JPH0753647B2 - Liquid transparent skin cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a liquid transparent skin cosmetic composition containing a large amount of a crude drug, which is unprecedented. The present invention also relates to a liquid transparent skin cosmetic such as a lotion that does not cause coloring or discoloration.

[Prior art]

2. Description of the Related Art In recent years, cosmetics containing a crude drug of Liliaceae plants such as aloe have been actively developed. It aims to provide consumers with natural and safe cosmetics, and to utilize the unique natural healing powers of herbal medicines to respond to consumers' health consciousness to maintain healthy skin. To do.

However, in general, crude drugs contain components that cause coloring or discoloration, and cosmetics containing a large amount of these components are colored or discolored with the passage of time. Prevents the products from being colored or discolored by suppressing the compounding amount as much as possible.
For this reason, it is the current situation that the action of natural herbs that helps the natural recovery power cannot be fully utilized.

In particular, in the case of liquid transparent skin cosmetics, when a large amount of crude drug is blended, in addition to coloring or discoloration over time, precipitation or turbidity occurs and the commercial value is remarkably reduced. Further, cosmetics containing alcohol such as ethyl alcohol tend to increase the occurrence of precipitation or turbidity with the passage of time. The cause of these precipitates or turbidity is that the organic acid or its salt contained in the crude drug is ion-exchanged with calcium ion or the like, or the polysaccharide is denatured by heat or alcohol so that insoluble components are deposited. It is thought that it causes precipitation and turbidity. Moreover, it is considered that the coloring or discoloration is caused by the oxidation and decomposition of amino acids and the like contained in the crude drug and the involvement of by-products thereof.

Aloe-containing cosmetics are known as a representative of such crude drug-containing cosmetics. This aloe plant has remarkable effects such as a wound healing effect, a cell activation effect and a moisturizing effect. Therefore, if the extracted powder is added to cosmetics,
A remarkable medicinal effect can be expected against skin roughness, cracks, etc., but in order to fully exert this medicinal effect, a large amount of extraction powder to a concentration close to that in the raw grass should be added to cosmetics. Must be compounded. Specifically, it is necessary to mix the extract with 0.5% by weight or more as a dry solid content in the cosmetic.

However, for example, when the aloe extract powder is blended with a colorless or pale blue liquid transparent skin cosmetic such as a lotion to a concentration of 0.5% by weight or more, the resulting cosmetic produces a precipitate or cloudiness immediately after production. , It gradually becomes yellowish brown or discolors with the passage of time. In addition, in a liquid transparent skin cosmetic containing ethyl alcohol, the degree of precipitation or turbidity is large immediately after the production and with the passage of time, and further, coloring or discoloration occurs. It should be noted that, even when it is filtered by a usual method immediately after the production, it causes precipitation or turbidity and coloration or discoloration with time. From this, most of the commercially available Aloe-blended cosmetics contain only 0.1% by weight of the Aloe extract powder, and the Aloe's efficacy was not sufficiently exhibited. The same was also true for other herbal medicines of the family Liliaceae.

[Object of the Invention]

An object of the present invention is to provide a liquid transparent skin cosmetic composition containing a crude drug, which can be mixed in a large amount in a liquid transparent skin cosmetic composition, has little occurrence of precipitation or turbidity over time, and does not cause coloration or discoloration. To provide.

[Structure of Invention]

According to the present invention, 0.5 to 5% by weight as dry solid content of at least one extract of Liliaceae plant is added to a liquid transparent skin cosmetic containing 5 to 20% by weight of ethyl alcohol. In addition, 1 to 10% by weight of at least one compound selected from polyethylene glycol, lactic acid or salts thereof and pyrrolidonecarboxylic acid or salts thereof is blended to prevent precipitation or turbidity and coloration or discoloration in the cosmetic. A liquid transparent skin cosmetic is provided.

According to the present invention, at least one compound selected from polyethylene glycol, lactic acid or salts thereof and pyrrolidonecarboxylic acid or salts thereof is added as an auxiliary component to a liquid skin cosmetic containing ethyl alcohol. Unlike the conventional method, the dry extract powder of Liliaceae plants such as aloe can be contained in the cosmetic at a high concentration of 0.5 to 5% by weight, and the occurrence of starch and turbidity even with the passage of time. It is possible to obtain a herbal medicine-containing liquid transparent skin cosmetic which is extremely small and does not cause coloring or discoloration.

