JP5774951B2 - Transparent bar soap composition - Google Patents

Description

  The present invention relates to a transparent solid soap composition. In more detail, moist feeling after washing, transparency and foaming are good, and under storage conditions, it is difficult to whiten and good transparency can be maintained, the amount of soap reduced by drying is small, and under use conditions The present invention relates to a transparent solid soap composition containing glucopyranosyl glyceryl, which is less prone to white turbidity and can maintain good transparency, and has little reduction in the amount of soap due to changes in appearance such as stickiness, sweating and melting.

  A solid soap composition containing a fatty acid alkali salt, water, and a polyhydric alcohol such as glycerin or propylene glycol and / or a saccharide such as sucrose or sorbit as a clarifying agent is known. The soap composition mainly includes a step of preparing a soap base by adding water and a clarifying agent component to a fatty acid alkali salt and heating and stirring to dissolve and disperse the components. It is manufactured through a process of pouring into a predetermined frame mold, cooling solidification, frame removal, and cutting into a desired shape (frame kneading method). Moreover, since this soap composition has high transparency, it is referred to as a transparent solid soap composition (hereinafter, “transparent solid soap composition” may be simply referred to as “soap composition” for convenience).

  In general, a transparent soap composition that is commercially available contains about 15 to 27% by weight of water per 100% by weight of the soap composition from immediately after production to the time of shipment. When the water content of the soap composition is within this range, the soap composition maintains good transparency because the saccharide as a clarifying agent is dissolved in the water.

  However, the water content in the soap composition gradually decreases due to long-term storage or the like, and the saccharide as a clarifying agent may recrystallize. There was a problem that the surface of the soap composition was whitened by recrystallization of the saccharide, and transparency was deteriorated. Furthermore, if this water content continues to decrease, the recrystallization of saccharides accompanying the decrease in the water content will increase, so that the transparency will be further deteriorated, and in some cases, the soap composition will be damaged such as cracks. May occur.

  On the other hand, since the soap composition absorbs moisture under use conditions (when exposed to high humidity conditions), the cloudiness may occur and the transparency of the soap composition may deteriorate. Furthermore, this moisture absorption may cause changes in appearance such as stickiness, sweating, and melting. In particular, when manufactured by a frame kneading method, these problems are more likely to occur because the soap composition is exposed to high humidity conditions during the manufacturing process.

Thus, the conventional transparent soap composition has room for improvement in terms of maintaining transparency under storage conditions, maintaining transparency under use conditions, and reducing appearance changes.
In order to solve such problems, Patent Document 1 discloses a transparent solid soap composition containing a mixed salt of fatty acid sodium / potassium, a specific amphoteric surfactant, a nonionic surfactant, glycerin and a glycerin derivative. Is disclosed. This transparent solid soap composition can be improved in terms of maintaining transparency under storage conditions, but because the melting rate in water is too high, a significant change in appearance such as melting under use conditions occurs, The basic characteristics of the soap composition such as so-called reduced use feeling such as poor foaming properties are also deteriorated.

  In addition, the content of polyhydric alcohol and saccharide contained in a normal transparent soap composition is 20 to 35% by weight and 10 to 30% by weight, respectively, but maintenance of transparency under storage conditions (occurrence of whitening) In order to solve this problem, it is known to increase the ratio of the polyhydric alcohol content to the saccharide content in the soap composition. However, although such a soap composition maintains transparency under storage conditions, the content of polyhydric alcohol is remarkably large, and therefore, under use conditions, transparency decreases due to white turbidity, stickiness, sweating, etc. In addition, problems such as significant changes in appearance such as melting and collapse, and deterioration of foaming are caused.

  The transparent soap composition contains oil such as beef tallow, horse oil, coconut oil, castor oil, olive oil, palm oil, etc., and the transparency of the soap composition under storage conditions and usage conditions can be maintained to some extent. It has been known. However, due to the presence of oil, basic properties as a soap composition, such as foaming, are impaired. That is, such a transparent soap composition does not achieve both the transparency of the soap composition under storage conditions and use conditions and the basic characteristics as a soap composition.

  Thus, the conventional transparent soap composition maintains good transparency under storage conditions and usage conditions, small changes in appearance under conditions of use (stickiness, melting, sweating, etc.) and good There was still room for improvement because both foaming could not be achieved.

