WO2013054760A1

WO2013054760A1 - Cosmetic

Info

Publication number: WO2013054760A1
Application number: PCT/JP2012/075966
Authority: WO
Inventors: 瑠奈海上
Original assignee: ライオン株式会社
Priority date: 2011-10-11
Filing date: 2012-10-05
Publication date: 2013-04-18
Also published as: JP6052181B2; JPWO2013054760A1

Abstract

This cosmetic contains: (A) an amphiphilic polymer compound comprising a copolymer containing vinylpyrrolidone as a structural unit; (B) 0.001 to 0.02 mass % of Loquat leaf extract as a pure extract component (B'); and (C) a soybean extract. If the pure extract component of (C) the soybean extract is regarded as (C'), the mass ratio of the content of (A), (B') and (C'), represented by (A)/[(B') + (C')], is 1 to 1000. The cosmetic has a long-acting skin moisture-protecting effect, and a sense of tightness or skin irritation (tingling pain) is almost none existent.

Description

Cosmetics

The present invention relates to a skin moisturizing effect and a cosmetic having the durability thereof.

The stratum corneum in the skin epidermis plays a series of physiological roles including the moisture retention ability of the skin and physical protection of the living body, and plays an important role in life activities. However, it is subtly affected by aging, temperature, humidity, ultraviolet rays, cosmetics, diseases, stress, eating habits, etc., and various troubles such as deterioration of the skin barrier function and skin aging occur. Furthermore, skin troubles are caused by abnormalities in the skin tissue due to factors outside and inside the body, such as changes in the external environment (seasonal changes, ultraviolet rays, etc.) and changes in physiological functions associated with aging and disease, as described above. This occurs due to the keratinization induced by these.

The main attempt to prevent and ameliorate such skin problems is to apply synthetic or natural moisturizing ingredients to prevent skin dryness and increase skin moisturizing ability, and to improve blood circulation by applying blood circulation promoters. Methods have been made. Methods to prevent skin dryness and enhance skin moisturizing ability include moisturizers such as polysaccharides such as free amino acids, organic acids, urea, inorganic ions, hyaluronic acid, animal and plant extracts, vitamins and their derivatives, peptides Attempts have been made to use medicinal skin external preparations and cosmetics containing protein and the like.

A method using soybean extract or loquat leaf extract (Patent Document 1: International Publication No. 2004/016236, Patent Document 2: Japanese Patent Laid-Open No. 2006-051881) has been proposed, but such components are applied to the skin. However, the moisturizing effect and sustainability are not sufficient, the moisturizing effect is temporary, and the moisturizing effect is not obtained continuously. In view of these problems, when the concentration is increased, skin irritation (irritation) becomes stronger, and some people may be inflamed.

As means for improving the sustainability, it is known that a film-forming polymer compound or a hydrophobic polymer compound is blended (Patent Document 3: JP 2007-297392 A, Patent Document 4: International Publication No. 06). / 080389). However, even when the above is used, the effect is insufficient, and there are cases where there is a problem in usability such as a feeling of tension.

International Publication No. 2004/016236 JP 2006-051881 A JP 2007-297392 A International Publication No. 06/080389

The present invention has been made in view of such problems, and an object of the present invention is to provide a cosmetic that has a moisturizing effect on the skin and its durability, and hardly feels a sense of tension or skin irritation. And

As a result of intensive studies to achieve the above object, the present inventor has extracted (A) an amphiphilic polymer compound comprising a copolymer containing vinylpyrrolidone as a structural unit, and (B) loquat leaf extract. 0.001 to 0.02% by mass as pure content (B ′) and (C) soybean extract, and (C) when the extract pure content (C ′) of soybean extract is (A) / [ (B ′) + (C ′)], and the mass ratio of (A), (B ′) and (C ′) is 1 to 1000, so that the moisturizing effect of the skin and scalp and its It has been found that it has persistence and hardly feels a sense of tension or skin irritation (burning feeling), and has led to the present invention.

