HK1129303B - Agent for improving fine wrinkles - Google Patents

Description

Fine texture improving agent

Technical Field

The present invention relates to a skin external preparation and a cosmetic method for improving fine wrinkles.

Background

As skin ages with age, wrinkles increase as a phenomenon of skin aging, and wrinkles are roughly classified into deep lines, fine lines, and wrinkles according to their generation sites, generation mechanisms, and the like. Deep wrinkles are deep wrinkles generated mainly in the forehead, the back of the neck, etc. due to photoaging, fine wrinkles are relatively shallow wrinkles generated in the canthus and the corner of the mouth, and wrinkles are wrinkled wrinkles generated in non-exposed parts such as the abdomen of the elderly.

In recent years, interest in beauty care has been increased particularly in middle-aged and elderly women, and interest in fine wrinkles formed in the canthus and the corner of the mouth has been increased due to a decrease in sebum production resulting from a decrease in the water retention capacity of the horny layer of the epidermis and a decrease in the secretion of epidermal lipids accompanying the increase in age.

Cosmetics for fine lines are roughly classified into a skin masking (make up) preparation that makes the skin visually unnoticeable and a skin care preparation that brings about an improvement effect by continuous use.

Skin masking preparations in which fine lines are visually inconspicuous by smoothing irregularities and correcting the color of the skin have been reported, for example, as preparations in which the irregularities of fine lines are inconspicuous by blurring the irregularities due to the light diffusion effect of spherical powders (for example, patent documents 1 and 2), as well as preparations in which the fine lines are smoothed due to the effects of filling the irregularities of waxes, polymer gels, or the like (for example, patent document 3), and as preparations using both of them. These skin masking formulations make fine lines visually unnoticeable, but do not bring about the effect of actually improving fine lines.

On the other hand, skin care preparations are known to improve fine wrinkles by incorporating various drugs, moisturizers, and the like, and for example, preparations containing drugs such as vitamin C derivatives, vitamin a or derivatives thereof (for example, patent document 4), and preparations containing moisturizers such as glycerin, sorbitol, plant liquid extracts, and collagen and the like are known. However, these skin care cosmetics are very expensive and must be continuously used for a certain period of time to bring about the fine grain improving effect.

Patent document 1: japanese laid-open patent publication No. 2002-47138

Patent document 2: japanese laid-open patent publication No. 2003-12461

Patent document 3: japanese laid-open patent publication No. 2000-16919

Patent document 4: japanese laid-open patent application No. 2002-80338

Disclosure of Invention

The purpose of the present invention is to provide a fine grain improving agent which is inexpensive and excellent in usability, and which can effectively improve fine grains in a short time without adding expensive drugs, moisturizers, and the like.

Further, an object of the present invention is to provide a cosmetic method which can effectively improve fine wrinkles in a short time without using expensive agents, moisturizers, and the like.

The present inventors have found that by applying an oily external preparation for skin having a high occlusive property of 50% or more to the skin, it is possible to efficiently retain moisture in the skin on the skin surface and significantly improve fine wrinkles in a short time, and by blending 50 to 95% by mass of an oil component containing 10 to 100% by mass of a solid or semisolid oil component and 5 to 50% by mass of a powder, it is possible to significantly improve the usability of the oily external preparation for skin without impairing the occlusive property of the oily external preparation for skin, and have completed the present invention.

Conventional oily bases having high occlusion properties such as vaseline have poor extensibility and are very poor in handling properties because they cause stickiness and shine when applied to the skin. Various attempts have been made to blend various powders in order to improve the usability of vaseline and the like, but in conventional external preparations, the blending powder forms a path through which water passes in an oily system, and the occlusive property is lowered, and the water inside the skin cannot be sufficiently retained on the skin surface, and therefore, the fine wrinkle improvement effect cannot be brought about.

The fine wrinkle-improving agent is characterized by being composed of an oily external skin preparation having an occlusive property of 50% or more, and containing 50 to 95% by mass of an oil component and 5 to 50% by mass of a powder, wherein the oil component contains 10 to 100% by mass of a solid or semisolid oil component.