JP 2004-352997 A

  Therefore, the present inventor considered that whitening or the like caused by drying (reduction of water content in the soap composition) during long-term storage, stickiness due to moisture absorption under use conditions, sweating, or appearance change such as melting or clouding, In order to prevent the occurrence of odor, we investigated the ingredients that have both the characteristics of exhibiting sufficient transparency even when used with a small amount of sugar and the characteristics of low hygroscopicity. As a result, in the soap composition, the knowledge that conventional problems could be solved by using saccharides and glucopyranosylglycerol together was obtained.

  The present invention has been completed on the basis of this finding, has a moist feeling after washing, transparency and foaming well, and can be kept white and hardly transparent under storage conditions, and can be dried. A transparent solid soap composition that is less susceptible to clouding under use conditions, maintains good transparency under use conditions, and has less soap loss due to changes in appearance such as stickiness, sweating, and melting. The issue is to provide.

  The transparent solid soap composition of the present invention contains a fatty acid soap (A), a saccharide (B) as a clarifying agent, glucopyranosylglycerol (C) as an anti-turbidity agent, and water (D). It is characterized by that.

As a clarifying agent, in addition to the saccharide (B), an alcohol (E) (excluding glucopyranosylglycerol (C)) is preferably further contained.
It is preferable that content of the said glucopyranosyl glyceryl (C) is 0.1 to 25 weight% per 100 weight% of soap compositions.

  The content ratio ((B) / (C)) of the saccharide (B) and the glucopyranosyl glyceryl (C) is preferably 0.4 to 400.

  The transparent solid soap composition of the present invention has good moist feeling after washing, transparency and foaming, can be kept white and has good transparency under storage conditions, and the amount of soap reduced by drying is small. Under the conditions of use, it is difficult to become cloudy and can maintain good transparency, and the effect of reducing the amount of soap due to changes in appearance such as stickiness, sweating and melting can be exhibited.

FIG. 1A is a view showing a soap tray used when preparing a “soap composition under use conditions”. FIG.1 (b) is a figure which shows the soap tray in which the soap composition was mounted on the insole. FIG. 1C is a cross-sectional view taken along the broken line AA ′ in FIG. FIG.1 (d) is sectional drawing in broken line AA 'of FIG.1 (b), Comprising: A figure which shows the state with which the cover body, the midsole, and the lower bottom were assembled | attached. Fig.2 (a) is a figure which shows the solid soap composition used for the Example or the comparative example. FIG.2 (b)-(d) is a figure provided in order to demonstrate the procedure of the evaluation 4 using the solid soap composition used for the Example or the comparative example.

Hereinafter, the transparent solid soap composition of the present invention will be specifically described.
The transparent solid soap composition of the present invention comprises fatty acid soap (A), sugar (B) as a clarifying agent, glucopyranosylglycerol (C) as an anti-turbidity agent, water (D), and essential components. In order to improve various physical properties, other components may be included as necessary.

  Hereinafter, for the sake of convenience, the fatty acid soap (A), sugar (B), glucopyranosylglycerol (C), and water (D) are respectively referred to as component (A), component (B), and component (C). (Or GG) and (D) component, a transparent solid soap composition may be simply called a soap composition.

  The fatty acid soap (A) contained in the transparent solid soap composition of the present invention is a neutralization method in which fatty acids are neutralized with sodium hydroxide and potassium hydroxide, a saponification method in which fats and oils are saponified with sodium hydroxide and potassium hydroxide, It is a fatty acid sodium salt and / or a fatty acid potassium salt obtained by a known production method such as an ester saponification method in which a fatty acid methyl ester or a fatty acid ethyl ester is saponified with sodium hydroxide or potassium hydroxide.

  Although it does not specifically limit as a fatty acid used when manufacturing a fatty-acid soap (A), It is preferable that the carbon atom number of a fatty acid is 8-22, and it is more preferable that it is 2-18. The fatty acid may be a saturated fatty acid or an unsaturated fatty acid, and may be linear or branched.

