JPH11228334A - Cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cosmetic having a high carbon dioxide-holding property, persisting a blood circulation-stimulating effect, improving the drabness of skin, etc., free from a slimy touch and giving an excellent touch by controlling the viscosity of the cosmetic to a specific value and maintaining the carbon dioxide concentration of the cosmetic at a specific value for a specified time, when extruded. SOLUTION: This cosmetic containing carbon dioxide has a viscosity of 100-500,000 mPa.s at 25 deg.C and maintains the concentration of carbon dioxide at >=60 ppm for 15 min, after extruded. In order to maintain the concentration of the carbon dioxide, preferably a pH-adjusting agent such as citric acid or phosphoric acid is added to the cosmetic to control the pH of the cosmetic to <=7. The viscosity of the cosmetic is preferably adjusted by adding a thickening agent such as a carboxivinyl polymer. Preferably the thickening agent has a coating film strength of >=6.0×10<4> g/cm<2> .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic composition having high persistence of carbon dioxide gas, a long-lasting effect of promoting blood circulation, an effect of improving skin color, dullness and darkness, and having excellent sensation without sliminess. About.

[0002]

2. Description of the Related Art It is known that carbon dioxide has a vasodilating action. For cosmetic use, for example, cosmetics in which carbon dioxide is mixed with an aqueous cosmetic and sealed in a pressure-resistant container (Japanese Patent Laid-Open No.
An aerosol product in which a stock solution containing carbon dioxide is sealed in an inner bag of an aerosol container having a double structure (JP-A-8-253408) is known. However, in these cosmetics containing carbon dioxide, it is difficult to keep carbon dioxide in cosmetics for a long time, and sufficient blood circulation promoting effect is obtained because carbon dioxide does not easily remain on the skin during use. And the effect could not be sustained.

[0003] On the other hand, there are cosmetics containing a water-soluble thickener for the purpose of improving usability and stability, but they often have a unique slimy feeling upon application and are often unpleasant.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a carbon dioxide gas having a high persistence, a sustained blood circulation promoting effect,
An object of the present invention is to provide a cosmetic that has an effect of improving dullness, darkness and skin color of the skin, and that has no slimy feeling and is excellent in use feeling.

[0005]

Means for Solving the Problems The present inventors have found that cosmetics having a specific viscosity and containing a certain amount or more of carbon dioxide even after a lapse of time after discharge have high carbon dioxide gas persistence. The present inventors have found that the effect of promoting blood circulation is sustained, has no slimy feeling, and is refreshing and excellent in usability, and thus completed the present invention.

That is, the present invention relates to a cosmetic containing carbon dioxide, which has a viscosity at 25 ° C. of 10%.
It is intended to provide a cosmetic composition having a carbon dioxide concentration of 0 to 500,000 mPa · s and keeping the concentration of carbon dioxide gas at 60 ppm or more for 15 minutes after the discharge.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the cosmetic of the present invention, carbon dioxide is dissolved in an aqueous cosmetic and is blended. When the cosmetic is discharged from a container, the concentration of carbon dioxide is 60 ppm or more for 15 minutes after the discharge. Is preferably maintained. This concentration is preferably 100 to 2 from the viewpoint of the blood circulation promoting effect of the cosmetic.
0,000 ppm, particularly preferably 200 to 10,000
ppm. By the way, carbon dioxide gas is present as CO ₂ molecules when the pH of the solution in which it is dissolved is acidic,
It is known to exhibit a vasodilator effect. Therefore, the liquid property of the cosmetic of the present invention is preferably adjusted to pH 7 or less, particularly to pH 5 to 6.5. Note that the pH of the cosmetic is further increased by injecting carbon dioxide gas into the cosmetic and dissolving it in the cosmetic. However, the pH may be adjusted so that the final pH is in the above range.
As the pH adjuster, for example, organic acids such as citric acid and tartaric acid or salts thereof, or phosphoric acid or salts thereof are suitably used.

The cosmetic of the present invention has a viscosity at 25 ° C. of 10 from the viewpoint of improving the persistence of carbon dioxide gas and the feeling of use.
0 to 500,000 mPa · s,
It is preferably from 200 to 200,000 mPa · s, particularly preferably from 500 to 20,000 mPa · s.

In the present invention, a thickener is used to make the composition have a predetermined viscosity. For example, carboxyvinyl polymer, acrylic acid / alkyl methacrylate copolymer,
Synthetic polymers such as polyvinyl alcohol, sodium polyacrylate, polyvinylpyrrolidone, and polyethylene glycol; semi-synthetic polymers such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, methyl hydroxypropyl cellulose, soluble starch, and propylene glycol alginate Sodium alginate, chitin or a derivative thereof, chitosan or a derivative thereof,
Pullulan, guar gum, locust bean gum, quince seed, carrageenan, galactan, gum arabic,
Natural polymers such as tragacanth gum, pectin, mannan, starch, xanthan gum, dextran, succinoglucan, curdlan, gelatin, casein, albumin, collagen, etc .; Swellable clay minerals.

