WO2017209241A1

WO2017209241A1 - Emulsified composition and cosmetic using same

Info

Publication number: WO2017209241A1
Application number: PCT/JP2017/020434
Authority: WO
Inventors: 忠夫辻
Original assignee: 株式会社カネカ
Priority date: 2016-06-01
Filing date: 2017-06-01
Publication date: 2017-12-07
Also published as: JP2019131473A

Abstract

The purpose of the invention is to obtain an emulsified composition having both excellent storage stability and feel on use. The emulsified composition of the invention is characterized by containing a nonionic surfactant and a biosurfactant as surfactants, also by including an aqueous component and an oily component, the concentration of the nonionic surfactant being 0.1-5 wt%, and the concentration of the biosurfactant being 0.02-5 wt%. The biosurfactant is preferably one or more selected from the group consisting of surfactin, arthrofactin, iturin, and salts thereof.

Description

Emulsified composition and cosmetics using the same

The present invention relates to an emulsified composition and a cosmetic using the same, and more particularly to an emulsified composition containing a biosurfactant such as surfactin and a nonionic surfactant, and a cosmetic using the same. This emulsified composition can be obtained as an oil-in-water type stable emulsion.

The operation of dispersing liquids that do not dissolve each other, such as water and oil, is called emulsification, and emulsions obtained by emulsification are used in a wide range of fields such as pharmaceuticals, cosmetics, paints, washings, fuels, and synthetic rubbers. A surfactant is generally used for emulsification. There are various types of surfactants such as nonions, anions, cations, and amphoterics. Among them, nonionic surfactants have high emulsifying power and are widely used.

However, since the emulsion is an unstable system, even if it is in a uniformly dispersed state immediately after preparation, the emulsion coalesces with time and eventually separates. In Patent Document 1, in an emulsified skin external preparation using glycerin monofatty acid ester as a nonionic surfactant, storage stability is improved by containing microbial-derived lipopeptides and liquid higher fatty acid at 25 ° C. Although there is a description about this, since higher fatty acid is an essential component, stickiness due to that occurs, and it is necessary to increase the amount of surfactant used, etc., in terms of the feeling of use of the emulsion composition was there.

JP 2003-277220 A

The object of the present invention is to solve the above-mentioned problems and to obtain an emulsified composition excellent in both storage stability and usability.

As a result of intensive studies for solving the above-mentioned problems, the present inventors have determined the concentration of the nonionic surfactant and the biosurfactant in the emulsified composition using the nonionic surfactant and the biosurfactant as the surfactant. By setting it within the range, it was found that an emulsion composition excellent in both storage stability and usability can be obtained, and the present invention has been completed. That is, the present invention relates to the following (1) to (4).

(1) An emulsified composition containing a nonionic surfactant and a biosurfactant as a surfactant, and further containing an aqueous component and an oily component, wherein the concentration of the nonionic surfactant is from 0.1% by weight to 5% An emulsified composition in which the concentration of the biosurfactant is 0.02 wt% to 5 wt%.

(2) The emulsion composition according to (1), wherein the biosurfactant is one or more selected from the group consisting of surfactin, arthrofactin, iturin, and salts thereof.

(3) The emulsified composition according to (1) or (2), comprising 0.5% to 99% by weight of the aqueous component and 0.5% to 99% by weight of the oily component.

(4) A cosmetic comprising the emulsified composition according to any one of (1) to (3).

According to the present invention, an emulsion composition having high storage stability can be obtained without using higher fatty acids, and the amount of surfactant used can be reduced. An emulsified composition excellent in both can be obtained.

The emulsion composition of the present invention contains a nonionic surfactant. Nonionic surfactants used in the present invention include sorbitan fatty acid esters, glycerin fatty acid esters, hydrogenated castor oil derivatives, glycerin polyglycerin fatty acids, polyoxyethylene alkyl ethers, polyoxyethylene sorbitan fatty acid esters, polyoxy Examples include ethylene glycerin fatty acid esters, polyoxyethylene polyoxypropylene alkyl ethers, and sucrose fatty acid esters. A nonionic surfactant may be used individually by 1 type, or may use 2 or more types.

Among these, glycerin fatty acid esters are preferably used because of excellent storage stability.

In the present invention, the concentration of the nonionic surfactant is from 0.1% by weight to 5% by weight, and preferably from 0.5% by weight to 3% by weight. When the concentration of the nonionic surfactant is less than 0.1% by weight, the storage stability of the emulsion composition is insufficient, and when it is greater than 5% by weight, the feeling in use may be deteriorated.

The emulsion composition of the present invention contains a biosurfactant. A biosurfactant is a natural compound produced by microorganisms, and generally has high biodegradability and low skin irritation to the human body, and is characterized by extremely high stability to the environment and human body. Biosurfactants used in the present invention include lipopeptide compounds such as surfactin, arthrofactin, and iturin, glycolipids such as mannosyl erythritol lipid, sophorolipid, trehalose lipid, rhamnolipid, fatty acids such as splicrisporic acid, polymers such as emulsan, etc. Or a salt thereof, but is not limited thereto. Biosurfactants may be used alone or in combination of two or more.

