JPH11228378A - Emulsion cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare an emulsion cosmetic having skin whitening activities, excellent in stability with time and good in sense of use. SOLUTION: This emulsion cosmetic comprises (a) 0.5-5 wt.% phosphoric ester salt of L-ascorbic acid and/or sulfuric ester salt of the L-ascorbic acid, (b) 0.001-5 wt.% salt of alkylmethyltaurine, (c) 0.01-79 wt.% oil and (d) 20-90 wt.% water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention has a whitening effect,
Also, the present invention relates to an emulsified cosmetic having excellent stability over time and a good feeling in use.

[0002]

2. Description of the Related Art Conventionally, various vitamin C (L-ascorbic acid) derivatives have been blended for the purpose of imparting a whitening effect to cosmetics. As an example, water-soluble vitamin C derivatives such as L-ascorbic acid phosphate and L-ascorbic acid sulfate, and oil-soluble vitamin C derivatives such as monoester and diester of L-ascorbic acid and palmitic acid are widely used. It had been. Although the above-mentioned water-soluble vitamin C derivative is superior in stability to oxidative decomposition as compared with L-ascorbic acid, when it is incorporated into an emulsified cosmetic, the emulsion is affected by the salt constituting the derivative. It has been known that coagulation occurs and the stability decreases. Therefore, water-soluble polymers having a yield value, for example, xanthan gum or carboxyvinyl polymer are used in combination, or a large amount of oil such as higher alcohol or wax is blended, and an attempt has been made to improve the stability by increasing the viscosity. Was.

[0003]

However, even when a water-soluble polymer having a yield value is blended, it is difficult to maintain the stability of the system over time due to a decrease in viscosity due to the influence of the salt described above. there were. In addition, when a large amount of the oil agent is blended, there is a disadvantage that stickiness is generated or a refreshing feeling cannot be obtained, and there is a restriction on the touch surface. Therefore,
There has been a demand for the development of emulsified cosmetics that contain a water-soluble ascorbic acid derivative having a whitening effect and that are excellent in stability and usability.

[0004]

Means for Solving the Problems In view of the above circumstances, the present inventors have conducted intensive studies and as a result, have found that in a system containing L-ascorbic acid phosphate and / or L-ascorbic acid sulfate, By using an alkylmethyltaurine salt, it was found that an emulsified cosmetic excellent in stability and usability was obtained, and the present invention was completed.

That is, the present invention provides the following components (a) to
(D); (a) L-ascorbic acid phosphate salt and / or L-ascorbic acid sulfate salt 0.5 to 5% by weight (b) Alkyl methyl taurine salt 0.001 to 5% by weight (c) Oil agent An emulsion cosmetic comprising 0.01 to 79% by weight (d) 20 to 99% by weight of water. The details will be described below.

[0006]

The L-ascorbic acid phosphate and / or L-ascorbic acid sulfate of component (a) used in the present invention include, for example, sodium L-ascorbate and L-ascorbate. Magnesium ascorbate phosphate, L-ascorbate calcium phosphate, sodium L-ascorbate sulfate, magnesium L-ascorbate sulfate, calcium L-ascorbate sulfate and the like are mentioned, and one or more of these are appropriately selected and used. be able to.

[0007] The content of the component (a) used in the present invention is 0.5 to 5% by weight (hereinafter simply referred to as "%"), and more preferably 1 to 3%. If the content of the component (a) is less than 0.5%, a sufficient whitening effect cannot be obtained, and if the content exceeds 5%, further improvement in the whitening effect cannot be expected.

Examples of the alkylmethyltaurine salt of the component (b) used in the present invention include sodium coconut fatty acid methyltaurine, sodium lauroylmethyltaurine, sodium myristoylmethyltaurine, sodium palmitoylmethyltaurine, sodium stearoylmethyltaurine and the like. And one or more of these can be appropriately selected and used. Among them, particularly preferred are sodium stearoylmethyltaurine and sodium palmitoylmethyltaurine.

[0009] The content of the component (b) used in the present invention is 0.001% to 5%, more preferably 0.01% to 5%.
1-3%. If the content of the component (b) is less than 0.001%, the dispersion stability of the emulsified particles cannot be sufficiently ensured. If the content exceeds 5%, the stickiness of the alkylmethyltaurine salt itself will be increased. Is generated, which is not preferable in touch.

