KR960015166B1 - Cosmetic soap compositions - Google Patents

Abstract

The composite comprises cosmetic soap base, antioxydant, perfume, and fruit acid fatty esther which comprises at least one selected from citric acids, tartaric acids, maleic acids and lactic acids, wherein the soap base comprises metal alkalide, synthetic surfactant or complex soap, and fruit acid fatty esther is made by reacting fruit acid with fatty group alcohol.

Description

Cosmetic soap composition

The present invention relates to a cosmetic soap composition containing a fruit acid fatty ester. More specifically, the present invention contains a fruit acid fatty ester prepared by reacting a fruit acid with a straight or branched aliphatic alcohol having 8 to 20 carbon atoms to provide excellent moisturizing effect on the skin, excellent feeling, long-term use The present invention relates to a cosmetic soap composition having excellent stability even during storage.

Cosmetic soaps are typically prepared by chemical neutralization of weakly acidic fatty acids with strongly alkaline caustic so the pH of the final soap is slightly alkaline. Because of this, excessive use of soap during skin cleansing may cause the skin to become dry and rough due to degreasing of sebum and descaling of stratum corneum. In view of this, relatively low pH synthetic surfactant soaps or complex soaps and the like have been studied to add a large amount of skin moisturizing and cosmetic ingredients or to suppress excessive degreasing. Skin moisturizers and solubilizers include high fatty acids, higher fatty alcohols, animal and vegetable fats and fats, lanolin derivatives and overfat agents and plant extracts such as ginseng, cucumber, alloke, and wormwood. Therefore, to improve the texture of the skin after washing and there is a cosmetic effect, but in order to provide a sufficient cosmetic effect, there is a problem in that the stability of the long-term storage is not good and the physical properties are poor by the addition of a large amount and the addition of a large amount.

In order to alleviate these drawbacks, soaps with fruit acids have been proposed in the prior art, which promote the production of cells and prevent the aging of the skin. In general, fruit acids are citric acid, tartaric acid, lactic acid, and nitric acid contained in various fruits such as lemon, pineapple, apple, etc., and because they have a hydroxyl group in the alpha position, they are usually called alpha-hydroxy acids. Their structure is as follows.

However, since these fruits are weakly acidic, excessive amounts of soap may decompose the soap, which may adversely affect the stability of the soap.

In order to solve this problem, there is also a method of neutralizing the fruit acid with alkali and adding the same, and in US Pat. No. 5089531 and UK Pat. Is also presented.

However, when an excessive amount of such an ester compound is used, the physical properties of the soap are significantly lowered and the skin moisturizing effect is not excellent.

Accordingly, the present inventors have studied to solve these problems, and as a result, when the fruit fatty acid ester prepared by reacting various fruit acids with a linear or branched aliphatic alcohol having 8 to 20 carbon atoms is added to the soap, the skin moisturizing effect and the feeling of use are improved. It has been found to be excellent, significantly improved physical properties, excellent stability even during long-term storage and to complete the present invention.

The present invention relates to a cosmetic soap composition containing 0.1 to 15% by weight of fruit acid fatty acetate.

In the cosmetic soap composition of the present invention, the fatty acid fatty ester is conjugated with trialkyl citrate, dialkyl tartrate, dialkyl maleate, monoalkyl lactate, and the like, in addition to citric acids and tartaric acid. esters prepared by reacting a fruit acid called α-Hydroxy acids, such as acids, maleic acids, and lactic acids, with a straight or branched aliphatic alcohol having 8 to 20 carbon atoms. Anything is possible. The structural formulas of the four kinds of fruit acid fatty esters are as follows.

Wherein R represents a straight or branched alkyl having 8 to 20 carbon atoms.

In the cosmetic soap composition of the present invention, the content of the fruit acid fatty ester is suitably 0.1 to 15% by weight, preferably 1 to 10% by weight in the total composition. When used less than 0.1% by weight is excellent in workability and stability but low in feeling and moisturizing effect, when used in excess of 15% by weight is excellent in feeling and moisturizing effect but poor workability, there is a disadvantage that the stability is lowered.

The cosmetic soap composition of the present invention provides an excellent moisturizing effect on the skin, excellent in use, and excellent stability even in long-term storage.

Fruit acid fatty esters vary from liquid to wax, depending on the carbon number, and when mixed with soap, they are easily emulsified and adsorbed on the skin, so they have excellent skin moisturizing effect, maintain skin activity and prevent skin aging. As it gives a soft texture to the skin without sticky properties, it has a good feeling of use, and it has an advantage of excellent absorption in the skin.