That is, the present invention provides the following cosmetics.
[1]. (A) Amphiphilic polymer compound comprising a copolymer containing vinylpyrrolidone as a constituent unit, and (B) 0.001 to 0.02 mass by weight of loquat leaf extract as pure extract (B ′) % And (C) soybean extract, and (C) when expressed as pure extract (C ′) of soybean extract, it is represented by (A) / [(B ′) + (C ′)]. Cosmetics having a mass ratio of (A), (B ′) and (C ′) of 1 to 1000.
[2] The component (A) is a copolymer of vinyl pyrrolidone and vinyl acetate (vinyl pyrrolidone / vinyl acetate copolymer), a copolymer of vinyl pyrrolidone and dimethylaminoethyl methacrylate (vinyl pyrrolidone / methacrylic acid) [1] The amphiphilic polymer compound selected from a dimethylaminoethyl copolymer) and a copolymer of vinylpyrrolidone and aminopropylmethacrylamide acrylate (vinylpyrrolidone / dimethylaminopropylmethacrylamide copolymer) Cosmetics.
[3] The cosmetic according to [1] or [2], wherein the content of the component (A) is 0.001 to 5% by mass with respect to the total amount of the cosmetic.
[4]. [1], [2] or [3], wherein the content of component (C) as pure extract (C ′) is 0.00002 to 0.02 mass% with respect to the total amount of the cosmetic. Cosmetics described.
[5] The cosmetic according to any one of [1] to [4], further comprising (D) menthol.
[6] The cosmetic according to any one of [1] to [5], which is a scalp cosmetic.

According to the present invention, it is possible to provide a cosmetic that has a skin moisturizing effect and its durability, and that hardly feels a sense of tension or skin irritation.

Hereinafter, the present invention will be described in detail.
The cosmetic of the present invention comprises (A) an amphiphilic polymer compound comprising a copolymer containing vinylpyrrolidone as a constituent unit, and (B) loquat leaf extract as a pure extract (B ′). 0.02% by mass and (C) soybean extract, and (C) expressed as (A) / [(B ′) + (C ′)] when pure extract (C ′) of soybean extract is used. The mass ratio of (A), (B ′) and (C ′) is 1 to 1000.

(A) Amphiphilic polymer compound comprising a copolymer containing vinylpyrrolidone as a constitutional unit The amphiphilic polymer compound of the present invention comprises a constitutional unit comprising a hydrophilic monomer and a hydrophobic monomer in the molecule. As long as it can be used for the human body, any of synthetic, semi-synthetic and natural compounds can be used. The structural unit composed of a hydrophilic monomer and the structural unit composed of a hydrophobic monomer can be used singly or in appropriate combination of two or more.

Examples of hydrophilic monomers include N-vinylpyrrolidone, vinylcaprolactam, crotonic acid, polyoxyethylene, acrylamide, methacrylamide, N-methylacrylamide, polyoxyethylene (meth) acrylate, polyoxyethylene methyl (meth) acrylate, polyoxy Ethylene ethyl (meth) acrylate, polyoxyethylene propyl (meth) acrylate, polyoxyethylene butyl (meth) acrylate, acrylic acid having an acidic group, methacrylic acid and salts thereof, vinyl sulfonic acid, styrene sulfonic acid, and the like, and N, N-dimethylaminoethyl methacrylate having a basic group, N, N-diethylaminoethyl methacrylate, N, N-dimethylaminopropyl acrylamide and salts thereof may be mentioned. .

Hydrophobic monomers include vinyl acetate, polyoxypropylene (meth) acrylate, polyoxypropylene alkyl (meth) acrylate, polyoxypropylene polyoxyethylene (meth) acrylate, polyoxypropylene polyoxyethylene alkyl (meth) acrylate, poly Oxytetramethylene (meth) acrylate, polyoxytetramethylene alkyl (meth) acrylate, polyoxytetramethylene polyoxyethylene (meth) acrylate, polyoxytetramethylene polyoxyethylene alkyl (meth) acrylate, dimethylaminoethyl methacrylate, acrylic Aminopropyl methacrylamide, aminopropyl methacrylamide methacrylate, acrylic ester, methacrylic ester, styrene, Chill acrylate, methyl methacrylate, butyl methacrylate, acrylate derivatives and methacrylate derivatives such as glycidyl methacrylate, N-n-butyl methacrylate N--substituted alkyl methacrylamide derivatives such as acrylamide, vinyl chloride, acrylonitrile.

