JP5703699B2 - Solid soap composition - Google Patents

Description

  The present invention relates to a solid soap composition, more particularly, good foaming properties, creamy foam quality, no unpleasant feeling after use, excellent moist feel, defects in appearance such as cracks and stickiness It is related with the solid soap composition which is hard to produce and exhibits bright yellow.

  Conventionally, soap, which is a fatty acid salt, has been used as a skin cleanser for the face and body. This is because soap is easy to manufacture, has excellent foaming properties, and a refreshing wash is preferred. Among them, solid soap is widely used as the most common skin cleanser. However, some people with sensitive skin may feel the refreshing feeling peculiar to soap as a refreshing feeling.

  Many attempts have been made to improve such a feeling of washing and to provide a moist feel. For example, a method of adding wormwood extract, fish-derived collagen and marine minerals such as magnesium chloride to a soap base (see Patent Document 1), licorice extract, kujin extract, yokuinin extract, ceramide and corroded mudstone A method (see Patent Document 2) and the like for adding to a soap base has been studied.

  Moreover, in order to improve the touch at the time of use, making foam quality creamy has been examined. As a technique for making the foam quality creamy, for example, a method of adding Moso bamboo extract and trehalose to a fatty acid salt (see Patent Document 3) is known.

  Furthermore, it has been studied to give a distinctive feature to the appearance of solid soap and to differentiate it from other products, and as one of them, coloring using a dye has been attempted. There are natural dyes and synthetic dyes, but natural dyes tend to be preferred. Conventionally, carotene, paprika pigment, gardenia pigment, and the like have been used as natural pigments, but soaps colored with these pigments have had the problem that dullness and color unevenness occur, resulting in poor colorability. In order to solve such problems, a discoloration inhibitor containing rosmarinic acid as an active ingredient (see Patent Document 4) and a discoloration inhibitor containing an extract of a celery family plant as an active ingredient (see Patent Document 5) are disclosed. ing.

  However, even in the above-mentioned soap composition in which the feeling of use, foam quality, and colorability are improved, there are cases where the feeling of use and foam quality are improved, and coloring due to coloring may not be sufficient, and when solid soap is prepared There was a possibility that defects in appearance such as cracks and stickiness when a transparent solid soap was prepared would occur.

JP 2003-321346 A JP 2007-308673 A JP 2009-256535 A JP 2001-275611 A JP 2004-01180 A

  Therefore, the object of the present invention is that the foaming property is good, the creamy foam quality is excellent, the moist feeling is not felt after use, it is moist and the appearance is not likely to cause defects such as cracks and stickiness, and it is vivid. It is to provide a solid soap composition that exhibits a yellow color.

In order to solve the above-mentioned problems, the present inventors have intensively studied, and as a result, combined the above-mentioned purpose by combining turmeric (Curcuma Longa) rhizome extract, saturated fatty acid alkali metal salt, specific polyhydric alcohol and water in a specific ratio. The present invention was completed based on this finding. That is, the present invention is a solid soap composition comprising the following (a), (b), (c), and (d).
(A) Turmeric (Curcuma Longa) rhizome extract 0.0001-5 mass%,
(B) 30 to 99% by mass of a saturated fatty acid alkali metal salt,
(C) at least one polyhydric alcohol selected from glycerin, sucrose, sorbitol, glycosyl trehalose, 0.1 to 50% by mass,
(D) Water

  According to the present invention, the foaming property is good, the creamy foam quality is excellent, it has no unpleasant feeling after use, has a moist feel, is less likely to cause defects in appearance such as cracks and stickiness, and has a bright yellow color. Can be obtained.

It is a schematic diagram of the crack evaluation test in solid soap.

  Embodiments of the present invention will be described below. The solid soap composition of the present invention comprises (a) curcuma longa rhizome extract, (b) saturated fatty acid alkali metal salt, (c) glycerin, sucrose, sorbitol, glycosyl trehalose. A monohydric alcohol, and (d) water. First, (a) turmeric rhizome extract will be described.

