JPH09278644A - Cosmetic of o/w-type emulsion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a cosmetic of O/W-type emulsion excellent in salt resistance, light resistance and emulsion stability, good in adhesive properties to the skin and having good feeling in use which is free from stickiness although it has moist feeling. SOLUTION: This cosmetic is prepared by using a metal salt of an alkenylsuccinic acid starch, a modified starch, as a thickening agent. As the metal salt of the alkenylsuccinic acid starch, an octenylsuccinic acid starch aluminum is especially preferable. The modified starch is dispersed in water to be wetted by using a hydrophilic surfactant, a polyhydric alcohol, etc., and thickened by heating preferably at >=70 deg.C. An adequate compounding ratio is about 0.1-10.0wt.%, however, the modified starch can exert dispersion stabilization effect on powder when it is compounded at a ratio of >=0.5wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-in-water type emulsion cosmetic having excellent emulsion stability, good adhesion to the skin and good compatibility, and a moisturizing and non-greasy feeling during use. More specifically, the present invention relates to an oil-in-water type emulsion cosmetic, which is thickened and stabilized by one or more metal salts of alkenylsuccinic acid starch.

[0002]

2. Description of the Related Art Conventionally, in emulsion cosmetics, a polymer thickener is used to adjust the viscosity of the preparation and to improve the emulsion stability and the dispersion stability when powders and the like are blended. Is used. Such polymeric thickeners are mainly natural polysaccharides such as guar gum, locust bean gum, carrageenan and other plant polysaccharides, xanthan gum, dextran, curdlan and other microbial polysaccharides, gelatin, casein, collagen and other animal proteins. Molecule, methyl cellulose, hydroxyethyl cellulose,
Cellulose such as carboxymethyl cellulose, soluble starch, starch such as carboxymethyl starch and methyl starch, semi-synthetic polymer such as alginic acid such as propylene glycol alginate, carboxy vinyl polymer, vinyl such as sodium polyacrylate and ethylene oxide -A synthetic polymer such as a propylene oxide block copolymer is used.

However, in the case of thickening with a polymer thickener, the temperature dependence of the viscosity and the fluctuations due to salts are large, and in some cases, structural aging phenomenon is observed with time, and low viscosity due to exposure. In many cases, the stability was deteriorated over time. Further, at a concentration at which an effective thickening can be obtained, adhesion and familiarity to the skin are particularly insufficient,
Furthermore, it has a drawback that it is sticky and it is difficult to obtain a refreshing feeling.

[0004]

Therefore, in the present invention, the problems found in the above-described thickening and stabilizing system using a polymeric thickener are solved, and the temperature dependence of the viscosity is small, and the emulsion stability is stable. Water, which has excellent stability, salt resistance, and light resistance, has good dispersion stability when blended with powder, etc., and has good adhesion and familiarity to the skin and a moisturizing, non-greasy feeling in water. The purpose was to obtain an oil-based emulsion cosmetic.

[0005]

In order to solve the above problems, the present inventor can obtain good results by using a metal salt of alkenylsuccinic acid, which is a modified starch, as a thickener. The present invention has been completed and the present invention has been completed.

The metal salt of alkenyl succinate starch is
It is used in powder cosmetics to improve the feeling of use.
Also disclosed is the use as a sunscreen (Japanese Patent Publication No. 8-
2776), and recently, it has been reported to suppress stickiness of white petrolatum together with alkyl lactate (International Publication 95/06458). This time, the present inventors have found that an excellent thickening effect can be obtained by dispersing and wetting in water with a polar organic solvent such as a hydrophilic surfactant or a polyhydric alcohol, and then heating to 70 ° C. or higher. discovered.

As the metal salt of alkenylsuccinic acid starch, those having an alkenyl group having 5 to 22 carbon atoms are preferable, and divalent or trivalent metal salts are preferable for the purpose of the present invention. In particular, the aluminum salt of octenyl succinic acid starch is commercially available under the trade name of "DRY FLOW PC", and a good thickening effect as well as an excellent feeling of use can be obtained, which is particularly preferable.

