KR100472212B1 - Transparent solid detergent composition - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a transparent solid detergent composition having improved usability, dissolution, and the like, wherein at least 3.5% of a fatty acid salt with a specific taurine counterion, fatty acid sodium salt and / or fatty acid potassium salt, or moisturizing agent is used. And a transparent solid detergent composition characterized by blending water.

Description

Transparent solid detergent composition {TRANSPARENT SOLID DETERGENT COMPOSITION}

The present invention relates to improvements in transparent solid detergent compositions, in particular their fatty acid counterion compositions.

The transparent solid detergent composition is particularly widely used in high-quality face washes and the like because the transparent solid detergent composition has a high-quality image and can exhibit a deep color tone and metallic feeling even when an appropriate amount of dyes and pigments are added.

Conventionally, as a component of a transparent solid detergent composition, what added glycerol, sucrose, etc. as a transparent agent to base materials, such as fatty acid soap, was mainstream.

As the fatty acid soap as a base material, an alkali metal soap using sodium, potassium or the like as a counter ion of a fatty acid is mainly used.

While these fatty acid alkali metal soaps are inexpensive, they have the advantages of good foaming and soft foam quality, but they have a drawback that they are slightly larger and melt away after use. In addition, in consideration of the pulling feeling after use, soaps based on weak bases and fatty acids such as triethanolamine and lysine have also been used. However, sufficient improvement has not been achieved.

This invention is made | formed in view of the subject of the said prior art, The objective is to provide the transparent solid detergent composition by which the usability, melt | dissolution, etc. were improved.

In order to achieve the above object, the present inventors earnestly examined, and by using the N-methyl taurine alkali metal salt, taurine alkali metal salt, and hypotaurine alkali metal salt of fatty acid, they do not lose transparency and do not have a feeling of pulling. The present invention has been found to be an excellent transparent solid detergent composition such as the present invention.

That is, the transparent solid detergent composition according to the present invention comprises at least 3.5% of one or more fatty acid salts selected from the group consisting of compounds represented by the following Chemical Formulas 1 to 3,

R-COO ^- H ₂ N ⁺ (CH ₃ ) -CH ₂ -CH ₂ -SO ₃ ^- X ⁺

R-COO ^- H ₃ N ⁺ -CH ₂ -CH ₂ -SO ₃ ^- X ⁺

R-COO ^- H ₃ N ⁺ -CH ₂ -CH ₂ -SO ₂ ^- X ⁺

(In Formulas 1 to 3, R is a saturated or unsaturated hydrocarbon group having 7 to 23 carbon atoms, and X is an alkali metal or an organic alkali.)

Fatty acid sodium salts and / or fatty acid potassium salts,

Humectants, and

It is characterized by blending water.

Moreover, in the composition which concerns on this invention, the counterion of a fatty acid is a counter ion of Formula 1-3 in molar ratio: 5-50

Sodium: 40 ~ 95

Potassium: 0-20

Is appropriate.

Moreover, in the composition concerning this invention, it is suitable that the sum total of a fatty acid salt is 35 to 55 weight%, a moisturizer is 15 to 35 weight%, and water is 15 to 25 weight%.

Moreover, the composition which concerns on this invention WHEREIN: The polyether moisturizer which add-polymerized 2-100 mol of propylene oxide and 50 mol or less of propylene oxide to the polyhydric alcohol nucleus which has three or more hydroxyl groups in a molecule | numerator is 5-50 with respect to the moisturizer whole quantity. It is suitable to contain by weight%.

Moreover, in the composition of this invention, it is suitable that it is a transparent solid detergent composition matched to the mold which poured the fatty acid salt of a hot melt state, a moisturizer, and water into a mold, and cooled and solidified.

In addition, in this invention, "transparent solid detergent composition" means what is substantially transparent in the state remove | eliminated color agents, such as dye and a pigment.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described.

In the present invention, R of Chemical Formulas 1 to 3 is a saturated or unsaturated hydrocarbon group having 7 to 23 carbon atoms, and specific examples thereof include heptyl, octyl, nonyl, decyl, undecyl, dodecyl and tri Branch type, such as linear saturated hydrocarbon groups, 2-methylheptadecyl group, 2-ethylpentyl group, such as a decyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, an octadecyl group, and a tetra-acyl group; Branched unsaturated hydrocarbon groups, such as a linear-type unsaturated hydrocarbon group, such as a saturated hydrocarbon group, an 8-heptadecenyl group, an oleyl group, a 4, 6- octadecadienyl group, and a 2-methyloctadeca-6-enyl group, etc. are mentioned. Can be.