[(A) Turmeric rhizome extract]
The cowberry used for the component (a) in the present invention is a plant belonging to the genus Turmeric, and the scientific name is Zingiberaceae Curcuma, and is generally called turmeric or autumn turmeric. It is a perennial plant used for spices and dyes, likes high temperature and high humidity, is widely cultivated in India and Southeast Asia, especially in the tropics and subtropics. In Japan, it is cultivated in warm places in Southwestern Japan such as Okinawa. The leaves are pointed oval, have a long handle, gather from the rhizomes, and have a height of 40-100 cm. In Japan, flower stems grow about 20 to 40 cm in height in early autumn, with flower spikes first. In the flower spikes, the cocoon leaves overlap like scales, and many yellow flowers bloom in it. The rhizome is thick and ginger-shaped, has a diameter of 3 to 4 cm, has a ring-shaped node on the surface, and the flesh is bright brown. Divide the rhizomes to breed.

  The main components of turmeric (Curcuma Longa) are curcumin, essential oil components turmerone, cineole and camphor. Turmeric (Curcuma Longa) contains more useful ingredients such as curcumin than other Curcuma plants such as spring turmeric (Curcuma aromatica), purple turmeric (Curcuma zedoaria), etc. A high effect is obtained in coloring. Curcumin is classified as a curcuminoid, a type of polyphenol, and is known as an antioxidant, and has been reported to have health benefits such as liver function enhancement. It has long been used as a yellow colorant in curry and takuan. Yes. Turmerone has a bisaborane-type sesquiterpene skeleton and has also been reported to promote bile secretion. Cineol is a kind of monoterpenoid having a cyclic ether structure, and is known to be contained in laurier, rosemary and the like, and has a gastric and antiseptic action in addition to a bile secretion promoting action. Camphor, also known as camphor, is a kind of monoterpenoid, the main component of camphor tree essential oil, and has blood circulation promoting action and cardiotonic action.

  The turmeric rhizome extract of component (a) used in the present invention can be usually prepared from the turmeric rhizome with various solvents as follows. First, a turmeric rhizome extract is obtained by slicing or pulverizing a turmeric rhizome, followed by drying or extraction by heating or refluxing or immersion in water, an organic solvent or a mixture thereof. Examples of the organic solvent include water-soluble alcohols such as methanol, ethanol and isopropanol, water-soluble polyhydric alcohols such as glycerin, propylene glycol, 1,3-butylene glycol and dipropylene glycol, and acetone. Preferred as the extraction solvent is one or more of ethanol, isopropanol, glycerin, propylene glycol, 1,3-butylene glycol, and water, and more preferably 1 of glycerin, 1,3-butylene glycol, and water. Species or two or more.

  The obtained extract may be used as it is, or may be concentrated by distilling off the solvent, or may be purified by treatment such as column chromatography or solvent fractionation. A dry powder (dry residue) can be obtained from the extract thus obtained by drying by a known method that is usually performed.

[(B) Saturated fatty acid alkali metal salt]
The saturated fatty acid alkali metal salt of the component (b) used in the present invention is obtained by reacting a saturated fatty acid with a basic compound containing an alkali metal. The fatty acid constituting the saturated fatty acid alkali metal salt is, for example, a linear or branched saturated fatty acid having 8 to 22 carbon atoms, specifically caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, Isostearic acid, hydroxystearic acid, etc. are mentioned. In addition to blending these simple fatty acids, mixed saturated fatty acids such as extremely hardened oil and hardened fatty acid (for example, beef tallow, coconut oil, palm oil, palm kernel oil, olive oil, corn Oil, sunflower oil, rapeseed oil, canola oil, soybean oil, castor oil, hardened oil or hardened fatty acid obtained by curing these oils alone or in combination), methyl ester or ethyl ester of saturated fatty acid can do.

