JP2010202595A - Encapsulated cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic which is encapsulated in a capsule that is stable, even when placed in an external liquid with a low pH or stored at an elevated temperature, spreads well on the skin without leaving any gel lumps when it is discharged from a pump vessel etc., together with the external liquid, and provides good feeling at use. <P>SOLUTION: The capsule (A) that is formed from pectin and a polyvalent metal salt and comprises a cosmetic ingredient is placed in the external liquid (B). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a capsule-containing cosmetic in which a capsule having a particle size of several hundred μm to several tens of mm is present in an external liquid such as a lotion, a cosmetic liquid, or an emulsion.

  Conventionally, in this type of capsule-containing cosmetics, there are those using alginate, agar, gelatin or the like as a capsule-forming component. For example, as a capsule using an alginate, the capsule is obtained by dropping a dropping solution made of an aqueous solution of sodium alginate into a receiving solution such as a water-soluble calcium salt (Patent Documents 1 to 4).

  Among the above-mentioned capsule-containing cosmetics, those made into barium alginate-based capsules containing an alginate and a barium salt as essential components are substances that can coexist because the capsule is stable and does not break in a wide pH range of pH 4-11. In addition, the selection of treatment conditions is wide, and it is said that an optimum design can be made as a cosmetic including performance and usability (Patent Document 4).

Japanese Patent Laid-Open No. 5-92909 JP-A-5-228218 JP-A-8-175932 JP 11-29433 A

  In this type of capsule-containing cosmetic, the capsule can contain the active ingredient in a stable state, and can be easily rubbed and spread smoothly on the skin by being lightly pressed against the skin during use. As described above, a material with excellent usability is desired.

However, in the above conventional capsule-containing cosmetics, in Patent Documents 1 to 3, the stability in the pH range of the capsule is not mentioned, but if the capsule is present in the external liquid, When the pH value of the external liquid is low, the capsule becomes unstable, and the types of external liquid that can be used are limited or the feeling of use is reduced.
Moreover, when it stored at high temperature, it had the subject that a capsule became unstable.

  Furthermore, in the above conventional capsule-containing cosmetics, even those disclosed in Patent Document 4 are stable in a wide pH range, but at pH 4 as a boundary, when the pH becomes lower than this, the capsules rapidly become unstable. There was a problem that the gel was agglomerated and the usability was also lowered.

  Therefore, the present invention makes use of pectin, which is a new plant-derived raw material, and makes the encapsulated product exist in the external liquid, so that the external liquid is stable even if it is less than pH 4 or stored at a high temperature. It can be stored in a state, and it was made for the purpose of providing new capsuled cosmetics that stretch well and have a good feeling of use even when applied from a pump container etc. and spread on the skin. is there.

  The capsule-containing cosmetic of the present invention is formed by pectin and a polyvalent metal salt, and a capsule (A) containing a blending component as a cosmetic is present in the external liquid (B).

  In the present invention, the polyvalent metal salt can be any of calcium lactate, calcium chloride, and barium chloride.

  In the present invention, the blending component as a cosmetic can be at least one of a specific gravity adjusting agent, a viscosity adjusting agent, and a dispersing agent.

  In the present invention, the specific gravity adjusting agent can be at least one of glycerin, sorbitol, and mannitol.

  In the present invention, the viscosity modifier may be at least one of butylene glycol and dipropylene glycol.

  In the present invention, the pH value of the external liquid (B) is preferably set to pH 3.5 to 6.5.

  The capsule-containing cosmetic of the present invention is configured as described above, and when the capsule is present in the external liquid, even if the external liquid has a low pH value or is stored at a high temperature. When it was applied from the pump container together with the external liquid and spread on the skin, the gel did not leave a lump of gel and it was easy to use.

  Hereinafter, the capsule-containing cosmetic of the present invention will be described in detail.

  The capsule-containing cosmetic of the present invention is formed by pectin and a polyvalent metal salt, and a capsule (A) containing a blending component as a cosmetic is present in the external liquid (B).

