JPH0826356B2 - Clarifying agent for transparent soap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a clarifying agent for transparent soap, and more specifically, it is added to a soap composition in order to obtain a transparent soap having excellent transparency by a mechanical kneading method. It relates to a clarifying agent.

[Conventional technology]

Conventionally, as a method for producing transparent soap, there are roughly classified two methods, that is, a frame kneading method and a mechanical kneading method.

Of these, the method by the frame kneading method is almost solid in the formulation, and for example, fatty acid soap is used as a base, and a clarifying agent such as sugar, glycerin, sorbitol, propylene glycol or other polyols, and ethanol and water are heated. After mixing, pour into a frame to cool and solidify 2
~ Aged for 3 months, dried, stamped into a product.

As such a frame kneading method, for example, Japanese Patent Publication No. 36-70
No. 31, JP-B 45-18984, JP-B 47-7555, JP-B 4
The details are disclosed in various publications such as 8-42935 and Japanese Patent Publication No. 50-38642.

As an advantage of the transparent soap by the frame kneading method, it has excellent transparency, and since the crystal type is a so-called ω type and it is difficult to dissolve in water, it is difficult to impair the transparency during use, but the disadvantage is In addition to having a long production time and inferior production efficiency, it requires a wide space for aging and leaving.

On the other hand, in the mechanical kneading method, after adding a clarifying agent similar to that in the frame kneading method, a solvent is not used such as ethanol, and the crystal is refined by mechanical force to give transparency. However, it has the advantage that it is superior in production efficiency to the frame kneading method and that it does not need to be aged.

Such a mechanical kneading method is disclosed, for example, in JP-A-58-208399 as a mechanically devised method, and as a method in which a clarifying agent is devised. -181199 discloses a method using an alkanolamide, and JP-A-61-2800 discloses a method using triethanolamine lauryl sulfate.

[Problems to be solved by the invention]

However, although the mechanical kneading method has its own advantages as described above, it has a drawback that the transparent soap obtained is inferior in transparency to the frame kneading method, and this drawback is disclosed in the above publication. It is the current situation that the conventional technologies which are still unresolved and only these technologies which are translucent and have a low commercial value are obtained. In addition, the transparent soap obtained by the mechanical kneading method has a drawback that it swells and becomes cloudy during use because of its easy solubility in water due to the difference in crystal form, and this drawback is still unsolved.

Therefore, the present invention provides a clearing agent for obtaining a transparent soap having no such problems, excellent transparency, and swelling during use and not becoming cloudy by a mechanical kneading method. The purpose is to do.

[Means for solving problems]

The present inventors have conducted extensive studies to achieve the above-mentioned object, and as a result, when silicone oil is added to a soap base together with an ordinary clearing agent, the transparency of the resulting transparent soap is increased, and water is also added. The inventors have found that the problem is solved when the solubility in water is suppressed and the solution swells and becomes cloudy during use, and the present invention has been reached.

That is, the present invention relates to a transparentizing agent for transparent soap, which is characterized by containing silicone oil.

[Structure and operation of the invention]

As the silicone oil in the present invention, in addition to commonly used dimethyl silicone oil, in order to improve the dispersibility in a soap composition and the compatibility with a soap base, methylstyrene of the silicone oil, α-olefin, Polyether, alcohol, fluorine, amino, mercapto, epoxy, carboxyl, higher fatty acid, carnauba, amide modification and the like can be used. These are easily available as commercial products.

The present invention is characterized by using such a silicone oil as a clarifying agent, and the amount used is usually 1 to 6% by weight, preferably 1 to 4% by weight in the soap composition.
It is good to do. If the amount used is too small, the transparency will not be improved so much, and if it is too large, the foaming power of the soap will be impaired. However, if you want to create a mellow as a low-foam transparent soap with good defoaming,
A large amount of 6% by weight or more may be added. However, even in that case, if too much is added, the soap becomes so soft that it becomes difficult to knead it.

In the present invention, together with the above-mentioned silicone oil, a conventionally known conventional clarifying agent as described above, that is, one selected from sugars, glycerin, sorbitol, saccharide glycols such as propylene glycol or polyols, or the like. Use a mixture of two or more. These usual clarifying agents are generally used in the soap composition in an amount of 3 to
The amount used may be about 20% by weight.

