JPS6143323B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention does not use synthetic emulsifiers (synthetic surfactants), but is safe for the skin by uniformly and stably emulsifying oil-based substances by using a specific natural bentonite and a specific water-soluble polymer. It relates to a cream or emulsion-like skin cosmetic that is high in quality and has good texture, appearance (texture, gloss, etc.). Conventionally, emulsified skin cosmetics such as creams and emulsions,
The necessary conditions are (1) high safety without irritating the skin, (2) high emulsion stability and stability over time, and (3) chemical stability such as hydrolysis resistance. (4) good appearance such as texture and gloss; and (5) good affinity for the skin. However, in order to satisfy these conditions, careful compositional design such as the selection and specific combination of emulsifiers and the combined use of special base materials has been carried out, but it is not easy to achieve these objectives. In particular, it is very difficult to easily satisfy the above conditions by applying a single emulsifier. For example, polyoxyethylene alkyl ether type surfactants, which are nonionic surfactants, are generally highly irritating to the skin and have poor emulsifying power. In addition, ester type nonionic surfactants such as polyoxyethylene higher fatty acid ester, polyoxyethylene glycerin higher fatty acid ester, and polyoxyethylene sorbitan higher fatty acid ester have poor emulsifying power and poor hydrolysis resistance. Further, anionic surfactants such as higher alcohol sulfuric esters, alkylaryl sulfonates, and higher fatty acid salts have strong degreasing power and are irritating to the skin. Furthermore, cationic surfactants, amphoteric surfactants, etc. have skin irritation properties and have poor emulsifying power. In view of the current situation, the present inventors conducted intensive research on emulsifying systems that have less skin irritation, are highly safe, and have good emulsifying properties in the absence of synthetic emulsifiers. The present invention has been completed based on the discovery that a very good emulsified system is formed when at least one water-soluble polymer selected from the group consisting of xanthan gum, carrageenan, and hydroxylpropyl cellulose is combined with an oily substance and water. did. The object of the present invention is to provide a cream or emulsion-like skin cosmetic that is substantially free of skin irritation or allergy, is highly safe, has excellent emulsion stability and stability over time, and has a good feel and appearance. Our goal is to provide the following. That is, the present invention uses cation-exchangeable sodium ions in amounts of 100 mg equivalent/100 g or more.
Bentonite containing 160mg equivalent/100g is 0.05~
1.9% by weight and 0.1 to 4.0% of at least one water-soluble polymer selected from the group consisting of xanthan gum, carrageenan, and hydroxypropyl cellulose.
5-60% by weight of oily substances and 30-95% of water.
It is a cream or emulsion-like skin cosmetic prepared by blending % by weight. Hereinafter, embodiments of the present invention will be explained in detail. Bentonite is sodium montmorillonite, a type of natural colloidal hydrated aluminum silicate, and generally has cation exchange ability, hydration property,
It has swelling properties, and its ion-exchangeable sodium content is usually less than 100mg equivalent/100g,
As for the viscosity, the viscosity of the 4% aqueous dispersion is 60~
Many are 150 centipoise. However, in the bentonite used in the present invention,
The content of cation exchangeable sodium ions is
100mg equivalent/100g to 160mg equivalent/100g,
Preferably 115mg equivalent/100g to 160mg equivalent/100g
It is. When it is less than 100mg equivalent/100g,
Emulsion stability (stability over time), texture, gloss (appearance),
The feel, extensibility, and elongation (elongation) during use deteriorate. In addition, if the amount exceeds 160mg equivalent/100g, the texture and gloss will be poor, and the extensibility (elongation) during use will be poor.
The smoothness (smoothness) deteriorates and tends to give a sticky feeling (stickiness). The viscosity is 4%
The viscosity of the aqueous dispersion is 150-800 centipoise.
High purity sodium montmorillonite is obtained from special ore veins or through special physical and chemical treatments. When such high-purity sodium montmorillonite is used, the appearance of the obtained emulsified cosmetics, such as the stability over time, skin texture, and gloss, is significantly improved, and the skin also has a good feeling when used. It gives a crisp feel and no sticky feeling) and can improve the stretchability (spreading), smoothness (smoothness), etc. The amount of bentonite blended (amount used) in the present invention is based on the total amount (total weight) of the prescription ingredients.