  Furthermore, in consideration of further improvement in foaming property, foam quality and the like, the saturated fatty acid constituting the (b) saturated fatty acid alkali metal salt is 10 to 40% by mass, preferably 15 to 40% by mass, myristin. 30 to 70% by weight of acid, preferably 35 to 70% by weight, 5 to 25% by weight of palmitic acid, preferably 5 to 23% by weight, 0 to 30% by weight of stearic acid, preferably 0 to 20% by weight, and The total amount of lauric acid, myristic acid, palmitic acid and stearic acid is preferably 100% by mass.

  In addition, as the basic compound to be reacted with the saturated fatty acid, one or more of alkali metal hydroxides and carbonates are used. From the viewpoint of foaming and foam quality, sodium hydroxide, potassium hydroxide and the like which are alkali metal hydroxides are preferably used. From the viewpoint of solubility, sodium hydroxide and potassium hydroxide are used in combination, and the mass ratio (sodium / potassium) of these basic compounds is preferably 99/1 to 50/50.

[(C) polyhydric alcohol]
The component (c) used in the present invention is one or more polyhydric alcohols selected from glycerin, sucrose, sorbitol, and glycosyl trehalose. When preparing a transparent solid soap, it is preferable to use two or more of these polyhydric alcohols in combination.

[Content of each component]
As for the content of each component in the solid soap composition of the present invention, the component (a) is 0.0001 to 5% by mass, the component (b) is 30 to 99% by mass, and the component (c) is 0.1 to 50%. The remaining part is (d) component water, and the total content of (a) + (b) + (c) + (d) is 100% by weight.

  Content of (a) component used for this invention is 0.0001-5 mass%, Preferably it is 0.001-3 mass%, More preferably, it is 0.005-1 mass%. When the content of the component (a) is less than 0.0001% by mass, a moist feeling and a bright yellow color may not be obtained. On the other hand, even if the content of the component (a) exceeds 5% by mass, an effect commensurate with the blending amount cannot be obtained, which is economically disadvantageous.

  In addition, content of (a) component is the mass of the dry residue of a turmeric rhizome extract, and not only the mass of the residue actually removed by removing the solvent, but also the amount of solvent contained in the residue. The mass of the residue calculated and reduced in the amount of solvent is also conceptually included. For example, when the extraction solvent is volatile, the extraction solvent is completely distilled off at 105 ° C. to 120 ° C., and is the mass of the remaining solid content. When the extraction solvent is nonvolatile, high performance liquid chromatography The amount of the solvent is quantified by, for example, and the amount of other components is the mass of the dry residue.

  Content of (b) component used by this invention is 30-99 mass%, Preferably it is 33-95 mass%, More preferably, it is 35-90 mass%. When the content of the component (b) is less than 30% by mass, sufficient foaming may not be obtained.

  Content of (c) component used by this invention is 0.1-50 mass%, Preferably it is 0.3-45 mass%, More preferably, it is 0.5-40 mass%. Moreover, when making the solid soap composition of this invention into a transparent solid soap, it is preferable to contain 30-50 mass% of (c) component. When the content of the component (c) is less than 0.1% by mass, a moist feeling may not be obtained or cracks may occur, and when it exceeds 50% by mass, sufficient foaming may not be obtained.

  The water content of the component (d) used in the present invention is 8 to 16% by mass when solid soap is obtained by the mechanical kneading method, and is 12 to 25% by mass when solid soap is produced by the frame kneading method. However, it is preferable because the solid soap composition of the present invention can be efficiently produced.

  Although the solid soap composition of the present invention can be produced by a mechanical kneading method or a frame kneading method, the frame kneading method is preferred when producing a transparent solid soap. In order to produce a transparent solid soap by a frame kneading method, for example, after adding a polyhydric alcohol, ethanol and water as the component (c) to a previously dissolved saturated fatty acid or saturated fatty acid ethyl ester, and neutralizing with a basic compound Furthermore, the turmeric rhizome extract of (a) component is added. Next, after pouring into a mold and solidifying the soap, it is cut into a suitable size and dried in a drying room. After drying, the frame is kneaded by rough polishing, stamping, and finish polishing to obtain transparent solid soap.

