KR100998052B1 - Toilet soap composition - Google Patents

Abstract

The present invention relates to a cosmetic soap composition. The present invention comprises 0.1 to 10% by weight of sodium polyethylene glycol sulfonate in the cosmetic soap composition to improve the physical properties and workability of the soap, and to maintain the smoothness and moisturizing power of the skin excellently.

Cosmetic soap, sodium polyethylene glycol sulfonate

Description

Cosmetic soap composition {TOILET SOAP COMPOSITION}

[TECHNICAL FIELD OF THE INVENTION]

The present invention relates to a cosmetic soap composition, and more particularly, to a cosmetic soap composition containing sodium polyethylene glycol sulfonate in cosmetic soap, having excellent feeling of use and moisturizing effect, and good physical property and soap manufacturing workability.

 [Prior Art] Soap is a mixed soap comprising a fatty acid soap obtained by decomposing fats or oils and a fatty acid soap neutralized with alkali and a fatty acid soap as a main cleaning component, and containing a surfactant as an auxiliary cleaning component, And it can be divided into a synthetic surfactant soap (Syndet bar, hereinafter referred to as a cosmetic soap) using a surfactant as a main cleaning component and a fatty acid soap as an auxiliary cleaning component or binder.

Fatty acid soaps are generally easy to manufacture, inexpensive, and hard, so they are not easily softened or frayed.However, aqueous solutions show alkali, which often removes sebum in the skin and softens the stratum corneum. This can cause the skin to dry and lose its elasticity, which can cause the skin to become rough or irritated. On the contrary, since the liquid soap of the aqueous solution is neutral to weak alkali, it has the advantage of less irritation to the skin and an excellent moisturizing effect.

Cosmetic soaps are somewhat different depending on the type and amount of surfactant used as a periodic agent, but in general, compared to fatty acid-based soaps, they have a good feeling of use and foaming in hard water, and in particular, they have better affinity with the skin than soaps. Almost no irritation and troubles, there is an advantage of excellent skin moisturizing power. However, due to lack of proper bonding strength and hardness, such as fatty acid soaps, it is not easy to manufacture a solid soap due to deterioration of molding and moldability, and has higher solubility than fatty acid soaps to absorb or hydrate water during or after use. Soap is easy to recede due to its high degree of appearance, which is not only not good in appearance, but also exhibits undesirable properties that worsen the feeling of re-use and entails an economic loss of easily worn out soap.

Thus, in order to improve the physical properties and workability of the cosmetic soap, binders such as higher fatty acids, higher fatty alcohols, polyethylene glycol (PEG) and excipients such as dextrin, starch, anhydrous forage, salt and talc are generally used. The above binders and excipients are also used for the internal structural stability of the final product, for maintaining the hardness of the product and for economic purposes. However, if the cosmetic soap contains an excessive amount of a binder or excipient, the surface feel of the product may be rough and the quality of the smoothness may be degraded, or the general merits of the surfactant may be degraded. This may cause a problem that the overall appearance of the product worsens.

As a method to solve the above problems, US Patent No. 5,683,683 proposes a method using a mixture of anionic, nonionic and amphoteric surfactants. The method described above may provide a moisturizing effect to the skin by synergistic effect of each surfactant by inhibiting the drying of the skin by the use of a mixed surfactant, but the use of nonionic and amphoteric surfactants In the case of excessive use, there is a disadvantage in that discoloration and deterioration in the long-term storage.

In addition, U.S. Patent No. 4,695,395 suggests a method of improving moisture retention by using sodium isethionate as an organic salt, but its effect is not clear.

Therefore, the development of a cosmetic soap excellent in feeling, moisturizing power, workability and usability is required.

Accordingly, an object of the present invention is to provide a cosmetic soap composition excellent in usability, moisturizing power, physical properties and workability.

In order to achieve the above object, the present invention provides a cosmetic soap composition comprising 20 to 85% by weight of soap, 0.1 to 10% by weight of sodium polyethylene glycol sulfonate, 1 to 15% by weight of fatty acid and the balance of water.

Hereinafter, the present invention will be described in detail.

The present inventors have completed the present invention by confirming that the above-mentioned problems can be solved as well as excellent moisturizing power when sodium PEG sulfonate was studied to improve physical properties, workability and usability of the cosmetic soap.                     

The cosmetic soap composition of the present invention comprises 20 to 85% by weight of soap, 0.1 to 10% by weight of sodium polyethylene glycol sulfonate, 1 to 15% by weight of fatty acid and the balance of water.

The soap can be a conventional soap base, for example a fatty acid derived from palm, tallow, palm kernel oil or palm oil. Representative soaps include alkali metal soaps, transparent soaps, translucent soaps or mixed soaps containing up to 30% of surfactants. The alkali metal soap may be a fatty acid metal salt having 8 to 20 carbon atoms, and the metal salt may be potassium hydroxide or sodium hydroxide.

