KR20040059031A - Transparent soap composition - Google Patents

Abstract

PURPOSE: A transparent soap composition is provided, to improve transparency and hardness, to reduce softening and to allow a soap to be produced without a maturing period. CONSTITUTION: The transparent soap composition comprises 1-10 wt% of a polyoxyethylene alkyl ether and/or 0.5-7 wt% of a polyoxyethylene silicon. Preferably the polyoxyethylene alkyl ether is represented by RO-(CH2CH2O)n-H (wherein R is an alkyl group of C12-C18 and n is 2-15); and the polyoxyethylene silicon is represented by the formula 2 (wherein n is 3-10). Preferably the ratio of the polyoxyethylene alkyl ether and the polyoxyethylene silicon is 0.1:0.9 to 0.9:0.1.

Description

Transparent soap composition {TRANSPARENT SOAP COMPOSITION}

[TECHNICAL FIELD OF THE INVENTION]

The present invention relates to a transparent soap composition, and more particularly, to provide a transparent soap composition comprising polyoxyethylene alkyl ether or polyoxyethylene silicone, which is excellent in transparency, hardness, and repelling effect, as a nonionic surfactant.

[Private Technology]

The transparency mechanism of transparent soap is generally known as follows. Conventional cosmetic soap has a mosaic structure in which the molecular structure is arranged horizontally by the action of ionic coulombs and van der Waals forces between hydrocarbons between fatty acid soap molecules and adjacent molecules, and the structure grows to form a fibrous structure. Although transparency is not shown due to the formation of a chlorinating agent, the clarifying agent greatly affects the van der Waals forces between hydrocarbons, weakening the forces between adjacent molecules, thereby inhibiting the growth of the fiber structure, and miniaturizing the crystals, thereby making it a normal light wavelength. Optical continuity at is given to make it appear transparent. Using this principle, the transparent soap is mainly composed of fatty acid sodium, potassium and triethanolamine soaps, or a mixture of such fatty acid soaps and anionic surfactants, and polyhydric alcohols such as propylene glycol, glycerin, sorbitol and sugar. And sugars such as fructose and the like are added and prepared.

In particular, U.S. Patent No. 2,820,768 discloses sodium soap made by reacting tallow fatty acid, palm fatty acid, palm oil fatty acid or tallow, palm oil, palm oil and the like with caustic soda. A method of inducing crystals to produce a clear soap is disclosed. This transparent soap is marketed as a representative brand Neutrogena. However, such a transparent soap is excellent in transparency and usability, while the swelling property is high, so it is easy to fall off during use, and there is a problem of discoloration of brown color due to sunlight containing an excess of triethanolamine.

In addition, Japanese Patent Application Laid-Open No. 81-116800 uses fatty acid soap as a periodic agent, heats and dissolves an excess of alcohol and a clearing agent such as a polyhydric alcohol such as sugar, glycerin, sorbitol, and the like, and then cools and solidifies and dry the water and It mentions the method of manufacturing a transparent soap by evaporating volatile components, such as ethanol. While the transparent soap according to the above method is excellent in transparency and physical properties, it is possible to produce the finished product only by processing the surface, and there is a disadvantage in that it takes a lot of work space and drying time to dry.

In order to solve this problem, recently, a weakly acidic transparent soap composition using glutamic acid as a periodic agent has been disclosed by adding an alkyl poly glycoside or an amphoteric phosphate ester-based surfactant to improve transparency or using no fatty acid as a base. However, the above-mentioned transparent soap absorbs water and causes opacity, and still contains a problem of being easily dissolved in water.

The present invention has been made to solve the problems of the prior art, an object of the present invention is to provide a transparent soap composition excellent in transparency and hardness characteristics.

It is another object of the present invention to provide a transparent soap composition that does not easily recede by water absorption when using soap and does not require a aging period.

