JPH08239697A - Soap composition - Google Patents

Abstract

PURPOSE: To obtain a soap composition whose color and odor change little with time during storage and which is excellent in touch and moldability as well as in stability by incorporating therein specific components in addition to dibutylhydroxytoluene. CONSTITUTION: The soap composition contains (A) polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether, (B) 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof, and (C) dibutylhydroxytoluene. Component A preferably has at least two ethylene oxide units added. The amounts of the components A, B and C are preferably 0.2wt.% or more, 0.01-5.0wt.% and 0.005-0.1wt.%, respectively, based on the total amount of the soap composition. These components are incorporated in a soap base which is formed by neutralizing completely a fatty acid obtained by saponifying or decomposing a fat or fatty oil by conventional procedure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soap composition, and more particularly, it relates to a soap composition which has a small change in the color tone and odor during storage and storage and is excellent in stability, and is excellent in usability and moldability. .

[0002]

2. Description of the Related Art Soap compositions are conventionally obtained by reacting mixed fats such as beef tallow, palm oil and coconut oil with an alkali agent (caustic soda etc.) or by decomposing beef tallow, palm oil, coconut oil and the like. It is produced by mixing a soap base obtained by reacting a fatty acid with an alkali agent, and adding a fragrance, a pigment or the like as an additive component.

It is generally well known that such a soap composition, when stored for a long period of time or exposed to sunlight or room light, undergoes discoloration, deterioration, etc. and its quality deteriorates.
This is because the fragrance and excess fat added to the soap are deteriorated by oxidation, or the base of the soap is rancid.

In order to prevent such deterioration of soap quality, a method of incorporating various stabilizers such as an antioxidant and a sequestering agent is used. Examples of these stabilizers include dibutylhydroxytoluene, ethylenediaminetetraacetic acid (EDTA) or salts thereof, and among them, dibutylhydroxytoluene is useful as an antioxidant. However, this dibutylhydroxytoluene has a drawback that it is oxidized by itself, and its soap often causes discoloration (yellowing) of the soap. The soap composition has not only a function as a soap but also a color tone, an odor, and the like that have a great influence on the commercial value in terms of its product characteristics. Therefore, there has been a demand for the production of soap compositions satisfying such requirements.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. An object of the present invention is to improve the destabilizing effect of soap discoloration caused by conventional dibutylhydroxytoluene, and to improve the color tone during storage and storage. Another object of the present invention is to provide a soap composition which has a low odor change over time and is excellent in stability, and is also excellent in usability and moldability.

[0006]

As a result of intensive studies to solve the problems of the above-mentioned conventional examples, the inventors of the present invention have found that a soap composition containing dibutylhydroxytoluene has a polyoxyethylene alkyl ether or Polyoxyethylene alkenyl ether and 1-hydroxyethane-
It has been found that the above object can be achieved by further blending 1,1-diphosphonic acid or a salt thereof, and based on this, the present invention has been completed.

That is, according to the present invention, there is provided a soap composition containing polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether, 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof, and dibutylhydroxytoluene. Provided.

The soap composition of the present invention will be described in detail below.

The polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether used in the present invention has an ethylene oxide chain addition mole number of 2 moles or more in order to obtain a color tone stability (yellowing suppression) effect more effectively. The above is preferably used, more preferably 5 mol or more, particularly preferably 25 mol or more. The blending amount is preferably 0.2% by weight or more, more preferably 0.3 to 10.0% by weight, and particularly preferably 0.4 to 6.0% by weight based on the total amount of the soap composition. . With such a blending amount, a more excellent yellowing suppressing effect can be obtained, and usability and moldability can be improved.

Specific examples of the polyoxyethylene alkyl ether used in the present invention include polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene behenyl ether and the like. Specific examples of the polyoxyethylene alkenyl ether include polyoxyethylene oleyl ether and the like.

These polyoxyethylene alkyl ethers or polyoxyethylene alkenyl ethers have 1
One kind or a combination of two or more kinds can be used.

1-hydroxyethane-1,1-diphosphonic acid (HEDP) is represented by the following chemical formula 1.

[0013]

Embedded image As the salt of HEDP in the compound represented by the following, preferable examples include sodium salt, potassium salt, ammonium salt and the like. These HEDPs and salts thereof may be used alone or in combination of two or more, and the blending amount thereof is 0.01 in the total amount of the soap composition.
To 5.0 wt% is preferable, 0.05 to 2.0 wt% is more preferable, and 0.05 to 2.0 wt% is particularly preferable.
It is 0.5% by weight. With such a blending amount, a more excellent yellowing suppressing effect can be obtained, and usability and moldability can be improved.

