JP2003137728A - Two-layer separated cosmetic and separation promoter thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-layer separated cosmetic capable of stably formulating a medicinal effective ingredient and applying an oil and water in a uniform state to the skin, etc., and having excellent touch during use and further a beautiful appearance, i.e., a two-layer separated cosmetic comprising an upper layer of an emulsified layer and a lower layer of an aqueous layer, readily convertible into an emulsified state by simple shaking during use and returning to the original two-layer separated state in a short time from aspects of stability and the beautiful appearance after the use without limitation on a usable emulsifying agent and having the excellent appearance. SOLUTION: This two-layer separated cosmetic comprises one or more kinds of saccharides or their derivatives, further salts thereof which are not cationic. The cosmetic is usually separated into the emulsified layer and the aqueous layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-layer separation type cosmetic composition, more specifically, it is usually used while maintaining a two-layer separation state in which an upper layer is an emulsion layer (emulsion layer) and a lower layer is an aqueous layer. Sometimes it can be easily emulsified with simple shaking, after use it returns to the original two-layer separated state in a short time from the viewpoint of stability and aesthetics, there is no restriction on the choice of emulsifier that can be used, and the appearance is beautiful and The present invention relates to a two-layer separation type cosmetic composition which has an excellent feel when used.

[0002]

2. Description of the Related Art Conventionally, cosmetics such as lotions, oils, emulsions and creams have been developed for the purpose of protecting the skin. There is also known a two-layer separation type cosmetic composition which is separated into two layers before use and is applied to the skin after being shaken and mixed at the time of use.

Such a two-layer separation type cosmetic composition is a liquid cosmetic composition having two layers and is often composed of two layers of a liquid layer-liquid layer and a liquid layer-powder layer, and is a relatively compounding ingredient. It is applied to various cosmetics without restrictions.

Of these, the liquid layer-liquid layer type two-layer separation type cosmetic composition has one oil layer and the other water layer, which is used by lightly shaking to emulsify it. Such a two-layer separation type cosmetic composition is capable of easily and stably blending water-soluble and oil-soluble medicinal components, and further, by adding a colorant to one or both layers to give a color, It is possible to give a beautiful appearance when it is left standing and separated into two layers.

However, since this type of two-layer separation type cosmetic composition is simply suspended by mechanical simple mixing at the time of use, it returns to the original two-layer separation state in a short time. That is, at the time of use, there is a problem that the water layer and the oil layer are applied to the skin or the like in a state of being mixed nonuniformly. That is, the usability is poor.

In order to solve the above-mentioned problems, a two-layer separation type cosmetic composition containing a surfactant (JP-A-4-11281).
No. 1, etc.) are known. In the two-layer separation type cosmetic composition, when left standing, the upper layer is a cloudy emulsion layer and the lower layer is a water layer, and by mixing by shaking, the emulsion constituting the upper emulsion layer becomes a lower aqueous layer. Disperse to form a uniform dispersion system, and the emulsion dispersed in the water layer gathers over time by standing still again, and after a certain amount of time,
It returns to the original state of being separated into two layers. That is, it becomes easy to apply to the skin or the like in a state where the water layer and the oil layer are uniformly mixed, that is, the usability is improved.

However, depending on the surfactant selected,
After the shaking mixing, the dispersion state of the emulsion in water becomes stable, and it takes a long time to return to the original two-layer separated state upon standing, or there is a problem that the original two-layer separated state is not restored. Further, the feel of the entire cosmetic composition may be deteriorated due to the influence of the surfactant, which may cause an unpleasant sticky feeling or a stiff feeling after application. That is, depending on the selected surfactant, the separation may be deteriorated or the usability may be deteriorated.

In order to solve the above problems, a technique has been developed in which phospholipid is used as an emulsifier and is used in combination with a water-soluble polymer (see Japanese Patent Laid-Open No. 2001-213720).

