JP2000008098A - Solid soap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a solid soap having good detergency for oil spot or the like and suppressed stiff feeling and capable of exerting good feeling when used and useful as a clear soap or the like by including a polyoxyethylene-added glyceroester of fatty acid. SOLUTION: This solid soap is a clear soap or the like mainly composed of a sodium soap or a triethanolamine soap of a fatty acid and includes a polyoxyethylene-added glyceroester of fatty acid (e.g. 5-20 mol polyoxyethylene- added glyceroester of fatty acid derived from coconut oil). The soap contains 0.1-20 wt.% related compound and, if necessary, an ultraviolet light absorbent, a reductant and a chelating agent at 0.01-20 wt.%, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid soap suitable for transparent soap and the like.

[0002]

2. Description of the Related Art Bar soap has been used as a cleaning agent since ancient times. This is because the raw material is animal or vegetable oil, which can be easily produced and has excellent detergency. Various improvements have been made to such soaps in history. That is, there can be exemplified, for example, improvement in transparency and improvement in tension after use by addition of saccharides and the like, and improvement in creamy use feeling by addition of higher alcohol. Among these improvements, particular emphasis has been placed on the balance between cleanability in use feeling and reduction of irritations such as a feeling of tension caused by excessive cleaning. However, the addition of the higher alcohol
There is a problem that higher alcohols may cause irritation, and there is a problem that the addition of saccharides does not greatly contribute to the improvement of such a feeling of use. Means for improvement were sought. In the case of solid transparent soap, in addition to these conditions,
The solution was even more challenging, as it was also required to be transparent.

[0003] On the other hand, polyoxyethylene-added glycerin fatty acid esters are widely used as nonionic surfactants in the field of cosmetics and the like, but there is no example in which this is contained in bar soap. It was not known at all that it was possible to provide an excellent feeling of use by incorporating the product into a solid soap.

[0004]

SUMMARY OF THE INVENTION The present invention has been made under such circumstances, and it is an object of the present invention to provide means for improving a feeling of use, such as a feeling of tension, in a solid soap.

[0005]

In view of such a situation, the present inventors have conducted intensive studies for a means of improving the feeling of use such as a feeling of tension in a solid soap, and as a result, have found that polyoxyethylene-added glycerin fatty acid has been obtained. The inventors have found that such properties can be obtained by incorporating an ester into a soap bar, and have completed the invention. Hereinafter, the present invention will be described in detail focusing on embodiments.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION (1) Polyoxyethylene-added glycerin coconut oil fatty acid ester which is an essential component of the solid soap of the present invention is polyoxyethylene-added glycerin coconut oil fatty acid ester which is an essential component of the solid soap of the present invention. Polyoxyethylene is an ester of glycerin-derived fatty acid derived from coconut oil. Here, the preferred number of moles of polyoxyethylene is 5 to 20, more preferably 5 to 1.
0. Such polyoxyethylene-added glycerin coconut oil fatty acid esters are already commercially available, and these can also be used. Among the commercially available products, Hiber Oil HE (manufactured by Koyo Fine Chemical Co., Ltd.) and Cetiol (manufactured by Henkel Co., Ltd.), which have a polyoxyethylene addition number of 7, are suitable for the bar soap of the present invention. In this, Hiber Oil HE
Is particularly preferred. This is because the purity is extremely high. The preferred content of the polyoxyethylene-added glycerin coconut oil fatty acid ester in the solid soap of the present invention is 0.1 to 20% by weight, more preferably 1 to 1% by weight.
0% by weight. This is because if the amount is too small, the effect of improving the sense of tension may not be exhibited, and if the amount is too large, the stability and appearance of the bar may be impaired.

(2) Bar Soap of the Present Invention The bar of the present invention is characterized by containing a polyoxyethylene-added glycerin coconut oil fatty acid ester.
By adopting such an embodiment, the bar soap of the present invention has excellent detergency, suppresses the tension after washing, and has an excellent feeling of use.
In particular, the solid soap of the present invention is distinguished by its excellent detergency in removing oily stains such as lip colors which have been difficult to remove with conventional soaps. This is due to a side effect of the polyoxyethylene-added glycerin palm oil fatty acid ester.