  Specific fatty acids include fatty acids such as lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, ricinoleic acid, erucic acid, behenic acid, and beef tallow fatty acid. , Mixed fatty acids derived from animal fats such as pork fat fatty acid, horse oil fatty acid, sheep fat fatty acid, chicken fat fatty acid, coconut oil fatty acid, palm oil fatty acid, palm kernel oil fatty acid, soybean oil fatty acid, rapeseed oil fatty acid, olive oil fatty acid, Examples thereof include mixed fatty acids derived from vegetable oils and fats such as corn oil fatty acid, sunflower oil fatty acid, and castor oil fatty acid, and hydrogenated fatty acids thereof.

Moreover, these fatty acids may be used individually by 1 type, and may be used in combination of 2 or more types.
Examples of the alkali agent include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide. These alkali agents may be used alone or in combination of two or more. Sodium hydroxide is used as the alkali agent, and potassium hydroxide may be used in combination with sodium hydroxide as necessary.

The fatty acid soap (A) may be a fatty acid sodium salt alone, but preferably contains fatty acid potassium together with the fatty acid sodium.
The content of the fatty acid soap (A) is preferably 30 to 75% by weight, more preferably 35 to 60% by weight, and 40 to 50% by weight per 100% by weight of the soap composition. Further preferred.

  The saccharide (B) contained in the transparent solid soap composition of the present invention functions as a clarifying agent (sugar-based clarifying agent) that imparts transparency to the soap composition, and excludes glucopyranosylglycerol (C). If it is saccharides, it will not specifically limit.

  Examples of the sugar (B) include monosaccharides such as fructose, glycol, galactose, xylose, ribose, sorbose, sorbitol, mannitol, xylitol, erythritol, and sugar alcohols thereof, sucrose, maltose, lactose, maltotriose, raffinose. , Maltitol, lactitol, palatinose, etc. and their sugar alcohols, isomaltoligosaccharides, fructooligosaccharides, xylo-oligosaccharides, soybean oligosaccharides, coupling sugar (registered trademark), oligosaccharides such as neosugar (inulin) Sugar. These may be used alone or in combination of two or more. Among these, sucrose (sucrose) is preferable from the viewpoint that foaming of the transparent soap composition and stability of the generated soap foam are good (so that the soap foam is fine and difficult to collapse).

  The content of the saccharide (B) is preferably 10 to 40% by weight per 100% by weight of the soap composition. It is more preferably 20 to 40% by weight, and further preferably 20 to 30% by weight. When the content of the saccharide (B) is set in such a range, a product having excellent transparency can be produced.

  Moreover, the transparent solid soap composition of the present invention excludes alcohols (E) (glucopyranosylglycerol (C) in addition to the saccharide (B) as a clarifying agent (alcohol-based clarifying agent). .) Is preferably contained.

  The alcohol (E) is not particularly limited as long as it is an alcohol other than glucopyranosylglycerol (C). For example, polyols such as glycerin, propylene glycol, dipropylene glycol, and 1,3-butylene glycol ( Polyhydric alcohol), monohydric alcohols such as ethanol, and the like, and may be used singly or in combination. Among these, glycerin and ethanol are more preferable, and glycerin is more preferable from the viewpoint of low price, colorlessness, odorlessness, and high compatibility with other components.

  The content of the alcohol (E) is preferably 5 to 35% by weight, more preferably 10 to 30% by weight, and more preferably 20 to 30% by weight per 100% by weight of the soap composition. Further preferred.

  Further, the content ratio of the saccharide (B) and the alcohol (E) (weight of the component (B) / weight of the component (E)) is preferably 0.28 to 8.0, It is more preferably 0.67 to 4.0, and further preferably 0.67 to 1.5. When the content ratio between the saccharide (B) and the alcohol (E) is set in such a range, the transparency and foaming of the resulting transparent solid soap composition are improved.

The glucopyranosyl glycerol (C) contained in the transparent solid soap composition of the present invention functions as an anti-clouding agent that prevents the precipitation of saccharides as a clarifying agent.
Glucopyranosylglycerol (C) is obtained from (i) (2R) -1-O-α-D-glucopyranosylglycerol (the following chemical formula (1)), (2S) -1-O-α-D-. Α-D-glucopyranosylglycerol such as glucopyranosylglycerol (the following chemical formula (2)), 2-O-α-D-glucopyranosylglycerol (the following chemical formula (3)), (b) (2R) ) -1-O-β-D-glucopyranosylglycerol (the following chemical formula (4)), (2S) -1-O-β-D-glucopyranosylglycerol (the following chemical formula (5)), 2- Β-D-glucopyranosylglycerol such as O-β-D-glucopyranosylglycerol (the following chemical formula (6)) can be mentioned, and (c) the added sugar is one molecule of glucose. Not limited to two molecules of glucose Good. When the additional sugar is two molecules of glucose, the binding mode between glucose is α-1,4 bond, β-1,4 bond, α-1,6 bond, β-1,6 bond, and α-1 , 2 bonds and β-1, 2 bonds may be used. These derivatives are mentioned, and these can be used alone or in combination of two or more.

