JP2002020233A - Granulated composition and skin care preparation containing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composition, and to provide a skin care preparation of aqueous gel useful as a cleansing cosmetic, improved in cleansing activity, while maintaining or improving feelings to the skin, by using the composition. SOLUTION: This composition is obtained by granulating water-swelling polymer powders. The skin care preparation is obtained by adding the composition to an aqueous gel preparation for cleansing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a water-swellable polymer granulation composition and an external preparation for skin containing the same.

[0002]

2. Description of the Related Art Cleansing cosmetics, such as make-up removers, using an aqueous gel have been widely used in recent years because of their mild feeling of use. Behind this is the spread of make-up cosmetics with good makeup durability.
The act of removing makeup may be significantly increased compared to before, and even a slight stimulus of makeup removal may cause a serious stimulus due to the accumulation thereof. Conventionally, makeup removal is performed by adding a diluted aqueous solution of a surfactant to cotton, etc., and using a slight solvent effect and physical transfer effect to remove makeup. The makeup cosmetic was dropped by the solvent effect of the oil of the oil-based cleansing cosmetic. Aqueous gel make-up removal systems currently used usually use aqueous gels of salts of carboxyvinyl polymers containing nonionic surfactants,
In such a system, the effect of removing the makeup cosmetic is superior to that of the solution type in the case of a lotion type, but it is inferior to oily cleansing cosmetics, and the feeling of use is richer than that of the type. Yes, it was not as greasy as oily cleansing, it was an intermediate feel between them. Against such a background, in the case of a cleansing cosmetic of an aqueous gel preparation, development of a technique for improving the cleansing power while maintaining or improving the feeling of use has been desired.

On the other hand, water-swellable polymers such as starch / acrylate graft polymers are already known as raw materials for cosmetics and cosmetics, but it is completely unknown to granulate such water-swellable polymers. Had not been. This is because such powders have a remarkable water swelling property, so that when a solvent for granulation is added, they become gel beads and do not become granules or fine granules. This was because it was difficult. Therefore, it has not been known at all that such a granulated product of the water-swellable powder is contained in cosmetics, and that the cosmetics contained therein are excellent in both usability and cleansing effect.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made under such circumstances, and in a cleansing cosmetic preparation of an aqueous gel preparation, while maintaining or improving the feeling of use,
It is an object to provide a technique for improving cleansing power.

[0005]

