JP2011057765A - Framed transparent bar soap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a framed transparent bar soap that foams well, is excellently transparent and has good hardness though it contains honey in a high concentration, and a manufacturing method of the same. <P>SOLUTION: The framed transparent bar soap comprises as essential ingredients (A) a fatty acid soap, (B) a polyhydric alcohol, (C) honey and (D) an aqueous solvent, where the compounded amount of honey is 15-25 wt.% in terms of the charge amount. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a transparent solid soap produced by frame kneading and a method for producing the same. More specifically, the present invention relates to a transparent solid soap having good foaming and excellent transparency while containing honey in a high concentration, and a method for producing the same.

  In fatty acid soaps based on sodium salts of higher fatty acids, blending with clarifying agents such as glycerin, sorbitol, sucrose, etc., suppresses the crystallization of the soap and makes it finely crystallized. Transparent bar soap is known. Since such solid soap is transparent, there is an image that it is a luxury product than general soap.

  Such a transparent solid soap, after blending a fatty acid soap with a clarifying agent, dissolved in a mixed solvent of lower alcohol such as ethyl alcohol and water with heating, poured into a mold, cooled and solidified, and then removed from the mold Further, it is produced by a method of gradually evaporating and drying the solvent over a long period of 2 months, that is, a so-called “frame kneading method” (see Non-Patent Document 1 and Patent Documents 1 and 2).

  Honey, on the other hand, is a sweet product collected by beehives and is widely used as a sweetener containing glucose, fructose and a small amount of maltose as a main component, and containing special nutritional components such as oligosaccharides, vitamins and minerals. Yes. In addition, the honey has a moisturizing action, and has been conventionally used as a component of soap and cosmetics because it exhibits a beautifying effect.

  However, when 10% by weight or more of honey is added to the soap, the soap becomes brittle and easily melts, and the transparency decreases with time. And a problem that the feeling of use decreases.

Japanese Unexamined Patent Publication No. 57-30798 Japanese Patent Laid-Open No. 2002-80896

"Cosmetics" Publisher: Nanzan-do Editor: Tetsu Ikeda, 1st edition: 1957.4.10, corresponding page: P197-207

  The present invention solves the above-mentioned problems (decrease in transparency, decrease in foaming, weakening, cleaning effect and decrease in feeling of use) when blending a high amount of honey with a soap bar. It is an object of the present invention to provide a frame-kneaded transparent solid soap that can be blended at a high rate of% (charge amount). That is, by providing honey in a large amount of 15 to 25% by weight, a transparent and high-quality solid soap having excellent moisturizing effect and skin beautifying effect, good foaming and excellent cleaning effect and feeling of use is provided. With the goal.

  The present inventors have repeatedly studied to produce a transparent solid soap that solves the above problems by a frame kneading method, and as an essential component (A) fatty acid soap, (B) polyhydric alcohol, (C) honey. And (D) In a transparent solid soap containing an aqueous solvent, the blending ratio of lauric acid and stearic acid in the fatty acid constituting the fatty acid soap is adjusted to 28 to 34% by weight and 9 to 11% by weight, respectively. In addition, even when blending 15% by weight or more of honey with soap, it has been found that the phenomenon that the transparency decreases with time and the phenomenon that it becomes brittle and easily melts can be suppressed, and the proportion of honey is reduced. By setting the amount to be in the range of 15 to 25% by weight, the foaming is remarkably improved as compared with the case where honey is not blended. Quality is also improved, creamy fine bubbles that elasticity is obtained by, we found this by feeling markedly increases.

The present invention has been completed based on such findings and has the following configuration:
(I) A framed transparent solid soap (I-1) fatty acid soap, (B) a polyhydric alcohol, (C) honey, and (D) a framed transparent solid soap containing an aqueous solvent as essential components, A blended transparent solid soap, characterized in that the blending amount is 15 to 25% by weight.
(I-2) (A) Fatty acids constituting the fatty acid soap are at least lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid, and lauric acid and stearic acid in the total amount (100% by weight) of the fatty acid The blended ratio of 20 to 40% by weight and 5 to 15% by weight, respectively, characterized in that the transparent kneaded solid soap described in (I-1).
(I-3) The frame-kneaded transparent solid soap described in (I-2), wherein the blending ratios of lauric acid and stearic acid are 25 to 35% by weight and 5 to 12% by weight, respectively.
(I-4) The frame-kneaded transparent solid soap according to (I-2), wherein the blending ratio of lauric acid and stearic acid is 28 to 34% by weight and 9 to 11% by weight, respectively.
(I-5) The frame-kneaded transparent solid soap according to any one of (I-2) to (I-4), wherein the blending ratio of oleic acid is 10 to 30% by weight.
(I-6) The framed transparent solid soap according to any one of (I-2) to (I-4), wherein the blending ratio of oleic acid is 15 to 25% by weight.
(I-7) The frame-kneaded transparent solid soap according to any one of (I-2) to (I-4), wherein the blending ratio of oleic acid is 19 to 23% by weight.
(I-8) The mixing ratio of myristic acid and palmitic acid is 5 to 15% by weight and 20 to 40% by weight, respectively (I-2) to (I-7) A transparent soap bar that is kneaded into a frame.
(I-9) The mixing ratio of myristic acid and palmitic acid is 8 to 12% by weight and 20 to 32% by weight, respectively, according to any one of (I-2) to (I-7) A transparent soap bar that is kneaded into a frame.
(I-10) The mixing ratio of myristic acid and palmitic acid is 9 to 11% by weight and 24 to 29% by weight, respectively, according to any one of (I-2) to (I-7) A transparent soap bar that is kneaded into a frame.
(I-11) (A) Fatty acids constituting the fatty acid soap are at least lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid, and lauric acid and stearic acid occupying the total amount (100% by weight) of the fatty acid The blended transparent soap bar according to (I-1), wherein the blending ratios of 28 to 34% by weight and 9 to 11% by weight, respectively.
(I-12) The frame-kneaded transparent solid soap described in (I-11), wherein the blending ratio of oleic acid is 19 to 23% by weight.
(I-13) The framed transparent solid soap described in (I-11) or (I-12), wherein the blending ratio of palmitic acid is 24 to 29% by weight.
(I-14) The frame-kneaded transparent solid soap according to any one of (I-11) to (I-13), wherein the blending ratio of stearic acid is 9 to 11% by weight.
(I-15) (A) Fatty acids constituting the fatty acid soap are at least lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid, and the blending ratio of each fatty acid in the total amount (100% by weight) of the fatty acid Lauric acid: 28-34 wt%, myristic acid: 9-11 wt%, palmitic acid: 24-29 wt%, stearic acid: 9-11 wt%, and oleic acid: 19-23 wt% A transparent solid soap kneaded in a frame as described in (I-1).
(I-16) The amount of honey blended is 15 to 20% by weight, and the frame-kneaded transparent solid according to any one of (I-1) to (I-15) Soap.