In the above formulas (1), (2) and (3), X is an organic alkali such as alkali metals such as sodium, potassium and lithium, triethanolamine, diethanolamine and lysine.

In addition, in this invention, R of fatty acid R-COO <^-> of fatty acid sodium salt or fatty acid potassium salt is common with the definition of fatty acid R of the said General formula (1)-(3).

And it is suitable to use the same thing for the fatty acid of Formula 1-3, fatty acid sodium, and fatty acid potassium.

Moreover, in this invention, it is especially suitable to neutralize the heat-melted fatty acid by adding the alkali agent which contains a fatty acid and a substantially equivalent taurine type | mold counterpart, sodium ion, and potassium ion as a counter ion.

Moreover, as a moisturizer suitably used in this invention, saccharoids, such as sucrose, sorbitol, glycerin, 1, 3- butylene glycol, propylene glycol, dipropylene glycol, or polyol are illustrated. In particular, in the present invention, as a suitable moisturizer, a polyether compound obtained by addition-polymerizing 2 to 100 moles of propylene oxide and 50 moles or less of ethylene oxide to a polyalcohol nucleus having three or more hydroxyl groups in a molecule is suitably used. The polyether moisturizer is preferably blended 5 to 50% by weight based on the total moisturizer amount. Examples of the polyhydric alcohol nucleus at this time include glycerin, diglycerin, pentaerythritol, dipentaerythritol, and various monosaccharides, disaccharides, oligosaccharides, and the like as illustrated below.

Examples of the disaccharides include trehalose, saccharose, maltose, lactose and the like. Examples of the polysaccharides include gentianose, raffinose, meretitose, starchiose, cellulose, hemicellulose, starch, chitin glycogen, and the like. Examples of the sugar alcohols include D-sorbitol, D-mannose, D-mannite, and the like. Examples of the sugar carboxylic acid include D-mannonic acid, D-gluconic acid, aldonic acid and uronic acid. Examples of carbohydrate derivatives are inosite, α-acrose, glucosone, methylfractopyranoside, sorbitan, ethylglucoranoside, gluconolactone, arbutin, monoacetylsorbitol, diacetyl sorbitan, sorbitan laurate ester , Sorbitan oleic acid ester, gluconic acid ester, etc. are illustrated.

Moreover, the transparent solid detergent composition which concerns on this invention is soap, alkyl sulfate ester (salt), polyoxyethylene alkyl ether sulfate (salt), and hydroxyalkyl ether which are normally contained in a cleaning composition in addition to the said essential component as needed. Anionic surfactants such as carboxylic acids (salts), amphoteric surfactants such as imidazoline-based amphoteric surfactants and betaine-type amphoteric surfactants, polyoxyethylene alkyl ethers, polyoxyethylene fatty acid esters, sucrose fatty acid esters, and alkylglycosides. , Nonionic surfactants such as Martitol hydroxy fatty acid ethers, cationic surfactants such as trimethylalkylammonium chloride, plant extract ingredients such as bitter grass, peony, iris and horsetail, pharmaceuticals such as tranexamic acid and arbutin, fragrances and preservatives Components, such as these, can be mix | blended suitably.

Moreover, it is suitable that the transparent solid detergent composition which concerns on this invention is manufactured as shown in FIG.

That is, the lower alcohols, such as various fatty acids, ethyl alcohol, are heated and melted at 40-60 degreeC, and the alkali which becomes a counter ion is added, and neutralization is performed. Moisturizing agents, such as sugars and polyols, other additives, and chemical | medical agents are added to this, and it melt | dissolves uniformly, and a fragrance | flavor and a pigment are added as needed, this liquid is poured into a mold, and it cools and solidifies. Thereafter, the mold is taken out and cut as necessary to allow dry aging for 40 to 60 days. Wipe and dry this as necessary, dry the surface, form and wipe the top.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described.

Assessment Methods

Moreover, in the following test examples, evaluation was performed as follows.

High Mars

○: when the solidification state

(Triangle | delta): When it is solidified overall, but is soft

X: When the solidification state as a whole cannot be obtained

Transparency

Each sample was cut uniformly to a thickness of 20 mm, placed on 26 points of type, and it was determined whether or not it could be read.

(Double-circle): It can read reliably.

