Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
  • A61K8/89—Polysiloxanes
  • A61K8/891—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/04—Dispersions; Emulsions
  • A61K8/042—Gels
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/0241—Containing particulates characterized by their shape and/or structure
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/31—Hydrocarbons
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/73—Polysaccharides
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
  • A61K8/89—Polysiloxanes
  • A61K8/895—Polysiloxanes containing silicon bound to unsaturated aliphatic groups, e.g. vinyl dimethicone
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
  • A61K2800/26—Optical properties
  • A61K2800/262—Transparent; Translucent

Definitions

• the present invention relates to a skin cosmetic comprising a gar hydrogel particles. More specifically, it relates to a skin cosmetic prepared by mixing agar hydrogel particles and an oil based gel to have the agar hydrogel particles dispersed in the oil based gel wherein said skin cosmetic manifests superior texture.
• Patent Document 1 discloses a composite composition prepared by dispersing small spheres of a water based composition containing agar in a gelated or solidified oil based composition containing 12-hydroxystearic acid; it mentions that said composite composition can be used for makeup cosmetics such as lip gloss.
• the oil based gel which forms the outer phase (continuous phase)
• the oil based gel which forms the outer phase (continuous phase)
• the pressure of finger scooping in repeated use may gradually destroy the gel and the small spheres may precipitate.
• a high-viscosity oil component such as polybutene is blended into the oil based gel, which forms the outer phase (continuous phase)
• the spreading is heavy and stickiness tends to arise, which gives it an unfavorable texture during use as a skin care cosmetic.
• Patent Document 2 discloses a skin cosmetic prepared by dispersing particles having an average particle size of 0.1-5 mm and containing agar into a transparent or semi-transparent base agent having a viscosity of 300-5,000 mPa-s.
• Patent Document 3 discloses a cosmetic containing capsules enclosing an oil-in-water emulsion wherein the capsule membrane is composed of calcium alginate in the amount of 0.1-1.0 wt % relative to the total amount of the capsule.
• Patent Document 4 discloses a capsule-enclosed cosmetic in which barium alginate capsules, in which at least a part of the alginate exists in the form of a multivalent metal salt having barium salt as an essential ingredient, exist in the outer phase composed of a pH-adjusted aqueous solution of a carboxyvinyl polymer.
• Patent Document 5 discloses a water-containing cosmetic containing soft capsules and spheres whose base agent is agar.
• the alginate capsules used in Patent Documents 3 and 4 are prepared by reacting water soluble alginate with water soluble calcium salt to generate water insoluble calcium alginate, and there is a shortcoming in that, when they are applied on the skin, residue from the capsules stay on the skin to cause an unpleasant sensation.
• the water-containing cosmetic of Patent Document 5 is limited in terms of the blend ratio of the oil component and therefore there is a shortcoming in that it is very difficult to give it a skin protection effect (emollient effect) and/or massage effect.
• Patent Document 2 Japanese Patent No. 3756043
• Patent Document 4 JP H11-29433 A
• Patent Document 5 JP H1-193216 A
• a skin cosmetic prepared by mixing agar hydrogel particles and an oil based gel to have the agar hydrogel particles dispersed in the oil based gel can suppress the sensation of residue of the capsules crushed of the skin and give a good massaging sensation
• the oil based gel of the outer phase in which the agar hydrogel particles are dispersed can be thickened and gelated using a mixture of silicone cross-polymer and low viscosity silicone oil and/or hydrocarbon oil to eliminate the concern of the gel in the outer phase being destroyed and the agar hydrogel particles precipitating, and that not blending in high viscosity oil components in the oil based gel result in good spreadability and a non-sticky texture, thus completing the present invention.
• the object of the present invention is to provide a cosmetic containing agar hydrogel particles that is a skin cosmetic aimed for skin care that has superior texture and gives a moderately good massaging sensation.
• the present invention provides a skin cosmetic comprising agar hydrogel particles having an average particle size of 0.2-5 mm obtained by stirring and cooling an agar aqueous solution, prepared such that the breaking stress after the cooling/solidification is 0.005-0.1 MPa, in an oil based solvent and an oil based gel prepared by mixing fine particles of silicone that are three-dimensionally cross-linked chemically and silicone oil and/or hydrocarbon oil.
• the present invention provides the aforementioned skin cosmetic wherein the blend ration of said agar hydrogel particles is 1-80 wt % of the total amount of the aforementioned skin cosmetic.
• the present invention provides the aforementioned skin cosmetic wherein said skin cosmetic is a massage cosmetic.