0.05-1.9% by weight, preferably 0.2-1.0% by weight. If it is less than 0.05% by weight, the emulsion stability and stability over time will be poor, and if it is more than 1.9% by weight, the texture, gloss, and feel during use tend to be poor. The xanthan gum in the present invention is a linear polysaccharide, which is a water-soluble natural polymer containing D-glyose, D-mannose, and D-glucuronic acid as main components. Carrageenan is also a linear polysaccharide, and is a water-soluble natural polymer containing D-galactose 3,6-anhydro-D-galactose and sulfuric acid as main components. Furthermore, hydroxypropyl cellulose is hydroxypropyl ether obtained by partially reacting cellulose with propylene oxide, and is a water-soluble cellulose derivative. Its hydroxypropyl substitution rate is 67
~72%, and the average molecular weight is preferably 30,000 to 400,000. Although the amount of these water-soluble polymers naturally varies depending on the type of water-soluble polymer, it is usually
It is within the range of 0.1 to 4% by weight, preferably 0.3 to 30% by weight. If the amount of water-soluble polymer blended is less than the required amount, the appearance and stability of the emulsified cosmetic will deteriorate.
Also, if the amount is too high, the appearance, feel, and stability will deteriorate. However, when a required amount of water-soluble polymer is blended, the oily substance can be emulsified uniformly and stably, and the emulsified cosmetic can be obtained with good emulsion stability, stability over time, appearance, feel, etc. Such remarkable effects are not seen at all in other related water-soluble polymers (e.g., pectin, gum guaya, sodium arabic alginate, methyl cellulose, etc.), and are unique to the effects of the present invention. This property is also very clear from the results of the examples described below. The oily substances used in the present invention are oily substances for cosmetics, such as oils and fats, waxes, hydrocarbons, ester oils, higher alcohols, higher fatty acids,
Examples include higher fatty acid monoglycerides and higher fatty acid diglycerides. Examples of oils and fats include castor oil, olive oil, avocado oil, balm oil, cacao oil, etc.; examples of waxes include hollow wax, lanolin, beeswax, paraffin wax, carnauba wax, and candelilla wax; examples of hydrocarbons include petrolatum, etc. , liquid paraffin, ceresin,
Microcrystalline wax, squalane, etc.
Examples of ester oils include butyl stearate, octyl dodecyl myristate, isopropyl myristate, lanolin fatty acid isopropyl ester, butyl stearate, hexyl lanolate, oleyl oleate, diisopropyl adipate, diisopropyl cepatate. Examples of higher alcohols such as esters include stearyl alcohol and oleyl alcohol acid; examples of higher fatty acids include lauric acid, myristic acid, valmitic acid, stearic acid, oleic acid, behenic acid, and lanolin fatty acids; and higher fatty acid monoglycerides. Examples of the higher fatty acid diglyceride include stearic acid monoglyceride and oleic acid monoglyceride, and examples of the higher fatty acid diglyceride include stearic acid diglyceride, but are not limited to these. The oily substances are used singly or in combination, and the blending amount is 5 to 60% by weight, preferably 15 to 50% by weight.
It is. The selection and use of oily substances differ depending on the type of cosmetic and are not limited in any way; however, for emulsion type products such as skin milk, liquid oily substances such as liquid paraffin may be blended. , is preferred, and in this case, it is even more preferred to use a monoglyceride of a higher fatty acid having 14 or more carbon atoms. In creams such as ski cream, it is preferable to use a liquid oily substance, a solid oily substance, and a monoglyceride of a higher fatty acid having 14 or more carbon atoms in combination. The amount of water used is usually 30-95% by weight, preferably
It is 50-90% by weight. Furthermore, small amounts of cosmetic medicinal ingredients, fragrances, preservatives, coloring agents, etc. may be added as desired. Ordinary emulsification methods can be applied to obtain the emulsified cosmetic composition of the present invention. For example, it can be easily obtained by heating an oil phase and an aqueous phase to 50 to 90°C, melting them, mixing them, and dispersing them with a homogenizer. In this case, it is desirable to add bentonite and water-soluble polymer to the aqueous phase. Next, the effects of the emulsified cosmetic of the present invention will be explained in detail. Unlike conventional emulsified cosmetics, the emulsified cosmetic of the present invention does not contain a synthetic surfactant as an essential ingredient, so it is extremely safe for the skin. Incidentally, the data regarding skin irritation and allergic properties of various substances are as follows.

