils or ester oils,
Alternatively, there are polymer substances and the like, which have been appropriately blended according to the purpose.

[0004] However, of these components, for example, cationic surfactants are difficult to use on the skin from the viewpoint of safety. In addition, although it is used for imparting flexibility and antistatic property to hair, its amount is limited from the viewpoint of safety, and its effect is naturally limited.

[0005] Oils are intended to impart moist and suppleness to the skin, and to impart gloss and smoothness to the hair and improve hair styling properties. Irrespective of the hair, there may be disadvantages in terms of sensory characteristics such as stickiness and heavy finish. For this reason, higher fatty acids or glycerin monofatty acid esters may be used in order to stably blend the oil agent, but in this case, the above-mentioned disadvantages such as a decrease in the effect of the cationic surfactant are reduced. there were.

[0006] In addition, high-molecular substances have the disadvantage that they form a film and cause stiffness, and the degree of polymerization increases the feel, making it difficult to obtain a light and supple conditioning effect on the skin and hair. was there.

[0007]

[Problems to be Solved] From the above, excellent stability without using a surfactant having a problem in blending in order to ensure high safety, and use of a conditioning effect and the like. There is a demand for cosmetics for skin or hair having good feeling. The present inventor has conducted intensive studies in view of the above-described circumstances, and as a result, has found a means for solving the problem, and has completed the present invention.

Accordingly, the present invention has excellent stability without the need for the addition of a surfactant which is a hindrance to ensuring high safety, and has a moist and smooth feel to the skin or hair. The object of the present invention is to solve the problem of providing an oil-in-water emulsified cosmetic composition which is excellent in use feeling and finish feeling that can impart odor.

[0009]

SUMMARY OF THE INVENTION The present invention provides an oil-in-water emulsified cosmetic which can achieve the above object. The oil-in-water emulsified cosmetic has the following general formula (1):
Which is characterized by containing an alkyl-modified carboxyvinyl polymer having a molecular weight of 500,000 to 3,000,000 and one or more glucomannans.
(However, in the general formula (1), R ¹ is a hydrogen atom or a carbon atom 1)
0 to 30 alkyl groups, n, n ′, m and m ′ are n +
An arbitrary number such that n ′ + m + m ′ = 40 to 100 is indicated, and 1 is an arbitrary number such that the molecular weight falls within a predetermined range. )

[0010]

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As described above, the cosmetic gives a moist and smooth feel to skin and hair, and can provide an oil-in-water emulsified cosmetic having a good feeling in use and finish. . In addition, the cosmetic does not require the addition of a surfactant, which has been required for ensuring the stability, so that it was possible to reduce problems in securing high safety.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The oil-in-water emulsified cosmetic of the present invention
It contains an alkyl-modified carboxyvinyl polymer having a molecular weight of 500,000 to 3,000,000 and one or more glucomannans, and the alkyl-modified carboxyvinyl polymer forms an emulsified composition by emulsifying an oil agent. ing. As a result, the cosmetic of the present invention contains an emulsified composition obtained by emulsifying an oil and one or two types of glucomannan.

The alkyl-modified carboxyvinyl polymer used in the present invention is an alkyl methacrylate acrylate copolymer represented by the following general formula (1) and having a molecular weight of 500,000 to 3,000,000. A specific example is Pemule
n) TR-1, Pemulen TR-2 (BF Goodrich) and those known under the trade names Carbopol 1342.

[0014]

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Next, the glucomannan used in the present invention will be described in detail. Glucomannan originally swells by absorbing moisture, and is a raw material for the production of konjac as food by taking well-known means, such as adding an alkaline earth metal hydroxide such as calcium oxide and coagulating. Has been offered to. It is a general term for polysaccharides containing D-glucose and D-mannose as main components, and is isolated from the corm of a plant of the genus Konjac and from the hemicellulose fraction of certain conifers.

[0016] The gluconannan is obtained by pulverizing konjac potato, and the gluconannan which is preferably used in the present invention is Amorphophallalus Konja which belongs to the Araceae family in terms of plant classification.
c, K. D-glucose and D-glucose obtained by purifying, separating and pulverizing glucomannan contained in Koch tubers (potatoes)
-Mannose is a β-1.4 bond in a ratio of about 1: 1.6, and has a molecular weight of 1,000,000 to 2,000,000. Commercial products include Leo Rex RX, Leo Rex RS, and Propol A manufactured by Shimizu Chemical Co., Ltd.

