CN115252522A

CN115252522A - Composition for external application to skin

Info

Publication number: CN115252522A
Application number: CN202210962037.7A
Authority: CN
Inventors: 韩扬; 曲睿; 渡边启
Original assignee: Shiseido Co Ltd
Current assignee: Shiseido Co Ltd
Priority date: 2018-11-12
Filing date: 2018-11-12
Publication date: 2022-11-01
Also published as: CN111166701B; WO2020098355A1; JP7350067B2; CN111166701A; JP2022507139A; TW202017559A

Abstract

The present invention relates to a composition for external use on skin, comprising: (A) An active ingredient of a grain fermentation product obtained by fermenting grains, (B) a thickening agent, wherein the thickening agent (B) is selected from polyacrylic acid and derivatives thereof.

Description

Composition for external application to skin

The application is a divisional application of Chinese patent application with the application number of 201811339073.8, the invention name of "skin external preparation composition" and the application date of 2018, 11 months and 12 days.

Technical Field

The invention belongs to the technical field of skin care products, and relates to a composition system with a synergistic tackifying effect, in particular to a skin external agent composition.

Background

Skin external agent compositions are widely used in cosmetic products, and such compositions generally include an aqueous system and an oily system.

Aqueous systems, particularly oil-in-water compositions, are widely used in cosmetic products to provide a refreshing feel to humans while performing specific functions. In the oil-in-water composition, water or an aqueous material is used as a continuous phase, and an oily component is used as a dispersed phase, so that a liquid or semisolid system is formed.

In general, oil-in-water compositions contain various active ingredients to achieve moisturizing, nutritional supplementing, protective, or repairing effects. Meanwhile, in order to stably preserve the above-mentioned various active ingredients in the composition for a long period of time, various additives, such as various emulsifiers, stabilizers, thickeners, preservatives, etc., may be added.

On the other hand, in order to achieve various desired functions of cosmetics, there is a need to attempt to use various active ingredients in combination. In such cases, for oil-in-water compositions comprising multiple active ingredients, the stability of the system is important. For example, due to the simultaneous presence of a plurality of active ingredients, phase separation and the like easily occur inside the system during production, transportation, storage or use, resulting in deterioration of the appearance of the cosmetic. Or, for example, the presence of multiple active ingredients, such that the formation of stable oil phase droplets suspended or dispersed in the desired form in the aqueous continuous phase presents operational difficulties. On the other hand, the introduction of more active ingredients, often leads to the use of more or greater amounts of additives. Therefore, the safety of the product is also a concern. For example, in general, cosmetic ingredients derived from natural materials are more frequently used for reasons of safety in use, environmental friendliness in production, and better affinity to the human body, and for example, nonionic surfactants such as polyoxyethylene alkyl ethers and sorbitan fatty acid partial esters have been mainly used in the past for emulsification of cosmetics. However, although those surfactants inevitably have a different degree of irritation to the skin, and therefore, the amount of the surfactant to be used is reduced as much as possible, and there are cases where emulsification without using these surfactants is attempted, problems tend to occur in the uniformity, stability and the like of an emulsion, and satisfactory emulsions are not necessarily obtained.

Further, the use of emulsifiers derived from natural substances is discussed, and at present, the use of grain fermentates as emulsifiers or stabilizing ingredients is also known, for example:

reference 1 discloses a product LAFR-a obtained by fermenting rice as a raw material, and studies surface tension and interfacial tension of LAFR-a, emulsification behavior exhibited by LAFR-a, and oxidation resistance of a suspension system containing LAFR-a.

Reference 2 discloses a cosmetic water containing a fermented rice bran, which contains 0.01 to 10% by mass of a fermented rice bran, and which has a low viscosity of 1000mPa · s or less.

Reference 3 discloses an emulsification aid which is mainly composed of lactic acid bacteria fermented rice obtained by fermenting rice with lactic acid bacteria. Fermented rice obtained by fermenting rice with lactic acid bacteria has good emulsifying ability, emulsion stabilizing effect and colloid-like protective effect, is low in toxicity, low in skin irritation and high in safety to living bodies due to its origin, can be used as a basic raw material such as an emulsifier or emulsion stabilizer for cosmetics, and has surprisingly found that the fermented rice exhibits remarkable whitening/skin-beautifying effect and hair quality improving effect, and can also be used as a compounding agent for producing a cosmetic effect.

