JPH03188007A - Transparent cosmetic of solubilization type - Google Patents

Abstract

PURPOSE:To obtain the title cosmetic having transparent appearance, stability with day, skin safety, skin adaptability and smooth finish free from greasiness by blending an alkyl glycoside with saponin, oily substance and water in a fixed ratio. CONSTITUTION:A transparent cosmetic of solubilization type comprising four components of 0.01-5.0wt.% alkyl glycoside shown by the formula (R is 8-22C alkyl or 8-22C alkenyl; n is 1-5), 0.01-5.0wt.% saponin, 0.0001-1.0 wt.% oily substance and water. Octyl beta-D-galactoside may be cited as the alkyl glycoside and oil-soluble vitamins, oil-soluble hormones, animal and vegetable oils, etc., as the oily substance. When the alkyl glycoside is combined with saponin and used as a solubilizer, the cosmetic having stability and safety, showing good touch free from precipitation and turbidity during preservation is obtained.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a solubilized transparent cosmetic, and more specifically, it has a transparent appearance, good oral stability and skin safety, and when used as an application, It blends into the skin while giving a good feel to the skin.
To provide an excellent solubilized transparent cosmetic with a moist and smooth finish and no sticky feeling.

[Conventional technology]

In recent years, many studies have been conducted on solubilization.

As a result, solubilizers and solubilization techniques have advanced, and highly stable solubilized products have been utilized in many fields.

Those solubilizers are nonionic surfactants.

Anionic surfactant, cationic surfactant.

and amphoteric surfactants.

However, solubilized cosmetics using these synthetic surfactants generally have the disadvantage that they tend to irritate the skin and hair.

Even among nonionic surfactants, which are said to be the least irritating, many of them have problems such as irritation for some people due to their presence of polyoxyethylene chains, etc. There is a point.

Against this background, alkyl glycosides, which are nonionic surfactants that do not have polyoxyethylene chains, are attracting attention.

JP-A-59-130210 discloses alkyl glycosides as a mild cleaning composition, JP-A-0F-25709 as a clean room cosmetic, and JP-A 1203036 as an emulsified composition and emulsified cosmetic. A blended cosmetic is disclosed. However, these compositions do not have the desired appearance characteristic (transparency) of the present invention.

It has been difficult to obtain solubilized transparent cosmetics that are excellent in all aspects of oral stability, skin safety, and sensory properties.

In addition, solubilized cosmetics using only the above alkyl glycosides as solubilizers have poor solubilizing ability for -i, especially when a polar substance such as ester oil is used as an oily substance. When stored under low temperature conditions (below 5°C) or high temperature conditions (above 40°C), they tend to form precipitates or become cloudy, resulting in problems with oral stability. Also,
Further improvements were needed in terms of appearance characteristics (transparency), sensory characteristics, etc.

[Problem to be solved by the invention]

In view of the above circumstances, the present inventors have conducted intensive research to solve the above problems, and have found that when an alkyl glycoside represented by the general formula (I) described later and saponin are used in combination as a solubilizer, preservation There is no precipitation or turbidity in the product, it has a transparent appearance, has good oral stability and skin safety, and when applied, it blends into the skin while giving a good feel to the skin, leaving a moist and smooth finish. They discovered that there is no sticky feeling and completed the present invention.

[Means to solve the problem]

The present invention is a solubilized transparent cosmetic containing an alkyl glycoside represented by the following general formula (I), saponin, an oily substance, and water.

(In the formula, R represents an alkyl group or alkenyl group having 8 to 22 carbon atoms, and n represents an integer of 1 to 5.) The structure of the present invention will be explained in detail below.

The compound represented by the general formula (I), that is, the alkyl glycoside used in the present invention is a known substance, for example, octyl β-D-galactoside.

nonylene α-D-glucoside, decyl-β-D-glucoside, undecylene-β-D-maltoside.

Dodecyl-β-D-maltoside, tridecylene-α-D
Examples include, but are not limited to, -galactoside, tetradecyl-α-D-galactoside, pentadecylene-β-D-)rehaloside, and eicosyl-β-rehaloside.

The alkyl glycoside represented by the above general formula (I) is safe for the human body, and its skin irritation was tested according to the Draize method, and both the animal skin irritation score and the human skin irritation score were 0, indicating no irritation. It has been confirmed that it is an irritant.

The general formula (I) in the solubilized transparent cosmetic of the present invention
The alkyl glycosides represented by are used alone or in combination as a solubilizer.

Its content is from 0.01 to 0.01 based on the total amount of the composition.
5.0% by weight, preferably 0.1-1.0% by weight.

