JP2021107343A - Composition for skin external application - Google Patents

Abstract

To provide a composition for skin external application that can improve wrinkles, can apply a coat of uniformly thickness, and prevents peeling of the coat and whitening with time.SOLUTION: This composition for skin external application contains following components: 4-30 mass% of a polymer (A) which has a silicone structure and in which a deformation rate as measured by a predetermined method (1) is 0.3-1, and in a bending resistance test by a cylindrical mandrel method, performed by a predetermined method (2), a minimum diameter of a cylindrical mandrel with which cracks do not occur in a film of the polymer is 2-25 mm; volatile oil (B) which has a volatilization rate of at least 14% after drying for 30 minutes at 40°C under 1 atm and an R.H. of 60%; and a dimethicone cross-linked elastomer (C).SELECTED DRAWING: None

Description

The present invention relates to a skin external preparation composition.

With aging, human skin becomes more wrinkled. This is part of the skin aging phenomenon and is subject to multiple factors such as changes in skin tissue and the effects of exposure to UV light.
Conventionally, skin care products for making wrinkles on the skin inconspicuous have been studied, but the improvement effect is extremely low, and the satisfaction level of women suffering from wrinkles has not been obtained.
On the other hand, cosmetics containing a film-forming polymer are known for the purpose of improving the uniformity of the cosmetic film and the retention of the cosmetic film. For example, Patent Document 1 describes that a cosmetic containing a film-forming polymer in which a predetermined functional group is introduced into the skeleton of a polycycloolefin polymer has a good cosmetic feel and feel.

Japanese Unexamined Patent Publication No. 2012-17317

However, cosmetics containing a film-forming polymer do not have a sufficient effect of improving wrinkles, and it is difficult to apply the coating film uniformly and thickly. There was also the issue of not having it.

By using a specific film-forming polymer in combination with a dimethicone crosslinked elastomer, the present inventors can maintain high shrinkage, improve wrinkles, and apply a uniform and thick coating film. We have found that a uniform and clean finish can be obtained, and a skin external preparation composition in which peeling and whitening of the coating film are suppressed over time can be obtained, and the present invention has been completed.

In the present invention, the following components (A), (B) and (C):
(A) A polymer having a silicone structure, the deformation ratio measured by the following method (1) is 0.3 or more and 1 or less, and the bending resistance by the cylindrical mandrel method performed by the following method (2). In the sex test, 4 to 30% by mass of the polymer having a minimum diameter of 2 mm or more and 25 mm or less of a cylindrical mandrel that does not cause cracks in the polymer film.
Method (1): A 10% by mass hexamethyldisiloxane solution of the polymer is prepared. 0.005 g of the solution was applied to one side of a polyethylene sheet having a width of 20 mm, a length of 100 mm, and a thickness of 0.03 mm in a range of 20 mm in width and 50 mm in length from one end of a short side in the length direction. Dry for 10 minutes in a constant temperature bath set at ° C. The length of the polyethylene sheet of the portion coated with the solution is L1, the length of the polyethylene sheet of the portion deformed by shrinkage after drying is L2, and the value of L2 / L1 is defined as the deformation ratio.
Method (2): A 30% by mass hexamethyldisiloxane solution of the polymer is prepared. The solution is applied to a polyethylene terephthalate film having a width of 50 mm, a length of 100 mm and a thickness of 0.1 mm using a 200 μm applicator, and dried in a constant temperature bath set at 40 ° C. for 120 minutes to prepare a test piece. The test piece is used to perform a bending resistance test in accordance with the cylindrical mandrel method specified in JIS K5600-5: 1: 1999, and the minimum diameter of the cylindrical mandrel at which the polymer film on the test piece does not crack. Ask for.
(B) At 1 atm, 40 ° C., 60% R. H. Volatile oil with a volatility of 14% or more after drying for 30 minutes.
(C) The present invention relates to a skin external preparation composition containing a dimethicone crosslinked elastomer.

The external preparation composition for skin of the present invention can improve wrinkles and can uniformly and thickly apply a coating film, obtain a fine, uniform and clean finish, and prevent the coating film from peeling or whitening over time. It is suppressed.

It is explanatory drawing of the evaluation method of the deformation ratio (L2 / L1) of a polymer by the method (1). It is a figure which shows the form in which each skin external preparation composition is applied at the time of evaluating the wrinkle improvement effect in an Example.

<Ingredient (A)>
The component (A) used in the present invention is a polymer having a silicone structure, the deformation ratio measured by the method (1) is 0.3 or more and 1 or less, and the component (A) is carried out by the method (2). In the bending resistance test by the cylindrical mandrel method, the minimum diameter of the cylindrical mandrel at which cracks do not occur in the polymer film is 2 mm or more and 25 mm or less.
By satisfying the above-mentioned deformation ratio measured by the method (1), the component (A) is applied, for example, by applying a composition containing the polymer which is the component (A) to the skin around the wrinkles, and then applying the composition. When the composition is dried, the skin surface in close contact with the film shrinks as the film containing the polymer shrinks. By this action, the skin of the wrinkled portion is stretched, so that the wrinkles can be made inconspicuous.