Among them, water-soluble thickeners, for example, carrageenan such as lambda carrageenan and kappa carrageenan, xanthan gum, sodium alginate, carboxyvinyl polymer, polyvinylpyrrolidone, chitin and its derivatives, chitosan and its derivatives, pullulan and the like, especially carrageenan, Xanthan gum, sodium alginate, carboxyvinyl polymers are preferred.

The thickener used in the present invention has a film strength of 6.0 × 10 ⁴ g / cm ² or more, particularly 10.0 × 10 ⁴ g / cm ² , measured as described below, from the viewpoint of carbon dioxide gas persistence. ⁴ to
It is preferably 30.0 × 10 ⁴ g / cm ² . That is,
A mixed solution in which a thickener is added to a base aqueous solution having the following composition in an amount of 1% by weight is poured into a mold, and the mixture is subjected to 25 ° C and 40% RH conditions.
After standing for 5 hours, the thickness is 50 μm, the length is 20 mm, and the width is 100
mm film, and under the same environment of 25 ° C. and 40% RH, a tensilon film strength measuring device UCT-100W (ORIENT
(Manufactured by EC).

[0012]

(Table 1) (Base aqueous solution) (% by weight) Polyvinyl alcohol (Gohsenol EG, manufactured by Nippon Synthetic Chemical Company) 8.0 1,3-butylene glycol 3.0 Purified water Total balance 100.0

One or more of these thickeners can be used as long as the above viscosity can be achieved. The amount used is, for example, 0.01 to 10%, preferably 0.1 to 3%, and particularly preferably 0.3 to 2% in the total composition.

When a whitening agent is added to the cosmetic of the present invention, the synergistic effect of the whitening agent and carbon dioxide significantly improves the effect of improving skin color, dullness of the skin, dark circles and the like. Examples of whitening agents include ascorbic acid and its derivatives, hydroquinone derivatives, kojic acid and its derivatives, animal placenta extracts, plant extracts and the like.

Specifically, examples of ascorbic acid derivatives include L-ascorbic acid phosphate, L-ascorbic acid sulfate, and L-ascorbic acid. Here, Na, K, Ca, M
g, a salt of a monovalent metal such as Al.

Examples of the hydroquinone derivative include hydroquinone or a condensate of an alkylhydroquinone and a saccharide, such as arbutin.

Examples of the kojic acid derivative include kojic acid monobutyrate, kojic acid monocaprate, kojic acid monostearate, kojic acid monocinnamoate, kojic acid monobenzoate, kojic acid dibutyrate, kojic acid dipalmitate, kojic acid distearate, And kojic acid dioleate.

Examples of the animal placenta extract include those extracted from the placenta of a mammal by a conventional method, such as a placenta extract generally marketed as a water-soluble placenta extract.

Examples of the plant extract include tea, cuckoo, clove, liquorice, loquat, spruce, black carrot, peonies, hawthorn, Bakumonto, ginger, matsukasa, souhakuhi, kouboku, chinchinko, senyaku, ogon, chamomile, artea, Examples include extracts obtained from plants such as Spiraea, Dutch mustard, kina, comfrey, rosemary, and funnel.

Of these, plant extracts, and extracts of tea, chamomile, cuckoo, altea, clove, loquat and the like are particularly preferable.

These whitening agents may be used alone or in combination of two or more.
-10%, more preferably 0.1-5%, particularly preferably 0.1-3%. In the present invention, when a plant extract is used, the amount is shown as a dry solid content. The cosmetic of the present invention is obtained by dissolving or dispersing the above-mentioned thickener, whitening agent and other components in an aqueous medium mainly composed of water, and dissolving a predetermined concentration of carbon dioxide gas in the aqueous medium.

The cosmetic of the present invention is preferably of a non-self-injection type sealed in a pressure-resistant container in order to stably keep carbon dioxide gas. As a method, for example, a cosmetic is placed in a pressure-resistant container, and a high-pressure carbon dioxide gas or a mixed gas containing the same is sealed therein, a cosmetic containing a carbonate such as sodium bicarbonate is placed in the pressure-resistant container, A pH adjuster is added to this to generate carbon dioxide gas, and a method of immediately sealing or a method of sealing the cosmetic with dry ice pellets in a container is adopted. preferable.

By doing so, a part of the carbon dioxide gas is dissolved and blended in the cosmetic, and a part thereof is present as a gas in the container. The blending amount of carbon dioxide can be adjusted by the amount of carbon dioxide gas injected (injected).

The pressure-resistant container used here is not particularly limited as long as it can withstand the above pressure and maintain the cosmetic in a sealed state until it is used after its preparation. For example, metal containers such as aluminum and tinplate, Synthetic resin containers such as acetal resins and polycarbonate resins and glass containers are used.