In the present invention, the above-mentioned glucomannan is used in the form of an aqueous dispersion in the aqueous phase of the oil-in-water emulsion composition. A preferred amount is 0.01 to 5.0% by weight, and more preferably 0.05 to 3.0% by weight. 0.
If the amount is less than 01% by weight, the cosmetics of the present invention lack the expected feeling of use and finish. In addition, the addition of more than 5% by weight does not enhance the effect of the present invention.

The oil component used in the oil-in-water emulsified cosmetic composition of the present invention can be mixed with an oil agent used in an ordinary emulsified composition for cosmetics as long as the oil phase does not lack uniformity. . As such an oil agent, any of natural animal / vegetable oil and synthetic oil can be used. Specifically, liquid paraffin, liquid such as squalane, paste or solid hydrocarbon, wax, higher fatty acid, higher alcohol, ester, Glyceride or a silicone-based oil agent may, for example, be mentioned.

For example, liquid oils and fats include linseed oil, camellia oil, macadamia nut oil, corn oil, mink oil, olive oil, avocado oil, sasanqua oil, castor oil,
Safflower oil, kyonin oil, cinnamon oil, jojoba oil,
Grape oil, sunflower oil, almond oil, rapeseed oil, sesame oil, wheat germ oil, rice germ oil, rice bran oil, cottonseed oil, soybean oil, peanut oil, teaseed oil, evening primrose oil, egg yolk oil, cow leg oil, liver oil, There are triglycerin, glycerin trioctanoate, pentaerythrit tetraoctanoate, glycerin triisopalmitate and the like.

Examples of solid fats and oils include cocoa butter, coconut oil, palm oil, palm kernel oil, tallow, sheep fat, lard, horse fat, hardened oil, hardened castor oil, mocro, shea butter, and the like. As waxes, beeswax, candelilla wax, cotton wax,
Carnauba wax, Bayberry wax, Ibota wax, Whale wax,
Montan wax, wax wax, lanolin, reduced lanolin, hard lanolin, kapok wax, sugar cane wax, jojoba wax, shellac wax and the like.

Examples of ester oils include octanoic acid esters such as cetyl octanoate, lauric acid esters such as hexyl laurate, myristic acid esters such as isopropyl myristate, octyldodecyl myristate, palmitic acid esters such as octyl palmitate, and stearic acid. Stearic acid esters such as isocetyl acid, isostearic acid esters such as isopropyl isostearate, isopalmitic acid esters such as octyl isopalmitate,
Examples include oleic acid esters such as isodecyl oleate, adipic acid diesters such as diisopropyl adipate, sebacic acid diesters such as diethyl sebacate, and malic acid diesters such as diisostearyl malate.

Examples of the hydrocarbon oil include liquid paraffin, ozokerite, squalane, squalene, pristane, paraffin, isoparaffin, ceresin, petrolatum, microcrystalline wax and the like. Examples of the silicone oil include chain silicones such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane, octamethylcyclotetrasiloxane,
Cyclic silicones such as decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane;

The amount of these oil components is preferably 60% by weight or less in the emulsified composition, and more preferably 1 to 30% by weight from the viewpoint of usability. If it exceeds 60% by weight, a problem occurs in terms of stability.

With respect to the aqueous phase component used in the present invention, various water-soluble components usually used in an emulsified composition for cosmetics are mixed according to the purpose within a quantitative and qualitative range that does not impair the effects of the present invention. be able to. For example, lower alcohols include methanol, ethanol, propanol, isopropanol and the like.

As the humectant, polyethylene glycol, propylene glycol, dipropylene glycol,
1,3-butylene glycol, erythritol, trehalose, hexylene glycol, glycerin, diglycerin, xylitol, maltitol, maltose, D-
Mannit, water syrup, glucose, fructose, sodium chondroitin sulfate, sodium hyaluronate, sodium adenosine phosphate, sodium lactate, bile salts, pyrrolidone carboxylate, glucosamine, cyclodextrin and the like.

Examples of the water-soluble polymer include gum arabic, tragacanth, galactan, carob gum, guar gum,
Karaya gum, carrageenan, pectin, agar, quince seed (quince), starch (rice, corn,
Potato, wheat), alge colloid (brown algae extract)
Plant-based polymers such as dextran, succinoglucan,
Microbial polymers such as pullulan, collagen, casein,
There are animal polymers such as albumin and gelatin, and starch polymers such as carboxymethyl starch and methylhydroxypropyl starch.

