JPH05271698A - Solid soap composition - Google Patents

Abstract

PURPOSE:To provide a solid soap which foams well even when cold water is used, allows no crack to occur, and does not swell nor crumbles even when warm water is used by compounding a sodium soap, glycerol and magnesium oxide and/or calcium oxide. CONSTITUTION:A solid soap compsn. comprises a sodium soap (A), glycerol (B), and magnesium oxide and/or calcium oxide (C). The addition of a potassium soap (D) to the compsn. enhances the effects described above. Pref. wt. ratios of B/(A+D) and A/D are 98.5/1.5 to 94/6 and 99/1 to 70/30, respectively, and the content of C based on the compsn. is 0.05-2.0wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a good foaming property even when used in cold water, and is free from dripping, melt-down and cracking.
Moreover, the present invention relates to a solid soap composition having a good stamping property during production.

[0002]

2. Description of the Related Art Solid soap is produced by reacting mixed fats such as beef tallow and coconut oil with an aqueous solution of caustic soda or beef tallow,
It is produced by blending a perfume, a coloring agent, etc. in a soap base obtained by neutralizing mixed fatty acids obtained by decomposing coconut oil with caustic soda, but in recent years, so-called super fat soap containing free fatty acids. Is the mainstream.

It is known that the solubility and foaming properties of bar soaps are greatly influenced by the temperature at which it is used. Particularly, sodium soap which is usually used is good when it is used at room temperature or warm water, but when it is used in cold water, the solubility is decreased and the foaming is deteriorated. For this reason, when used in winter, tap water, etc., there arises a problem that no foaming occurs and the cleaning effect is poor. Further during use,
Soap may crack. As a method of solving such a drawback in using cold water, a method of adding glycerin to sodium soap is known. However, although this method improves the solubility and foaming when using cold water, when it is used with warm water in the bathroom, it causes another drawback that it causes dripping and melting.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a solid soap which has a good foaming property even when used in cold water, does not crack, and does not cause dripping or melting when used in warm water. Especially.

[0005]

[Means for Solving the Problems] In such an actual situation, as a result of intensive studies by the present inventors, by adding glycerin to sodium soap and further compounding a specific metal oxide, foaming occurs even in the use of cold water. The present invention has been completed by finding out that a solid soap which is good in quality, does not cause cracking, and does not cause swelling or melting even when used in warm water is obtained.

That is, the present invention comprises the following components (a) and (b):
And (c) (a) sodium soap (b) glycerin (c) magnesium oxide and / or calcium oxide.

The solid soap composition of the present invention is mixed with glycerin during the production of sodium soap to prepare a soap base,
It can be manufactured by adding and mixing magnesium oxide and / or calcium oxide, kneading and stamping. The amount of glycerin to be added at this time is preferably 1.5 to 6.0% by weight in the soap matrix. Specifically, for example, animal fats and oils typified by beef tallow, sheep fat, and the like; vegetable oils and fats typified by coconut oil, palm oil, palm kernel oil, soybean oil, olive oil, cottonseed oil, etc., alone or in a mixture, are saponified with caustic soda. The soap base is produced by adding glycerin afterwards or by neutralizing each of the fatty acids obtained by decomposing these oils and fats, alone or in a mixture, with caustic soda in the presence of glycerin. Next, magnesium oxide and / or calcium oxide and, if necessary, magnesium chloride and / or calcium chloride may be added to this soap base, mixed, kneaded, extruded, and stamped.

The magnesium oxide and calcium oxide used in the present invention are not particularly limited, and commercially available ones can be used. Further, the particle size of these is preferably 100 μm or less, and particularly preferably 50 μm or less.

One of magnesium oxide and calcium oxide may be added to the solid soap composition of the present invention alone or in combination of both, and the total amount thereof is 0.02 to 5.0% by weight. And preferably 0.05 to
2.0% by weight, particularly preferably 0.1 to 1.0% by weight. If the amount is less than 0.02% by weight, the effect of the present invention cannot be obtained, and if the amount is more than 5.0% by weight, the solidity of the detergent during production deteriorates.

