JP6764232B2 - Sophorolipid-containing composition having excellent foaming properties - Google Patents

Description

The present invention relates to a sophorolipid-containing composition containing sophorolipid, and more particularly to a sophorolipid-containing composition having excellent foaming property.

Sophorolipid is an amphipathic lipid produced by microorganisms, mainly yeast, and has a strong surface-active action and excellent biodegradability. Therefore, in recent years, application development has been promoted as a leading role of biosurfactant. There is. As a yeast that produces sophorolipid, a non-pathogenic basidiomycete yeast, Starmerella bombicola (formerly known as Candida bombicola), is well known, and its biosurfactant productivity is cultivated. Since it reaches 400 g or more per liter of liquid, it is suitable for commercial production, and many studies have been conducted using this yeast. The structure of sophorolipid produced by this yeast is shown below.

(Here, in each structural formula, R ¹ and R ² are independently hydrogen or acetyl groups, and n is an integer of 3 to 20).

Sophorolipid is a glycolipid in which a long-chain hydroxy fatty acid and sophorose are bound to each other, and when produced by Starmerella bombicola (formerly known as Candida bombicola), the lactone type and the acid type are approximately 6 to 8 :. It is a mixture of 2-4. The inventors added yeast to a medium containing an extract of seeds of a plant belonging to the genus Madhuca and cultured it under aerobic conditions so as not to deviate from the category of natural products and to have an environmental load. We have proposed a technique for imparting foaming property and a technique for controlling foaming of sohololipid that does not increase the amount of yeast (Patent Document 1).

The surfactant of this mixture has a critical micelle concentration (CMC) of about 35-70 mg / L and a surface tension of 35 to 75 mN / m, which is 10 to 100 minutes of sodium lauryl sulfate, which is often used as a general surfactant. It is a material that exhibits strong surface activity at a concentration of 1 and is easily biodegradable and environmentally significant as compared with sodium lauryl sulfate, which is difficult to biodegrade (Non-Patent Document 1).

Since sophorolipid is a microbial product and mainly contains nonionic components, it has good skin affinity and has already been put into practical use as an agent for improving the permeability of cosmetics. In addition, it has excellent biodegradability and is effective even when added in a small amount, so that it is also being used for dishwashing.

For the above applications, it is better to have less foam, but shampoo, conditioner, body soap, hand soap, face wash, which can maximize the performance of sophorolipid and have great significance in reducing environmental pollution. In cleaning applications such as foams, foaming is required as a measure of detergency, so the current situation is that sophorolipid, which has low foaming properties, is not suitable as a raw material for compositions for such cleaning applications.

In order to solve this problem, a method of adding a foaming agent such as a sulfonic acid-based surfactant or a sulfate-based surfactant can be considered, but consumers consider sulfone from the viewpoint of reducing environmental load and skin irritation. Synthetic foaming agents such as acid-based surfactants and sulfate-based surfactants and silicon, which is a commonly used lubricant, tend to be avoided, and it is desired to use natural raw materials as much as possible. However, the current situation is that there is no suitable product in terms of both cost and performance.

Japanese Unexamined Patent Publication No. 2014-150774

Journal of Bioscience and Bioengineering, vol.108, No.2, p.142-146, 2009.

The present invention uses as little synthetic surfactants as possible, such as sulfonic acid-based and sulfate-based surfactants, to foam sophorolipids, especially shampoos, conditioners, and bodies. Since it is used as a raw material for soaps, hand soaps, and facial cleansing foams, it does not deviate from the category of natural products and does not increase the environmental load, it has high foaming properties, produces fine foam, and is smooth after washing. An object of the present invention is to provide a composition containing sophorolipid that imparts a moist feeling.

The inventors have studied various substances that improve the foaming property of sophorolipid, and found that an amino acid-based surfactant synergistically improves the foaming property of sophorolipid.

That is, the present invention provides a sophorolipid-containing composition containing a solo holic and an amino acid-based surfactant, and containing no or a limited amount of a synthetic surfactant mainly composed of a chemical compound. Is.

According to the present invention, sophorolipid, which is originally not highly foamable, can be provided as a sophorolipid-containing composition which is highly foamable, produces fine foam, and imparts smoothness and moist feeling after washing. In addition, since it is a composition mainly composed of natural products, it is highly safe, and because it is highly biodegradable, it has a small impact on the environment.

Since the solo hollypid-containing composition of the present invention can be used as a raw material for products that require foaming and fineness of foam, it can be used as a raw material for shampoos, conditioners, body soaps, hand soaps, and facial cleansing foams. It has excellent degradability, and foaming is enhanced without increasing the environmental load, foam quality (fineness) is also improved, it is smooth after drying, moist feeling is improved, and dry skin on the hands and skin. It is possible to manufacture products with reduced impact.