Further, in the present invention, in order to uniformly disperse the silicone oil in the soap composition, an appropriate surfactant can be used if necessary. This surfactant includes, for example, Nishi Ichiro ed .: "Surfactant Handbook" (published by Sangyo Tosho Co., Ltd.) and Soft Giken Publishing: "Elucidation of functional action of new surfactants and development of applied products thereof. A wide variety of known anionic, nonionic, cationic and amphoteric surfactants, as described in "Practical Comprehensive Technical Data Book" (published by the Management Development Center), are widely included. However, the amount of these surfactants used should be such that the desired transparency of the present invention is not impaired.

In order to produce a transparent soap by a mechanical kneading method using such a clarifying agent or a surfactant and the above-mentioned surfactant, for example, after mixing each of the above components with a soap base, ethanol is added. A triple soap roll or plodder (screen) that allows a dried soap composition to be used as it is for the production of ordinary toilet soap without using a solvent such as
Alternatively, it may be applied to a special kneading machine or the like to finely crystallize the crystal by a mechanical force. With this, it has excellent transparency,
Moreover, it has a low solubility in water, and when it swells and becomes cloudy during conventional use, a transparent soap free from problems can be obtained.

As the soap base used here, beef tallow fatty acid sodium soap, coconut oil fatty acid sodium soap, hydrogenated castor oil fatty acid sodium soap, and the like, various animal and vegetable fatty acid sodium soaps conventionally known as a soap base. They may be used alone or in admixture of two or more, and if necessary, a part thereof may be potassium soap or lower amine soap.

The timing of adding the above-mentioned clarifying agent or the surfactant and the surfactant to the soap base is not particularly limited, and may be, for example, before or after the neutralization of the raw material fatty acid, in neat soap, or by kneading with a roll. It may be added during the process.

The dried soap composition contains the necessary amount of water in addition to the above-mentioned components, but other various known additives, such as chelating agents such as EDTA, humectants such as hyaluronic acid, fragrances, and dyes. Etc. may be included.

〔The invention's effect〕

As described above, by using the clarifying agent of the present invention, it is possible to obtain a transparent soap which is excellent in transparency, has low solubility in water, swells during use, and becomes cloudy without causing any trouble. .

〔Example〕

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

Example Next, as shown in Table 1, as a clarifying agent, glycerin, sugar, propylene glycol, and an average molecular weight of 20,000 were used.
Dimethyl silicone oil or its modified product is used together with an ordinary clarifying agent selected from PEG (polyethylene glycol) and sorbitol. Soap base, EDTA and water shown in the same table are used together with these. Ratio (total
The weight ratio of 100) is used to prepare the soap compositions of Sample Nos. 1 to 7 according to the present invention. For comparison, sample Nos. 8 to 10 prepared by mixing the same components as described above except that dimethyl silicone oil or a modified product thereof are mixed in the ratios shown in the table (shown by weight ratio of 100 as a whole). Was prepared.

These soap compositions were mechanically kneaded with a roll and a platter (scree) repeatedly, then taken out from the platter (cone) in the form of a bar, which was molded by a stamping machine to produce a solid soap. Using this solid soap, a transparency test and a swelling test in water are performed in the following manner,
The performance of the transparent soap was evaluated. The results are as shown in Table 1.

<Transparency test> A stamped bar of soap is cut to a thickness of 20 mm, and it is placed on a black cross with a width of 5 mm and a length of 15 mm drawn on a white paper.
Transparency was evaluated as ◯ when the 10 characters could be identified, Δ when the 10 characters could not be identified but showed that there were characters, and X when the characters could not be recognized at all.

<Swellability test in water> A piece of soap cut into a length of 10 mm, width of 20 mm, and height of 50 mm
It was immersed in water at 25 ° C. up to the position of 40 mm, left for 1 hour, pulled up from the water, lightly wiped the surface with filter paper, and then weighed quickly to determine the increase amount (mg) of water per 1 cm ^{2 of} the surface. The smaller this value, the lower the swelling property and the less likely it becomes cloudy in water.

As is clear from Table 1 above, the solid soaps of Sample Nos. 1 to 7 using the clarifying agent of the present invention have good transparency and low swelling property, but the transparency of the present invention is It can be seen that the solid soaps of Sample Nos. 8 to 10 which do not use the agent are inferior in these performances.

Claims (1)

[Claims] 1. A clarifying agent for transparent soap, which comprises a silicone oil.