JPH0146485B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a cosmetic pack for use in skin care, and more particularly to a so-called mud-like cosmetic pack. Traditionally, face packs have been used as cosmetics to moisturize the dead skin cells in the skin and remove dirt from the skin's surface.These have been divided into mud packs, cream packs, and peel-off types in terms of shape. It is broadly divided into patsuku. Among these, the characteristics required for a muddy pack are: high safety, appropriate viscosity during use and ease of application, giving an appropriate feeling of tension to the skin, and drying in an appropriate amount of time. These include being easy to wash off, and having a moist and pleasant feel that lasts after use. In order to achieve these properties, we proposed a muddy pack containing bentonite as the main ingredient, ethyl alcohol added to speed up the drying speed, and titanium oxide added to cover up the unique bad color caused by bentonite. has been done. However, these conventional mud-type cosmetic packs tend to increase in viscosity during storage.
Frequently, syneresis occurred, resulting in a significant loss of commercial value. The present inventor conducted extensive research to obtain a mud-type cosmetic pack that does not have the above-mentioned drawbacks, and found that by incorporating sodium carboxymethylcellulose (hereinafter referred to as Na-CMC) with a specific degree of etherification, The inventors discovered that a good cosmetic pack could be obtained and completed the present invention. That is, the present invention uses bentonite, titanium oxide, ethyl alcohol, and a degree of etherification of 0.55 to 0.55.
The present invention provides a cosmetic pack agent characterized by containing Na-CMC of 0.75 or less. According to the present invention, bentonite, titanium oxide,
By blending Na-CMC with the specified degree of etherification as a stabilizer into a muddy pack whose main component is ethyl alcohol, it is an excellent cosmetic pack that does not have drawbacks such as increased viscosity or syneresis during storage. can be obtained. Na-CMC blended into the cosmetic pack of the present invention
The degree of etherification is 0.75 or less, preferably 0.55~
It is 0.75. The influence of the degree of etherification of Na-CMC on the properties of cosmetic packs is clearly different from that of other compositions such as toothpaste in which inorganic powders are dispersed. If you exceed
If left as it is, gelation will occur and the appearance of the paste will deteriorate. Next, Table 1 shows the influence of the degree of etherification of Na-CMC on the properties of the mud pack. Here, the formulation of the slurry pack was as follows, and it was manufactured by a conventional method. Ingredients Amount (wt%) Bentonite 10.0 Titanium oxide 3.5 Purified water 67.5 D-Panthenol 0.1 Citric acid 0.15 Sodium pyrrolidone carboxylate
0.50 Ethyl alcohol 10.0 Propylene glycol 8.0 Methylparaben 0.05 Na-CMC 0.2 The evaluation criteria are as follows. ○: Uniform and smooth surface. △: The surface is partially not smooth. ×: The surface is uneven and has no commercial value. Consistency: Rheometer NRM-20002J (manufactured by Food Kogyo Co., Ltd.), elevator rising speed 2cm/
min, adapter diameter 10mm disk

[Table] As is clear from Table 1, when Na-CMC with a higher degree of etherification is used, gelation occurs when left to stand, and the appearance of the paste becomes extremely poor. In addition, the amount of bentonite blended in the total weight of the cosmetic pack is 8 to 10%, preferably 9 to 10%.
%, and the content of Na-CMC is 0.05-0.3%,
Preferably it is 0.1-0.2%. Next, Table 2 shows the relationship between the blending amounts of bentonite and Na-CMC and the performance, safety, and stability of cosmetic packs. Here, the formulation of the slurry pack was as follows, and it was manufactured by a conventional method. Component Amount (wt%) Bentonite 5 ~ 15 Na-CMC 0.1 ~ 0.3 Titanium oxide 3.5 D-Panthenol 0.1 Citric acid 0.15 Sodium pyrrolidone carboxylate
0.50 Ethyl alcohol 10.0 Propylene glycol 8.0 Methyl paraben 0.05 Total remaining amount of purified water 100.0 In addition, the criteria for evaluating properties 〇, △, × are the same as above, and for the feeling of use, the results listed below out of 10 were expressed. Expressed as a percentage of people. For those who complained of pain during use, use was discontinued, so we were unable to obtain data on how the skin felt after use for the 12% and 15% bentonite formulations.

[Table] From Table 2, it can be seen that the blending amounts of bentonite and Na-CMC are preferably within the above range. The cosmetic pack of the present invention can be manufactured by conventional methods. During manufacturing, sodium pyrrolidone carboxylate, propylene glycol,
Moisturizing agents such as glycerin and other medicinal agents effective for the skin such as panthenol may also be blended. Next, the present invention will be explained in more detail based on examples. In addition, in the examples, all percentages are by weight.
It is. Examples 1 to 3 Cosmetic mud packs were produced in a conventional manner according to the formulations shown in Table 2 below.

【table】

[Table] All of the obtained mud-like cosmetic packs maintained favorable properties without gelation immediately after production and after one month at 40°C, and had a good feeling in use and on the skin after use. Summer.

Claims (1)

[Scope of Claims] 1. A cosmetic pack comprising bentonite, titanium oxide, ethyl alcohol, and sodium carboxymethylcellulose with a degree of etherification of 0.55 to 0.75. 2. The cosmetic pack according to item 1 above, wherein the amount of bentonite is 8 to 10% by weight based on the total composition. 3. The cosmetic pack according to item 1 or 2 above, wherein the amount of sodium carboxymethylcellulose is 0.05 to 0.3% by weight based on the entire composition.