Examples of the polymer include cellulosic polymers such as methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, hydroxypropylcellulose, sodium carboxymethylcellulose, crystalline cellulose, and cellulose powder. And alginic acid-based polymers such as sodium alginate and propylene glycol alginate.

Further, as water-soluble polymers, polyvinyl methyl ether, carboxyvinyl polymer (Carbop
ol 934 (BF Goodrich)), acrylic polymers such as polyoxyethylene polymers, polyoxyethylene polyoxypropylene copolymer polymers, sodium polyacrylate, polyethyl acrylate, and polyacrylamide. There are also inorganic water-soluble polymers such as molecules, polyethyleneimine, cationic polymers, bentonite, aluminum magnesium silicate, laponite, hectorite, and silicic anhydride.

Examples of the oily ultraviolet absorber include a paraaminobenzoic acid ultraviolet absorber, an anthranilic acid ultraviolet absorber such as methyl anthranilate, a salicylic acid ultraviolet absorber such as octyl salicylate, phenyl salicylate, and homomethyl salicylate; Isopropyl acid,
Octyl paramethoxycinnamate, 2-ethylhexyl paramethoxycinnamate, mono-2 diparamethoxycinnamate
-Glyceryl ethylhexanoate, [4-bis (trimethylsiloxy) methylsilyl-3-methylbutyl] -3,
And cinnamic acid-based ultraviolet absorbers such as 4,5-trimethoxycinnamic acid ester.

As the aqueous ultraviolet absorbent, 2, 4
-Dihydroxybenzophenone, 2-hydroxy-4-
Methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2-hydroxy-
Benzophenone ultraviolet absorbers such as sodium 4-methoxybenzophenone-5-sulfonate, urocanic acid,
Ethyl urocanate, 2-phenyl-5-methylbenzoxazole, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 4-tert-butyl-4 '
-Methoxybenzoylmethane and the like.

Examples of the sequestering agent include alanine, sodium edetate, sodium polyphosphate and the like.
Examples of the neutralizing agent include 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, potassium hydroxide, sodium hydroxide, triethanolamine, sodium carbonate, and the like. .

Examples of the pH adjuster include lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, dl-malic acid, potassium carbonate, sodium hydrogen carbonate, ammonium hydrogen carbonate and the like. As antioxidants, ascorbic acid, α-
Examples include tocopherol, dibutylhydroxytoluene, and butylhydroxyanisole. Examples of the antibacterial agent include benzoic acid, salicylic acid, carboxylic acid, sorbic acid, paraoxybenzoic acid ester, parachloromethcresol, hexachlorophen, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, and phenoxyethanol.

The drugs include vitamin A oil, retinol, retinol palmitate, inosit, pyridoxine hydrochloride, benzyl nicotinate, nicotinamide, dl-α-tocopherol nicotinate, magnesium ascorbate phosphate, magnesium D2 (ergocasiferol) ), Dl-α-tocopherol, dl-α-tocopherol acetate, pantothenic acid, vitamins such as biotin,
Hormones such as estradiol and ethinyl estradiol, amino acids such as arginine, aspartic acid, cystine, cysteine, methionine, serine, leucine, tryptophan, allantoin, glycyrrhetinic acid, anti-inflammatory agents such as azulene, whitening agents such as arbutin, zinc oxide,
Astringents such as tannic acid, cooling agents such as L-menthol, camphor and sulfur, lysozyme chloride, pyridoxine hydrochloride,
γ-oryzanol and the like.

[0034] Various extracts include dokudami extract,
Oak extract, melilot extract, hydrangea extract, licorice extract, peonies extract, sabonso extract, loofah extract, quinae extract, saxifrage extract, kura extract, kohone extract, fennel extract,
Primrose extract, rose extract, jade extract, lemon extract, sicon extract, aloe extract, shobu root extract, eucalyptus extract, horsetail extract, sage extract, thyme extract, tea extract, seaweed extract, cucumber extract, clove extract, raspberry extract, melissa extract, carrot Extracts, carrot extract, maronier extract, peach extract, peach extract, mulberry extract, cornflower extract, hamamelis extract, placenta extract, silk extract and the like.

The above-mentioned drugs can be used in a free state, those capable of forming a salt can be used in the form of an acid or a base, and those having a carboxylic acid group can be used in the form of an ester thereof. Further, if necessary, an appropriate fragrance, a colorant, and the like can be added to the emulsion composition of the present invention as long as the emulsion stability is not impaired.

