KR101331987B1 - Transparent soap composition - Google Patents

Abstract

The present invention comprises 1 to 10% by weight of glycerin monoester of an organic acid and fatty acid mixture, thereby using no triethylamine, minimal or no volatile alcohol, and no need for a long aging period. Provided is a transparent soap composition that is excellent in hardness and color stability and is not easily repelled by water absorption.

Clear soap, hardness, softness, ripening, organic acid, fatty acid, glycerin monoester

Description

Transparent soap composition {TRANSPARENT SOAP COMPOSITION}

The present invention relates to a transparent soap composition, and more particularly, by using no triethanolamine and minimal or no volatile alcohol, no long-term aging period is required, and excellent transparency, hardness and color stability The present invention relates to a transparent soap composition that does not easily recede by water absorption.

Transparent soaps have aesthetic appearance and have been marketed to consumers for many years because they are recognized as milder than opaque soaps. Such transparent soaps can generally be prepared by adding polyhydric alcohols such as glycerin, sugars, and triethanolamine as transparent agents to suppress crystals and induce fine crystals. In one example, U.S. Patent No. 2,820,768 discloses a 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, and inhibiting crystals by administering triethanolamine, glycerin as a clearing agent. In addition, a method of preparing a transparent soap by inducing fine crystals 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 ability to water is easy to fall off when used, there is a problem that the excessive color of the ethanol is contained in the brown color due to sunlight.

In addition, since a fatty acid or fat or oil is dissolved in a lower alcohol such as ethanol and neutralized by adding sodium hydroxide, a transparent soap prepared by adding a moisturizing agent such as sugar, sorbitol, and glycerin is volatilized to reduce its weight. Aging periods ranging from weeks to months are required until the decline stabilizes. Transparent soap according to the above method has the advantage of excellent hardness and less turbidity during use through the aging process, but the finished product can be produced only by processing the surface, it takes a lot of work space and drying time to dry And, there is a disadvantage that the price of the soap is relatively high.

Therefore, it has always been necessary to reduce the maturation period and to minimize the use of volatile alcohols and triethanolamines in the production processes that are commonly used, while maintaining the hardness and transparency of the soap.

As part of this effort, Korean Laid-Open Patent Publication No. 10-2004-0018493 discloses 30 to 60% by weight total fat (wherein 1 to 15% by weight is a salt of 12-hydroxystearic acid or its precursor), one or more polyhydric alcohols. Transparent soap compositions comprising from 20 to 50% by weight and water are described for compositions with good transparency, hardness and foaming properties. However, the above-mentioned transparent soap still contains the problem of requiring a step of aging for a long time over 0-4 weeks depending on the composition.

In order to solve the problems of the prior art as described above, the present invention comprises 1 to 10% by weight of a glycerin monoester of the organic acid and fatty acid mixture, the use of triethanolamine and the use of volatile alcohol with minimal or no aging period It is an object of the present invention to provide a transparent soap composition that can significantly shorten and maintain the hardness and transparency of soap.

In order to achieve the above object, the present invention provides a transparent soap composition comprising 1 to 10% by weight of glycerin monoester of the organic acid and fatty acid mixture.

Preferably, the present invention comprises: a) 20-50% by weight of soap, b) 10-50% by weight of clearing agent, c) 1-10% by weight of glycerin monoester of organic acid and fatty acid mixture, d) anionic or nonionic surfactant. 3 to 10% by weight, and e) 5 to 25% by weight of purified water.

Hereinafter, the present invention will be described in detail.

The soap of a) used in the present invention can be obtained by neutralizing a fatty acid having 10 to 24 carbon atoms, preferably a fatty acid having 12 to 18 carbon atoms or a mixture of fatty acids and a suitable alkali compound. Examples of suitable alkali compounds include sodium hydroxide, potassium hydroxide and alkanol amines and may be mixtures thereof. More preferably, they are C12-C18 fatty acid alkali sodium salts. The soap is preferably included in 20 to 50% by weight, more preferably 30 to 40% by weight relative to the total weight of the transparent soap composition. If the content of the soap is less than 20% by weight may be reduced hardness and hardness, if the content of more than 50% by weight may be excessively high hardness or lowered transparency.

The b) transparent agent used in the present invention includes glycerin, ethylene glycol, propylene glycol, dipropylene glycol, isopentyldiol, 1,3-butylene glycol, polyethylene glycol, sorbitol, mannitol, xylitol, and the like. It can be used alone or in combination of one or more sugars containing polyhydric alcohol or sugar and fructose. The transparent agent is preferably contained in 10 to 50% by weight, more preferably 20 to 40% by weight relative to the total weight of the transparent soap. If the content of the clearing agent is less than 10% by weight, the transparency may be lowered. If the content of the clearing agent exceeds 50% by weight, the hardness may be lowered, or sweating or turbidity may easily occur under high temperature and high humidity conditions.

The glycerin monoester of at least one organic acid and fatty acid mixture of c) used in the present invention is a compound obtained by esterifying a mixture of organic acid and fatty acid with glycerin.