(II) Manufacturing method of frame-kneaded transparent soap (II-1) A method of manufacturing frame-kneaded transparent soap described in any one of (I-1) to (I-16), wherein (A) to (D ), A transparent saponified soap paste is solidified by cooling in a mold into which the transparent saponified soap paste prepared by mixing all components of (3) is poured at 8 to 13 ° C. for 3 hours or more.

  The transparent solid soap of the present invention is formulated with a honey content of 15 to 25% by weight, preferably as high as 15 to 20% by weight, and as a result, has excellent moisturizing effect and skin beautifying effect. In addition, while honey is blended in a high content of 15 to 25% by weight, preferably 15 to 20% by weight, the phenomenon that the transparency decreases with time and the phenomenon that the honey becomes brittle and easily melts. It is what is suppressed. Moreover, the transparent solid soap of the present invention is characterized by being excellent in foaming properties, being easy to form creamy fine bubbles, and having good foam retention. Thereby, it is excellent in detergency and feeling of use, and can be used effectively as a cleaning agent for face washing.

It is a figure which shows the outline of the manufacturing process of the transparent solid soap of this invention. The result of the bubble force test performed in Experimental Example 1 is shown. The result of the bubble diameter measurement test done in Experimental Example 3 is shown. The measurement result of the skin state (moisture content, sebum content) after face washing performed in Experimental Example 4 is shown.

(1) Frame-kneaded transparent solid soap Frame-kneaded transparent solid soap of the present invention contains (A) fatty acid soap, (B) polyhydric alcohol, (C) honey, and (D) an aqueous solvent as essential components. Transparent soap, characterized in that the honey content is 15 to 25% by weight.

(A) Fatty acid soap Here, (A) fatty acid soap is one in which the fatty acid constituting the fatty acid soap is a linear, branched, or saturated or unsaturated fatty acid having 8 to 22, preferably 12 to 18 carbon atoms. Can be mentioned. Preferred examples include fatty acid soaps in which the constituent fatty acids are at least lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid.

  Here, the proportion of lauric acid in 100% by weight of the constituent fatty acid soap is 20 to 40% by weight, preferably 25 to 35% by weight, more preferably 28 to 34% by weight, most preferably 29 to 32% by weight. The proportion of stearic acid is 5 to 15% by weight, preferably 5 to 12% by weight, more preferably 9 to 11% by weight, and most preferably 9.5 to 10.5% by weight. The proportion of oleic acid is 10 to 30% by weight, preferably 15 to 25% by weight, more preferably 19 to 23% by weight, and most preferably 20 to 23% by weight. In addition, the proportion of myristic acid is 5 to 15% by weight, preferably 8 to 12% by weight, more preferably 9 to 11% by weight, most preferably 9.5 to 10.5% by weight; the proportion of palmitic acid 20 to 40% by weight, preferably 20 to 32% by weight, more preferably 24 to 29% by weight, and most preferably 25 to 28% by weight.

  Moreover, as a counter ion of the fatty acid constituting the fatty acid soap, an alkali metal atom such as lithium, potassium or sodium, an ammonium group, an alkanolamine having a C2-C3 hydroxyalkyl group or a cation residue of a basic amino acid, etc. Can be mentioned. Such fatty acid soaps can be prepared by neutralizing higher fatty acids derived from animal or vegetable oils such as beef tallow, lard, palm oil, palm oil, palm kernel oil, or fatty acid esters thereof with caustic soda or the like. .

  The proportion of the fatty acid soap (A) to be blended in the transparent solid soap of the present invention can be appropriately set according to the type of fatty acid soap to be used, desired soap hardness, and the like. The charge amount is usually 20 to 55% by weight, preferably 28 to 51% by weight, more preferably 32 to 40% by weight. As will be described later, when the aqueous solvent evaporates in the drying step in the manufacturing process, the weight of the final product (transparent solid soap) is about 66 to 88% by weight of the total charged weight (100% by weight). It is considered that 1.13 to 1.6 times (weight ratio) of the charged amount is the ratio of (A) fatty acid soap contained in the transparent solid soap (usually 22.6 to 88% by weight, preferably 31). .6 to 81.6% by weight, more preferably 36.1 to 64% by weight).