[Table] This measurement was performed using the following method. A Animal skin irritation test Test method: Conducted according to the method of Draize. (1) No erythema or skin formation Erythema 0 Very slight erythema 1 Visible erythema 2 Moderate to severe erythema 3 Severe erythema and slight skin formation 4 (2) Formation of edema No edema 0 Very slight edema 1 Slight edema 2 Moderate edema 4 Evaluation: Based on the calculated score value, the degree of irritation is evaluated as follows. 0 to less than 2 Slight irritation or almost no irritation 2 to less than 5 Moderate irritation 5 to strong irritation B Human skin irritation test Test method: Closed patch test method, test sample placed on the inside of the supra or anterior part Apply a piece of flannel cloth (1.5cm square) coated with this, and cover it with a bandage. After 24 hours, remove the flannel cloth and sample, and judge the degree of reaction according to the criteria below, and again after 48 hours. Judgment: No change - faint erythema ± obvious erythema + edema, blisters, etc. other than erythema
++ Evaluation: + and ++ were considered positive, and evaluation was performed based on the positive rate. Number of subjects: 25 randomly selected males and 25 females Preparation of test samples: Dissolve and disperse each sample in water. C Sensitization test Test method: Sodium lauryl sulfate aqueous liquid 0.1
ml and 0.1 ml of the solution mixed with sodium lauryl sulfate and the sample, respectively, are injected intradermally into the guinea pigs. One week later, the injection site is depilated and the sample is placed in a closed patch for 24 hours.Furthermore, two weeks later, another site is depilated and the sample is placed in a closed patch for 24 hours. After 24 hours, the presence or absence of redness is checked, and the strength of sensitization is determined by the ratio of animals that developed a reaction to the number of experimental animals. Evaluation: 0 to 8 (%) Weak 9 to 28 Mild 29 to 64 Moderate 65 to 80 Strength 81 to 100 Extremely strong In addition, the interfacial tension lowering ability of bentonite, xanthan gum, carrageenan, and hydroxypropyl cellulose is as follows, compared to conventional synthesis. Since it is significantly weaker than a surfactant, the emulsified cosmetic of the present invention is thought to have less transdermal absorption, which is considered to be one of the reasons why the emulsified cosmetic of the present invention causes less skin irritation.