In order to achieve the above object, the present invention provides a transparent soap composition comprising (a) 1 to 10% by weight of polyoxyethylene alkyl ether or (b) 0.5 to 7% by weight of polyoxyethylene silicone.

Hereinafter, the present invention will be described in more detail.

The inventors of the present invention, while studying a transparent soap composition excellent in transparency and hardness characteristics, when using a polyoxyethylene alkyl ether or polyoxyethylene silicone as a non-ionic surfactant, if the transparency and hardness is excellent, a transparent soap does not require a aging period It was confirmed that the present invention was completed.

The transparent soap composition of the present invention comprises (a) a soap, (b) anionic surfactant, (c) a clearing agent, and (d) a nonionic surfactant having a HLB (Hydrophilic Lipophlic Balance) of 4 to 14.

The soap is preferably an alkali metal salt of C ₁₀ to C ₁₈ fatty acids, the metal salt may be sodium, or a mixture of sodium and potassium. More preferred are alkali sodium salts of C ₁₀ to C ₁₈ fatty acids. The content of soap in the transparent soap composition is preferably 30 to 40% by weight. If the content of the soap is less than 30% by weight hardness characteristics may be reduced, if the content exceeds 40% by weight transparency may be reduced.

The anionic surfactant is used for the purpose of improving the foaming power and transparency of the transparent soap. The anionic surfactant may be a conventional anionic surfactant, and examples thereof include monoalkyl phosphate esters, isethionic acid esters of higher fatty acids, and methyl taurine ester sodium salts or methyl taurate ester potassium salts of higher fatty acids alone or in combination. It can mix and use the above. The content in the transparent soap composition of the anionic surfactant is preferably 5 to 15% by weight. If the content of the anionic surfactant is less than 5% by weight, the degree of foaming and hardness may be lowered, and when the content of the anionic surfactant is more than 15% by weight, the water absorption may be increased to soften the soap and lose transparency.

The transparent agent may be used alone or in combination of one or more of a polyhydric alcohol containing glycerin, propylene glycol, sorbitol and ethylene glycol, or a sugar including sugar and fructose. The content of the clearing agent in the clear soap composition is preferably 10 to 30% by weight. If the content of the clearing agent is less than 10% by weight, transparency and physical properties may deteriorate. If the content of the clearing agent exceeds 30% by weight, a long time for drying and a large work space are required.

The nonionic surfactant has a low HLB (Hydrophilic Lipophlic Balance) value, which is effective for improving hardness characteristics. A large HLB value is effective for improving transparency, but a HLB value of 14 or more deteriorates transparency. Therefore, it is preferable to use one or more mixtures of HLB values within 4 to 14 alone. The nonionic surfactant may be polyoxyethylene alkyl ether or polyoxyethylene silicone alone or in a mixture. Preferred polyoxyethylene alkyl ethers are compounds represented by the following formula (1), and preferred polyoxyethylene silicones are compounds represented by the following formula (2).

(Formula 1)

RO- (CH ₂ CH ₂ O) _n -H

In Formula 1, R is alkyl having 12 to 18 carbon atoms, n is 2 to 15.

(Formula 2)

In Formula 2, n is 3 to 10.

More preferred polyoxyethylene alkyl ethers are compounds wherein R is 12-18 alkyl and n is 5-15.

The polyoxyethylene alkyl ether may be included in the transparent soap composition in 1 to 10% by weight, preferably 2 to 7% by weight. When the content of the polyoxyethylene alkyl ether is less than 1% by weight, the transparency, hardness, and odorlessness may be reduced. When the content of the polyoxyethylene alkyl ether is greater than 10% by weight, the transparency is lowered and may be easily withdrawn by water absorption during use.

The polyoxyethylene silicone may be included in the transparent soap composition in 0.5 to 7% by weight, preferably 1 to 5% by weight. When the polyoxyethylene content is less than 1% by weight, the transparency, hardness, and softness-improving effects may be reduced, and when it exceeds 7% by weight, transparency may be reduced.