The oil agent of the component (c) used in the present invention is not particularly limited, but examples thereof include natural animal and vegetable oils and fats, semi-synthetic oils and fats, hydrocarbon oils, higher fatty acids, higher alcohols and ester oils. , Silicone oils, fluorine-based oils and the like, specifically, natural animal and vegetable oils and fats, and semi-synthetic oils, such as avocado oil, linseed oil,
Almond oil, botaro wax, eno oil, olive oil, cocoa butter, kapok wax, kaya oil, carnauba wax, liver oil,
Candelilla wax, beef tallow, beef tallow, beef bone fat, hardened tallow,
Ginger oil, whale wax, hydrogenated oil, wheat germ oil, sesame oil,
Rice germ oil, rice bran oil, sugar cane wax, sasanqua oil, safflower oil, shea butter, cinnamon oil, cinnamon oil, jojoba wax, shellac wax, turtle oil, soybean oil, teaseed oil, camellia oil, evening primrose oil, corn oil, Lard, rapeseed oil, Japanese drill oil, bran wax, germ oil, horse fat,
Persic oil, palm oil, palm kernel oil, castor oil, hardened castor oil, castor oil fatty acid methyl ester, sunflower oil, grape oil, bayberry wax, jojoba oil, macadamia nut oil, beeswax, mink oil, cottonseed oil, cotton wax, mokuro, mokuro Kernel oil, montan wax, coconut oil, hydrogenated coconut oil, tricoconut oil fatty acid glyceride, sheep fat, peanut oil,
Lanolin, liquid lanolin, reduced lanolin, lanolin alcohol, hard lanolin, lanolin acetate, lanolin fatty acid isopropyl, hexyl laurate, POE lanolin alcohol ether, POE lanolin alcohol acetate, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, egg yolk oil, etc. As hydrocarbon oils, ozokerite, squalane, squalene, ceresin, paraffin, paraffin wax, liquid paraffin, pristane, polyisobutylene, microcrystalline wax, petrolatum, etc .; as higher fatty acids, lauric acid, myristic acid, palmitic acid, stearin Acid, behenic acid, undecylenic acid, oleic acid, linoleic acid, linolenic acid, arachidonic acid, eicosapentaenoic acid (EPA), Sahekisaen acid (DHA), isostearic acid, 12-hydroxystearic acid; the higher alcohols, lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol, hexadecyl alcohol,
Oleyl alcohol, isostearyl alcohol, hexyl decanol, octyl dodecanol, cetostearyl alcohol, 2-decyltetradecinol, cholesterol, phytosterol, POE cholesterol ether, monostearyl glycerin ether (bacyl alcohol), etc .; Diisobutyl acid, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, N-monoisostearate
Alkyl glycol, isocetyl isostearate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, ethylene glycol di-2-ethylhexanoate, neopentyl glycol di-2-ethylhexanoate, tri-2-ethylhexanoate Methylolpropane, pentaneerythritol tetra-2-ethylhexanoate, cetyl octanoate, octyldodecyl gum ester, oleyl oleate, octyldodecyl oleate, decyl oleate, neopentyl glycol dicaprate, triethyl citrate, 2-ethylhexyl succinate , Amyl acetate, ethyl acetate, butyl acetate, isocetyl stearate, butyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, cetyl lactate, milk Myristyl, isopropyl palmitate, 2-ethylhexyl palmitate, palmitate, 2-hexyldecyl, 2-heptylundecyl palmitate, 12-hydroxy stearyl acid cholesteryl,
Dipentaerythritol fatty acid ester, isopropyl myristate, 2-octyldodecyl myristate, 2-hexyldecyl myristate, myristyl myristate, hexyldecyl dimethyloctanoate, ethyl laurate, hexyl laurate, N-lauroyl-L-glutamic acid- 2-octyldodecyl ester, diisostearyl malate and the like; glyceride oils include acetoglyceride, triisooctanoic acid glyceride, triisostearic acid glyceride, triisopalmitic acid glyceride, tri-2-ethylhexanoic acid glyceride, monostearic acid glyceride, Di-2-heptylundecanoic acid glyceride, trimmyristic acid glyceride and the like; silicone oils such as dimethylpolysiloxane and methylphenyl Higher alkoxy-modified silicones such as polysiloxane, methylhydrogenpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, tetramethyltetrahydrogencyclotetrasiloxane, and stearoxysilicone; Higher fatty acid ester-modified silicone, higher fatty acid-modified silicone, fluorine-modified silicone, silicone resin, silicone rubber, silicone resin, and the like; examples of fluorine-based oils include perfluoropolyether, perfluorodecalin, and perfluorooctane;
One or two or more of these can be appropriately selected and used.

The content of the component (c) used in the present invention is from 0.01 to 79%, more preferably from 0.1 to 79%.
50%. Outside this range, a good feeling of use cannot be obtained.