In view of such circumstances, the present inventors have intensively studied a technique for improving or improving the cleansing power of a cleansing cosmetic preparation of an aqueous gel preparation while maintaining or improving the feeling of use. As a result of repeated efforts, they have granulated a water-swellable polymer, found such a characteristic in an aqueous gel cleansing cosmetic, and completed the invention. That is, the present invention relates to the following technology. (1) A composition obtained by granulating a water-swellable polymer powder. (2) The composition according to (1), wherein the water-swellable polymer is a starch / acrylate graft polymer. (3) The method according to (1) or (2), wherein the granulation is performed using one or more kinds selected from a binder, a nonaqueous solvent, and a powder for shaping. Composition. (4) The composition according to any one of (1) to (3), wherein the composition contains silica as a powder for shaping. (5) An external preparation for skin, comprising the composition according to any one of (1) to (4). (6) The external preparation for skin according to (5), wherein the composition according to any one of (1) to (4) is dispersed in an aqueous gel composition. (7) a cleansing cosmetic,
An external preparation for skin according to (6) or (5). (8) A cosmetic containing a water-swellable polymer, wherein the distribution of the water-swellable polymer in the cosmetic is not uniform. (9) The means for making the water-swellable polymer non-uniform is (1) to
(4) The cosmetic according to (8), wherein the composition according to any one of the above, is dispersed in the cosmetic. Hereinafter, the present invention will be described in detail focusing on embodiments.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION (1) Granulated composition of the present invention The granulated composition of the present invention is characterized by granulating a water-swellable polymer. Here, the water-swellable polymer referred to in the present invention means a polymer that swells with moisture, and the swelling is such that the volume after water swelling is 5 times the volume in a non-aqueous state. It means a polymer as described above, and specific examples include a graft polymer of a polysaccharide and acrylic acid or methacrylic acid, or a salt thereof.
Such a graft polymer can be synthesized according to a conventional method such as, for example, converting a carboxylic acid of polyacrylic acid into an acid chloride with a halogen agent such as thionyl chloride, and condensing this with a polysaccharide in the presence of a base. Yes, such a commercial product can be used. As a commercially available water-swellable polymer, it is commercially available from Sanyo Chemical Industries, Ltd. under the trade name of “Sunfresh ST-100SP”.
Particularly preferred is a starch / sodium acrylate graft polymer. In such granulation, in addition to the water-swellable polymer, an optional component used in ordinary granules can be contained. Such optional ingredients include, for example, excipients such as starch, talc, silica,
Examples thereof include binders such as hydroxypropylcellulose and methylcellulose, and coloring agents such as yellow No. 404 and blue No. 401, iron oxide, and titanium dioxide. In the granulated product of the present invention, since the water-swellable polymer swells remarkably due to moisture, it is preferable to perform granulation using a binder soluble in a non-aqueous solvent. Propyl cellulose is particularly preferred. A preferred example of the non-aqueous solvent in which this is dissolved is ethanol. Further, when the granulated composition of the present invention is contained in a cleansing cosmetic or the like as described below, if a coloring agent is contained in the granulated composition, the granulated composition in the cosmetic is prepared. Swells and produces a colored transparent polka dot pattern, which has the secondary effect of making the appearance extremely beautiful. Therefore, it is preferable to include such a coloring agent. Furthermore, in such a case, if a powder that adsorbs dirt such as silica is contained as an excipient,
Such a powder is preferable because it can contain the adsorptivity of the powder without being damaged by solvent wetting. The preferred content of the water-swellable polymer in the granulated composition of the present invention is from 30 to 99.
%, More preferably 40 to 99% by weight. Also, what is the preferred content of the binder? 0.1-1% by weight
The preferred content of the excipient is 60% by weight or less. The granulated composition of the present invention can be produced by treating the above components according to a conventional method. That is, the above-mentioned components are mixed, a non-aqueous solvent or the like is added, and a fluidized bed or a tumbling bed is granulated, and this is blown and dried. Goods and none,
After that, extrusion granulation, rounding with a marmellaizer, etc., and granulation can also be carried out by charging components other than the binder into a fluidized bed granulator, and spraying a nonaqueous solvent solution of the binder to perform fluidized bed granulation. , And can be manufactured by air drying.

(2) Cosmetic of the Present Invention The cosmetic of the present invention is characterized by containing the above-mentioned granulated composition. As described above, the cosmetic of the present invention has a feeling of use and a cleansing effect that is suitable for cleansing cosmetics. Therefore, it is particularly preferable to apply the cosmetic to cleansing cosmetics. Since it has suitable properties, application to cosmetics other than cleansing cosmetics also belongs to the technical scope of the present invention. Such comfort during use is due to the non-uniformity of the composition of the cosmetic comprising the granulated composition of the present invention and the cosmetic composition in which the granulated composition is dispersed. That is, the properties of the swollen portion and the surrounding portion are different from each other, and such a difference fluctuates when applying the granulated composition to the swollen portion and the surrounding portion, thereby creating comfort. In order to exhibit such properties, it is necessary that the cosmetic composition, which is the dispersion medium of the granulated composition, is a water-containing composition, which can be said to be a component of the cosmetic of the present invention. In the cosmetic of the present invention,
The preferred content of these granulated compositions is 0.05 to 5% by weight, more preferably 0 to 5% by weight, based on the total amount of the cosmetic, that is, the weight of the cosmetic after the granulated composition is contained. .
1 to 1% by weight. This is because if the amount is too large, the preferable non-uniformity of the preparation may be impaired, and if the amount is too small, a favorable effect such as a cleansing effect may not be obtained.