The method for evaluating the deformation ratio (L2 / L1) of the component (A) by the method (1) will be described with reference to FIG. First, a 10% by mass hexamethyldisiloxane solution of the component (A) used in the composition is prepared. 0.005 g of this solution is applied to one side of the polyethylene sheet 1 having a width (W) of 20 mm × a length (L0) of 100 mm × a thickness of 0.03 mm as shown in FIG. It is applied to a range of 20 mm in width × 50 mm in length (part 2 shown in FIG. 1 (a)) in the direction from the beginning to the length, and dried in a constant temperature bath set at 40 ° C. for 10 minutes. FIG. 1B is a schematic view of a polyethylene sheet to which the solution-coated polyethylene sheet 1 is dried and then deformed (curled) by shrinkage of a polymer whose part is a component (A).
In the dried polyethylene sheet (FIG. 1 (b)), the length of the polyethylene sheet in the portion coated with the solution is L1 (50 mm), and the length of the polyethylene sheet deformed by shrinkage after drying is L2. L1 is calculated and this value is used as the deformation ratio. L2 is the average value of the values measured on the two long sides of the polyethylene sheet 1. The larger the value of L2 / L1, the larger the amount of shrinkage of the polymer due to drying, and the upper limit of L2 / L1 is 1.

From the viewpoint of smoothing out wrinkles on the skin and making them inconspicuous, the deformation ratio L2 / L1 of the component (A) evaluated by the method (1) is 0.3 or more, preferably 0.5 or more, more preferably 0.5 or more. It is 0.6 or more, more preferably 0.7 or more, still more preferably 0.8 or more, still more preferably 0.85 or more, still more preferably 0.9 or more, still more preferably 0.95 or more. , The upper limit is 1.
Specifically, the deformation ratio can be evaluated by the method described in Examples.

Further, the component (A) has excellent bending resistance, and in the bending resistance test by the cylindrical mandrel method performed by the method (2), the cylindrical mandrel in which the polymer film of the component (A) does not crack. The minimum diameter is 2 mm or more and 25 mm or less. As a result, the film formed by the composition containing the component (A) is less likely to crack and is more likely to shrink while following the skin shape.
The smaller the minimum diameter of the cylindrical mandrel, the better the bending resistance. The minimum diameter is 25 mm or less, preferably 20 mm or less, more preferably 12 mm or less, still more preferably 8 mm or less, from the viewpoint of obtaining sufficient adhesion between the film and the skin surface when the film containing the polymer shrinks. It is even more preferably 6 mm or less, and even more preferably 5 mm or less. On the other hand, from the viewpoint of imparting sufficient strength and shape control effect to smooth out wrinkles on the skin and make them inconspicuous, the minimum diameter of the cylindrical mandrel at which cracks do not occur is 2 mm or more, preferably 3 mm or more. The specific range of the minimum diameter of the cylindrical mandrel is 2-25 mm, preferably 2-20 mm, more preferably 2-12 mm, even more preferably 2-8 mm, even more preferably 3-6 mm, even more preferably 3. It is ~ 5 mm.
The bending resistance can be evaluated by using the type 1 bending test apparatus specified in JIS K5600-5-1: 1999, specifically by the method described in Examples.

Further, the ratio of the deformation ratio of the component (A) to the minimum diameter (mm) of the mandrel obtained by the method (2) obtained by the method (1) [(deformation ratio) / (minimum diameter of the mandrel)]. Is preferably 0.01 or more, more preferably 0.02 or more, further preferably 0.10 or more, still more preferably 0.15 or more, and smoothes the wrinkles of the skin from the viewpoint of the effect of improving skin wrinkles. From the viewpoint of imparting sufficient strength and shape control effect to make it inconspicuous, it is preferably 0.5 or less, more preferably 0.4 or less. The specific range of the ratio is preferably 0.01 to 0.5, more preferably 0.02 to 0.5, still more preferably 0.10 to 0.5, still more preferably 0.15 to 0. 5, and even more preferably 0.15 to 0.4.

In the present invention, the "silicone structure" refers to a structure represented by the following general formula (I).

In the general formula (I), R ¹ is independently a hydrocarbon group having 1 or more carbon atoms and 12 or less carbon atoms, and p is an integer of 1 or more. ^{R 1} is preferably carbon number 1 from the viewpoint of obtaining a sufficient wrinkle improving effect (hereinafter, also referred to as “skin wrinkle improving effect”) and versatility by stretching and making the wrinkles of the skin inconspicuous when applied. An alkyl group having 12 or more carbon atoms or an aryl group having 6 or more carbon atoms and 12 or less carbon atoms, more preferably an alkyl group having 1 or more and 12 or less carbon atoms or a phenyl group, still more preferably an alkyl group having 1 or more carbon atoms and 3 or less carbon atoms. It is preferably a methyl group.