In the emulsified cosmetic of the present invention, since it is possible to secure the stability without adding a surfactant which is a hindrance in securing high safety, the emulsion is substantially free of a surfactant. It is desirable. However, a small amount of a surfactant such as monoglyceride, sorbitan fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, and polyoxyethylene fatty acid ether may be added.

As the form of the oil-in-water emulsion cosmetic of the present invention, that is, various dosage forms can be employed without any particular limitation, specifically, emulsions, skin creams, hair creams, liquid foundations, eye liners , Mascara, eyeshadow and other milky or creamy products. These products are produced from the above-mentioned components by a conventional method.

[0038]

EXAMPLES Hereinafter, specific examples and comparative examples of the oil-in-water emulsified cosmetic of the present invention, and performance tests using the same and the results thereof will be described. It is needless to say that the present invention is not limited at all by the results but can be grasped based on the description in the claims.

[Examples 1 to 6 and Comparative Examples 1 to 4] Skin care creams and comparative skin care creams, which are oil-in-water emulsified cosmetics of the present invention, were manufactured according to the formulations shown in Table 1, and the obtained skin care creams were prepared. , A stability test and a practical use test by a panel of women (10 persons). In the stability test, the appearance after being left for one month at 50 ° C. was evaluated. In the actual use test, the preference during use was evaluated according to the following evaluation criteria. The results are also shown in Table 1. All amounts are by weight.

[0040]

[Table 1]

[(1) Stability over time] ・ ・ ・: No change over time ・ ・ ・: Slightly separated ×: Separated

[(2) Familiarity with the Skin] The goodness of the familiarity with the skin during use was evaluated by an actual use test by ten expert panelists. The evaluation criteria are as follows. ◎: Eight or more professional panelists recognized that the adaptation to the skin in use was good.・ ・ ・: 6 or more and less than 8 specialized panelists recognized that the adaptation to the skin in use was good. B: Three or more and less than six professional panelists recognized that the skin in use was well adapted. X: Less than 3 professional panelists recognized that the adaptation to the skin in use was good.

[(3) Smoothness of the skin] The actual use test was carried out by 10 expert panelists on the smoothness of the skin during and after use. The evaluation criteria are as follows. A: Eight or more professional panelists recognized that the skin was smooth during and after use.・ ・ ・: Six or more and less than eight specialized panelists recognized that the skin was smooth during and after use. B: Three or more and less than six professional panelists recognized that the skin was smooth during and after use. ×: Three or more professional panelists recognized that the skin was smooth during and after use.

[(4) Non-stickiness to Skin] Regarding the non-stickiness to the skin during and after use, a specialist panel 1
The actual use test was performed by 0 persons. The evaluation criteria are as follows. A: Eight or more professional panelists recognized that there was no stickiness to the skin during and after use.・ ・ ・: 6 or more and less than 8 professional panelists recognized that there was no stickiness to the skin during and after use. B: Three or more and less than six professional panelists recognized that there was no stickiness to the skin during and after use. ×: Less than 3 professional panelists recognized that there was no stickiness to the skin during and after use.

[Production methods of Examples 1 to 6 and Comparative Examples 2 to 4]
A part of (2), (3), (4) and (12) is emulsified by a homomixer, and (11) is added. Next, (6)
Any one of (9) to (9) dispersed or dissolved in the remainder of (12) is added, and finally (1) and (10) are added. [Production method of Comparative Example 1] A part of (1), (2), (3), (5) and (12) is emulsified by a homomixer. Then, (6) is changed to (1
Add what was dispersed in the rest of 2), and finally add (10).

The results of the above performance tests are shown in Table 1 as described above. According to Table 1, all of the skin care creams of the examples in which the alkyl-modified carboxyvinyl polymer and glucomannan are blended are shown. It is understood that the aging stability is excellent and the usability is synergistically improved. In addition, it can be seen that the skin care creams of the examples do not contain a surfactant that hinders achievement of a high degree of safety.

On the other hand, the skin care cream of Comparative Example containing only one of the alkyl-modified carboxyvinyl polymer and glucomannan has insufficient performance (△) or unsatisfactory in either stability or usability. Only good performance (x) was expressed.

More specifically, the skin care cream of Comparative Example 1, which did not contain the alkyl-modified carboxyvinyl polymer, exhibited only poor performance in terms of good familiarity with the skin and smoothness. Further, the skin care creams of Comparative Examples 2 and 3 not containing glucomanan exhibited only unsatisfactory performance in any of the usability. Furthermore, the skin care creams of Comparative Examples 2 and 4 exhibited only insufficient performance in stability.