The use of fermented products of cereals is also disclosed in reference 4, and relates to fermented products of cereals and ginseng stems and leaves and their use in skin cleaning products. The method comprises the steps of heating and sterilizing a culture medium containing grains or ginseng stems and leaves, inoculating microorganisms, fermenting and sterilizing to obtain a fermentation product containing thalli, fermentation filtrate and solid particles. The fermentation product is used in a cleaning product. It has good effects in removing skin surface oil and fat, smoothing skin, resisting inflammation, and treating acne. And has the characteristics of nourishing skin, mildly removing skin cutin, low irritation, safety and mildness.

It can be seen that the prior art has already searched for the use of rice ferments derived from natural ingredients as emulsifiers or other active ingredients in place of the prior art synthetic emulsifiers or functional ingredients.

Furthermore, in order to obtain a stable morphology of the oil-in-water composition, for example to enable stable suspension of oily droplets in the system over a longer period of time, it is generally necessary to impart a certain viscosity or consistency to the oil-in-water composition system, and therefore, it is generally necessary to add a certain amount of thickener to obtain a stabilizing effect. Typically, such thickeners are synthetic polymers or chemically modified natural polymers.

Reference 5 discloses an oil-in-water emulsified skin external preparation. The emulsion preparation is obtained by using a lactic acid bacteria fermented substance of hydroxylated phospholipid and grain and alkyl modified acrylic acid-based polymer and/or salt thereof as essential components. Wherein the fermented product of grain is used as emulsifier, alkyl modified acrylic acid-based polymer and/or its salt is used as thickener, and hydroxylated phospholipid is used as stabilizer. Further, reference 5 verifies that the use of the above three components in combination is a necessary condition for obtaining a stable emulsion system (i.e., no phenomenon of water phase separation and oil phase separation occurs), and the desired effect cannot be obtained for any of the components by replacing them with other substances.

It can be seen that there has been some progress in the art in the use of cereal fermentation products as emulsifiers, but due to the nature of their natural substances, there is also a need to further expand their range of use. Meanwhile, there is room for further investigation on the synergistic use of a fermented cereal product and other cosmetic additives.

Reference documents:

reference 1: IFSCC Paris 2014 poster communications,1910-1917

Reference 2: CN103565724A

Reference 3: CN 1256938C

Reference 4: CN106176357A

Reference 5: JP patent No. 5010372

Disclosure of Invention

Problems to be solved by the invention

The present invention relates mainly to the synergistic use of a grain fermentation product with additives in existing skin external agent compositions. In particular, the present invention provides a composition for external skin preparation having a synergistic thickening effect, in which when a fermented product of grain, which is usually used only as an emulsifier, is used together with a thickener of polyacrylic acid or a derivative thereof or a polysaccharide thickener, it has been unexpectedly observed that the simultaneous use of both thickeners can significantly increase the viscosity of the system, produce a synergistic thickening effect, and provide a stable system.

Wherein, the molecular side chain structure of the polyacrylic acid and the derivative thickener contains the following structure (1):

-C(O)-O-L-(R ₁ O) _n -R ₂ .............(1)

wherein R is ₁ Is alkylene with 2-6 carbon atoms, R ₂ Is an alkyl group having 1 to 50 carbon atoms, n represents an integer of 0 to 100, and L is a single bond or a divalent linking group.

Means for solving the problems

The invention solves the technical problems through the following technical means:

[1] the present invention first provides a composition for external use on skin, wherein the composition comprises:

(A) The effective component of grain fermented product obtained by fermenting grain,

(B) A thickening agent, and a water-soluble polymer,

the thickening agent (B) is selected from polyacrylic acid and derivatives thereof or polysaccharide thickening agent,

-C(O)-O-L-(R ₁ O) _n -R ₂ ………(1)

wherein R is ₁ Is a linear or branched alkylene group having 2 to 6 carbon atoms, R ₂ To a carbon atomLinear or branched alkyl groups having a sub-number of 1 to 50, n represents an integer of 0 to 100, and L represents a single bond or a divalent linking group.

[2] The composition according to [1], wherein the cereal is selected from one or more of rice, glutinous rice, millet, black rice, corn and sorghum.

[3] The composition according to [1] or [2], wherein the fermentation is carried out in the presence of lactic acid bacteria.

[4] The composition according to any one of [1] to [3], wherein the composition has a viscosity of 1200 mPa-s or more.

