CN111757726A - Aqueous cosmetic - Google Patents

Aqueous cosmetic Download PDF

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Publication number
CN111757726A
CN111757726A CN201980015363.3A CN201980015363A CN111757726A CN 111757726 A CN111757726 A CN 111757726A CN 201980015363 A CN201980015363 A CN 201980015363A CN 111757726 A CN111757726 A CN 111757726A
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powder
cosmetic
poe
aqueous cosmetic
present
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王冕
铃木一明
高桥繁郎
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Shiseido Co Ltd
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Shiseido Co Ltd
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A61K8/25Silicon; Compounds thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A61K8/29Titanium; Compounds thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/73Polysaccharides
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/84Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
    • A61K8/86Polyethers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00Preparations for care of the skin

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Birds (AREA)
  • Epidemiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Dermatology (AREA)
  • Cosmetics (AREA)

Abstract

The purpose of the present invention is to provide an aqueous cosmetic composition containing polyvinyl alcohol, which, despite the fact that a large amount of powder components are contained in the aqueous cosmetic composition, can suppress sedimentation and aggregation of the powder and has excellent dispersion stability of the powder. The aqueous cosmetic of the present invention is characterized by containing: a) polyvinyl alcohol, b) powder, c) at least two polysaccharide thickeners, d) vinyl water-soluble thickeners, and e) hydrophilic nonionic surfactants.

Description

Aqueous cosmetic
Technical Field
The present invention relates to an aqueous cosmetic. More specifically, the present invention relates to an aqueous cosmetic composition containing polyvinyl alcohol, which is capable of suppressing sedimentation and aggregation of powder and has excellent dispersion stability, despite the fact that a large amount of powder components are contained in the aqueous cosmetic composition.
Background
In recent years, in addition to functions required for general cosmetics such as adjusting the state of skin and beautifying skin, novelty and peculiar characteristics of appearance when applied to skin have become important factors of sales value. For example, application cosmetics printed with animal patterns and the like on face mask cotton are sold, and it is true that people are encouraged to purchase these goods due to a reverberation on SNS (Social networking Services).
In addition to the use of pattern-printed cotton for face masks, a cosmetic that can be used by coloring the cosmetic itself with a colorant and applying the colored cosmetic to a desired area has been considered as a product that satisfies the consumer's preference as described above. In order to realize such a cosmetic, it is necessary to blend a large amount of a coloring agent to color into a novel color which has not been achieved before. In addition, it is preferable to use a pigment as the colorant from the viewpoint of safety to the environment and human body, but there is a problem that if a large amount of pigment is blended in the cosmetic, sedimentation and aggregation occur with time.
Conventionally, in order to suppress the sedimentation of pigments blended in cosmetics, it has been proposed to blend a clay mineral in combination with a specific thickener (patent documents 1 and 2).
On the other hand, polyvinyl alcohol is used as a component for a large amount of base cosmetics, makeup cosmetics, and the like for the purpose of imparting a firm feeling to the skin, forming a coating film, and the like. Among these, a pull-off type dressing cosmetic having both effects of removing dirt adhering to the skin and cleaning the old horny layer is preferably a cosmetic containing polyvinyl alcohol as a main component from the viewpoints of rapid drying and easy peeling after drying.
However, as also described in patent document 3, the cosmetic blended with polyvinyl alcohol has the following problems: the acetic acid residue contained in polyvinyl alcohol is hydrolyzed over time, which causes a change in the pH of the cosmetic, aggregation and sedimentation of the blended powder, and deteriorates the stability of the composition over time. Therefore, further improvement is required for stably blending a large amount of powder in a cosmetic containing polyvinyl alcohol.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2013-supplement 40106
Patent document 2: japanese patent laid-open No. Hei 9-175924
Patent document 3: japanese patent laid-open No. 2006-131616
Disclosure of Invention
Problems to be solved by the invention
The present invention relates to a cosmetic composition which can be blended with a large amount of powder in an aqueous cosmetic composition blended with polyvinyl alcohol. The purpose of the present invention is to provide an aqueous cosmetic composition which, despite the incorporation of a large amount of powder, can suppress sedimentation and aggregation of the powder over time and has excellent dispersion stability.