In the present embodiment, the sophorolipid is not particularly limited as long as it is produced through a yeast fermentation step instead of a chemical synthesis system. For example, the sophorolipid produced by the method described in JP-A-2014-150774. It is possible to contain water-soluble saponin having high foaming property by using the above, which is preferable because it is possible to obtain not only foaming but also foam having high cushioning property and durability.

Sophorolipid is a mixture of multiple molecular species and usually contains 50% or more of the lactone form. Therefore, in the present embodiment, the sophorolipid is not only a single substance, but also the hydroxyl group at the 1-position of the sugar chain and the hydroxyl group at the 4-position of the second sugar may have a lactone ring in an ester bond. It contains a mixture of a hydroxyl group at the 1-position having a carboxylic acid group at the end via an alkyl group and a sugar chain in which the hydroxyl group is sealed with an acetyl group.

The content of sophorolipid in the sophorolipid-containing composition according to the present embodiment is 0.01 to 5% by weight from the viewpoint that sophorolipid is used not as a main agent of a surfactant but as a surfactant auxiliary agent (CO-surfactant). It is preferably 0.03 to 4% by weight, more preferably 0.04 to 2% by weight, and even more preferably 0.05 to 0.9% by weight.

In the present embodiment, the amino acid-based surfactant is known as a synthetic surfactant derived from a natural product because it is produced using amino acids and fatty acids as raw materials, and has a feature of being mild to the skin. .. The amino acid-based surfactant, when classified by kinds of amino acids in the raw material, glutamate system, data Gaulin type, alanine type, glycine type, can be classified into sarcosine system, using one or two or more of these be able to.

The basic structure of the glutamic acid-based surfactant is acyl glutamate (AGS). Specifically, for example, sodium cocoyl glutamate, triethanolamine cocoyl glutamate, sodium lauroyl glutamate, and sodium lauroyl glutamate (N-lauroyl-L-glutamic acid). Sodium), monosodium lauroyl glutamate triethanolamine salt, hydrogenated monosodium glutamate, monosodium myristoyl glutamate, monosodium stearoyl glutamate, and the like. In the present embodiment, sodium cocoyl glutamate is particularly preferable.

The taurine-based surfactant has an acylmethyl taurine salt (AMT) as a basic structure, and specifically, for example, cocoyl methyl taurine sodium, cocoyl methyl taurine potassium, cocoyl methyl taurine magnesium, lauroyl methyl taurine sodium, stearoyl methyl taurine sodium, Examples thereof include sodium myristylmethyl taurine, sodium oleylmethyl taurine, sodium palmitoyl methyl taurine, sodium cocoyl taurine, and the like.

The alanine-based surfactant has an acylmethylalanine salt (LBA) as a basic structure, and specifically, for example, cocoylmethylalanine sodium, lauroylmethylalanine sodium, lauroylmethylalanine triethanolamine salt, cocoyl alanine triethanolamine salt, Examples include myristylmethylalanine sodium.

The glycine-based surfactant has an acylglycine salt as a basic structure, and specific examples thereof include cocoyl glycine sodium, cocoyl methyl glycine sodium, cocoyl glycine potassium, and cocoyl glycine triethanolamine salt. In this embodiment, sodium cocoylglycine and / or sodium cocoylmethylglycine is particularly preferable.

The sarcosine-based surfactant has an acyl sarcosine salt as a basic structure, and specifically, for example, cocoyl sarcosine sodium, cocoyl sarcosine potassium, cocoyl sarcosine triethanolamine salt, lauroyl sarcosine sodium, lauroyl sarcosine potassium, lauroyl sarcosine triethanolamine salt. , Millistyl sarcosine sodium, and the like.

The content of other surfactants including amino acid-based surfactants in the sophorolipid-containing composition according to the present embodiment is a synthetic surfactant mainly composed of a chemical compound such as a sulfonic acid-based or sulfite-based surfactant. From the viewpoint of improving foaming and detergency without containing, it is preferably 3 to 50% by weight, more preferably 5 to 30% by weight, and even more preferably 6 to 25% by weight.

The blending ratio of the above-mentioned sophorolipid and other surfactants including amino acid-based surfactants is preferably 1: 3 to 1:50, preferably 1: 4 to 1:50, from the viewpoint of foaming and fineness of texture. It is more preferably 40, and even more preferably 1: 5 to 1:30.

In the present embodiment, no synthetic surfactant such as a sulfonic acid-based surfactant or a sulfate-based surfactant is contained, or even if it is contained, a limited amount is contained. .. The limited amount means an amount that does not irritate the skin and does not affect infants and patients with atopic dermatitis, and as a guideline for the content, the content of sophorolipid according to the present embodiment is contained. It means less than 5% by weight based on the total amount of the composition.