• an appropriate amount of the agar is blended in to have an agar aqueous solution having a specific breaking stress, which results in no remaining residue after it is applied on the skin and the agar hydrogel particles are crushed, giving a good texture and also a good and moderate massaging sensation because the agar hydrogel particles are crushed on the skin at the time of use.
• the oil based gel which is to be the outer phase, is thickened and gelated by a mixture of a silicone cross-polymer and a low viscosity silicone oil and/or hydrocarbon oil: therefore the gel in the outer phase is not destroyed even with repeated use and there is no concern of the agar hydrogel particles precipitating.
• the agar hydrogel particles used in the present invention are agar hydrogel particles having an average particle size of 0.2-5 mm obtained by stirring and cooling an agar aqueous solution, prepared such that the breaking stress after the cooling/solidification is 0.005-0.1 MPa, in an oil based solvent.
• the obtained agar hydrogel particles are small spheres of the hydrogel composition composed of the agar aqueous solution; since they are dispersed in the oil based solvent, they are separated by means of filtration and collected and mixed with the oil based gel, which is to be the outer phase, at room temperature to homogeneously disperse the agar hydrogel particles in the oil based gel to obtain the skin cosmetic of the present invention.
• the agar aqueous solution is a water phase composition, and the agar functions as a solidifier.
• the hardness of the formed agar hydrogel particles becomes suitable; when they are rubbed against the skin there is an advantage in that the residue of the agar hydrogel particles don't tend to remain and dewy freshness is given to the skin.
• the blend ratio of the agar in the agar aqueous solution is preferably 0.5-5 wt %, more preferably 1.0-3.0 wt % relative to the total amount of the agar aqueous solution.
• this blend ratio is less than 0.5 wt %, then the agar aqueous solution is soft and not suitable to be solidified into agar hydrogel particles; if it is more than 5.0 wt %, then the agar hydrogel particles become too hard and collapsibility on the skin becomes poor, leading to a tendency to resist crushing and a sensation of residue arising after crushing.
• solvent ingredients that are compatible with water, specifically lower alcohols such as ethanol, menthol, camphor and derivatives thereof (used when a fresh sensation is desired), and polyhydric alcohols such as propylene glycol, butylene glycol, and glycerin (used when moisture retention is desired) can be blended in the agar aqueous solution.
• lower alcohols such as ethanol, menthol, camphor and derivatives thereof (used when a fresh sensation is desired)
• polyhydric alcohols such as propylene glycol, butylene glycol, and glycerin (used when moisture retention is desired) can be blended in the agar aqueous solution.
• ingredients that are compatible with water can be blended in, such as surfactants, ultraviolet protection agents, preservatives, antioxidants, pH adjustment agents, chelating agents, polymer compounds, thickeners, perfumes, and water soluble drugs.
• the agar hydrogel particles containing these ingredients are obtained and a skin cosmetic having a fresh sensation and moisture retaining properties can be prepared.
• the aforementioned optional ingredients are blended into the agar aqueous solution in the amounts that are appropriate for the purpose.
• the blend ratio of water in the agar aqueous solution is not limited in particular; preferable is 1-50 wt % relative to the total amount of the agar aqueous solution.
• agar aqueous solution so the obtained agar hydrogel particles are colored for the purpose of making it easy to see the agar hydrogel particles dispersed in the oil based gel in the outer phase.
• Coloring can be done by dispersing a pigment such as iron oxide and/or a pearl agent or by adding an oil based component to the agar aqueous solution to emulsify it, thereby turning the obtained agar hydrogel particles opaque.
• a pigment such as iron oxide and/or a pearl agent
• an oil based component to the agar aqueous solution to emulsify it, thereby turning the obtained agar hydrogel particles opaque.
• the agar aqueous solution that gives a breaking stress of 0.005-0.1 MPa after cooling and solidification can be prepared by appropriately selecting the blend ratios of the agar and other water soluble optional ingredients to be blended into the agar aqueous solution, dissolving the agar and other water soluble optional ingredients in hot water, followed by cooling and solidification and checking to see if the breaking stress is in the range of 0.005-0.1 MPa.
• the breaking stress is measured by using a rheometer (COMPAC-100 II from Sun Scientific Co., Ltd.) after the agar aqueous solution is cooled and solidified.
• breaking stress is less than 0.005 MPa, then it is difficult to obtain a sufficient massaging effect: if the breaking stress is over 0.1 MPa, then the agar hydrogel particles become too hard and the collapsibility on the skin becomes poor, resulting in harder crushing and a tendency for residue to remain.