Dibutyl hydroxytoluene (BHT)
Is preferably 0.005 to 0.1% by weight in the total amount of the soap composition, more preferably 0.01 to 0.0.
It is 5% by weight.

The soap composition of the present invention can be manufactured by a conventional method. Specifically, for example, animal fats and oils typified by beef tallow, sheep fat, or coconut oil, palm oil,
Palm kernel oil, soybean oil, olive oil, each of vegetable oils and fats represented by cottonseed oil, etc. by saponifying caustic soda, caustic potassium, etc., or by decomposing these oils and fats obtained alone or a mixture of fatty acids. A soap base is manufactured by completely neutralizing it with caustic soda, potassium caustic, alkanolamine and the like. Alternatively, a soap base containing a higher fatty acid may be produced without being completely neutralized. Then, the above-mentioned three essential components are added to the thus obtained soap matrix, mixed, kneaded, extruded and stamped to produce the soap composition of the present invention.

The soap composition of the present invention may be used, if necessary, within a qualitative and quantitative range that does not impair the effects of the present invention.
The following components may be blended for the purpose of the residual oil effect on the skin and skin protection. For example, hydrocarbons such as squalane, olefin oligomer, petrolatum and liquid paraffin, esters such as sugar ester, lanolin and isopropyl myristate, aliphatic alcohols such as acetyl alcohol, stearyl alcohol and oleyl alcohol, and aliphatic alcohols and fatty acids. Ethoxylates, cationic polymers, silicone oils, vitamins, anti-inflammatory agents, etc. Further, propylene glycol, glycerin, polyethylene glycol, sorbitol, maltitol, a propylene oxide adduct of glycerin, diglycerin and the like can be added as a moisturizing agent. Furthermore, various components that are commonly used in detergents, such as chelating agents, preservatives, bactericides, buffers, ultraviolet absorbers, antioxidants, stabilizers, dyes, and fragrances can be added.

[0017]

The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited thereto. The blending amount is% by weight.

Soap compositions having the compositions shown in Tables 1 to 4 below were produced by a conventional method.

Using each of these samples, color tone change, odor change, usability, and moldability were evaluated according to the following test methods and evaluation criteria. [Change in Color Tone] Each sample powder was left at room temperature for 30 days and evaluated by comparing the change in color tone with a standard product (control).

The change in color tone is determined by R. S. It was evaluated by the Lab color system by Hunter based on the hue difference from the standard product (control). That is, a color difference meter (SZ-Z9
0: manufactured by Nippon Denshoku Industries Co., Ltd.) to measure the color tone by reading the b value in the Lab color system, and calculate the difference between the b values before and after leaving (Δb value). Was compared with that of a standard product (control).

Evaluation point of color tone change : 5: Color tone change is much smaller than standard product (control) 4: Color tone change is smaller than standard product (control) 3: Color tone change is slightly smaller than standard product (control) 2: Color tone change is equivalent to standard product (control) 1: Color tone change is larger than standard product (control) [Odor change] Each sample was stored at 37 ° C for 1 month, and then a professional panelist (10 people) The odor was evaluated and evaluated by comparing the odor change with a standard product (control).

Evaluation points of odor change : 4: Smell change is smaller than standard product (control) 3: Smell change is slightly smaller than standard product (control) 2: Smell change is equivalent to standard product (control) 1 The change in odor is larger than that of the standard product (control) [Usability] For each sample, 10 males and 20 females, a total of 20 panelists, use the sample for body washing for 2 weeks. ) Was used for sensory evaluation of usability (smoothness).

Usability evaluation points : 4: Usability (smoothness) is standard (control)
Better 3: Usability (smoothness) is standard (control)
Slightly better 2: Usability (smoothness) is standard (control)
Equivalent to 1: Usability (smoothness) is standard (control)
Worse [Moldability] Each sample was evaluated for moldability by visually comparing it with a standard product (control).

Moldability evaluation points : 4: Moldability better than standard product (control) 3: Moldability slightly better than standard product (control) 2: Moldability equal to standard product (control) 1: Moldability Is worse than the standard product (control) Example 1 0.3% by weight of titanium dioxide and 1.5 of fragrance to the soap base (palm oil / coconut oil = 70/30) (balance)
% By weight, coconut oil fatty acid 5.0% by weight, BHT 0.02% by weight, HEDP 0.1% by weight, polyoxyethylene alkyl ether (various EO addition mole numbers shown in Table 1 below) 1.0% by weight %, And a soap composition was manufactured by a conventional method (Sample Nos. 4 to 11). As a standard product (control), a product having the same composition as described above was prepared except that polyoxyethylene alkyl ether was not compounded (Sample No. 0). In addition, as a comparative example, the same composition as above was manufactured except that ethylene glycol, propylene glycol, and 1,3-butylene glycol were mixed in place of the polyoxyethylene alkyl ether (Sample No. 1). ~ 3).