The polymer as the component (A) may have a silicone structure as long as it has a silicone structure, and may be a polymer having only a silicone structure. Is preferable.
In the case of a polymer having a partially silicone structure, the silicone structure may be present in either the main chain or the side chain in the polymer, and is present in the side chain from the viewpoint of making the polymer having the predetermined characteristics. It is preferable to do so.
When the silicone structure is present in the polymer main chain, the bonding form thereof is not particularly limited. For example, the silicone structure may be present at the end of the polymer main chain, or the silicone structure is block-shaped in the polymer main chain. Alternatively, it may be a randomly bonded copolymer polymer. Further, a polymer graft-modified with a compound having a silicone structure can also be used.

As the component (A) used in the present invention, a silicone-modified polymer is preferable, and specific examples thereof include a silicone-modified polymer containing a norbornan structure such as silicone-modified polynorbornene; silicone-modified purulan; trialkylsiloxysilicic acid, and fluorine-modified alkyl. Silicone structure-containing silicic acid compounds such as siloxysilicic acid and phenyl-modified alkylsiloxysilicic acid; silicone dendrimers and the like can be mentioned.

(Silicon modified polymer containing norbornane structure)
In the present invention, the norbornane structure means a structure represented by the following formula. The norbornane structure-containing silicone-modified polymer may be any silicone-modified polymer having a structure represented by the formula at any site in the polymer.

Examples of the norbornane structure-containing silicone-modified polymer include polymers having a repeating unit represented by the following general formula (1) or (2).

In the formula, R ² is an alkyl group having 1 to 12 carbon atoms independently, and X is a group represented by the following formula (i). a is an integer of 1 or more and 3 or less, and b is an integer of 0 or more and 2 or less.

In the formula, R ¹ is the same as above, and c is an integer of 1 or more and 5 or less.

In the formula, R ¹ , R ² and b are the same as described above, and d is an integer of 2 or more and 5 or less.

In the general formula (1), R ² is an alkyl group having 1 or more and 12 or less carbon atoms independently, and is a methyl group, an ethyl group, or an n-propyl group from the viewpoint of skin wrinkle improving effect and versatility. , Butyl group, or pentyl group is preferable, and methyl group is more preferable.
X is a group represented by the above formula (i), and in the formula (i), R ¹ is an independently hydrocarbon group having 1 or more and 12 or less carbon atoms. From the viewpoint of skin wrinkle improving effect and versatility, R ¹ is preferably an alkyl group having 1 to 12 carbon atoms or an aryl group having 6 to 12 carbon atoms, and more preferably 1 to 12 carbon atoms. Alkyl group or phenyl group, more preferably an alkyl group having 1 or more and 3 or less carbon atoms, and even more preferably a methyl group. c is an integer of 1 or more and 5 or less, and c = 1 is preferable from the viewpoint of versatility. That is, X is preferably a trimethylsiloxy group.
a is an integer of 1 or more and 3 or less, and may be, for example, a polymer in which a repeating unit of a = 2 and a repeating unit of a = 3 are mixed and exist. From the viewpoint of versatility, a is preferably 3. b is an integer of 0 or more and 2 or less, and from the same viewpoint, 0, 1 or a combination thereof is preferable, and 0 is more preferable.

In the general formula (2), R ¹ , R ² and b are the same as described above. d is an integer of 2 or more and 5 or less, and d = 2 is preferable from the viewpoint of versatility. From the same viewpoint, the cyclic silicone structure in the general formula (2) ^{preferably has R 1} and R ² as a methyl group and d as 2 or 3. That is, the cyclic silicone structure in the general formula (2) is preferably a structure represented by the following formula (4) or (5).

From the viewpoint of the effect of improving skin wrinkles, the ratio of the repeating units represented by the general formula (1) or (2) in the norbornane structure-containing silicone-modified polymer is preferably the total number of repeating units in the polymer. It is 10% or more, more preferably 30% or more, still more preferably 50% or more. The upper limit is 100%, preferably 95% or less, more preferably 90% or less, still more preferably 70% or less. The specific range of the number of repeating units represented by the general formula (1) or (2) in the norbornane structure-containing silicone-modified polymer is preferably 10 to 100% of the total number of repeating units in the polymer. It is preferably 10 to 95%, more preferably 30 to 90%, and even more preferably 50 to 70%.

The norbornane structure-containing silicone-modified polymer may have a repeating unit represented by the following general formula (3) in addition to the repeating unit represented by the general formula (1) or (2).

In the formula, R ^{3 to} R ⁶ are independently hydrogen atom, halogen atom, alkyl group, alkenyl group, cycloalkyl group, aryl group, alkoxy group, aryloxy group and halogenated carbide having 1 or more and 10 or less carbon atoms. It is a substituent selected from a hydrogen group, or an oxetanyl group, an alkoxycarbonyl group, a polyoxyalkylene group, a polyglyceryl group, or an alkoxysilyl group. The ^{two groups selected from R 3 to} R ⁶ may be bonded to each other to form an alicyclic structure, an aromatic ring structure, a carboimide group or an acid anhydride group. b is the same as described above.