The cosmetic method for improving fine wrinkles of the present invention is characterized by applying an oily external skin preparation having an occlusive property of 50% or more to the skin, the oily external skin preparation containing 50 to 95% by mass of an oil component and 5 to 50% by mass of a powder, the oil component containing 10 to 100% by mass of a solid or semisolid oil component.

In the present specification, "occlusive property" means that a sample is applied to the inner part of the forearm (2.5 mg/cm)²) The amount of percutaneous water evaporation (TEWL) after 1 hour was measured with a water evaporator and calculated by the following formula.

Occlusion (%) - (1-TEWL (coated sample)/TEWL (no sample)) × 100

The powder preferably contains spherical powder. When spherical powder is blended, the coating extensibility is good, the feeling of use can be improved, and the fine wrinkles are not conspicuous because of the light diffusion effect and the blurring of the skin unevenness when coated on the skin. The oily skin preparation for external use of the present invention can be used not only for skin care but also for makeup, and therefore, can provide a preparation having both effects of improving fine wrinkles and concealing fine wrinkles. In particular, the spherical elastic powder is preferably free from floating powder, and among these, it is more preferably blended with spherical elastic silicone powder having a high tackiness improving effect. Further, by using the spherical silica powder in combination with the elastic spherical powder or the elastic spherical silicone powder, not only the usability but also the storage stability under high-temperature longitudinal conditions can be improved.

From the viewpoint of occlusive properties, the oil component preferably contains a solid or semisolid nonpolar hydrocarbon oil component in an amount of 20 mass% or more relative to the total amount of the oil component. By blending a nonpolar hydrocarbon oil component at a high concentration, higher occlusion properties can be imparted.

Further, from the viewpoint of usability, the oil component preferably contains 5 to 50 mass% of a volatile oil component relative to the total amount of the oil component. By blending a volatile oil component, spreading of the coating is facilitated, and the stickiness after coating can be further improved.

Since the oily external preparation for skin of the present invention has an occlusive property of 50% or more, it can hold water from the inside of the skin on the skin surface and keep the skin in a plump state by the water. Therefore, fine wrinkles can be remarkably improved in a short time without using expensive medicines, moisturizers, etc.

Further, the external preparation of the present invention contains 50 to 95 mass% of oil component and 5 to 50 mass% of powder, and the oil component contains 10 to 100 mass% of solid or semisolid oil component, so that stickiness and gloss are not generated when the external preparation is applied to the skin, and high occlusion property can be imparted to the skin, and a small amount of the external preparation can impart a sufficient occlusion effect (and thus a fine wrinkle-improving effect) because the external preparation has very good extensibility.

Detailed Description

The oily external preparation for skin which constitutes the fine wrinkles improving agent of the present invention or the oily external preparation for skin used in the cosmetic method of the present invention contains an oil component containing a solid or semisolid oil component and a powder.

In the present specification, the term "fine lines" means relatively shallow wrinkles appearing at the corners of the eyes and the mouth due to dry skin, and includes fine lines due to atopic dermatitis.

In addition, the term "improvement of fine lines" or "improvement of fine lines" includes not only reduction of fine lines formed but also prevention of fine lines formed.

In the present invention, the amount of the oil component in the oily external preparation for skin is 50 to 95% by mass, more preferably 60 to 90% by mass, and still more preferably 70 to 85% by mass, based on the total amount of the external preparation. If the amount of the oil component is less than 50% by mass, high occlusion properties cannot be obtained, and if it exceeds 95% by mass, the usability is deteriorated.