(B) Polyhydric alcohol In the transparent solid soap of the present invention, (B) the polyhydric alcohol functions as a clearing agent, and the polyhydric alcohol used as the clearing agent in the conventional transparent soap is the present. The same applies to the invention.

  Specifically, the polyhydric alcohol is a compound having a liquid surface at room temperature having two or more hydroxy groups in one molecule. Examples of the divalent alcohol include ethylene glycol, diethylene glycol, and triethylene. Examples include glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, and 1,3-butylene glycol. Examples of the trivalent alcohol include glycerin. Further, examples of the alcohol having 4 or more valences include sucrose, glucose, mannitol, sorbitol, maltitol, trehalose, maltose, pullulan, pectin, lactose, xylit, carrageenan, and alginic acid. Preferably, it is a 4-6 carbon sugar monosaccharide or a disaccharide sugar alcohol.

  These polyhydric alcohols may be used alone or in any combination of two or more. Preferred examples include glycerin, sorbitol, and sucrose.

  The ratio of the (B) polyhydric alcohol to be blended in the transparent soap of the present invention varies depending on the type of polyhydric alcohol to be used, and can be appropriately set according to these. The charge amount is usually 5 to 30% by weight, preferably 8 to 20% by weight, and more preferably 9 to 13% by weight. (A) As with fatty acid soaps, the weight of the final product (transparent solid soap) is about 66 to 88% by weight of the total charged weight (100% by weight) because the aqueous solvent evaporates in the drying step in the manufacturing process. In view of this, it is considered that 1.13 to 1.6 times (weight ratio) of the above charged amount is the ratio of (B) polyhydric alcohol contained in the transparent solid soap (usually 5.6 to 48 weight). %, Preferably 9.0 to 32% by weight, more preferably 10.1 to 20.8% by weight).

(C) Honey In the transparent soap of the present invention, (C) Honey is an active ingredient that exhibits a moisturizing action and a skin beautifying effect, and is 15 to 25% by weight (preparation amount), more preferably 15 to 20% by weight. It functions also as a foaming agent by mix | blending in the ratio of (preparation amount).

  Honey is a natural sweetener that bees make from the nectar collected from flowers and store it in the nest. Depending on the type of flower, honey is also classified into lotus honey, clover honey, acacia honey, and the like, and any honey can be used in the present invention without any particular limitation. Two or more kinds of honey can also be mixed and used.

  In addition, the honey targeted by the present invention includes “honey” defined by the 15th revised Japanese Pharmacopoeia. In the 15th revised Japanese Pharmacopoeia Manual (published by Yodogawa Shoten Co., Ltd., Editor: Japanese Pharmacopoeia Manual Editorial Board), “Honey” is described as follows.

“This product is the final sweetener collected in the nest by the European bee Apis mellifera Linne or Apis indica Radoszkowski ( Apidae ).
Herbal properties: This product is a light yellow to light tan syrup liquid, usually transparent, but often crystallizes and becomes opaque. This product has a unique smell and a sweet taste.
Specific gravity: A solution in which 50.0 g of this product is mixed with 100 mL of water has a specific gravity d ²⁰ ₂₀ : 1.111 or more.

Purity test
(1) Acid: When 10 g of this product is mixed with 50 mL of water and titrated with 1 mol / L potassium hydroxide solution, the amount consumed is 0.5 mL or less (indicator: 2 drops of phenolphthalein test solution).
(2) Sulfate: When 1.0 g of this product is mixed with 2.0 mL of water, filtered, and 2 drops of barium chloride sample solution is added to the filtrate, the solution does not change immediately.
(3) Ammonia product: 1.0 g of this product is mixed with 2.0 mL of water, filtered, and when 2 mL of ammonia reagent solution is added to the filtrate, the solution does not change immediately.
(4) Resorcinol product: 5 g of this product was added with 15 mL of diethyl ether, mixed well, the diethyl ether solution obtained by filtration was evaporated at room temperature, and 1 to 2 drops of resorcinol sample solution was added to the residue. Even if the thing and the liquid exhibit yellowish red, they do not exhibit red to reddish purple that lasts for 1 hour or more.
(5) Starch and dextrin:
(i) Add 15 mL of water to 7.5 g of this product, shake and mix on a water bath, add 0.5 mL of tannic acid test solution to this, cool, and then add ethanol (29.5%) to 1.0 mL of the filtered solution (99.5 ) When 1.0mL is added, the liquid does not become turbid.
(ii) Add 10 mL of water to 2.0 g of this product, heat and mix on a water bath, and after cooling, add 1 drop of iodine test solution to 1.0 mL of this solution and shake to mix the solution with blue, green or reddish brown color. Not present.
(6) Foreign matter: 1.0 g of this product is mixed with 2.0 mL of water, centrifuged, and when the resulting precipitate is examined by microscopic examination, no foreign matter other than pollen is observed.
Ash: 0.4% or less. "

In addition, the honey targeted by the present invention includes the definition of honey stipulated in the “Honey Codex standard”, which is an international honey standard, “plant nectar, secretions from plant tissue, or plant life. A natural sweet substance produced by Apis mellifera species ( Apis mellifera ) from substances discharged by insects that suck plant juice on the death note, collected by honey bees, changed by combination with special substances possessed by honey bees, and stored Also included are those that fall under the category of “dehydrated, placed in the nest for aging”. The quality standard value defined in the “Honey Codex standard” is defined as follows.