Organic acids that can be used in the present invention are citric acid (Citric acid), lactic acid (Lactic acid), succinic acid (Succinic acid), maleic acid (Maleic acid), malic acid (Malic acid), glutamic acid (Glutamic acid), acetic acid (Acetic acid) And at least one selected from the group consisting of tartaric acid.

In addition, the organic acid is preferably contained 10% by weight or more relative to the total weight of the organic acid and fatty acid mixture, more preferably contained in 10 to 50% by weight, may be used alone or in combination of one or more.

Fatty acid that can be used in the present invention is represented by the following formula (1).

[Formula 1]

R-COOH

In the formula, R is alkyl having 8 to 22 carbon atoms.

The fatty acid may be a saturated fatty acid selected from the group consisting of caprylic acid, capric acid, lauryl acid, myristic acid, palmitic acid, and stearic acid; Unsaturated fatty acids selected from the group consisting of oleic acid and linolenic acid; And mixed fatty acids selected from the group consisting of coconut fatty acids and palm fatty acids, and may be used alone or in combination of one or more thereof.

The glycerin monoester of the organic acid and fatty acid mixture may be used alone or in combination of one or more thereof, and typical examples thereof include glycerin monoester of citric acid / lactic acid / coconut fatty acid mixture and glycerin monoester of citric acid / lactic acid / linolenic acid / oleic acid mixture. Can be mentioned.

The glycerin monoester of the organic acid and fatty acid mixture is preferably included in 1 to 10% by weight, more preferably 2 to 7% by weight relative to the total weight of the transparent soap. If the content of glycerin monoester of the organic acid and fatty acid mixture is less than 1% by weight, the effect of regression may be reduced by transparency, hardness, and water absorption.If it exceeds 10% by weight, the transparency is lowered and water absorption during use is reduced. Can be easily retracted by

 The surfactant of d) used in the present invention is to be used for 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, isocionate esters of higher fatty acids and methyltaurine acid sodium salts or methyltaurine acid potassium salts of higher fatty acids. It can mix and use the above. The anionic surfactant is preferably included in 3 to 10% by weight relative to the total weight of the transparent soap composition, when the content of the anionic surfactant is less than 3% by weight, the degree of foaming and hardness may be lowered, exceeding 10% by weight In this case, the water absorption may be high, resulting in a soft soap and loss of transparency.

The nonionic surfactants may be conventional nonionic surfactants and may be sugar amides and reaction products of organic hydrophobic compounds that may be aliphatic or alkyl aromatic with alkylene oxides. The nonionic surfactant is preferably included in 3 to 10% by weight relative to the total weight of the transparent soap composition, when the content of the non-ionic surfactant is less than 3% by weight, the transparency improvement effect may be lowered, more than 10% by weight In this case, the water absorption rate is increased, the soap becomes soft, the transparency may be lost, and the washing power may be reduced.

As the purified water of e) used in the present invention, purified water used in conventional soap production may be used. The purified water is preferably contained in 5 to 25% by weight, more preferably 10 to 20% by weight relative to the total weight of the transparent soap composition. If the content of purified water is less than 5% by weight, the hardness is increased during manufacturing, making it difficult to manufacture, transparency may be lowered. If it exceeds 25% by weight, hardness may be lowered or transparency may be lowered.

The transparent soap composition of the present invention composed of the above components may be blended with components such as moisturizers, conditioning agents, pigments, flavoring agents, chelating agents, ultraviolet absorbers, antioxidants and bactericides as necessary within a range that does not impair the above-mentioned action. It may be, but is not limited to such.

Hereinafter, preferred examples are provided to help understanding of the present invention, but the following examples are provided only to illustrate the present invention, and the protection scope of the present invention is not limited to the following examples.

[Example]

Example  1 to 4 and Comparative Example  1 to 6

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 65 to 70 ° C, 1.0% by weight of fragrance was mixed and stirred uniformly, poured into a mold of a certain shape, cooled, and solidified to prepare a transparent soap.

ingredient Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Mixed fatty acid soap 35 35 35 35 40 35 35 35 35 40 glycerin 17 17 17 17 7 17 17 17 17 15 Propylene glycol 6 6 6 6 - 6 6 6 6 - Sorbitol 12 12 12 12 - 12 12 12 12 12 ethanol - - - - - - - - - 20 Triethanolamine - - - - 20 - - - - - Glycerine Monoesters from Citric Acid / Lactic Acid / Coconut Fatty Acid Mixture 2 5 - 3 - - 12 - - - Glycerine Monoesters from Citric Acid / Lactic Acid / Linolenic Acid / Oleic Acid Mixtures - - 5 3 - - - - - - Coconut Fatty Acid Glycerin Monoester - - - - - - - 5 - - Linolenic acid glycerin monoester - - - - - - - 5 - Polyoxyethylene (3) Lauryl Sulfate 7 7 7 7 7 7 7 7 7 - Tetrasodium ID 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 incense One One One One One One One One One One Purified water Up to 100% by weight

Using the transparent soaps prepared in Examples 1 to 4 and Comparative Examples 1 to 6, the transparency, hardness, softness, color stability and maturation period were evaluated in the following manner, and the results are shown in Table 2 below. .

