JP2801639B2 - Skin cosmetic composition for makeup - Google Patents

Description

The present invention relates to a skin cosmetic composition for make-up,
An object of the present invention is to provide a skin cosmetic composition for make-up which has an excellent moisturizing effect, is stable physicochemically, and does not easily lose makeup.

(Prior Art) In general, a skin cosmetic composition for make-up is used for coloring skin, etc., hiding defects, giving luster or, conversely, turning off luster to give shadows and giving a pearl effect. It is a cosmetic used to create attractive appearance.

In order to achieve such effects, first, as a base material, powder materials such as talc and zinc oxide, oils and fats, hydrocarbons, or interfacial materials are used for the purpose of good functions and functions such as spreading and sticking and easy molding of products. Various raw materials such as activators are used.

In addition, a coloring agent such as an organic pigment or an inorganic pigment is used as a characteristic raw material of the skin cosmetic composition for makeup.

However, in recent years, importance has been placed on usefulness such as maintenance of skin health or improvement of damage even in skin cosmetic compositions for make-up, and it has been proposed to mix various active ingredients.

In particular, skin moisture is believed to play a very important role in maintaining or improving its health.

Therefore, it is desired to add a moisturizing agent to the skin cosmetic composition for makeup, but the skin cosmetic composition for makeup is generally a water-soluble substance because the base is an oily base. It is difficult to formulate a moisturizer in terms of composition, and even if it is blended, the makeup may be destroyed due to sweat or the like, resulting in impairing the properties of the skin cosmetic composition for makeup. The composition is hardly imparted with a moisturizing function.

Further, in JP-A-55-130906, as cosmetics for preventing makeup collapse due to sweat or the like, polyionic complexes synthesized by reaction of synthetic and natural anionic polymer salts with polycations or cationic surfactants are disclosed. Although a cosmetic compounded in a cosmetic base has been disclosed, it has not been satisfactory to users because of insufficient adhesion to the skin.

(Problems to be Solved by the Invention) That is, the conventional skin cosmetic composition for makeup mainly comprises a powder base such as a powder base and a pigment and an oil base as raw materials. In many cases, it has no moisturizing effect and lacks moist feeling, and has the problem of easily causing makeup collapse. It is strongly desired to improve these problems in skin cosmetic compositions for makeup. It had been.

(Means for Solving the Problems) The present invention provides a physicochemically stable, hardly disintegrating makeup, and safe makeup for producing a makeup skin cosmetic composition having an excellent moisturizing effect. An object of the present invention is to provide a skin cosmetic composition.

That is, the present invention provides a skin cosmetic composition for makeup characterized by containing a polyelectrolyte complex, which is synthesized by reacting chitosan and a salt of an acidic polymer compound. We succeeded in eliminating all the problems in the past.

(Examples of the Invention) The present inventors have searched for a substance having a high moisturizing effect that can be blended into a skin cosmetic composition for make-up, and as a result of extensive research, have found that by reacting chitosan with salts of an acidic polymer compound. Discovered that by blending the synthesized polyelectrolyte complex into the skin cosmetic composition for makeup, it is possible to obtain a skin cosmetic composition for makeup with excellent moistness and excellent adhesion to the skin. Thus, the present invention has been completed.

The acidic polymer compound used in the present invention is not particularly limited as long as it reacts a salt thereof with chitosan to effectively form a polymer electrolyte complex that can achieve the object of the present invention.

Specific examples thereof preferably include hyaluronic acid, alginic acid, polyacrylic acid and a mixture thereof.

The polyelectrolyte complex used in the present invention is obtained by gradually stirring an aqueous solution of a salt of an acidic polymer compound such as sodium hyaluronate, sodium alginate or sodium polyacrylate into an aqueous solution of chitosan in hydrochloric acid while stirring. , And the resulting precipitate is washed with water, dried, and pulverized. That is, in the present specification, the polymer electrolyte complex refers to a powdery polymer compound synthesized by reacting chitosan with a salt of an acidic polymer compound.

The polymer electrolyte composite thus obtained can be used as a compounding raw material for a skin cosmetic composition for make-up by blending it into a usual oily foundation, lipstick, nail powder or the like.

The skin cosmetic composition for makeup produced by blending these polymer electrolyte composites has an extremely excellent moist feeling, is excellent in adhesion to the skin, and does not cause makeup collapse when sweating. .

In actual use, not only the polymer electrolyte composite is blended and used, but also the surface of the powder used in the skin cosmetic composition for makeup is coated with these polymer electrolyte composites and used. Since the polyelectrolyte complex is uniformly dispersed in the skin cosmetic composition for makeup, more excellent adhesion and moist feeling can be obtained.

Since these polyelectrolyte complexes are insoluble or hardly soluble in water, their formulation into creams, emulsions, and other basic cosmetics is limited, but they are blended within the range permitted as a skin cosmetic composition for makeup. By doing so, it is possible to produce a skin cosmetic composition for make-up having a long lasting and excellent moisturizing property.

By adding other drugs such as anti-inflammatory agents during the production of these polyelectrolyte complexes, the polyelectrolyte complexes can retain these drugs at an extremely high rate, and at the pH at the time of preparing the composites, Is hardly released into water and releases a drug in response to a change in pH.