In this case, instead of using the auxiliary component of the present invention, an additive generally known as an anti-settling or turbidity preventing agent for liquid transparent skin cosmetics, for example, a method for sequestering calcium ions by compounding a sequestering agent such as EDTA , Even if the solubilization method of the system by blending a nonionic surfactant with a high HLB value or the modification method of the system by addition of a lower alcohol is applied, a sufficient effect of preventing precipitation or turbidity is not obtained, and coloring Alternatively, even if an antioxidant, an ultraviolet absorber or the like which is generally known as a discoloration preventing agent is added, the excellent coloring or discoloration preventing effect as in the present invention cannot be obtained. Furthermore, glycerin, propylene glycol, sorbit,
Even when a humectant similar to the auxiliary component used in the present invention, such as 1,3-butylene glycol, is added, no effect of preventing precipitation, turbidity, coloration or discoloration is observed, as will be apparent from Comparative Examples below.

Hereinafter, the present invention will be described in more detail.

In the present invention, ethyl alcohol is used to give a refreshing refreshing feeling to the skin and improve the refreshing feeling after use. The blending amount is 5 with respect to the entire cosmetic.
~ 20% by weight. If it is less than 5% by weight, a refreshing refreshing feeling cannot be obtained, and the usability is not preferable. Again 20
If the content is more than 10% by weight, the refreshing feeling is too strong, and it has an adverse effect on the skin, and it is not preferable because it causes precipitation and turbidity.

In the present invention, an extract of Liliaceae plant is used as a crude drug. This extract is obtained by concentrating or further drying the extract obtained by extracting the leaves, roots, stems, and flower fruits of lily plants such as aloe, trillium, garlic, and licorice, by a suitable known method, The blending amount is 0.5 to 5% by weight as a dry solid content with respect to the entire cosmetic. If it is less than 0.5% by weight, the inherent drug effect of the crude drug cannot be sufficiently exhibited, and conversely, if it exceeds 5% by weight, good results cannot be obtained because the coloring component and the insoluble component become large.

Further, as described above, in the present invention, a small amount of a compound selected from polyethylene glycol, lactic acid or salts thereof, and pyrrolidonecarboxylic acid or salts thereof is used in order to prevent precipitation or cloudiness and coloration or discoloration of the liquid transparent skin cosmetic. Both are mixed together.

As the polyethylene glycol, those having a molecular weight of 200 to 4500 are preferably used, and as the salts of lactic acid and pyrrolidonecarboxylic acid, alkali metal salts such as sodium and potassium are preferably used. The compounding amount of these compounds is 1 to 10% by weight based on the whole cosmetic.
If it is less than 1% by weight, the effect of preventing precipitation or turbidity and coloring or discoloration is not sufficient.

In the present invention, it is preferable to adjust the pH to about 4.5 to 6.5, which is the isoelectric point of the skin, in order to minimize the burden on the skin. As the pH adjuster, an acid or alkali commonly used in this type of cosmetics is used, but citric acid, succinic acid, tartaric acid are preferably used. Further, in the present invention, if desired, fragrance, fragrance solubilizer, a small amount of oil and the like can be used, and as other components, astringents, antioxidants, vitamins, ultraviolet absorbers, preservatives, A bactericidal agent, a sequestering agent, a moisturizing agent, a thickener and the like can be added as appropriate.

〔The invention's effect〕

The crude drug-containing liquid skin cosmetic containing ethyl alcohol of the present invention has the above-mentioned constitution, and contains at least one compound selected from polyethylene glycol, lactic acid or salts thereof and pyrrolidonecarboxylic acid or salts thereof as an auxiliary component. Therefore, even if a large amount of the extract of Liliaceae plants, which is a crude drug, is mixed, there is almost no precipitation, turbidity, coloration or discoloration, and the potency of the crude drug is fully exerted, so the product value is extremely excellent. It is a thing.

〔Example〕

 The present invention will be described in more detail by way of examples.