• the average particle size of the agar hydrogel particles used in the present invention is 0.2-5 mm.
• the average particle size is a value obtained by observing the agar hydrogel particles visually or with a microscope and such and averaging the particle size any 100 agar hydrogel particles.
• an agar aqueous solution dissolved in a pot at a temperature of 65-80° C. is discharged through a nozzle having an aperture of 0.5-8 mm into an oil based solvent at a temperature of approximately 40° C. in another pot.
• this mixture is sufficiently stirred and cooled down to approximately 30° C.; the mixture is filtered and separated and collected to obtain agar hydrogel particles having a desired average particle size.
• an oil component that is relatively low in viscosity and compatible with the outer phase gel such as cyclomethicone (decamethylpentacyclosiloxane), dimethylpolysiloxane, methylphenylpolysiloxane, and liquid paraffin.
• a mixture of fine particles of silicone that are three-dimensionally cross-linked chemically and low viscosity silicone oil and/or hydrocarbon oil is used. It is sufficient if at least either the low viscosity silicone oil or the hydrocarbon oil is mixed with the fine particles of silicone that are three-dimensionally cross-linked chemically.
• oils based gel examples include the KSG series from Shin-Etsu Chemical Co., Ltd. (KSG-15, KSG-1610, KSG-16, KSG-41, KSG-42, KSG-44, KSG-210, KSG-240, KSG-310, KSG-320, KSG-330, KSG-340, KSG-710, KSG-810, KSG-820, KSG-830, and KSG-840), the silicone elastomer blend from Dow Corning Toray (9040, 9045, 9140DM, 9041, 9546, and FB-9586), and the silicone organic elastomer blend from Dow Corning Toray (EL-8040 ID and EL-8541 IN).
• KSG-15 KSG-1610, KSG-16, KSG-41, KSG-42, KSG-44, KSG-210, KSG-240, KSG-310, KSG-320, KSG-330, KSG-340, KSG-710, KSG-810, KSG-820, KSG-830
• fine particles of silicone that are three-dimensionally cross-linked chemically, specifically it is preferable to use fine particles of dimethylpolysiloxane, vinyl dimethylpolysiloxane, polyether-modified silicone, alkyl-modified silicone, and polyglycerin-modified silicone and such that are cross-linked there-dimensionally.
• dimethylpolysiloxane decamethylcyclopentasiloxane, isododecane, squalane, etc. having a viscosity of approximately 2-100 mPa-s at 20° C.
• the oil component of the oil based gel of the outer phase is the fine particles of silicone that are three-dimensionally cross-linked chemically and low viscosity silicone oil and/or hydrocarbon oil, or other low viscosity oil components other than these are also used but the viscosity of the oil based gel is still approximately 5,000-50,000 mPa-s at 20° C., the shortcoming of Patent Document 1 of using a high viscosity oil component is resolved and good spreadability and a non sticky texture can be manifested.
• oil components that can usually be used in external compositions can be selected as appropriate and blended into the aforementioned oil based gel.
• ester oils such as cetyl-2-ethylhexanoate, 2-ethylhexyl palmitate, 2-octyldodecyl myristate, neopentyl glycol-2-ethylhexanoate, glyceryl trioctanoate, pentaerythritol tetraoctanoate, glyceryl triisosterate, glyceryl diisosterate, isopropyl myristate, myristyl myristate, and glyceryl trioleate: fats and oils such as olive oil, avocado oil, jojoba oil, sunflower oil, safflower oil, tsubaki oil, shea oil, macadamia nut oil, mink oil, lanolin, liquid lanolin, lanolin a
• oils based gel can be blended into the oil based gel, such as surfactants, ultraviolet protection agents, preservatives, antioxidants, chelating agents, film forming agents, polymer compounds, perfumes, and oil based drugs.
• the oil based gel is preferably semi-transparent to transparent. This is because then consumers can visually confirm the agar hydrogel particles dispersed in the oil based gel and the skin cosmetic can manifest an appealing external appearance.
• “Semi-transparent to transparent” in the present invention is determined by visual observation. “Semi-transparent” means the level at which the agar hydrogel particles dispersed in the oil based gel are vaguely visible and “transparent” means they can be seen clearly.
• color ingredients such as coloring agents, dyes, pearl agents, and lamella agents can be blended in within the range that the agar hydrogel particles can be visually recognized.
• the skin cosmetic of the present invention is a composite composition that is the aforementioned agar hydrogel particles homogeneously dispersed in the oil based gel.