Means for solving the problems
The present inventors have made extensive studies to solve the above problems, and as a result, have found that: the present inventors have found that by combining at least two kinds of polysaccharide thickeners, a vinyl water-soluble thickener, and a hydrophilic nonionic surfactant in an aqueous cosmetic composition containing polyvinyl alcohol and a powder, sedimentation and aggregation of the powder over time can be sufficiently suppressed, and the dispersion stability of the powder is excellent, and thus the present invention has been completed.
That is, the present invention provides an aqueous cosmetic composition comprising:
(a) polyvinyl alcohol,
(b) Powder, a,
(c) At least two polysaccharide thickeners,
(d) A vinyl water-soluble thickener,
(e) A hydrophilic nonionic surfactant.
ADVANTAGEOUS EFFECTS OF INVENTION
The present invention, by employing the above-described configuration, can provide an aqueous cosmetic composition which sufficiently suppresses sedimentation and aggregation of powder over time and has excellent dispersion stability of powder. In addition, since a large amount of pigment and pearlescent agent can be blended, the cosmetic composition has an unprecedented appearance when applied to the skin, and can satisfy consumer preference.
Detailed Description
The aqueous cosmetic of the present invention is characterized by comprising: (a) polyvinyl alcohol, (b) powder, (c) at least two polysaccharide thickeners, (d) vinyl water-soluble thickeners, and (e) hydrophilic nonionic surfactants. Hereinafter, each component constituting the cosmetic of the present invention will be described in detail.
< (a) polyvinyl alcohol
The polyvinyl alcohol (a) (hereinafter, may be simply referred to as "component (a)") to be blended in the aqueous cosmetic composition of the present invention is not particularly limited as long as it is a polyvinyl alcohol generally used in cosmetic compositions.
The polymerization degree of polyvinyl alcohol is generally expressed as the viscosity of a 4 mass% concentration aqueous solution at 20 ℃, and the saponification degree is expressed by the saponification ratio of acetyl groups of polyvinyl acetate when polyvinyl alcohol is produced. As polyvinyl alcohol, various types are commercially available depending on the degree of saponification and the viscosity, and examples thereof include: gohsenol EG-05C (degree of saponification 86.5 to 89.0 mol%, viscosity 4.2 to 6.3 mPas), Gohsenol EG-40C (degree of saponification 86.5 to 89.0 mol%, viscosity 34.4 to 51.6 mPas) (all manufactured by Nippon synthetic chemical Co., Ltd.), P.V.A EG-40 (degree of saponification 86.5 to 89.0 mol%, viscosity 40.0 to 46.0 mPas, FUJI AMIDE CHEMICAL CO., LTD., manufactured by Nippon synthetic chemical Co., Ltd.), and the like.
As the component (a) to be blended in the aqueous cosmetic composition of the present invention, polyvinyl alcohol having any viscosity may be used alone, or two or more kinds of polyvinyl alcohol having different viscosities may be mixed and used. When a plurality of kinds of polyvinyl alcohols having different viscosities are mixed and used, when a high-viscosity one and a low-viscosity one are used in combination, sedimentation and aggregation of the powder tend to be further suppressed. Here, the blending ratio of the polyvinyl alcohol having a high viscosity to the polyvinyl alcohol having a low viscosity (high viscosity polyvinyl alcohol/low viscosity polyvinyl alcohol) is preferably more than 1, and more preferably 1.5 to 12.
In the cosmetic of the present invention, a 4 mass% aqueous solution having a viscosity of 1 mPas or more and less than 30 mPas at 20 ℃ is used as a low-viscosity polyvinyl alcohol, and a 4 mass% aqueous solution having a viscosity of 30 mPas or more and 70 mPas or less is used as a high-viscosity polyvinyl alcohol.
The amount of component (a) in the aqueous cosmetic composition of the present invention is 1 to 40% by mass, preferably 3 to 35% by mass, and more preferably 5 to 30% by mass, based on the total amount of the cosmetic composition. When the amount of the component (a) is less than 1% by mass, a sufficient coating film cannot be formed, and when the amount is more than 40% by mass, the coating film cannot be dissolved in an aqueous solvent, which is not preferable from the viewpoints of the above.
< (b) powder
The powder (b) (hereinafter, may be simply referred to as "component (b)") to be blended in the aqueous cosmetic composition of the present invention is generally used for cosmetic compositions, and is not particularly limited, and examples thereof include pigments, pearlescent pigments (pearlescers), glitters, functional pigments, and the like.