  Needless to say, it is preferable to use a pectin having a high reactivity with a polyvalent metal salt. For example, “GENU pectin type LM” manufactured by Sanki Co., Ltd. can be cited as a pectin having a high reactivity with respect to calcium salts.

  The polyvalent metal salt is not particularly limited as long as it is a water-soluble metal salt, and examples thereof include calcium lactate, calcium chloride, and barium chloride. Among the calcium salts, calcium lactate is preferable because of its high solubility in water and excellent safety. Two or more polyvalent metal salts may be used at the same time, but are preferably used alone.

  As typical ingredients for cosmetics, specific gravity adjusting agents, viscosity adjusting agents, and dispersing agents can be mentioned. These may be used in combination of two or more of them, or may be used alone. Good. Other ingredients include moisturizers, vitamins, hormones, glycosides, antihistamines, astringents, amino acids, enzymes, isolates from natural animals and plants, oils, dirt adsorbents, pigments, fragrances, proteins , Various components including carbohydrates and fibers. The compounding component may be liquid or powder, and in the case of liquid, it may be W / O type or O / W type emulsion. Specific gravity adjusters include glycerin, sorbitol, and mannitol. Examples of the viscosity modifier include butylene glycol and dipropylene glycol. Two or more of these specific gravity adjusters and viscosity adjusters may be used simultaneously or singly.

  Moreover, in order to prevent alteration of cosmetics, an appropriate UV-cutting agent can be contained. Furthermore, various additives including a thickener, a fragrance, a colorant, and a filler (titanium oxide, barium sulfate, calcium carbonate, etc.) can be included as necessary.

  In the present invention, capsules can be generally obtained by, for example, dropping a dropping liquid composed of an aqueous solution obtained by mixing pectin and a blending ingredient as a cosmetic into a water-soluble metal salt receiving liquid. Of course, it is not limited to this method.

  The aqueous solution contains 0.1 to 5% by weight of pectin, and when the blending component is a specific gravity adjusting agent, a viscosity adjusting agent, and a dispersing agent, 1 to 15% by weight of the specific gravity adjusting agent and viscosity adjustment. An agent may be added, and a dispersant of 0.1 to 10% by weight may be added. The water-soluble metal salt receiving solution may be an aqueous solution in which 0.1 to 5% by weight of the water-soluble metal salt is dissolved.

  Thereby, in the capsule (A) in the production stage, the blending ratio of pectin is 0.1 to 5% by weight, the blending ratio of the specific gravity adjusting agent and the viscosity controlling agent is 1 to 15% by weight, and the blending ratio of the dispersing agent is It can be 0.1 to 10% by weight.

  Furthermore, the size of the capsule (A) at the production stage is preferably about 0.1 to 10 mm for use as a general cosmetic. In addition, when this is made to exist in an external liquid (B), a particle size will be about 2 to 5 times the original magnitude | size, and a weight will be about 8 to 50 times.

  In the present invention, the external liquid (B) can be an aqueous solution of a carboxyvinyl polymer, an aqueous solution of xanthan gum, or the like, and the dosage form can be a lotion, a cosmetic liquid, an emulsion, a gel, or a cream.

  Further, the pH value of the external liquid (B) can be an acidic region of pH 2 or more and less than pH 7, but in particular, the region of pH 3.5 to 6.5 keeps the capsule in a particularly stable state. This is a preferable region.

  Hereinafter, based on an Example, this invention is demonstrated in detail. Hereinafter, “parts” and “%” are expressed on a weight basis.

[Examples 1 to 14]
While mixing and stirring pectin, glycerin (specific gravity adjusting agent), butylene glycol (viscosity adjusting agent), surfactant (dispersing agent), iron oxide and / or titanium oxide (pigment) in the blending amounts shown in Table 1, Further, water was added to make the whole 100 parts.