• the blend ratio of the agar hydrogel particles is preferably 5-80 wt % relative to the total amount of the skin cosmetic.
• the blend ratio of the oil based gel is preferably 10-80 wt % relative to the total amount of the skin cosmetic.
• the preparation method of the skin cosmetic of the present invention is not limited in particular; it suffices to mix the agar hydrogel particles and the oil based gel and disperse the agar hydrogel particles homogeneously in the oil based gel, which is to be the outer phase.
• a hose is connected to a pot that contains an agar aqueous solution, an nozzle having an aperture of approximately 0.5-8 mm is attached to the tip of the hose, and the agar aqueous solution, in a heated and melted state, is added through said nozzle into an oil based solvent, followed by stirring.
• stirring force small sphere-like agar hydrogel particles are formed in the liquid oil component (the faster the speed of the stirring, the smaller the particle size of the small spheres), and the agar hydrogel particles in the liquid oil component are separated and collected.
• the collected agar hydrogel particles are added into the heated oil based gel and stirred to be homogeneously dispersed and then cooled to prepare the skin cosmetic of the present invention.
• the skin cosmetic of the present invention is preferably used as a skin cosmetic for skin care containing skin care ingredients. Also, since it has a moderate massaging effect, it can also be used as a massaging cosmetic.
• the present invention is described in detail below by referring to Examples. The present invention is not limited to these Examples.
• the blend ratio is expressed in wt % units relative to the total amount of the agar aqueous solution or the total amount of the skin cosmetic.
• the jelly strength of the agar aqueous strength was measured with a rheometer (COMPAC-100 II from Sun Scientific Co., Ltd.).
• Agar Hydrogel Particles (Hydrogel Particles 1) Composition
• the breaking stress of the aforementioned agar aqueous solution is 0.025 MPa and the average particle size of the agar hydrogel particles is 1.5 mm.
• the breaking stress of the aforementioned sodium alginate aqueous solution is 0.12 MPa and its average particle size is 1 mm.
• Example 2 Example 1 Example 2 Example 3 (Dimethicone/Vinyl dimethicone) 35 35 crosspolymer (Shin -Etsu Chemical Co., Ltd, KSG - 15) *1 Dimethicone crosspolymer 35 (Silicone elastomer blend 9041 from Dow Corning Toray) *2 Decamethylcyclopentasiloxane 5 5 5 (Viscosity 4 mPa-s, 20° C.) Carboxyvinyl polymer 0.3 0.3 Potassium hydroxide 0.15 0.15 Ion-exchanged water 39.55 39.55 Agar hydrogel particles (hydrogel 60 60 60 particles 1) Sodium alginate capsules 60 60 (Hydrogel particles 2) Moisture retaining (emollient) ⁇ ⁇ x x ⁇ effect Spreadability on the skin ⁇ ⁇ ⁇ ⁇ ⁇ Residue remaining after application ⁇ ⁇ ⁇ x x on the skin
• the hydrogel particles were mixed and stirred until they were homogeneous to obtain a skin cosmetic.
• the evaluation method is as follows.
• ⁇ Five or more specialists of the panel evaluated that they felt the moisture retaining (emollient) effect.
• ⁇ Two to four specialists of the panel evaluated that they felt the moisture retaining (emollient) effect.
• x Zero to one specialist of the panel evaluated that they felt the moisture retaining (emollient) effect.
• ⁇ Five or more specialists of the panel evaluated that they felt good spreadability on the skin.
• ⁇ Two to four specialists of the panel evaluated that they felt good spreadability on the skin.
• ⁇ Five or more specialists of the panel evaluated that they didn't feel the remaining residue after application on the skin.
• ⁇ Two to four specialists of the panel evaluated that they didn't feel the remaining residue after application on the skin.
• x Zero to one specialist of the panel evaluated that they didn't feel the remaining residue after application on the skin.
• ⁇ Perceived Massaging Effect when Applied on the Skin> ⁇ : Five or more specialists of the panel evaluated that they felt a massaging effect after application on the skin.
• ⁇ Two to four specialists of the panel evaluated that they felt a massaging effect after application on the skin.
• x Zero to one specialist of the panel evaluated that they felt a massaging effect after application on the skin.
• ⁇ After storage for one month at ⁇ 5° C. to 50° C., there is no change in color or characteristics before and after the storage.
• x After storage for one month at ⁇ 5° C. to 50° C., there is substantial change in color or characteristics before and after the storage.
• ⁇ The agar hydrogel particles can be visually recognized from the external appearance when the sample was put into a glass container.
