JP3314206B2 - High concentration liquid soap composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid soap used for cleaning clothes and hard surfaces, and more particularly to a liquid soap composition having a high concentration and excellent transparency, solubility and stability.

[0002]

2. Description of the Related Art Conventionally, there are powders, solids, and liquids as detergents containing soap as a main component, and they are widely used for clothes, kitchens and the like. When washing clothes using a washing machine, a powder type is generally used, and the powder type has a higher soap content than a liquid type and has an excellent detergency. However, powdered soap has difficulty in dissolving in cold water, and an operation such as dissolving it in hot water in advance is required to exhibit a sufficient cleaning effect.
If the dissolution is insufficient, not only a sufficient washing effect is not obtained, but also the undissolved residue may adhere to the washed clothes or washing machine. The deposits themselves are undesirable as they impair the appearance of the garment, become a source of bacteria and fungi, and cause odor, yellowing and darkening.

On the other hand, liquid soap dissolves quickly in water, so there is no need to dissolve it in hot water, and there is no such problem caused by undissolved liquid soap.

However, it is very difficult to increase the concentration of the liquid soap, and the liquid soap containing no surfactant other than the soap has a soap content of at most 30 to 40.
% By weight. Therefore, liquid soap is disadvantageous in terms of carrying and packaging materials. For this reason, most of the currently available liquid soaps are complex soaps containing synthetic surfactants.

[0005] As a high-concentration type liquid soap, there has been known a liquid soap obtained by blending dipropylene glycol to form a paste of potash soap (see JP-A-7-90299). However, as the current washing mode, a fully automatic washing machine is mainly used, and if it is not used for partial washing, there is still a problem in terms of solubility, easiness of measurement, use by automatic feeding, and the like, even in the case of paste-like soap.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and provides usability by providing a high-concentration liquid soap excellent in transparency, stability and solubility. Goodness, convenience of carrying,
It is intended to provide advantages such as resource saving and reduction of waste.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have repeated studies focusing on the blending of propylene glycol, and have completed the present invention. Propylene glycol shows good performance in solubilizing soap, and has been conventionally used favorably for liquid soaps and complex soaps. In the present invention, by blending this propylene glycol in a large amount, it effectively served as a solvent and achieved a high concentration of liquid soap.

That is, the high-concentration liquid soap composition according to the present invention contains 40 to 70% by weight of potassium fatty acid, and
Among them, potassium saturated aliphatic fatty acids having 6 to 20 carbon atoms 0
To 70% by weight, and an unsaturated fatty acid having 16 to 24 carbon atoms.
0-70% by weight of potassium fatty acid, citrate and
2-5% by weight of EDTA salt and / or propylene
It is characterized by containing 20 to 30% by weight of glycol .

The amount of propylene glycol is 20 to 3
The range is 0 % by weight. If the amount is too small, it will be difficult for the composition of the present invention to maintain a stable liquid state, and if it is too large, there will be no improvement and it is economically disadvantageous.

[0010] The amount of Kke N Ingredients allowed potassium fatty acid is 40 to 70% by weight of the total composition, also be the fatty acid which is neutralized with potassium to solubilize this is necessary.

The amount of the potassium salt of an aliphatic saturated fatty acid having 6 to 20 carbon atoms in the soap component is 0 to 70% by weight.
It is. The aliphatic saturated fatty acid having 6 to 20 carbon atoms is mainly composed of lauric acid, and is obtained mainly from vegetable fats and oils. As the vegetable oil used here, coconut oil,
Palm kernel oil, Babas kernel oil, bay kernel oil and the like can be mentioned, but palm oil and palm kernel oil are preferred in view of versatility and economic efficiency.

The aliphatic unsaturated fatty acids having 16 to 24 carbon atoms, represented by oleic acid, are obtained mainly from vegetable oils and fats. Examples of vegetable oils and fats used here include safflower oil, rice bran oil, fallen raw oil, sunflower oil, soybean oil, rapeseed oil, fractionated liquid palm oil and the like. Choose a suitable one from these fats and oils or fatty acids, according to the purpose,
Purify and mix.