The metal salt of alkenyl succinate starch is
A hydrophilic surfactant or an organic solvent having a high polarity such as a polyhydric alcohol is dispersed in water to be moistened, and further heated to increase the viscosity. It is also preferable that the heating temperature is 70 ° C. or higher. As the compounding amount, 0.1 to 10.0
The amount of about 0.5% by weight is suitable, but when a powder is added, it is necessary to add 0.5% by weight or more to obtain a sufficient dispersion stabilizing effect.

As the hydrophilic surfactant, it is particularly preferable to use an anionic surfactant, such as fatty acid soap,
Alkyl ether carboxylate, N-acyl sarcosine salt, N-acyl-N-methyl-β-alanine salt, N-acyl glutamate, N-acyl alkyl taurine salt, higher alkyl sulfonate, α-alkene sulfonate , Sulfonic acid salts of higher fatty acid esters, dialkyl sulfosuccinic acid salts, sulfonic acid salts of higher fatty acid amides, phosphoric acid ester salts, etc., and fatty acid soaps and amino acid-based surfactants are used from the viewpoint of feeling of use and irritation. preferable. These can be used in combination with a hydrophilic nonionic surfactant and the like.

As the highly polar organic solvent, polyhydric alcohols and alkyl ethers thereof are preferably used. For example, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, 3- Methyl-
1,3-butylene glycol (isoprene glycol), hexylene glycol, glycerin, diglycerin, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether (ethyl cellosolve), ethylene glycol monobutyl ether (butyl cellosolve),
Ethylene glycol dimethyl ether, diethylene glycol monomethyl ether (methyl carbitol), diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol dimethyl ether, diethylene glycol diethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monoisopropyl ether, dipropylene glycol Examples thereof include monomethyl ether and dipropylene glycol monoethyl ether.

The hydrophilic surfactant and the highly polar organic solvent such as polyhydric alcohol can be used in the amounts usually used in cosmetics.

In the present invention, oils include avocado oil, almond oil, olive oil, sesame oil, sasanqua oil,
Vegetable oils such as safflower oil, soybean oil, camellia oil, corn oil, rapeseed oil, castor oil, cottonseed oil, peanut oil, cocoa butter, palm oil, palm kernel oil, oak, coconut oil, hydrogenated castor oil, etc., turtle Animal oils such as oil, mink oil, egg yolk oil, beef tallow, lard, carnauba wax, candelilla wax, jojoba oil and other vegetable wax, beeswax, whale wax, lanolin, liquid lanolin and other animal waxes, Liquid paraffin, petrolatum, ceresin, microcrystalline wax, hydrocarbon oils such as squalane, lauric acid,
Fatty acids such as myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, lanolin fatty acid and isostearic acid, higher alcohols such as cetanol, stearyl alcohol, oleyl alcohol, lanolin alcohol, isostearyl alcohol and 2-octyldodecanol , Isopropyl myristate, isopropyl palmitate, decyl oleate, octyldecyl myristate, glyceryl tri-2-ethylhexanoate, etc. esters, dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, cyclic dimethylpolysiloxane, etc. Silicone oil, etc. These can be blended to the extent that the features of the present invention are not impaired.

Further, when it is provided as a sunscreen cosmetic or a makeup cosmetic, fine particles of titanium oxide, fine particles of zinc oxide, zirconium oxide, etc. having an ultraviolet scattering effect, talc, kaolin, mica, sericite. Powders such as extender pigments such as etc., white pigments such as titanium oxide and zinc oxide, color pigments such as yellow iron oxide, red iron oxide, black iron oxide, gnome, konjou, pearl pigments such as mica titanium and iron oxide treated mica titanium. You can

Further, in the present invention, in addition to the above, a moisturizer, an ultraviolet absorber, an antiseptic / antifungal agent, an ultraviolet absorber, a pigment, a fragrance and the like can be added as long as the characteristics of the present invention are not impaired.

[0015]

In the present invention, the metal salt of alkenyl succinic acid starch shows an excellent emulsion stabilizing effect by gelling and thickening by heating after wetting. Further, when an insoluble component such as powder is blended, it exhibits a stabilizing effect on their dispersion. And this gel structure has temperature stability and salt resistance,
An oil-in-water type emulsion cosmetic which is excellent in light resistance and hardly shows an aging phenomenon over time, has a small temperature dependence of viscosity, is not affected by salt concentration and exposure, and is stable over time.