Among these, from the viewpoint of the long-lasting moisturizing effect on the skin, a copolymer of vinyl pyrrolidone and vinyl acetate (vinyl pyrrolidone / vinyl acetate copolymer), a copolymer of vinyl pyrrolidone and dimethylaminoethyl methacrylate. One or more of a copolymer (a copolymer of vinylpyrrolidone / dimethylaminoethyl methacrylate) and a copolymer of vinylpyrrolidone and aminopropylmethacrylate acrylate (vinylpyrrolidone / aminopropylmethacrylate acrylate copolymer) A vinylpyrrolidone / vinyl acetate copolymer is more preferable.

The molar ratio of these copolymer monomers is not particularly limited, but is preferably 1/99 to 99/1, more preferably 20/80 to 80/20, and even more preferably 30/70 to 70/30. .

As the vinyl pyrrolidone / vinyl acetate copolymer, a commercially available product can be used, and is not particularly limited, and can be appropriately selected according to the purpose. For example, “PVP / VA S-630” (molar ratio of copolymer monomers: vinyl pyrrolidone / vinyl acetate = 60/40, molecular weight: 51,000, glass transition temperature: 110 ° C.), “rubiscol VA73W” ( The molar ratio of the monomer of the copolymer: vinylpyrrolidone / vinyl acetate = 70/30), “Lubicol VA64W” (the molar ratio of the monomer of the copolymer: vinylpyrrolidone / vinyl acetate = 60/40), and the like.

The content of the component (A) is preferably 0.001 to 5% by mass, and more preferably 0.01 to 1% by mass with respect to the total amount of the cosmetic. By setting it as 0.001 mass% or more, the sustainability of the skin moisturizing effect can be obtained more, and by setting it as 5 mass% or less, it is possible to further suppress the feeling of tension.

(B) Loquat leaf extract The loquat leaf extract is an extract obtained by extracting water, ethanol, propylene glycol, 1,3-butylene glycol or a mixture thereof from the leaves of loquat Eriobotrya japonica Lindley (Rosaceae). In the present invention, “biwa leaf extract” refers to an extract containing the extract itself and a solvent such as an extraction solvent.

As the loquat leaf extract, a commercially available product can be used. For example, loquat extract-J (lowa leaf extract 1.4% by mass (extracted extract), water 49.3% by mass, ethanol 49.3% by mass), Loquat leaf extract CA (liwa leaf extract 1% by mass (extracted extract), 1,3-butylene glycol 99% by mass), loquat extract BG-J (liwa leaf extract 1.5% by mass (extracted extract), water 49.25% by mass, 1,3-butylene glycol 49.25% by mass), loquat extract LA (0.96% by mass of loquat leaf extract (pure extract)), 69.33% by mass of water, 29.71% by mass of ethanol %) (Both manufactured by Maruzen Pharmaceutical Co., Ltd.), Falco Rex Biwa Leaf B (1.5% by weight Biwa leaf extract (pure extract), 49.25% by weight water, 49.25% by weight ethanol), Falco Rex Biwa Leaf E ( Wa leaf extract 1.58 wt% (extract pure content), water 66.65%, ethanol 31.77 mass%) (both include Ichimaru Pharcos Co., Ltd.).

The content of the component (B) loquat leaf extract is 0.001 to 0.02% by mass, and 0.004 to 0.01% by mass as a pure extract (B ′) with respect to the total amount of the cosmetic. preferable. When the content of the component (B ′) is less than 0.001% by mass, the skin moisturizing effect and its durability are weakened, and when it exceeds 0.02% by mass, the skin irritation (burning feeling) becomes strong. Sometimes.

(C) Soybean extract The soybean extract is an extract obtained by extracting soybean ground with a solvent such as fats and oils, squalane, petroleum ether, hexane, benzene, acetone, lower alcohol, polyhydric alcohol, water, steam distilled extract, compressed extract, A liquefied gas extraction extract etc. are mentioned. In the present invention, the term “soybean extract” means an extract containing the extract itself and a solvent such as an extraction solvent.