(1) Transparency: The transparent soaps prepared in the compositions of Examples 1 to 4 and Comparative Examples 1 to 6 were cut to a thickness of 20 mm, and the transmittance was measured with a Spectro Color Meter SE 200 using the sample. It was.

(2) Hardness: The hardness of the transparent soap prepared in the compositions of Examples 1 to 4 and Comparative Examples 1 to 6 was measured using a hardness meter (Fudoh Rheo Meter). The maximum load value was measured by applying the center portion of the transparent soap to a 20 mm / min speed up to 10 mm depth using a pointed tip adapter.

(3) Deadness due to water absorption: After weighing the weight (W ₁ ) of the transparent soap prepared in the compositions of Examples 1 to 4 and Comparative Examples 1 to 6, and then put it in a pin for 2 hours in a 25 ℃ constant temperature water bath After each deposition, the weight (W ₂ ) taken out and dried at room temperature for 1 hour was taken as the weight after absorption, and the absorbance was calculated by the following Formula 1.

[Equation 1]

Absorption (%) = (W ₂ - W ₁ ) / W ₁ × 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, the less soft it is, the better the dryness due to water absorption.

(4) Color stability: After the transparent soap prepared in the composition of Examples 1 to 4 and Comparative Examples 1 to 6 in a UV tester for 2 days in a constant temperature room at 45 ℃ condition for 1 month, the low temperature ( The soap was stored at 4 ° C.) and evaluated according to the following criteria.

division Evaluation standard ◎ No change in sample color ○ Very very slightly discolored △ Discolored X Sample color browned

(5) Aging period: After the transparent soap prepared in the compositions of Examples 1 to 4 and Comparative Examples 1 to 6 were added to the mold, the time taken for solidification was measured.

ingredient Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Transparency (%) 45.0 51.0 48.0 47.0 43.0 14.2 8.4 18.4 21.0 30 Dyne 1.32 1.56 1.63 1.57 1.28 0.8 2.5 1.88 2.3 4.5 Absorbency (%) 3.4 1.5 1.0 2.0 13.0 5.0 13.0 4.3 6.2 3.5 Color stability (UV) ◎ ◎ ◎ ◎ X ◎ ◎ ◎ ◎ ◎ Color stability (45 ℃) ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Aging period (hour) ~ 10h ~ 8h ~ 6h ~ 8h ~ 12h ~ 8h ~ 10h ~ 8h ~ 8h 4 weeks

In Table 2, the transparent soap composition (Example 1-4) of the present invention is a color stability compared to the transparent soap composition (trialol 1) using triethanolamine by using alone or mixed with the glycerin monoester of the organic acid and fatty acid mixture This improved, the transparency and hardness compared to the transparent soap composition (Comparative Example 2) that does not use the glycerin monoester of the organic acid and fatty acid mixture, it was confirmed that the phenomena due to water absorption improved. In addition, it was confirmed that the transparency is excellent compared to the transparent soap (Comparative Example 6) prepared by aging using ethanol for a long time, it is possible to significantly shorten the aging period. However, the soap composition (Comparative Example 3) using 10% by weight of glycerin monoester of the organic acid and fatty acid mixture can be confirmed that the hardness is too high and the transparency is significantly reduced. In addition, it was confirmed that the transparency of the soap composition (Comparative Examples 3 and 4) using fatty acid glycerin monoester rather than the glycerin monoester of the organic acid and fatty acid mixture was remarkably decreased.

As described above, the transparent soap composition according to the present invention uses only 1 to 10% by weight of glycerin monoester of an organic acid and a fatty acid mixture alone and mixed with soap as a main cleaning component, thereby minimizing volatile alcohol without using triethanolamine. It is possible to prepare a transparent soap that does not require a long period of aging due to use or not used at all, and is excellent in transparency, hardness and color stability and does not easily recede by water absorption.

Claims (6)

A transparent soap composition comprising 1 to 10% by weight of glycerin monoester of an organic acid and fatty acid mixture, The organic acid may be citric acid, lactic acid, lactic acid, succinic acid, maleic acid, maleic acid, malic acid, glutamic acid, acetic acid, and tartaric acid. ) Is one or more selected from the group consisting of The fatty acid may be a saturated fatty acid selected from the group consisting of caprylic acid, capric acid, lauryl acid, myristic acid, palmitic acid, and stearic acid; Unsaturated fatty acids selected from the group consisting of oleic acid and linolenic acid; And a mixed fatty acid selected from the group consisting of coconut fatty acids and palm fatty acids. The method of claim 1, a) 20-50% by weight of soap; b) 10 to 50% by weight of a clearing agent; c) 1 to 10% by weight glycerin monoester of organic acid and fatty acid mixture; d) 3 to 10 weight percent of anionic or nonionic surfactants; And e) 5 to 25% by weight of purified water Transparent soap composition comprising a. The transparent soap composition of claim 1, wherein the soap is a neutralized product of a fatty acid having 10 to 24 carbon atoms and an alkali compound. delete The transparent soap composition of claim 1, wherein the organic acid comprises 10 to 50 wt% of the total weight of the organic acid and fatty acid mixture. delete