[5]According to [1]]-[4]The composition of any one of the above, wherein in the polyacrylic acid and derivative thickener thereof, R is ₁ Has 2 to 4,R carbon atoms ₂ Has 3 to 50 carbon atoms and 1 to 100 n.

[6] The composition according to any one of [1] to [4], wherein in the polyacrylic acid and the derivative thickener thereof, n is 0, and the composition does not contain a phosphate ester substance.

[7] The composition according to any one of [1] to [6], wherein the polysaccharide thickener is selected from cellulose thickeners.

[8] Further, the present invention also provides a cosmetic, wherein the cosmetic comprises the external skin agent composition according to any one of the above.

ADVANTAGEOUS EFFECTS OF INVENTION

By adopting the technical means, the invention can obtain the following technical effects:

(1) The grain leavening, especially the rice leavening and the thickening agent are used cooperatively, so that the viscosity of the system can be obviously increased compared with the situation that the thickening agent is used independently, and the use scene of the grain leavening is widened;

(2) The presence of a synergistic viscosifying effect enables the use of less thickeners derived from synthetic or chemical modifications in achieving the desired system viscosity and allows the use of more fermentation ingredients derived from natural substances.

(3) By means of the synergistic viscosifying effect, the stabilizing effect of the system can be achieved with a smaller use of other stabilizing additives.

(4) The application of the grain leavening enables the cosmetic containing the skin external agent composition to bring fresh, non-sticky and smooth use feeling to users when in use.

Detailed Description

The following description of the embodiments of the present invention shall be made without specific statement that the units used in the present invention are all international standard units, and the numerical values and numerical ranges presented in the present invention shall be understood to include all the inevitable systematic errors in industrial production.

Effective component of fermented grain product obtained by fermenting grain

In general, it is known in the art that an active ingredient of a fermented product obtained by fermenting grains can be used as an emulsifier or a nutrient. However, the present invention has surprisingly found that the use of such a cereal ferment together with a thickener as defined herein results in a synergistic viscosifying effect with a thickener as defined herein.

The grain in the invention can be one or more selected from rice, glutinous rice, millet, black rice, corn and sorghum. In some preferred embodiments of the present invention, preferably rice or glutinous rice, and further preferably rice.

In addition, the grains in the present invention may be processed grains, for example, any one or more of brown rice, polished rice, processed rice, and the like, without particular limitation, and in some preferred embodiments of the present invention, processed grains such as polished rice or processed rice are generally used in view of facilitating fermentation or purity of the resulting fermentation product.

In the present invention, the method of fermentation is not particularly limited, and the cereal may be fermented with a microorganism, preferably with lactic acid bacteria. Examples of lactic acid bacteria that can be used for fermenting grains include Lactobacillus plantarum (Lactobacillus plantarum), lactobacillus brevis (l.brevis), lactobacillus casei (l.casei), lactobacillus cellobiosus (l.cellobiosus), lactobacillus vaccinia (l.vaccinosus), streptococcus faecalis (Streptococcus faecalis), and Bacillus coagulans (Bacillus coagulans). In some preferred embodiments of the present invention, lactobacillus plantarum (lactobacillus plantarum) is preferably used in view of the emulsifying ability of the resulting lactic acid bacteria-fermented rice, and the like.

In other preferred embodiments of the invention, the cereal is also subjected to a pretreatment prior to fermentation, said pretreatment comprising screening or washing.

For the fermentation process, it can be carried out, for example, as follows:

first, the grains are processed and subjected to a suitable pretreatment such as washing to remove impurity components which may be present or foreign bacteria which may interfere with fermentation of lactic acid bacteria, thereby obtaining grains having a relatively pure component, such as clean polished rice.

Then, the fine-finished rice is placed in a fermentation container, and the fermentation container has sealing performance, so that the subsequent fermentation process can be carried out under anaerobic conditions. Further, water and lactic acid bacteria and fermentation auxiliary components are introduced into the fermentation vessel. The water is preferably distilled water or purified water, and the amount thereof is not particularly limited, and may be generally 10 times or less the mass of the processed and pretreated grains (polished rice) described above. The fermentation auxiliary component can be selected from various saccharides, and glucose, fructose, galactose, sucrose, etc. can be used, among which fructose is most preferably used. The manner of addition of the various substances is not particularly limited, and may be in accordance with a manner generally used in the art.

