JP2000309795A - Bar soap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bar soap which does not leave behind thin fragments of solid soap on the inner surface of a molding container by compounding a fatty acid soap, a nonionic surfactant, an inorganic salt and a silicone in a specified ratio. SOLUTION: This bar soap is prepared by compounding (A) 20-50 wt.% fatty acid soap, (B) 1-15 wt.% nonionic surfactant, (C) 0.1-5 wt.% inorganic salt and (D) 0.1-5 wt.% silicone. Before poured into a molding container (a mold), the melt is preferably whipped to a vol. fraction of air bubbles of 10% or higher. Preferably, ingredient A contains an alkali metal salt of an 8-22C saturated fatty acid soap, especially a sodium salt, in a content of 80% or higher, still preferably contains at least 25 wt.% lauric acid soap. Ingredient B is preferably a compound having a polyoxyethylene group of which the average number of ethylene oxide units is 6-150. Sodium chloride is preferable as ingredient C. Dimethylsilicone and methylphenylsilicone are preferable as ingredient D.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a framed soap.

[0002]

2. Description of the Related Art As a framed soap which is hard to crack, does not swell, contains bubbles at a high volume fraction, and can be manufactured with a productivity comparable to a mechanically milled soap, 20 to 50% by weight of a fatty acid soap and 1 to 50% by weight. A framed soap containing 15% by weight of a nonionic surfactant and 0.1 to 5% by weight of an inorganic salt has been proposed (JP-A-10-168494).

[0003] This frame-milling soap is prepared by melting a mixture of a fatty acid soap and a nonionic surfactant and an inorganic salt in a specific ratio in the presence of water, and pouring the melt into a mold to cool. Can be solidified in a short time.
Moreover, the melt of the frame-kneaded soap can be easily aerated by an ordinary whipping apparatus, and furthermore, the bubble-containing melt can be poured into a mold, cooled and solidified in a short time as it is. .

[0004]

However, the framed soap disclosed in Japanese Patent Application Laid-Open No. 10-168494 is
Japanese Patent Application No. 11-019052 (paragraphs 0006 to 0)
007 and 0010 to 0012 and FIGS. 1 and 2), when the plastics container is filled and solidified and taken out of the container, a thin piece of the solidified framed soap is formed on the inner surface of the molding container. There is a problem of remaining. In particular, the tendency is strong when bubbles are contained in the frame kneading soap at a high volume fraction.

[0005] The present invention relates to a solidified frame kneading soap disclosed in Japanese Patent Application Laid-Open No. 10-168494, in which the solidified frame kneading soap is filled in a resin-made molding container, solidified, and taken out of the molding container. The purpose of the present invention is to prevent flakes from remaining on the inner surface of the molded container.

[0006]

The above-mentioned object is achieved by adding silicone to the above-mentioned framed soap in a specific range.

That is, the present invention provides the following components (a) to
(D): (a) 20 to 50% by weight of a fatty acid soap; (b) 1 to 15% by weight of a nonionic surfactant; (c) 0.1 to 5% by weight of an inorganic salt;
And (d) a framed soap containing 0.1 to 5% by weight of silicone.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The framed soap of the present invention comprises component (a) a fatty acid soap (20 to 50% by weight), component (b) a nonionic surfactant (1 to 15% by weight) and component (c). )
In addition to the inorganic salt (0.1 to 5% by weight), silicone (0.1 to 5% by weight) is contained as a component (d) having a releasing effect. Therefore, the frame kneading soap of the present invention is hard to be cracked, is hard to be swollen, can contain bubbles at a high volume fraction, can be manufactured with a productivity comparable to mechanical kneading soap, and can be made of plastics (for example, After being solidified in a molding container such as a capsule type or a cup type (made of polypropylene resin), it can be taken out from the container so that no flakes of the framed soap remain on the inner surface of the molding container.

Further, the solidification rate of the soap of the present invention can be further increased by whipping (aeration treatment) before pouring the melt into a molding container (mold). Therefore, when the bubble-containing melt in the whipped state is poured into a mold, it can be solidified without phase separation.

