JPS59207994A - Liquid detergent - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid cleansing agent, and particularly to a liquid cleansing agent that has excellent foaming properties and foam feel, does not cause sedimentation over time, and has a mild feeling of irritation to the skin and hair. Regarding drugs.

Conventionally, liquid detergents such as SHAN F-1 facial soap and kitchen detergents have been made using anionic 1-ion compounds such as sodium alkylbenzene sulfonate, higher alcohol sulfur-limited esters, polyoxyethylene alkyl ether image salts, and higher fatty acid salts. The main ingredients used are surfactants and nonionic surfactants such as fatty acid soethanolamide.

In recent years, attempts have been made to incorporate protein hydrolysates, acylated tongue/gourmet hydrolysates, amino acids, etc. into the above-mentioned liquid detergents in order to improve the finish of hair and soften the effect on the skin. ing. However, these tongues
Glycine G4 has a strong odor that makes it difficult to apply in cosmetics, and it is insufficient in its mild effect on the skin.

Examples of surfactants that cause less skin irritation include nonionic surfactants such as glycerin higher fat esters, polyoxyethylene alkyl phenols, polyoxyethylene alkyl ethers, sucrose higher fatty acid esters, and sorbitan higher fatty acid esters. However, although these surfactants are hypoallergenic and easy to clean, they do not foam well and do not meet the requirements for cleaning agents.

Recently, acylated amino acids have been attracting attention as surfactants that foam well and are hypoallergenic.

In general, amino acid-based surfactants are said to be decomposed into long-chain fatty acids and amino acids, so even if they are ingested, they will not be broken down and accumulated in the body. It is considered to be a suitable surfactant for kitchen detergents and shampoos. N-acylglutamate is a typical amino acid-based surfactant, but this surfactant has poor foaming properties in the presence of dirt, and when applied to shanggu, the basic performance of foam feel and creaminess is poor. Due to the poor feel, various improvements have been attempted so far. For example, in Japanese Patent Application Laid-Open No. 47-42809, N-
It is stated that a mixture of a long-chain acyl acidic amino acid salt and a fatty acid soalkanolamide has improved foaming even in the presence of dirt. However, according to the experiments conducted by the present inventors, the foam-enhancing effect of fatty dialkanolamide is limited to PH
Although it is noticeable at pH 7 or higher, no sufficient foam increasing effect was observed at pH 5 to 6, which is lukewarm to hair and skin. Further, Japanese Patent Publication No. 50-22803 describes that the detergency is improved by mixing an N-long chain acyl amino acid salt and a fat-soluble nonionic surfactant. Furthermore, JP-A-54-120610 discloses that by mixing N-acyl glutamate and an alkyl phosphate or a polyoxyalkyl phosphate, good cleaning power and cleaning properties can be obtained even in the presence of oil stains. It is described that it exhibits foaming power. However, the present inventors conducted various studies regarding these conclusions and found that the foam performance and creamy feel of the foam as a shampoo were still insufficient. In addition to these agents, there are N-acyl N-alkyl amino acid salts, but like N-acyl glutamic acid salts, they do not form foam well in the presence of oil stains, and the creaminess of the foam is also poor. Although there have been attempts at improvements as shown in Japanese Patent Publication No. 50-33684, these improvements have not been sufficient, especially in the creaminess of the foam, as described above.

As explained above, amino acid surfactants have advantages such as high safety and mild effects on the skin and hair, but they are also used in shampoos and facial soaps such as foaming and creamy feeling. It has the disadvantage that it does not sufficiently satisfy the necessary basic performance, so it has been difficult to apply it to such biconvex surfaces.

An object of the present invention is to provide a liquid detergent that is highly safe, has a mild action on the skin and hair, has excellent foaming power, and is resistant to settling over time. There is a particular thing.