The solid or semi-solid oil component used in the present invention is not particularly limited as long as it is an oily component that is solid or semi-solid at room temperature (25 ℃), and examples thereof include solid paraffin, microcrystalline wax, ozokerite, beeswax, WB wax, polyethylene wax, silicone wax, behenyl alcohol, stearyl alcohol, cetyl alcohol, batyl alcohol, carnauba wax, beeswax, candelilla wax, jojoba wax, lanolin, shellac wax, spermaceti wax, wood wax, myristic acid, palmitic acid, stearic acid, behenic acid, 12-hydroxystearic acid, cocoa butter, hardened castor oil, hardened oil, hydrogenated palm oil, hardened coconut oil, polyethylene powder, vaseline, various hydrogenated animal and vegetable oils, and lanolin fatty acid monocarboxylic acid esters. In the present invention, the solid or semi-solid oil component effectively prevents water from evaporating from the skin, and acts to retain water on the skin surface and prevent skin dryness. Therefore, the solid or semi-solid oil to be used is preferably an oil having a higher occlusion property, and a solid or semi-solid nonpolar hydrocarbon oil such as microcrystalline wax, polyethylene wax, or vaseline is preferably used.

In the present invention, the amount of the solid or semi-solid oil component is 10 to 100% by mass based on the total amount of the oil component. When the amount of the solid or semi-solid oil is less than 10% by mass, high occlusion cannot be obtained. The more preferable blending amount varies depending on the kind, combination and the like of the oil component to be used, and is not particularly limited, and is, for example, preferably 20 to 95% by mass, and more preferably 30 to 90% by mass. In particular, the non-polar hydrocarbon oil is preferably contained in a solid or semi-solid state in an amount of 20 mass% or more, more preferably 30 mass% or more, and still more preferably 40 mass% or more based on the total amount of the oil. By blending a solid or semi-solid nonpolar hydrocarbon oil component in a high blending amount, higher occlusion properties and higher high-temperature stability can be achieved.

In the present invention, it is preferable to blend a volatile oil component in the oil component from the viewpoint of usability. By blending a volatile oil component, the coating extensibility and the stickiness after coating can be further improved.

In the present specification, the volatile oil component means an oil component having volatility at room temperature (25 ℃). The volatile oil that can be used in the present invention is not particularly limited as long as the object of the present invention can be achieved, and for example, low boiling point (boiling point at normal pressure of 260 ℃ or lower) isoparaffin hydrocarbon oil, low boiling point silicone oil, and the like are preferably used.

Specific examples of the low-boiling isoparaffin hydrocarbon oil include アイソパ -A, アイソパ -C, アイソパ -E, アイソパ -G, アイソパ -H, アイソパ -K, アイソパ -L, アイソパ -M (all of which are available from エクソン), シエルゾ - ル 71(シエル), ソルトロ - ル 100, ソルトロ - ル 130, ソルトロ - ル 220 (all of which are available from フイリツプ), and the like, which are commercially available.

As the low-boiling silicone oil, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane [ e.g., "エキセコ - ル D-4" (Xinyue シリコ - ン), "SH 244", "SH 344" (each Chinese imperial レ, ダウコ - ニング, シリコ - ン) ], decamethylcyclopentasiloxane [ e.g., "エキセコ - ル D-5" (Xinyue シリコ - ン), "SH 245", "DC 345" (each Chinese imperial レ, ダウコ - ニング, シリコ - ン) ], dodecamethylcyclohexasiloxane [ e.g., "DC 246" (Chinese imperial レ, ダウコ - ニング, シリコ - ン) ], decatetramethylcycloheptasiloxane and the like are cited as preferable low-boiling silicone oils. In particular, decamethylcyclopentasiloxane is preferably blended as the volatile oil because of its excellent usability improving effect.

In the present invention, the volatile oil may be used alone in 1 kind, or may be used in combination in 2 or more kinds. The amount of the volatile oil is preferably 5 to 50% by mass, more preferably 10 to 40% by mass, and still more preferably 15 to 30% by mass, based on the total amount of the oil.