  You may use the solid soap composition obtained by this invention as a powder soap through a grinding | pulverization process, a drying process, a ball-spinning process, etc.

  The solid soap composition of the present invention has components that are usually used in cleaning agents, for example, oily raw materials, moisturizers, surfactants, thickeners, antioxidants, chelating agents, as long as the characteristics of the present invention are not impaired. , Fragrances, colorants, animal and plant extracts, and the like can be appropriately blended.

  Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples. First, the preparation method of the rhizome extract of turmeric (Curcuma Longa) used in the Example of this invention is shown. Unless otherwise indicated,% represents mass%.

[Preparation method of curcuma longa rhizome extract]
After turmeric (Curcuma Longa) rhizomes are sliced and dried, 15 times by mass of 80 mass% 1,3-butylene glycol aqueous solution is added, extracted for one week at room temperature, and filtered, Rhizome extract was obtained. The dried residue of the turmeric rhizome extract was measured and found to be 0.3 w / v%.

<Preparation of solid soap>
Using the turmeric rhizome extract, the mixed fatty acids 1 to 4 having the composition shown in Table 1, the basic compound shown in Table 2, and the common blending raw materials shown in Table 3, the following methods are used in Table 4 and Table 5. The indicated solid soap was prepared. The mixed fatty acids 1 to 4 were prepared by appropriately blending simple fatty acids. In Table 1, C12 is lauric acid, C14 is myristic acid, C16 is palmitic acid, and C18 is stearic acid.

[Preparation Example 1 (Example 1)]
After dissolving 1000 g of mixed fatty acid at 70 ° C. using a 5 L double-arm kneader (PNV-5 type manufactured by Irie Shokai Co., Ltd.), using a 28% basic compound aqueous solution of the basic compounds shown in Table 2 It was summed up. The neutralization point was confirmed using a phenolphthalein indicator solution. A soap base was obtained by drying with heating and stirring to about 10% by weight of water. A common blending component shown in Table 3 and the components (a) and (c) shown in Table 4 were added to the soap substrate at a predetermined ratio, and a pod with a chinos-like metal fitting attached to the base (Nippon Chemical Industry Co., Ltd.) ) “Mini Soap Prodder”) and a roll mill (“BR-150 Bench Roll” manufactured by AIMEX Co., Ltd.) 3 times, kneaded 3 times, and then used as a soap bar with a pudder. Solid soap (60 × 40 × 15 mm) was obtained. The loss on drying of the obtained solid soap was measured according to JIS-K3304, and this was taken as the water content.

The following compounds were used in Examples and Comparative Examples.
Glycerin ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ ･ NOF CORPORATION "RG-S"
Sucrose ・ ・ ・ Nippon Powder Pharmaceutical Co., Ltd. “Japanese Pharmacopoeia White Sugar”
Sorbitol: Towa Kasei Kogyo Co., Ltd. “Sorbit D-70”
Glycosyl trehalose-Hayashibara Biochemical Research Institute "Tornare"
Lauric acid ... NOF "NAA-122"
d-δ-Tocopherol Eisai Food Chemical Co., Ltd. “d-δ-Tocopherol”
Gardenia extract ... Ichimaru Falcos Co., Ltd. "Kuchina Liquid"
Paprika extract: Saneigen FFI Co., Ltd. “Paprika Base 250”
28% aqueous solution of basic compound: Distilled water was added to a reagent-grade basic compound to a concentration of 28% by mass.

  With the composition (mass%) shown in Table 4 and Table 5, it prepared similarly to the preparation example 1, and obtained the solid soap of Examples 2-5 and Comparative Examples 1-3. For the solid soaps of Examples 1 to 5 and Comparative Examples 1 to 3, the foaming property, foam quality, moist feeling, cracking, and color development were evaluated according to the following criteria.