Sulfonic acid-based surfactants and sulfate-based surfactants are often used as raw materials for shampoos because they can be produced at low cost, have good foaming properties, and remove stains well. On the other hand, since it is strongly irritating to hair and skin, it has tended to be avoided as a raw material for cleaning compositions in recent years. Examples of the sulfonic acid-based surfactant include sodium linear alkylbenzene sulfonate and sodium lauryl sulfonate. Examples of the sulfate-based surfactant include sodium lauryl sulfate, sodium laureth sulfate, triethanolamine laureth sulfate, and palace-3 sodium sulfate.

The sophorolipid-containing composition according to the present embodiment preferably further contains mukurossi (Sapindus mukurossi) in order to further enhance the foaming property. Since Sapindaceae contains saponin in the pericarp, it is presumed that if the pericarp is crushed into a fine powder and added to the sophorolipid-containing composition according to the present embodiment, the foaming property of the sophorolipid-containing composition is further improved. Will be done. In addition, there are saponins whose functions have been studied in detail in Japan and which are pharmacologically recognized to have anti-ulcer and anti-inflammatory effects (Mi-saponins), and these are used in the sophorolipid-containing composition according to the present embodiment. By adding it, it is possible to give it a pharmacological function such as an anti-inflammatory function. As a result, it is possible to reduce the influence on the hand skin of the beauty salon clerk who often comes into contact with the hand skin every day. Further, an ethanolamine salt may be used for adjusting the viscosity of the composition and preventing precipitation.

The content of Sapindaceae in the sophorolipid-containing composition of the present embodiment is preferably 0.1 to 2% by weight, more preferably 0.2 to 1% by weight, and 0.3 to 1% by weight, from the viewpoint of foaming. It is more preferably 0.9% by weight.

The sophorolipid-containing composition according to the present embodiment is intended to give sophorolipid, which is originally not highly foamable, a highly foamable, fine foam, excellent rinse property, smoothness and moist feeling after washing. , Can be used as a cleaning composition.

Examples of the cleansing composition include shampoo, conditioner, body soap, hand soap, and facial cleansing foam. The cleaning composition of the present embodiment has excellent biodegradability, enhances foaming without increasing the environmental load, improves foam quality (fineness), and is smooth and moist after drying. It is possible to manufacture a product that is improved and the influence of dry skin on the hand skin is reduced.

In addition to the above, the sophorolipid-containing material of the present embodiment can be used as a natural product-derived surfactant, for example, for removing radioactive contamination of soil and groundwater, tertiary recovery of petroleum, laundry detergent, cosmetic base material, and medicated skin care products. It can be used for other purposes.

1. 1. Preparation of Sophorolipid-Containing Composition A sophorolipid-containing composition was prepared in the blending amounts shown in Tables 1 and 2.

2. 2. Evaluation of foam height Using Examples 1 to 7 and Comparative Examples 1 and 2 as samples, a quantitative foaming test was carried out by the Epton tube method. Dissolve each sample in distilled water to a concentration of 1.0%, put 5 ml each in a 50 ml Epton tube of the same diameter, cover, shake up and down 30 times with the same stroke, and then let stand for 10 minutes. Then, the ratio (%) of the foamed portion was determined from the height of the foam portion and the height of the true liquid portion from the upper part of the drainage portion in the Epton pipe. The results are shown in Table 3.

3. 3. Sensory evaluation In consideration of practical evaluation, 8 g of the compositions of Examples and Comparative Examples were added to the left and right parts of the hair, washed for 30 seconds, rinsed for 1 minute, and sensory evaluated during hair washing and after drying. Was done. The results are shown in Tables 4 and 5. In the sensory evaluation, each Example was compared with Comparative Example 1, and each Comparative Example was compared with Example 1. The result of the sensory evaluation was the average of 5 testers.

Claims (5)

A sophorolipid, and amino acid-based surfactants, contains a Sapindus peel powder,
Sohololipid-containing composition. The sophorolipid-containing composition according to claim 1, wherein the amino acid-based surfactant is at least one selected from the group consisting of sodium cocoyl glutamate, sodium cocoyl glycine, and sodium cocoyl methyl glycine. The sophorolipid-containing composition according to claim 1 or 2, wherein the content of the Sapindaceae fine powder is 0.1 to 2 % by weight . A cleaning composition containing the sophorolipid-containing composition according to any one of claims 1 to 3. The cleansing composition according to claim 4, wherein the cleansing composition is at least one selected from the group consisting of shampoo, conditioner, body soap, hand soap, and facial cleansing foam.