グルコピラノシルグリセロール（Ｃ）を得る方法としては、カビ類のα−グルコシダーゼまたはシクロマルトデキストリングルコシルトランスフェラーゼをグリセロール溶液中で糖類の基質に作用させる方法、清酒，味噌，みりん等の醸造物から抽出・精製する方法、イソマルトース，マルチトールなどを四酢酸鉛や過ヨウ素酸塩でグリコール開裂したものを還元する方法、Ｋｏｅｎｉｇｓ−Ｋｎｏｒｒ反応により合成したβ−グルコシドをアノメリゼーションした後、β−グルコシダーゼでβ−グルコシドを加水分解する方法、さらにグリセロール溶液中にグルコースと触媒を加えて加熱し、化学的にグリセロールに糖を付加する方法などが挙げられる。この中でも、低コストで効率良く得られるという観点から、グリセロール溶液中にグルコースと触媒を加えて加熱し、化学的にグリセロールに糖を付加する方法が特に好ましい。

As a method for obtaining glucopyranosylglycerol (C), a method in which fungal α-glucosidase or cyclomaltodextrin glucosyltransferase is allowed to act on a saccharide substrate in a glycerol solution, extraction from brewed products such as sake, miso, mirin, etc.・ Purification method, isomaltose, maltitol, etc., a method of reducing glycol-cleavage with lead tetraacetate or periodate, β-glucosidase synthesized after Koenigs-Knorr reaction and β-glucosidase And a method of hydrolyzing β-glucoside, and a method of adding sugar and a catalyst to a glycerol solution and heating to chemically add sugar to glycerol. Among these, from the viewpoint of being efficiently obtained at low cost, a method of adding glucose and a catalyst to a glycerol solution and heating it to chemically add sugar to glycerol is particularly preferable.

  The content of the component (C) is preferably 0.1 to 25% by weight, more preferably 1 to 20% by weight, and more preferably 2 to 10% by weight per 100% by weight of the soap composition. More preferably. When the content of the component (C) is set within such a range, a decrease in the soap composition during use can be reduced, and transparency under storage conditions and use conditions can be maintained well. .

  The content ratio of the component (B) to the component (C) (weight of component (B) / weight of component (C)) is preferably 0.1 to 400, preferably 0.1 to 40 More preferably, it is more preferably 0.1 to 25, and particularly preferably 2 to 15. When the content ratio of the component (B) and the component (C) is set within such a range, the reduction in the use of the transparent solid soap composition and the transparency can be favorably maintained.

  Although water (D) is contained in the transparent solid soap composition of the present invention, the content thereof is preferably 15 to 27% by weight, and 17 to 22% by weight when the soap composition is 100% by weight. It is more preferable that When the content of the component (D) is set in such a range, a transparent solid soap composition having good transparency can be obtained.

In the soap composition of the present invention, other components (F) other than the above-described components (A) to (E) may be appropriately blended within a range not impairing the object of the present invention.
As component (F), 1,3-butylene glycol, propylene glycol, pyrrolidone carboxylic acid, sodium pyrrolidone carboxylate, hyaluronic acid, sodium hyaluronate, polyoxyethylene alkyl glucoside ether, hydrolyzed collagen and other humectants, alkylamides Amphoteric surfactants such as propyl betaine and coconut oil fatty acid alkyl betaines, nonionic surfactants such as alkyl glucosides, fatty acid alkanolamides and polyglycerin fatty acid esters, anionic surfactants such as acylmethyl taurate, trimethyl alkyl ammonium chloride, etc. Bactericides such as cationic surfactants, triclosan, trichlorocarbanilide, hinokitiol, anti-inflammatory agents such as allantoin and dipotassium glycyrrhizinate, oils, fragrances, pigments, edet Salts and other chelating agents, UV absorbers, dipotassium glycyrrhizate, psyllium extract, perilla extract, savon grass extract, lecithin, saponin, aloe, plantain, chamomile and other water-soluble substances such as hydroxypropylmethylcellulose and hydroxyethylcellulose Usability improver such as polymer, lactic acid ester, sodium alkyl ether carboxylate, disodium alkyl sulfosuccinate, sodium alkyl isethionate, sodium polyoxyethylene alkyl sulfate, acylmethyl taurine, sodium acyl glutamate, sodium acyl sarcosinate, Examples thereof include foamability improvers such as sodium lauryl glycol acetate, anti-dandruff agents such as sodium chloride, and pH adjusters such as citric acid.