As the soybean extract, a commercially available product can be used as long as the effects of the present invention are not impaired. For example, flavosterone SB (soybean extract or soybean seed extract 0.4% by mass (extract extract), 1,3-butylene glycol 30% by mass) , Water 69.6% by mass), flavosterone SE (soybean extract or soybean seed extract 0.43% by mass (extracted pure), water 57.17% by mass, absolute ethanol 42.4% by mass) (all Maruzen Pharmaceutical Co., Ltd.) Manufactured) and the like.

The content of the component (C) as a pure extract (C ′) is preferably 0.000004 to 0.02%, more preferably 0.00002 to 0.02% by mass relative to the total amount of the cosmetic. By setting it as this range, the moisturizing effect of the skin and its durability can be obtained more.

(A) / [(B ′) + (C ′)], where (A) / [(B ′) + (C ′)] (where (B ′) is (B) loquat leaf extract The pure mass of extract, (C ′) is represented by (C) represents the pure content of soybean extract), and the mass ratio of (A), (B ′) and (C ′) is 1-1000, 1 to 124 are preferable, 1 to 100 are more preferable, and 4 to 25 are more preferable. By setting it as this range, the persistence of the moisturizing effect of the skin can be improved, and the feeling of firmness of the skin can be suppressed. If the content ratio is less than 1, the skin moisturizing effect will be low, and if it exceeds 1000, the skin moisturizing effect will be insufficient and the skin will feel tight.

(D) Menthol It is preferable to mix menthol in the cosmetic of the present invention. By blending menthol, it has the above-mentioned effects and can provide an effective feeling such as “cool feeling” and “feel that the nutrient component penetrates into the background”. The menthol is not particularly limited and may be a synthetic product or a natural product, may be 1-menthol or dl-menthol, and may be used alone or in appropriate combination of two or more. Of these, l-menthol is preferable. As menthol, commercially available products can be used. Specifically, l-menthol (Takasago International Corporation), l-menthol (Toyo Hakkan Kogyo Co., Ltd.), l-menthol (Ogi Pharmaceutical Co., Ltd.), l- Mentor (Nagaoka Business Co., Ltd.)

The content of the component (D) is preferably 0.1 to 1.5% by mass, more preferably 0.4 to 1% by mass with respect to the total amount of the cosmetic. By making it within this range, it is possible to give more effective feelings such as “cool feeling” and “feeling that nutrients penetrate into the background”, and by setting it to 1.5% by mass or less, skin irritation (burning feeling) ) Is unlikely to occur.

<Optional component>
The cosmetics of the present invention can be blended with optional components blended in the cosmetics as long as the effects of the present invention are not impaired. As an arbitrary component, it can select suitably from what is normally used for cosmetics, 1 type can be individual, or 2 or more types can be mix | blended in a suitable quantity. For example, anionic surfactant such as polyoxyethylene alkyl ether sulfate, nonionic surfactant such as amine oxide and polyoxyethylene alkyl ether, cationic surfactant, amphoteric surfactant, oil, silicone, lower or higher alcohol Alcohol (content is 0.1 to 99% by mass with respect to the total amount of the cosmetic), lanolin derivative, protein derivative, acrylic resin dispersion, cationic polymer, anionic polymer, nonionic properties excluding the component (A) Drugs such as polymers, vitamins, fresheners, preservatives, pH adjusters, antioxidants, sequestering agents, UV absorbers, animal and plant extracts or their derivatives, 6-benzylaminopurine, nicotinamide, piroctone olamine , Β-glycyrrhetinic acid, t-flavanone, adenosine, paulownia leaf extract, assembly, Hair growth active ingredients such as xylidyl, carpronium chloride, pentadecanoic acid glycerides, pigments, fragrances, pigments, inorganic powders, clay minerals, water-insoluble polymer powders such as nylon, polyethylene, propylene glycol, glycerin, 1,3-butylene glycol, Polyhydric alcohols such as polyethylene glycol and sorbitol (content is 0.1 to 50% by mass, more preferably 1 to 30% by mass with respect to the total amount of cosmetics), ethanol (content is 0 to 80% by mass, and in the case of scalp cosmetics, 50 to 80% by mass with respect to the total amount of cosmetics) and water (content is 0.1 to 99% by mass with respect to the total amount of cosmetics).