Citrate and / or EDTA salt (d
(Tylenediamine tetraacetate) as a salt composition
Solubility, contribution to detergency, and solubility of the composition in water
Sodium citrate due to its ability to improve and economic efficiency
And sodium EDTA is preferred.

Distribution of citrate and / or EDTA salt
The total amount varies depending on the salt used, but ranges from 2 to 5% by weight.
It is. If the amount of salt is too small,
The improvement in solubility of certain compositions in water is not sufficient. Ma
Also, if too much, salt precipitation, cloudiness, etc. will occur, and the product form
Is not preferred.

The composition of the present invention may contain a lower alcohol.
Good.

As the lower alcohol, ethanol, n-propanol, isopropanol and the like are suitable.

The composition of the present invention may optionally contain a fragrance,
Dyes (fluorescent agents, bleaching agents, enzymes), alkaline agents, and other additives depending on the purpose can be appropriately added.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to examples. However, the present invention is not limited to these examples.

Example 1 1 part by weight of sodium citrate and 11.6 parts by weight of 96% potassium hydroxide were added to 18.0 parts by weight of ion-exchanged water and dissolved at 30 to 40 ° C. To this aqueous solution was added 25 parts by weight of propylene glycol, and then 33.6 parts by weight of purified coconut oil fatty acid and 8.8 parts by weight of purified oleic acid (oleic acid content: 75% by weight). After cooling the obtained mixture to 10 to 30 ° C, ethanol 2
By weight, a liquid soap composition was obtained. Table 1 shows the weight percentage of each component.

Examples 2 to 4 , Comparative Example 1 A liquid soap composition was obtained in the same manner as in Example 1 except that the amount of the organic acid salt was changed. The amount of each component is shown in Table 1 by weight%.

Examples 5 to 6 and Comparative Examples 2 to 3 Liquid soap compositions were obtained in the same manner as in Example 1 except that the blending components and blending amounts were changed. The amount of each component is shown in Table 2 in% by weight.

Evaluation The following items were evaluated for the liquid soap compositions obtained in Examples and Comparative Examples. Evaluation results are shown in Table 1 and Table 2.
Shown in

A) Transparency and fluidity test The transparency and fluidity of the liquid soap composition at a temperature of 10 to 47 ° C. were evaluated based on the following criteria.

Transparent, free of sediment, etc., good in fluidity. ○ Not transparent, sedimented, poor in fluidity. × b) Stability test A glass bottle containing the liquid soap composition is placed in a low-temperature constant temperature bath. And the temperature at which gelation or solidification occurred when the temperature was lowered at a rate of 1 ° C. per hour was measured, and the stability was evaluated based on the following criteria.

Temperature lower than −10 ° C. ○○ Temperature higher than −10 ° C. × C
Then, 1.33 g of the composition was added dropwise to the mixture, and the time required for complete dissolution was visually measured, and the solubility was evaluated based on the following criteria.

When dissolved in less than 30 seconds: ○ When it took more than 30 seconds: ×

[Table 1]

[Table 2] As can be seen from Tables 1 and 2, the liquid soaps of the examples showed good results in all items.

[0027]

According to the present invention, a high-concentration liquid soap excellent in transparency, stability and solubility can be provided, which is easy to use, easy to carry, saves resources, reduces waste and the like. Is obtained.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-270533 (JP, A) JP-A-1-318099 (JP, A) JP-A-60-177100 (JP, A) JP-A-4- 57896 (JP, A) JP-A-11-71599 (JP, A) JP-A-5-148500 (JP, A) JP-A-62-256899 (JP, A) JP-A-7-90299 (JP, A) JP-A-8-3597 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C11D 17/08 C11D 9/00-9/60

Claims (1)

(57) [Claims] 1. A fatty acid potassium of 40 to 70% by weight, and
Among them, potassium saturated aliphatic fatty acids having 6 to 20 carbon atoms 0
To 70% by weight, and an unsaturated fatty acid having 16 to 24 carbon atoms.
0-70% by weight of potassium fatty acid, 2-5% by weight of citrate and / or EDTA salt,
And, concentrated liquid soap composition characterized in that it contains 20 to 30 wt% of propylene glycol.