[Table] The cream or emulsion cosmetic of the present invention is suitable for skin cosmetics such as pine surge cream, cleansing cream, skin milk, and hair cream. In summary, the present invention makes it possible to uniformly and stably emulsify an oily substance by using a specific natural bentonite and a specific water-soluble polymer substance without using a synthetic emulsifier, and to improve the rheology of the emulsion. By adjusting and improving the chemical properties and imparting a unique and preferable thixotropy as shown by the SD curve in Figure 1, the product has virtually no irritation or allergy to the skin, is highly safe, and has high emulsion stability.
Excellent stability over time, feel when using (fresh feel without stickiness) appearance (natural skin, gloss)
With this method, it is possible to easily obtain a cream or milky lotion-like skin cosmetic. Such remarkable effects are only manifested by the combination of the specific bentonite and the specific water-soluble polymer, and other similar water-soluble polymers, other clay minerals, and hydrated silicic acid are used. This is an extremely unique substance that cannot be found in salt, etc. Examples will be described below. In the examples, % means % by weight and parts means parts by weight, and the viscosity of an aqueous dispersion of bentonite, etc., the viscosity of a prepared sample cosmetic, the shear-stress curve, and the storage under severe conditions (45°C) stability over time, feel,
Texture, gloss, etc. were examined as follows. (1) Viscosity of aqueous dispersion of bentonite, etc. An aqueous dispersion (200 ml) containing 4% of clay, such as bentonite, was prepared in a conventional manner, and after being left at 20°C for 24 hours, a rotating propeller with a diameter of 2 cm and a clearance of 0.6 cm was prepared. With a homo mixer (TK, HOMO-MIXER type M manufactured by Tokushu Kika Kogyo Co., Ltd.)
After stirring at 1000 rpm for 5 minutes, the mixture was immediately measured using a B-type rotational viscometer (Vismetron VS-AI model manufactured by Toshiba Systems Corporation) using rotor No. 3 at a rotation speed of 60 rpm. (2) Viscosity of the prepared sample cosmetic After 200 ml of the prepared cosmetic sample was left at 20°C for 24 hours, it was measured using a B-type rotational viscometer (manufactured by Toshiba System Corporation, Bismetron VS-AI model).
Measured under the conditions of rotor No. 1 to 3 and rotation speed of 12 rpm. (3) Shear rate-stress curve After the prepared cream was left at 20℃ for one week,
Sampling an appropriate amount and using a cone-plate rotary viscometer, the cone diameter is 58 mm and the maximum shear rate.
Measured at 500 [1/sec] and a temperature of 25℃. (4) Stability over time when stored under harsh conditions Samples of the prepared cosmetics were left in a constant temperature room at 45°C (severe conditions) to examine their stability over time. (5) Skin texture, feel, elongation, gloss, etc. The texture, feel, and elongation of the cosmetics in question were examined by five specialized inspectors, and the gloss was determined according to JIS-
Measurement was performed according to method 2 of the gloss measurement method of Z8741-1962. Example 1 (skin milk) A Formulation 1 Clay (shown in Table 1) 0.6 parts each 2 Xanthan gum 0.4 3 Methylparaben 0.1 4 Fragrance 0.1 5 Liquid varaffin 15.0 6 Pure water 83.8 B Production Add ingredients 1 to 3 and 6 above. Uniformly disperse and dissolve at 80°C (Solution 1). Heat the above component 5 (solution 2). While stirring the next Solution 2 with a homomixer, Solution 1 is added and emulsified. After emulsification, reduce the temperature to 80
Homomixer (7500 rpm/1 minute) while keeping at ℃
Disperse for 15 minutes and then cool. In addition, component 6 was added at 70℃ during the cooling process, and 30℃
After the temperature was lowered to ℃, stirring was stopped. Next, the product characteristics and storage stability over time at 45°C of the emulsified cosmetic prepared with the above formulation were investigated, and are shown in Table 1. As is clear from the results in Table 1, clays other than bentonite have virtually no emulsifying power, and even in bentonite, when the cation-exchanging sodium ion content is less than 100 mg equivalent/gr, the emulsifying power decreases, and the product The stability over time was significantly reduced, and the texture, texture, and gloss were also poor. However, when using bentonite with a cation-exchangeable sodium ion content of 100 mg equivalent/100 g or more (the present invention), emulsion stability (daily stability)
Product with excellent texture (fresh and smooth), natural texture, gloss, and stretchability (O/
A W-shaped milky lotion) is obtained.

