JPH0826353B2 - 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.

Therefore, an object of the present invention is to provide a clarifying agent for obtaining a transparent soap having excellent transparency and free from such problems by a mechanical kneading method.

[Means for solving problems]

The present inventors, as a result of intensive studies to achieve the above objects, found that the addition of a specific polymerizing substance together with an ordinary clearing agent to the soap base significantly improves the transparency, The present invention has been reached.

That is, the present invention provides the following general formula: X-CR = CH ₂ (wherein X is a phenyl group or a sulfonated phenyl group,
R is a hydrogen atom or a methyl group), one or more polymers of the styrene compounds represented by the formula (1), a copolymer of the above styrene compound and another vinyl compound, or a polymer or copolymer thereof. The present invention relates to a transparentizing agent for transparent soap, which comprises a salt of a polymer having a sulfone group in its molecule.

[Structure and operation of the invention]

Examples of the compound represented by the above general formula in the present invention include styrene, α-methylstyrene, and styrenesulfonic acid. In the present invention, one or more of such styrenic compounds are used to obtain a polymer (homopolymer or copolymer) of the styrenic compound or the styrene compound and another vinyl compound. To obtain a copolymer of

Examples of the vinyl compound include ethylene, propylene, 2-methyl-1-butene, 1-hexene, isobutylene, diisobutylene, 1-dodecene, isopropyl vinyl ether, butyl vinyl ether, isopropenyl methyl ether, α-olefin, butadiene,
Examples include isoprene, neoprene, acrylonitrile and the like. These polymers or copolymers can be easily obtained by a known method such as a solution polymerization method using an appropriate polymerization initiator or an emulsion polymerization method. Its average molecular weight is usually in the range of 1,000 to 500,000, preferably 1,00.
It should be in the range of 0 to 100,000.

Further, in the present invention, among these polymers or copolymers, salts of those having a sulfone group in the molecule, for example, salts of polymers or copolymers obtained by using styrene sulfonic acid or the like as the styrene compound. Good. Examples of this salt include sodium salt, potassium salt, ammonium salt, and lower amine salt.

The above-mentioned salt may be used as a salt by using a predetermined alkali after obtaining a polymer or a copolymer, and styrene sulfonic acid or the like before the polymer or the copolymer is obtained as a salt in advance, It can also be obtained by a method of polymerizing or copolymerizing this. That is, the point of forming the salt may be either before or after the polymerization.

In the present invention, a polymer (homopolymer or copolymer) of the styrene compound as described above, a copolymer of the styrene compound and another vinyl compound, or a salt of these having a sulfone group in the molecule (Hereinafter, these are collectively referred to as a styrene-based polymer material) is used as a clarifying agent.

Specific examples of the styrene polymer used in the present invention include polystyrene, polystyrene sulfonic acid or its sodium salt, styrene and α-
Copolymer of methyl styrene, copolymer of styrene and styrene sulfonic acid or its potassium salt, copolymer of styrene and butadiene, copolymer of styrene and butadiene and acrylonitrile, styrene sulfonic acid and ethylene Examples thereof include copolymers or sodium salts thereof, and copolymers of α-methylstyrene and isobutylene.

In the present invention, the amount of such a styrene-based polymer used is usually 1 to 15% by weight, preferably 3% by weight in the soap composition.
It is recommended to be up to 10% by weight. If the amount used is too small, the transparency does not improve so much, and if it is too large, the foamability of the soap is impaired, so both are not preferable.

In the present invention, together with the above-mentioned styrene polymer, it is usually selected from the conventionally known conventional clarifying agents as described above, that is, sugars, glycerin, sorbitol, saccharides such as propylene glycol, or polyols. Use one or 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 styrene-based polymer substance 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. It should be noted that the amount of the surfactant 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. This gives a transparent soap with excellent transparency.

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 point of time when the above-mentioned clarifying agent or the surfactant and the surfactant are added to this soap base is not particularly limited, and may be before or after the neutralization of the raw material fatty acid or in neat soap after the neutralization, 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 surely overcome the problem of poor transparency, which has been regarded as a drawback of the conventional mechanical kneading method, and it is possible to obtain extremely excellent commercial value for transparency. High transparent soap can be produced.

〔Example〕

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

EXAMPLES Next, the symbol A obtained by the known polymerization method shown in Table 1 is used.
~ G styrene polymer is used as a clarifying agent of the present invention, glycerin, sugar, propylene glycol, PEG (polyethylene glycol) having an average molecular weight of 20,000.
Ordinary clarifying agent selected from sorbitol and soap base listed in Table 2 and EDTA and water.
The soap compositions of Sample Nos. 1 to 7 according to the present invention were prepared by mixing at the ratios shown in the table (shown by the weight ratio of 100 as a whole).

For comparison, Sample Nos. 8 to 10 prepared by mixing the same components as described above, except that the styrene-based polymer material was excluded, were mixed in the proportions shown in Table 2 (shown in a weight ratio of 100 as a whole). A soap composition 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 was conducted in the following manner to evaluate the performance as a transparent soap. The results are as shown in Table 2.

<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.

As is clear from Table 2 above, the solid soaps of Samples Nos. 1 to 7 using the clarifying agent of the present invention have good transparency, but are samples not using the clarifying agent of the present invention. It can be seen that the solid soaps of Nos. 8 to 10 have poor transparency.

Claims (2)

[Claims] 1. The following general formula: X-CR = CH ₂ (wherein X is a phenyl group or a sulfonated phenyl group,
R is a hydrogen atom or a methyl group), one or more polymers of the styrene compounds represented by the formula (1), a copolymer of the above styrene compound and another vinyl compound, or a polymer or copolymer thereof. A clearing agent for transparent soap, characterized by containing a salt of a polymer having a sulfone group in the molecule. 2. The average molecular weight of the polymer or copolymer is 1,00.
The transparentizing agent for transparent soap according to claim (1), which is in the range of 0 to 500,000.