In the cosmetic soap composition of the present invention, examples of the soap base include alkali metal soaps, synthetic surfactant soaps, and the like. Alkali metal soaps are alkali metal salts of fatty acids having 8 to 20 carbon atoms, wherein the fatty acids are obtained from vegetable oils such as palm oil, palm oil, soybean oil, castor oil, olive oil, palm kernel oil, and animal fats and oils such as tallow, pig oil, sun palm oil and fish oil. High alkali metals are prepared by neutralizing with fatty acids alone or by mixing sodium or potassium and the like.

The synthetic surfactant soap may be any one of sodium cocoyl isethionate, sodium acyl glutamate, sodium coco monoglyceride sulfate, sodium lauryl sulfate, sulfosuccinate and the like.

The cosmetic soap composition of the present invention may contain components commonly used in cosmetic soaps. The cosmetic soap typically contains about 5 to 20% by weight of water, and can be added 0.1% by weight or less of butylate hydroxy toluene (BHT), which is a common antioxidant, and is a conventional additive such as perfume, dye and other additives. Can be added.

The fruit acid fatty ester may be added by mixing with the perfume and may be mixed alone.

The soap manufacturing method is carried out by mixing and extrusion molding in a conventional soap manufacturing method.

The present invention will be described below with reference to Examples, but these Examples do not limit the technical scope of the present invention.

[Examples 1-3 and Comparative Examples 1-3]

Next, using the ingredients shown in Table 1, soap was prepared according to a conventional soap production method.

[Examples 4 to 6 and Comparative Examples 4 to 7]

Examples 4 to 6 and Comparative Example 4 were molded after mixing sodium cocoyl isethionate in an alkali metal soap, Comparative Examples 5 to 7 were prepared in the same manner as in Examples 1 to 3 and Comparative Examples 1 to 3. It was.

The moisturizing power, usability, workability and stability at 40 ° C. of the soaps prepared in Examples 1 to 6 and Comparative Examples 1 to 7 were tested as follows, and the results are shown in Tables 3 and 4.

Stability Test at 40 ℃

The soaps prepared in Examples and Comparative Examples were stored in a thermostat at 40 ° C. for 1 month and then tested for discoloration and odor. The test results were determined as follows.

○: excellent stability

△: slightly discolored

×: discoloration and bad smell

Workability test

The soap prepared in Examples and Comparative Examples was tested for workability and softness, and the test results were determined as follows.

◎ very good

○: good

△: normal

×: bad

××: very bad

Feeling test

After evaluating 20 users under the same conditions, the average value of 20 people was obtained by completely removing the moisture of the skin and comparing the feeling of use with the skin.

5 points: very excellent

4 points: Excellent

3 points: Normal

2 points: bad

1 point: very bad

Moisturizing Test

The soaps prepared in Examples and Comparative Examples were diluted with distilled water to form a 5% aqueous solution, and 0.1 ml of the aqueous solution was applied to the inside of the arm at a size of 50 cm x 5 cm, and then, Skincon 200 (Skincon 200). ) Was used to measure the moisture loss over time. Immediately after the solution was applied, the water loss was obtained over time even after the application was made to 40 before application.

As a result of measuring the workability, usability, 40 ° C stability and moisturizing effect of the soap compositions of Examples and Comparative Examples, when the fruit acid fatty ester is used in an amount of more than 15% by weight, the feeling and the moisturizing effect are very good, When not added, fruit acid fatty ester, or less than 0.1% by weight can be seen that the workability and stability, but the feeling and moisturizing effect is not good. Therefore, in order to prepare a soap having good skin moisturizing effect, usability and stability and excellent workability, it is preferable to contain 0.1 to 15% by weight of fruit acid fatty ester, more preferably 1 to 10% by weight. You can see that it is good.

Claims (6)

A cosmetic soap composition comprising a cosmetic soap base, an antioxidant, and a perfume, wherein the cosmetic soap composition contains 0.1 to 15% by weight of a fatty acid fatty ester. The composition according to claim 1, which contains 1 to 10% by weight of fruit acid fatty ester. The composition according to claim 1, wherein the fruit acid fatty ester is one or two or more selected from trialkyl citrate, dialkyl tartrate, dialkyl maleate and monoalkyl lactate. The composition of claim 1 wherein the cosmetic soap base is an alkali metal soap, a synthetic surfactant soap or a complex soap. The composition according to claim 1, wherein the fruit acid fatty ester is prepared by reacting the fruit acid with an aliphatic alcohol having a straight or branched chain having 8 to 20 carbon atoms. 6. The composition according to claim 5, wherein the fruit acid is one or two or more selected from citric acid, tartaric acid, nitric acid and lactic acid.