When the soap composition of the present invention contains the component (F), the content of the component (F) is appropriately adjusted, and is, for example, about 20 to 40% by weight per 100% by weight of the soap composition. .
In the transparent soap composition of the present invention, “transparent” means that the soap bar immediately after preparation is placed on a black mount and a color difference meter (standard: CR-300, manufacturer: Minolta Camera Co., Ltd.) is used. The L * value (brightness) in L ^* a ^* b ^* measured using is defined as having a value of 40 or less. The L value of the commercially available bar soap (Shiseido “The Bondol”) was 95.2.

  In addition, the “solid” in the transparent soap composition of the present invention uses a hardness meter (standard: aster rubber hardness meter type C) according to JIS K 7312 to determine the hardness of the solid soap composition immediately after preparation. The hardness value measured in this way is defined as 80 or more.

  There is no restriction | limiting in particular as a use of the transparent solid soap composition of this invention, For example, the object for whole body washing | cleaning, finger washing, face washing, shaving, etc. are mentioned. In particular, since the moist feeling after washing is good, the transparent solid soap composition of the present invention is preferably used for shaving.

The method for producing the soap composition of the present invention can be produced by a known production method, and for example, an ordinary frame kneading production method can be mentioned.
As an example of the frame kneading method, the fatty acid soap (A) is prepared by neutralizing a fatty acid with an alkaline aqueous solution, and the prepared fatty acid soap (A) is mixed with the components (B), (C), (D) Components, if necessary, (E) component, (F) component are added and these components are dissolved or dispersed while heating as necessary to prepare a soap composition in a molten state, The prepared soap composition is poured into a frame, cooled and solidified, cut as necessary, dried, and molded into a desired shape.

EXAMPLES Hereinafter, although this invention is demonstrated more concretely using an Example, this invention is not limited to these Examples.
[Example 1: Preparation and characterization of soap composition 1]
Mixed fatty acid (lauric acid: myristic acid: palmitic acid: stearic acid: isostearic acid: behenic acid (content ratio (weight ratio) 20: 35: 15: 20: 5: 5), saponification number 228.37) to 100 kg, 34 % Caustic soda solution (48.2 kg) (Caustic soda amount: 16.4 kg, water: 31.8 kg) was gradually added and stirred, and the solution was completely neutralized under conditions where the liquid temperature was 70-80 ° C. A soap base 1 was obtained.

  While maintaining the liquid temperature of the obtained soap base 1 at 65 to 75 ° C., 25 kg of white sugar and 10 kg of sorbit, 10 kg of water, three parts of hydroxyethylethylenediaminetriacetate are added to the soap base 1 as sugar (sugar-based clarifying agent). Stirring while adding 0.5 kg of sodium solution to dissolve them, and further mixing evenly while adding 10 kg of glucopyranosylglycerol (GG) to obtain a liquid soap composition Product 1 was obtained.

  This liquid soap composition 1 is poured into a mold (7.0 cm × 20 cm × 1.0 cm), cooled and solidified at room temperature (25 ° C.), then cut and dried, and further, a diameter of 6.4 cm × thickness. A disk-shaped solid soap composition 1 as shown by the number 10a in FIG. 1 (a) was prepared by forming into a 1 cm disk shape.

  The content of GG in the obtained soap composition 1 is 4.9% by weight per 100% by weight of the composition, and the weight ratio of sugar-based clarifying agent to GG (addition amount of sugar-based clarifying agent). / GG addition amount) is 3.5.

  Next, the properties of the solid soap composition 1 were evaluated on the basis of each evaluation method and criteria described below. The obtained evaluation results are shown in Table 1. In Table 1, the content of each component is shown in parts by weight.