Then, the vessel is closed so that the fermentation can be carried out under anaerobic conditions, and the temperature and time of the fermentation are not particularly limited and a general fermentation method can be followed. For example, the fermentation may be carried out at room temperature or under heating, and the fermentation time may be several days or several weeks.

The lactic acid bacterium-containing fermented liquid obtained in the fermentation step can be used as it is as an active ingredient. In some preferred embodiments of the present invention, the resulting fermentation liquor may also be subjected to purification or concentration treatment. The means for purification is not particularly limited, and filtration can be performed under normal pressure or under reduced pressure. The concentration can be carried out by a method such as distillation. In a preferred embodiment of the invention, a concentration step may be performed after purification.

< thickening agent (B) >

The use of (B) the thickener in the present invention can impart a certain viscosity to the skin external preparation composition, and in some preferred embodiments, to the aqueous composition.

The thickener (B) is selected from polyacrylic acid and derivatives thereof or polysaccharide thickeners.

The polyacrylic acid and derivative thickener of the present invention may be a polymer obtained by copolymerizing acrylic acid and an acrylic acid ester, or a derivative thereof.

-C(O)-O-L-(R ₁ O) _n -R ₂ ………(1)

wherein R is ₁ Is a linear or branched alkylene group having 2 to 6 carbon atoms, preferably a linear or branched alkylene group having 2 to 4 carbon atoms, R ₂ Is a linear or branched alkyl group having 1 to 50 carbon atoms, preferably a linear or branched alkyl group having 6 to 30 carbon atoms, more preferably a linear or branched alkyl group having 10 to 25 carbon atoms, n represents an integer of 0 to 100, preferably an integer of 1 to 100, more preferably an integer of 6 to 50, more preferably an integer of 10 to 30, and L represents a single bond or a divalent linking group, preferably an alkylene group.

In some embodiments of the present invention, n =0 in the side chain of the polyacrylic acid and its derivative thickener, i.e., no polyoxyalkylene structure is present in the side chain. In this case, the thickener of the present invention can be regarded as obtained by copolymerizing acrylic acid with an alkyl acrylate. For example, in some embodiments, polyacrylic acid and its derivative thickeners may have the following molecular structure:

wherein R and R' may be alkyl groups having 10 to 30 carbon atoms. Thickeners having such a structure are commercially available, for example

TR-1，

TR-2。

In other embodiments of the present invention, n in the side chain of the polyacrylic acid and its derivative thickener is 1 to 30, i.e., a polyoxyalkylene structure is present in the side chain, and it may be exemplified that the polyoxyalkylene may be a polyoxyethylene or polyoxypropylene structure. In some cases, in addition to the side chain having such a polyoxyalkyl structure, in other side chains, there may be a structure of an ester, for example, an ester of acrylic acid with an alcohol having 1 to 6 carbon atoms, typically having the following structure:

wherein R can be H or alkyl with 1-4 carbon atoms. Likewise, thickeners having such a structure are commercially available, for example, as ACULYN under the DOW chemical name ^TM Series thickeners, and the like.

In addition, in addition to the structural cases of the side chains explained above, the polyacrylic acid and derivative thickeners used in some embodiments of the present invention may have amide and sulfonate groups in the side chains. Structures that may be enumerated are:

thickeners having such a structure are commercially available, for example

HMB series thickeners, and the like.

With respect to the above thickener, from the viewpoint of enhancing the thickening effect, the inside of the molecule thereof may have a certain crosslinked structure, such as physical crosslinking by hydrogen bonds or crosslinking by ionic bonds.

The polysaccharide thickener of the present invention may be starch or a cellulose thickener, and preferably a cellulose thickener is used in the present invention. With respect to the polysaccharide thickener of the present invention, in some preferred embodiments, the etherification modification is carried out using alkyl and/or polyalkoxy segments in the molecule. For example, the present invention is optionally a modified cellulose obtained by modifying cellulose by alkylating (etherifying) a hydroxyl group on one unit ring of the fiber. Namely, the modified cellulose has the following structure:

wherein: r may be H, C1-4 alkyl, or- (R) _a O) _m -R _b or-R _c OR _d Wherein R is _a Represents an alkylene group having 1 to 4 carbon atoms, R _b Represents H or an alkyl group having 1 to 4 carbon atoms, R _c Represents an alkylene group having 1 to 4 carbon atoms and optionally substituted by a hydroxyl group, R _d Is alkyl with 10-30 carbon atoms, and m is an integer of 1-100.