When the cosmetic of the present invention is applied to a cleansing cosmetic, it is preferable to apply it as an aqueous gel preparation. Examples of such a gel preparation include an aqueous gel preparation formed by a salt of a carboxyvinyl polymer, and an acrylic gel. Aqueous gel preparations made from copolymers containing acid or methacrylic acid and their long-chain alkyl esters as constituent monomers can be preferably exemplified. Of course, a small amount of an oily component can be added to these systems to use as an emulsion formulation within a range that does not impair the good feeling of use and the cleansing effect, which are features of the cosmetic of the present invention. It is particularly preferable to apply the composition to a transparent gel from the viewpoint of beauty. Salts of these copolymers include alkali metal salts such as sodium and potassium, alkaline earth metal salts such as calcium and magnesium, ammonium salts, organic amine salts such as triethanolamine and triethylamine, and bases such as arginine and lysine. Preferred are amino acid salts. In such a case, an ether bond such as dipropylene glycol is used as a component for improving cleansing power.
Polyhydric alcohols containing up to three, diglycerin tetraolate, polyoxyethylene coconut oil fatty acid glyceryl, polyoxyethylene (caprylic / capric acid) glyceryl, polyoxyethylene glyceryl isostearate, polyoxyethylene glyceryl triisostearate, etc. It is preferable to contain oils and fats having a solvent effect of the above. The preferred content of each is 1 to 30% by weight.
And more preferably 5 to 25% by weight. This is because an excellent cleansing effect can be imparted when the amount is in such a range.

When the cosmetics of the present invention are applied to ordinary basic cosmetics by making use of the comfort of use, the cosmetics of the present invention contain active ingredients and optional ingredients used in such cosmetics. You can do it. Even in such a system, it is possible to form an emulsion together with a small amount of an oily component as in the case of the above-mentioned cleansing cosmetics, as long as the characteristics such as feeling of use are not impaired.

[0010] The cosmetic of the present invention can be applied to a cleansing cosmetic or an ordinary basic cosmetic by adding any of the components used in the present invention in addition to the above components. It can be contained as long as the effect is not impaired. Such optional components include, for example, hydrocarbons such as squalane, petrolatum, microcrystalline wax, jojoba oil, carnauba wax,
Esters such as octyldodecyl oleate, triglycerides such as olive oil, tallow, coconut oil, fatty acids such as stearic acid, oleic acid and ritinoleic acid, higher alcohols such as oleyl alcohol, stearyl alcohol and octyldodecanol, sulfosuccinate esters and the like. Anionic surfactants such as polyoxyethylene alkyl sodium sulfate, amphoteric surfactants such as alkyl betaine salts, cationic surfactants such as dialkylammonium salts, sorbitan fatty acid esters, fatty acid monoglycerides, and polyoxyethylene adducts thereof , Nonionic surfactants such as polyoxyethylene alkyl ethers and polyoxyethylene fatty acid esters, polyhydric alcohols such as polyethylene glycol, glycerin and 1,3-butanediol, thickening Gelling agents, antioxidants, ultraviolet absorbers, coloring materials, preservatives, powders and the like can be preferably exemplified. The cosmetic of the present invention can be produced by treating these essential components, preferred components and optional components according to a conventional method. Among such production methods, particularly preferred is that the granulated composition is prepared in advance, and a cosmetic composition is prepared with the other components, and the granulated composition is contained in the cosmetic composition. Is a method of dispersing. According to such a method, it is possible to disperse the granulated product in the cosmetic without causing damage to the shape of the granulated product.

[0011]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but it goes without saying that the present invention is not limited to only such Examples.

<Example 1> The following formulation component A was charged into a fluidized bed granulator and blown to form a fluidized bed, and the component B was gradually sprayed onto the fluidized bed.
Was sent and dried to obtain a granulated composition 1. A starch / sodium acrylate graft polymer 98.5 parts by weight B Blue No. 401 0.5 parts by weight Hydroxypropyl cellulose 1 part by weight Ethanol 100 parts by weight

<Example 2> The following ingredients (a) were charged into a fluidized bed granulator and blown to form a fluidized bed, and the component (b) was gradually sprayed onto the fluidized bed.
, And dried to obtain a granulated composition 2. A starch / sodium acrylate graft polymer 50 parts by weight Silica 48.5 parts by weight B Yellow 404 0.5 part by weight Hydroxypropyl cellulose 1 part by weight Ethanol 100 parts by weight