[Example 2: Preparation and characterization of soap composition 2]
A soap composition 2 was prepared in the same manner as in Example 1 except that 50 kg of ethanol was added as an alcohol (alcohol clarifying agent) together with the mixed fatty acid, and various properties were evaluated. The obtained evaluation results are shown in Table 1. In addition, the content of GG in the soap composition 2 is 3.9% by weight per 100% by weight of the composition, and the weight ratio of sugar-based clarifying agent to GG (addition amount of sugar-based clarifying agent / The amount of GG added is 3.5.

[Example 3: Preparation and characterization of soap composition 3]
A soap composition 3 was prepared in the same manner as in Example 1 except that 50 kg of ethanol and 16 kg of glycerin were added as alcohol-based clarifying agents together with the mixed fatty acid, and the amount of GG added was changed from 10 kg to 26 kg. Characteristics were evaluated. The obtained evaluation results are shown in Table 1. In addition, the content of GG in the soap composition 3 is 9.1% by weight per 100% by weight of the composition, and the weight ratio of sugar-based clarifying agent to GG (addition amount of sugar-based clarifying agent / The amount of GG added is 1.3.

[Example 4: Preparation and characterization of soap composition 4]
Except having changed the addition amount of GG from 10 kg to 0.1 kg, the soap composition 4 was prepared similarly to Example 1, and various characteristics were evaluated. The obtained evaluation results are shown in Table 1. In addition, the content of GG in the soap composition 4 is 0.05% by weight per 100% by weight of the composition, and the weight ratio of sugar-based clarifying agent to GG (addition amount of sugar-based clarifying agent / The amount of GG added is 350.

[Example 5: Preparation and characterization of soap composition 5]
A soap composition 5 was prepared in the same manner as in Example 1 except that the amount of GG added was changed from 10 kg to 60 kg, and various characteristics were evaluated. The obtained evaluation results are shown in Table 1. In addition, the content of GG in the soap composition 5 is 23.7% by weight per 100% by weight of the composition, and the weight ratio of sugar-based clarifying agent to GG (addition amount of sugar-based clarifying agent / The amount of GG added is 0.58.

[Example 6: Preparation and characterization of soap composition 6]
A soap composition 6 was prepared in the same manner as in Example 1 except that the amount of GG added was changed from 10 kg to 20 kg, and various characteristics were evaluated. The obtained evaluation results are shown in Table 1. The content of GG in the soap composition 6 is 9.4% by weight per 100% by weight of the composition, and the weight ratio of sugar clarifying agent to GG (addition amount of sugar clarifying agent / GG Addition amount) is 1.75.

[Example 7: Preparation and characterization of soap composition 7]
A soap composition 7 was prepared in the same manner as in Example 1 except that the amount of GG added was changed from 10 kg to 40 kg, and various characteristics were evaluated. The obtained evaluation results are shown in Table 1. The content of GG in the soap composition 7 is 17.1% by weight per 100% by weight of the composition, and the weight ratio of sugar-based clarifying agent to GG (addition amount of sugar-based clarifying agent / The amount of GG added is 0.88.

[Comparative Example 1: Preparation and characteristic evaluation of soap composition 8]
A soap composition 8 was prepared in the same manner as in Example 1 except that GG was not added, and various characteristics were evaluated. The obtained evaluation results are shown in Table 1.

[Comparative Example 2: Preparation and characterization of soap composition 9]
A soap composition 9 was prepared in the same manner as in Example 3 except that GG was not added, and various characteristics were evaluated. The obtained evaluation results are shown in Table 1.

[Comparative Example 3: Preparation and characterization of soap composition 10]
A soap composition 10 was prepared in the same manner as in Example 3 except that GG and a sugar-based clarifying agent were not added, and various properties were evaluated. The obtained evaluation results are shown in Table 1.

[Comparative Example 4: Preparation and characterization of soap composition 11]
A soap composition 11 was prepared in the same manner as in Example 1 except that no sugar-based clarifying agent was added, and various properties were evaluated. The obtained evaluation results are shown in Table 1.

[Comparative Example 5: Preparation and characterization of soap composition 12]
A soap composition 12 was prepared in the same manner as in Example 3 except that no sugar-based clarifying agent was added, and various characteristics were evaluated. The obtained evaluation results are shown in Table 1.