Further, due to the properties of the metal salt of alkenyl succinic acid starch, it exhibits good adhesion to the skin, is well absorbed, and has a moist and non-greasy feeling during use.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to skin cosmetics such as emulsions and creams, makeup base lotions, makeup base creams, makeup foundations such as liquid foundations and creamy foundations, sunscreen lotions, sunscreen creams. Can be provided as sunscreen cosmetics and the like.

[0018]

EXAMPLES The present invention will be described in more detail with reference to Examples. First, Table 1 shows the formulations of Examples 1 to 3 as the emulsion according to the present invention. These are prepared as follows. First, the oil phase components (1) to (6) are mixed and heated to 70 ° C. On the other hand, (7) to (11) were added to (14), mixed and heated to 70 ° C., the oil phase was added to this and emulsified, and after cooling 4
Dissolve (13) in (12) at 0 ° C and add.

[Table 1]

Table 2 shows the formulations of Examples 4 and 5 as the cleansing cream according to the present invention. The preparation method is as follows. Mix the oil phase components (1) to (7),
Heat and melt to 75 ° C. (8) to (13) are added to (15), mixed and heated to 75 ° C., and the oil phase is added thereto with stirring to emulsify. After cooling, (14) is added and mixed at 40 ° C.

[Table 2]

[Example 6] Cream (1) Stearic acid 1.2 (wt%) (2) Glyceryl monostearate 3.0 (3) Cetanol 2.0 (4) Liquid paraffin 6.0 (5) Vaseline 3.0 (6) Glycerin 15.0 (7) 1,3-Butylene glycol 3.0 (8) Starch aluminum pentenyl succinate 1.5 (9) Potassium hydroxide 0.1 (10) Methyl paraoxybenzoate 0.1 (11) Perfume 0.1 (12) Purified water 65.0 Production method: (1) to (5) are mixed, heated and dissolved to 70 ° C.
Add (6) to (10) to (12), mix and heat to 70 ° C.
The above oil phase is added to this with stirring, and after the neutralization reaction is sufficiently carried out, it is cooled and (11) is added at 40 ° C.

Example 7 Makeup Base Lotion (1) Squalane 2.0 (wt%) (2) Purified Lanolin 1.0 (3) Microcrystalline Wax 1.7 (4) Isostearic Acid 1.0 (5) ) Glyceryl monostearate 1.0 (6) Behenyl alcohol 1.5 (7) Glyceryl tri-2-ethylhexanoate 2.0 (8) Silicone oil 8.0 (9) 1,3-butylene glycol 7.0 ( 10) Glycerin 0.5 (11) N-acyl sarcosine sodium 0.5 (12) Starch aluminum heptenyl succinate 0.8 (13) Potassium hydroxide 0.1 (14) Methyl paraoxybenzoate 0.1 (15) Purified Water 67.1 (16) Talc 2.7 (17) Silicic anhydride 1.5 (18) Iron oxide coated mica titanium 1.0 (19) Red iron oxide 0.1 (20) Yellow iron oxide 0.4 Production method: ( Mix the water phase components from 9) to (15), dissolve by heating, and add Flip and because mixing (16) to and dispersing additive (20),
The temperature is 75 ° C. On the other hand, the oil phase components (1) to (8) are mixed, dissolved under heating to 75 ° C., and added to the aqueous phase while stirring to emulsify.

[Example 8] Milk liquid foundation (1) Stearic acid 2.2 (% by weight) (2) Isohexadecyl alcohol 7.0 (3) Glyceryl monostearate 2.0 (4) Liquid lanolin 2 0.0 (5) Liquid paraffin 8.0 (6) Propylene glycol 10.0 (7) N-acylmethyl taurine 0.9 (8) 2-decenyl starch aluminum aluminum succinate 0.6 (9) Methyl paraoxybenzoate 0.0. 1 (10) Purified water 56.7 (11) Perfume 0.1 (12) Talc 3.0 (13) Titanium dioxide 5.0 (14) Red iron oxide 0.5 (15) Yellow iron oxide 1.4 (16) Black iron oxide 0.5 Manufacturing method: The aqueous phase components (6) to (10) are mixed and heated to 70 ° C. to increase the viscosity. Powder components (12) to (16) are mixed and pulverized and added to this, and uniformly dispersed to 75 ° C. On the other hand (1)
The oil phases (5) to (5) are mixed, heated and melted to 75 ° C., and added to the aqueous phase with stirring to emulsify. After cooling, at 40 ° C
Add (11).