Example 3 A cleansing cosmetic (aqueous gel type) was prepared according to the following formulation.
That is, b is gradually added to the component a, and then c is gradually added and emulsified, and the component d is further added and dispersed therein.
The mixture was stirred and cooled to obtain a cosmetic 1 for cleansing. At the same time, Comparative Example 1 in which the two components were replaced with a composition that did not granulate with the same components and Control Example 1 in which the two components were replaced with water were similarly prepared. These were compared for cleansing action. That is, using 4 panelists, 2cm x 2cm on the inner side of the upper arm
Was prepared, a foundation was applied, and the color difference from the color of the surrounding skin was measured. Thereafter, this was dropped using Cosmetic 1, Comparative Example 1, and Control Example 1, and the color difference was measured again. The results are shown in Table 1 as the average color difference. Than this,
It can be seen that the cleansing cosmetic 1 of the present invention has excellent cleansing action. It can be seen that this is due to the non-uniformity created by the granulated composition 1. A POE (8) (caprylic / capric acid) glyceryl 10 parts by weight b Carboxyvinyl polymer 0.6 part by weight Dipropylene glycol 20 parts by weight Water 50 parts by weight 0.1 parts by weight methyl paraben 0.1 parts by weight c 10 2.6% by weight aqueous solution of potassium hydroxide 26 parts by weight of water 2 parts by weight of granulated composition 1

[0015]

[Table 1]

<Example 4> The face of the panelist was massaged in the cosmetics 1, Comparative Example 1 and Control Example 1, and the concentration of plasterone in saliva before and after the massage was measured by a sandwich antibody method. Table 2 shows the rise rate of plasterone by massage. Than this. The cosmetic of the present invention, Cosmetic 1, had a higher plasterone increase rate than Comparative Example 1 and Comparative Example 1, which was due to the addition of a water-swellable polymer as a granulated composition, It can be seen that this is caused by the creation of a non-uniform state.

[0017]

[Table 2]

Example 5 A cleansing cosmetic (aqueous gel type) was prepared according to the following formulation.
That is, b is gradually added to the component a, and then c is gradually added and emulsified, and the component d is further added and dispersed therein.
The mixture was stirred and cooled to obtain a cosmetic 2 for cleansing. At the same time, Comparative Example 1 in which the two components were replaced with a composition that did not granulate with the same components and Control Example 1 in which the two components were replaced with water were similarly prepared. These were compared for cleansing action. That is, using 4 panelists, 2cm x 2cm on the inner side of the upper arm
Was prepared, a foundation was applied, and the color difference from the color of the surrounding skin was measured. Thereafter, this was dropped using Cosmetic 2, Comparative Example 2 and Control Example 1, and the color difference was measured again. The results are shown in Table 3 as the average color difference. Than this,
It can be seen that the cleansing cosmetic 2 of the present invention is excellent in cleansing action. It can be seen that this is due to the non-uniformity created by the granulated composition 2. or,
Since it has an excellent cleansing effect as compared with the cosmetic 1, the silica of the stain-removing powder contained in the granulated composition does not lose its adsorption effect due to the wetting of the cosmetic composition. It can be seen that this is the cause of the development of such excellent cleansing power. A POE (8) (capric acid / caprylic acid) glycerin 10 parts by weight b Carboxyvinyl polymer 0.6 parts by weight Dipropylene glycol 20 parts by weight Water 50 parts by weight 0.1 parts by weight methyl paraben 0.1 parts by weight butyl paraben C 10 2.6% by weight of aqueous potassium hydroxide solution 26 parts by weight of water 2.6 parts by weight of granulation composition 2

[0019]

[Table 3]

<Example 6> In the same manner as in Example 5, a cosmetic for cleansing (aqueous gel type), which is a cosmetic of the present invention, was prepared. That is, the components (a) and (b) are each heated and stirred at 70 ° C., and (b) is gradually added to (a) with stirring, and further (c) is added, mixed well, stirred and cooled, and the aqueous gel cleansing cosmetic 3 is added. I got This is also a cleansing material having an excellent feeling of use, and according to the above-mentioned cleansing test, it had an effect of cleansing a makeup having a color difference of 3.3 before cleansing to a color difference of 0.5 after cleansing. A POE (20) glyceryl isostearate 8 parts by weight POE (20) glyceryl triisostearate 12 parts by weight b POE (10) methyl glucoside 10 parts by weight dipropylene glycol 30 parts by weight water 38.8 parts by weight methyl paraben 0.1 parts by weight Butylparaben 0.1 part by weight C Granulation composition 1 1 part by weight