Further, as long as the object of the present invention can be achieved, a liquid oil that is liquid at room temperature (25 ℃) may be blended. In particular, since the solid oil is too hard to be used as it is and is poor in usability, it is preferable to contain the liquid oil in addition to the solid oil. Specific examples thereof include nonpolar hydrocarbon oils such as liquid paraffin and squalane, oils and fats such as olive oil, macadamia nut oil, jojoba oil and camellia oil, higher fatty acids such as oleic acid, tall oil fatty acid and isostearic acid, higher alcohols such as lauryl alcohol, oleyl alcohol, isostearyl alcohol and octyldodecanol, esters such as isohexadecyl isostearate, myristyl myristate and isopropyl palmitate, chain polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane and methylhydropolysiloxane, ultraviolet absorbers such as benzophenone derivatives, and perfumes. In particular, from the viewpoint of the occlusion property, it is preferable to blend a nonpolar hydrocarbon-based liquid oil such as liquid paraffin or squalane. The liquid oil component can be mixed with 1 kind alone or 2 or more kinds in combination. The amount of the oil to be blended is not particularly limited, and varies depending on the type and combination of the oil to be blended, but is preferably 10 to 90 mass%, more preferably 20 to 80 mass%, and still more preferably 30 to 70 mass% with respect to the total amount of the oil.

The powder used in the present invention is not particularly limited as long as the object of the present invention can be achieved. In the present invention, for example, polyethylene powder, polymethyl methacrylate powder, polystyrene powder, nylon powder, organic powder such as silicone resin powder, silicone rubber powder, silicone resin-coated silicone rubber powder, and polyurethane powder, inorganic powder such as silica powder, talc, kaolin, and sericite powder, and the like can be used. The shape of the powder is not particularly limited, but it is preferable to blend spherical powder because it not only improves the spreading extensibility but also makes the unevenness of the skin blurred by the light diffusion effect to make the fine lines visually inconspicuous. In particular, from the viewpoint of suppressing dusting, elastic spherical powder is preferable, and examples of such elastic spherical powder include spherical silicone rubber powder, spherical silicone resin-coated rubber powder, and spherical urethane powder. Among them, it is more preferable to blend an elastic spherical silicone powder having a high tack-improving effect, and if an elastic spherical silicone powder such as a spherical silicone rubber powder, a silicone resin-coated silicone rubber powder, or a zinc oxide-coated silicone resin-coated silicone rubber powder is blended, the coating is spread and lubricated without tack or floating powder, and particularly excellent usability can be obtained. Further, these powders preferably have an average particle diameter of 1 to 50 μm. Such powders are commercially available, and in the present invention, for example, トレフイル E506W (imperial レ, ダ ウ シリコ, ン) as a silicone rubber powder, シリコ, ンパウダ, KSP100 (shin-Etsu chemical) as a silicone resin-coated silicone rubber powder, and the like can be preferably used.

Further, the stability in a vertical position at a high temperature can be improved by using, for example, about 1 to 5 mass% of spherical silica powder in combination with the above elastic spherical powder or elastic spherical siloxane-based powder. The oily external preparation for skin as described in the present invention is generally stored in a horizontal position, but more preferably, stability in a vertical position can be ensured. Particularly, in the case of using a porous spherical silica powder, more favorable results can be obtained, and in the present invention, for example, SILDEX L-51 (Asahi glass Co., Ltd.), spherical シリカ P-1500 (catalytic Industrial Co., Ltd.) and the like can be preferably used.

Further, a high color unevenness hiding effect can be obtained by blending a powder obtained by coating or compounding various extender pigments with a powder having a refractive index of 1.6 or more such as barium sulfate (refractive index of 1.64), zinc oxide (refractive index of 2.0), and titanium oxide (rutile type) (refractive index of 2.7), or by simply mixing a powder having a refractive index of 1.6 or more in a part of the powder.

When simply mixed, it is preferable to blend about 0.5 to 3 mass% of a powder having a refractive index of 1.6 or more into the oily skin preparation for external use of the present invention. When the amount is 3% by mass or more, the skin color is too white when the composition is applied to the skin, and the skin looks unnatural, which is not preferable.

On the other hand, when a powder coated or compounded with a powder having a refractive index of 1.6 or more is blended, a high color unevenness concealing effect can be obtained by blending about 5 to 30 mass% of such a powder to the oily skin external preparation of the present invention. Blending a powder coated or compounded with a powder having a refractive index of 1.6 or more is preferable because it can provide a higher effect of hiding color unevenness than a powder having a refractive index of 1.6 or more simply blended and also the skin looks beautiful when applied to the skin.