Example 9 Creamy Foundation (1) Squalane 10.0 (wt%) (2) Jojoba Oil 5.0 (3) Cetanol 1.0 (4) Glyceryl Monostearate 2.5 (5) ) Isopropyl myristate 8.0 (6) N-acyl-N-methyl-β-alanine sodium 2.0 (7) Diethylene glycol monoethyl ether 5.0 (8) 2-Lauroylinyl starch succinate magnesium 2.0 (9) Methyl paraoxybenzoate 0.1 (10) Purified water 44.3 (11) Perfume 0.1 (12) Titanium oxide 8.0 (13) Kaolin 5.0 (14) Talc 2.0 (15) Red iron oxide 2.6 (16) Black iron oxide 2.1 (17) Yellow iron oxide 0.3 Manufacturing method: Mix the aqueous phase components of (6) to (10) and heat to 70 ° C to increase the viscosity. Powder components (12) to (17) are mixed and pulverized and added to this, and uniformly dispersed to 75 ° C. On the other hand (1)
The oil phases (5) to (5) are mixed, heated and melted to 75 ° C., and added to the aqueous phase with stirring to emulsify. After cooling, at 40 ° C
Add (11).

Example 10 Sunscreen Emulsion (1) Vaseline 0.5 (wt%) (2) Cetanol 1.0 (3) Sorbitan sesquioleate 0.8 (4) Glyceryl tri-2-ethylhexanoate 5.0 (5) Dimethylpolysiloxane 3.0 (6) 2-Ethylhexyl paramethoxycinnamate 6.0 (7) Oxybenzone 3.0 (8) Dipropylene glycol 6.0 (9) Polyoxyethylene (20E.O .) Sorbitan 1.0 monooleate (10) sodium N-acyl-L-glutamate 0.2 (11) 5-calcium starch myristoyl succinate 0.8 (12) methyl paraoxybenzoate 0.1 ( 13) Purified water 62.5 (14) Perfume 0.1 (15) Fine particle titanium oxide 10.0 Manufacturing method: Mix the aqueous phase components of (8) to (13) and heat to 70 ° C. to increase the viscosity. Add (15) to this and evenly disperse to 7
5 ° C. On the other hand, the oil phases (1) to (7) are mixed, heated and melted to 75 ° C., and added to the aqueous phase with stirring to emulsify.
After cooling, add (14) at 40 ° C.

With respect to Examples 1 to 5 of the present invention, stability with time of viscosity or hardness, temperature stability, salt resistance and light resistance were evaluated. At this time, in Table 1, the starch aluminum octenyl succinate of (10) was added to 0.1% by weight of a carboxyvinyl polymer and 0.1% by weight of sodium polyacrylate.
In place of 025% by weight, the total amount of purified water was 100% by weight.
15% by weight and 100% by weight of purified water so that the total amount was 100% by weight, and Comparative Example 3 was the one in which the starch aluminum octenylsuccinate of (12) in Table 2 was replaced by 1.0% by weight of starch. did.

(1) Stability of viscosity or hardness with time: Examples and Comparative Examples were stored at 25 ° C., and one day after preparation, 7
After 1 day and 14 days, the viscosity was measured for Examples 1 to 3 and Comparative Examples 1 and 2, and the hardness was measured for Examples 4, 5 and 3. The results are shown in Table 3.

(2) Temperature stability When the examples and comparative examples were stored at -5 ° C, 5 ° C and 50 ° C for 1 month, respectively,
Changes in the state were observed when the temperature was changed between 40 ° C and -5 ° C and when freeze and thaw were repeated 5 times. The results are shown in Table 4 in which no change in the viscosity or hardness, phase separation, or the like was observed at all, Δ when these changes were slightly observed, and x when the change was remarkable.
It was shown to.