Examples 1 to 5 and Comparative Examples 1 to 3 At room temperature, while stirring the aqueous phase portion with a mixer, an ethyl alcohol phase portion in which a mixture having the following composition was uniformly dissolved was gradually added, and the lotion was made uniform. Was prepared.

[Common composition]

Ethyl alcohol phase part Ethyl alcohol 10.0% by weight POE hydrogenated castor oil (80E.O.) 0.3 〃 Methyl paraoxybenzoate 0.1 〃 Fragrance Appropriate water phase part Purified water Remainder Next, to the lotion obtained above, Table-I Aloe extract powder, polyethylene glycol (15
40), sodium lactate, sodium pyrrolidonecarboxylate, glycerin, and propylene glycol are added to the aqueous phase to prepare various lotions, pH is adjusted to about 6 with acid or alcal, and filtration is performed at 45 ° C for one month. After that, the degree of precipitation or turbidity of the lotion and the degree of coloration or discoloration were evaluated. The results are shown in Table-I.

The aloe extract powder used was obtained by squeezing the raw grass, refining it with activated carbon, and then freeze-drying it, and about 1 part was obtained from 100 parts of the raw grass. Therefore, if 1% by weight of the crude drug is added to the composition, 100% by weight of the herb is added to the composition.

[Examples 6 to 10] A lotion (pH about 6) having the following composition was prepared in the same manner as in Example 1 and evaluated for precipitation or cloudiness and coloration or discoloration after storage at 45 ° C for 1 month. In all of the examples, almost no precipitation, coloring, etc. were observed, which was good. The blending amount is based on weight (%).

Example 6 Trillium extract powder 1.0 Polyethylene glycol (1500) 3.0 Ethyl alcohol 10.0 sorbitol 3.0 polyoxyethylene hydrogenated castor oil (80E.O.) 0.3 methyl parahydroxybenzoate 0.1 EDTA-2Na 0.1 Citric acid trace Perfume trace color containing trace purified Water balance 100 Example 7 Hong Kong liquorice extract powder 1.0 Polyethylene glycol (200) 3.0 Ethyl alcohol 5.0 Glycerin 2.0 Polyoxyethylene oleyl ether (20E.O.) 0.3 Methyl paraoxybenzoate 0.1 Succinic acid Trace fragrance Trace chrominance Trace purified water Remainder 100 Total Example 8 Aloe extract powder 1.0 Potassium lactate 3.0 Ethyl alcohol 20.0 Propylene glycol 2.0 Polyoxyethylene oleyl ether (20E.O.) 0.3 Methyl paraoxybenzoate 0.1 Citric acid Trace fragrance Trace purified water Residue total 100 Example 9 Aloe extract powder 1.0 Polyethylene Glycol (4500) 3.0 Ethyl alcohol 10.0 Polyoxyethylene hardened castor oil (80E.O.) 0.3 para zinc phenolsulfonate 0.2 methyl parahydroxybenzoate 0.1 tartaric trace Perfume trace Purified water balance Total 100 Example 10 aloe extract powder 1.0 Polyethylene Glycol (1500) 2.0 Sodium pyrrolidonecarboxylate 2.0 Ethyl alcohol 10.0 Pectin 0.3 Polyoxyethylene oleyl ether (20E.O.) 0.3 Methyl paraoxybenzoate 0.1 Citric acid Trace fragrance Trace purified water Residual total 100 [Examples 11 to 13, Comparative Examples 4 and 5] As in Example 1, a lotion (pH about 6) shown in Table-11.
Was prepared and evaluated for precipitation or turbidity and coloration or discoloration after storage at 45 ° C for 1 month. The results are shown in Table-11.

Claims (1)

[Claims] 1. A liquid transparent skin cosmetic containing 5 to 20% by weight of ethyl alcohol, and 0.5 to 5% by weight as a dry solid content of at least one kind of extract of Liliaceae plant. Furthermore, 1 to 10% by weight of at least one compound selected from polyethylene glycol, lactic acid or salts thereof and pyrrolidonecarboxylic acid or salts thereof is added to prevent precipitation or turbidity and coloration or discoloration in the cosmetic. A characteristic liquid transparent skin cosmetic.