In the case where the polyoxyethylene alkyl ether and polyoxyethylene silicone are mixed and used, each mixing weight ratio is preferably 0.1: 0.9 to 0.9: 0.1, and the content of polyoxyethylene alkyl ether and polyoxyethylene silicone in the transparent soap composition is 0.5 to 10% by weight is preferred.

In addition, the transparent soap composition of the present invention may further include a component commonly included in a conventional cosmetic soap or transparent soap. A typical component may be a moisturizer, a pigment, or a perfume, but is not limited thereto.

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

Examples 1-4 and Comparative Examples 1-3

Each composition (unit: weight%) of Table 1 was mixed, heated at 75-80 degreeC, and it stirred until it became a transparent liquid phase. The mixture was cooled to 60 to 65 ° C., 1.0% by weight of perfume was mixed and stirred uniformly, and then poured into a mold of a predetermined shape to cool and solidify to prepare a transparent soap.

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Sodium soap 35 35 35 35 35 35 35 Propylene glycol 12 12 12 12 12 12 12 glycerin 8 8 8 8 8 8 8 Sugar 10 10 10 10 10 10 10 Polyoxyethylene (3) Lauryl Sulfate 10 10 10 10 10 10 10 Polyoxyethylene (5) lauryl ether One 5 10 _ _ 15 _ Polyoxyethylene (12) lauryl ether _ _ _ 5 _ _ _ Polyoxyethylene (20) lauryl ether _ _ _ _ _ _ 5 Tetrasodium ID 0.1 0.1 0.1 0.1 0.1 0.1 0.1 incense One One One One One One One Purified water To 100 To 100 To 100 To 100 To 100 To 100 To 100 Polyoxyethylene lauryl sulfate n is 3, 5, 12, 20.

Examples 5-9 and Comparative Examples 4-5

Each composition (unit: wt%) shown in Table 2 was mixed, heated to 75 to 80 ° C., and stirred until it became a clear liquid phase. This was cooled to 60-65 ° C., 1.0% by weight of perfume was mixed and stirred uniformly, and then poured into a mold of a certain shape to cool and solidify to prepare a transparent soap.

Example 5 Example 6 Example 7 Example 8 Example 9 Comparative Example 4 Comparative Example 5 Sodium soap 35 35 35 35 35 35 35 Propylene glycol 12 12 12 12 12 12 12 glycerin 8 8 8 8 8 8 8 Sugar 10 10 10 10 10 10 10 Polyoxyethylene (3) Lauryl Sulfate 10 10 10 10 10 10 10 Polyoxyethylene (12) lauryl ether _ _ _ _ 5 _ _ Polyoxyethylene (3) Silicone 0.5 5 7 _ _ 10 _ Polyoxyethylene (9) Silicone _ _ _ 5 5 _ _ Polyoxyethylene (12) Silicone _ _ _ _ _ _ 5 Tetrasodium ID 0.1 0.1 0.1 0.1 0.1 0.1 0.1 incense One One One One One One One Purified water To 100 To 100 To 100 To 100 To 100 To 100 To 100

Experimental Example

(1) transparency evaluation

Transparent soaps of Examples 1 to 9 and Comparative Examples 1 to 5 were cut to a thickness of 20 mm, and the transmittance was measured using a Spectro Color Meter SE 200 using the sample.

(2) hardness evaluation

Soap hardness, that is, hardness (Hardness) was measured using a Fudoh Rheo Meter. The maximum load value was measured by applying the center of the transparent soap to a 20 mm / min speed up to 20 mm using a tip-type adapter.

(3) evaluability

The softness of the soap was evaluated by measuring the absorbency and the elution. After weighing the weight of soap (W ₁ ) into a pin of known weight and immersing it in a 25 ° C constant temperature water bath for 4 hours, the weight was taken out and dried at room temperature for 1 hour (W ₂ ). this is called after the weight after the elution peeled back the binary portion of the flowing water weight (W ₃₎ and, by following equation 1 is calculated, and also the eluted absorb.