The sodium PEG sulfonate is represented by the following formula (1).

(Formula 1)

HOCH ₂ CH (OH) CH ₂ SO ₃ Na

Sodium PEG sulfonate can be used by purchasing a manufactured or commercially available product. For example, sodium PEG sulfonate may be a mixture of glycidol and sodium hydrogensulfite, or a mixture of chloro propandiol and sodium sulfite, followed by a solvent and It can be prepared by reaction and drying at a temperature. The solvent may be selected from the group consisting of water, ethanol, isopropanol, and mixtures thereof, and the reaction may be performed at 40 to 90 ° C., but is not limited thereto. Do.                     

Sodium PEG sulfonate is believed to contribute to enhancing the smoothness and moisturizing properties of the skin when using a diol group. Sodium PEG sulfonate may be included in the cosmetic soap composition in an amount of 0.1 to 10% by weight, and if the content thereof is less than 0.1% by weight, the physical properties, usability and moisturizing power of the cosmetic soap may be insufficient. The workability may deteriorate and the physical properties such as the dryness of the soap may deteriorate. The preferred content of sodium PEG sulfonate is 1-7 wt%.

In addition, the cosmetic soap composition of the present invention includes a fatty acid for the purpose of increasing the binding force and improving the feeling of use. The fatty acid may be used in 1 to 15% by weight, wherein the fatty acids may be used alone or in combination. If the content of the fatty acid is less than 1% by weight, it is difficult to obtain a suitable plasticity and bonding strength, and when the content of the fatty acid exceeds 15% by weight, the workability may not be good due to the viscosity of the fatty acid, and the rinsability may be low. The fatty acids may be fatty acids obtained from animal fats and oils such as tallow and lard, palm oil, palm kernel oil, palm oil, palm stearin oil, or fatty acids obtained by fractional distillation of fatty acids and hydrogenation. It is preferable to select in consideration of the characteristics and economical efficiency. Examples of fatty acids include caprylic acid, capric acid, lauric acid, oleic acid, linoleic acid, linolenic acid, myristic acid, and palmitic acid. acid) and stearic acid, but are not limited thereto.

In addition, the cosmetic soap composition of the present invention may further include a surfactant or a conventional soap additive in addition to the sodium PEG sulfonate. The surfactant may be any kind of surfactant used in conventional soaps. The said surfactant can be used individually or in mixture of 2 or more types. The surfactant may be included in the cosmetic soap composition in an amount of 2 to 60% by weight, and when it is less than 2% by weight, the cleaning effect may be insignificant, and when it exceeds 60% by weight, workability and physical properties may be deteriorated.

Surfactants such as acyl isethionate, alkyl sulfates, alkyl sulfosuccinates, alkyl glyceryl ether sulfonates, straight chain alkyl benzene sulfonates, acyl taurates, alkyl sulfoacetates, acyl sacosinates, acyl glutamate, alkyl ethers Sulphate and sodium mono glyceride sulfonate. In particular, sodium monoglyceride sulfonate may be represented by the following Chemical Formula 2, and may be prepared from palm oil, palm kernel oil, palm oil fatty acid.

(Formula 2)

RCOOCH₂CHOHCH₂SO₃Na

In Formula 2, R is C ₁₂ , C ₁₄ , C ₁₆ or C ₁₈ alkyl.

The soap additive may be selected from the group consisting of oil-based moisturizers, voiceless moisturizers, pigments, fragrances, fungicides, antioxidants, metal ion sequestrants and mixtures thereof, the content of which may be differently applied depending on the type of additive. For example, the content of the soap additive may be 0.1 to 10% by weight.

Hereinafter, examples of the present invention will be described. The following examples are only for illustrating the present invention, but the protection scope of the present invention is not limited to the following examples.                     

Examples 1-5 and Comparative Examples 1-3

To the composition (unit: wt%) of Table 1 below, the mixture was uniformly mixed using a mixer and a roll mill, and then molded and extruded in a conventional cosmetic soap manufacturing apparatus, and the mold of Examples 1 to 5 Cosmetic soap was prepared. In addition, the toilet soap of Comparative Examples 1 to 3 of Table 1 was prepared in the same manner.                     

Example Comparative example One 2 3 4 5 One 2 3 Sodium monogly
Ceride sulfonate - - 15.0 35.0 45.0 - - 45.0 soap 80.0 77.0 60.0 40.0 25.0 80.0 70.0 32.0 Palm, palm kernel oil fatty acid 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Sodium Fiji Sulfonate 1.0 3.0 3.0 5.0 7.0 0.05 12.0 - glycerin - 1.0 - - 1.0 - 1.0 - Sodium chloride 0.6 0.6 3.0 7.0 9.0 0.6 0.6 9.0 Titanium dioxide 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 Spices 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 moisture To
100 To
100 To
100 To
100 To
100 To
100 To
100 To
100 Sodium monoglyceride sulfonate is represented by the following formula (2).
(2)
RCOOCH₂CHOHCH₂SO₃Na
The R may be used alone or in combination of palm oil, palm kernel oil, palm oil fatty acid or C ₁₂ , C ₁₄ , C ₁₆ , C ₁₈ single fatty acids. In this experiment, a fatty acid mixed with palm oil fatty acid to palm kernel oil fatty acid to lauric acid (C ₁₂ ) 40 to 40 to 20 was used .
Soap: Derivatives of palm, tallow, palm kernel oil or palm oil

Experimental Example 1: evaluation of workability (molding and mold)

Workability was evaluated about the cosmetic soap of Examples 1-5 and Comparative Examples 1-3.