In this case, the volume fraction of the bubbles is preferably at least 10%, more preferably at least 30%, in consideration of the solidification speed, hardness, and ease of dissolution of the soap.
In addition, the volume fraction of bubbles is preferably 80% or less from the viewpoint of the strength of the obtained soap.

The size of the bubbles is preferably 80 μm or less, more preferably 60 μm or less, in order to prevent the frame-kneaded soap from being excessively melted and to prevent the soap from spreading. Here, the lower limit of the average bubble diameter is not particularly limited, but when a normal industrial whip machine is used, it is preferably 10 μm in consideration of productivity.
m, more preferably 20 μm or more.

As the gas used in the aeration process, air, nitrogen gas or the like can be appropriately selected and used.

[0013] Further, when whipping is performed as described above, the appearance of the framed soap can be made excellent white without using a whitening agent such as titanium oxide. In addition, a favorable pale tone can be obtained even when colored. Furthermore, the fragrance at the time of use becomes good, and the amount of fragrance used can be reduced. In addition, the inherent properties of the frame-kneaded soap that are hard to crack and hard to spread are not impaired.

The fatty acid soap of component (a) used in the present invention includes alkali metal salts (for example, sodium salt, potassium salt, etc.), ammonium salts and alkanolamine salts of saturated or unsaturated fatty acids having 8 to 22 carbon atoms. For example, monoethanolamine salt, diethanolamine salt,
And the like selected from the group consisting of triethanolamine salts). Above all, if the proportion of the saturated fatty acid soap in the fatty acid soap of the component (a) is low, the solidification of the soap becomes difficult.
It is preferable to use an alkali metal salt of a saturated fatty acid, particularly a sodium salt, for 0% by weight or more. Here, in order to improve the foamability of the framed soap, it is preferable that at least 25% by weight of the fatty acid soap of the component (a) is lauric acid soap.

Fatty acids constituting the fatty acid soap of the component (a) include vegetable oils or animal oils (for example, palm oil, palm kernel oil, coconut oil, castor oil, soybean oil, cottonseed oil,
Rapeseed oil, sunflower oil, tallow, lard, etc.). Among them, palm kernel oil or coconut oil is preferred. In this case, these fats and oils are preferably subjected to a hydrogenation treatment in order to reduce the amount of unsaturation.

The fatty acid soap of the component (a) can be produced by directly saponifying the above fats and oils or by neutralizing free fatty acids prepared separately.

The content of the fatty acid soap of the component (a) in the framed soap should be at least 20% by weight in consideration of foaming property and solidification property. On the other hand, if the content is too large, the content of other components is relatively reduced too much and desired characteristics cannot be obtained. Preferably, 25
~ 45% by weight.

The nonionic surfactant of the component (b) used in the present invention is used for accelerating the solidification of the soap, and may be appropriately selected from known nonionic surfactants. Can be used. Among them, as a preferred nonionic surfactant, an average EO as a hydrophilic group is used.
Compounds having a polyoxyethylene group having an addition mole number of (ethylene oxide) of 6 to 150, preferably 10 to 50 can be mentioned. Among such compounds,
10 to 18 carbon atoms, preferably 12 to 14 carbon atoms as a hydrophobic group
And an HLB value of 8 or more, preferably 10 or more. For example, emanone 1112 (monolauric acid (EO addition mole number = 12) polyethylene glycol, manufactured by Kao Corporation) having an HLB of 14.3, and emulgen 123 having an HLB of 16.9.
P (polyoxyethylene (EO addition mole number = 23) lauryl ether, manufactured by Kao Corporation), Emarex 730 having an HLB of 18 (polyoxyethylene (EO addition mole number = 3)
0) lauryl ether, manufactured by Nippon Emulsion Co., Ltd.) and the like.

The content of the nonionic surfactant of the component (b) in the framed soap is 1 to 15% by weight, preferably 2 to 15% by weight.
8% by weight.

The ratio of the fatty acid soap of the component (a) to the nonionic surfactant of the component (b) is such that if the fatty acid soap is too large relative to the nonionic surfactant, the effect of the addition becomes difficult, If the amount is too small, sufficient hardness of the soap cannot be realized, so that it is preferably in the range of 30: 1 to 2: 1, more preferably 20: 1 to 5: 1.