The solid soap of the present invention can be applied without any particular limitation as long as it is a generally known solid soap. The solid soap containing fatty acid sodium soap or triethanolamine soap as a main component, as well as acylated soaps, can be used. It can also be applied to soaps containing sodium glutamate as a main component. Further, the present invention can be applied to ordinary opaque solid soap and transparent solid soap. Among these solid soaps, a particularly preferred one is a transparent solid soap, and it is particularly preferable to apply the present invention to a transparent solid soap containing fatty acid sodium soap and / or triethanolamine soap as a main component. This is because, in such a soap, since transparency is important, a component for reducing the tension and the like without impairing the transparency is required.

In the bar of the present invention, in addition to the polyoxyethylene-added glycerin coconut oil fatty acid ester and the soap, which are essential components, optional components usually used in bar soaps are added as long as the effects of the present invention are not impaired. And can be contained. Such optional components include, for example, hydrocarbons such as petrolatum and microcrystalline wax, esters such as jojoba oil and gay wax, triglycerides such as tallow, olive oil, higher alcohols such as cetanol and oleyl alcohol, and stearic acid. Fatty acids such as oleic acid, polyhydric alcohols such as glycerin and 1,3-butanediol, nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, ethanol, carbopol, etc. Examples include a thickener, a preservative, an ultraviolet absorber, an antioxidant, a chelating agent, a reducing agent, a pigment, and powders. Of these, particularly preferred are an ultraviolet absorber such as isooctyl cinnamate, a reducing agent such as sodium sulfite, and a chelating agent such as hydroxyethanephosphonic acid. This is because the transparency can be maintained for a long time by these additions. The preferred content of each of these components is 0.01 to 0.5% by weight. This is because if the amount is too small, the effect of maintaining transparency may be impaired, and if the amount is too large, the effect may level off or an undesired effect on other components of the bar may be exhibited.

[0010]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but it goes without saying that the present invention is not limited only to these Examples.

Example 1 A solid soap was prepared according to the following recipe. That is, b) and b) are heated to 80 ° C. to dissolve, b) is added to b), saponified, kneaded well, cooled, hot rolled, and then pelletized through a pelletizer. After that, it was poured into a frame and molded to obtain a transparent soap. A Lauric acid 12 parts by weight Myristic acid 8 parts by weight Palmitic acid 6 parts by weight Stearic acid 20 parts by weight BHT 0.4 parts by weight Sodium sulfite 0.1 part by weight Hydroxyethanediphosphonic acid 0.1 parts by weight Isooctyl cinnamate 0.2 Parts by weight Hiber Oil HE 5 parts by weight b Triethanolamine 33.5 parts by weight Sodium hydroxide 4.1 parts by weight Water 10.6 parts by weight

Example 2 The usability of the bar soap of Example 1 was tested. That is, the evaluation of the lack of tension in washing the soap, the ease of removing oil stains with a lip color, and the ease of removing water stains with a water-based ink were carried out by a specialized paneler.
The lip color was uniformly applied to the inner part of the upper arm, the sample was rubbed three times, then rubbed with fingers five times, rinsed with running water for 5 minutes, and evaluated by the remaining amount. Evaluation criteria are
++: no residual, +: slight residual was observed but no problem, ±: residual was observed,-: considerable residual was observed. Evaluation was similarly performed using an aqueous ink (dye type). The feeling of use was evaluated based on the following criteria: ++: no feeling of tension at the time of washing, +: slight feeling of tension, ±: slight feeling of tension,-: slight feeling of tension did. In addition, as Comparative Example 1,
Comparative Example 2 in which hiber oil HE was replaced with sucrose
In Table 3, Comparative Example 3 used a polyoxyethylene (2) oleate, and Comparative Example 4 used polyoxyethylene (20) oleate. In addition, the control example was obtained by simply removing the hiber oil HE. Table 1 shows the results. From this table, it can be seen that the solid soap of the present invention is excellent in use feeling and detergency. Incidentally, Comparative Examples 2 to 4 had impaired transparency.