<Example 7> In the same manner as in Example 6, a cosmetic for cleansing (aqueous gel type), which is a cosmetic of the present invention, was prepared. That is, the components (a) and (b) are each heated and stirred at 70 ° C., and (b) is gradually added to (a) with stirring, and further (c) is added, mixed well, stirred and cooled, and the aqueous gel cleansing cosmetic 4 is added. I got This is also a cleansing material with excellent usability, and according to the above-mentioned cleansing test, had a function of cleansing a make-up having a color difference of 3.7 before cleansing to a color difference of 0.3 after cleansing. A POE (20) glyceryl isostearate 8 parts by weight POE (20) glyceryl triisostearate 12 parts by weight b POE (10) methyl glucoside 10 parts by weight dipropylene glycol 30 parts by weight water 38.8 parts by weight methyl paraben 0.1 parts by weight Butylparaben 0.1 part by weight C Granulation composition 2 1 part by weight

Example 8 A cosmetic for massage was prepared according to the following prescription. That is, b, b, and c were each heated to 70 ° C, b was added to b, neutralized, b was added, the mixture was homogenized with a homogenizer, and d was added and dispersed uniformly, followed by stirring and cooling. Thus, an emulsion gel-like cosmetic for massage was obtained. Since this product has an excellent feeling upon use, massage using this product increased the amount of plasterone in saliva by 13.7%. (Number of examples 1) a 1,2-pentanediol 5 parts by weight isoprene glycol 5 parts by weight glycerin 2 parts by weight acrylic acid / alkyl (C10-30) acrylate copolymer 0.3 parts by weight phenoxyethanol 0.1 parts by weight water 40 parts by weight b Potassium hydroxide 0.2 parts by weight Water 37.2 parts by weight Hadiglycerin tetraolate 10 parts by weight d Granulation composition 1 0.2 parts by weight

[0023]

According to the present invention, it is possible to provide a technique for improving the cleansing power of a cleansing cosmetic preparation of an aqueous gel preparation while maintaining or improving the feeling of use.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A61K 7/50 A61K 7/50 9/10 9/10 9/14 9/14 47/04 47/04 47 / 36 47/36 A61P 17/16 A61P 17/16 C08F 251/00 C08F 251/00 C08J 3/12 C08J 3/12 Z F term (reference) 4C076 AA16 AA31 BB31 DD27 DD30 DD37 DD38 DD44 DD46 EE09 EE32 EE38 EE50 FF04 FF05 FF16 FF22 FF39 GG13 GG17 4C083 AB032 AB171 AC112 AC122 AC172 AC392 AC422 AC482 AD092 AD202 AD241 AD242 BB21 BB60 CC05 CC22 DD27 DD31 DD41 EE06 EE07 4F070 AA02 AA03 AA29 AC23 AC36 AE22 DA05 DA03 DC05 DC03 GA03

Claims (9)

[Claims] 1. A method comprising granulating a water-swellable polymer powder,
Composition. 2. The method according to claim 1, wherein the water-swellable polymer is a starch / acrylate graft polymer.
A composition according to claim 1. 3. The method according to claim 1, wherein the granulation is carried out using one or more kinds selected from a binder, a non-aqueous solvent, and a powder for shaping. Composition. 4. The composition according to claim 1, further comprising silica as a shaping powder. 5. An external preparation for skin, comprising the composition according to any one of claims 1 to 4. 6. The external preparation for skin according to claim 5, wherein the composition according to any one of claims 1 to 4 is dispersed in an aqueous gel composition. 7. The external preparation for skin according to claim 6, which is a cleansing cosmetic. 8. A cosmetic containing a water-swellable polymer, wherein the distribution of the water-swellable polymer in the cosmetic is non-uniform. 9. The cosmetic according to claim 8, wherein the means for making the water-swellable polymer nonuniform is to disperse the composition according to any one of claims 1 to 4 in the cosmetic.