JPH03153612A - Cosmetic - Google Patents

Abstract

PURPOSE:To obtain a cosmetic having low skin irritation and high safety and giving excellent feeling to the skin by compounding a cosmetic raw material produced by coating cosmetic raw material powder with a liquid mixture of hydrolyzed conchiolin and a humectant polymeric substance. CONSTITUTION:Hydrolyzed conchiolin is dissolved in a humectant polymeric substance (e.g. hyaluronic acid or collagen) compatible with the hydrolyzed conchiolin. If necessary, purified water is added and stirred in the above dissolution process. Powder such as titanium oxide or talc is added to the solution to obtain powder coated with hydrolyzed conchiolin and humectant polymeric substance and the coated powder is used as a raw material for the objective cosmetic. Tough and uniform coating can be applied to the powder to be compounded to cosmetic to enable the application of hydrolyzed conchiolin to an oil-based color cosmetic. Hydrophobic powder can be converted to hydrophilic by the coating to improve the dispersibility of the powder in an emulsion or water-based cosmetic.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cosmetic containing a cosmetic raw material obtained by coating powder used in Cosmetic Ichihara T4 with conchiolin hydrolyzate and a moisturizing polymeric substance. .

[Conventional technology]

Conventionally, cosmetics using shellfish have been made by simply powdering scrap pearls and Akoya shells, etc., and have been used for only a few purposes, such as facial scrubs, and on a very small scale at home or as a family tradition. It was just that.

Regarding the use of conchiolin, which is a hard protein contained in this shellfish, and its hydrolyzate as a raw material for cosmetics, some of the applicants have published JP-A-62-221612, JP-A-62-223104, and JP-A-62-223104. Kaisho 62-2
This is proposed by Japanese Patent No. 98507.

On the other hand, regarding makeup cosmetics containing collagen-coated powder, which is a powder used as a cosmetic raw material coated with collagen, JP-B No. 1. -13686, and the surface of the pigment is made of 1 selected from moisturizing polymeric substances.
JP-A-62-16971.2 discloses a make-up cosmetic containing one or more coated pigments obtained by coating with a coated pigment or two or more kinds of pigments, and is a cosmetic with improved feel of use. Special J'r materials have been published or announced, but these only improve the dryness and the softness on the skin.

[Problem to be solved by the invention]

It is well known that conchiolin hydrolyzate is highly effective as a raw material for cosmetics, based on the above-mentioned patent and the fact that it has been used since ancient times.

However, since conchiolin hydrolyzate is water-soluble,
It was difficult to incorporate it into oil-based color cosmetics. Of course, it is possible to directly incorporate solid conchiolin hydrolyzate into oil-based color cosmetics;
The drawback was that the fl power was weak.

On the other hand, when hydrophobic powder is used in emulsions or other water-based cosmetics, the dispersibility of the hydrophobic powder is poor and there are problems such as agglomeration.

The purpose of L1 of the present invention is to force the water-soluble conchiolin hydrolyzate onto the surface of powder particles of pigments and other fillers in oil-based color cosmetics, making it possible to incorporate it into oil-based cosmetics, and making it hydrophobic. Improved dispersibility when blending the powder into cosmetics, eliminating irritation to the skin and increasing safety, as well as improving spreadability, blending into the skin, and adhesion. The objective is to obtain cosmetic ingredients containing cosmetic raw materials that give a moist feeling.

[Means to solve the problem]

The present inventor completed the present invention as a result of intensive research to solve the above problems.

That is, the present invention is a cosmetic raw material obtained by coating powder particles used in cosmetics with a liquid mixture of conchiolin hydrolyzate and a moisture-retaining polymer and drying the mixture.

The moisturizing polymer substance is at least 1f selected from 11'# consisting of hyaluronic acid, collagen, chondroitin sulfate, and elastin! Ti or more is preferable, but other than that,
The material is not particularly limited as long as it is a moisture-retaining polymeric material that is soluble in conchiolin hydrolyzate, has a molecular weight of several thousand or more, and has the ability to coat powder.

Examples of powders used in cosmetics include titanium oxide,
At least one selected from the group consisting of talc, zinc oxide, magnesium carbonate, sericite, and red iron oxide may be used, but the material is not particularly limited.

The conchiolin hydrolyzate is dissolved in a moisture-retaining polymer substance that is compatible with the conchiolin hydrolyzate. At this time, purified water is added and stirred if necessary.

The amount of purified water is determined by taking into account the ease with which it can be mixed with the powder, but the concentration of the moisturizing component -r/substance is 0.5 to 10.
Approximately % by weight is appropriate.

The proportion of conchiolin hydrolyzate varies depending on the ability of the moisture-retaining polymer substance to coat the powder, etc., but is suitably between 1 and 30% by weight.

To this is added the above-mentioned powder in an amount of 5 to 500 times the amount of dry LII of the moisture-retaining polymeric substance and conchiolin hydrolyzate, and the mixture is thoroughly mixed until uniformly dispersed.

Furthermore, if necessary, gradually add an organic solvent such as ethanol,
It is also possible to add acetone or the like to precipitate a moisture-retaining polymer substance on the surface of the powder, and then distill off the solvent under reduced pressure.