[Comparative Example 6: Preparation and characterization of soap composition 13]
A soap composition 13 was prepared and various properties were evaluated in the same manner as in Example 1 except that the sugar-based clarifying agent and GG were not added. The obtained evaluation results are shown in Table 1.

[Evaluation methods and standards]
Hereinafter, the evaluation method of each characteristic of a soap composition is shown. Further, “soap composition (immediately after preparation)”, “soap composition (storage condition)”, and “soap composition (use condition)” used in the following evaluation are defined as follows.

[Treatment of each soap composition]
(I) "Soap composition immediately after preparation"
A soap composition having an elapsed time of less than 24 hours after preparation was defined as “a soap composition immediately after preparation”.

(Ii) "Soap composition under storage conditions"
A soap composition obtained by leaving the “prepared soap composition” in a thermostatic chamber (45 ° C., humidity 35% RH) for 3 months.

(Iii) "Soap composition under use conditions"
The following operation 1 was carried out twice a day in the morning and evening (once in the morning and once in the evening) per day, and the soap was stored by performing the following operation 2 except when the operation 1 was carried out. The soap composition obtained by continuing these operations 1 and 2 for 3 weeks was designated as “a soap composition under use conditions”.

“Operation 1”: Wet the soap composition with warm water of 40 ° C., wrap it with both hands, rub it on the palm about 20 times, foam, and then gently wash off the foam on the soap surface, and then drain the water easily “Operation 2”: As shown in FIG. 1 (a), on a middle bottom 11 of a soap tray 20 comprising a lid (not shown), a midsole 11 having an opening 12 for draining water, and a bottom bottom 13. The soap composition 15 that has undergone the “operation 1” is placed (FIGS. 1B and 1C), the insole 11 on which the soap composition is placed is placed on the lower bottom 13 and the lid 14 is placed inside. The soap composition was assembled to the bottom 11 and drained and stored so as not to be covered with water ((FIG. 1 (d)) (operation 2). FIGS. (C) to (d) These show sectional drawing in the broken-line AA 'part of FIG.

  In addition, the hardness of the soap compositions (the above (i) to (iii)) of each Example and Comparative Example was measured using a hardness meter (standard: aster rubber hardness meter type C) in accordance with JIS K 7312. As a result, the hardness value was 80 or more.

Evaluation 1 (moist feeling)
Fifteen people used the “soap composition immediately after preparation” in a normal face wash, and evaluated the skin condition (moist feeling) after the face wash according to the following criteria.
[Evaluation criteria]
A: Moist feeling is very high.
○: There is a moist feeling.
Δ: There is no moist feeling.

Evaluation 2 (foaming property)
An aqueous solution (100% by weight of the entire aqueous solution) containing 1% by weight of the “soap composition immediately after preparation” was prepared using 4 ° hard water prepared using MgCl ₂ . The prepared aqueous solution was filled in 5 g in a 200 mL measuring cylinder, shaken 50 times at 30 ° C., the height (mm) of the generated foam was measured, and the foam quality was evaluated according to the following criteria.
In addition, in the solid soap composition which shows evaluation of following (circle) and (double-circle), foam quality is favorable (foaming is favorable).

[Evaluation criteria]
A: The height of the foam is 25 mm or more.
○: The height of the foam is 20 mm or more and less than 25 mm.
(Triangle | delta): The height of a bubble is 15 mm or more and less than 20 mm.
X: The height of a bubble is less than 15 mm.

Evaluation 3 (Transparency)
The transparency of “soap composition (immediately after preparation)” and “soap composition (use conditions)” was evaluated by visual inspection based on the following criteria.

[Evaluation criteria]
A: Whitening is not seen at all, and it is transparent.
○: Some whitening is observed, but it is almost transparent.
(Triangle | delta): Whitening is seen and it is partially opaque.
X: Significant whitening is observed, and the whole is extremely opaque.

In addition, in the soap composition in which the evaluations “Δ” to “◎” were obtained, the soap composition was placed on a black mount and a color difference meter (standard: CR-300, manufacturer: Minolta Camera Co., Ltd.) The L * value (lightness) in L ^* a ^* b ^* measured using a company was 40 or less.