(Circle): It can read.

(Triangle | delta): It can read to some extent.

X: Unable to read.

Uniformity

(Circle): It is uniform in a transparent state as a whole.

(Triangle | delta): It is totally transparent but some nonuniformity.

X: A crystal precipitates as a whole.

Bubble

A female panel (20 persons, 20-40 years old) evaluated the operation by carrying out the test solid soap by hand in the sun of normal face-wash and foaming it with tap water.

◎: very good

○: good foaming

△: foaming normal

×: Poor foaming

Pulling feeling after face-wash

A female panel (20 people, 20 to 40 years old), who took the test solid soap with the sun in the usual face of face washing, foamed it with tap water, and washed it.

◎: no pulling feeling, very good

○: no pulling feeling is good

△: normal

X: There is a feeling of pulling

Melt away

It was set as the evaluation which melt | dissolves the friction solubility according to JISK-3304.

That is, a sample piece (cross section 15 mm x 20 mm) of constant weight is placed on the film surface wetted with tap water prepared at 40 ° C, and the film is rotated to frictionally dissolve for 10 minutes. And the friction solubility per fixed area was calculated | required from the weight before and behind friction melting.

◎: 20 or less

○: 20-35

△: 35-50

×: 50 or more

Pair Ion Review of Fatty Acids

First, the present inventors performed various evaluations by preparing a transparent solid detergent composition using sodium, sodium N-methyl taurate, sodium N- taurate, and sodium hypotaurate as counterions of mixed fatty acids. The results are shown in Table 1 below.

Specifically, the salt of mixed fatty acid (Uji fatty acid / palm oil fatty acid = 8/2) was mix | blended in the ratio of the following table, and it was set as the fatty acid salt, respectively.

The cleaning composition was obtained by using the mixed component of 40% by weight of this fatty acid salt, 10% by weight of sorbitol, 5% by weight of glycerin, 10% by weight of sugar, 15% by weight of ethanol and 20% by weight of ion-exchanged water by the frame method. That is, the raw material is heated to 70-80 ° C., uniformly dissolved, and then injected into the mold. Thereafter, the resultant was cooled and solidified and dried to obtain a solid detergent composition.

In addition, a counterion was represented by the molar ratio in fatty acid and equivalent alkali, unless there is particular notice below.

Test Example 1 Test Example 2 Test Example 3 Test Example 4 salt 100 80 80 80 N-methyltaurine Na - 20 - - N-taurine Na - - 20 - Hippourin Na - - - 20 High Mars ○ ○ ○ ○ Transparency ◎ ◎ ◎ ◎ Uniformity ○ ○ ○ ○ Bubble △ ○ ○ ○ Pulling feeling after face-wash × ◎ ◎ ◎ Melted away ○ ◎ ◎ ◎

Compared to the case where only sodium was paired to the same fatty acid in Table 1, when taurine-based ions of N-methyl taurine sodium, N-taurine sodium, and N-hypotaurine sodium were added, foaming and pulling feeling after washing Significant improvement was recognized in that it melted away.

Molar ratio of taurine paired ions

The present inventors also conducted a study on a suitable counterion ratio (molar ratio) of sodium N-methyltaurine. In addition, the test method is based on the example of the said Table 1.

Test Example 5 6 7 8 9 10 11 12 salt 99 95 90 80 70 60 50 40 N-methyltaurine Na One 5 10 20 30 40 50 60 High Mars ○ ○ ○ ○ ○ ○ ○ ○ Transparency ◎ ◎ ◎ ◎ ◎ ◎ ◎ △ Uniformity ○ ○ ○ ○ ○ ○ ○ × Bubble ○ ○ ○ ○ ○ ○ ○ - Pulling feeling after face-wash × ○ ○ ◎ ◎ ◎ ◎ - Melted away ○ ○ ○ ◎ ◎ ◎ ◎ -

In Table 2, the molar ratio of N-methyltaurine as a counter ion is recognized as an effect of 5 or more. When the present inventors examined further as N-methyltaurine sodium fatty acid, it turned out that the addition effect is recognized by presence of 3.5 weight% or more in a composition.

Potassium ion addition effect

In general, the addition of potassium ions tends to promote softening while improving cleaning power and foaming. Therefore, the present inventors examined the effect of adding potassium ions under various compounding amounts of N-methyltaurine.

In addition, according to the examination method, counterion was shown by molar ratio.