  As a ratio of the said (C) honey mix | blended with the transparent solid soap of this invention, it is 15-25 weight% normally with preparation amount, Preferably 15-20 weight% can be mentioned. As with (A) fatty acid soap and (B) polyhydric alcohol, the weight of the final product (transparent solid soap) is 66 of the total charged weight (100% by weight) because the aqueous solvent evaporates in the drying process in the manufacturing process. Considering that the amount becomes about 88% by weight, it is considered that 1.13 to 1.6 times (weight ratio) of the charged amount is the ratio of (C) honey contained in the transparent solid soap (usually 16 0.9 to 40% by weight, preferably 16.9 to 32% by weight).

(D) Aqueous solvent In the transparent solid soap of the present invention, the (D) aqueous solvent functions as a solubilizer and / or a dissolution accelerator of fatty acid soap. As the solubilizer or dissolution accelerator, one or more of water or water-soluble lower alcohols used as a solubilizer or dissolution accelerator in conventional transparent soaps are also used in the present invention.

  Here, examples of the lower alcohol include linear or branched alcohols having 1 to 6 carbon atoms. Specific examples include methanol, ethanol, propanol, isopropanol, n-butanol, isobutanol, sec-butanol, and tert-butanol. Ethanol is preferable.

  These aqueous solvents may be used alone or in any combination of two or more. A combination of water and ethanol and a combination of water and propanol are preferable. Thus, when using it in combination with water and a lower alcohol, 74-90 weight part is normally mentioned as a ratio of the lower alcohol with respect to 100 weight part of water, Preferably it is 78-86 weight part, More preferably, 80-85 weight part is mentioned. be able to.

  The proportion of the aqueous solvent (D) to be blended in the transparent soap of the present invention is usually 15 to 65% by weight, preferably 25 to 50% by weight, more preferably 32 to 40% by weight. it can. When (D) water and a lower alcohol are used in combination as the aqueous solvent, the amount of water is usually 5 to 35% by weight, preferably 10 to 25% by weight, more preferably 13 to 13% by weight in the transparent solid soap. The lower alcohol is preferably blended in the transparent solid soap at a ratio of 20% by weight, usually 10-30% by weight, preferably 115-25% by weight, more preferably 18-20% by weight.

  As described above, the aqueous solvent (water + lower alcohol) evaporates in the drying process in the production process, and the content of the aqueous solvent in the final product (transparent solid soap) is about 9 to 28% by weight. In detail, the water content in the final product (transparent soap) is about 9 to 28% by weight, preferably 13 to 25% by weight, more preferably 18 to 21% by weight; About 1 to 8% by weight, preferably about 2 to 5% by weight, more preferably about 3 to 4% by weight.

  The water content (% by weight) contained in the final product (transparent solid soap (sample)) was measured by the “volatile content measurement method” (conforming to JIS K 3304) described below, and the volatile content obtained It can be calculated from (volatilized water content).

<Volatile content measurement method>
(1) Transparent bar soap (sample) obtained by cutting the transparent bar soap to be tested by the four-division method of JIS K 3304: 1997 “Preparation of sample” is cut as finely as possible and placed on a sample pan to spread the sample evenly.
(2) Adjust the infrared moisture meter lamp to a height of 8.0 cm and heat for 30 minutes.
(3) After heating, measure the weight loss caused by drying with an infrared moisture meter and use this as the volatile matter.

  Moreover, the lower alcohol content (% by weight) contained in the transparent solid soap (sample) is measured by “gas chromatograph FID method” described below, and is calculated from the obtained volatile matter (volatile water content). be able to.

<Gas chromatograph FID method>
(1) Put about half of water into a 100 mL volumetric flask. 0.2 g of acetone and 0.2 g of the lower alcohol to be measured are precisely weighed and made up to make a “standard solution”.
(2) Inject 0.5 μL of the “standard solution” prepared above into gas chromatography. Measure 3 times to calculate the correction factor.

(3) Put about half of the water into a 100 mL volumetric flask and precisely measure 4 g of acetone to make a volume up (internal standard solution).
(4) Pour about half of the water into a 100 mL volumetric flask. Weigh accurately 1 g of transparent soap bar (sample). Seal it and dissolve it gently. After dissolution, cool to room temperature.
(5) Add 5 mL of the “internal standard solution” prepared in (3) with a whole pipette, and measure up (sample solution).
(6) Inject 0.5 μL of the “sample solution” prepared above into the gas chromatography and calculate the ethanol content.

(E) Other components The following components can also be mix | blended with the transparent solid soap of this invention in the range which does not impair the effect | action mentioned above. These optional ingredients include fungicides such as trichlorocarbanilide and hinokitiol; maltitol, sorbitol, 1,3-butylene glycol, propylene glycol, sugar, pyrrolidone carboxylic acid, sodium pyrrolidone carboxylate, hyaluronic acid, polyoxyethylene alkyl Moisturizers such as glucoside ether; chelating agents such as ethylenediaminetetraacetic acid, trisodium edetate dihydrate, 1-hydroxyethane-1,1-diphosphonate (salt of etidronate); dipotassium glycyrrhizinate, psyllium extract, Natural extracts such as lecithin, saponin, aloe, prunus, tea, chamomile, placenta extract; nonionic, cationic or anionic surfactants, preferably sodium lauroylglutamate, sodium cocoylglutamate or N- N-acyl amino acid salts such as sil-L-glutamic acid triethanolamine; usability improvers such as lactic acid esters; sodium alkyl ether carboxylates, disodium alkylsulfosuccinates, sodium alkylisethionates, sodium polyoxyethylenealcosinates Anti-foaming agents such as dibutylhydroxytoluene; Anti-inflammatory agents (anti-inflammatory agents) such as allantoin and glycyrrhizinate; Processed products (extracted extract, etc.)); ultraviolet absorbers; oils; fragrances; pigments and the like.