The oily skin preparation for external use of the present invention may contain 1 or 2 or more kinds of powders. The amount of the powder in the oily external preparation for skin is 5 to 50% by mass, more preferably 10 to 40% by mass, and still more preferably 15 to 30% by mass, based on the total amount of the external preparation. If the amount of the powder is less than 5% by mass, the gloss, stickiness and the like of the oil component cannot be sufficiently improved, and if it exceeds 50% by mass, the blocking property is deteriorated.

When spherical powder is blended, the blending amount is usually 30 to 100% by mass, and more preferably 50 to 100% by mass, based on the total amount of the powder.

The oily skin external preparation of the present invention has an occlusion property of 50% or more, but in order to improve the fine wrinkles more effectively, it preferably has a higher occlusion property, for example, an occlusion property of 60% or more, more preferably an occlusion property of 70% or more, and still more preferably an occlusion property of 80% or more. The occlusion was achieved by spreading the sample on the inner part of the human forearm (2.5 mg/cm)²) The amount of percutaneous water evaporation (TEWL) after 1 hour was measured using a water evaporation amount measuring device such as a percutaneous water evaporation meter TM210(Courage + Khazaka), MEECO (Warrington, PA, USA), a water vapor permeability meter (Vapometer), or a percutaneous water evaporation meter (TEWA meter) (Delfin Technologies, Kupio, finland), and determined by the following formula.

Occlusion (%) - (1-TEWL (coated sample)/TEWL (no sample)) × 100

The oily skin external preparation of the present invention includes cosmetics, drugs, quasi drugs and the like. The dosage form may be in the form of a paste, or a cream.

The oily skin external preparation of the present invention may contain, in addition to the essential components, other optional components which are generally used in oily skin external preparations such as cosmetics and medicines, for example, a surfactant, an ultraviolet absorber, a perfume, an antioxidant, an antiseptic and antifungal agent, a coloring agent such as an extender pigment and a coloring pigment, and a pH adjuster, as necessary, within a range not to impair the effects of the present invention.

In addition, various agents having wrinkle-improving effects, moisturizers, and the like may be blended as necessary in the oily skin external preparation of the present invention as long as the desired effects of the present invention are not impaired. Examples thereof include vitamin A, vitamin A palmitate, vitamin A acetate, alpha-tocopherol, beta-tocopherol, delta-tocopherol, vitamin E acetate, vitamin D compounds, BHT, octyl methoxycinnamate, octyl cyanobenzoate, 2 ' -hydroxy-5-methylphenylbenzotriazole, 2- (2 ' -hydroxy-5 ' -tert-octylphenyl) benzotriazole, 2- (2 ' -hydroxy-5 ' -methylphenyl) benzotriazole, 2- (2-hydroxy-4- (2-ethylhexyl) phenoxy) -2H-benzotriazole, 4-methoxy-4 ' -tert-butylbenzoylmethane, 5- (3, 3 ' -dimethyl-2-norbornyl) -3-pentan-2-one, and mixtures thereof, 2, 4, 6-tris [ p ((2' -ethylhexyl) oxycarbonyl) anilino ]1, 3, 5-triazine, alkylaryl-1, 3-propanedione siloxane derivatives, and the like.

The oily external preparation for skin of the present invention preferably contains substantially no water or water-soluble component from the viewpoint of occlusive properties, but may be in a W/O emulsified state containing a small amount of water as long as the object of the present invention is achieved, and for example, the amount of water or water-soluble component contained in the oily external preparation for skin is 10 mass% or less, more preferably 5 mass% or less, and still more preferably 1 mass% or less.

In the cosmetic method of the present invention, the number of times, time, and the like of applying the oily skin external preparation to the skin are not particularly limited. For example, even if the application is performed for a short time (for example, overnight), the skin is plump in the next morning due to moisture remaining on the skin, so that the fine grain improving effect can be seen. More preferably, the administration is continued for, e.g., 1 week, 2 weeks, 1 month or more. By using the composition together, higher fine grain improvement effect can be obtained.