  This aqueous solution was ejected from a nozzle toward a large amount of liquid containing a 0.1 to 5% aqueous solution of a polyvalent metal salt (calcium lactate, calcium chloride, barium chloride) shown in Table 1. Since the capsule was formed by stirring this, the capsule was scooped up and then poured into water for washing. Thereby, a capsule (A) having a particle size of 0.1 to 10 mm was obtained.

  Separately, after preparing a 1% aqueous solution of carboxyvinyl polymer, an appropriate amount of a 5% strength aqueous potassium hydroxide solution was added to 30 parts of the aqueous solution, and water was further added so that the total amount became 100 parts. As a result, an external liquid (B) adjusted to pH 3.5 to 6.5 was obtained.

  In 80 parts of this external liquid (B), 5 parts of the capsule obtained above is added, and water is further added to make the whole 100 parts. Obtained.

  When the stability and usability of the capsule-containing cosmetic obtained in this way were evaluated, the results shown in the lower part of Table 1 were obtained. The evaluation method and evaluation criteria are as follows.

(Capsule stability)
Method: Each of the cosmetics in capsules obtained in Table 1 was filled in a glass container, and a product stored in a constant temperature bath at 40 ° C. was confirmed.

Evaluation: ◎… No change ○… Slightly collapsed capsule △… Capsule collapsed ×× Capsule collapsed

(Feeling of use)
Method: Each capsule-containing cosmetic material obtained in Table 1 was filled in a pump container, put out on the skin in an appropriate amount, and the state when the cosmetic material was extended was confirmed.

Evaluation: ◎ ... Essence of the essence was easily adapted without any residue of capsules. ○ ... Essence of the essence was familiar with almost no residue of capsules. The essence is not familiar

(Comparative Examples 1-6)
Mixing amount shown in Table 2 Pectin or sodium alginate, glycerin (specific gravity adjusting agent), butylene glycol (viscosity adjusting agent), surfactant (dispersing agent), iron oxide and / or titanium oxide (dye) are mixed and stirred. However, water was further added to make 100 parts as a whole.

  This aqueous solution was ejected from a nozzle toward a large amount of liquid receiving solution composed of a 0.05 to 6% aqueous solution of a polyvalent metal salt (calcium lactate, calcium chloride, barium chloride) shown in Table 2. Since the capsule was formed by stirring this, the capsule was scooped up and then poured into water for washing. Thereby, a capsule (A) having a particle size of 0.1 to 10 mm was obtained.

  Separately, after preparing a 1% aqueous solution of carboxyvinyl polymer, an appropriate amount of a 5% strength aqueous potassium hydroxide solution was added to 30 parts of the aqueous solution, and water was further added so that the total amount became 100 parts. Thereby, the external liquid (B) adjusted to pH 2-7 was obtained.

  In 80 parts of this external liquid (B), 5 parts of the capsule obtained above is added, and water is further added to make the whole 100 parts. Obtained.

Evaluations as shown in the lower part of Table 2 were obtained for the stability and feeling of use of the capsule-containing cosmetic thus obtained. In addition, about the evaluation method and evaluation criteria, it carried out similarly to Examples 1-14.

Claims (6)

  A capsule-containing cosmetic comprising a capsule (A) formed of pectin and a polyvalent metal salt and containing a blending component as a cosmetic in the external liquid (B).   The encapsulated cosmetic according to claim 1, wherein the polyvalent metal salt is calcium lactate, calcium chloride, or barium chloride.   The encapsulated cosmetic according to claim 1, wherein the compounding component as the cosmetic is at least one of a specific gravity adjusting agent, a viscosity adjusting agent, and a dispersing agent.   The capsule cosmetic according to claim 3, wherein the specific gravity adjusting agent is at least one of glycerin, sorbitol, and mannitol.   The capsule cosmetic according to claim 3, wherein the viscosity modifier is at least one of butylene glycol and dipropylene glycol. The encapsulated cosmetic according to claim 1, wherein the external liquid (B) has a pH value of 3.5 to 6.5.