The pH of the cosmetic of the present invention is not particularly limited and can be appropriately selected depending on the purpose, but the pH at 25 ° C. is preferably 4.0 to 8.0, more preferably 5.0 to 7.0. . By setting it as this range, the retention property of the cosmetic on the skin and scalp is good, and it does not irritate the scalp and skin. The pH can be measured using a pH meter (HM-30G, manufactured by Toa DKK Co., Ltd.). The pH of the cosmetic can be adjusted using, for example, a desired pH adjuster. The pH adjuster is not particularly limited and may be appropriately selected depending on the intended purpose. For example, citric acid, succinic acid, 2-amino-2-methyl-1-propanol, monoethanolamine and the like are preferable. It is.

The cosmetics of the present invention can be applied to skin cosmetics, hair cosmetics, scalp cosmetics, and can be widely applied to hair cleaning agents, hair cosmetics, skin cleaning agents, skin cosmetics, and the like. A dosage form is not specifically limited, According to the objective, it can select suitably. For example, liquid, gel, lotion, mist, cream, aerosol foam, non-aerosol foam, aerosol spray, non-aerosol spray and the like can be mentioned. Based on the dosage form, it can be prepared based on a conventional method. The container is also appropriately selected depending on the dosage form.

Skin cosmetics include various cosmetic creams, emulsions, cosmetic liquids, beauty liquids, packs, pre-make-up, under-make-up, foundations, gels, ointments, and other external skin compositions, bath cosmetics, body soaps, body rinses Etc. can be used suitably. Hair cosmetics such as shampoo, rinse, treatment, hair cream, hair gel, hair spray, hair foam, hair water, hair wax, etc. , Hair growth tonic, hair growth cream, hair growth foam and other hair growth agents, hair nourishing agents, scalp essences, hair growth agents, etc. can be widely used as scalp cosmetics. An effect is obtained. Of these, scalp cosmetics are preferred, and hair restorers, hair nourishing agents, and scalp essences are preferred.

Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example. In the following examples, unless otherwise specified, “%” in the composition represents mass%, and the ratio represents mass ratio.

[Examples 1 to 20, Comparative Examples 1 to 7]
Based on the composition (mass%) shown in Tables 1 to 5, the components (A), (B), (C) and common components are sequentially added and dissolved in ethanol, and stirred at room temperature to 40 ° C. A hair restorer was prepared by stirring with In addition, the upper stage of the (B) and (C) component in a table | surface shows the quantity of a stock solution, and the lower stage shows the compounding quantity of a pure extract.
Each of the obtained hair growth agents was measured for pH after 1 minute at 25 ° C. using a pH meter (manufactured by Toa DKK Co., Ltd., HM-30G). Met.
About each obtained hair restorer, the following method evaluated the moisturizing effect, the persistence of the moisturizing effect, the absence of a feeling of tension, and the absence of skin irritation (no irritation).

Sensory evaluation <Moisturizing effect>, <No tension>, <No tingling>
Immediately after 20 female panelists applied each hair growth agent to 1.5 mL of the scalp, the evaluation items of “moisturizing effect”, “no feeling of tension”, and “no feeling of tingling” were evaluated. The following evaluation criteria are shown according to the number of respondents who answered good.
[Evaluation criteria]
A: Out of 20, 16 or more were judged to be good.
○ to ◎: Out of 20 people, 13 to 15 people were judged good.
○: Among 20 people, 11 to 12 people judged good.
Δ: Out of 20, 6-10 were judged to be good.
×: Among 20 people, 5 or less were judged to be good.