Then, after removing the liquid part of the dispersion by centrifugation, filtration, etc., if necessary, the heated powder is dried at a low temperature.
A powder whose particle surface is coated with both a conchiolin hydrolyzate and a moisture-retaining polymer substance is prepared. According to the method of the present invention, the coating power of conchiolin hydrolyzate on powder is strengthened by adding a moisturizing polymeric substance, thereby expanding the range in which the effectiveness of conchiolin hydrolyzate can be utilized in oil-based color cosmetics. Furthermore, if the method of the present invention is applied to a hydrophobic powder, the conchiolin hydrolyzate can retain moisture due to its water solubility and the moisture retention ability of the moisture-retaining polymer substance. It is retained in substances and has enhanced covering power on the surface of powder particles, and even hydrophobic powders can maintain good dispersibility in aqueous cosmetics.

As described above, the cosmetic powder of the present invention further reduces irritation to the skin when a cosmetic containing the powder is used on the skin due to the synergistic effect of the conchiolin hydrolyzate and the moisturizing polymer substance. In addition to increasing safety, it further enhances effects such as spreadability, staining, and adhesion to the skin, and imparting a moist feeling to the skin.

[Manufacturing examples, examples]

Below are production examples, cosmetic examples, and comparative formulation examples.
The present invention will be explained in more detail. However, the present invention is not limited to this example (61 etc.). The % used below is % by weight.

(Production Example 1) 10 g of a 2.5% aqueous solution of conchiolin + collagen-coated titanium oxide conchiolin hydrolyzate and 50 g of a 2% aqueous solution of water-soluble collagen are mixed well, and 100 g of titanium oxide is mixed well.

After concentrating this under reduced pressure, it was pulverized to obtain conchiolin+collagen-coated titanium oxide.

(Production Example 2) Conchiolin + collagen-coated talc 10 IC of a 2.5% aqueous solution of conchiolin hydrolyzate and 50 g of a 2% water-soluble collagen aqueous solution were mixed well, and talc 1
．． Mix OOg well.

After concentrating this under reduced pressure, it was pulverized to obtain conchiolin+collagen etalc.

(Production Example 3) Conchiolin + hyaluronic acid and sericite 10 g of a 2.5% aqueous solution of conchiolin hydrolyzate, 50 g of a 2% hyaluronic acid aqueous solution, and 200 g of purified water are mixed well, and 100 g of sericite is mixed well.

250 ml of ethanol was gradually added to this while stirring.

This was centrifuged to remove water and ethanol, concentrated under reduced pressure, and then pulverized to obtain conchiolin + hyaluronic acid-coated sericite.

(Production Example 4) Conchiolin + sodium chondroitin sulfate coated nylon powder 10 g of a 2.5% aqueous solution of conchiolin hydrolyzate, 50 g of a 2% aqueous solution of sodium chondroitin sulfate, and 20 g of purified water
Add 0 ml and mix well, then add 100 ml of nylon powder.
Mix well.

250 ml of ethanol was gradually added to this with stirring.

This was centrifuged to remove water and ethanol, concentrated under reduced pressure, and crushed to produce conchiolin + sodium chondroitin sulfate nylon powder.

(Example 1) Compact Powder A Liquid Paraffin Lanolin Cholesterol B Coated Talc Obtained in Production Example 2 Coated Titanium Oxide Obtained in Production Example 1 190% Sericite Kaolin Zinc Stearate Red Iron Oxide Flavor After thoroughly mixing A and heating and melting the mixture to make it homogeneous, the well-mixed B was added, the mixture was pulverized uniformly, and the mixture was pressed into a medium plate.

(Example 2) Ointment type Haboko A liquid paraffin 20.0 Ceresin 15.0 Vaseline
＼ 40.0 Lanolin
5. Coated talc obtained in OB production 2
5.0 Coated titanium oxide obtained in Production Example 1 5.0 Kaolin 5.0 Red iron
3,0 yellow iron oxide
1.0 fragrance
1. Mix OA well,
After heating and melting to make it homogeneous, add well-mixed B and knead with a roll mill.

Next, heat it again to melt it, adjust the color, defoam it, and then pour it into a container.

(Example 3) Emollient Cream A Liquid Paraffin 15.0 Octyldodecyl myristate 3.0 Jojobaura
2.0 lanolin
2.0 cetanol 5
．． 0 stearic acid 4. 0 Valmitic acid 4.0 Glycerin monostearate 3.0 Polyoxyethylene (20 mol) 1,0 Cetyl ether antioxidant 0. 2B Purified water 45.1 Triethanolamine 1.01.3 Butylene glycol 7.0 Propylene glycol
5.0 Preservative 0.20 Coated nylon obtained in Production Example 4 2.0 Powder D8 Material 0. 5A and B
Weigh each and heat to about 70°C. While stirring A, gradually add B. When the temperature reaches about 60°C, add C and D and cool to room temperature.