(Foamability) 10 women (10-30s) were panelists, and foaming when soap was bubbled up was evaluated based on the following criteria.
2 points ··· When bubbles feel quickly and feel good 1 point · · · When you feel that it takes some time to foam 0 points · · · It takes a very long time to foam and foaming If you feel bad

In addition, it determined as follows from the total score of all the panelists.
○ ・ ・ The total score is 14-20, and there is no person who gave 0 points.
Δ ·· The total score is 7 to 13 points.
× ·· The total score is 0 to 6 points.

(Foam quality) 10 women (10-30s) were panelists, and the foam quality when soap was bubbled was evaluated based on the following criteria.
2 points ... If you feel that it is very creamy foam 1 point ... If you feel that it is a little creamy, but you want to be more creamy 0 points ... If you feel that it is not creamy

In addition, it determined as follows from the total score of all the panelists.
○ ・ ・ The total score is 14-20, and there is no person who gave 0 points.
Δ ·· The total score is 7 to 13 points.
× ·· The total score is 0 to 6 points.

(Moist feeling) Ten females (10's to 30's) were panelists, and the usability of soap was evaluated based on the following criteria.
2 points: No feeling of stickiness or sliminess, and good wash-up.
1 point ... There is a slight sense of tension and sliminess.
0 points: There is a feeling of tightness and sliminess.

In addition, it determined as follows from the total score of all the panelists.
○ ・ ・ The total score is 14-20, and there is no person who gave 0 points.
Δ ·· The total score is 7 to 13 points.
× ·· The total score is 0 to 6 points.

(Crack) Solid soap was immersed in water at about 20 ° C. for 90 minutes and then taken out and left to dry in a constant temperature bath at 20 ° C. overnight. Cracks on the soap surface after standing were observed and evaluated according to the following criteria. As shown in FIG. 1, the solid soap 1 is fixed by being sandwiched between ends of a wire 2 bent in a hook shape, and the top of the wire 2 is suspended by a thread 3 so that the entire surface of the soap is exposed to water or air. Tested for equal contact.
○ ・ ・ No cracks.
△ ・ ・ There are shallow or small cracks.
× ・ ・ There are deep or large cracks.

(Color development) Solid soap was visually observed and evaluated according to the following criteria.
○ ・ ・ Vivid color.
△ ・ ・ Slightly dull color.
× ·· The color is very dull or not colored at all.

  As shown in Table 4, in Examples 1-5, the turmeric rhizome extract of (a) component is 0.0001-5 mass%, the saturated fatty acid alkali metal salt of (b) component is 30-99 mass%, (c ) By containing 0.1 to 50% by mass of the component polyhydric alcohol, it is possible to obtain a solid soap having excellent foamability, foam quality, moist feeling, cracking prevention effect and color development.

  On the other hand, as shown in Table 5, Comparative Example 1 containing no turmeric rhizome extract does not provide a sufficient effect in moist feeling, crack prevention, and color development. In Comparative Example 2 containing a gardenia extract without using a turmeric rhizome extract, the foam quality, moist feeling, cracking prevention effect and color development were insufficient. In Comparative Example 3 containing paprika extract, Moist feeling, crack prevention effect and color development were insufficient.

  Furthermore, using the turmeric rhizome extract, the mixed fatty acid 1 having the composition shown in Table 1, the basic compound shown in Table 6, and the common blending raw material shown in Table 7, the transparent solid soap shown in Table 8 by the following method Was prepared.

[Preparation Example 2 (Example 6)]
Using a four-necked flask having a reflux apparatus and a stirrer, 1000 g of mixed fatty acid is dissolved at a temperature of 80 ° C. Next, 150 g of water and 600 g of ethanol are added with stirring. Next, a 28% basic compound aqueous solution (sodium hydroxide / potassium hydroxide = 80% / 20%) of the basic compound shown in Table 6 prepared in advance is slowly added and mixed with stirring until uniform. Next, the common blending components in Table 7 and the components (a) and (c) shown in Table 8 are added at a predetermined ratio and mixed uniformly. Take out a small amount and confirm that it is slightly red with a phenolphthalein indicator. If it is not faint, adjust with 28% basic compound aqueous solution or saturated fatty acid.