The inorganic salt of the component (c) used in the present invention is to impart good fluidity to the soap when the soap is poured into a mold. Preferred inorganic salts include salt.

The content of the inorganic salt of the component (c) in the framed soap is from 0.1 to 5% by weight, preferably from 1 to 4% by weight, from the viewpoint of the fluidity and foamability of the soap.

The silicone of the component (d) used in the present invention is a component for improving the releasability of the frame-kneaded soap when it is removed from the molding container, and includes dimethyl silicone (for example, KF-96A, KF-96H). (Shin-Etsu Silicone Co., Ltd.)) or methylphenyl silicone (for example, KF5
3, KF54 (Shin-Etsu Silicone Co., Ltd.)) can be preferably used. The viscosity of silicone is 10 to 5
000 mm ² / s (25 ° C.), especially 50 to 1000 mm ²
/ S (25 ° C.) is preferred.

If the content of the silicone of the component (d) in the frame kneading soap is too small, a thin film of the frame kneading soap easily adheres to the inner surface of the resin-made molding container.
% By weight is required. On the other hand, if the content is too large, the foaming power of the soap deteriorates. The preferred content is 0.5 to 2% by weight.

The framed soap of the present invention further comprises a component (a)
In order to increase the stability of bubbles existing in the melt of (d) to (d), it is preferable to contain a polyol (preferably glycerin). If the content of such polyols in the framed soap is too small, the stabilization of air bubbles is not sufficient, and if the content is too large, the soap is hardly solidified, so that it is preferably 5 to 40% by weight, more preferably 10 to 40% by weight. ３０30% by weight.

In the case of the framed soap of the present invention,
In order to prevent the liquid phase from separating due to breakage of the bubble-containing melt in the whipped state poured into the mold, a hydroxy acid ester surfactant, a monoglyceride surfactant, a sucrose ester surfactant, It is preferable to add a lactic acid ester-based surfactant. Among them, it is preferable to add a lactic acid ester-based surfactant. If the content of these ester-based surfactants in the framed soap is too small, the foam easily breaks, and if it is too large, the production cost exceeds the practical level. More preferably, it is 1 to 5% by weight.

Further, it is preferable to add a non-soap type anionic surfactant to the framed soap of the present invention in order to improve foaming property at low temperature and dispersibility of scum.
Such anionic surfactants include acyl isethionate, polyoxyethylene ether sulfate, PO
E ether carboxylate, acyl methyl taurine salt, acyl sarcosinate, alkyl sulfosuccinate,
Monoalkyl phosphorus salts, acyl-β-alanine salts and the like can be used. The content of the non-soap-based anionic surfactant in the framed soap is too small or too large to improve the foaming property at low temperatures and the dispersibility of scum. -25% by weight, more preferably 2-15% by weight.

Further, it is preferable to blend free fatty acids into the framed soap of the present invention for mildening and improving foaming. Hardened coconut oil fatty acids and the like can be used as such free fatty acids. If the content of the free fatty acid in the framed soap is too small, mildness and improvement of foaming are not sufficient, and if it is too large, foaming does not occur, so that it is preferably 0.2 to 9% by weight, more preferably 0.5 to 9%. 5
% By weight.

Here, the ratio of the fatty acid soap to the free fatty acid of the component (a) is preferably 99: if the free fatty acid is too small, the skin feel is not sufficiently improved, and if the free fatty acid is too large, the soap becomes too soft. 1-4: 1, more preferably 2
The range is from 0: 1 to 5: 1.

The framed soap of the present invention contains a plant of the genus Polyanthus (Polianthea.L) (preferably tuberose) in order to improve the smoothness of the skin after use.
The resulting natural acidic polysaccharide (preferably tuberose polysaccharide) is preferably added to the framed soap at 0.001 to 0.1% by weight.

It is preferable to mix organic acids other than fatty acids in the framed soap of the present invention in order to stabilize the scent. Such organic acids include lactic acid, gluconic acid and the like. If the content of the organic acid in the framed soap is too small, a sufficient effect cannot be obtained, and if the content is too large, a corresponding effect cannot be expected. Therefore, the content is preferably 0.01 to 3% by weight, more preferably 0% by weight. .1 to 1% by weight
It is.