If the alkyl glycoside content is less than 0.01% by weight, the solubilizing ability will be poor and the appearance will not be transparent;
If it exceeds this value, the feel during use tends to deteriorate.

The saponin used in the present invention is a known substance and is a nonpolar group called sterol or triterpene (sabonigen).
and tang (pentoses, hexoses).

It is defined as a compound in which uronic acid (such as uronic acid) is bound.

With the exception of certain starfish, saponins are widely found in the plant kingdom, and many types of saponins exist in a single plant.

In the present invention, there are no particular limitations on the source or the method for obtaining them, but in particular saponins obtained from licorice (α- or β-glycyrrhizic acid or derivatives thereof), Sapindica pericarp extract, and soybean saponin.

Preferable examples include extracts from the rhizome of Chu, tea seeds, and camellia seeds.

The saponins may be used singly or in combination.

Its content is 0.01-5 based on the total amount of the composition.
．． 0% by weight, preferably 0.1-1.0% by weight.

If the content of saponin is less than 0.01% by weight, the solubilizing ability will be poor and the appearance will not be transparent, and if it exceeds 5.0% by weight, it will not be completely dissolved in the system and will form a precipitate, or the system will deteriorate. They tend to be colored and also tend to make cosmetics feel uncomfortable when used.

The oily substances used in the present invention refer to oily substances in a broad sense, including oil-soluble fragrances extracted from natural animals and plants, synthetic oil-soluble fragrances, and oil-soluble vitamins (e.g., vitamin A, vitamin D, vitamin E, vitamin F). , vitamins such as vitamins, pyridoxine caprilate, pyridoxine cybalmitate, d2-α-tocopherol acetate, dl nicotinic acid.

α-tocopherol, vitamin derivatives such as ascorbyl civalmitate, ascorbyl monopalmitate, ascorbyl monostearate, etc.), oil-soluble hormones (e.g., estradiol, ethinylestradiol,
estrone, diethylstilbestrol, etc.), oil-soluble pigments (e.g. Sudan ■, tetrabucom fluorescein, dibrome fluorescein, fluorescein, quinizarin green SS, etc.), oil-soluble ultraviolet absorbers (e.g.
oxybenzone, methyl 25-diisopropyl cinnamate, etc.), animal and vegetable oils (e.g., avocado oil).

olive oil, almond oil, palm oil, etc.), higher aliphatic hydrocarbons (e.g. liquid paraffin, squalane, etc.)
, higher fatty acids (e.g., isostearic acid, oleic acid, etc.), higher alcohols (e.g., isostearyl alcohol, octyldodecanol, etc.), ester oils (
For example, isopropyl myristate, octyldodecyl myristate, etc.).

These oily substances may be used singly or in combination.

Its content is 0,0001 based on the total amount of the composition.
~1% by weight, preferably ~0.3% by weight.

The content of oily substances is 0. If OOO is less than 1% by weight, the inherent characteristic effects of the oily substance will be reduced, and if it exceeds 1% by weight, it tends to be difficult to solubilize. Purified water such as ion exchange water is generally used as the water in the present invention.

Its content is 45-99% based on the total amount of the composition.
0% by weight, preferably 60-90% by weight.

Although the solubilized transparent cosmetic composition of the present invention does not require the inclusion of ethanol, adding and mixing an appropriate amount of ethanol can provide a refreshing feeling and improve the drying rate.

The content of ethanol is 0 to 50% by weight, preferably 5% by weight.
~30% by weight.

Further, when the solubilized transparent cosmetic composition of the present invention is a two-layer conditioning lotion or the like, known required pigments may be further added and blended.

The pigment content is 10% by weight or less, preferably 0.5 to 10% by weight.
It is 5% by weight.

Pigments include kaolin, mica, and sericite.

Examples include talc, yellow iron oxide, red iron oxide, and the like.

In addition, the solubilized transparent cosmetic of the present invention may contain known additive ingredients as necessary, such as a humectant, a skin or hair nutrient,
Water-soluble pigments, ultraviolet absorbers, astringents, water-soluble natural polymers (casein soda, pectin, xanthan gum, karaya gum, locust bean gum, carrageenan, etc.), clouding agents (acrylic styrene copolymer dispersion, etc.), pearl-like luster A imparting agent (fish scale foil, etc.) may be added.

The cosmetics of the present invention include, for example, skin conditioning lotions.

Wipe lotion, softening lotion, acne treatment lotion, aftershave lotion.

Examples include cleansing lotion and hair tonic.