(Example 4) Compact Powder A Squalane 4.0 Beeswax 0.6 Cholesterol
0.1B Coated titanium oxide obtained in Production Example 1 50.0 Talc
34,2 Kaolin 4.8
Zinc stearate 1.0 red iron
2.0 yellow iron oxide
2.5 black oxide chichi
. , 5 fragrance 0
- After thoroughly mixing 3A and heating and melting it to make it homogeneous, the well-mixed B was added, and the mixture was pulverized uniformly and pressed into a medium plate.

(Cosmetic Safety Test Method) There are various methods for testing the safety of cosmetics, but in the case of color cosmetics, it has been difficult to obtain results that correlate with actual use. After considering various tests, we adopted the Kawa method as a test method for color products, especially powders.

The Kawa method is a method that microscopically determines irritability using morphological changes on the skin surface as an indicator.It is widely used in the evaluation of fibers and fiber treatment agents as a safety prediction test for skin irritation, and is used to prevent skin problems. It has been proven that there is a high correlation between The Kawa method is a method that is close to actual use, as the sample is administered in a semi-open state where the test site is simply covered with gauze. Furthermore, by applying a certain control substance at the same time and subtracting the stimulus index of the control from the stimulus index of the sample, it has the advantage of eliminating fluctuations due to individual differences and seasonal differences.

[, T11: For details, see "Skin" magazine, Vol. 26, No. 5.
No. (1981], OJl)] The coated powder obtained in Production Example 1 and the titanium oxide before coating of the present invention as a comparative example; The coated powder obtained in Production Example 2 and the present invention as a comparative example. Talc before coating, 11) in Production Example 3! A safety test was conducted using the Kawa method on Il'm powder and, as a comparative example, sericite before coating of the present invention.

The results are shown in Table 1. Kawagi's judgment is based on the number of people who have pitted skin grooves (B stage) over the entire visual field.
3B indicates that three people are deaf as described above.

Table 1 (Comparative Formulation Example 1) A compact powder was prepared by replacing the talc, titanium oxide, and sericite coated according to the present invention in Example 1 with the powder before coating.

(Comparative Prescription Example 2) In Example 4, titanium oxide coated with the present invention was added to titanium oxide coated with only conchiolin hydrolyzate, and the other conditions were the same as in Example 4. I created a compact powder.

(Comparative Formulation Example 3) In Example 4, the titanium oxide coated according to the present invention was replaced with titanium oxide coated only with collagen, which is a moisturizing polymeric substance, and the other conditions were the same as in Example 4. I created a compact powder.

86 women (19 to 54 years old) tested the childishness confirmation example and comparative prescription example.

The test method was to use the Examples and Comparative Prescription Examples for one month and evaluate 1d5.

As a result, for Example 1 and Comparative Formulation Example 1, the number of people who felt irritation was 0 in Example 1 and 4 in Comparative Example 1.

The sensory items were as follows.

Example 1 and Comparative Example 1 Example 4 and Comparative Formulation Example 2 Actual Infection...14 and Comparative Formulation Example 3 [Effects of the Invention] Conventionally, since conchiolin hydrolyzate is water-soluble,
Although it has been difficult to use conchiolin hydrolyzate in color cosmetics, the method of the present invention makes it possible to apply a strong and uniform coating to the powder blended into cosmetics, making conchiolin hydrolyzate suitable for use in oil-based color cosmetics. could be applied.

Moreover, by applying a coating to a hydrophobic powder using the method of the present invention, it was possible to make the powder hydrophilic and improve its dispersibility in emulsions and other water-based cosmetics.

Conchiolin hydrolyzate has low hardness and is gentle on the skin.
Its action is mild, and since it contains amino acid residues, it softens the effect of pH.

It is also suitable as a carrier for drugs, fragrances, pigments, etc.

On the other hand, when moisturizing polymeric substances are coated on the surface of powder, they change the powder's inherent oil-absorbing and water-absorbing properties, causing the dryness of cosmetics and the skin's dryness when applied to the skin. Improve adhesion.

However, by using conchiolin hydrolyzate and a moisture-retaining polymeric substance together as in the present invention, the conchiolin hydrolyzate is firmly retained in the moisture-retaining polymeric substance due to the water-solubility of the conchiolin hydrolyzate. It is possible to strengthen the powder body and exert a synergistic effect that further enhances the effect of the conchiolin hydrolyzate on the skin.

Therefore, cosmetics containing powder coated by the method of the present invention have less irritation to the skin, are highly safe, spread easily, blend well with the skin, have good bone quality, and leave a moist feeling on the skin. Demonstrates extremely excellent effects such as giving.

Claims (1)

[Scope of Claims] 1. A cosmetic containing a cosmetic raw material obtained by coating powder particles used in cosmetics with a liquid mixture of conchiolin hydrolyzate and a moisturizing polymer substance and drying the mixture. 2. Moisturizing polymeric substances include hyaluronic acid, collagen,
The cosmetic according to claim 1, which is at least one selected from the group consisting of chondroitin sulfate and elastin. 3. Powders used in cosmetics contain titanium oxide, talc,
The cosmetic according to claim 1, which is at least one selected from the group consisting of zinc oxide, magnesium carbonate, sericite, and red iron.