According to this method, the dispersibility of the emulsified layer in the water layer during shaking mixing is excellent, the restoration to the original two-layer separated state after standing is good, and the case where a surfactant is used is In comparison, the feel of the cosmetic as a whole is improved. However, the selection of phospholipids as an emulsifier has already narrowed the scope of cosmetic design, and in addition, phospholipids are generally expensive, and the phospholipid itself is susceptible to chemical changes such as oxidation. There are problems such as poor stability.

[0010]

The problem to be solved by the present invention is to provide a two-layer separation type cosmetic composition in which the upper layer is an emulsified layer and the lower layer is an aqueous layer, and is easily emulsified by simple shaking at the time of use. After use, it returns to the original two-layer separation state in a short time from the viewpoint of stability and aesthetics, there is no restriction on the selection of emulsifiers that can be used, and the appearance is beautiful and the two-layer separation type is excellent in the feel during use. To provide cosmetics.

[0011]

Means for Solving the Problems The inventors of the present invention have made extensive studies in order to solve the above-mentioned problems, and found that saccharides or their derivatives, and salts thereof, which are not cationic. It was found that the above problems can be solved by using one kind or two or more kinds selected,
The present invention has been completed.

That is, the present invention contains a saccharide, or a derivative thereof, and also a salt thereof and one or more kinds selected from those which are not cationic, and usually comprises an emulsion layer and an aqueous layer. The present invention provides a two-layer separated cosmetic composition characterized by being separated.

The present invention also provides one or more of the following components (a), (b) and (a) sugars or their derivatives, and salts thereof, which are not cationic. (B) The present invention provides a two-layer separation type cosmetic composition which contains a hydrophilic nonionic surfactant and is usually separated into an emulsified layer and an aqueous layer.

The present invention also relates to sugars, their derivatives, and salts thereof, which are not cationic, alginic acid, chitosan, succinyl carboxyalkyl chitosan, cellulose, alkyl cellulose, carboxyalkyl cellulose or hyalurone. The present invention provides the two-layer separation type cosmetic composition which is an acid, or a derivative thereof, or a salt thereof.

The present invention also provides a separation promoter comprising one or more kinds selected from sugars, their derivatives, and their salts, and those which are not cationic.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The two-layer separation type cosmetic composition of the present invention will be described in detail below based on its preferred embodiments.

The two-layer separated cosmetic composition of the present invention contains one or more selected from sugars, their derivatives, and their salts, and those which are not cationic, and is usually an emulsion layer. It is separated into an (emulsion layer) and an aqueous layer. Since the two-layer separation type cosmetic composition of the present invention has the above-mentioned constitution, it can be easily emulsified by simple shaking at the time of use, and after use, the original two-layer structure can be obtained in a short time from the viewpoint of stability and aesthetics. It returns to the separated state, there is no restriction on the selection of emulsifiers that can be used, the appearance is beautiful, and the feeling during use is excellent. In addition, "normally" refers to the time when the state from the uniform emulsified state due to shaking during use to the time when it is allowed to stand still and then returned to the two-layer separated state is excluded.

In the present invention, saccharides, their derivatives, and their salts, which are not cationic (hereinafter also referred to as “component (a)”) are used.
Here, "non-cationic" means anionic,
Nonionic and amphoteric. In the case of the cationic one, the separation speed from the emulsified state to the two-layer separated state at the time of use is slow or the separation is poor, and even if the separation is possible, the appearance of the lower aqueous layer is inferior. Can not.