As the thickener having the above structure, there may be mentioned one under the name of DAIDO

Products, and the like.

The form of the thickener used is not particularly limited, and for example, it may be used in the form of an aqueous solution or other solution. Preferably, in some embodiments of the present invention, the above-described thickeners may be used in the form of an emulsion, especially an oil-in-water emulsion. Meanwhile, such a solution may contain other auxiliary stabilizing components, for example, an acid, an alkali, a salt, or the like as a stabilizing component.

In terms of the amount of thickener used, the present inventors have discovered that even in the absence of other viscosifying ingredients, when the thickener is used in conjunction with the cereal fermentate, the viscosity increases substantially relative to systems in which the thickener is used or present alone. In the present invention, the amount of the thickener used is an amount capable of achieving a viscosity obtained by the above-mentioned synergistic effect which is 1.2 times or more, preferably 2 times or more, 4 times or more, 4.1 times or more, 4.5 times or more, 6 times or more, or 10 times or more, more preferably 20 times or more, 30 times or more, 50 times or more, or 70 times or more, the viscosity of the system in which the thickener is used or present alone.

It should be noted that the above multiple of the present invention is determined by the following method:

viscosity of a system X containing:

(B) A thickener;

essential stability ingredients;

the balance being water.

The viscosity of a system Y containing:

(B) The content of the thickening agent is the same as that of the system X,

the necessary ingredients for the stability of the composition,

the balance being water.

The above-mentioned essential stabilizing ingredients are preservatives and/or pH regulators.

The above multiple was expressed as β/α.

In the above viscosity test, if a certain content value (mass% based on the total weight of the composition) of the thickener defined in the present invention is considered as a fixed value and the viscosity and the content (mass% based on the total weight of the composition) of the grain fermentation product are considered as two variables, and if the viscosity due to the synergistic thickening effect is 1.2 times or more the viscosity of the thickener used alone in the case of the fixed value of the content of the thickener, the content value of the thickener is within the scope of the present invention.

< composition for external preparation for skin >

The skin external composition of the present invention is a functional composition suitable for use on the surface of human skin. Typically such compositions have a variety of functional ingredients. The conventional skin external preparation composition can be used in the form of liquid, gel, or semisolid. In the present invention, the preferred skin external composition is used in the form of an aqueous composition or an oil-in-water composition.

The composition for external application to the skin of the present invention is formed using the above-mentioned components (a) and (B) as essential components.

In some preferred embodiments of the present invention, the skin external agent composition is an aqueous composition, and can be obtained by dissolving or suspending various ingredients in water as a base. In such a system, the composition may be a homogeneous solution system or an aqueous system containing insoluble matter.

In other preferred embodiments, the composition for external application to the skin is an oil-in-water composition. The "oil-in-water type composition" is an emulsified composition formed by dispersing an oil phase as a dispersed phase in an aqueous phase as a continuous phase by dispersion aid. Wherein the oil phase as the dispersed phase is present in the form of particles. It is noted that the "particles" used in the present invention may, in some embodiments, be present in bead or near-bead form.

The composition of the present invention is composed mainly of water or an aqueous material, preferably deionized water or distilled water. The amount of water to be mixed in the composition is not particularly limited, and is mixed in a sufficient amount to make the whole amount 100%. But is usually 50 to 99% by mass, preferably 60 to 98% by mass, more preferably 70 to 95% by mass, based on the total mass of the composition.

The compositions of the present invention may also contain a dispersed phase, and various oil components may be used. The material can be selected from materials used in general cosmetics within a range that does not impair stability. Preferred oil components include: hydrocarbon oils, silicone oils, ester oils, other liquid fats and oils, and the like.

As the hydrocarbon oil, liquid paraffin, squalane, squalene, paraffin, isoparaffin, ceresin, vaseline, hydrogenated polydecene, and the like can be used.

Examples of the silicone oil include: chain silicones such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane and the like; cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane; silicone resin, silicone rubber, or the like, which is formed with a three-dimensional network structure.

As the liquid fat and oil, there are: palm oil, palm kernel oil, linseed oil, camellia oil, macadamia nut oil, corn oil, mink oil, olive oil, avocado oil, camellia oil, castor oil, safflower oil, jojoba oil, sunflower oil, almond oil, rapeseed oil, sesame oil, soybean oil, peanut oil, diglycerol, tricaprylin, triglycerol, and the like.

