JP2002114994A - Milled soap composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a milled soap composition which can inexpensively produce milled solid soaps with the use of the conventional milled soap production facilities without adversely affecting the basic performance such as lathering properties and a feeling of use in spite of having increased the water content of several % to about 10% in the conventional solid milled soap by a water content of more than 15%. SOLUTION: The milled soap composition is constituted of component (a) of a fatty acid soap (21-81 wt.%), component (b) of water (18-45 wt.%), component (c) of a polyoxyalkylene type nonionic surface active agent (0.5-7 wt.%), component (d) of sodium chloride (0.4-7 wt.%), and component (e) of a polyoxyalkylene glycol (0.1-20 wt.%).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a milled soap composition having a relatively high water content. More specifically, the present invention relates to a mechanically-milled soap composition which can be produced using conventional mechanically-milled soap production equipment despite its relatively high water content.

[0002]

2. Description of the Related Art One of the great advantages of general-purpose solid soaps, especially machine-kneaded solid soaps, is that they are inexpensive. However, they are required to be provided at a lower cost, and therefore have high foaming properties. Since the soap content derived from palm kernel oil and coconut oil is relatively expensive, using relatively inexpensive oil and fat raw materials such as beef tallow and palm oil, and increasing the proportion of fatty acids obtained from them, Attempts have been made to replace some of the soap with inexpensive fillers (calcium carbonate, talc, etc.) and to increase the water content.

[0003] Among these means, it is effective to increase the water content of the soap composition in terms of greatly reducing the production cost from the viewpoint of raw material cost. For example, Tokiohei 6
In the case of 503122, the water content of the soap composition is increased by forming a three-dimensional mesh structure from elongated crystals of neutralized fatty acids. In addition, Japanese Patent Translation
In the case of 0851, a soap composition having a three-dimensional mesh structure of elongated crystals of neutralized fatty acids is extruded in a semi-molten state from a plotter to increase the water content of the soap composition.

[0004]

However, beef tallow and palm oil have a large amount of saturated fatty acid residue components of C16 or more which do not contribute to foaming, and the foaming property of the soap composition is impaired when the fatty acid composition ratio is increased. In addition, there is a problem that when a large amount of the extender is added, the feel when using the soap composition is reduced, and the use of the soap composition is greatly reduced.

[0005] Further, Japanese Patent Application Laid-Open Publication No.
In the case of -503122, it is premised that it is manufactured by a frame kneading method which is not suitable for industrial mass production.
It is difficult to reduce the manufacturing cost. Tokiohei 7-
In the case of No. 500851, although the conventional water content of about several percent is increased to about 15% to about 40%, it can be manufactured by applying a mechanical kneading method instead of a frame kneading method. It cannot be manufactured with conventional soap manufacturing equipment, and it is necessary to introduce a new manufacturing equipment capable of extruding a soap composition in a semi-molten state, resulting in an increase in manufacturing cost.

[0006] As described above, at present, it is impossible to industrially produce a machine-kneaded soap composition having an increased water content by directly applying the conventional machine-kneaded soap manufacturing apparatus and manufacturing conditions. .

According to the present invention, the basic performance such as foaming property and feeling of use is not impaired despite the fact that the water content of several percent to 10% of ordinary bar soap is increased to a water content exceeding 15%. It is another object of the present invention to provide a machine-milled soap composition which can be manufactured at low cost using a conventional machine-milled soap manufacturing facility.

[0008]

The present invention comprises the following components (a) to (e): (a) 21 to 81% by weight of a fatty acid soap; (b) 18 to 45% by weight of water (c) Polyoxyalkylene Soap composition containing 0.5 to 7% by weight of a nonionic surfactant of the type; (d) 0.4 to 7% by weight of sodium chloride; and (e) 0.1 to 20% by weight of polyoxyalkylene glycol. Offer things.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The machine-milled soap composition of the present invention comprises:
Component (a) fatty acid soap, component (b) water, component (c) polyoxyalkylene-type nonionic surfactant, component (d)
It contains sodium chloride and component (e) polyoxyalkylene glycol in specific proportions. For this reason,
Even if the water content is increased from the case of a conventional general solid machine-milled soap (several% to about 10%) to a water content exceeding 15%, the conventional performance without impairing the basic performance such as foaming property and feeling of use can be obtained. It can be manufactured inexpensively using a machine kneading soap manufacturing facility.

The fatty acid soap of component (a) used in the present invention includes alkali metal salts (for example, sodium salts, potassium salts, 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).