(3) Salt resistance To each of the examples and comparative examples, sodium chloride was added at a final concentration of 0.2% by weight,
The change in the condition when left at 25 ° C. for 1 week was observed in the same manner as above. The results were evaluated in the same manner as above, and are summarized in Table 4.

(4) Light resistance The examples and comparative examples were placed in transparent glass sample bottles and exposed to sunlight for 1 week. The state change of each sample after 1 week was evaluated in the same manner as above. The evaluation results of temperature stability, salt resistance and light resistance are summarized in Table 4.

[0030]

[Table 3] From Table 3, in any of the examples of the present invention, no decrease in viscosity or hardness over time was observed. In contrast, in Comparative Example 3 in which the starch was thickened in place of the aluminum starch octenylsuccinate, the decrease in hardness with time was remarkable.

[0031]

[Table 4] Further, from Table 4, all of the examples of the present invention showed good temperature stability, and no change in state was observed at any temperature. Further, it was stable against temperature change between 40 ° C. and −5 ° C. and freeze-thaw, and maintained a good state even when 0.2% by weight of sodium chloride was added, and excellent salt resistance was observed. Further, even when exposed to sunlight for 1 week, no decrease in viscosity was observed and the light resistance was excellent. On the other hand, in Comparative Examples in which the conventional water-soluble thickener was used in place of starch aluminum octenylsuccinate, the stability was particularly poor at high temperatures, and the deterioration of the state was also observed due to temperature changes and freeze-thawing. . Also, by adding 0.2% by weight of sodium chloride,
Viscosity, hardness decrease, phase separation, etc. were remarkably observed, and viscosity was promptly reduced by exposure.

Subsequently, usage tests were conducted on Examples 6 to 10 of the present invention. At this time, in each example,
1/8 by weight of alkenylsuccinic acid starch metal salt
Comparative Examples 4 to 8 were prepared by substituting the carboxyvinyl polymer in an amount of 100% by weight with purified water. In the use test, 20 female panelists aged 20 to 50 were used as a group, and each panel was made to use each of the examples and comparative examples, and the familiarity with the skin, the close contact feeling, the elongation on the skin, and the irritation feeling during use. Was sensory evaluated. The evaluation results are “good; 5 points”, “slightly good; 4 points” regarding the familiarity with the skin and the elongation on the skin.
"Normal; 3 points", "Slightly bad; 2 points", "Bad; 1
“Point”, and “Are; 5 points” and “Slightly;
4 points "," neither can be said; 3 points "," somewhat not;
"2 points", "no; 1 point", "I do not feel; 0 point", "delicately feel; 1 point", "feel a little; 2 points", "feel; 3 points", It was scored as "Very strong gnawing; 4 points", and the average value of 20 persons was calculated and shown in Table 5.

[Table 5]

In Table 5, for each of the examples of the present invention, good familiarity with the skin and excellent adhesion were observed. In addition, a better elongation was recognized on the skin than in each comparative example. On the other hand, in the comparative example use group, it was shown that a large number of panelists felt that they had insufficient familiarity with the skin and a feeling of close contact. Regarding the feeling of irritation during use, no significant irritation was observed in any of the Examples and Comparative Examples.

In addition, in Examples 6 to 10 of the present invention, even after storage at room temperature for 3 months, no decrease in viscosity or hardness, phase separation, separation of pigment or powder component, etc. were observed.

[0035]

INDUSTRIAL APPLICABILITY As described in detail above, according to the present invention, oil-in-water having excellent salt resistance, light resistance and emulsion stability, good adhesion to skin and familiarity, and a moist yet non-greasy feeling in use. A type emulsified cosmetic could be obtained.

Claims (4)

[Claims] 1. An oil-in-water emulsion cosmetic which is thickened and stabilized with one or more metal salts of alkenylsuccinic acid starch. 2. An oil-in-water emulsion cosmetic which is thickened and stabilized with one or more metal salts of alkenyl succinic acid starch and one or more hydrophilic surfactants. 3. An oil-in-water emulsion cosmetic which is thickened and stabilized with one or more metal salts of alkenylsuccinic acid starch and one or more metal polyhydric alcohols. 4. The oil-in-water emulsified cosmetic composition according to claim 1, wherein one or more metal salts of alkenyl succinic acid starch is starch aluminum octenyl succinate.