The pigment includes an organic pigment and an inorganic pigment, and the inorganic pigment includes an extender pigment, a coloring pigment, a white pigment, and the like.
The organic pigment is not limited, and examples thereof include: lithol Rubine BCA (Red 202), lake Red C (Red 203), lake Red CBA (Red 204), Lithol Red (Red 205), Lithol Red CA (Red 206), Lithol Red BA (Red 207), Lithol Red SR (Red 208), Brilliant lake Red R (Red 219), deep purple Red (Red 220), toluidine Red (Red 221), permanent Red (Red 228), permanent orange (orange 203), benzidine orange G (orange 204), benzidine yellow G (yellow 205), fast bright scarlet (Red 404), permanent Red F5R (Red 405), Hansa orange (orange 401), Hansa yellow (yellow 401), phthalocyanine blue (blue 404) and the like.
The extender pigment is not limited, and includes: pulverized clay minerals such as mica, sericite, talc, and kaolin, silicic anhydride, cerium oxide, silica, zinc stearate, synthetic talc, barium sulfate, bismuth oxychloride, aluminum oxide, and magnesium carbonate.
As the coloring pigment, there can be mentioned: iron oxide (red iron oxide), iron titanate, gamma-iron oxide, yellow iron oxide, loess, black iron oxide, carbon, titanium suboxide, mango violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt titanate, ultramarine, prussian blue, etc.
As the white pigment, there can be mentioned: titanium dioxide, zinc oxide, and the like.
As pearlescent pigments (pearling agents), there can be mentioned: titanium dioxide-coated mica (mica titanium), iron oxide-coated mica titanium, carmine/prussian blue-coated mica titanium, iron oxide/carmine-treated mica titanium, prussian blue-treated mica titanium, iron oxide/prussian blue-treated mica titanium, chromium oxide-treated mica titanium, titanium oxide biotite titanium, acrylic resin-coated aluminum powder, titanium oxide-coated mica, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, colored titanium oxide-coated mica, titanium oxide-coated synthetic mica, titanium oxide-coated silica, titanium oxide-coated alumina, titanium oxide-coated glass powder, polyethylene terephthalate/polymethyl methacrylate laminated film powder, bismuth oxychloride, fish scale foil, and the like.
As the glitter, resins and metal powders can be used, and examples thereof include: polyethylene terephthalate/aluminum/epoxy resin laminate powder, polyethylene terephthalate/aluminum laminate powder, polyethylene terephthalate/gold laminate powder, polyethylene terephthalate/polyolefin laminate film powder, polyethylene terephthalate/polymethyl methacrylate laminate film powder, polyethylene/polyester laminate powder, polyethylene/polyethylene terephthalate laminate powder, acrylic resin-coated aluminum powder, and the like. Further, those obtained by coloring these powders with a legal pigment or an inorganic pigment may be used.
As the powder of the pigment, the pearling agent, the glittering agent, etc., a hydrophilized powder may be used. As the hydrophilized powder, a powder subjected to hydrophilization treatment known in the art can be used. The hydrophilization treatment may be either organic or inorganic. The hydrophilization treatment agent is not particularly limited, and includes: polyhydric alcohol, polysaccharides, water-soluble polymers, metal alkoxide, water glass, and the like.
As functional pigments, there may be mentioned: boron nitride, photochromic pigment, synthetic fluorophlogopite, iron-containing synthetic fluorophlogopite, fine particle composite powder (mixed fine powder), etc.
The amount of component (b) in the aqueous cosmetic composition of the present invention is 0.5 to 3.0% by mass, preferably 1.0 to 2.0% by mass, and more preferably 1.2 to 1.8% by mass, based on the total amount of the cosmetic composition. If the amount of component (b) is less than 0.5% by mass, a desirable appearance cannot be obtained, and the film tends to be difficult to peel off when the cosmetic is prepared into a poultice cosmetic. If the content exceeds 3.0 mass%, there is a possibility that powder sedimentation and gelation occur.
< (c) at least two polysaccharide thickeners
The at least two polysaccharide thickeners (c) (hereinafter, may be abbreviated as "component (c)") to be blended in the aqueous cosmetic composition of the present invention are polysaccharides for adjusting the viscosity of the composition in the general cosmetic field, and are not limited, and include: plant polysaccharides, microbial polysaccharides, cellulose polysaccharides, and the like.