Further, magnesium chloride or calcium chloride is added to the solid soap composition of the present invention in magnesium oxide /
The weight ratio of magnesium chloride and calcium oxide / calcium chloride is 5/1 to 10/1, preferably 7
By blending so as to be / 1 to 9/1, it is possible to further improve the effect of preventing dandruff, melt-down and cracking. When magnesium chloride or calcium chloride is used in combination, the total amount of magnesium oxide and calcium oxide is preferably 0.02 to 1.0% by weight, and particularly preferably 0.05 to 0.8% by weight in the solid soap composition.

The solid soap composition of the present invention can enhance the effect of the present invention by adding not only sodium soap but also potassium soap. The potassium soap may be added as it is, but by using caustic potash in addition to caustic soda at the time of saponification, the soap base can be industrially advantageously produced. The blending ratio of sodium soap and potassium soap is preferably 99: 1 to 70:30 by weight, particularly 98: 2 to 9
0:10 is preferable. At this time, the total weight ratio of sodium soap and potassium soap and glycerin in the soap base was 9
It is preferably 8.5: 1.5 to 94: 6.

In the solid soap composition of the present invention, in addition to the above-mentioned components, a higher fatty acid, a higher fatty acid ester, a superfatting agent such as silicone, or a propylene glycol, which is a compounding ingredient of an ordinary skin cleansing agent, may be added if necessary. Moisturizers such as fragrances, fragrances, dyes, ultraviolet absorbers, antioxidants, bactericides, preservatives and the like can be added.

[0013]

EFFECT OF THE INVENTION The solid soap composition of the present invention has good foaming even when used in cold water, does not cause cracks, does not melt and dull when used in hot water, and further has a stamping during production. Good property.

[0014]

The present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

Example 1 Soaps having the compositions shown in Table 1 below were produced by a conventional method, and the foaming property in cold water, the degree of swelling, and the evaluation of swelling and cracking were carried out by the following methods. The results are shown in Table 1. (1) Foamability in cold water Each soap was hand-washed with water at 10 ° C. to evaluate its foamability. The evaluation criteria are as follows. ◎: Good foaming ○: Foaming △: Slightly bad foaming ×: Poor foaming

(2) Test of fluffiness A test piece of 1 × 1 × 5 cm of each soap is prepared and immersed in water at 40 ° C. for 1 hour. This was taken out and set on a rheometer (NRM-2010J-CW, manufactured by Fudo Kogyo Co., Ltd.), and a needle-shaped indenter was inserted into the surface of the test piece to obtain 100 g.
The distance from the surface when the drag of was obtained was measured, and the degree of fuzzy was calculated by the following formula. The larger this value is, the more remarkable the fluffiness is. Softness (mm) = (needle penetration after immersion)-(needle penetration before immersion)

(3) Evaluation of fluff Each soap was used for 2 weeks in the bathroom under the same conditions, and the state after that was visually evaluated. The evaluation criteria are as follows. ◎: No fluffy at all ○: Not very fluffy △: Slightly fluffy ×: Very fluffy

(4) Evaluation of cracks A test piece of 1 × 1 × 5 cm of each soap was prepared and immersed in water at 10 ° C. for 6 hours. This was taken out and dried at room temperature for 24 hours, and the cracked state of the sample at that time was visually evaluated. The evaluation criteria are as follows. ◎: No crack at all ○: Slightly cracked △: Cracked ×: Very cracked

[0019]

[Table 1]

Example 2 Blend composition: soap base (solid content 87%, water content 13%, fatty acid composition: beef tallow / coconut oil = 6/4) balance weight% sodium soap / glycerin / potassium soap 93/2/5 palm Oil fatty acid 7.0 Ethylenediaminetetraacetic acid disodium 0.2 Dibutylhydroxytoluene 0.1 Coloring agent (titanium oxide) 0.2 Perfume 1.0 Magnesium oxide 0.2 Magnesium chloride 0.02 According to the above composition, a conventional method is used. To prepare a mechanical kneading soap. The obtained solid soap had a good foaming property in cold water, and was free from fluff and cracks.

Claims (1)

[Claims] 1. A solid soap composition containing the following components (a), (b) and (c) (a) sodium soap (b) glycerin (c) magnesium oxide and / or calcium oxide.