(2) Manufacturing method of framed transparent solid soap The transparent solid soap of this invention mentioned above is manufactured by the frame kneading method normally used for manufacture of transparent soap among the manufacturing methods of solid soap. The outline of the manufacturing process is shown in FIG.

  As shown in FIG. 1, first, in the “heating / dissolution step” that is the first step, (D) an aqueous solvent is added to the fatty acid constituting the (A) fatty acid soap described above and dissolved by heating. Here, the temperature condition may be (D) a temperature at which the fatty acid dissolves in the aqueous solvent, and is not particularly limited, but about 50 to 55 ° C, preferably about 50 to 53 ° C is used. Here, as described in (1), the amount of fatty acid charged can be appropriately set according to the type of fatty acid to be used, but is produced in the second step “neutralization step” (A) Fatty acid In terms of the amount of soap, it is usually 20 to 50% by weight, preferably 24 to 44% by weight, and more preferably 27 to 35% by weight. At this time, the proportion of the (D) aqueous solvent to be added to the fatty acid may be 40 to 66 parts by weight, preferably 43 to 63 parts by weight with respect to 100 parts by weight of the total amount of fatty acids. In addition, it is preferable to use a lower alcohol here as (D) aqueous solvent. More preferred is ethanol.

  Next, in the “neutralization step” that is the second step, an aqueous solution in which an alkaline agent such as sodium hydroxide, potassium hydroxide, or alkanolamine is dissolved in water is added to the fatty acid heat-dissolved product to neutralize the fatty acid. To do. The ratio of the alkali agent used at this time may be an amount that can neutralize the fatty acid and produce the (A) fatty acid soap used in the present invention, and can be appropriately set according to the saponification value of the fatty acid. . The degree of neutralization of the fatty acid may be 90% or more, and neutralization may be performed under an alkali-excess condition in order to improve transparency. For the neutralization of the fatty acid, a temperature condition of about 70 to 75 ° C., preferably a temperature condition of about 70 to 73 ° C. is used.

  After completion of the neutralization reaction, after slightly cooling (70 ° C. or less, about 63 to 67 ° C.), (B) polyhydric alcohol is blended as a clearing agent, mixed and dissolved to make a transparent soap paste, (C) Honey and, if necessary, (E) Other ingredients are mixed and dissolved (third step).

  The transparent soap paste thus prepared is poured into a predetermined mold and cooled and solidified by allowing it to stand for 3 hours or more while cooling with cooling water of about 8 to 15 ° C., preferably about 8 to 13 ° C. ( (4th process).

  Here, the cooling time may be 3 hours or more, and is not particularly limited as long as it is, but is preferably 5 hours or more, more preferably 10 hours or more, and particularly preferably 18 hours or more. The longer the cooling time, the higher the hardness of the finished soap and the better the brittleness. However, considering the production efficiency, it is preferably about 18 to 40 hours, more preferably about 18 to 30 hours. .

  Next, the solidified transparent soap paste is cut (fifth step) and subjected to a drying step (sixth step).

  The drying is performed under the condition that the transparent soap paste is cut at a temperature of about 20 to 30 ° C. and a relative humidity of about 50 to 70% for about 30 to 50 days, and then a temperature of about 15 to 30 ° C. and a relative humidity of about 30 to 80%. In addition, it is usually carried out for about 10 to 20 days, so that the moisture and lower alcohol contained therein are gradually volatilized to form a stronger transparent solid soap.

  The transparent solid soap prepared by drying in this way is roughly wiped and stamped into a desired shape (seventh step), and then again under conditions of a temperature of about 15-30 ° C. and a relative humidity of about 30-80%. Usually, it is subjected to drying for about 10 to 20 days (eighth step).

  The transparent soap of the present invention thus prepared has an aqueous solvent content of about 9 to 28% by weight, specifically a water content of about 9 to 28% by weight, and a lower alcohol content of 0.1 by the drying step. It is reduced to about -8% by weight and solidified firmly, and then packaged and provided as a product.

  Hereinafter, the present invention will be specifically described by way of examples, but is not limited thereto.

Examples 1-4
A transparent solid soap was prepared according to the formulation (charge amount) described in Table 1. Moreover, the composition of the fatty acid, that is, the composition of the fatty acid constituting the fatty acid soap was set within the range shown in Table 2.

  Specifically, ethanol as a solvent was charged in a reaction kettle, and fatty acids (such as lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid) were added thereto, and the mixture was heated and mixed at 53 ° C. to dissolve. Separately, an aqueous solution in which sodium hydroxide was dissolved in water was poured little by little over 13 minutes and maintained at 73 ° C. to complete the fatty acid neutralization reaction. After completion of the reaction, while maintaining the temperature at 64 ° C., glycerol, sorbitol, a chelating agent (4 sodium etidronate) and honey were added and dissolved therein to obtain a transparent soap paste.