The ratio of the repeating units represented by the above general formula (3) in the norbornane structure-containing silicone-modified polymer is preferably 90% or less of the total number of repeating units in the polymer from the viewpoint of the effect of improving skin wrinkles. It is more preferably 70% or less, still more preferably 50% or less. When the repeating unit represented by the general formula (3) is included, the ratio thereof is preferably 5% or more, more preferably 10% or more, still more preferably 30% of the total number of repeating units in the polymer. That is all. The specific range of the number of repeating units represented by the general formula (3) in the norbornane structure-containing silicone-modified polymer is preferably 5 to 90%, more preferably 10 to 10% of the total number of repeating units in the polymer. It is 70%, more preferably 30 to 50%.
The ratio of the repeating units represented by the above general formulas (1) to (3) in the norbornane structure-containing silicone-modified polymer ^{can be determined by 1 1} H-NMR measurement.

As the norbornane structure-containing silicone-modified polymer, silicone-modified polynorbornene is preferable, and silicone-modified polynorbornene represented by the following formula (6) is more preferable.

In the formula, e and f are the number of repeating units, and each is an integer of 1 or more independently.
From the viewpoint of the effect of improving skin wrinkles, the ratio of e and f in the general formula (6) is preferably e / f = 20/80 to 90/10 (mol / mol), more preferably 30/70 to 80. / 20 (mol / mol), more preferably 50/50 to 70/30 (mol / mol).

The number average molecular weight Mn of the norbornane structure-containing silicone-modified polymer is preferably 50,000 or more, more preferably 100,000 or more, still more preferably 100,000 or more, from the viewpoint of achieving both shrinkage and bending resistance and the effect of improving skin wrinkles. It is 200,000 or more, preferably 2 million or less, more preferably 1.5 million or less, still more preferably 800,000 or less, still more preferably 600,000 or less. The specific range of the number average molecular weight Mn of the norbornane structure-containing silicone-modified polymer is preferably 50,000 to 2 million, more preferably 100,000 to 1.5 million, still more preferably 200,000 to 800,000, still more preferably 200,000 to 200,000. It is 600,000.
The number average molecular weight Mn of the polymer can be measured by a gel permeation chromatography (GPC) method using polystyrene as a standard substance, and specifically, can be measured by the method described in Examples.

The norbornane structure-containing silicone-modified polymer is obtained, for example, by addition-polymerizing a silicone-modified cyclic olefin monomer containing a norbornane structure or capable of forming a norbornane structure by a known method.
For example, in the case of a norbornane structure-containing silicone-modified polymer having a repeating unit represented by the general formula (1) or (2), addition polymerization of a cyclic olefin monomer represented by the following general formula (1a) or (2a) is carried out. Can be obtained. Further, the cyclic olefin monomer represented by the following general formula (3a) may be copolymerized.

In the formula, R ¹ is an alkyl group having 1 to 12 carbon atoms independently, and X is a group represented by the following formula (i). a is an integer of 1 or more and 3 or less, and b is an integer of 0 or more and 2 or less.

In the formula, R ² is an independently hydrocarbon group having 1 or more and 12 or less carbon atoms, and c is an integer of 1 or more and 5 or less.

In the formula, R ¹ , R ² and b are the same as described above, and d is an integer of 2 or more and 5 or less.

In the formula, R ^{3 to} R ⁶ are independently hydrogen atom, halogen atom, alkyl group, alkenyl group, cycloalkyl group, aryl group, alkoxy group, aryloxy group and halogenated carbide having 1 or more and 10 or less carbon atoms. It is a substituent selected from a hydrogen group, or an oxetanyl group, an alkoxycarbonyl group, a polyoxyalkylene group, a polyglyceryl group, or an alkoxysilyl group. The ^{two groups selected from R 3 to} R ⁶ may be bonded to each other to form an alicyclic structure, an aromatic ring structure, a carboimide group or an acid anhydride group. b is the same as described above.

When the cyclic olefin monomer represented by the general formula (3a) is copolymerized, the amount used is preferably 90 mol%, with 100 mol% of all the monomers used for the polymerization from the viewpoint of the effect of improving wrinkles on the skin. Below, it is more preferably 70 mol% or less, further preferably 50 mol% or less, and preferably 5 mol% or more, more preferably 10 mol% or more, still more preferably 30 mol% or more.

The silicone-modified polynorbornene represented by the formula (6) can be obtained by addition polymerization of tris (trimethylsiloxy) silylnorbornene represented by the following formula (6a) and norbornene.

From the viewpoint of improving skin wrinkles, the copolymerization ratio of tris (trimethylsiloxy) silylnorbornene and norbornene is preferably 20/80 to 90/10 (mol / mol), more preferably 30/70 to 80/. It is 20 (mol / mol), more preferably 50/50 to 70/30 (mol / mol).

The repeating units represented by the general formulas (1) to (3) and the formula (6) all represent 2,3-addition structural units of the cyclic olefin monomer which is the raw material monomer. It may contain a 2,7-additional structural unit formed by addition polymerization of the cyclic olefin monomer.