The component (a) is preferably a polysaccharide, or a derivative thereof, or a salt thereof, which is not cationic, specifically, starch, glycogen,
Inulin, lichenin, alkyl cellulose, carboxyalkyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose sodium, chitin, hemicellulose, pectin, hyaluronic acid, heparin, heparitin sulfate, chondroitin sulfate, keratosulfate, xanthan gum, guar gum, gellan gum, locust bean gum, sclero. Examples include titanium gum, alginic acid, propylene glycol alginate, alginate, chitosan, succinyl chitosan, succinyl carboxyalkyl chitosan and other naturally occurring polysaccharides. Examples of sugars constituting these polysaccharides include monosaccharides and derivatives thereof such as reduced derivatives, oxidized derivatives, and dehydrated derivatives, and hemital hydroxyl groups of sugars and various alcohols, phenols, carboxylic acids, and functional groups such as aldehydes. Glycoside, which is a compound having an ether type bond, and a derivative formed by subjecting an alcoholic hydroxyl group to alkylation, acetylation, nitric acid esterification, and the like are included. These saccharides, their derivatives, and their salts, which are not cationic, may be used alone or in combination of two or more, if necessary.

The above-mentioned component (a) is added to agglomerate the emulsion particles in the emulsified layer and mainly separate them from the aqueous layer. That is, the component (a) has a function as a separation accelerating agent that accelerates the formation of the two-layer separation type cosmetic composition of the present invention into a state where the emulsion layer and the aqueous layer are separated, which is the usual state.

Generally, water-soluble polymers are known to softly agglomerate emulsion particles, but the above-mentioned polysaccharides in particular interact with emulsions dispersed in water by shaking due to their molecular structure. It is preferable because it is easy and has an excellent effect of promoting aggregation of emulsion particles during standing.

According to the present invention, the above-mentioned component (a), that is, a saccharide, or a derivative thereof, and a salt thereof, and a separation promoter comprising one or more selected from those which are not cationic. Will be provided.

In the present invention, the compounding amount of the above-mentioned component (a) is 0.001 to 2% by weight based on the total amount of the cosmetic.
Is preferred, and more preferably 0.03 to 0.5% by weight
Is. If it is less than 0.001% by weight or exceeds 2% by weight, the emulsion particles cannot be aggregated, and the two-layer separation type may not be obtained.

The two-layer separation type cosmetic of the present invention is as described above.
It is preferable to contain a hydrophilic nonionic surfactant (hereinafter, also referred to as “component (b)”) together with the component (a). As the hydrophilic nonionic surfactant in the present invention, a nonionic surfactant capable of forming an oil-in-water emulsion is used, and examples thereof include polyoxyethylene alkyl ether, polyoxypropylene alkyl ether, and polyoxyethylene.・ Polyoxypropylene alkyl ether, polyoxyethylene cholesteryl ether, polyoxyethylene alkylphenyl ether, fatty acid glycerin, fatty acid polyethylene glycol, polyoxyethylene hydrogenated castor oil, fatty acid polyoxyethylene glycerin, fatty acid polyethylene glycol, polyoxyethylene castor oil, polyoxy Ethylene sorbitan fatty acid ester, polyoxyethylene glyceryl ether fatty acid ester, polyoxyethylene hydrogenated castor oil fatty acid ester, fatty acid Oxyethylene hydrogenated castor oil, polyglycerin fatty acid ester, silicone-based surfactant, etc. are not particularly limited as long as they are soluble in water, and the HLB value generally used as an index of hydrophilicity and hydrophobicity of the surfactant. Then, there can be mentioned one having a value of 8 or more.

More specifically, polyoxyethylene glyceryl ether fatty acid ester and polyoxyethylene sorbitan fatty acid ester can be mentioned as preferable ones because a stable oil-in-water emulsion can be easily formed.

These hydrophilic nonionic surfactants may be used alone or in combination of two or more, if necessary.