The plant polysaccharides include: acacia, tragacanth gum, galactan, guar gum, locust bean gum, tamarind gum, carob gum, karaya gum, carrageenan, pectin, agar, quince seed (quince), seaweed gum (brown algae extract), starch (rice, corn, potato, wheat), glycyrrhizic acid, and the like.
The microbial polysaccharides include: xanthan gum, dextran, succinoglycan, pullulan (pullulan, japanese original: ブルラン), and the like.
The cellulose-based polysaccharides include: methylcellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose, sodium carboxymethylcellulose, crystalline cellulose, cellulose powder, and the like.
In the aqueous cosmetic of the present invention, at least two kinds selected from the polysaccharide thickeners described above may be used in combination, and among these, at least two kinds selected from xanthan gum, succinoglycan and carboxymethyl cellulose are preferably used in combination. In the aqueous cosmetic composition of the present invention, by blending at least two kinds of polysaccharide thickeners, sedimentation and aggregation of the blended powder components can be suppressed, and dispersion stability can be improved.
The amount of component (c) in the aqueous cosmetic composition of the present invention is 0.01 to 3.0% by mass, preferably 0.05 to 2.0% by mass, and more preferably 0.1 to 1.0% by mass, based on the total amount of the cosmetic composition. If the amount of the component (c) is less than 0.01% by mass, it is not effective for preventing sedimentation of the powder, and if it exceeds 3.0% by mass, gelation may occur and usability may be deteriorated, which is not preferable.
(d) a vinyl water-soluble thickener
The vinyl water-soluble thickener (d) (hereinafter, may be abbreviated as "component (d)") to be blended in the aqueous cosmetic of the present invention is a water-soluble synthetic polymer for adjusting the viscosity of a composition in the field of general cosmetics, and is herein referred to as a substance other than polyvinyl alcohol. The component (d) is not limited, and includes: polyvinyl methyl ether, polyvinyl pyrrolidone, carboxyvinyl polymers, and the like.
The cosmetic composition of the present invention contains a vinyl water-soluble thickener, and thus has an effect of improving the dispersibility of the powder when left to stand. In addition, by using a vinyl-based water-soluble thickener which is generally used for preparing a high-viscosity preparation, the viscosity of the cosmetic product at the time of standing still tends to be further increased, and aggregation of the powder component tends to be suppressed. Examples of vinyl-based water-soluble thickeners that can be used to prepare high viscosity formulations include: carbopol 980 (manufactured by Lubrizol Advanced Materials, Inc.), Carbopol 981 (manufactured by Lubrizol Advanced Materials, Inc.), Synthalen K (manufactured by 3V SIGMA), Synthalen L (manufactured by 3V SIGMA).
The amount of component (d) in the aqueous cosmetic composition of the present invention is 0.01 to 1.0% by mass, preferably 0.02 to 0.2% by mass, and more preferably 0.03 to 0.1% by mass, based on the total amount of the cosmetic composition. If the blending amount of the component (d) is less than 0.01 mass%, the dispersibility of the powder is poor, and the static viscosity of the whole cosmetic is lowered, so that the powder is liable to settle. If the content exceeds 0.2% by mass, the powder tends to aggregate, and if it exceeds 1.0% by mass, the powder aggregates, which is not preferable.
