JPH06104606B2 - Cosmetic composition containing agar film capsule - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cosmetic composition containing an agar film capsule.

(Prior Art and Problems Thereof) Various types of cosmetic compositions are commercially available. It is considered that other active ingredients, for example, an enzyme and the like are added to this composition to improve the action or obtain another effect. It becomes a problem. In addition, it is difficult to introduce a substance that is altered by light into a transparent cosmetic composition.

Therefore, a stable method of blending these active ingredients into the composition is desired.

(Means for Solving the Problems) The present inventors have found that other active ingredients can be stably incorporated into a cosmetic composition by encapsulating it in a capsule, that is, an agar film capsule. That is, the present invention provides a cosmetic composition containing a cosmetic base and an agar film capsule containing an oily component as a content.

Usually, capsules with a gelatin coating are often used.
On the other hand, gelatin-coated capsules are hard to break and tough, but they have weak heat resistance and are sticky when swollen, and particles are bound to each other. As described above, the property is rather unsuitable for a use form in which it is preferable that the contents are easily broken and the contents flow out, and a use form in which it is preferable that no binding occurs in the aqueous composition. That is, it is not preferable to introduce the gelatin capsule into the cosmetic composition because the capsule is less likely to break and binding may occur. The present inventors have found that, out of various capsule-forming substances, agar is most suitable to be introduced into cosmetic compositions.

Agar is a sticky substance found in red soup, and its main component is considered to be agarose.

Capsules can be produced using the above-mentioned agar by various conventionally known methods. Agar is less sticky when swelling than gelatin, and it is difficult to make a capsule with a seam that forms two hemispheres and bonds them together. Therefore, a method for producing seamless capsules, so-called seamless capsules, is preferable.
A seamless capsule is generally a so-called dropping method in which a capsule content and a capsule coating material are extruded from a double cylindrical orifice and a spherical droplet is formed in the coagulating liquid. Specific examples of the dropping method include JP-B-51-8875 and JP-B-53-1067.

The cosmetic base may be any conventionally known base. For example, general cosmetics such as emulsions, creams, packs and solid soaps, as well as detergent compositions such as facial cleansers and shampoos are included in the cosmetic base of the present invention. These compositions are not particularly limited.

In the present invention, the contents to be enclosed in the agar film capsule may be, for example, various enzymes, drugs, dyes (pigments), and rinses when the cosmetic base is shampoo and the like. For example, when the cosmetic base is a massage cream, the capsule is destroyed due to lack of lubricity due to evaporation of water or solvent due to continued massage, and the coloring agent in the content serves as an indicator of the end point of massage. You may do it. Further, in the case where the content of the capsule is altered by the action of light, the content of the capsule may be hidden from the light by coloring the capsule film with various colors or by adding a light shielding agent. If the contents are easily decomposed by water, the capsule coating prevents this decomposition. It is also interesting to apply various colors to the capsules and suspend the various color capsules in a transparent solution such as an emulsion. An embodiment of the agar capsule of the present invention is shown in FIGS. 1 and 2.

Usually, the above-mentioned various contents 2 are enclosed in the film 1. As described above, the film 1 may contain a coloring or masking agent. In FIG. 2, the content 2 is contained in the film 1, and the agar particles 3 are contained in the content 2. It is also interesting to color these agar particles 3 in different colors.

The particle size of the capsules used for the above purposes may vary. For example, if you want to enjoy the color by coloring the capsules, a diameter of about 1 to 5 mm is preferable, but if you want to change the color to act as an indicator, it is 0.
It is preferably about 1 to 2 mm.

(Operation and Effect of the Invention) According to the present invention, the agar film capsule is used particularly in a cosmetic composition. The agar capsule is easily crushed by pressing force,
Contents leak out. In addition, the crushing is uniform and there is no feeling of foreign matter. This capsule does not exhibit tackiness when swollen and is heat resistant. Therefore, it can be incorporated into various cosmetic bases such as creams, shampoos, facial cleansers and the like.

(Examples) The present invention will be described in more detail with reference to Examples.

Example 1 Coating weight% agar 2 purified water 98 Using the above coating formulation, an agar coating capsule having a vegetable oil particle size of 1 to 2 mmφ and a coating rate of 83.5% was prepared by the double nozzle method.

At that time, the film tank temperature was 80 ° C, the film line temperature was 80 ° C, and the temperature of the cooling liquid was 15 ° C.

The hardness of the obtained capsules is 3 to 8 g / cm ² , and in the purified water
It did not melt even when heated at 60 ° C for 5 hours.

This capsule was dispersed in the following prescription massage cream. Prescription wt% Liquid paraffin 50.0 Beeswax 15.0 spermaceti 2.0 Lanolin 0.5 G-1441 4.0 (polyoxyethylene sorbitol lanolin derivative) Arasseru 60 (sorbitan monostearate) 4.0 Arasseru 83 (sorbitan Sesukiorieto) 0.5 Veegum gel 0.5 Water 23.5 Preservative Suitable amount Fragrance Suitable amount This cream was kneaded with an agar capsule and massaged, and the capsule broke at the end point.

Example 2 An agar film capsule containing a mineral oil as an inner core was obtained in the same manner as in Example 1 except that the following formulation was used. Film formulation weight% agar 3 titanium oxide 5 purified water 98 The obtained capsules were kneaded into an o / w emulsion.

The composition of the emulsion was as follows. Agar film capsules prescription wt% mineral oil 1.00 Glycerin 3.00 Stearic Acid 4.00 PEG 600 monostearate 3.67 glyceryl monoester 1.67 Water 86.66 The emulsion in was stable even after 180 days at 50 ° C..

[Brief description of drawings]

FIG. 1 shows one embodiment of the agar film capsule used in the present invention, and FIG. 2 shows another embodiment. In the figure, 1 ... Agar film, 2 ... Contents, 3 ... Agar are shown. Response

Claims (4)

[Claims] 1. A cosmetic composition containing a cosmetic base and an agar film capsule containing an oily component. 2. The first cosmetic base is an emulsion or a pack.
The cosmetic composition according to the item. 3. The cosmetic composition according to claim 1, wherein the oily component contains an enzyme and a color former. 4. The cosmetic composition according to claim 1, wherein a colorant or a light-shielding agent is added to the agar film to protect the capsule contents from photodegradation.