Evaluation 4 (Thickness of the cloudy layer of soap composition (use conditions) (mm))
Using the soap composition (immediately after preparation) (numbering 20a shown in FIG. 2), the soap composition (use condition) (shown in FIG. 2) under the conditions described in the above [treatment of each soap composition] Prepare numbering 20b). Next, as shown in FIGS. 2 (b) and 2 (c), the soap composition passes through the center 21 of the disc-shaped soap composition 20b and the line segment 22 has both end points 21 'on the circumference. The product 20b is cut to obtain two cut soap compositions 20b '. As shown in the figure (d), a soap composition 20b forming a white cloudy layer 23a (a layer made of a cloudy soap composition) and a transparent layer 23b (a layer made of a soap composition that is not cloudy). The cut surface 23 'is observed, and the thickness d (mm) of the cloudy layer 23a is measured.

Evaluation 5 (weight loss rate of soap composition (use conditions) (%))
Using a soap composition (immediately after preparation) (A ₀ (g)), a soap composition (under the conditions of use) was prepared under the conditions described in [Treatment of each soap composition]. The weight (A ₁ (g)) was measured, and the “weight loss rate (%) of soap composition under use conditions” was calculated by the following formula. In addition, it can be said that the smaller the weight loss of the soap composition in this case, the smaller the change in appearance such as stickiness, sweating and melting.

評価６（石鹸組成物（保存条件下）の減量率（％））
石鹸組成物（調製直後）（Ａ₀(g)）を用いて、上記［各石鹸組成物の処理］に記載の条件にて石鹸組成物（保存条件下）を調製し、該石鹸組成物の重量（Ａ₂）（ｇ）を測定して、以下の式により、「石鹸組成物（保存条件下）の減量率（％）」を算出した。なお、この場合の石鹸組成物の減量は、主に乾燥による水分の蒸発量に起因する。また、石鹸組成物中の水分量の減少（蒸発量の増大）は、石鹸組成物に白化が発生し、透明性を低下させることが言える。

Evaluation 6 (weight loss rate of soap composition (under storage conditions) (%))
A soap composition (under storage conditions) was prepared using the soap composition (immediately after preparation) (A ₀ (g)) under the conditions described in [Treatment of each soap composition] above. The weight (A ₂ ) (g) was measured, and the “weight loss rate (%) of soap composition (under storage conditions)” was calculated according to the following formula. In this case, the weight loss of the soap composition is mainly caused by the amount of water evaporated by drying. Moreover, it can be said that the decrease in the amount of water in the soap composition (increase in the amount of evaporation) causes whitening of the soap composition and decreases transparency.

  According to the present invention, moist feeling after washing, transparency and foaming are good, and under storage conditions, it is difficult to whiten and good transparency can be maintained, and the amount of soap reduced by drying is small. Can provide a transparent solid soap composition that is less susceptible to white turbidity and can maintain good transparency, and has little reduction in the amount of soap due to changes in appearance such as stickiness, sweating, and melting.

10: Soap tray (top view)
10 ′, 10 ″: soap tray (cross-sectional view taken along broken line AA ′ in FIG. 1B)
11: Insole 12: Opening part 13 for draining water 13: Lower base 14: Lid 15: Soap composition 20a after operation 1: Soap composition (just after preparation)
20b: soap composition (use conditions)
20b ': Cut soap composition (under conditions of use)
21: Center 21 ': Both end points 22: A line segment passing through the center of the disc-shaped soap composition and both end points are on the circumference 23: Cut surface 23a: Cloudy layer 23b: Transparent layer d: Thickness of the cloudy layer The

Claims (4)

  A transparent solid soap composition comprising a fatty acid soap (A), a saccharide (B) as a clarifier, glucopyranosylglycerol (C) as a cloudiness inhibitor, and water (D) .   The transparent solid soap composition according to claim 1, further comprising an alcohol (E) (excluding glucopyranosylglycerol (C)) in addition to the saccharide (B) as a clarifying agent. object.   The transparent solid soap composition according to claim 1 or 2, wherein the content of the glucopyranosyl glyceryl (C) is 0.1 to 25% by weight per 100% by weight of the soap composition. .   The content ratio ((B) / (C)) of the saccharide (B) and the glucopyranosyl glyceryl (C) is 0.1 to 25. The transparent solid soap composition as described in any one of Claims.

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