Therefore, it is possible to prepare a skin cosmetic composition for makeup that releases other drugs.

(Examples and Test Examples) Next, the effects of the present invention will be described in detail based on examples.

[Example 1] (Preparation of polyelectrolyte complex formed between chitosan and sodium hyaluronate) An aqueous sodium hyaluronate solution (2%) was gradually dropped into a chitosan acidic aqueous solution (0.3%) with stirring. did. The resulting precipitate was filtered, washed with water and dried.

The polymer electrolyte composite thus obtained was charged into an atomizer and pulverized with a 0.1 to 1 mm screen.

By reacting chitosan and sodium alginate and chitosan and sodium polyacrylate in the same manner as in Example 1, a polymer electrolyte composite was obtained.

Example 2 (Preparation of Titanium Oxide Coated with Polyelectrolyte Complex Formed between Chitosan and Sodium Hyaluronate) 100 g of titanium oxide having a particle size of 3 to 5 μm and 40 g of an aqueous sodium hyaluronate (2%) solution were prepared. The mixture was put into a grinder and mixed well for 1 hour. While further mixing, an aqueous chitosan aqueous solution (1%) was gradually added dropwise, and the mixture was further stirred for 1 hour.

The reaction product was filtered, washed with water, and dried in the presence of phosphorus pentoxide at room temperature under reduced pressure of 20 mmHg. This was put into an atomizer and crushed with a 1 mm screen.

By using mica, sericite, zinc oxide, nylon powder, talc, kaolin and the like instead of titanium oxide in the same manner as in Example 2, polymer electrolyte composite coatings of the respective powders were obtained. .

In a similar manner, chitosan and sodium alginate were reacted to obtain a polymer electrolyte composite coating.

[Test Example 1] (Hygroscopic test of the polymer electrolyte composite coating obtained by the method of Example 2) 100% RHG at 28 ° C for 2 g of each of the following samples
And the moisture absorption after 2 hours was measured by a weight method.

Titanium oxide, kaolin, talc, sericite, nylon powder A: Chitosan-hyaluronic acid polymer electrolyte composite coating obtained by the method of Example 2.

B: Chitosan-alginate polymer electrolyte composite coating obtained by the method of Example 2.

C: untreated powder 100% RHG moisture absorption at 28 ° C (%) [Example 3] Isopropyl myristate, carnauba wax and beeswax were heated and melted, and other components were added to the homogeneous melt, mixed and cooled.

This mixture was kneaded several times with a roll meal. Kneaded material
The mixture was redissolved at 80 ° C., defoamed under reduced pressure, mixed with a fragrance, poured into a container and allowed to cool.

[Example 4] The mixture was mixed well and then compression-molded to obtain a solid powder. Here, * in the formula (A) is a coating of the chitosan-hyaluronic acid polymer electrolyte composite produced by the method of Example 2.

[Example 5] [Example 6] Test Example 2 (Evaluation Test of Solid Foundation Obtained in Example 4) Evaluation tests were performed on the formulations (A) and (B) of the solid foundation obtained in Example 4 as follows.

(1) Subjects The subjects were 40 girls (21 to 39 years old) who were skilled in makeup.

(2) Test method The above-mentioned subjects were given the solid foundation of the prescription (A) on the left face, the solid foundation of the prescription (B) on the right face,
After washing the face and applying the base cream, it was used, and the quality of the skin was evaluated by the individual's report on the moist feeling, adhesion, spread to the skin, and presence or absence of makeup collapse.

(3) Test results (Effects of the Invention) As described in detail above, the invention described in claim 1 is characterized by containing a polymer electrolyte complex synthesized by reacting chitosan with a salt of an acidic polymer compound. Since the present invention relates to a make-up skin cosmetic composition, it has the following effects. That is, since this polyelectrolyte complex has excellent hygroscopicity, by being added to a makeup skin cosmetic composition,
It is possible to obtain a skin cosmetic composition for make-up, which is excellent in moist feeling, adhesiveness, and spreadability on the skin, and has little makeup collapse.

The invention according to claim 2 is characterized in that the acidic polymer compound is hyaluronic acid, alginic acid, polyacrylic acid, or a mixture thereof, wherein the skin cosmetic for makeup is used. Since the present invention relates to an ingredient composition, it has an effect of having more excellent moisturizing power.

The invention according to claim 3 is the makeup skin according to claim 1, wherein the polymer electrolyte complex is obtained by coating another powder cosmetic component with the polymer electrolyte complex. Since the present invention relates to a cosmetic composition, the polyelectrolyte complex is uniformly dispersed in the skin cosmetic composition for make-up, and thus has an effect that moist feeling and adhesion to the skin can be further improved. .

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A61K 7/00 A61K 7/02

Claims (3)

(57) [Claims] 1. A skin cosmetic composition for makeup, comprising a polyelectrolyte complex synthesized by reacting chitosan with a salt of an acidic polymer compound. 2. The method according to claim 2, wherein the acidic polymer compound is hyaluronic acid,
The skin cosmetic composition for makeup according to claim 1, wherein the composition is alginic acid, polyacrylic acid, or a mixture thereof. 3. The skin cosmetic composition for makeup according to claim 1, wherein the polymer electrolyte composite is obtained by coating another polymer cosmetic component with the polymer electrolyte composite.