  Next, it is poured into a cylindrical mold (φ65 mm) and allowed to cool at room temperature for 12 hours to solidify. After confirming that it is completely solidified, it is removed from the mold and cut into a thickness of 3 cm. The cut transparent solid soap is dried at room temperature for 1 month. Next, stamping and polishing were performed, and after drying overnight, final polishing was performed to obtain a transparent solid soap having a diameter of 6.5 cm and a thickness of 2.3 cm.

  The transparent solid soaps of Examples 7 and 8 and Comparative Examples 4 to 6 were obtained in the same manner as in Preparation Example 2 with the composition (% by mass) shown in Table 8. With respect to the obtained transparent solid soaps of Examples 6 to 8 and Comparative Examples 4 to 6, foaming property, foam quality, moist feeling, and color development were evaluated on the same basis as the solid soap, and further, transparency and stickiness. Evaluation was performed according to the following criteria.

(Transparency) By 20 panelists (10-30s), the transparency of the transparent solid soap is determined by visual observation, and the transparent solid soap is placed on the paper on which the 4-point katakana is written, The total value of 20 people was calculated and evaluated. However, the insoluble component derived from the extract was not regarded as cloudy or cloudy, and only the white cloudy or cloudy derived from soap was used as a criterion.
2 points: Transparent with no cloudiness, and 4 point characters can be easily distinguished.
1 point: Slightly cloudy but transparent, and 4 point characters can be distinguished.
0 point: Cloudy or cloudy, 4 point characters cannot be discerned, or part or all is cloudy.

In addition, it determined as follows from the total score of all the panelists.
○ ... A total of 28 to 40 points, and no one gave 0 points.
Δ: The total score is 14 to 27 points, and there is no person who gave 0 points.
X: Some people have 0 to 13 total points or 0 points.

(Stickness) The condition of the surface of the sample after leaving it in a thermostatic chamber with a humidity of 85% (temperature: 23 ° C.) for 12 hours was judged by visual and touching according to the following criteria.
○… No stickiness or sweating is observed.
Δ: Slight stickiness or sweating is observed.
X: Significant stickiness and sweating are observed.

  As shown in Table 8, in Examples 6-8, the turmeric rhizome extract of (a) component is 0.0001-5 mass%, the saturated fatty acid alkali metal salt of (b) component is 30-99 mass%, (c ) By containing 0.1 to 50% by mass of the component polyhydric alcohol, it has excellent transparency and color developability, is less likely to cause stickiness and sweating, and has excellent foaming properties and creamy foam during use. It can be seen that a framed transparent soap is obtained that is excellent in quality and has a feeling of use, and has a moisturizing effect after use.

  On the other hand, in Comparative Example 4 containing no turmeric rhizome extract, sufficient effects are not obtained with foam quality and color development. In Comparative Example 5 using the gardenia extract without using the turmeric rhizome extract, the foam quality, moist feeling and color development were insufficient. In Comparative Example 6 using the paprika extract without using the turmeric rhizome extract, the foamability, foam quality and color development were insufficient.

1: Solid soap 2: Wire 3: Thread

Claims (2)

A solid soap composition comprising the following (a), (b), (c), (d).
(A) Turmeric (Curcuma Longa) rhizome extract 0.0001-5 mass%,
(B) 30 to 99% by mass of a saturated fatty acid alkali metal salt,
(C) at least one polyhydric alcohol selected from glycerin, sucrose, sorbitol, glycosyl trehalose, 0.1 to 50% by mass,
(D) Water   The saturated fatty acid constituting the (b) saturated fatty acid alkali metal salt consists of 10 to 40% by mass of lauric acid, 30 to 70% by mass of myristic acid, 5 to 25% by mass of palmitic acid, and 0 to 30% by mass of stearic acid, The total amount of lauric acid, myristic acid, palmitic acid and stearic acid is 100% by mass, the alkali metal is sodium and potassium, and the mass ratio of sodium / potassium is 99/1 to 50/50. The solid soap composition according to 1.

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