Test Example 13 14 15 16 17 18 19 20 salt 90 85 80 70 60 50 40 30 potassium 10 10 10 10 10 10 10 10 N-methyltaurine Na 0 5 10 20 30 40 50 60 High Mars ○ ○ ○ ○ ○ ○ ○ × Transparency ◎ ◎ ◎ ◎ ◎ ◎ ○ - Uniformity ○ ○ ○ ○ ○ ○ ○ - Bubble ○ ○ ○ ○ ○ ○ ○ - Pulling feeling after face-wash × ○ ○ ◎ ◎ ◎ ◎ - Melted away △ ○ ○ ◎ ◎ ◎ ◎ -

Test Example 21 22 23 24 25 26 27 salt 80 75 70 60 50 40 30 potassium 20 20 20 20 20 20 20 N-methyltaurine Na 0 5 10 20 30 40 50 High Mars ○ ○ ○ ○ ○ ○ × Transparency ◎ ◎ ◎ ◎ ◎ ◎ - Uniformity ○ ○ ○ ○ ○ ○ - Bubble ◎ ◎ ◎ ◎ ◎ ◎ - Pulling feeling after face-wash × ○ ○ ◎ ◎ ◎ - Melt away △ ○ ○ ◎ ◎ ○ -

Test Example 28 29 30 31 32 33 34 salt 70 60 50 40 60 50 40 potassium 30 30 30 30 40 40 40 N-methyltaurine Na 0 10 20 30 0 10 20 High Mars ○ ○ ○ × ○ × × Transparency ◎ × × × × × × Uniformity ○ × × × × × × Bubble ◎ - - - - - - Pulling feeling after face-wash × - - - - - - Melt away × - - - - - -

In Tables 3 to 5, potassium may improve foaming at a molar ratio of 20 or less, but if it exceeds 20, it is difficult to solidify, and it may be understood that harmfulness occurs even in uniformity.

Fatty Acid Blending Amount

Next, the present inventors examined the compounding quantity in the composition of a fatty acid salt.

That is, the fatty acid salt part and remainder were prepared as follows, and this was mixed in a suitable ratio and the composition was obtained.

Fatty Acid Part

Salts of mixed fatty acids (C ₁₄ / C ₁₆ / C ₁₈ / isoC ₁₈ = 60/20/10/10) were combined to make fatty acid sodium / potassium fatty acid / fatty acid N-methyltaurine = 70/10/20.

Balance

The remainder was composed of 10 parts of sorbitol, 5 parts of glycerin, 10 parts of sugar, 15 parts of ethanol and 20 parts of ion-exchanged water.

The above fatty acid moiety and the remainder are heated to 40 to 60 ° C. at a ratio shown in Table 6 to be uniformly dissolved, and then injected into the mold and cooled. The solidified matter was dried and aged to obtain a solid detergent composition.

Test Example 35 36 37 38 39 40 41 Fatty Acid Part 30 35 40 45 50 55 60 High Mars × ○ ○ ○ ○ ○ ○ Uniformity - ○ ○ ○ ○ ○ ×

From the result of Table 6, the blending amount of fatty acid salt in the composition is preferably 35 to 55% by weight.

Review of moisturizer amount

Next, the present inventors examined the amount of moisturizers in the composition.

In addition, the test was performed as follows. That is, ethanol was added to the mixed fatty acid (C ₁₄ / C ₁₆ / C ₁₈ / isoC ₁₈ = 60/20/10/10), which was heated to about 60 ° C. in a reaction kettle, and sodium hydroxide / sodium N-methyltaurine To the ratio of the following table and neutralized to obtain a fatty acid soap component. The fatty acid soap component and the moisturizer were further dissolved in 10% by weight of ethanol and 20% by weight of ion-exchanged water at a ratio shown in the table below to obtain a cleaning composition by a frame method. The results are shown in Tables 7 to 10 below.