(Calculation 1)

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

Dissolution Degree (%) = (W ₃ -W ₁ ) / W ₁ X 100

Absorption means that the larger the value is, the greater the ability to contain water, so that the physical properties are poor. If the value is negative, the soap is dissolved in water. Therefore, the absorbance is a positive value, and the closer to 0, it is not soft, which means that it is excellent. In addition, the elution degree is a negative value because it means the amount of water penetrated into the soap, the larger the value is, the more preferable.

(4) foaming power rating

The foaming force was measured and measured by the Rose-Miles method which is widely used as a general foaming force measuring method. The transparent soap composition was made into a 0.25% aqueous solution, and the volume of bubbles generated at 25 ° C. was measured twice, and the average value thereof was taken.

(5) Evaluation of working process period (aging period after manufacture)

After the preparation, the time taken to solidify after the injection into the mold was measured.

The results measured according to the method are shown in Tables 3 and 4 below.

Evaluation Item Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Transparency 25.4 35.9 32.1 37.3 21.2 9.7 11.4 Hardness 1.56 2.09 1.66 1.74 1.19 1.03 1.11 Absorption degree 8.7 2.9 7.6 4.5 13.5 15.6 14.2 Dissolution -10.5 -7.4 -12.3 -8.9 -30.5 -26.4 -18.7 Bubble degree (mL) 275 230 195 225 230 155 125 Aging period (hour) ~ 5h ~ 2h ~ 2h ~ 2h To 10 h ~ 5h To 10 h

Item Example 5 Example 6 Example 7 Example 8 Example 9 Comparative Example 4 Comparative Example 5 Transparency 27.3 35.3 31.2 36.2 36.8 11.2 15.4 Hardness 1.29 2.04 1.82 1.98 2.07 1.76 1.45 Absorption degree 8.4 3.2 6.3 4.5 7.1 12.8 16.2 Dissolution -14.2 -5.8 -10.2 -8.9 -11.2 -16.2 -23.4 Bubble degree (mL) 260 240 175 230 230 130 180 Aging period (hour) -5h ~ 2h ~ 5h ~ 2h ~ 2h ~ 5h To 10 h

In Table 3 and Table 4, the transparent soap composition of the present invention, by using polyoxyethylene ether and polyoxyethylene silicone alone or mixed, it is possible to improve the transparency, hardness characteristics and softness of the transparent soap, It can be confirmed that it can be shortened.

As mentioned above, the transparent soap composition of the present invention is obtained by using alone or mixed polyoxyethylene alkyl ether and polyoxyethylene silicone, which are nonionic surfactants, in a transparent soap containing soap and anionic surfactant as main cleaning components. It is excellent in transparency and hardness characteristics, and can be prepared transparent soap that does not easily fall off by water absorption when using soap, and does not require a aging period.

Claims (4)

In the transparent soap composition, the composition (a) 1 to 10 weight percent polyoxyethylene alkyl ether or (b) 0.5 to 7 weight percent polyoxyethylene silicone Transparent soap composition comprising a. The method of claim 1, The polyoxyethylene alkyl ether is a compound of formula 1, Wherein said polyoxyethylene silicone is a compound of Formula 2: (Formula 1) RO- (CH ₂ CH ₂ O) _n -H In Formula 1, R is alkyl having 12 to 18 carbon atoms, n is 2 to 15. (Formula 2) In Formula 2, n is 3 to 10. The composition of claim 1, wherein the polyoxyethylene alkyl ether and the polyoxyethylene silicon are included in the transparent soap composition in an amount of 0.5 to 10 wt%. The composition of claim 1, wherein the polyoxyethylene alkyl ether and the polyoxyethylene silicone are included in the transparent soap composition in a weight ratio of 0.1: 0.9 to 0.9: 0.1.