As the norbornene structure-containing silicone-modified polymer, a norbornene / tris (trimethylsiloxy) silylnorbornene) copolymer is preferable, and the INCI name (International Nomenclature Ingredient Dictionary and Handbook, 16th Edition, Vol. 2, 2016, p.2274): NORBORN / TRIS (TRIMETHYLSILOXY) SILYLNORBORNENE COPOLYMER is a compound represented by this.
Examples of commercially available norbornane structure-containing silicone-modified polymers include "NBN-30-ID" (a solution of norbornene / tris (trimethylsiloxy) silylnorbornene) copolymer in isododecane) manufactured by Shin-Etsu Chemical Co., Ltd.

(Silicone modified pullulan)
Examples of the silicone-modified pullulan include pullulan having a silicone structure in the side chain. Specifically, from the viewpoint of skin wrinkle improving effect and versatility, at least a part of hydrogen atoms of OH groups in pullulan is present. Silicone-modified pullulan substituted with a group represented by the following general formula (7) is preferable.

In the formula, Z ¹ is a single bond or divalent organic group. R ² , X, and a are the same as described above, and from the same viewpoint, X is preferably a trimethylsiloxy group, and a is preferably 3.

In the general formula (7), from the same viewpoint, Z ¹ is preferably a divalent organic group, more preferably a divalent group represented by the following general formula (8) or (9), and the following general. A divalent group represented by the formula (9) is more preferable.

In the formula, R ¹¹ is an alkylene group having 1 or more and 10 or less carbon atoms, and examples thereof include a methylene group, an ethylene group, a trimethylene group, a propylene group and a butylene group. From the same viewpoint, among these, an ethylene group, a trimethylene group and a propylene group are preferable, and a trimethylene group or a propylene group is more preferable.

Commercially available silicone-modified pullulan includes "TSPL-30-ID" (isododecane solution of tri (trimethylsiloxy) silylpropylcarbamide pullulan) and "TSPL-30-D5" (tri (trimethylsiloxy) silyl) manufactured by Shin-Etsu Chemical Co., Ltd. Cyclopentasiloxane solution of pullulan propylcarbamide) and the like.

(Silicic acid structure-containing silicic acid compound)
Examples of the silicone structure-containing silicic acid compound used in the present invention include silicate compounds having a silicone structure at the end, and examples thereof include trialkylsiloxysilicic acid, fluorine-modified alkylsiloxysilicic acid, and phenyl-modified alkylsiloxysilicic acid. Be done.
The alkyl group in trialkylsiloxysilicic acid preferably has 1 or more and 10 or less carbon atoms, more preferably 1 or more and 4 or less carbon atoms, and further preferably a methyl group, from the viewpoint of the effect of improving skin wrinkles and versatility. Is. Specific examples of trialkylsiloxysilicic acid include trimethylsiloxysilicic acid.
Examples of the fluorine-modified alkylsiloxysilicic acid include compounds in which at least a part of the hydrogen atoms of the alkyl group in the trialkylsiloxysilicic acid are replaced with fluorine atoms. Specific examples thereof include trifluoropropyldimethylsiloxysilicic acid, trifluoropropyldimethyl / trimethylsiloxysilicic acid and the like.
Examples of the phenyl-modified alkylsiloxysilicic acid include phenylpropyldimethylsiloxysilicic acid and phenylpropyldimethyl / trimethylsiloxysilicic acid.

Among the silicone structure-containing silicic acid compounds, one or more selected from the group consisting of trialkylsiloxysilicic acid and fluorine-modified alkylsiloxysilicic acid is preferable from the viewpoint of the effect of improving skin wrinkles.

Examples of commercially available silicone structure-containing silicic acid compounds include "KF-7312J", "KF-7312K", "KF-7312T", "KF-7312L", "X-21-5249", and "X" manufactured by Shin-Etsu Chemical Industry Co., Ltd. -21-5250 "," KF-9021 "," X-21-5595 "," X-21-5616 "," KF-9021L "," X-21-5249L "," X-21-5250L ", etc. Trimethylsiloxysilicic acid (solution), "XS66-B8226" (trifluoropropyldimethyl / trimethylsiloxysilicic acid cyclopentasiloxane solution) manufactured by Momentive Performance Materials Japan LLC, "XS66-B8636" (trifluoro) A dimethicone solution of propyldimethyl / trimethylsiloxysilicic acid), "SilShine151" (phenylpropyldimethylsiloxysilicic acid) and the like can be used.

(Silicone dendrimer)
Examples of the silicone dendrimer include a vinyl polymer having a siloxane dendrimer structure in the side chain. The siloxane dendrimer structure is preferably a group represented by the following general formula (10) from the viewpoint of skin wrinkle improving effect and versatility.

In the formula, R ¹ is the same as above. Z ² is a single bond or divalent organic group. X ¹ is a group represented by the following general formula (11) when i = 1, and i is an integer of 1 or more and 10 or less indicating the hierarchy of the group.