  The transparent soap paste thus obtained is poured directly into a predetermined form within 1 hour, and this is cooled and solidified over 20 hours using 10 ° C. cooling water to obtain a transparent solid soap. It was. Next, the obtained transparent soap bar is cut into an appropriate size and dried for 30 days at a temperature of about 25 ° C. and a relative humidity of about 60% for 30 days, and then at a temperature of about 25 ° C. and a relative humidity of about 60%. I let you. After drying, rough wiping and stamping were performed, and again dried for 15 days under conditions of a temperature of 25 ° C. and normal humidity (relative humidity 65 ± 15%) to obtain transparent solid soaps (test soaps 1 to 7).

  In addition, the composition of the fatty acid contained in the transparent solid soap can be measured by the following “fatty acid composition measurement method” (based on the Japan Oil Chemistry Association standard oil analysis method).

<Fatty acid composition measurement method>
(1) About 500 mg of the test soap is placed in an esterification flask, and 7 mL of trifluoroboric acid-methanol reagent is added.
(2) Attach a reflux condenser to the flask and boil for 2 minutes, then add 5 mL of hexane from the top of the condenser and boil for another 1 minute.
(3) Turn off the heat, remove the flask from the reflux condenser, and add saturated sodium chloride solution until the hexane solution reaches the neck of the flask.
(4) Transfer about 1 mL of hexane solution to a test tube, add a small amount of sodium sulfate (anhydride), dry it, and inject it directly into a gas chromatograph (FID gas chromatograph method).
(5) The composition of fatty acids (lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid) is calculated from the results of gas chromatography using a standard calibration curve.

  Next, for the test soaps 1 to 7 (Examples 1 to 4, Comparative Examples 1 and 2 and Control Example) prepared above, the foaming force test (Experimental Example 1), the foam elasticity test (Experimental Example 2), Foam diameter measurement test (Experiment 3), measurement of skin condition after face washing (water content, sebum content) (Experiment 4), usability evaluation (Experiment 5), and stability test over time (Experiment 6) Went.

Experimental Example 1 Foaming power test According to the following method, test soaps 1 to 7 (Examples 1 to 4, Comparative Examples 1 and 2, and a control example) were tested and foaming power (good foaming) was evaluated.

<Test method>
1. Each test soap 1-7 (honey compounding amount (preparation amount) 0, 10, 15, 18, 20, 25, 30% by weight) is dissolved in distilled water to prepare a 1% by weight aqueous solution.
2. Weigh 20 g in a colorimetric tube, hold the top and bottom of the colorimetric tube with the palm, and shake it up and down 10 times.
3. After shaking 10 times, place the colorimetric tube on the colorimetric tube stand and take a picture of the bubble as an image immediately after vibration.
4). Take pictures 15 and 30 minutes after installation.
5. From the images immediately after vibration, 15 minutes and 30 minutes later, the height of bubbles on the liquid surface is measured using image processing software (WinROOF: manufactured by Mitani Corporation).
6). Of the test soaps, the foam height obtained for test soap 1 (honey content 0%) was taken as 100%, and the foam heights obtained for other test soaps 2-7 were determined as relative ratios (%).

<Result>
The results are shown in FIG. As can be seen from this result, the transparent solid soap (test soaps 2 and 7: Comparative Examples 1 and 2) containing honey at a ratio of 10% by weight and 30% by weight has a foaming power as a control (test soap 1: The amount of honey is lower than that of honey (0%), whereas the transparent solid soap containing honey in a proportion of 15 to 25% by weight, particularly 15 to 20% by weight (test soaps 3 to 6: Examples 1 to 4) Was found to significantly increase the foaming power.

Experimental Example 2 Foam Elasticity Test According to the following method, foams produced using test soaps 1 to 7 (Examples 1 to 4, Comparative Examples 1 and 2, and a control example) were tested, and the elasticity of the foam was evaluated. .

<Test method>
1. Test soaps 1 to 7 (honey content (preparation amount) 0, 10, 15, 18, 20, 25, 30% by weight) are dissolved in distilled water to prepare a 10% by weight aqueous solution.
2. This is filled into a pump foam container and pumped five times to discharge foam onto a watch glass.
3. The bubbles discharged on the watch glass are photographed as an image immediately after the bubbles are made.
4). After taking the picture, place a 1-yen coin on the bubble and take a picture of the state of the 1-yen coin after 15 seconds and 60 seconds.

<Result>
A transparent solid soap that does not contain honey (test soap 1: control example) is a transparent solid soap in which a 1-yen coin has already submerged in the foam after 15 seconds and also contains 10% by weight of honey (test soap 2: comparative example 1) But after 60 seconds, a 1-yen coin sank in the foam. On the other hand, solid soap containing 15 to 30% by weight of honey (test soaps 3 to 7: Examples 1 to 4 and Comparative Example 2) has a 1-yen coin held on the foam even after 60 seconds. It was confirmed that highly elastic bubbles were formed.

Experimental Example 3 Foam Diameter Measurement According to the following method, the average diameter of the foam produced using the test soaps 1 to 7 (Examples 1 to 4, Comparative Examples 1 and 2, and the control example) was measured, and the fineness of the foam was measured. evaluated.

<Test method>
1. Test soaps 1 to 7 (honey content (preparation amount) 0, 10, 15, 18, 20, 25, 30% by weight) are dissolved in distilled water to prepare a 10% by weight aqueous solution.
2. This is filled into a pump foam container, and foam is discharged onto the slide glass.
3. The state of the bubbles is observed and photographed using a microscope (microscope VHX-900; manufactured by Keyence Corporation).
4). The diameter (nm) of the foam created using each test soap 1-7 is measured by the analysis system, and the average is calculated as the average foam diameter (nm) of each test soap.