The oily skin preparation for external use of the present invention may be used alone or in combination with other skin care preparations and skin care preparations. For example, by applying the oily skin external preparation of the present invention to the end of skin care (maintenance), a more effective wrinkle-improving effect can be achieved. In addition, the oily external skin preparation of the present invention may be applied to the skin before makeup.

Furthermore, in the cosmetic method of the present invention, the skin site or method to which the oily external skin preparation is applied is not limited, and any site or method may be used as long as the effects of the present invention can be obtained.

Further, the specific application of the cosmetic method of the present invention is not particularly limited as long as it relates to fine grain improvement.

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the following examples.

Examples

1. Investigation of occlusion

The external preparations were prepared according to the respective formulations shown in Table 1 (examples 1 to 13), and the occlusion properties and the fine grain improving effect of the respective samples were evaluated by the following methods.

Evaluation of occlusion Property

The occlusive property of the external preparation was evaluated by measuring the percutaneous water evaporation amount (TEWL). For each sample, 10 panelists spread the sample on the medial aspect of the human forearm (2.5 mg/cm)²) Water content evaporator (Tewameter TM 210: courage + Khazaka) measured the amount of percutaneous water evaporation (TEWL) after 1 hour. The occlusion property was calculated by the following formula.

Occlusion (%) - (1-TEWL (coated sample)/TEWL (no sample)) × 100

Evaluation of Fine grain improvement Effect

In a fine-grained panelist (10 samples each), each sample (2 mg/cm) was spread at night before bedtime²) After being applied overnight and one month, respectivelyThe fine grain improvement effect of the external preparation was evaluated according to the following evaluation criteria:

(evaluation standards after one night coating)

A the number of panelists who responded to the fine lines and became unobvious was 7 or more

B4-6 panelists who responded that the fine lines were compact and became unobvious

C responses to tight fine lines, the panellists that became unobvious were 2-3

D response to 1 or less panelists with tight fine lines

(evaluation standard after one month coating)

A the number of panelists who responded to improvement in fine lines was 7 or more

B panelists responding to improvement in fine lines ranged from 4 to 6

C the number of panellists responding to fine grain improvement ranged from 2 to 3

D the panelists who responded to the improvement in fine lines were 1 or less

The results are shown in table 1:

the oily skin external preparations having a high occlusive property of 50% or more (test examples 1 to 11) can give a firm feeling and improve fine wrinkles not only after one month but also after one night of application. On the other hand, test examples 12 and 13 having an occlusion property of less than 50% did not bring about the fine grain improving effect even after one month of application.

2.Study on improvement of usability

When only an oily component is used, the spreadability is poor, stickiness is caused, and the usability is very poor, and therefore, various powders are blended to improve the usability without lowering the occlusion of the oily skin external preparation.

The oily skin external preparations were prepared by blending various powders with an oil component using the formulations shown in table 2, and the occlusive properties and the fine wrinkle-improving effect of each sample were evaluated by the methods described above, and the usability was evaluated by the following methods.

Evaluation of usability

Evaluation of the usability (stickiness, good degree of extensibility, floating powder) sensory tests were carried out by professional panelist review. Each sample was used by 10 female panelists and evaluated on the following evaluation criteria:

(stickiness)

A: the panelists who responded no stickiness were 7 or more

B: the panelists responded without stickiness and were 3 to 6

C: the panelists who responded no stickiness were 2 or less

(ductility)

A: the number of the panelists who responded well was 7 or more

B: the panelists who responded well with good extensibility were 3 to 6

C: the panelists who responded well with good extensibility were 2 or less

(Floating powder)

A: the panelists answered no pollen and were 7 or more

B: the panelists responded without the pollen from 3 to 6

C: the panelists who responded to the non-pollen were 2 or less

The results are shown in Table 2:

in examples 1 to 9, the performance of stickiness and poor ductility was significantly improved without impairing the occlusion property (and hence the fine grain improving effect) by blending the powder in an amount of 50% by mass or less. In particular, in examples 1 to 8 in which spherical powders were blended, the degree of lubrication in coating and spreading was good, and in examples 1 to 5 in which the blended powders were elastic spherical powders, no floating powder was present, and the usability was further excellent. In example 5 in which a volatile liquid oil component was blended, the ductility was further improved.