The present inventors have conducted research into ways to improve foam performance while taking advantage of the advantages of amino acid surfactants. H? As a result of intensive efforts, it was found that the above object could be achieved by combining the N-acylamino acid salt with an extract of birch elongation and/or xylem. According to the liquid cleaning agent of the present invention, , foam performance such as foaming and creamy feel of the foam is greatly improved without sacrificing the safety and warming effect on skin debris and hair, which are the advantages of amino acid surfactants. Excellent durability and long-term stability.

The details of the liquid cleaning agent of the present invention will be explained below.

The acyl group of the N-acylamino acid salt blended in the liquid cleaning cream of the present invention is a lauroyl group, myristoyl group, zolmitoyl group, etc., and the amino acids are glutamic acid, glycine, beta-alanine base; These N-
Salts of acylamino acids include sodium, lithium, monoethanolamine, noethanolamine, triethanolamine, and the like. Note that N-acyl N-alkyl amino acid salts can also be included in the N-acyl amino acid salt of the present invention. In this case, the alkyl group is a methyl group, ethyl group, propyl group, inpropyl group, etc.

Preferred N-acylamino acid salts include N-lauroylglutamic acid, N~lumiristoylglutamine, N~
・N-acyl amino acids such as glumitoyl glutamic acid, N-myristoyl beta-alanine N-/lumitoylpeta-alanine, and N-lauroyl N-ethylglycine, N-lauroyl N-isoglobilglycine,
N-acyl N such as N-lauroyl sarcosine, N-mi')stoyl dercosine leu/l/N-methyl beta-alanine, etc.
-There are various types of alkylamino acids such as sodium, lithium, monoethanolamine, jetanolamine, and triethanolamine.

The blending amount of the monoacylamino acid salt is preferably 3 to 30% by weight, more preferably 5 to 20% by weight, based on the entire detergent composition. Within this range, particularly remarkable effects are exhibited.

The birch bark and/or xylem extract (which is one of the constituent components of the liquid cleaning agent of the present invention) is a solution obtained by treating birch bark and/or xylem as follows.

The birch bark and/or xylem is cut into small pieces and air dried. Add an appropriate amount of water-ethanol mixed solvent to this dry product,
After soaking for 1 to 2 weeks, the jjh hearts are separated. This extract is stored in a cool, dark place for several days and then filtered.

Betula al.
It is a deciduous tree with the scientific name of -ba).

Extracts of birch bark and/or xylem contain betulin, a member of the lupine trityl group.
It contains a large amount of , saponin, and tannin, and also contains a small amount of tannin, essential oil bitter (#jY flavor component), betulosid s, etc. #j
The bark contains 10% betulin and up to 15% tannins.

The preferred blending amount of birch bark and/or xylem extract is 0.0005 to 30% by weight, more preferably 0% by weight of the entire cleaning composition, calculated as evaporation residue after 6 hours at 105°C. ,05 to 10.0% by weight. 0.0005
When the weight φ is not shouldered, the fruit of the present invention is difficult to develop, and the weight is 30
．． If it exceeds 0 quintillion lids, the product will tend to settle over time.

As mentioned above, improving the foaming performance of amino acid-based surfactants is a major issue, and it is necessary to improve foaming properties while taking advantage of their characteristics such as safety and mild action against skin debris and hair V. However, the present invention solves these problems and makes it possible to apply amino acid-based surfactants to liquid cleaning agents such as Shank 0-. Improvement of this foam property by the filtration agent of the present invention +d, N-
This is thought to be due to mixed micellization of acylamino acid salts and extracts of bark and/or xylem of Shira Chikara.

Additionally, when birch bark and/or xylem extract is added, precipitation during storage is less likely to occur compared to when naponine is added alone. This indicates that components other than saponin effectively contribute to storage stability.

The liquid detergent of the present invention may contain anionic, cationic, nonionic, and amphoteric surfactants in addition to optional ingredients. Examples of such surfactants include higher alcohol sulfates, alkylbenzenesulfonic acid t=<, K chain alkylbenzenesulfonate, alkylna, phthalene sulfonate, alkyl phosphate, polyoxyethylene sulfate, α
- other ionic surfactants such as olefin sulfates,
Polyoxyethylene alkyl ether, polyoxyethylene alkylphenol ether, sorbicun g umami b
There are nonionic surfactants such as esters and polyoxyethylene acyl esters, cationic surfactants such as alkylamine salts and quaternary ammonium salts, and amphoteric surfactants such as alkyl betaines. These surfactants can be used alone or in a suitable combination of two or more.