[Table] Example 2 (skin milk) The amount of bentonite A ₁ (used in Example 1) was varied as shown in Table 2, and the amount of water added was increased or decreased accordingly to reduce the total amount in the formulation. The same procedure as in Example 1 was conducted except that each volume was adjusted to 100 copies. The results are shown in Table 2.

【table】

[Table] As is clear from this result, the amount of the specific bentonite used in the present invention is 0.05 to 1.9%, preferably 0.2 to 1.2%. If it is less than 0.05% by weight, emulsion stability (stability over time) will deteriorate, and it will be 1.9%.
If the amount exceeds 1, the feel, texture, and gloss during use will deteriorate, and coloring will occur during long-term storage. Example 3 (Skin Milk) Example 3 except that 1.5 parts of the water-soluble polymer shown in Table 3 was used instead of 0.6 parts of bentonite A ₁ and 0.4 parts of xanthan gum as clay, and 82.3 parts of water each. It was done in the same way as 1. The result is the third
Shown in the table.

[Table] As is clear from this result, when xanthan gum, carrageenan, and hydroxypropyl cellulose are used as natural water-soluble polymers, the texture during use (fresh and smooth), It is possible to obtain an emulsified skin cosmetic that is excellent in spreadability, skin appearance, and gloss, and has good stability over time. However, other natural water-soluble polymers known as emulsification aids and having similar properties have weak emulsifying power, making it difficult to obtain emulsified cosmetics with good stability over time, feel, texture, gloss, etc. I can't. Thus, there is a significant difference in the effects of the combination with the specific bentonite. The skin milk obtained using the water-soluble polymer of the present invention is an O/W type emulsion with good texture, gloss, and excellent feel such as spreadability. It was stable. Example 4 (skin milk) Using 0.6 parts of bentonite A ₁ as clay,
Example 1 except that the amount of xanthan gas used was varied as shown in Table 4, and the amount of water added was increased or decreased accordingly so that the total amount in the prescription was 100 parts. I did the same thing. The results are shown in Table 4.

[Table] As is clear from this result, the amount of xanthan gum used is 0.1 to 4.0%, preferably 0.3 to 3.0%. If it is less than 0.1%, the stability over time will decrease, and if it is more than 4.0%, the feel during use, texture, stability over time, etc. will tend to decrease. Skin milk obtained using a water-soluble polymer within this range (cream-like if the water-soluble polymer is 2% or more) is an O/W emulsion with good appearance such as texture and gloss, spreadability, texture, etc. It is also excellent at 45℃
It remained extremely stable for more than four months in the greenhouse. Example 5 (skin milk) Using 0.6 parts of bentonite A ₁ as clay,
Same as Example 1 except that the amount of liquid paraffin used was varied as shown in Table 5, and the amount of water added was increased or decreased accordingly so that the total amount in the prescription was 100 parts. I went to The results are shown in Table 5.

【table】

[Table] As is clear from this result, the amount of liquid paraffin (oil-based substance) used is 5 to 60%, preferably
It is 10-50%. Skin milk obtained by using liquid oil (liquid paraffin) within this range is an O/W emulsion that has good appearance such as texture and gloss, and has excellent spreadability and feel. It remained extremely stable for more than 4 months in a greenhouse. Example 6 (Cleansing Milk) A Formulation 1 Bentonite A ₁ 0.6 parts 2 Xanthan gum 0.4 3 Methylparaben 0.1 4 Fragrance 0.1 5 Liquid paraffin 60.0 6 Oil base (shown in Table 6) 3.0 each 7 Pure water 36.0 B Manufacture of the above ingredients 1 to 3 and 7 are uniformly dispersed and dissolved at 80°C (solution 1). Heat the above component 5 (solution 2). Next, while stirring Solution 2 with a homomixer, Solution 1 is added and emulsified. After emulsification, reduce the temperature
While keeping the temperature at 80℃, use a homomixer (7500 rpm/1
After dispersing for 15 min (min), cool. In addition, component 6 was added at 70℃ during the cooling process, and 30℃
After the temperature was lowered to ℃, stirring was stopped. The product characteristics and storage stability over time at 45°C of each emulsified cosmetic prepared were investigated and shown in Table 6.