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

[0012] When palm kernel oil and palm stearin oil are used in combination, their use ratio is preferably from 2: 8 to
The ratio is 7: 3, more preferably 3: 7 to 6: 4.

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

If the content of the fatty acid soap of the component (a) in the machine-milled soap composition is too small, the foaming property and the solidification property decrease, while if it is too large, the content of the other components relatively decreases. Since it is difficult to obtain the desired properties, the content is at least 21% by weight and at most 81% by weight, preferably 35 to 75% by weight.

As the water of the component (b), it is preferable to use desalted purified water. If the content in the machine-milled soap composition is too small, the effect of reducing the production cost is not sufficient, and if it is too large, it is difficult to solidify and the productivity decreases, so at least 18% by weight and at most 45% by weight , Preferably in the range of 23 to 40% by weight.

The polyoxyalkylene-type nonionic surfactant of the component (c) is used for accelerating the solidification of the soap, and is appropriately selected from known polyoxyalkylene-type nonionic surfactants. Can be used. Among them, preferred nonionic surfactants have an average number of moles of added EO (ethylene oxide) of 6 to 15
Compounds having 0, preferably 10 to 50 polyoxyethylene groups can be mentioned. Among such compounds, a hydrophobic group having 10 to 18 carbon atoms, preferably 1
It has 2 to 14 alkyl groups and 8 or more, preferably 1
Compounds having an HLB value of 0 or more can be mentioned. For example, Emanon 1112 with an HLB of 13.7
(Monolauric acid (EO added mole = 12) polyethylene glycol, manufactured by Kao Corporation), emulgen 123P having an HLB of 16.9 (polyoxyethylene (EO added mole =
23) Lauryl ether, manufactured by Kao Corporation), Emarex 730 having an HLB of 18 (polyoxyethylene (EO added mole number = 30) lauryl ether, manufactured by Nippon Emulsion Co., Ltd.), and Rhodol TW-L120 having an HLB of 16.7.
(Monolauric acid (number of moles of EO added = 30) polyoxyethylene sorbitan, manufactured by Kao Corporation) and the like can be mentioned as preferable examples.

The content of the polyoxyalkylene type nonionic surfactant of the component (c) in the milled soap composition is as follows:
If the amount is too small, the soap becomes soft soap and the productivity is reduced. If the amount is too large, the raw material cost increases.
At most 7% by weight, preferably 1 to 5% by weight.

The weight ratio ((a) / (c)) of the fatty acid soap of the component (a) to the polyoxyalkylene type nonionic surfactant of the component (c) is too large for the latter. The effect of the addition is difficult to appear, and if the amount is too small, sufficient hardness of the soap cannot be realized.
２2: 1, more preferably 25: 1 to 5: 1.

The component (d), sodium chloride, is used for imparting practically sufficient hardness to the mechanically milled soap composition.

If the content of sodium chloride as the component (d) in the machine-milled soap composition is too small, the hardness of the soap composition becomes insufficient, and if it is too large, the foaming property is reduced. It is in the range of at most 7% by weight, preferably 0.7 to 5% by weight.

The polyoxyalkylene glycol of the component (e) is used for imparting good water retention to the machined soap composition. As the polyoxyalkylene glycol, polyethylene glycol having a weight average molecular weight of 200 to 25,000 is preferably exemplified.

If the content of the polyoxyalkylene glycol of the component (e) in the machine-milled soap composition is too small, the water retention of the soap composition is reduced, and if it is too large, the solidification property of the soap composition is reduced. , At least 0.1% by weight and at most 20% by weight, preferably in the range of 0.3 to 15% by weight.

[0023] A non-soap anionic surfactant may be added to the mechanically milled soap composition of the present invention in order to improve foaming properties at low temperatures and dispersibility of scum. Free fatty acids may be added for mildening and improving foaming. In addition to the above-mentioned components, known additives such as those used in conventional toilet soaps, for example, antibacterial agents,
Flavors, pigments, dyes, oils, other hypoallergenic agents and the like can be added.

The machine-milled soap composition of the present invention can be produced in the same manner as a conventional machine-milled soap. For example, a soap neat is produced by saponifying an oil or fat or by completely neutralizing a fatty acid obtained by decomposing an oil or fat, and then adding components (b) to (e) to the neat.
The resulting mixture is mixed, dried if necessary, and the resulting mixture is kneaded with other components, if necessary, extruded and stamped to obtain the mechanically kneaded soap composition of the present invention.

