JP3347511B2 - Bar soap composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a soap bar composition,
In particular, the present invention relates to a solid soap composition having excellent scent retention properties over a long period of time, good foaming and the like, and excellent use feeling.

[0002]

2. Description of the Related Art A solid soap composition is prepared by reacting a mixed oil such as beef tallow or coconut oil with caustic soda (saponification), or neutralizing a mixed fatty acid obtained by decomposing tallow or coconut oil with caustic soda. It is manufactured by blending additive components such as fragrances with the obtained soap base. Such a solid soap composition has a function as a soap (for example, foaming, etc.) due to its commercial characteristics.
In addition, since the scent and the like have a great effect on the commercial value, it is desirable to have excellent scent retention.

[0003] However, it is generally known that when a solid soap composition is stored or used for a long period of time, the smell is gradually reduced and the original fragrance of the soap composition is weakened. In order to cope with such a problem, a stabilizer such as a chelating agent or an antioxidant is conventionally added,
Methyl glucoside derivatives are independently compounded (US Pat. No. 4,264,478), or they are combined with a chelating agent and the like. However, the fact is that none of these conventional products has been able to maintain the scent-retaining effect even over a long period of time.

[0004] For this reason, there has been a demand for the production of a solid soap composition which is excellent in fragrance retention over time, good in foaming and the like, and excellent in usability.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to have excellent scent retention for a long period of time, good foaming, etc. The object of the present invention is to provide an excellent solid soap composition.

[0006]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above problems, and as a result, have found that polyoxypropylene methyl glucoside, 1-hydroxyethane-
It has been found that the above object can be achieved by blending 1,1-diphosphonic acid or a salt thereof, ethylenediaminetetraacetic acid (EDTA) or a salt thereof, and a higher fatty acid in predetermined amounts, and based on this finding, completed the present invention. I came to.

That is, according to the present invention, (A) 0.01 to 5.0% by weight of polyoxypropylene methyl glucoside and (B) 0.1% by weight of 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof. 0.1 to 2.0% by weight of (C) ethylenediaminetetraacetic acid (EDTA) or a salt thereof in 0.1%;
0.01 to 2.0% by weight, and (D) higher fatty acid in 0.5
To 10.0% by weight of a solid soap composition is provided.

Hereinafter, the solid soap composition of the present invention will be described in detail.

The polyoxypropylene methyl glucoside which is the component (A) of the present invention is represented by the following chemical formula 1.

[0010]

Embedded image It is represented by In the above formula, the average addition mole number (n) of the polyoxypropylene is preferably from 8 to 30, and particularly preferably n = 20. If n is out of the above range, the scent retaining effect may not be sufficient. The blending amount of the polyoxypropylene methyl glucoside is 0.01 to 5.0% by weight based on the total amount of the solid soap composition, and preferably 0.01 to 5.0% by weight.
To 3.0% by weight, more preferably 0.03 to 2.0% by weight. If the amount is less than 0.01% by weight, no improvement in the scent retention is observed, while if it exceeds 5.0% by weight, further improvement in the scent retention effect can hardly be expected.

The component (B), 1-hydroxyethane-1,
1-diphosphonic acid (hereinafter abbreviated as “HEDP”) is represented by the following chemical formula 2.

[0012]

Embedded image In the compound represented by Formula (I), preferred examples of the salt of HEDP include a sodium salt, a potassium salt, and an ammonium salt. The amount of these HEDPs or salts thereof is 0.01 to 2.0% by weight, preferably 0.05 to 1.0% by weight, more preferably 0.08 to 0.5% by weight based on the total amount of the solid soap composition. % By weight. The amount is 0.01
If the amount is less than the weight percentage, the bar soap composition cannot be stabilized, and the scent retention is deteriorated. On the other hand, even if it is added in excess of 2.0% by weight, further improvement of the scent retention effect can hardly be expected. These HEDPs and salts thereof may be used alone or in combination of two or more.

The amount of the component (C), ethylenediaminetetraacetic acid (EDTA) or a salt thereof, is 0.01 to 2.0% by weight, preferably 0.1 to 2.0% by weight, based on the total amount of the solid soap composition.
It is from 0.5 to 1.0% by weight, more preferably from 0.1 to 0.5% by weight. If the amount is less than 0.01% by weight, stabilization of the solid soap cannot be achieved, and the retention of the scent deteriorates. on the other hand,
Even if it is added in excess of 2.0% by weight, further improvement of the scent retention effect can hardly be expected. Preferred examples of the salt include a sodium salt, a potassium salt, an ammonium salt and the like. These EDTA and salts thereof may be used alone or in combination of two or more.