<Result>
The results are shown in FIG. As can be seen from the results, transparent solid soap (test soaps 3 to 7: Examples 1 to 4 and Comparative Example 2) containing honey in a proportion of 15% by weight or more, especially honey in a proportion of 15 to 25% by weight. The blended transparent solid soap (test soaps 3 to 6: Examples 1 to 4) does not contain honey, or even when blended, the honey blend amount (preparation amount) is 10% by weight or less (test soap) 1-2: The average diameter of the foam was significantly smaller than that of the control and comparative example 1), and it was confirmed that fine foam was formed.

Experimental Example 4 Measurement of skin condition after face washing (water content, sebum content)
Have 3 panelists (female) wash their face using test soaps 1-3 and 5-7 (Examples 1, 3 and 4, Comparative Examples 1-2, control example), before and after face washing Changes in the amount and sebum amount were measured, and the effect on the skin (moist feeling, moist feeling, and feeling of tension) of the face wash using the test soap was evaluated.

<Test method>
1. Using test soap 5 (honey blending amount (preparation amount) 20% by weight: Example 3) as a standard soap, this is foamed and half of the face is washed.
2. The remaining half of the face is washed with foamed test soaps 1-2 and 5-7 (honey content (preparation amount): 0, 10, 15, 25, 30% by weight).
3. Before and after face washing (5 minutes after face washing), the skin moisture content and sebum content were measured for skin surface horn layer moisture content measuring device (SKICON-010: manufactured by IBS Co., Ltd.) and oil meter (Cebu Measure using a meter SM815 (manufactured by SK).
4). The change rate of the measured value before and after washing the face half washed with the standard soap (test soap 5) and the remaining face half washed with the other test soaps (test soaps 1-3 and 6-7) Calculate the decrease rate of the measured value before and after).

<Result>
The results are shown in FIG. Fig. 4 shows the rate of decrease in the measured values (water content, sebum content) before and after face washing with respect to the standard soap (test soap 5: honey content (preparation amount) 20% by weight) as 100%. 1 to 3 and 6 to 7 (honey content (feed amount): 0, 10, 15, 25 and 30% by weight) before and after the face washing, the change in the relative ratio (%) to the above. Yes (this is called “skin change rate%”).

  As a result, the relative ratio (%) (skin change rate%) of the change in the amount of moisture and the change in the amount of sebum before and after the face washing of the test soap 1 having a honey content of 0% by weight was 75% and 55%, respectively. In addition, the relative ratio (%) (skin change rate%) of the change in the amount of water and sebum before and after the face washing of the test soap 2 with 10% by weight of honey (preparation amount) was 70% and 76%, respectively. It was. This indicates that the water content and sebum content are reduced by face washing. On the other hand, the relative ratio (%) of the change in water amount and sebum amount before and after face washing (skin change rate%) of test soap 3 with 15% by weight of honey blended (prepared amount) was 108% and 105%, respectively. Relative ratio (%) (skin change rate%) of moisture change and sebum amount change before and after face washing of test soap 6 with 25% by weight (preparation amount) is 112% and 110%, respectively, The relative ratio (%) (skin change rate%) of the change in the amount of water and the change in the amount of sebum of the test soap 7 having a preparation amount of 30% by weight was 112% and 113%, respectively. This indicates that the water content and sebum content are increased by face washing. This means that a transparent solid soap having a honey blending amount (preparation amount) of 15 to 30% by weight has a high water content retention rate even if it is washed, and does not drop the sebum more than necessary.

Experimental Example 5 Usability Evaluation Three panelists (female) were used to test soaps 1 to 3 and 5 to 7 (Examples 1, 3 and 4, Comparative Examples 1 to 2 and a control example) and washed with foam. Feel of foam (a. Foam is creamy, b. Foam is smooth, c. Foam is soft, d. Foam is elastic, e. Foam is good) and skin condition after face washing (f. The skin was moist, g. Moisturized skin persisted, h.

<Evaluation criteria>
1: I don't think so 2: I don't think so 3: Neither 4: I think so 5: I think so

<Result>
The results are shown in Table 3. A result shows the average value of evaluation of 3 persons.

  This result was in good agreement with the foam state tested in Experimental Examples 1 to 3 and the skin state tested in Experimental Example 4.

  From these results, the transparent solid soap of the present invention (test soaps 3 to 6: Examples 1 to 4) formulated with honey in a proportion of 15 to 25% by weight is excellent in foaming properties (foaming). According to the results, it was confirmed that fine creamy and lasting bubbles could be produced (Experimental Examples 1 to 3). In general, it is known that bubbles, particularly fine bubbles, have a function of absorbing and enveloping dirt (dirt removal action). In addition, as shown in Experimental Example 5, the foam formed by the transparent soap of the present invention is a fine creamy and smooth foam, which is gentle to the skin, and therefore is judged to be particularly suitable for face washing.

  Further, as can be seen from the results of Experimental Example 4 and Experimental Example 5, when the transparent solid soap of the present invention is used, since the sebum content is not taken more than necessary, the skin does not become tight and the skin is moist and moistened. It was confirmed to last.

Experimental Example 6 Stability test over time Test soaps 1 to 7 (honey content (preparation amount): 0, 10, 15, 18, 20, 25, 30% by weight) were allowed to stand at room temperature for 3 months, Changes (transparency and precipitation phenomenon) were observed.