< (e) hydrophilic nonionic surfactant
The hydrophilic nonionic surfactant (hereinafter, may be simply referred to as "component (e)") to be blended in the aqueous cosmetic composition of the present invention is not particularly limited, and includes: POE sorbitol fatty acid esters such as POE sorbitan monooleate, POE sorbitan monostearate, POE sorbitan fatty acid esters, POE sorbitol monolaurate, POE sorbitol monooleate, POE sorbitol pentaoleate, and POE sorbitol monostearate; POE glycerin fatty acid esters such as POE glycerin monostearate, POE glycerin monoisostearate, and POE glycerin triisostearate; POE fatty acid esters such as POE monooleate, POE monostearate, POE distearate, POE monooleate, and ethylene glycol distearate; POE alkyl ethers such as POE lauryl ether, POE oleyl ether, POE stearyl ether, POE behenyl ether, POE 2-octyl dodecyl ether, and POE cholesteryl ether; POE alkylphenyl ethers such as POE octylphenyl ether, POE nonylphenyl ether, and POE dinonylphenyl ether; pluronic types such as Pluronic (polyoxyethylene-polyoxypropylene glycol); POE-POP alkyl ethers such as POE-POP cetyl ether, POE-POP 2-decyltetradecyl ether, POE-POP monobutyl ether, POE-POP hydrogenated lanolin, and POE-POP glyceryl ether; TEtronic and other tetrapOE-tetrapPOP ethylenediamine condensates; POE castor oil hydrogenated castor oil derivatives such as POE castor oil, POE hydrogenated castor oil monoisostearate, POE hydrogenated castor oil triisostearate, POE hydrogenated castor oil monopyroglutamic acid monoisostearic acid diester, and POE hydrogenated castor oil maleic acid; POE beeswax/lanolin derivatives such as POE sorbitol beeswax, alkanolamides such as coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, and fatty acid isopropanolamide; POE propylene glycol fatty acid ester, POE alkylamine, POE fatty acid amide, sucrose fatty acid ester, POE nonylphenyl formaldehyde condensate, alkyl ethoxy dimethylamine oxide, trioleyl phosphoric acid, and the like. The hydrophilic nonionic surfactant blended in the aqueous cosmetic of the present invention preferably has an HLB (hydrophilic/oil ratio) of 14 or more. Among these, polyoxyethylene glyceryl isostearate, polyoxyethylene sorbitan fatty acid ester, and polyoxyethylene hydrogenated castor oil having an HLB of 14 or more are particularly preferable. The nonionic surfactant used in the present invention may be compounded singly or in combination of two or more kinds.
In the aqueous cosmetic composition of the present invention, when a hydrophilic nonionic surfactant, specifically a nonionic surfactant having an HLB of 14 or more is blended, it contributes to suppressing sedimentation of powder components blended in the cosmetic composition at the time of standing.
The amount of component (e) in the aqueous cosmetic composition of the present invention is 0.1 to 5.0% by mass, preferably 0.2 to 2.0% by mass, based on the total amount of the cosmetic composition. If the blending amount of the component (e) is less than 0.1 mass%, the dispersibility of the powder tends to be poor.
By blending the components (a) to (e) in the aqueous cosmetic of the present invention, an aqueous cosmetic can be obtained which can suppress the sedimentation/aggregation of the powder with time, has excellent dispersion stability, and has excellent dispersibility of the powder when left to stand, even when more powder than ever is blended.
The suitable viscosity of the aqueous cosmetic composition of the present invention varies depending on the application, and is preferably, for example, 70000mPa · s or less as measured at 30 ℃ using a BL type viscometer. When the aqueous cosmetic of the present invention is prepared as a pull-off dressing cosmetic, the viscosity of the cosmetic is preferably 20000 to 70000mPa · s, and more preferably 30000 to 50000mPa · s, from the viewpoint of ease of spreading the cosmetic on the skin.
The aqueous cosmetic of the present invention does not need to be compounded with a general-purpose clay mineral in order to adjust the viscosity of the cosmetic. Therefore, the aqueous cosmetic of the present invention comprises a mode in which the clay mineral is not compounded.
In the cosmetic of the present invention, in addition to the above-mentioned essential components, components generally used in cosmetics, for example, water, oil, alcohols, moisturizers, lipophilic surfactants, oily active agents, oil phase thickeners, whitening agents, anti-inflammatory agents, various plant extracts, pH adjusters, dispersants, antioxidants, perfumes, stabilizers and the like may be appropriately blended as necessary.
The aqueous cosmetic of the present invention is useful as a skin care cosmetic, an application cosmetic for skin, lips and nails, a makeup cosmetic, and the like. Among them, the cosmetic of the present invention has a characteristic that it is easily spread on the skin due to its moderate viscosity and is excellent in the dryness after application, and therefore, it is particularly suitable as a pull-off type application cosmetic.
The cosmetic of the present invention can be produced as an aqueous cosmetic compounded with the powder by a conventional method.
[ examples ]
The present invention will be described in more detail below with reference to specific examples, but the present invention is not limited to the following examples. The amount of the compound in the following examples and the like represents% by mass unless otherwise specified.
Before carrying out the examples, the influence of surfactants having different HLB on the dispersibility of the powder was investigated. Specifically, the components shown in table 1 below were mixed and dissolved to prepare samples 1 to 7 containing surfactants having different HLB, and the state of sedimentation of the powder components over time was visually observed.
[ Table 1]
Figure BDA0002649213540000101
The higher the HLB of the compounded surfactant, the slower the settling rate of the powder. Therefore, it is found that the higher the HLB of the surfactant to be blended, the more the effect of suppressing the sedimentation of the powder component.