In the two-layer separation type cosmetic composition of the present invention, in addition to the above-mentioned components, various components generally applied to cosmetic compositions can be appropriately blended within a range that does not impair the effects of the present invention. Such components include avocado oil, olive oil, sesame oil, soybean oil, macadamia nut oil, coconut oil, squalane, squalene, liquid paraffin, oleic acid, stearic acid, palmitic acid, myristic acid, lauric acid, linoleic acid, linolenic acid. , Isocetyl isostearate,
Oil components such as cholesteryl isostearate, cetyl octanoate, decyl oleate, isocetyl stearate, glyceryl trimyristate, myristyl lactate, isopropyl palmitate, isopropyl myristate, octyldodecyl myristate, dimethylpolysiloxane, methylphenylpolysiloxane, amino Modified silicone,
Silicone oils such as alkyl-modified silicone and carboxylic acid-modified silicone, glycerin, diglycerin, dipropylene glycol, sorbitol, 1,3-butylene glycol, propylene glycol, L-arginine, L
-Glutamic acid, sodium L-glutamate, lactic acid,
Moisturizing ingredients such as urea, ceramide, phospholipids, glycyrrhizin, magnesium ascorbate phosphate, tocopherol, tocopherol acetate, arbutin, trehalose,
Sulfated trehalose, menthol, medicinal ingredients such as plant extract, methylparaben, ethylparaben, propylparaben, butylparaben, chlorhexidine gluconate,
Antiseptic such as phenoxyethanol, bactericide, paradimethylaminobenzoate, UV absorber such as oxybenzone, sequestering agent such as EDTA-Na, citric acid, citric acid N
a, a pH adjusting agent such as triethanolamine, and the like.

[0028]

EXAMPLES The present invention will be described more specifically below with reference to Examples and Comparative Examples. The present invention is not limited to these examples.

Table 1 shows the compounding ingredients of the two-layer separation type cosmetics of Examples 1 to 7 and Comparative Examples 1 to 4 and their compounding amounts.

[0030]

[Table 1]

(Production method of Example 1) 1. Mix and dissolve ingredient A. 2. Heat and dissolve component B. 3. Heat and dissolve component C. Add 2 to 4.3 and emulsify. 5.4 was cooled and 1 was added to and mixed with it to obtain a two-layer separation type cosmetic.

(Production method of Example 2) A two-layer separation type cosmetic composition was obtained in the same manner as in Example 1 except that the sugar used in Example 1 was different.

(Production method of Example 3) A two-layer separation type cosmetic composition was obtained in the same manner as in Example 2 except that the amount of saccharide used was different from that in Example 2.

(Production method of Example 4) A two-layer separation type cosmetic composition was obtained in the same manner as in Example 2 except that the surfactant used was different from that in Example 2.

(Production Method of Example 5) A two-layer separation type cosmetic composition was obtained in the same manner as in Example 1 except that the sugar used in Example 1 was different.

(Production Method of Example 6) A two-layer separation type cosmetic composition was obtained in the same manner as in Example 1 except that the sugar used in Example 1 was different.

(Production Method of Example 7) A two-layer separation type cosmetic composition was obtained in the same manner as in Example 1 except that the saccharides used and the compounding amount thereof were different.

(Production Method of Comparative Example 1) 1. Heat and dissolve component B. 2. Heat and dissolve component C. 3. Add 1 to 2 and emulsify. 4.3 was cooled, and the component A was added thereto and mixed to obtain a two-layer separation type cosmetic.

(Production Method of Comparative Example 2) 1. Mix and dissolve ingredient A. 2. Heat and dissolve component B. 3. Heat and dissolve component C. Add 2 to 4.3 and emulsify. 5.4 was cooled and 1 was added to and mixed with it to obtain a two-layer separation type cosmetic.

(Production Method of Comparative Example 3) A two-layer separation type cosmetic composition was obtained in the same manner as in Comparative Example 2 except that the polymer used in Comparative Example 2 was different.

(Production Method of Comparative Example 4) A two-layer separation type cosmetic composition was obtained in the same manner as in Comparative Example 3 except that the activator used in Comparative Example 3 was different.

(Evaluation method of easiness of forming two layers) Examples 1 to 1
The two-layer separation type cosmetics of Example 7 and Comparative Examples 1 to 4 were vigorously shaken 10 times in a glass container to uniformly mix, and then allowed to stand at room temperature, and the change of appearance state with time was observed. The evaluation was made by (a) four-stage evaluation of the time until the two-layer separated state and (b) four-stage evaluation of the appearance of the aqueous layer in the two-layer separated state.