Example 7 Hair Treatment Lotion Compounding Amount (%) (1) Propylene glycol 2.0 (2) Glycerin 1.0 (3) Alkyl-modified carboxyvinyl polymer ^{* 1} 0.1 (4) Stearyl trimethyl chloride Ammonium 0.5 (5) Methylphenyl polysiloxane 1.0 (6) Keratin hydrolyzate ^{* 2} 1.0 (7) Methyl paraben 0.1 (8) Octyl methoxycinnamate 0.01 (9) Ethanol 15.0 (10) Potassium hydroxide 0.02 (11) Glucomannan ^{* 3} 0.05 (12) Residue of ion-exchanged water (13) Perfume 0.01 * 1: Pemulen TR-1 (trade name, manufactured by BF Goodrich) * 2: Fluorois WK-H (trade name, manufactured by Seiwa Kasei Co., Ltd.) * 3: White Fluoro Wheel A (trade name, manufactured by Shimizu Chemical Co., Ltd.)

<Production method of Example 7> (3), (5) and (12)
Is emulsified with a homomixer, and (10) is added. Then, (1), (2), (4), (6) to (9), (11), (1)
A mixture obtained by uniformly mixing 3) is added to the above emulsion. The obtained hair treatment lotion was excellent in stability over time, and had good adaptability to hair, was smooth, and had a good non-sticky feeling.

Example 8 Emulsion Foundation Compounding Amount (%) (1) Titanium oxide treated with silicone coating 18.0 (2) Iron oxide treated with silicone coating (red) 0.3 (3) Iron oxide treated with silicone coating (black) 0.015 (4) Iron oxide treated with silicone coating (yellow) 1.2 (5) Alkyl-modified carboxyvinyl polymer ^{* 1} 3.0 (6) Decamethylcyclopentasiloxane 50.0 (7) Silicone resin ^* 25 0.0 (8) Potassium hydroxide 1.3 (9) Ion-exchanged water balance (10) 1,3-butylene glycol 5.0 (11) Glucomannan ^{* 3} 0.3 * 1: Pemulen TR-2 (product) * 2: Organic silicone resin represented by molecular weight, about 5,000, average formula (CH ₃ ) _1.8 SiO _1.1 * 3: Leorex RX (trade name, manufactured by Shimizu Chemical Co., Ltd.) )

<Production method of Example 8> A mixture obtained by dispersing (1) to (4) in the mixture of (6) and (7) was added to a part of (5) and (9). And emulsify with (8) and add (8). Next, (11) is dispersed in the remainder of (9), and the product obtained by adding (10) is added to the above emulsion. The obtained emulsified foundation has excellent stability over time,
Moreover, it is well-adapted to skin, smooth, non-sticky,
The feeling was good.

[0053]

As described above, the present invention forms an emulsion using an alkyl-modified carboxyvinyl polymer as an emulsifier, and incorporates glucomannan into the emulsion. In addition, it is possible to produce a cosmetic having an excellent feeling in use, particularly excellent in familiarity and smoothness to skin or hair, and having no sticky feeling. As a result, it is possible to provide a cosmetic having excellent stability without the need for blending a surfactant that hinders securing high safety. As described above, the present invention has a remarkable effect.

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Claims (4)

[Claims] 1. A compound represented by the following general formula (1) having a molecular weight of 5
An oil-in-water type emulsified cosmetic comprising from 100,000 to 3,000,000 alkyl-modified carboxyvinyl polymers and one or more glucomannans. (However, in the general formula (1), R ¹ is a hydrogen atom or an alkyl group having 10 to 30 carbon atoms, and n, n ′, m and m ′ are n + n ′ + m + m ′
= 40 to 100, and l represents an arbitrary number such that the molecular weight falls within a predetermined range. ) 2. The method according to claim 1, wherein the composition is substantially free of a surfactant.
The oil-in-water emulsified cosmetic according to the above. 3. An amount of the alkyl-modified carboxyvinyl polymer in the emulsified composition of 0.01 to 10.0% by weight,
The amount of glucomannan in the emulsified composition is 0.01 to
The oil-in-water emulsified cosmetic according to claim 1 or 2, which is 5.0% by weight. 4. The amount of the oily component in the emulsion composition is 1.
The oil-in-water emulsified cosmetic according to claim 1, which is 0 to 60.0% by weight.