[Table] As is clear from this result, other oily substances that can be used in combination with liquid paraffin have a carbon number of
Monoglycerides of 14 or more higher fatty acids are particularly preferred. The skin milk obtained using such higher fatty acid monoglycerides is an O/W type emulsion with good appearance such as texture and gloss, and excellent spreadability and texture. It remained extremely stable for more than a month. Example 7 (Cleansing cream) 1.0 part of bentonite A ₁ used in Example 1,
2.0 parts of hydroxypropyl cellulose, 0.2 parts of methylparaben, and 39.3 parts of water are uniformly dispersed and dissolved at 80°C. To this aqueous solution, a homogeneous molten mixture consisting of 3.0 parts of stearic acid monoglyceride, 6.0 parts of cetyl alcohol, 8.0 parts of tribalmitic acid glyceride, 8.0 parts of myristate triglyceride, and 40 parts of octyldodecanol myristate was added while stirring with a homomixer. Emulsified. After that, stirring was continued for another 15 minutes, and when the temperature was gradually cooled to 70°C, 0.5 part of fragrance was added. After the temperature was lowered to 30°C, stirring was stopped. The cleansing cream of the present invention thus obtained is applied with an O/W type emulsion having thixotropic viscosity as shown in FIG.
The texture and gloss (gloss level was 90) were very good, and it remained stable even when left in a heated greenhouse at 45°C for 6 months. In addition, when used, it has excellent extensibility, extensibility (elongation), smoothness (smoothness), and thixotropic feel, and is non-sticky (adhesive).
It gave a refreshing feel. Furthermore, the animal skin irritation score was 0, the human skin irritation score was 0/25, and the sensitization was weak, and in the practical test conducted by 25 women, no one answered that they felt irritation to their skin. There were none. Next, as a comparison 1, polyoxyethylene cetyl alcohol (10E.
A comparative cleansing cream was prepared in the same manner as in the present invention, except that 20E.O) was used and polyoxyethylene sorbitan monooleate (20E.O) was used instead of hydroxypropyl cellulose. The resulting cream is an O/W emulsion with non-thixotropic viscosity, and has excellent spreadability (spreadability) and smoothness (smoothness) during use.
The cream was also inferior to the cream of the present invention and gave a slightly sticky feeling to the skin. Similarly, the animal skin irritation score was 1.2, the human skin irritation score was (±) 2/25, and the sensitization was weak, and during the practical test conducted by 25 people, the number of people who answered that they felt irritation to the skin was 3.
There were 25 people. The cream of the present invention is superior to conventional nonionic creams in terms of irritation and safety. Further, the results of comparing the SD curves of the cream of the present invention and the cream of Comparison 1 are as follows, and good spreadability was experimentally confirmed.

[Table] Cream comparison 1 2800 2000 51300
Cream Example 8 (Skin Cream) A Formulation 1 Bentonite A ₁ 1.0 parts 2 Carrageenan 0.8 3 Methylbaraben 0.2 4 Stearic acid monoglyceride 2.0 5 Cetyl alcohol 3.0 6 Squirrel wax 5.0 7 Olive oil 13.0 8 Fragrance 0.3 9 Pure water 74.7 B Manufacturing Example A skin cream of the present invention was obtained by carrying out the procedure according to 8. The obtained cream is an O/W type emulsion having a thixotropic viscosity as shown in Figure 1 of the drawing, and its texture and gloss (gloss level is 90).
It was very stable and remained stable even after being left in a heated greenhouse at 45°C for 6 months. In addition, when used, it has excellent extensibility, extensibility (elongation), smoothness (smoothness), and thixotropic feel, and provides a refreshing feel without stickiness, as described in Comparative Example 1 below. Also, compared to the skin cream of Comparative Example 2, it was significantly superior in terms of spreadability, spreadability, and feel during use. Note that the results of comparison with Comparative Example 1 and Comparative Example 2 were detailed in Comparative Example 2. Comparative Example 1 (Skin Cream) The same procedure as in Example 8 was carried out except that sorbitan sesquistearate was used in place of bentonite _A1 . The obtained skin cream had a slightly sticky feeling, did not have the refreshing feeling of the present invention, and was inferior to the skin cream of the present invention in Example 8 in both feel and spreadability. The shear rate-stress curve diagram of this skin cream is shown in Figure 2 of the drawing. Comparative Example 2 (Skin Cream) Polyoxyethylene cetyl ether (EO = 5.5 mol) was used instead of bentonite A ₁ , and polyoxyethylene sorbitan monooleate (EO = 20 mol) was used instead of carrageenan. was carried out in the same manner as in Example 8 of the present invention. The obtained skin cream had less sticky feeling, but did not have the refreshing feeling of the present invention, and was inferior in feel and spreadability compared to the skin cream of the present invention. The shear rate-stress curve diagram of this skin cream is shown in Figure 2 of the drawing. As is clear from the SD curves in Figures 1, 2, and 3, the cream of the present invention (Figure 1) exhibits thixotropic viscosity, whereas the cream of Comparative Example 1 exhibits thixotropic viscosity. The creams of (Figure 2) and Comparative Example 2 (Figure 3) did not exhibit such viscosity;
They differ significantly in viscosity. The apparent viscosity at a shear rate of 400 sec ^-1 is
Figure) is smaller than Comparative Example 1 (Figure 2) and Comparative Example 2 (Figure 3), and it was confirmed that the skin cream of the present invention has better elongation during use.
In addition, there is a well-known and well-known literature in the field of the use characteristics and rheology (psychorheology) of cosmetics (Journal of Industrial Chemistry, Vol. 73, No. 4, 1970, pp. 774-780, "Rheological characteristics of cosmetic lipophilic creams"). According to the ``Sensory Test for Properties''), when taking the SD curve of cream from a psychorheological perspective, the yield value is generally correlated with the ``hardness'', and the shear rate (shear rate of 400 sec ^-1 It is said that there is a correlation between the apparent viscosity of the skin cream and the skin cream of the present invention (Example 8), Comparative Example 1, and Comparative Example 2 by 25 women (2 months). The results of the sensory test are as follows.