[0043] (A) Four-stage evaluation of the time (separation speed) until it becomes a two-layer separation state (Evaluation content) (Judgment) Stable two layers in less than 1 hour: ◎ Stable two layers in less than 12 hours: ○ Stable two layers in less than 24 hours: △ It takes more than 24 hours to form a stable bilayer or does not separate: ×

(B) Water layer (lower layer) in a two-layer separated state
Appearance of four levels (evaluation content) (judgment) Transparent: ◎ Transparent to bluish transparent: ○ White turbidity: △ Separation failure: ×

(Evaluation method of feeling of use) The two-layer separation type cosmetics of Examples 1 to 7 and Comparative Examples 1 to 4 were evaluated by the 10 specialist panels on the following items and in accordance with the following criteria. A judgment was made.

(Evaluation items) Unpleasant stickiness after application to the skin: None (+), Yes (-)

(Judgment criteria) More than 8 people gave +: ◎ 5 to 7 people gave +: ○ 3 to 4 people gave +: △ 2 people or less made +: ×

Table 2 shows the evaluation results of the ease of forming two layers and the feeling of use of Examples 1 to 7 and Comparative Examples 1 to 4.

[0049]

[Table 2]

As is clear from the results shown in Table 2, Example 1
The two-layer separation type cosmetics of to 7 completed the separation after a proper time after the shaking mixing. Further, when returning to the two-layer separated state, the upper emulsified layer and the lower aqueous layer are clearly separated, and when the two-layer separated cosmetics of these examples are shake-mixed and applied to the skin. There was no unpleasant stickiness and it was excellent in usability. Further, according to the present invention, there is no restriction on the surfactants that can be selected, so that it is possible to provide a cosmetic having a feeling of use adjusted according to needs. On the other hand, the two-layer separation type cosmetics of Comparative Examples 1 to 4 had the same feeling of use as that of the Examples or were inferior because of stickiness. Also, in either case,
After shaking mixing, a uniform mixed state is maintained more than necessary or does not separate at all, and even if separated, the transparency of the aqueous layer when returning to the two-layer separated state is inferior to that of the example. , The aesthetics were spoiled.

[0051]

EFFECTS OF THE INVENTION The two-layer separation type cosmetic composition of the present invention can be stably blended with the medicinal components, and can be applied to the skin in a uniform state of oil and water. It is a cosmetic that makes it easy to adjust the touch and has a beautiful appearance. That is, according to the present invention, a two-layer separation type cosmetic composition in which the upper layer is an emulsified layer and the lower layer is an aqueous layer, can be easily emulsified by simple shaking at the time of use, and has stability and aesthetics after use. From this point of view, it is possible to provide a two-layer separation type cosmetic composition which returns to the original two-layer separation state in a short time, and there is no limitation on the emulsifier that can be used, and which has an excellent appearance.

Claims (4)

[Claims] 1. A saccharide, or a derivative thereof, and a salt thereof, and one or more kinds selected from those which are not cationic, are contained, and are usually separated into an emulsified layer and an aqueous layer. A two-layer separation type cosmetics characterized in that 2. One or more of the following components (a), (b) and (a) saccharides or derivatives thereof, and salts thereof, which are not cationic and (b) hydrophilic. A two-layer separation type cosmetic composition, which contains a nonionic surfactant and is usually separated into an emulsified layer and an aqueous layer. 3. A saccharide, or a derivative thereof, or a salt thereof which is not cationic is alginic acid, chitosan, succinylcarboxyalkyl chitosan, cellulose, alkylcellulose, carboxyalkylcellulose or hyaluronic acid, or them. The two-layer separation type cosmetic composition according to claim 1, which is a derivative thereof or a salt thereof. 4. A separation promoter comprising one or more kinds selected from sugars, their derivatives, and their salts, and those which are not cationic.