Molding workability was measured based on the extrusion and conveying state in the molding machine and the screw when manufacturing the soap, moldability is shown in Table 2 by measuring the degree to which the soap does not adhere to the mold in accordance with the following evaluation criteria.

(Evaluation standard)

Good: Good molding and moldability

Usually: molding. Moldability                     

Poor: poor molding and moldability

Experimental Example 2: Evaluation of Physical Properties

The softness of the soap was evaluated by measuring the absorbance as follows.

Put the weight of the soap (W ₁ ) into a pin of known weight and settle for 4 hours in a constant temperature bath at 25 ℃ and 40 ℃, respectively, take out the weight (W ₂ ) after drying for 1 hour at room temperature The absorbance was calculated by substituting this in Equation 1 below. Absorbance is shown in Table 2 below.

(Equation 1)

% Absorption = (W ₂ -W ₁ ) / W ₁ × 100

Absorption means that the larger the value, the greater the ability to contain water, so that the physical properties are not good. If the value is (-), it means that the soap is dissolved in water, which is also not preferable. The absorption of conventional fatty acid-based soap is 5 to 25.

Experimental Example 3: Evaluation of Usability

The feeling of soap was evaluated by measuring the smoothness.

Male and female subjects of 15 subjects were used in a method of using a general toilet soap in a tap water at 25 ° C., and the average value was obtained by assigning a score based on the following criteria. The experimental results are shown in Table 2 below.

(Evaluation standard)                     

5 points | pieces: soap is very smooth

4 points | pieces: soap is a little smooth

3 points: normal

2 points | pieces: soap is slightly rough

1 point: soap is very rough

Experimental Example 4: Measurement of Skin Water Retention

Skin moisture retention was determined by measuring the electrical conductivity through the skin using Skicon-200 (IBS CO., Japan). The test subject was allowed to rest for 20 minutes in a constant temperature and humidity room (23 ° C., 50%), and then measured five times or more for each part, and was determined as the average of the remaining values except for the lowest and highest measurements. Measurements were taken before the test and 2 hours after the last wash daily. Skin moisture retention was calculated according to Equation 2 below, which means that the higher the value, the better moisturizing power.

(Equation 2)

Skin moisture retention (%) = skin moisture retention after 5 days / skin moisture retention before use X 100                     

division Example Comparative example One 2 3 4 5 One 2 3 Workability Good Good Good Good Good Good Bad Good Absorbance 12.3 15.6 10.8 8.2 6.0 12.0 28.0 -1.2 Smoothness 3.3 3.6 3.8 4.1 4.5 2.8 - 4.0 Skin moisture retention rate (%) 55.6 60.1 62.5 65.8 70.0 47.5 - 65.8

In Table 2, the cosmetic soaps of Examples 1 to 5 were all excellent in workability, absorbency, smoothness and skin moisture retention at the same time. On the other hand, Comparative Example 1 was not good smoothness and moisture retention rate, Comparative Example 2 was not good workability, Comparative Example 3 was excellent in smoothness and moisture retention rate but not good absorbency.

As mentioned above, the cosmetic soap composition of the present invention contains sodium sebum sulfonate, which is good in physical properties and workability of soap, and is very excellent in smoothness and moisturizing skin of soap.

Claims (3)

20 to 85 wt% soap; Sodium polyethylene glycol sulfonate 0.1 to 10% by weight; 1 to 15% by weight of fatty acids; And Residual amount of water; Cosmetic soap composition comprising a. The method of claim 1 wherein the cosmetic soap composition is acyl isethionate, alkyl sulfate, alkyl sulfosuccinate, alkyl glyceryl ether sulfonate, straight chain alkyl benzene sulfonate, acyl taurate, alkyl sulfoacetate, acyl sacosoxy A cosmetic soap composition further comprising 2 to 60% by weight of a surfactant selected from the group consisting of nates, acyl glutamate, alkyl ether sulfates, sodium monoglyceride sulfonates and mixtures thereof. The composition of claim 2, wherein the sodium monoglyceride sulfonate is represented by Formula 2: (Formula 2) RCOOCH₂CHOHCH₂SO₃Na In Formula 2, R is C ₁₂ , C ₁₄ , C ₁₆ or C ₁₈ alkyl.