In addition, although not shown, in example 3 in which the elastic spherical powder and the spherical silica powder were blended, the stability was good even when stored at a high temperature (50 ℃ C.) for 1 month. The external preparation of example 2 containing only the elastic spherical powder was stable in the horizontal state in which the oily skin external preparation of the present invention was stored in normal conditions, but some oil slick was observed when the external preparation was stored in the vertical state at a high temperature (50 ℃ C.) for 1 month. On the other hand, in example 3 in which elastic spheroids were blended and spherical silica was blended, no floating oil was observed even when the composition was stored at a high temperature (50 ℃) in a vertical state for 1 month. The oily external preparation for skin of the present invention is not usually stored in the vertical position, and therefore, stability is not a problem if it is placed in the horizontal position, but if it is considered to be an emergency, it is more preferable to have storage stability even in the vertical position.

Further, when a powder having a refractive index of 1.6 or more or a powder coated with a powder having a refractive index of 1.6 or more is blended (examples 2 to 5), unevenness of the skin is not easily seen, and the effect of concealing color unevenness is excellent.

On the other hand, in comparative examples 1 and 2 containing no powder and comparative example 3 containing less than 5 mass% of powder, stickiness occurred and the ductility was very poor. In addition, comparative example 4 containing more than 50 mass% of the powder had low occlusion property and failed to provide the effect of improving fine wrinkles.

Claims (14)

1. A fine wrinkles-improving agent comprising an oily external skin preparation having an occlusive property of 50% or more, wherein the oily external skin preparation contains 70 to 85 mass% of an oil component containing 30 mass% or more of a solid or semi-solid nonpolar hydrocarbon oil selected from vaseline, microcrystalline wax and a combination thereof, and 15 to 30 mass% of a powder containing an elastomeric spherical silicone powder.

2. The agent for improving fine wrinkles as claimed in claim 1, wherein said elastic spherical silicone-based powder contains 1 or more kinds of powder selected from the group consisting of silicone rubber powder, silicone resin-coated silicone rubber powder, and zinc oxide-coated silicone resin-coated silicone rubber powder.

3. The wrinkle-improving agent as described in claim 1, wherein said powder further contains a spherical silica powder.

4. The wrinkle-improving agent as described in claim 2, wherein said powder further contains a spherical silica powder.

5. The agent for improving fine wrinkles according to any one of claims 1 to 4, wherein the oil component contains a liquid nonpolar hydrocarbon oil.

6. The wrinkle-improving agent according to any one of claims 1 to 4, wherein the oil component contains a volatile oil component.

7. The wrinkle-improving agent according to claim 5, wherein the oil component contains a volatile oil component.

8. A cosmetic method for improving fine wrinkles, which comprises applying an oily external skin preparation having an occlusive property of 50% or more to the skin, wherein the oily external skin preparation contains 70 to 85% by mass of an oil component containing 30% by mass or more of a solid or semi-solid nonpolar hydrocarbon oil selected from vaseline, microcrystalline wax and a combination thereof, and 15 to 30% by mass of a powder containing an elastomeric spherical silicone powder, to the total amount of the oil component.

9. The cosmetic method according to claim 8, wherein the elastic spherical silicone-based powder contains 1 or more kinds of powders selected from the group consisting of a silicone rubber powder, a silicone resin-coated silicone rubber powder, and a zinc oxide-coated silicone resin-coated silicone rubber powder.

10. Cosmetic method according to claim 8, characterized in that said powder also contains a spherical silica powder.

11. Cosmetic method according to claim 9, characterized in that said powder also contains a spherical silica powder.

12. The cosmetic method according to any one of claims 8 to 11, wherein the oil component contains a liquid nonpolar hydrocarbon oil.

13. Cosmetic method according to any one of claims 8 to 11, characterized in that the oil component comprises a volatile oil component.

14. Cosmetic method according to claim 12, characterized in that said oil component comprises a volatile oil component.