In the present invention, it is preferable to use a container having a double structure as the pressure-resistant container. Here, as the container having the double structure, for example, a pressure-resistant container having a resin inner bag in an outer container can be used. When using such a container, the cosmetic of the present invention is sealed in an inner bag, and a pressurized gas is sealed in an outer container. Here, examples of the outer container include the same ones as described above, and examples of the resin used for the inner bag include polyethylene, nylon, and those having a single-layer or multilayer structure such as an ethylene-vinyl alcohol copolymer. A resin obtained by combining two or more of these resins or a resin partially using aluminum may be used. Liquefied petroleum gas (LPG),
Dimethyl ether, nitrogen, carbon dioxide, chlorofluorocarbon and the like can be used alone or as a mixed gas. 25 ° C of gas
The pressure in may be any pressure as long as the liquid in the inner bag can be sprayed, and is preferably 0.1 to 1.0 MPa, more preferably 0.3 to 0.
95MPa is good. In particular, when carbon dioxide gas or a mixed gas containing the same is present outside the inner bag (in the outer container), the carbon dioxide gas passes through the inner bag and is supplied to the cosmetic. Highly maintainable and preferred. In this case, polyethylene is preferable as the inner bag.

The cosmetic of the present invention enclosed in a container having a double structure is, for example, filled in the inner bag with the cosmetic (which may or may not contain carbon dioxide), It is manufactured by injecting pressurized gas containing carbon dioxide gas into the outside of the inner bag, sealing the outer container, and then aging. By this aging, the carbon dioxide gas press-fitted into the outer side of the inner bag penetrates into the inner bag and dissolves in the cosmetic. One week at room temperature is usually sufficient for such aging, but the period can be shortened by heating.

In the cosmetic of the present invention, in addition to the above-mentioned components, components used in ordinary cosmetics can be appropriately blended as long as the effects of the present invention are not impaired.

The cosmetics of the present invention include, for example, lotions, emulsions,
It can be any of hair lotion, hair tonic, shampoo and the like.

[0029]

EFFECT OF THE INVENTION The cosmetic of the present invention has a high carbon dioxide gas persistence, a sustained blood circulation promoting effect, a skin color improving effect, a skin dullness / bear improvement effect, and a slimy feeling. It has a good feeling.

[0030]

EXAMPLES Example 1 Cosmetics having the compositions shown in Tables 2 and 3 were produced by a conventional method.
The product was obtained by sealing in a pressure vessel. The resulting cosmetics were evaluated for feeling of use and residual carbon dioxide. Table 2 shows the results
And Table 3 together.

(Evaluation method) (1) Feeling of use: Feeling of use immediately after applying an appropriate amount (0.5 to 1 g to the whole face) of each cosmetic by 10 expert panelists (whether or not there is a refreshing feeling and nullness) ) Was sensory evaluated. ：: 7 or more answered that they were good. Δ: 4 to 6 persons answered that it was good. X: Three or less answered that it was good.

(2) Carbon dioxide gas persistence: room temperature and normal pressure (25
C., 1013 hPa), the carbon dioxide concentration within 3 minutes after discharge of the cosmetic and the carbon dioxide concentration after 15 minutes were measured with an ion analyzer EA940 (manufactured by ORION).
The concentrations after 5 minutes were compared and evaluated according to the following criteria. A: 85% or more of carbon dioxide gas remains after 15 minutes. Good: 70% or more of carbon dioxide gas remains after 15 minutes. Δ: After 15 minutes, 30% or more and less than 70% of carbon dioxide gas remains. ×: Less than 30% of carbon dioxide gas remained after 15 minutes.

[0033]

[Table 2]

[0034]

[Table 3]

Example 2 A cosmetic having the composition shown in Tables 4 and 5 was produced by a conventional method.
The product was obtained by sealing in a pressure vessel. About the obtained cosmetics, the feeling of use was evaluated similarly to Example 1, and the dullness improvement effect was evaluated by the following method. The results are shown in Tables 4 and 5.

(Evaluation method) The effect of improving dullness: 10 people suffering from dullness
An appropriate amount of each cosmetic was applied to the face, and the effect of improving dullness when this was continued once or twice a day for two weeks was compared with the sensory evaluation before use. ：: 7 or more people felt that dullness was improved. Δ: 4 to 6 people felt that dullness was improved. X: Three or less felt that dullness was improved.

[0037]

[Table 4]

Example 3 A cosmetic having the composition shown in Table 6 was produced and sealed in a pressure-resistant double container to obtain a product. In addition, the composition was put in the inner bag of the double container, and a gas containing carbon dioxide was injected between the outer container and the inner bag to produce the double container. The obtained cosmetic was discharged within 3 minutes and 15 minutes.
Minutes later, the desired CO ₂ concentration was reached.

[0039]

[Table 5]

Claims (6)

[Claims] 1. A cosmetic containing carbon dioxide having a viscosity at 25 ° C. of 100 to 500,000.
A cosmetic that has a mPa · s and keeps the concentration of carbon dioxide gas at 60 ppm or more for 15 minutes after discharge. 2. The cosmetic according to claim 1, further comprising a thickener having a film strength of 6.0 × 10 ⁴ g / cm ² or more. 3. The cosmetic according to claim 1, further comprising a whitening agent. 4. The cosmetic according to claim 1, which is filled in a container having a double structure consisting of an outer container and an inner bag. 5. The cosmetic according to claim 4, wherein the inner bag is made of a carbon dioxide permeable resin. 6. The cosmetic according to claim 5, wherein carbon dioxide or a mixed gas containing the same is press-fitted between the outer container and the inner bag.