[Table] People who answered

[Table] Respondents Comparative Example 3 A comparative cleansing cream was prepared in the same manner as in Example 7, except that bentonite A ₁ was not used and 40.3 parts of water was used. The cleansing cream obtained was an O/W type emulsion with non-thixotropic viscosity, and its texture and gloss (gloss level was 55) were poor and hot. Furthermore, in a constant temperature room at 45°C, separation occurred after 5 days, and the stability over time (emulsion stability) was also poor. Furthermore, the extensibility and wearability (elongation) during use were poor. Comparative Example 4 A comparative cleansing cream was prepared in the same manner as in Example 7, except that hydroxypropyl cellulose was not used and 41.3 parts of water was used.
The resulting cleansing cream was an O/W emulsion with thixotropic viscosity, and its texture and gloss (gloss level was 60) were poor.
Separation occurred after two weeks in a constant temperature room at 45°C, and the stability over time (emulsion stability) was also poor. Comparative Example 5 A comparative skin cream was prepared in the same manner as in Example 8, except that carrageenan was not used and 75.5 parts of water was used. The obtained skin cream is an O/W type emulsion with thixotropic viscosity, and its texture, gloss (gloss level is 60),
The smoothness was poor. Furthermore, in a constant temperature room at 45°C, separation occurred after one week, and the stability over time (emulsion stability) was also poor. Comparative Example 6 A comparative skin cream was prepared in the same manner as in Example 8, except that bentonite A ₁ was not used and 75.7 parts of pure water was used. The resulting skin cream has a non-thixotropic viscosity.
It was a W-type emulsion, and its texture and gloss (gloss level was 55) were poor. Furthermore, in a constant temperature room at 45°C, separation occurred after 6 days, and the stability over time (emulsion stability) was poor. Furthermore, the extensibility and abrasion properties during use were poor. Example 9 Bentonite containing 160 mg equivalent/100 g of cation exchangeable sodium ions as clay
A skin milk of the present invention was prepared in the same manner as in Example 1, except that _A4 was used. The resulting skin milk has an extremely good feel and texture,
The viscosity was 600 cps, and the storage stability over time at 45°C remained stable even after 6 months.

[Brief explanation of the drawing]

Figure 1 is a shear rate-stress curve diagram of the skin cream of the present invention (Example 8), and Figure 2 is a diagram of comparative example 1.
Figure 3 is a shear rate-stress curve diagram of the skin cream of Comparative Example 2 (control).

Claims (1)

[Claims] 1 100mg of cation-exchangeable sodium ions
equivalent/100g to 160mg bentonite containing 0.05 to 1.9% by weight, xanthan gum,
A cream-like product containing 0.1 to 4.0% by weight of at least one water-soluble polymer selected from the group consisting of carrageenan and hydroxypropyl cellulose, 5 to 60% by weight of an oily substance, and 30 to 95% by weight of water. or emulsion-like skin cosmetics.