  As a result, in the transparent solid soap having a honey content of 30% by weight, the transparency of the soap gradually decreased and the transparency was lost due to the precipitation phenomenon of sugar. In addition, fine white spots appeared throughout. However, the transparent solid soap having a honey content of 0 to 25% by weight maintained transparency without precipitation. From this, it is clear that the transparent solid soap having a honey content of 15 to 25% by weight contains a relatively high proportion of honey, but does not precipitate over time, and the transparency is stably maintained. confirmed.

Experimental Example 7 Hardness test After 1 to 7 soaps (honey content (preparation amount): 0, 10, 15, 18, 20, 25, 30% by weight) were allowed to stand at room temperature for 3 months, the hardness was determined according to the following method. Was measured.

<Measurement of hardness>
(1) Place the test soap in a thermo-hygrostat adjusted to 20 ° C and relative humidity 60% and leave it for 1 hour.
(2) Put the test soap on the measuring table and use the lifting shaft knob of the hardness meter (Shimadzu rubber hardness tester 200 type: manufactured by Shimadzu Corporation) having the performance according to JIS K 6301-1975 spring type hardness test A type Then gently lower the hardness meter. (3) After standing for 3 seconds, record the hardness.

  Table 4 shows the results of evaluating the hardness measured according to the above method based on the following criteria.

<Evaluation criteria>
++: Hardness of 50 or more +: Hardness of 30 to less than 50—: Hardness of less than 30

  As can be seen from the above results, the transparent solid soap of the present invention having a honey content (preparation amount) of 15 to 25% by weight has hardness of less than 30 to 50 and has no practical problem. It was confirmed.

Example 5
A transparent soap bar having the following composition was prepared according to the method described in Experimental Example 1. The fatty acid composition of the fatty acid soap contained in the transparent solid soap is 30.9% by weight of lauric acid, 10.65% by weight of myristic acid, 26.9% by weight of palmitic acid, 10.65% by weight of stearic acid, and olein when the total amount of fatty acids is 100% by weight. The acid is 20.9% by weight.

<Composition of transparent bar soap>
Palm nuclear fatty acid 15.8 (wt%)
Palm fatty acid 5.3
Palm fatty acid 6.0
Stearic acid 1.5
Oleic acid 1.5
28% sodium hydroxide 17.7
Ethanol 18.0
Glycerin 7.1
Sorbitol 1.0
Sodium Cocoyl Glutamate 3.0
Etidronic acid 4Na 0.1
Honey 20.0
Appropriate amount of water
Total 100.0% by weight.

Example 6
A transparent soap bar having the following composition was prepared according to the method described in Experimental Example 1. The fatty acid composition of the fatty acid soap contained in the transparent solid soap is as follows. When the total amount of fatty acids is 100% by weight, 29.2% by weight of lauric acid, 10.65% by weight of myristic acid, 26.9% by weight of palmitic acid, stearin 10.65% by weight of acid and 22.6% by weight of oleic acid.

<Composition of transparent bar soap>
Lauric acid C12 8.8 (wt%)
Myristic acid C14 3.2
Palmitic acid C16 8.1
Stearic acid C18 3.2
Oleic acid C18F1 6.8
28% sodium hydroxide 17.7
Ethanol 18.0
Glycerin 7.0
Sorbitol 1.0
Sodium Cocoyl Glutamate 3.0
Etidronic acid 4Na 0.2
Honey 15.0
Appropriate amount of water
Total 100.0% by weight.

Claims (12)

(A) Fatty soap, (B) polyhydric alcohol, (C) honey, and (D) a frame-kneaded transparent solid soap containing an aqueous solvent as essential components, and the amount of honey blended is 15 to 15 A transparent solid soap kneaded in a frame, characterized by being 25% by weight. (A) Fatty acids constituting the fatty acid soap are at least lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid, and the blending ratio of lauric acid and stearic acid in the total amount (100% by weight) of the fatty acid is respectively The frame-kneaded transparent solid soap according to claim 1, characterized by being 20 to 40% by weight and 5 to 15% by weight. The blended transparent soap bar according to claim 2, wherein the blending ratio of lauric acid and stearic acid is 25 to 35 wt% and 5 to 12 wt%, respectively. The blended ratio of lauric acid and stearic acid is 28 to 34% by weight and 9 to 11% by weight, respectively. The frame-kneaded transparent solid soap according to any one of claims 2 to 4, wherein the blending ratio of oleic acid is 10 to 30% by weight. The blended transparent soap bar according to any one of claims 2 to 4, wherein the blending ratio of oleic acid is 15 to 25% by weight. The blended transparent solid soap according to any one of claims 2 to 4, wherein the blending ratio of oleic acid is 19 to 23% by weight. The framed transparent solid soap according to any one of claims 2 to 7, wherein the blending ratio of myristic acid and palmitic acid is 5 to 15% by weight and 20 to 40% by weight, respectively. The framed transparent solid soap according to any one of claims 2 to 7, wherein the blending ratio of myristic acid and palmitic acid is 8 to 12% by weight and 20 to 32% by weight, respectively. 8. The framed transparent solid soap according to claim 2, wherein the blending ratio of myristic acid and palmitic acid is 9 to 11% by weight and 24 to 29% by weight, respectively. The blended amount of honey is 15 to 20% by weight in terms of the charged amount, and the frame-kneaded transparent solid soap according to any one of claims 1 to 10. It is a manufacturing method of the frame-kneaded transparent solid soap as described in any one of Claims 1-11, Comprising: In the formwork which poured the transparent saponification glue prepared by mixing all the components of (A)-(D). A production method comprising cooling at 8 to 13 ° C. for 3 hours or more to solidify the transparent saponified glue.

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