Sensory evaluation <sustainability of moisturizing effect>
Twenty female panels applied 1.5 ml of each hair growth agent to the scalp and evaluated the “moisturizing effect” 6 hours later. The following evaluation criteria are shown according to the number of respondents who answered good.
[Evaluation criteria]
A: Out of 20, 16 or more were judged to be good.
○ to ◎: Out of 20 people, 13 to 15 people were judged good.
○: Among 20 people, 11 to 12 people judged good.
Δ: Out of 20, 6-10 were judged to be good.
×: Among 20 people, 5 or less were judged to be good.

[Examples 21 to 24]
Based on the composition (% by mass) shown in Table 6, (A) component, (B) component, (C) component, (D) component and common component were sequentially added and dissolved in ethanol, and room temperature to 40 ° C. A hair restorer was prepared by stirring with a stirrer. The pH of each obtained hair restorer was measured by the same method as described above, and all were 5.3.
For each hair restorer obtained above, the moisturizing effect, persistence of the moisturizing effect, no feeling of tension, no skin irritation (no tingling sensation), the following method, refreshing feeling, nutritional components penetrated into the skin Evaluated the feeling to do.

Sensory evaluation <cool feeling>, <feeling that nutrients penetrate into the background>
Evaluation was performed on the evaluation items of “cool feeling” and “feeling of nutrients penetrating into the skin” immediately after 20 female panelists applied each hair growth agent to 1.5 mL of the scalp. The following evaluation criteria are shown according to the number of people who answered “I actually felt”.
[Evaluation criteria]
A: It was judged that 16 or more out of 20 people “realized”.
○ to ◎: Out of 20 people, 13 to 15 people were judged to have “realized”.
○: Among 20 people, 11 to 12 people judged that “I felt it”.
Δ: Among 20 people, 6 to 10 people were judged to have “realized”.
×: Among 20 people, 5 or less people judged that “realized”.

[Examples 25 to 29]
Further, the present invention can also be applied to the following hair cleansing shampoos, skin cleansing body soaps, cosmetics for skin cosmetics, hair growth sprays for scalp cosmetics, and scalp essences. In addition, the hair growth effect of the said Example was confirmed by the actual use experiment.

[Example 25: Shampoo]
A shampoo having the composition shown in Table 7 was prepared by a conventional method, and the following evaluation was performed.
Sensory evaluation <Moisturizing effect>, <No tension>, <No tingling>
Twenty female panels used 6 mL of shampoo composition, and evaluated the evaluation items of “moisturizing effect”, “no tension”, and “no tingling” of the scalp after drying. Based on the number of respondents who answered “good”, it was shown in the following evaluation.
A: Out of 20, 16 or more were judged to be good.
○ to ◎: Out of 20 people, 13 to 15 people were judged good.
○: Among 20 people, 11 to 12 people judged good.
Δ: Out of 20, 6-10 were judged to be good.
×: Among 20 people, 5 or less were judged to be good.

Sensory evaluation <sustainability of moisturizing effect>
Twenty female panels used 6 mL of the shampoo composition and evaluated the “moisturizing effect” of the scalp after 6 hours of drying. Based on the number of respondents who answered “good”, it was shown in the following evaluation.
[Evaluation criteria]
A: Out of 20, 16 or more were judged to be good.
○ to ◎: Out of 20 people, 13 to 15 people were judged good.
○: Among 20 people, 11 to 12 people judged good.
Δ: Out of 20, 6-10 were judged to be good.
×: Among 20 people, 5 or less were judged to be good.

[Example 26: Body soap]
A body soap having the composition shown in Table 8 was prepared by a conventional method, and the following evaluation was performed.
Sensory evaluation <Moisturizing effect>, <No tension>, <No tingling>
Twenty female panels used 10 mL of the body soap composition, and evaluated the evaluation items of “moisturizing effect”, “no tension” and “no tingling” on the skin after drying. The results are shown in the following evaluation criteria according to the number of people who answered that the results were good.
[Evaluation criteria]
A: Out of 20, 16 or more were judged to be good.
○ to ◎: Out of 20 people, 13 to 15 people were judged good.
○: Among 20 people, 11 to 12 people judged good.
Δ: Out of 20, 6-10 were judged to be good.
×: Among 20 people, 5 or less were judged to be good.