Test Example 42 43 44 45 46 Na / N-methyltaurine Na 95/5 Soap 25 35 45 55 60 Total Moisturizer 45 35 25 15 10 High Mars △ ○ ○ ○ Cannot be manufactured Transparency ◎ ◎ ◎ ◎ - Uniformity ○ ○ ○ ○ - Bubble ○ ○ ○ ○ - Pulling after face wash ○ ○ ○ ○ - Melted away △ ○ ○ ○ -

Test Example 47 48 49 50 51 Na / N-methyltaurine Na 75/25 Soap 25 35 45 55 60 Total Moisturizer 45 35 25 15 10 High Mars × ○ ○ ○ ○ Transparency - ◎ ◎ ◎ △ Uniformity - ○ ○ ○ △ Bubble - ○ ○ ○ ○ Pulling after face wash - ◎ ◎ ○ ○ Melted away - ○ ◎ ◎ ○

Test Example 52 53 54 55 56 Na / N-methyltaurine Na 50/50 Soap 25 35 45 55 60 Total Moisturizer 45 35 25 15 10 High Mars × ○ ○ ○ ○ Transparency - ◎ ◎ ○ △ Uniformity - ○ ○ ○ △ Bubble - ○ ◎ ◎ ○ Pulling after face wash - ◎ ◎ ◎ ○ Melted away - ◎ ◎ ◎ ◎

Test Example 57 58 59 60 61 Na / N-methyltaurine Na 40/60 Soap 25 35 45 55 60 Total Moisturizer 45 35 25 15 10 High Mars × △ ○ ○ ○ Transparency - △ × × × Uniformity - △ × × × Bubble - △ ○ ○ ○ Pulling after face wash - ◎ ◎ ◎ ○ Melted away - ○ ◎ ◎ ◎

As can be seen from Tables 7 to 10, when the ratio of N-methyltaurine in the counterion is increased, the transparency may be slightly lowered, but the transparency can be improved by adding an appropriate amount of the humectant. Especially the compounding quantity of a moisturizer is 15-35 weight% in a composition, and improvement is confirmed also from the point of pulling, melt | dissolution, etc. with transparency.

Effect of Adding Polyether Moisturizer

Ethanol was added to a mixed fatty acid (C ₁₄ / C ₁₆ / C ₁₈ / isoC ₁₈ = 60/20/10/10), which was heated to about 60 ° C. in a reaction kettle, and sodium hydroxide / potassium hydroxide / N-methyltaurine It neutralized at the ratio of sodium = 80/10/10, and obtained the fatty acid soap component.

40 weight% of this fatty acid soap component, 25 weight% of humectants of the ratio (weight ratio) of the following table, 15 weight% of ethanol, and 20 weight% of ion-exchange water are mixed, it is heated to 40-60 degreeC, and it melt | dissolves uniformly, Inject to cool. The solidified matter was dried and aged to obtain a solid detergent composition.

Test Example 62 63 64 65 Sorbitol 40 40 40 40 glycerin 20 15 10 0 Sugar 40 40 40 40 POP (9) diglyceryl ether 0 5 10 50 High Mars ○ ○ ○ ○ Uniformity ○ ○ ○ ○ Foaming ○ ○ ○ ○ Pulling after face wash ○ ○ ◎ ◎ Melted away ○ ○ ◎ ◎

As can be seen from Table 11, the polyether-based moisturizer improves the feeling of pulling, melting, and also has an excellent effect compared to other moisturizing ingredients.

Types of Taurine Pair Ions

Next, the present inventors examined the kind of said Formula (1)-(3).

That is, ethanol was added to the mixed fatty acid (C ₁₄ / C ₁₆ / C ₁₈ / isoC ₁₈ = 60/20/10/10), and it was heated to about 60 ° C. in a reaction kettle, and sodium hydroxide / potassium hydroxide / Taurine pair ions were added and neutralized at a ratio of 70/10/20 to obtain fatty acid soap components.

The cleaning composition was prepared by the same framing method using a mixed component of 40% by weight of the fatty acid soap component, 10% by weight of sorbitol, 5% by weight of glycerin, 10% by weight of sugar, 15% by weight of ethanol and 20% by weight of ion-exchanged water. Got it.

Test Example Pair High Mars Uniformity Bubble Pulling feeling Melted away 66 N-methyltaurine Na ○ ○ ○ ◎ ◎ 67 N-Methyltaurine K ○ ○ ○ ◎ ◎ 68 N-taurine Na ○ ○ ○ ◎ ◎ 69 N-taurine K ○ ○ ○ ◎ ◎ 70 N-Hiptaurin Na ○ ○ ○ ◎ ◎ 71 N-Hiptaurin K ○ ○ ○ ◎ ◎ 72 N-methyltaurinetriethanolamine ○ ○ ○ ◎ ◎

It is understood from the results in Table 12 that the alkali metal of the taurine counterion is not particularly limited.

(Example)

Hereinafter, the suitable compounding example of this invention is demonstrated. All formulation examples were also manufactured according to the conventional method.