Among them, a lipopeptide compound or a salt thereof is preferable because a stabilizing effect of the emulsion composition can be obtained with a small amount, and surfactin, arthrofactin, iturin, or a salt thereof is more preferable, and surfactin or a salt thereof. Is particularly preferred.

Here, surfactin salt is the general formula (1)

[Wherein, X represents an amino acid residue selected from the group consisting of a leucine residue, an isoleucine residue, and a valine residue, R represents a C9-18 alkyl group, M ⁺ represents an alkali metal ion or Shows quaternary ammonium ion]
It is a compound shown by these.

The amino acid residue as X may be L-form or D-form, but L-form is preferred.

“C9-18 alkyl group” refers to a linear or branched monovalent saturated hydrocarbon group having 9 to 18 carbon atoms. For example, n-nonyl group, 6-methyloctyl group, 7-methyloctyl group, n-decyl group, 8-methylnonyl group, n-undecyl group, 9-methyldecyl group, n-dodecyl group, 10-methylundecyl group N-tridecyl group, 11-methyldodecyl group, n-tetradecyl group, n-pentadecyl group, n-hexadecyl group, n-heptadecyl group, n-octadecyl group and the like.

Alkali metal ions are not particularly limited, but represent lithium ions, sodium ions, potassium ions, and the like.

Examples of the quaternary ammonium ion substituent include alkyl groups such as methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, and tert-butyl group; benzyl group, methylbenzyl group, phenylethyl An aralkyl group such as a group; and an organic group such as an aryl group such as a phenyl group, a toluyl group, and a xylyl group. Examples of quaternary ammonium ions include tetramethylammonium ions, tetraethylammonium ions, pyridinium ions, and the like.

Each of the above surfactins and salts thereof may be used alone or in combination.

Surfactin or a salt thereof can be cultivated according to a known method, for example, a strain belonging to a microorganism such as Bacillus subtilis, and can be separated from the culture solution. The culture solution can be used as it is. Moreover, what is obtained by a chemical synthesis method can be used similarly.

In the present invention, the concentration of biosurfactant is 0.02 wt% to 5 wt% (for example, 0.02 wt% to 3 wt% or 0.02 wt% to 2 wt%), preferably 0.05 wt%. % To 3% by weight, more preferably 0.07% to 2% by weight, still more preferably 0.09% to 1% by weight, particularly preferably 0.1% to 0.8%. % By weight. When the concentration of the biosurfactant is less than 0.02% by weight, the storage stability of the emulsion composition is insufficient, and when it is greater than 5% by weight, the excess biosurfactant may adversely affect the feeling of use. .

The emulsion composition of the present invention contains an oil component. The oil component used in the present invention is not particularly limited as long as it is not mixed with water at an arbitrary ratio, but squalane, liquid paraffin, light liquid isoparaffin, ceresin, polyethylene powder, squalene, microcrystalline wax, petroleum jelly. , Hydrocarbons such as liquid isoparaffin, polybutene, mineral oil, beeswax, carnauba wax, candelilla wax, jojoba oil, lanolin, whale wax etc., macadamia nut oil, olive oil, cottonseed oil, soybean oil, avocado oil, rice bran oil, Rice oil, rice germ oil, palm kernel oil, castor oil, rosehip oil, evening primrose oil, camellia oil, horse oil, grape seed oil, coconut oil, meadowweed oil, shea butter, corn oil, safflower oil, sesame oil, etc. Oils and fats, ethylhexyl palmitate, isononanoic acid isono , Esters of isopropyl myristate, ethyl oleate, glyceryl tri (caprylate / caprate), cetyl 2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, diisopropyl sebacate, cholesteryl hydroxystearate, myristic acid , Fatty acids such as stearic acid and oleic acid, silicone oils such as methylpolysiloxane, methylphenylpolysiloxane, amino-modified silicone, higher alcohols such as cetanol and oleyl alcohol, alkyl glyceryl ethers such as batyl alcohol and chimyl alcohol Are preferred. An oil component may be used individually by 1 type, or may use 2 or more types.

In the present invention, the concentration of the oil component is preferably 0.5% to 99% by weight, more preferably 0.88% to 99% by weight, and still more preferably 1% to 98.88%. % By weight, particularly preferably 10% by weight to 50% by weight. When the oil component is in the above concentration range, a stable emulsion can be formed.

The emulsion composition of the present invention contains an aqueous component. Although the aqueous component used by this invention is not specifically limited, Water, a dihydric alcohol, a polyhydric alcohol, saccharides, sugar alcohol, amino acids, and peptides are mentioned preferably. An aqueous component may be used individually by 1 type, or may use 2 or more types.

In the present invention, the concentration of the aqueous component is preferably 0.5% to 99% by weight, more preferably 0.88% to 99% by weight, and still more preferably 1% to 98.88%. % By weight, particularly preferably 50% by weight to 90% by weight. When the aqueous component is in the above concentration range, a stable emulsion can be formed.