In the formula, R ¹ is the same as described above, and R ¹² is an alkyl group having 1 or more carbon atoms and 10 or less carbon atoms. Z ³ is an alkylene group having 2 or more and 10 or less carbon atoms. X ^{i + 1} is a hydrogen atom, an alkyl group having 1 or more and 10 or less carbon atoms, an aryl group or a group represented by the general formula (11), and a ⁱ is an integer of 0 or more and 3 or less.

In the general formula (10), Z ² is a single bond or a divalent organic group, preferably a divalent organic group from the viewpoint of versatility, and the following general formulas (12), (13) or ( The divalent group represented by 14) is more preferable.

In the formula, R ¹³ is an alkylene group having 1 or more and 10 or less carbon atoms, and examples thereof include a methylene group, an ethylene group, a trimethylene group, a propylene group and a butylene group. From the viewpoint of versatility, an ethylene group, a trimethylene group, or a trimethylene group or A propylene group is preferred. R ¹⁴ is an alkyl group having 1 to 10 carbon atoms, and a methyl group, an ethyl group, a propyl group, and a butyl group are exemplified, and a methyl group is preferable from the same viewpoint. R ¹⁵ is an alkylene group having 1 or more and 10 or less carbon atoms, and examples thereof include a methylene group, an ethylene group, a trimethylene group, a propylene group and a butylene group, and an ethylene group is preferable from the same viewpoint. q is an integer of 0 or more and 4 or less, and r is 0 or 1.

Examples of the vinyl-based polymer having the above-mentioned siloxane dendrimer structure in the side chain (hereinafter, also simply referred to as “vinyl-based polymer”) include a polymer having a repeating unit derived from a monomer represented by the following general formula (15). Be done.

In the formula, R ¹ and X ¹ are the same as described above. Y is a group containing a vinyl bond, for example, a vinyl group, a 2-acryloyloxyethyl group, a 3-acryloyloxypropyl group, a 2-methacryloyloxyethyl group, a 3-methacryloyloxypropyl group, a 4-vinylphenyl group, 3 -Vinylphenyl group, 4- (2-propenyl) phenyl group, 3- (2-propenyl) phenyl group, 2- (4-vinylphenyl) ethyl group, 2- (3-vinylphenyl) ethyl group, allyl group, Examples include 5-hexenyl groups. Of these, from the viewpoint of versatility, a (meth) acryloyl group or a vinyl group is preferable, and a (meth) acryloyl group is more preferable.

The vinyl-based polymer may further contain a repeating unit derived from a vinyl-based monomer other than the monomer represented by the general formula (15). The vinyl-based monomer is a monomer having a group containing a vinyl bond and other than the monomer represented by the general formula (15), and is, for example, (meth) acrylic acid or alkyl (meth). ) Acrylate, hydroxyalkyl (meth) acrylate, aromatic ring-containing (meth) acrylate, fatty acid vinyl ester, (meth) acrylamide, styrene or a derivative thereof, etc., and one or more of these can be used. Among these, (meth) acrylic monomers such as (meth) acrylic acid, alkyl (meth) acrylate, hydroxyalkyl (meth) acrylate, and aromatic ring-containing (meth) acrylate are preferable from the viewpoint of versatility.

The content of the repeating unit derived from the monomer represented by the general formula (15) in the vinyl polymer is preferable with respect to all the repeating units in the vinyl polymer from the viewpoint of the effect of improving wrinkles on the skin. Is 0.1% by mass or more, more preferably 10% by mass or more, still more preferably 20% by mass or more. The upper limit is 100% by mass.

The vinyl polymer is more preferably an acrylic polymer. That is, a preferable silicone dendrimer is an acrylic polymer having a siloxane dendrimer structure in the side chain (hereinafter, also referred to as "acrylic silicone dendrimer"). The acrylic silicone dendrimer is a polymer having a repeating unit derived from a monomer in which Y is a (meth) acroyl group in the general formula (15), and is a polymer other than the monomer represented by the general formula (15). Meta) It may further contain a repeating unit derived from an acrylic monomer.

Commercially available silicone dendrimers include "FA 4001 CM Silicone Acrylate" (cyclopentasiloxane solution of acrylate-polytrimethylsiloxymethacrylate copolymer) and "FA 4002 ID Silicone Acrylate" (acrylate-polytrimethylsiloxy) manufactured by Toray Dow Corning. Acrylic silicone dendrimers such as isododecane solution of methacrylate copolymer) can be mentioned.

Among the above polymers, the component (A) includes silicone-modified polynorbornene, silicone-modified purulan, trimethylsiloxysilicic acid, trifluoropropyldimethyl / trimethylsiloxysilicic acid, and acrylic silicone dendrimer from the viewpoint of improving skin wrinkles. One or more selected from the group consisting of, more preferably one or more selected from the group consisting of silicone-modified polynorbornene, silicone-modified purulan, trimethylsiloxysilicic acid, and trifluoropropyldimethyl / trimethylsiloxysilicic acid, more preferably skin. From the viewpoint of wrinkle improving effect and bending resistance, one or more selected from the group consisting of silicone-modified polynorbornene and silicone-modified purulan is more preferable, and silicone-modified polynorbornen is even more preferable.