In addition, water is required to be added to the framed soap of the present invention so that the components (a) to (d) and other components to be added as required can be uniformly melted. There is. Usually, 25 to 40% by weight of water is blended. This water is contained in the water immediately after the production in almost the same ratio since the frame soap of the present invention rapidly solidifies, but gradually decreases with drying.

Further, in addition to the above-mentioned components, known additives such as antibacterial agents, fragrances, pigments, dyes, oils and the like used in conventional framed soaps are added to the framed soaps of the present invention. And other hypostimulants can be added.

The framed soap of the present invention can be produced by a conventional method. For example, the components (a) to (d) and, if necessary, other components are heated and stirred at 60 to 80 ° C. and melted. Alternatively, it can be produced by dissolving, pouring it as it is into a mold, cooling and drying.

In particular, in the case of producing a lightweight (floating) soap containing bubbles, the obtained melt is subjected to an aeration treatment with a household or industrial whip device to contain bubbles, thereby obtaining the soap. It can be manufactured by placing the melt containing bubbles in a mold, cooling and solidifying the melt, and drying it if necessary.

Examples of the mold include a pair of upper and lower capsule mold containers 1 made of plastics molded bodies 2 and 3 shown in FIG. 1 and a cup mold container 20 shown in FIG.

[0037]

EXAMPLES Examples 1 to 7 and Comparative Examples 1 and 2 The components of the formulations shown in Tables 1 to 4 were each heated to 70 ° C. and melted. (%) (See Tables 1 to 4), and whipped by applying aeration treatment.
Was filled in a capsule-shaped molding container as shown in Table 1 and allowed to cool and solidify to prepare a framed soap containing bubbles.

The temperature of the melt during the whipping was 5 to 8 ° C., and the solidification starting temperature was about 65 ° C. In addition, when allowing to cool and solidify 100 ml of the bubble-containing melt, it was allowed to stand at room temperature for 30 minutes to cool to 40 ° C. or lower.

Next, the capsule-type forming container was opened and the solidified frame kneading soap was taken out, and the inner surface area of the container covered with the flaky, irregular-shaped frame kneading soap remaining on each container inner surface was measured. . Specifically, a rectangle capable of covering the irregular shape of the remaining framed soap was assumed, and the lengths of the major axis and the minor axis were measured with a ruler, and the product thereof was defined as the area.
When there are a plurality of such rectangles, the areas of the individual rectangles are obtained and summed up, and the total area (total area of the residue attached)
I asked. The results are shown in Tables 1 to 4.

If the total area of the adhered residue is 3 cm ² or less, it is judged that there is no practical problem, and 3 cm 2
If it exceeds ^2, it was judged to be rejected as having a practical problem. As a result, the frame-containing soaps of Examples 1 to 7 containing silicone could be taken out of the capsule-shaped molded container without practical problems. On the other hand, the frame-milled soaps of Comparative Examples 1 and 2 containing no silicone had a practically problematic level of residual amount on the inner surface of the container when taken out of the capsule-shaped container.

From the results of Example 6, when the viscosity of the silicone was relatively high at 10,000 mm ² / s, the total area of the adhered residue tended to increase. Therefore, it is understood that the viscosity of the silicone is preferably lower than 10000 mm ² / s.

[0042]

Table 1 (% by weight) Example Comparative Example Component 1 Sodium 1 Laurate 14.0 14.0 Sodium Myristate 14.0 14.0 Polyethylene glycol laurate (12 moles of EO added) 8.4 4 Sodium chloride 0.9 0.9 Dimethylpolysiloxane (50 mm ² / s) 0.7-Glycerin 15.5 15.5 Sorbitol 5.7 5.7 Lauric acid 0.4 0.4 Myristic acid 0.40 .4 Perfume 0.7 0.7 Pigment 0.3 0.3 Stabilizer 1.0 1.0 Water 38.0 38.7 Volume fraction containing bubbles (%) 30 30 Total area of adhered residue (cm ²⁾ ) 0.3 5.5

[0043]