In the emulsified composition of the present invention, arbitrary components can be blended within a range that achieves the effects of the present invention. As optional components, for example, lower alcohols such as ethanol and isopropyl alcohol; anionic surfactants, cationic surfactants, amphoteric surfactants, thickeners, ultraviolet absorbers, antioxidants, emollients, Examples include emulsifiers, solubilizers, anti-inflammatory agents, moisturizers, preservatives, bactericides, pH adjusters, dyes, fragrances, powders and the like.

The emulsified composition of the present invention is prepared, for example, by dissolving a nonionic surfactant in an oil component and a biosurfactant in an aqueous component, and adding the oil component little by little while stirring the aqueous component. can do. When water and other components are used in combination as the aqueous component, water may be added after the oil component is added.

The oil component may be added in predetermined amounts (split addition) or continuously (continuous addition).

In the case of divided addition, an amount of 60% by mass or less, preferably 30% by mass or less, more preferably 10% by mass or less of the amount of the aqueous component already added is added at once and stirred to make it uniform. . Add the required amount by repeating it.

In the case of continuous addition, the addition rate is 60% by mass / min or less, preferably 30% by mass / min or less, more preferably 10% by mass / min or less of the amount of the aqueous component already added.

Moreover, when adding other components, even if it adds before adding an oil-based component, even if it adds after dissolving or disperse | distributing to an oil-based component, or after adding all the oil-based components, an oil-based component Any method may be used even if it is added in the middle of addition. The entire amount of the aqueous component may be added first, or a part of the added amount may be used first and the rest added later.

Applications of the emulsified composition of the present invention preferably include cosmetics and the like, for example, basic cosmetics such as creams, lotions, cleansing gels and cleansing creams; makeup cosmetics such as foundations, eye shadows, lip colors and lip glosses Hair cosmetics for hair, styling gel, hair wax, etc .; can be suitably used for shampoos, rinses, hand soaps, body soaps, facial cleansing foams, etc.

The emulsion composition of the present invention is prepared, for example, as follows, but the present invention is not limited thereto.

Example 1
(A) ceteth-20 (polyoxyethylene cetyl ether) 1.98% by weight
(B) Surfactin sodium 0.02% by weight
(C) Squalane 20% by weight
(D) 78% by weight of purified water
(C) was charged with (A) and dissolved at 80 ° C. (this is referred to as (E)). (B) was added to (D) and dissolved at 80 ° C. (this is referred to as (F)). (E) was charged into (E) and stirred at 80 ° C. for 4 minutes using a homomixer to prepare an emulsified composition.

(Example 2)
An emulsified composition was prepared in the same manner as in Example 1 except that the amount of the component (A) was 1.8% by weight and the amount of the component (B) was 0.2% by weight.

(Example 3)
An emulsified composition was prepared in the same manner as in Example 1 except that the amount of component (A) was 1.6% by weight and the amount of component (B) was 0.4% by weight.

Example 4
An emulsified composition was prepared in the same manner as in Example 1 except that PEG-60 hydrogenated castor oil was used as the component (A).

(Example 5)
An emulsified composition was prepared in the same manner as in Example 4 except that the amount of component (A) was 1.8% by weight and the amount of component (B) was 0.2% by weight.

(Example 6)
An emulsified composition was prepared in the same manner as in Example 1 except that glyceryl stearate was used as the component (A).

(Comparative Example 1)
An emulsified composition was prepared in the same manner as in Example 1 except that the amount of the component (A) was 2% by weight and the component (B) was not used.

(Comparative Example 2)
In Example 4, an emulsified composition was prepared in the same manner except that the amount of the component (A) was 2% by weight and the component (B) was not used.

(Comparative Example 3)
An emulsified composition was prepared in the same manner as in Example 6 except that the amount of the component (A) was 2% by weight and the component (B) was not used.

<Stability evaluation>
For the above Examples 1 to 6 and Comparative Examples 1 to 3, the appearance after standing for a predetermined period at 50 ° C. was evaluated. The results are shown in Table 1. In Examples 1 to 6, no separation was observed even after 2 weeks or 8 weeks, and the storage stability of the emulsified composition was excellent. However, Comparative Examples 1 to 3 were after 2 weeks or 8 weeks. Separation and the like were observed, and there was a problem in the storage stability of the emulsion composition.

Claims

An emulsified composition containing a nonionic surfactant and a biosurfactant as a surfactant, and further containing an aqueous component and an oily component, wherein the nonionic surfactant has a concentration of 0.1 wt% to 5 wt%, An emulsified composition having a biosurfactant concentration of 0.02 wt% to 5 wt%.
The emulsion composition according to claim 1, wherein the biosurfactant is at least one selected from the group consisting of surfactin, arthrofactin, iturin, and salts thereof.
3. The emulsified composition according to claim 1 or 2, comprising 0.5% to 99% by weight of the aqueous component and 0.5% to 99% by weight of the oily component.
A cosmetic comprising the emulsified composition according to any one of claims 1 to 3.