Sensory evaluation <sustainability of moisturizing effect>
Twenty female panels used 10 mL of the body soap composition and evaluated the “moisturizing effect” of the skin after drying. The following evaluation criteria are shown according to the number of respondents who answered good.
[Evaluation criteria]
A: Out of 20, 16 or more were judged to be good.
○ to ◎: Out of 20 people, 13 to 15 people were judged good.
○: Among 20 people, 11 to 12 people judged good.
Δ: Out of 20, 6-10 were judged to be good.
×: Among 20 people, 5 or less were judged to be good.

[Example 27: Cosmetic liquid]
A cosmetic liquid having the composition shown in Table 9 was prepared by a conventional method, and the following evaluation was performed.
Sensory evaluation <Moisturizing effect>, <No tension>, <No tingling>
After 20 female panelists washed their face with facial cleanser and applied 0.6g of cosmetic liquid on their left and right cheeks, the evaluation items of "Moisturizing effect", "No feeling of tension", and "No feeling of tingling" Evaluation was performed. Based on the number of respondents who answered “good”, it was shown in the following evaluation.
[Evaluation criteria]
A: Out of 20, 16 or more were judged to be good.
○ to ◎: Out of 20 people, 13 to 15 people were judged good.
○: Among 20 people, 11 to 12 people judged good.
Δ: Out of 20, 6-10 were judged to be good.
×: Among 20 people, 5 or less were judged to be good.

Sensory evaluation <sustainability of moisturizing effect>
After 20 female panels washed their face with a facial cleanser, 0.6 g of cosmetic liquid was applied to the left and right cheeks, and the “moisturizing effect” 6 hours later was evaluated. The following evaluation criteria are shown according to the number of respondents who answered good.
[Evaluation criteria]
A: Out of 20, 16 or more were judged to be good.
○ to ◎: Out of 20 people, 13 to 15 people were judged good.
○: Among 20 people, 11 to 12 people judged good.
Δ: Out of 20, 6-10 were judged to be good.
×: Among 20 people, 5 or less were judged to be good.

[Example 28: Hair growth spray]
A hair growth spray having the composition shown in Table 10 was prepared by a conventional method, and the following evaluation was performed.

Sensory evaluation <Moisturizing effect>, <No tension>, <No tingling>
Immediately after 20 female panelists applied 3 g of hair-growth spray to the scalp, the evaluation items of “moisturizing effect”, “no feeling of tension” and “no feeling of tingling” were evaluated. Based on the number of respondents who answered “good”, it was shown in the following evaluation.
[Evaluation criteria]
A: Out of 20, 16 or more were judged to be good.
○ to ◎: Out of 20 people, 13 to 15 people were judged good.
○: Among 20 people, 11 to 12 people judged good.
Δ: Out of 20, 6-10 were judged to be good.
×: Among 20 people, 5 or less were judged to be good.

Sensory evaluation <sustainability of moisturizing effect>
Twenty female panels applied 3 g of hair-growth spray to the scalp and evaluated the “moisturizing effect” after 6 hours. The following evaluation criteria are shown according to the number of respondents who answered good.
[Evaluation criteria]
A: Out of 20, 16 or more were judged to be good.
○ to ◎: Out of 20 people, 13 to 15 people were judged good.
○: Among 20 people, 11 to 12 people judged good.
Δ: Out of 20, 6-10 were judged to be good.
×: Among 20 people, 5 or less were judged to be good.

Sensory evaluation <coolness>, <feeling of nutrients penetrating into the background>
Immediately after 20 female panelists applied 3 g of hair-growth spray to the scalp, the evaluation items of “cool feeling” and “feeling of nutrients penetrating into the skin” were evaluated. Based on the number of respondents who answered “I actually felt”, the following evaluation criteria were used.
[Evaluation criteria]
A: It was judged that 16 or more out of 20 people “realized”.
○ to ◎: Out of 20 people, 13 to 15 people were judged to have “realized”.
○: Among 20 people, 11 to 12 people judged that “I felt it”.
Δ: Among 20 people, 6 to 10 people were judged to have “realized”.
×: Among 20 people, 5 or less people judged that “realized”.