Next, samples having the compositions shown in table 2 below were prepared, and evaluated for (1) measurement of viscosity and (2) evaluation of stability (sedimentation and aggregation of powder components, layer separation of solution). The evaluation was performed as follows.
(1) Measurement of viscosity
The prepared sample was allowed to stand at 30 ℃ for 1 day, and then the viscosity (mPas) was measured by means of a BL type viscometer (rotor No.6, 10 rotations).
(2) Evaluation of stability
The prepared sample was left to stand at 70 ℃ for 3 days, and then the appearance was visually observed to evaluate the presence or absence of sedimentation and aggregation of the powder component and the presence or absence of phase separation of the whole sample.
Examples 1 to 4 and comparative examples 1 to 2
In the compositions shown in table 2 below, the components in the aqueous phase were heated and mixed, and then the other components were added and mixed to prepare a cosmetic preparation for a pull-off type application.
[ Table 2]
Figure BDA0002649213540000111
As shown in the above table, in the case where only one kind of polysaccharide thickener was blended (comparative examples 1 and 2), sedimentation and aggregation of the powder component with time were observed, and separation of the solution was observed. As is clear from comparison between example 2 and comparative example 2, even when the amount of polyvinyl alcohol added is the same, a cosmetic having excellent dispersion stability of powder and an appropriate viscosity can be obtained by adding two or more kinds of polysaccharide thickeners. The cosmetics of examples 1 to 4 also had good spreading and spreading properties on the skin. The cosmetics of examples 2 to 4, which were prepared by combining polyvinyl alcohols having different viscosities, were more excellent in powder dispersibility than the cosmetic of example 1, which was prepared by mixing polyvinyl alcohol having only a single viscosity.
It has been investigated whether the cosmetic of the present invention can be obtained when another aqueous phase thickener is used in the cosmetic of the present invention instead of the polysaccharide thickener and the vinyl water-soluble thickener.
[ Table 3]
Figure BDA0002649213540000121
As shown in table 3, in the cosmetic of the present invention, in the case of using other aqueous phase thickener instead of the polysaccharide thickener and the vinyl-based water-soluble thickener, sedimentation and aggregation of the powder and separation of the solution were observed. Therefore, in the polyvinyl alcohol-based cosmetic composition of the present invention containing a large amount of powder, sedimentation and aggregation of the powder are not suppressed by the clay mineral which is generally used for adjusting the viscosity of the cosmetic composition.
Therefore, by blending the components (a) to (e) of the present invention, a cosmetic excellent in dispersion stability of the powder can be obtained in which the powder is sufficiently inhibited from settling and aggregation with time. The obtained cosmetic has an appropriate viscosity, and therefore has excellent spreadability on the skin.
Formulation example 1: tear-off type cosmetic for application
Figure BDA0002649213540000131
Formulation example 2: tear-off type cosmetic for application
Figure BDA0002649213540000132
Figure BDA0002649213540000141
Formulation examples 1 and 2 the aqueous phase ingredients of the above-mentioned compounding ingredients were mixed under heating, and then other ingredients were added and mixed to prepare a cosmetic preparation for a pull-off type application. The cosmetic compositions of any formulation examples had a viscosity suitable for spreading on the skin and also had excellent dispersion stability of the powder component.

Claims (6)

1. An aqueous cosmetic comprising:
a) polyvinyl alcohol,
b) Powder, a,
c) At least two polysaccharide thickeners,
d) A vinyl water-soluble thickener,
e) A hydrophilic nonionic surfactant.
2. The aqueous cosmetic according to claim 1, which does not contain a clay mineral.
3. The aqueous cosmetic according to claim 1 or 2, wherein the c) polysaccharide thickener is two selected from succinoglycan, xanthan gum and carboxymethyl cellulose.
4. The aqueous cosmetic according to any one of claims 1 to 3, wherein the d) vinyl-based water-soluble thickener is a carboxyvinyl polymer.
5. The aqueous cosmetic according to any one of claims 1 to 4, wherein the e) hydrophilic nonionic surfactant has HLB of 14 or more.
6. The aqueous cosmetic according to any one of claims 1 to 5, which is a pull-off dressing cosmetic.
CN201980015363.3A 2018-02-28 2019-02-27 Aqueous cosmetic Pending CN111757726A (en)

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