Using each of these soap compositions as a sample, according to the above test method and evaluation criteria, a change in color tone, a change in odor,
Usability and moldability were evaluated. The results are shown in Table 1.

[0026]

[Table 1] As is clear from the results in Table 1, the sample No. It can be seen that those of Nos. 4 to 11 have less change in color tone and change in odor than Comparative Examples and the standard product (control) and are excellent in stability. Further, it is understood that the usability and the moldability are also excellent. In particular, it can be seen that as the number of moles of ethylene oxide chains added to the polyoxyethylene alkyl ether increases, the color tone and odor change are reduced and the stability is improved, and the usability and moldability tend to be improved.

Example 2 0.3% by weight of titanium dioxide and 1.5 of fragrance based on the soap base (palm oil / coconut oil = 70/30) (balance)
% By weight, coconut oil fatty acid 5.0% by weight, BHT 0.02% by weight, HEDP 0.1% by weight, polyoxyethylene lauryl ether (25 EO) (various compounding amounts shown in Table 2 below) are blended, A soap composition was produced by a conventional method (Sample Nos. 12 to 19). As a standard product (control), polyoxyethylene lauryl ether (2
5E. O. ) Was not mixed, and a compounding composition similar to the above was manufactured (Sample No. 0).

Using each of these soap compositions as a sample, a change in color tone, a change in odor,
Usability and moldability were evaluated. Table 2 shows the results.

[0029]

[Table 2] Example 3 0.3% by weight of titanium dioxide and 1.5 of fragrance with respect to the soap base (palm oil / coconut oil = 70/30) (balance)
% By weight, coconut oil fatty acid 5.0% by weight, BHT 0.02% by weight, HEDP (various compounding amounts shown in Table 3 below), polyoxyethylene lauryl ether (25 EO) 1.
0% by weight was compounded and a soap composition was produced by a conventional method (Sample Nos. 21 to 28). As a standard product (control), a compound having the same composition as described above was prepared except that HEDP was not compounded (Sample No. 20).

Using each of these soap compositions as a sample, a color tone change, an odor change, and
Usability and moldability were evaluated. The results are shown in Table 3.

[0031]

[Table 3] Example 4 0.3% by weight of titanium dioxide and 1.5 of fragrance based on the soap base (palm oil / coconut oil = 70/30) (balance)
% By weight, coconut oil fatty acid 5.0% by weight, BHT (Table 4 below)
Various compounding amounts shown in Table 1), HEDP 0.1% by weight, polyoxyethylene lauryl ether (25 EO) 1.0
The soap composition was manufactured by the conventional method by blending wt% (Sample No. 31 to 36). Standard product (control)
As the above, a product having the same composition as described above was manufactured except that BHT was not compounded (Sample No. 30).

Using each of these soap compositions as a sample, a color tone change, an odor change, and
The feeling of use and moldability were evaluated. The results are shown in Table 4.

[0033]

[Table 4] As is clear from Tables 1 to 4, those within the scope of the present invention are:
It can be seen that there is little change in color tone and change in odor, excellent stability over time, and excellent usability and moldability.

[0034]

As described above in detail, according to the present invention, the instability effect of discoloration of soap due to dibutylhydroxytoluene (BHT) is improved, whereby the stability of the color tone and odor during storage and storage is low. It is possible to provide a soap composition that is excellent in use and excellent in usability and moldability.

Claims (4)

[Claims] 1. A soap composition comprising a polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether, 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof, and dibutylhydroxytoluene. 2. Polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether in an amount of 0.2% by weight or more and 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof in an amount of 0.01 to 0.01% by weight based on the total amount of the soap composition. 5.
0% by weight and 0.0% dibutylhydroxytoluene
The soap composition according to claim 1, which is blended in an amount of 05 to 0.1% by weight. 3. A polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether is contained in an amount of 0.3 to 10.0% by weight and 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof is contained in the total amount of the soap composition. .05
The soap composition according to claim 1, wherein the soap composition is blended in an amount of ˜2.0% by weight and 0.01 to 0.05% by weight of dibutylhydroxytoluene. 4. The soap composition according to claim 1, wherein the number of moles of ethylene oxide chains added to the polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether is 2 or more.