As ester oil, there are: cetyl octanoate, hexyl laurate, isopropyl myristate, octyl palmitate, isocetyl stearate, isopropyl isostearate, octyl isopalmitate, isodecyl oleate, cetyl ethylhexanoate, glyceryl tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, 2-ethylhexyl succinate, diethyl sebacate, and the like.

The composition of the present invention is not particularly limited, and the amount of the oil phase component is preferably about 20% by mass or less. Here, the oil phase component refers to a component which is mixed as an oil phase at the time of producing the oil-in-water type composition and dispersed and emulsified in an aqueous phase; specifically, the oil component includes an oil-soluble preservative, an oil-soluble ultraviolet absorber, an oil-soluble drug, an oil-based antioxidant, an oil-based perfume, and the like. If the oil phase component is more than 20% by mass, the oil phase component becomes oily in terms of the feeling of use and also gives stickiness, which is not preferable.

The composition for external application to the skin of the present invention may contain, in addition to the above-mentioned essential components, conventional components used in compositions for external application to the skin such as cosmetics in an amount within a range that does not substantially impair the effects of the present invention. Examples of the general components include: surfactants other than the above, moisturizers, powders, alcohols, water-soluble polymers, oil-soluble polymers, film-forming agents, resins, ultraviolet absorbers, antiseptics, antibacterial agents, perfumes, salts, antioxidants, pH adjusters, chelating agents, algefacients, anti-inflammatory agents, skin beautifying ingredients (whitening agents, cell activators, skin roughness improvers, blood circulation improvers, skin astringents, sebum secretion inhibitors (anti eborrheic), and the like), vitamins, amino acids, nucleic acids, hormones, and inclusion compounds.

From the viewpoint of production and use, the skin external preparation composition obtained by the present invention has a viscosity of 200000 mPas or 150000 mPas or 100000 mPas or 50000 mPas or 10000 mPas (30 ℃) or less and 1200 mPas or 1500 mPas or 2000 mPas or 3000 mPas (30 ℃) or more, so as to maintain a good feeling of use, not to generate a sticky feeling, and to give a refreshing skin feeling to consumers. It is further preferable that the viscosity is 4000 to 9000 mPas (30 ℃ C.). If the viscosity is too low, the effect of the product in use may be impaired, and if the viscosity is too high, the coating may be adversely affected and the feeling of use may be impaired.

< method for producing composition for external use on skin >

The method for producing the composition for external skin preparations of the present invention can be obtained by a conventional mixing method of the composition. In some preferred embodiments of the present invention, the skin external composition of the present invention is manufactured in the form of an aqueous composition or an oil-in-water composition.

The aqueous composition or the oil-in-water composition can be produced by a method for producing a composition that is generally used. For example, in the method for producing the oil-in-water composition, the oil-in-water composition can be produced by mixing the water phase component and the oil phase component at the same temperature, adding the oil phase to the water phase under stirring to disperse and emulsify the components, and then suitably cooling the mixture.

Further, the method for forming the oil-in-water composition of the present invention is not particularly limited, and a stable emulsion can be obtained by providing a necessary mixing shear force by using a mechanical stirring method or by mixing an oil phase component and an aqueous phase component by using an ultrasonic treatment method.

Similarly, the apparatus for producing the composition for external preparation for skin of the present invention is not particularly limited as long as the above requirements can be satisfied.

The skin preparation composition for external use of the present invention may be in the form of a solution, emulsion, etc., and may be in the form of a translucent or opaque form.

Example (b):

while specific embodiments of the present invention will be described below, it should be emphasized that the following specific embodiments are merely illustrative of preferred embodiments of the invention and do not constitute a limitation on all possible embodiments of the invention.

< main raw materials >

Grain fermentation product:

RICE FERMENT-LP (from TECHNOLONG)

Thickening agent:

PEMULEN ^TM (purchased from Luoborun Co.)

ACULYN ^TM (from Dow chemical Co., ltd.)

Aristoflex ^TM (from Claien Co.)

SANGELOSE (purchased from Dasyuchi Kabushiki Kaisha)

Resin (from sunlight chemical Co., ltd.)