Furthermore, the liquid cleaning agent of the present invention also contains, as additional components,
For example, inorganic building blocks such as sodium tripolyphosphate, sodium metasilicate, and Glauber's salt, CMC, lower alcohols, antifoaming agents, fluorescent dyes, coloring agents, and perfumes can also be blended.

Next, we will explain the powder cleaning agent of the present invention in detail in the following experimental examples. Explain.

Evaluation (lB) of skin dregs was conducted using the following two methods (1) and (2).

(1) Official review of blood body〃1〃purifying agent i.[1 formation? The evaluation was conducted using a 11% aqueous solution (35° C.) using a hand/dip immersion test conducted by 10 testers. U
The degree of roughness of the skin on the hands after 24 hours is determined visually by Y+J using the following criteria.

○: Hardly any change in the dermal mouth 51 △: Partial dryness change in the horny surface layer of the dermatology 11 ×: More than 30% of the keratin exfoliation changes (2) BSA molecular ellipticity of bovine serum albumin This evaluation uses molecular beak circularity (BSA molecular ellipticity) as an indicator.

The method for measuring the BSA molecular circularity is as follows. That is, after mixing 100 ppm of bovine serum albumin and a liquid detergent composition, a sodium phosphate buffer solution was added to give a concentration of 5 oInM, and the mixture was washed at 25°C with JASCT)CD Spe.
Circular dichroism is measured using a ctropolarimeter and the molecular beak circularity is determined. By the way, the molecular ellipsoidal PF ratio of undenatured bovine blood albumin is -11.3X.
10 dt4=an/decimol. In addition, it has been confirmed that those having a molecular ellipticity equivalent to that of bovine serum albumin and showing no denaturation cause almost no irritation to skin debris. (The numerical unit in the table is -[θ) x 1o-'. ] Origin 1: A 6% aqueous solution of liquid detergent composition 2CNa/(25C) was collected in a 100 nl syringe, and 0.2.9 ml of liquid lanolin was added as VC artificial stain. After 20 strokes per second, L7.1 minute later, the foam height (+nl) is measured.

Foam Feeling (Sensory Evaluation) Hair is divided into two parts, 3g of comparison sample and test sample are applied to each side, and after lathering, the feel of the foam is evaluated by 10 testers according to the following criteria. In addition, polyoxyethylene alkyl ether sodium sulfate (average number of moles of EO added p=
3. Alkyl group・ 12. /c, , = 1/1) was used.

3 + 10: The feel of AES-Na J rainbow foam is clearly excellent.

+: Slightly more foamy than AES-Na (good FL).

Examiner: The feel of foam is similar to that of AES-Na.

-: AES-Na has less foamy feel.

--: Much more foamy than AES-Na! It's touch is poor.

Storage stability test A sample solution was prepared and stored at 45°C for one month, and the presence or absence of precipitate was visually determined.

×: With sinking ○: Without sinking Test Example 1 A liquid cleaning composition of 14 persimmons having the composition shown in Cloth-1 below was used.
4 were made and their performance was evaluated. The results are shown in the same table. In addition, the compounding amount in the table is weight M%.

As is clear from the table, the cleaning compositions (Examples 1 to 5) containing both N-acyl amino acid and birch bark extract showed inferior performance, whereas birch's Cleaning compositions containing no bark extract (Comparative Examples 1 to 9)
) have poor performance.

Test Example 2 The storage quality of the liquid cleaning composition shown in Table 2 below was evaluated. The results are shown in the same table.

Claims (1)

[Claims] A liquid cleaning agent containing an N-acyl amino acid salt and birch bark and/or xylem extract.