• x The agar hydrogel particles cannot be visually recognized from the external appearance when the sample was put into a glass container.
• Hydrogel particles are homogeneously dispersed in the oil phase.
• Hydrogel particles are precipitated and not homogeneously dispersed.
• Example 1 and Example 2 of the present invention manifest superior effects for all the evaluation items, i.e. “Moisture retaining (emollient) effect”, “Spreadability on the skin”, “Residue remaining after application on the skin”, and “Stability. ”
• Agar Hydrogel Particles (Hydrogel Particles 3) Composition
• Ingredients 1-6 were heated up to 90° C., mixed with a mixed emulsion of 7-10, and discharged through a nozzle having an aperture of 8 mm into decamethylcyclopentasiloxane at 40° C. ; the mixture was cooled down to 30° C. as it was stirred and the outer oil liquid was filtered out with a sifter or filtering cloth having an appropriate mesh size to obtain Agar hydrogel particles 2 (Hydrogel particles 3).
• the breaking stress of the aforementioned agar aqueous solution is 0.02 MPa and the average particle size of the agar hydrogel particles is 1 mm.
• hydrogel particles After mixing (dimethicone/vinyl dimethicone) crosspolymer and cyclomethicone homogeneously, the hydrogel particles were mixed and stirred until they were homogeneous to obtain a skin cosmetic.
• 12-hydroxystearic acid, dextrin palmitate, glyceryl (behenate/eicosanedioate), etc. were added to a liquid oil component that had been heated up to 90° C., and melted; after cooling down to approximately 70 degrees, the hydrogel particles were mixed and left at rest to solidify to obtain a skin cosmetic.
• Example 3 that uses an oil based gel prepared by mixing fine particles of silicone chemically cross-linked three dimensionally ((dimethicone/vinyl dimethicone) crosspolymer) and a low viscosity silicone oil (decamethylcyclopentasiloxane) is superior to Comparative example(s) using other oil components in all the evaluation items of “spreadability on the skin”, “visibility of the hydrogel particles”, and “homogeneous dispersibility of the hydrogel particles in the oil phase.”
• Agar hydrogel particles (hydrogel particles 4-7)
• Agar hydrogel particles (hydrogel particles 4-7) 4 5 6 7 1 Ion-exchanged water 80.1 79.5 78.5 75.4 2 Glycerin 10 10 10 10 3 1,3-butylene glycol 4 4 4 4 4 Dipropylene glycol 5 5 5 5 5 Agar (CS-110 from Ina Food 0.4 2 5.1 Industry. Co., Ltd.) 6 Agar (PS-84 from Ina Food 0.5 Industry, Co., Ltd.) 7 Phenoxy ethanol 0.5 0.5 0.5 0.5 Breaking stress of the agar 0.0035 0.015 0.024 0.14 aqueous solution (MPa) Average particle size of the 1.5 1.5 1.5 1. 5 agar hydrogel particles (mm)
• Example 8 Example 9 (Dimethicone/Vinyl dimethicone) 50 50 50 50 crosspolymer (Shin-Etsu Chemical Co., Ltd, KSG - 15) *1 Agar hydrogel particles (hydrogel 50 particles 4) Agar hydrogel particles (hydrogel 50 particles 5) Agar hydrogel particles (hydrogel 50 particles 6) Agar hydrogel particles (hydrogel 50 particles 7) Perceived massaging effect when ⁇ ⁇ x ⁇ applied on the skin Residue remaining after application ⁇ ⁇ ⁇ x on the skin *1: A combination of 4 wt % of three-dimensionally cross-linked silicone composed of dimethylpolysiloxane and vinyl dimethylpolysiloxane and 96 wt % of decamethylcyclopentasiloxane (4 mPa-s (20° C.)) as a solvent for it to swell.
• the (dimethicone/vinyl dimethicone) crosspolymer and the agar hydrogel particles were mixed at room temperature to obtain skin cosmetics of Examples and Comparative examples.
• Example 4 and Example 5 in which the breaking stress of the agar aqueous solution meets the requirement of the present invention, are indicated to have superior effects in terms of “perceived massaging effect after application of the skin” and “residue remaining after application of the skin.”
• the skin cosmetic of the present invention has a superior texture due to specific agar hydrogel particles dispersed in a specific oil based gel; and it is very useful as a skin cosmetic having excellent visibility of the agar hydrogel particles. In particular, it has a high utility value as a massaging cosmetic for skin care giving a moderate massaging sensation.

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