< test apparatus and method >

And (3) viscosity testing:

testing by adopting a BROOKFIELD LVDV-II + P or HADV-II + P viscometer;

and (3) testing temperature: at 30 ℃.

Examples 1-1 to 1-6 and comparative examples 1-1 to 1-3：

Compositions were formed according to the following composition and their viscosity was measured, the data being shown in table 1.

Practice ofExamples 2-1 to 2-6 and comparative examples 2-1 to 2-3：

Compositions were formed according to the following composition and their viscosity was measured, the data being shown in table 2.

Examples 3-1 to 3-6 and comparative examples 3-1 to 3-3：

Compositions were formed according to the following composition and their viscosity was measured, the data being shown in table 3.

Examples 4-1 to 4-6 and comparative examples 4-1 to 4-3：

Compositions were formed according to the following composition and their viscosity was measured, the data being shown in table 4.

Examples 5-1 to 5-6 and comparative examples 5-1 to 5-3：

Compositions were formed according to the following composition and their viscosity was measured, the data being shown in table 5.

As seen from the comparison between the above examples and comparative examples, when the fermented cereal material and the thickener are used together in the composition of the present invention, the viscosity is significantly increased compared to the case of using only the thickener, and since it is not generally considered that the use of the fermented cereal material has a significant influence on the viscosity of the composition, it can be confirmed that the use of the fermented cereal material emulsifier has a synergistic effect with the thickener.

Reference example comparative 1：

Compositions were formed according to the following composition and their viscosity was measured, the data being shown in table 6.

Among them, reference examples 1 and 2 used a thickening agent PEMULEN, and used a phospholipid surfactant (purified hydrogenated soybean phospholipid) having a stabilizing effect. And in reference examples 3 and 4 additionally cereal fermentates were added for the following comparison:

comparing example 1-1 with comparative example 1-1, the viscosity of example 1-1 was about 4.06 times the viscosity of comparative example 1-1, and comparing example 1-2 with comparative example 1-2, the viscosity of example 1-2 was about 6.57 times the viscosity of comparative example 1-2.

Reference example 1 was compared with reference example 3, and reference example 3 had a viscosity about 4.03 times that of reference example 1, and reference example 2 was compared with reference example 4, and reference example 4 had a viscosity 3.03 times that of reference example 2.

It can be seen that in the presence of phospholipids, an inhibitory effect is exerted on the synergistic thickening effect of the grain ferment and the thickener indicated in the present invention.

It is assumed that the existence of the phospholipid surfactant affects the grain fermentation product, and thus the synergistic effect of the viscosity increase of the present invention is inhibited. Therefore, in a preferred embodiment of the present invention, especially in the structure represented by the above formula (1), when n =0, a phospholipid surfactant or a phospholipid substance is not present or used in the composition.

Reference example comparative 2：

Compositions were formed according to the following composition and their viscosities were measured, the data are shown in Table 7

Industrial applicability

The composition of the invention can be used as a viscosity-increasing system in aqueous compositions for cosmetics.

Claims

1. A composition for external application to skin, comprising:

(B) A thickening agent, and a water-soluble polymer,

the thickener (B) is selected from polyacrylic acid and derivatives thereof, the polyacrylic acid and derivatives thereof are polymers obtained by copolymerizing acrylic acid and acrylate or derivatives thereof,

wherein, the molecular side chain structure of the polyacrylic acid and the derivative thickener comprises the following structure (1):

-C(O)-O-L-(R ₁ O) _n -R ₂ ………(1)

wherein R is ₁ Is a linear or branched alkylene group having 2 to 6 carbon atoms, R ₂ Is a linear or branched alkyl group having 1 to 50 carbon atoms, n represents an integer of 1 to 100, and L is a single bond or a divalent linking group.

2. The composition as claimed in claim 1, wherein the grains are selected from one or more of rice, glutinous rice, millet, black rice, corn and sorghum.

3. The composition according to claim 1 or 2, characterized in that the fermentation is carried out in the presence of lactic acid bacteria.

4. A composition according to any one of claims 1 to 3, characterized in that the composition has a viscosity of 1200mpa.s or more.

5. Composition according to any one of claims 1 to 4Characterized in that in the polyacrylic acid and derivative thickening agent, R ₁ Has 2 to 4,R carbon atoms ₂ Has 3 to 50 carbon atoms and 1 to 100 n.

6. A cosmetic characterized by comprising the external skin preparation composition according to any one of claims 1 to 5.