The water content of the component (d) used in the present invention is from 20 to 99%, preferably from 40 to 99%.
95%.

The emulsified cosmetic of the present invention can be obtained by blending the above essential components, and the shape may be any of liquid, emulsion, cream and gel.

[0014] The emulsified cosmetic of the present invention may contain, in addition to the above essential components, components to be incorporated in the cosmetic, such as oils, surfactants, powders, pigments, dyes, water-soluble polymers, and ultraviolet absorbers. , Humectants, preservatives, fragrances, various chemicals, and the like can be blended within a range that does not impair the effects of the present invention.

[0015]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the invention thereto.

Examples 1 to 4 and Comparative Examples 1 to 4 Emulsified cosmetics Emulsified cosmetics having the compositions shown in the following Table 1 were produced and evaluated over time stability and feeling upon use.

[0017]

[Table 1]

(Production method) A: Components 1 to 7 are heated and mixed at 80 ° C. B: Components 8 to 13 are heated and mixed at 80 ° C. C: A was added to B and stirred, and the mixture was cooled to obtain an emulsified cosmetic.

(Evaluation method) Stability over time The obtained emulsified cosmetic was set in a constant temperature bath at 40 ° C., and its appearance change was visually observed and evaluated according to the following criteria. [Evaluation] ：: No abnormality is observed even after 3 months. ○: No abnormality was observed even in one month. Δ: Abnormality is observed in 2 weeks. ×: Abnormality is observed in one day.

2. Usability The use feeling (non-stickiness) when applied to the skin was evaluated on a 5-point scale according to the following criteria by 10 expert evaluation panels, and the judgment was made based on the average score. [Evaluation] 5 points: Very good. 4 points: good. 3 points: Normal. 2 points: Somewhat poor. 1 point: defective. [Evaluation] ：: Average score of 4.5 or more ○: Average score of 3.5 or more and less than 4.5 Δ: Average score of 2.5 or more and less than 3.5 ×: Average score of less than 2.5 Table 1 also shows the results obtained by each evaluation method.

As is clear from the results in Table 1, the emulsified cosmetics of Examples 1 to 4 according to the present invention were excellent in stability over time and feeling in use. On the other hand, in the comparative examples, none could satisfy all the evaluation items.

Example 5 Emulsion (Ingredient) (%) 1. N-stearoyl-N-methyltaurine sodium 0.012. 2. Polyoxyethylene (60) hydrogenated castor oil 0.5 Sorbitan sesquioleate 0.54. Squalane 4.0 5. Glycerin 5.0 6.1 1,3-butylene glycol 7.0 7.0. 7. L-magnesium phosphate ascorbate 3.0 Sodium citrate 1.0 9. Disodium edetate 0.110. Xanthan gum 0.2 11. Preservative appropriate amount 12. Purified water balance

(Production method) A: Components 1 to 5 are heated and mixed at 80 ° C. B: Components 6 to 12 are heated and mixed at 80 ° C. C: A was added to B and stirred, and the mixture was cooled to obtain an emulsion. Example 5 was an emulsion having excellent stability over time and feeling during use.

Example 6 Cream (Ingredient) (%) 1. N-stearoyl-N-methyltaurine sodium 2.0 2. Sorbitan sesquioleate 1.0 Squalane 30.0 4. Cetyl isooctanoate 5.0 5. Glyceryl trioctanoate 10.0 6. Dimethylpolysiloxane 5.0 7. Cetanol 2.0 8.1 1,3-butylene glycol 5.0 9. 9. L-sodium ascorbate 0.5 Preservative appropriate amount 11. Purified water balance

(Production method) A: Components 1 to 7 are heated and mixed at 80 ° C. B: Components 8 to 13 are heated and mixed at 80 ° C. C: A was added to B and stirred, and the mixture was cooled to obtain a cream. Example 6 was excellent in stability over time and good in feeling during use.

[0026]

As described in detail above, the emulsified cosmetic of the present invention has a whitening effect, is excellent in stability over time, and has a good feeling in use.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Junichiro Egawa 48-18 Sakaemachi, Kita-ku, Tokyo Inside Kose Laboratory, Inc.

Claims (1)

[Claims] 1. The following components (a) to (d): (a) 0.5 to 5% by weight of L-ascorbic acid phosphate and / or L-ascorbic acid sulfate (b) alkylmethyltaurine An emulsified cosmetic comprising 0.001 to 5% by weight of a salt (c) 0.01 to 79% by weight of an oil agent and (d) 20 to 99% by weight of water.