(% By weight) Example Comparative Example Component 2 Sodium 2 Laurate 15.0 15.0 Sodium Myristate 17.0 17.0 Polyethylene Glycol Laurate 5.0 5.0 (Number of moles of EO added 12 mol) ) Sodium chloride 1.5 1.5 Dimethyl polysiloxane (50 mm ² / s) 2.0-Sodium coconut oil fatty acid ethyl ester sulfonate 3.0 3.0 Sodium lauroyl lactate 1.0 1.0 Glycerin 14.0 14 3.0 Myristic acid 3.0 3.0 Stabilizer 1.5 1.5 Titanium oxide 0.3 0.3 Fragrance 0.5 0.5 Water 36.2 38.2 Bubbles-containing volume fraction (%) 50 50 Residual rate total area (cm ² ) 0.1 8.2

[0044]

Table 3 (% by weight) Example component 3 4 5 6 Sodium laurate 16.0 16.0 16.0 16.0 Sodium myristate 16.0 16.0 16.0 16.0 Polyethylene glycol laurate 4 4.0 4.0 4.0 4.0 (number of moles of EO added: 12 mol) Sodium chloride 1.0 1.0 1.0 1.0 Dimethylpolysiloxane (5 mm ² / s) 1.0 − −−Dimethylpoly Siloxane (500 mm ² / s)-1.0--Dimethyl polysiloxane (5000 mm ² / s)--1.0-Dimethyl polysiloxane (10000 mm ² / s)---1.0 Palm oil fatty acid ethyl ester sulfonic acid Sodium 3.0 3.0 3.0 3.0 Sodium lauroyl lactate 2.0 2.0 2.0 2.0 Glycerin 9.0 9.0 9.0 9.0 9.0 Sorbitol 10 0.0 10.0 10.0 10.0 Myristic acid 4.0 4.0 4.0 4.0 Stabilizer 1.5 1.5 1.5 1.5 Titanium oxide 0.3 0.3 0.0. 3 0.3 Perfume 0.5 0.5 0.5 0.5 Water 31.7 31.7 31.7 31.7 Volume fraction containing bubbles (%) 35 35 35 35 Residual rate Total area (cm ² ) 1.4 0.2 0.6 3

[0045]

Table 4 (% by weight) Example component 7 Sodium laurate 15.0 Sodium myristate 15.0 Polyethylene glycol laurate 2.0 (Number of moles of EO added: 12 mol) Sodium chloride 1.2 Dimethylpolysiloxane (100 mm ²⁾ / S) 0.5 Sodium coconut oil fatty acid ethyl ester sulfonate 2.0 Sodium lauroylmethyltaurine 1.0 Sodium lauroyl lactate 4.0 Glycerin 11.0 Sorbitol 6.0 Lauric acid 1.8 Myristic acid 1.8 Stabilization Agent 1.5 Tuberose-derived polysaccharide 0.1 Eucalyptus extract 0.1 Titanium oxide 0.3 Perfume 0.5 Water 36.2 Bubbles-containing volume fraction (%) 20 Residual rate Total area (cm ² ) 0.2

[0046]

According to the present invention, a frame kneading soap which is hard to crack, does not spread easily, can easily contain air bubbles at a high volume fraction, and has a productivity comparable to a mechanical kneading soap is used. After being filled and solidified in a molding container made of plastic, the flakes of the framed soap can be taken out from the molding container such that the flakes do not adhere to and remain on the inner surface of the molding container.

[Brief description of the drawings]

FIG. 1 is a perspective view of a capsule-shaped molded container for filling the frame-kneaded soap of the present invention.

FIG. 2 is a perspective view of a cup-shaped container for filling the frame-kneading soap of the present invention.

[Explanation of symbols]

1 molded container, 2,3 molded body, 4,5 flange,
6, 7 tab, 8 heat seal part, 9 filling port, 10
Seal part, 11, 12 step, 13 gap

Claims (2)

[Claims] 1. The following components (a) to (d): (a) fatty acid soap 20 to 50% by weight; (b) nonionic surfactant 1 to 15% by weight; (c) inorganic salt 0.1 ~ 5% by weight;
And (d) 0.1% to 5% by weight of silicone. 2. The framed soap according to claim 1, which contains at least 10% by volume of air bubbles.