Furthermore, when pigments, pearl agents, clouding agents, etc. are added to the cosmetic composition of the present invention, it is possible to obtain a two-layer type lotion, a burl-like lotion, or a cloudy lotion with a beautiful appearance.

〔Example〕

The present invention will be explained in detail below with reference to Examples and Comparative Examples. Note that the content is expressed in weight%.

The properties of the cosmetics investigated in the examples were appearance properties (transparency), oral stability, skin safety, and sensory properties.

The test method is as follows.

(I) Appearance characteristics (transparency) The transparency of appearance was expressed by the measurement results of transmittance.

The transmittance is expressed by the light transmittance of light with a wavelength of 450 nm.

When the value is 80% or more, it is transparent even to the naked eye.

(2) Storage stability Sample compositions were left in a constant temperature bath at 45'C, 30°C or 0°C for 1 to 6 months and visually inspected for turbidity, precipitation, etc.

(3) Skin safety (human patch test) 0.05 g of sample was applied to the side skin of the forearm layer of 25 subjects with a diameter of 1.0 cm.
After occlusive application for 24 hours using a patch test adhesive bandage with a circular lint cloth attached, each sample was evaluated and judged for the skin condition of 25 subjects according to the criteria shown in Table 1 below.

The judgment result is based on the stronger reaction between 1 hour and 24 hours after the removal of the bandage, and the evaluation is (±) or higher.
Table (4) Sensory characteristics: Feeling when using the coating (light feeling, moist feeling).

The finish after application (stickiness, smoothness) was examined by three specialized inspectors and comprehensively evaluated.

Examples 1-4. Comparative Examples 1 and 2 (Skin conditioning lotion) A skin conditioning lotion was prepared with the composition (wt%) shown in Table 2.

As the alkyl glycoside, decyl-β-ri monoglucoside was used.

In addition, the licorice saponin used mainly contains monoammonium α-glycyrrhizinate.

Components 1 to 3 in the table were mixed and dissolved (solution 1), components 4 to 7 in the table were separately mixed and dissolved (solution 2), and solution 2 was mixed with solution 1 to prepare a lotion.

The properties of the lotion obtained are also shown in Table 2.

As can be seen from the table, the lotions of Examples 1 to 4 containing both alkyl glycosides and saponin had good transparency and
Excellent storage stability.

On the other hand, the lotions of Comparative Examples 1 and 2 that lack either alkyl glycoside or saponin have poor transparency and storage stability, resulting in precipitation, turbidity, and oil floating.

The lotion of the present invention also has a comparative example in terms of sensory properties.Comparative Example 3 A skin conditioning lotion was prepared with the following composition (wt%). Examples 1 to 4 and Comparative Example 1.2 as alkyl glycosides
The same decyl-β-D-glucoside was used.

Comparative Example 3 1. Glycerin 5.02 Decyl-β-D-glucoside 0.53, Isopropyl myristate 0.024, Purified water
84.385 Sodium hydrogen phosphate
0.16, ethanol
10. After uniformly mixing and dissolving component 2 in 1 liter of component, gradually add component 3 while treating with a homomixer (solution 1
).

Component 5 is uniformly mixed and dissolved in component 4 (solution 2).

A lotion was prepared by mixing Solution 1 and Solution 2 and further adding Component 6.

Since the lotion prepared by this method did not contain saponin, it had a cloudy appearance and an oil stain appeared on the next day.

Examples 5-8. Comparative Examples 4 to 5 (Aftershave Lotion) Aftershave lotions were prepared with the compositions (wt%) shown in Table 3. Tetradecyl-α-D-galactoside was used as the alkyl glycoside. Moreover, Sapindica pericarp extract was used as the saponin.

The aftershave lotions of Examples 5 to 8 were transparent;
It had good storage stability and sensory properties.

However, the aftershave lotions of Comparative Examples 4 and 5 that lack either alkyl glycoside or saponin produce precipitation and cloudiness. As described above, there are problems with their transparency and storage stability. On the other hand, the aftershave lotion of the present invention is transparent.

Comparative Examples 9 to 15 in terms of storage stability and sensory properties. Comparative Example 6.7 Content of isopropyl myristate in Example 4 (wt%
) was prepared in the same manner as in Example 4, except that .

Table 4 shows the properties of the obtained skin lotion.

As is clear from this result, the content of oily substances is
,OO01-1% by weight (preferably 0.001-0.3
weight%), appearance (transparency), and storage stability.

Comparative Example Day 5.1% by weight of polyoxyethylene (20) polyoxypropylene (8) cetyl ether was used in place of 5.0% by weight of decyl-β-D-glucoside and 0.1% by weight of licorice saponin in Example 4. A skin conditioning lotion was prepared using this as a solubilizer.