The component (A) can be used alone or in combination of two or more, and the solid content is 4% by mass or more in the total composition from the viewpoint of the effect of improving wrinkles on the skin, and is 5% by mass. % Or more is preferable, 6% by mass or more is more preferable, 8% by mass or more is further preferable, 30% by mass or less, 25% by mass or less is preferable, 20% by mass or less is more preferable, and 18% by mass or less is further preferable. .. The content of the component (A) is 4 to 30% by mass, preferably 5 to 25% by mass, more preferably 6 to 20% by mass, and even more preferably 8 to 18% by mass in the total composition.

<Ingredient (B)>
The component (B) used in the present invention is 60% R. at 40 ° C. under 1 atm. H. It is a volatile oil having a volatility of 14% or more after being dried for 30 minutes. When the component (B) is contained, the drying rate of the composition containing the component (A) is improved, so that the contraction of the component (A) in the drying process is accelerated, and the wrinkles on the skin are smoothed and made inconspicuous. The effect is improved.
From the viewpoint of obtaining the above effect, the component (B) contains 60% R.I. H. The volatilization rate after drying for 30 minutes is preferably 18% or more, more preferably 25% or more, further preferably 30% or more, still more preferably 45% or more, still more preferably 65% or more, still more preferably. It is 80% or more, more preferably 95% or more. The upper limit is 100%.
The volatility of the component (B) was 60% R.I. H. Under circumstances, dried and allowed to stand for 30 minutes at 40 ° C., the sample mass before drying W ₀ (g), and the sample mass after drying W ₁ and _{(g), {(W 0} -W ₁ ) / W ₀ } × 100. The larger this value is, the faster the volatilization rate is, and the easier it is to dry.
Two or more kinds of volatile oils may be used as the component (B).
Specifically, the volatility can be measured by the method described in Examples.

Examples of the component (B) include oils selected from hydrocarbon oils and silicone oils and having a volatility in the above range from the viewpoint of enhancing the effect of improving skin wrinkles. Among these, one or more selected from the group consisting of isododecane (volatile rate 33%), hexamethyldisiloxane (volatile rate 100%), methyltrimethicone, and dimethylpolysiloxane having a kinematic viscosity at 25 ° C. of 2 cSt or less. Ispreferably, one or more selected from isododecane, hexamethyldisiloxane, methyltrimethicone and octamethyldimethylpolysiloxane are more preferable. The kinematic viscosity can be measured using, for example, an Ubbelohde viscometer.
From the viewpoint of enhancing the effect of improving skin wrinkles, the component (B) is more preferably selected from the group consisting of isododecane, hexamethyldisiloxane, and dimethylpolysiloxane having a kinematic viscosity at 25 ° C. of 1.5 cSt or less1 More than one species, more preferably one or more selected from the group consisting of hexamethyldisiloxane and dimethylpolysiloxane having a kinematic viscosity at 25 ° C. of 1 cSt or less, and even more preferably hexamethyldisiloxane. be.

As commercially available products of hexamethyldisiloxane and dimethylpolysiloxane having a kinematic viscosity at 25 ° C. of 2 cSt or less, "KF-96L-0.65cs" (hexamethyldisiloxane) manufactured by Shin-Etsu Chemical Co., Ltd., "TMF1. 5 ”,“ KF-96L-1cs ”(octamethyltrisiloxane),“ KF-96L-1.5cs ”,“ KF-96L-2cs ”,“ SH200C Fluid 1cs ”manufactured by Toray Dow Corning,“ SH200C Examples include "Fluid 1.5cs", "TSF451-0.65" manufactured by Momentive Performance Materials Japan LLC, and "BELSEL DM0.65" manufactured by Asahi Kasei Wacker Silicone.

The component (B) can be used alone or in combination of two or more, and the content is preferably 1% by mass or more in the total composition from the viewpoint of enhancing the effect of improving wrinkles on the skin. Mass% or more is more preferable, 50% by mass or more is further preferable, 70% by mass or more is further preferable, 75% by mass or more is further preferable, 95% by mass or less is preferable, 94% by mass or less is more preferable, and 93% by mass is more preferable. % Or less is further preferable, 91% by mass or less is further preferable, and 87% by mass or less is even more preferable. The content of the component (B) is preferably 1 to 95% by mass, more preferably 30 to 94% by mass, and even more preferably 50 to 93% by mass in the total composition. 70 to 91% by mass is even more preferable, and 75 to 87% by mass is even more preferable.

In the present invention, the mass ratio (A) / (B) of the component (A) to the component (B) is preferably 0.05 or more, more preferably 0.06 or more, from the viewpoint of the effect of improving skin wrinkles. Preferably, 0.07 or more is further preferable, 0.1 or more is further preferable, 1 or less is more preferable, 0.7 or less is more preferable, 0.4 or less is further preferable, and 0.25 or less is further preferable. The mass ratio (A) / (B) of the component (A) to the component (B) is preferably 0.05 to 1, more preferably 0.06 to 0.7, and 0.07 to 0.4. More preferably, 0.1 to 0.25 is even more preferable.