The higher fatty acid as the component (D) can be used without any particular limitation as long as it can be usually used in a soap composition. Examples thereof include higher fatty acids having 8 to 24 carbon atoms. Specifically, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, behenic acid and other single fatty acids, coconut oil fatty acids, tallow fatty acids, palm oil fatty acids, palm kernel oil fatty acids, and Mixtures of these fatty acids and the like can be mentioned. The amount of the component (D) is 0.5% in the total amount of the solid soap composition.
To 10.0% by weight, preferably 2.0 to 7.0% by weight, and more preferably 3.0 to 6.0% by weight.
If the amount is less than 0.5% by weight, the foaming of the solid soap is not good, while if it exceeds 10.0% by weight, the soap becomes soft and difficult to mold, and there is a problem in productivity.

In the present invention, for the first time, the components (A) to (D) are blended in a blending amount within the range of the present invention.
The object of the present invention can be achieved. In particular, when any of the components (A) to (C) falls outside the scope of the present invention,
A sufficient effect of maintaining the fragrance over a long period of time cannot be obtained. When the component (D) is out of the range of the present invention, a sufficient effect cannot be obtained in terms of foaming.

The solid soap composition of the present invention can be produced by a conventional method. That is, for example, first, animal fats and oils represented by beef tallow, sheep fat, etc., or vegetable oils and fats represented by coconut oil, palm oil, palm kernel oil, soybean oil, olive oil, cottonseed oil, etc., alone or in a mixture with caustic soda, A soap base is produced by saponifying with potassium or the like, or completely neutralizing a single or mixture of fatty acids obtained by decomposing these fats and oils with caustic soda, caustic potassium, alkanolamine and the like. Alternatively, a soap base containing higher fatty acids may be produced without complete neutralization. Next, the components (A) to (D) are added to the soap base, mixed, kneaded, extruded, and stamped to produce the solid soap composition of the present invention.

The solid soap composition of the present invention may contain the following components, if necessary, for the purpose of residual oil on the skin and protection of the skin, as long as the effects of the present invention are not impaired. can do. 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; aliphatic alcohols and fatty acids Ethoxylates, cationic polymers, silicone oils, vitamins, anti-inflammatory agents and the like. In addition, propylene glycol, glycerin, polyethylene glycol, sorbitol, maltitol, propylene oxide adduct of glycerin as a humectant,
Diglycerin and the like can be blended. Furthermore,
Various components commonly used in cleaning agents, for example, chelating agents,
Preservatives, bactericides, buffers, UV absorbers, antioxidants,
Dyes, fragrances and the like can be blended.

[0018]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto. The blending amount (%) indicates% by weight.

A solid soap composition having the composition shown in Table 1 below was produced by a conventional method.

Each of the solid soap compositions was used as a sample and evaluated for scent retention and foaming according to the following test methods and evaluation criteria. [Scent retention] Each sample was left naked at room temperature for 30, 60 and 100 days. This was compared with a control sample (control) previously stored in a cool dark place, and the odor was evaluated according to the following evaluation criteria. Table 1 shows the results.

◎: no difference from control sample (very good smell) ○: little difference from control sample (good smell) △: slightly worse than control sample (smell is not so good) ×: considerably worse than control sample (poor smell) [foaming] For each sample, a panel of 20 men and women, 10 men and women, used for body washing for 2 weeks, and the foaming was sensory according to the following evaluation criteria. evaluated. Table 1 shows the results.

◎: Very good bubbling ○: Good bubbling △: Not very good bubbling ×: Bad bubbling

[0023]

[Table 1] As is clear from Table 1, it can be seen that the product of the present invention is a solid soap composition having excellent scent retention over a long period of time and also having a good feeling in use such as foaming.

On the other hand, in the comparative product, a defect occurred in any of scent retention and foaming. Especially (A),
It can be seen that when any one of the components (B) and (C) is not contained, or when the amount of any one of the components is out of the range of the present invention, a long-lasting scent retention effect cannot be obtained.

[0025]

As described above in detail, according to the present invention, polyoxypropylene methyl glucoside, 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof, ethylenediaminetetraacetic acid (EDTA) or a salt thereof, and Since each of the fatty acids is configured to be blended in a predetermined amount, it has an excellent scent retention property over a long period of time, and has the effect of providing a solid soap composition having good foaming and the like and excellent usability. .

Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) C11D 9/26 C11D 9/30 C11D 9/34 CA (STN) REGISTRY (STN)

Claims (1)

(57) [Claims] (A) 0.01-5.0% by weight of polyoxypropylene methyl glucoside, (B) 0.01-2.0% by weight of 1-hydroxyethane-1,1-diphosphonic acid or a salt thereof. %, (C) 0.01 to 2.0% by weight of ethylenediaminetetraacetic acid (EDTA) or a salt thereof, and (D) 0.5 to 10.0% by weight of a higher fatty acid. .