[Example 29: Scalp essence]
A scalp essence having the composition shown in Table 12 was prepared by a conventional method, and the following evaluation was performed.
Sensory evaluation <Moisturizing effect>, <No tension>, <No tingling>
After 20 female panels were shampooed and towel-dried, 1.5 ml scalp essence was applied to the entire scalp, and the evaluation items for “moisturizing effect”, “no stuffiness”, and “no tingling” were evaluated. Went. The following evaluation criteria are shown according to the number of respondents who answered good.
[Evaluation criteria]
A: Out of 20, 16 or more were judged to be good.
○ to ◎: Out of 20 people, 13 to 15 people were judged good.
○: Among 20 people, 11 to 12 people judged good.
Δ: Out of 20, 6-10 were judged to be good.
×: Among 20 people, 5 or less were judged to be good.

Sensory evaluation <sustainability of moisturizing effect>
After 20 female panels washed their hair and towel-dried, 1.5 mL of scalp essence was applied to the entire scalp, and the “moisturizing effect” 6 hours later was evaluated. The following evaluation criteria are shown according to the number of respondents who answered good.
[Evaluation criteria]
A: Out of 20, 16 or more were judged to be good.
○ to ◎: Out of 20 people, 13 to 15 people were judged good.
○: Among 20 people, 11 to 12 people judged good.
Δ: Out of 20, 6-10 were judged to be good.
×: Among 20 people, 5 or less were judged to be good.

Sensory evaluation <coolness>, <feeling of nutrients penetrating into the background>
After 20 female panels were shampooed and towel-dried, the evaluation items for “cool feeling” and “feeling that nutrients penetrated into the ground” immediately after applying 1.5 mL of scalp essence to the entire scalp were evaluated. . The following evaluation criteria are shown according to the number of people who answered “I actually felt”.
[Evaluation criteria]
A: It was judged that 16 or more out of 20 people “realized”.
○ to ◎: Out of 20 people, 13 to 15 people were judged to have “realized”.
○: Among 20 people, 11 to 12 people judged that “I felt it”.
Δ: Among 20 people, 6 to 10 people were judged to have “realized”.
×: Among 20 people, 5 or less people judged that “realized”.

The raw materials used in preparing the examples and comparative examples are shown below.
Loquat leaf extract CA (loquat leaf extract 1% (extract pure), 1,3-butylene glycol 99%)
Flavosterone SE (soybean extract or soybean seed extract 0.43% (pure extract), water 57.17%, absolute ethanol 42.4%)
Polyethylene glycol 300 (quasi-drug raw material standard)

Claims

(A) an amphiphilic polymer compound comprising a copolymer containing vinylpyrrolidone as a structural unit, and (B) 0.001 to 0.02% by mass of Biwa leaf extract as a pure extract (B ′); (A) / [(B ′) + (C ′)], which is expressed as (A) / (C ′) when the extract contains (C) soybean extract. , (B ′) and (C ′) are cosmetics having a mass ratio of 1 to 1000.
(A) Component is a copolymer of vinyl pyrrolidone and vinyl acetate (vinyl pyrrolidone / vinyl acetate copolymer), a copolymer of vinyl pyrrolidone and dimethylaminoethyl methacrylate (vinyl pyrrolidone / dimethylaminoethyl methacrylate copolymer) The cosmetic according to claim 1, which is an amphiphilic polymer compound selected from a polymer) and a copolymer of vinylpyrrolidone and aminopropylmethacrylamide acrylate (vinylpyrrolidone / dimethylaminopropylmethacrylamide copolymer).
The cosmetic according to claim 1 or 2, wherein the content of the component (A) is 0.001 to 5 mass% with respect to the total amount of the cosmetic.
The cosmetic according to claim 1, 2 or 3, wherein the content of the component (C) as an extract pure component (C ') is 0.00002 to 0.02 mass% with respect to the total amount of the cosmetic.
The cosmetic according to any one of claims 1 to 4, further comprising (D) menthol.
The cosmetic according to any one of claims 1 to 5, which is a scalp cosmetic.