Moreover, all had excellent transparency, solvent resistance, and usability.

(Formulation Example 1)

Lauric acid 7.0% by weight

Myristic acid 10.0

Palmitic acid 3.0

Stearic acid 6.0

Isostearic acid 1.5

Sorbitol 7.5

Alcohol 15.0

Editate 0.1

Sodium Hydroxide 1.1

N-Methyltaurine Sodium 9.2

Sodium Hydroxyalkyl Ether Carbonate 3.0

Salt 0.5

Sugar 10.0

POP (9) diglyceryl ether 5.0

BHT 0.1

Pigment amount

Ion-exchange water balance

(Combination Example 2)

Lauric acid 5.0 wt%

Myristic acid 10.0

Palmitic acid 3.0

Stearic Acid 5.0

Isostearic acid 3.0

Glycerin 10.0

Diglycerin 3.5

Sorbitol 4.0

Alcohol 10.0

Editate 0.1

Sodium Hydroxide 3.6

N-methyltaurine sodium 3.5

Sodium Hydroxyalkyl Ether Carbonate 2.0

POE (60) Cured Castor Oil 2.0

Lauroylimidazoliniumbetaine 2.0

Salt 0.5

Sugar 10.0

BHT 0.1

Pigment amount

Ion-exchange water balance

(Combination Example 3)

Lauric acid 8.0% by weight

Myristic acid 12.0

Palmitic acid 4.0

Stearic acid 6.0

Oleic acid 4.0

Sorbitol 11.0

Glycerin 5.0

Alcohol 16.5

Editate 0.1

Sodium Hydroxide 4.2

N-methyltaurine 5.5

Salt 0.5

Sugar 11.0

BHT 0.1

Titanium Oxide 0.1

Pigment amount

Ion-exchange water balance

(Combination Example 4)

Lauric acid 7.0% by weight

Myristic acid 10.0

Palmitic acid 3.0

Stearic acid 6.0

Isostearic acid 1.5

Sorbitol 7.5

Alcohol 15.0

Editate 0.1

Sodium Hydroxide 6.0

N-taurine potassium 2.1

Sodium Hydroxyalkyl Ether Carbonate 3.0

Salt 0.5

Sugar 10.0

POP (9) diglyceryl ether 0.1

Pigment amount

Ion-exchange water balance

As described above, according to the transparent solid detergent composition according to the present invention, by using a specific taurine-based alkali agent as a counterion of fatty acids, excellent transparency, solvent resistance, and feeling after washing are obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the suitable manufacturing process of the transparent solid detergent composition which concerns on this invention.

Claims (5)

3.5 to 54.9% by weight of one or two or more fatty acid salts selected from the group consisting of compounds represented by Formulas 1 to 3 (Formula 1) R-COO ^- H ₂ N ⁺ (CH ₃ ) -CH ₂ -CH ₂ -SO ₃ ^- X ⁺ (Formula 2) R-COO ^- H ₃ N ⁺ -CH ₂ -CH ₂ -SO ₃ ^- X ⁺ (Formula 3) R-COO ^- H ₃ N ⁺ -CH ₂ -CH ₂ -SO ₂ ^- X ⁺ (In formulas (1) to (3), R is a saturated or unsaturated hydrocarbon group having 7 to 23 carbon atoms, and X is an alkali metal or an organic alkali.) One or two or more fatty acid alkali metal salts selected from the group consisting of fatty acid sodium salts and fatty acid potassium salts,  Humectants, and  Water is combined; The counterions of the fatty acids R-COO ^- are present in a molar ratio of counterions: sodium: potassium of the general formulas 1 to 3 of 5 to 50:40 to 95: 0 to 20;  The total solid fatty acid salt is 35 to 55% by weight, the moisturizing agent is 15 to 35% by weight, water is 15 to 25% by weight, the transparent solid detergent composition. The method of claim 1, Containing 5 to 50% by weight of a polyether moisturizer obtained by addition polymerization of 2 to 100 moles of propylene oxide and 0 to 50 moles of ethylene oxide to the polyhydric alcohol core having 3 to 10 hydroxyl groups in the molecule. The transparent solid detergent composition characterized by the above-mentioned. The method according to claim 1 or 2, A transparent solid detergent composition, comprising pouring a fatty acid salt, a humectant, and water in a hot melt state into a mold, cooling, and solidifying the mold. delete delete