[0013]

[Table 1]

Example 3 A solid soap was prepared according to the following recipe. That is, b) and b) are heated to 80 ° C. to dissolve, b) is added to b), saponified, kneaded well, cooled, hot rolled, and then pelletized through a pelletizer. After that, it was poured into a frame and molded to obtain a transparent soap. A Lauric acid 12 parts by weight Myristic acid 8 parts by weight Palmitic acid 6 parts by weight Stearic acid 20 parts by weight BHT 0.4 parts by weight Sodium sulfite 0.1 part by weight Hydroxyethanediphosphonic acid 0.1 parts by weight Isooctyl cinnamate 0.2 Parts by weight Hiber oil HE 0.1 parts by weight b triethanolamine 33.5 parts by weight sodium hydroxide 4.1 parts by weight water 10.6 parts by weight sucrose 4.9 parts by weight

Example 4 A solid soap was prepared according to the following recipe. That is, b) and b) are heated to 80 ° C. to dissolve, b) is added to b), saponified, kneaded well, cooled, hot rolled, and then pelletized through a pelletizer. After that, it was poured into a frame and molded to obtain a transparent soap. A Lauric acid 12 parts by weight Myristic acid 8 parts by weight Palmitic acid 6 parts by weight Stearic acid 20 parts by weight BHT 0.4 parts by weight Sodium sulfite 0.1 part by weight Hydroxyethanediphosphonic acid 0.1 parts by weight Isooctyl cinnamate 0.2 Parts by weight Hiber oil HE 1 part by weight b triethanolamine 33.5 parts by weight 4.1 parts by weight of sodium hydroxide 10.6 parts by weight of water 4 parts by weight of sucrose

<Example 5> The solid soaps of Examples 3 and 4 were examined for their usability and detergency in the same manner as in Example 2. Table 2 shows the results. From this, Hiber Oil HE
Is preferably 0.1 to 20% by weight, more preferably 1 to 10% by weight.

[0017]

[Table 2]

Example 6 A solid soap was prepared according to the following recipe. That is, b) and b) are heated to 80 ° C. to dissolve, b) is added to b), saponified, kneaded well, cooled, hot rolled, and then pelletized through a pelletizer. After that, it was poured into a frame and molded to obtain a transparent soap. This product was excellent in feeling of use and also excellent in cleanability. A Palm oil fatty acid 9 parts by weight Hydrogenated coconut oil fatty acid 23 parts by weight Behenic acid 1 part by weight Isostearic acid 5 parts by weight Hiber oil HE 1 part by weight b Sodium hydroxide 6.5 parts by weight Ethanol 18 parts by weight Sucrose 10 parts by weight Sorbitol 70 % Aqueous solution 4 parts by weight Ethylenediamine 0.4 parts by weight BHT 0.1 parts by weight Glycerin 5 parts by weight

Example 7 A solid soap was prepared according to the following recipe. That is, b) and b) are heated to 80 ° C. to dissolve, b) is added to b), saponified, kneaded well, cooled, hot rolled, and then pelletized through a pelletizer. After that, it was poured into a frame and molded to obtain a transparent soap. This product was excellent in feeling of use and also excellent in cleanability. A Palm oil fatty acid 9 parts by weight Hydrogenated coconut oil fatty acid 23 parts by weight Behenic acid 1 part by weight Isooctanoic acid 5 parts by weight Hiber oil HE 1 part by weight b Sodium hydroxide 6.5 parts by weight Ethanol 18 parts by weight Sucrose 10 parts by weight Sorbitol 70 % Aqueous solution 4 parts by weight Ethylenediamine 0.4 parts by weight BHT 0.1 parts by weight Glycerin 5 parts by weight

Example 9 A solid soap was prepared according to the following recipe. That is, b) and b) are heated to 80 ° C. to dissolve, b) is added to b), saponified, kneaded well, cooled, hot rolled, and then pelletized through a pelletizer. After that, it was poured into a frame and molded to obtain a transparent soap. This product was excellent in feeling of use and also excellent in cleanability. A Palm oil fatty acid 9 parts by weight Hydrogenated coconut oil fatty acid 23 parts by weight Behenic acid 1 part by weight Isopalmitic acid 5 parts by weight Hiber oil HE 1 part by weight b Sodium hydroxide 6.5 parts by weight Ethanol 18 parts by weight Sucrose 10 parts by weight sorbitol 70% aqueous solution 4 parts by weight Ethylenediamine 0.4 parts by weight BHT 0.1 parts by weight Glycerin 5 parts by weight

[0021]

According to the present invention, it is possible to provide a means for improving a feeling of use such as a feeling of tension in a solid soap.

Claims (3)

[Claims] 1. A solid soap containing a polyoxyethylene-added glycerin fatty acid ester. 2. The solid soap according to claim 1, which is a transparent soap. 3. The solid soap according to claim 1, further comprising triethanolamine soap.