The skin safety (human body batch test) results of this lotion and Example 4 are shown in Table 5.

Table 5 As is clear from the results, the skin conditioning lotion of Example 4 using Denru β-D glucoside and licorice saponin is extremely superior in skin safety to Comparative Example 8.

Example 16 (Two-layered conditioning lotion) A two-layered conditioning lotion was prepared with the following composition (% by weight). Dodecyl-β-D-maltoside and octadecyl-α-D-stachyoside were used as the alkyl glycosides, and licorice saponin and soybean saponin were used as the saponins.

Content: 1, ethanol 10. Oλ fragrance (bergamot oil) 0.1 3, zinc sulfate 0.34, zinc white 1.05, red iron
0.016, talc
1.07, dodecyl-β-D-maltoside 0.158, licorice saponin
0.059, soybean saponin 0
．． 110, sodium carbonate 0.21
1. Purified water 87.09 Ingredients 3, 7, 8. in part of the above ingredients 11. and 9 are mixed and dissolved, and a mixture of components 4 to 6, which has been previously sown and mixed, is added to this aqueous solution and dispersed uniformly under stirring.Next, Component 10 is dissolved in the remainder of Component 11, and then mixed with stirring. Gradually add
Furthermore, a two-layer conditioning lotion of the present invention was prepared by uniformly mixing Component 1 with Component 2 dissolved therein.

As a result of investigating the uniform miscibility of this two-layer conditioning lotion during shaking, the powder layer and water layer, which had been separated, were mixed as one after the required number of shaking four times, and the powder was uniformly mixed in the water. A dispersed suspension was produced.

From these results, it was confirmed that this two-layer conditioning rhosidin was easily made into a uniform suspension by shaking and could be stably maintained for an appropriate period of time, making it extremely easy to use.

After a further 11 hours of standing still, it had a beautiful appearance with two layers clearly separated: a transparent colorless water layer and a pale red powder layer.

This two-layer conditioning lotion did not have a sticky feeling when used, had a good feel, and had a good finish after application.

In Example 16, in place of dodecyl-β-D-maltoside, octyl-β-D-galactoside, nonylene-α-D-glucoside, undecylene-β-D-maltoside, and eicosyl-β-D-trehaloside were used. Layered conditioning lotions were also prepared in Example 1.
It showed almost the same behavior as 6.

〔Effect of the invention〕

By containing alkyl glycosides and saponins, the present invention has a transparent appearance, good stability over time and skin safety, and when applied, it blends into the skin while giving a good feel to the skin, making it moist and smooth. Finished in
It is possible to provide an excellent and useful solubilized transparent cosmetic without a sticky feeling.

Procedural amendment (voluntary) ■, Indication of the case 1999 Patent Application No. 328773 2, Name of the invention Solubilized transparent cosmetics 3, Person making the amendment Relationship to the case Patent applicant address Sumida Go, Sumida-ku, Tokyo Chome I7 No. 4 No. 56 The scope of the amendment is to be made in the "Claims" column and the "Detailed Description of the Invention" column 6, and the contents of the amendment (I) The claims are amended as shown in the attached sheet. .

(2) "Octadecyl-α-D-stachyoside" from lines 3 to 4 on page 22 of the specification is deleted.

7. List of Attached Documents (I) Attachment 1 or more copies 1-5-90 Tomobuchi-cho, Bejima-ku, Osaka 534 Kanebo Co., Ltd. Patent Department Telephone (06) 921-1251 Attachment 2. Claims as follows: A solubilized transparent cosmetic consisting of four components (A) to (D).

(A) Alkyl glycoside represented by Gn-R; 0.
01 to 5.0% by weight (R is an alkyl group or alkenyl group having 8 to 22 carbon atoms, G is 5 to 6 - sugar and 1 to 5% by weight)
) (B) Saponin; 0.01 to 5.0% by weight (C) Oily substance; 0.0001 to i,o% by weight (D
)water

Claims (1)

[Scope of Claims] A solubilized transparent cosmetic comprising the following four components (A) to (D). (A) Alkyl glycoside represented by the following formula (I); 0.01 to 5.0% by weight ▲There are numerical formulas, chemical formulas, tables, etc.▼・・・・・・( I
) (In the formula, R represents an alkyl group or alkenyl group having 8 to 22 carbon atoms, and n represents an integer of 1 to 5.) (B) saponin;
0.01-5.0% by weight (C) Oily substance; 0.0001-1.0% by weight (D) Water