JPH04364118A - Aerosol cosmetic - Google Patents

Abstract

PURPOSE:To prevent the decomposition of L-ascorbic acid and to obtain an aerosol cosmetic, especially skin-beautifying cosmetic containing L-ascorbic acid in a stably compounded state by compounding L-ascorbic acid with a carbonate and/or a phosphate. CONSTITUTION:The objective aerosol cosmetic containing stably compounded L-ascorbic acid and having skin-beautifying effect is produced by compounding about 0.01-10wt.% of L-ascorbic acid and about 0.01-10wt.% of a carbonate such as an inorganic carbonate (e.g. sodium carbonate and sodium bicarbonate), an organic carbonate (e.g. guanidine carbonate and L-arginine carbonate) and a phosphate such as trisodium phosphate and sodium monohydrogen phosphate.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to cosmetics with excellent whitening effects and skin improvement effects, and more specifically to aerosol cosmetics stably containing L-ascorbic acid, mainly whitening cosmetics. It is related to.

0002

BACKGROUND OF THE INVENTION Conventionally, L-ascorbic acid has been added to cosmetics for the purpose of whitening the skin. However, L-ascorbic acid itself is chemically very unstable compared to L-ascorbic acid derivatives, so when it is added to cosmetics, L-ascorbic acid may deteriorate over time or when exposed to sunlight or other rays. -Ascorbic acid decomposes or changes in quality, resulting in quality deterioration and coloring. As a preventive measure against these problems, a method of adding urocanic acid (Japanese Patent Publication No. 57-49550) has been attempted. Although these attempts had some success, they were unable to prevent decomposition due to the oxidation temperature of the air and yellowing caused by exposure to sunlight and other light rays, and their stability was not sufficient.

0003

[Problems to be Solved by the Invention] In view of the above circumstances, the present inventors have conducted extensive research to see if L-ascorbic acid can be stably blended. It has been discovered that it is possible to prevent ascorbic acid from being oxidized by contact with air, and from decomposition and deterioration by exposure to light. However, simply forming an aerosol formulation does not prevent L-ascorbic acid from decomposing due to temperature, and a stable formulation cannot be obtained.

0004

[Means for Solving the Problems] As a result of extensive research in order to solve the above problems, the present inventors have found that carbonates and/or phosphates are incorporated into aerosol-type cosmetics. It was discovered that L-ascorbic acid can be stably blended into cosmetics by preventing decomposition of L-ascorbic acid due to temperature, and based on this knowledge, the present invention was completed.

That is, the present invention is an aerosol cosmetic characterized by blending carbonate and/or phosphate with L-ascorbic acid.

The configuration of the present invention will be explained in detail below.

Carbonates used in the present invention include inorganic carbonates such as sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, ammonium carbonate, ammonium bicarbonate, magnesium carbonate, calcium carbonate, cobalt carbonate, and lithium carbonate; Examples include organic carbonates such as guanidine carbonate, L-arginine carbonate, and L-lysine carbonate.
Examples of phosphates include trisodium phosphate, sodium monohydrogen phosphate, sodium dihydrogen phosphate, potassium dihydrogen phosphate, and the like. These can be used alone or in combination.

[0008] The amount of the above carbonate and/or phosphate is preferably 0.01% to 10% by weight in total, when used alone or in combination of two or more. If it is less than 0.01%, L-
The stability of ascorbic acid is poor, but if it is added up to 10% by weight, the stability of L-ascorbic acid is good and there is no problem.
Even if it is blended in an amount exceeding 0% by weight, no further improvement in the effect is observed.

The amount of L-ascorbic acid used in the present invention is generally preferably 0.01% to 10% by weight. If it is less than 0.01% by weight, the effect of L-ascorbic acid will not be exhibited, and even if it is added in excess of 10% by weight, no improvement in the effect will be observed.

The aerosol propellant used in the present invention is a propellant normally used in aerosol products, and specific examples include liquefied petroleum gas (hereinafter abbreviated as LPG), which is propane, isobutane, n-butane, and a mixture thereof;
Isopentane, normal pentane, dimethyl ether and HCFC (hydrochlorofluorocarbon), HF
These are liquefied gases such as C (hydrofluorocarbon), compressed gases such as carbon dioxide gas, nitrogen gas, and oxygen gas. The above propellants can be used alone or in combination.

[0011] The present invention may contain other ingredients as necessary, such as humectants such as alcohol and polyhydric alcohol, surfactants, oils and fats, hydrocarbons, etc., as long as they do not impede the effects.
Fatty acids, water-soluble polymers, powders, ultraviolet absorbers, preservatives,
Drugs, coloring agents, fragrances, and other ingredients commonly used in the cosmetics industry can be blended.

0012

EFFECTS OF THE INVENTION The aerosol cosmetic of the present invention is a whitening cosmetic that stably contains L-ascorbic acid by incorporating carbonate and/or phosphate.

[0013]

EXAMPLES Next, the present invention will be explained in more detail by way of examples. The present invention is not limited thereby. The blending amount is in weight%.

Table 1 shows Example 1 and Comparative Examples 1 and 2 of the lotion spray type.

[0015]

[Table 1] Example 1 contains sodium bicarbonate as an inorganic carbonate, and the residual rate of L-ascorbic acid was high in both the product stored at 50° C. for 2 months and the product left exposed to sunlight for 30 days. Comparative Example 1 is a three-component system of purified water, L-ascorbic acid, and nitrogen gas, and Comparative Example 2 is Example 1 without sodium bicarbonate, and both have a low residual rate of L-ascorbic acid. It was something. The residual rate was calculated using the following formula. The manufacturing method is to dissolve L-ascorbic acid in purified water, 1.
A solution of methyl paraoxybenzoate in 3-butylene glycol was added, followed by dissolution of sodium citrate and sodium bicarbonate. Nitrogen gas was added to this as a propellant.

(Production method) (1) to (6) are stirred and dissolved at room temperature, and (7) to (12) are added thereto with stirring,
Stir to mix. Add (13) to this as a propellant,
A foamy whitening cosmetic was obtained.

(Manufacturing method) (1) to (6) are heated and mixed to 70°C. To this, (7) to (17) were heated and mixed to make 70 and added. Thereafter, (18) is added, uniformly emulsified using a homomixer, and cooled. This was filled into a container, and (19) was added for injection for extrusion to obtain a whitening cream.

(Production method) (1) to (9) are stirred and dissolved at room temperature, and (10) to (13) that have been stirred and dissolved are added thereto. This was filled into a container, and (14) was added as an extrusion propellant to obtain a whitening jelly.

(Production method) (1) to (6) were stirred and dissolved at room temperature, and (9) to (13) were stirred and dissolved therein at 60°C, which was mixed at room temperature to form (7) and (8). ), and add the homogeneous emulsification using a homomixer. (14) was added as a propellant to obtain a foamy whitening cosmetic (emulsion).

(Manufacturing method) (1) to (6) are stirred and dissolved at room temperature, and (7) is added to (8) to (11), which have been stirred and dissolved at room temperature, to solubilize. (12) was added as a propellant to obtain a body whitening spray.

(Manufacturing method) (1) and (2) to (12) are heated and mixed to 70°C. To this, (13) to (19) were heated and mixed and the mixture was heated to 70°C and added. Thereafter, (20) was added, uniformly emulsified with a homomixer, and cooled. This was filled into a container, and (21) was added as an extrusion propellant to obtain a whitening mask. Examples 2 to 7 were aerosol cosmetics in which L-ascorbic acid was stably blended.

Claims (1)

[Claims] 1. An aerosol cosmetic comprising a carbonate and/or phosphate and L-ascorbic acid.