[0025]

EXAMPLES Examples 1 to 6 and Comparative Examples 1 to 3 Soap neats were prepared so as to have the compositions shown in Tables 1 and 2,
The obtained soap neat was made into a ribbon-like soap base using a chilling roll. Extrude this base with a plotter,
Solid soap (size: 1.5 × 4 ×
6 cm). In the case of Comparative Examples 1 and 2, since the substrate could not be extruded with a plotter (described later), the substrate was directly pressed into a mold to obtain a bar of approximately the same size.

[0026]

(Table 1) (% by weight) Example component 1 2 3 4 5 6 Sodium fatty acid ^{* 1} 68.5 58 52 62 62 62 Water 25 30 35 30 30 30 Polyethylene glycol monolaurate ^{* 2} 3 5 5 3--Polyoxyethylene lauryl Ether ^{* 3} − − − − 3 − Polyoxyethylene sorbitan monolaurate ^{* 4} − − − − − 3 Sodium chloride 1.5 2 3 2 2 2 Polyethylene glycol ^{* 5} 2 5 5 3 3 3 Table 1 and Table 2 Note * 1: Palm kernel / palm stearin = 50/50 * 2: Emanon 1112, manufactured by Kao Corporation * 3: Emulgen 123P, manufactured by Kao Corporation * 4: Leodor Doll TW-L120, manufactured by Kao Corporation * 5: PEG6000, manufactured by Kao Corporation

[0027]

(Table 2) (% by weight) Comparative example component 1 2 3 Sodium fatty acid ^{* 1} 68.5 60 63 Water 25 30 30 Polyethylene glycol monolaurate ^{* 2} − 55 Polyoxyethylene lauryl ether ^{* 3} − − − Polyoxyethylene sorbitan monolaurate ^{* 4} − − − Sodium chloride 1.5 − 2 Polyethylene glycol ^{* 5} 5 5 −

(Evaluation) The obtained machine-milled solid soap was evaluated for "manufacturability", "water retention", "foaming" and "feeling of use" described below. Table 3 shows the obtained results.

"Manufacturability" evaluation test Observe the state when the soap base is extruded from the plotter,
The sample was evaluated as “◎” when it exhibited the same extrudability as ordinary soap, “○” when it was extrudable, and “x” when it was soft and could not be extruded.

Evaluation Test of "Water Retention" The obtained solid soap was allowed to stand for 1 week in an environment of a temperature of 20 ° C. and a humidity of 40%, and if the weight loss was within 10%, “O” exceeded 10% The case was evaluated as "x".

[Evaluation test for "foaming property"] The obtained mechanical kneaded soap was watered and rubbed with both hands to foam. If the foaming at that time is equal to or higher than the foaming when using a commercially available mechanical kneading soap (white, manufactured by Kao Corporation) having a water content of 10% by weight, it is judged as "O", and if inferior, it is evaluated as "X". Was evaluated.

"Evaluation of use feeling" evaluation test The obtained solid soap was compared with a commercially available mechanical kneading soap (white, manufactured by Kao Corporation) for the feeling of use. And whitening of the skin) were evaluated as “x”.

[0033]

[Table 3] Example Comparative example Evaluation items 1 2 3 4 5 6 1 2 3 Manufacturability ◎ ○ ○ ○ ○ ○ × × ○ Water retention ○ ○ ○ ○ ○ ○ ○ ○ × Foaming ○ ○ ○ ○ ○ ○ ○ ○ ○ Use Feeling ○ ○ ○ ○ ○ ○ ○ ○ ○

From Table 3, it can be seen that the components (a) to (e) in a predetermined range
It can be seen that the bar soaps of Examples 1 to 6 obtained good results for all evaluation items.

On the other hand, it can be seen that both the solid soap of Comparative Example 1 containing no component (c) and the solid soap of Comparative Example 2 containing no component (d) had a problem in productivity. In addition, in the case of the solid soap of Comparative Example 3 containing no component (e), it can be seen that there was a problem in water retention.

[0036]

EFFECTS OF THE INVENTION The mechanically milled soap composition of the present invention has improved foaming properties and use despite the fact that the moisture content of several percent to 10% in a normal machined solid soap is increased to a moisture content exceeding 15%. It can be manufactured inexpensively using conventional mechanical kneading soap manufacturing equipment without impairing basic performance such as feeling.

Claims (1)

[Claims] 1. The following components (a) to (e): (a) 21 to 81% by weight of a fatty acid soap; (b) 18 to 45% by weight of water (c) Polyoxyalkylene type nonionic surfactant 0 (D) 0.4 to 7% by weight of sodium chloride; and (e) 0.1 to 20% by weight of a polyoxyalkylene glycol.