<Component (C)>
The dimethicone crosslinked elastomer of the component (C) used in the present invention is preferably a silicone having a crosslinked structure obtained by polymerization of a monomer and a derivative thereof. For example, dimethicone, vinyldimethicone, phenylvinyldimethicone, lauryldimethicone and laurylpolydimethylsiloxy. Silicones and derivatives thereof obtained by polymerizing or copolymerizing a monomer selected from ethyldimethicone and the like are preferable.

As the component (C), polymethylsilsesquioxane, (dimethicone / vinyldimethicone) crosspolymer, (dimethicone / phenylvinyldimethicone), (dimethicone / phenylvinyldimethicone), from the viewpoint that the coating film can be applied uniformly and thickly and a uniform and beautiful finish can be obtained. ) Crosspolymer, (Vinyl dimethicone / lauryl dimethicone) crosspolymer, (Vinyl dimethicone / methicone silsesquioxane) crosspolymer, (diphenyldimethicone / vinyldiphenyldimethicone / silsesquioxane) crosspolymer, polysilicone-1 crosspolymer, (PEG-15 / lauryl dimethicone) crosspolymer, (dimethicone PEG-10 / 15) crosspolymer are more preferred, (vinyldimethicone / methicone silsesquioxane) crosspolymer, (dimethicone / vinyldimethicone) crosspolymer, (vinyldimethicone) / Lauryl dimethicone) crosspolymer, (PEG-15 / lauryl dimethicone) crosspolymer are more preferred.

The dimethicone crosslinked elastomer of the component (C) may be used as it is in a solid state, or may be uniformly mixed with water or liquid oil. From the viewpoint of imparting workability, dispersibility, and smoothness to the composition, it is preferable to use it as a dispersion liquid mixed with water or liquid oil, and from the viewpoint of good compatibility with the skin, dispersion mixed with liquid oil. It is more preferable to use it as a liquid.
The liquid oil preferably has a viscosity at 25 ° C. of 100 mPa · s or less, more preferably 50 mPa · s or less, further preferably 30 mPa · s or less, and more preferably 10 mPa · s or less, from the viewpoint of a non-greasy feel. More preferred.
Here, the viscosity is determined by the B-type viscometer (VISCOMETER TVB-10, manufactured by Toki Sangyo Co., Ltd.), rotor No. It is measured at 1, 60 rpm and 1 minute.
Further, as the liquid oil, at least one selected from silicone oil, hydrocarbon oil, and ester oil is preferable, and at least one selected from silicone oil and hydrocarbon oil is more preferable, from the viewpoint of non-greasy usability. At least one selected from dimethylpolysiloxane, decamethylcyclopentasiloxane, isododecane, and liquid paraffin is more preferable, and at least one selected from dimethylpolysiloxane, decamethylcyclopentasiloxane, and isododecane is even more preferable.

The (dimethicone / vinyldimethicone) crosspolymer may be blended as it is in the composition, or blended as an aqueous dispersion dispersed in water or an oil dispersion dispersed in oil, specifically liquid oil. As a solid state, Trefil E-506S (solid content 100% by mass) (manufactured by Toray Dow Corning Co., Ltd.) and the like can be mentioned, and as an oil dispersion, decamethylcyclopentasiloxane (KF-995) and the like can be mentioned. KSG-15 (solid content 7% by mass), KSG-16 (solid content 25% by mass), which is a mixture with dimethylpolysiloxane (KF-96A-6cs) (all manufactured by Shin-Etsu Chemical Industry Co., Ltd.), Examples thereof include Trefil E-508 (solid content 70%), which is a mixture with dimethicone, and examples of the aqueous dispersion include BY29-119 (solid content 63% by mass) and BY29-129 (solid content 63% by mass) (or more. , Toray Dow Corning) and other commercially available products can be used.

The (dimethicone / phenylvinyldimethicone) crosspolymer may be blended as it is in the composition, or may be blended as an oil dispersion dispersed in an oil, specifically a liquid oil, or as an oil dispersion. Commercially available products such as KSG-18A (solid content 15% by mass) (manufactured by Shin-Etsu Chemical Industry Co., Ltd.), which is a mixture with diphenylsiloxyphenyl trimeticone (KF-56A), can be used.

Further, the (vinyl dimethicone / lauryl dimethicone) crosspolymer may be blended as it is in the composition, or may be blended as an oil dispersion dispersed in an oil, specifically a liquid oil, or an oil dispersion. KSG-41A (solid content 25% by mass), which is a mixture with liquid paraffin, KSG-42A (solid content 20% by mass), which is a mixture with light isoparaffin (isododecan), and glyceryl tri-2-ethylhexanoate. KSG-43 (solid content 30% by mass), which is a mixture of KSG-43 (solid content 30% by mass), and KSG-44 (solid content 30% by mass) (above, manufactured by Shin-Etsu Chemical Industry Co., Ltd.), which is a mixture with squalane, can be used.
(Vinyl dimethicone / methicone silsesquioxane) As a cross polymer, KSP-100 (solid content 100% by mass), KSP-101 (solid content 100% by mass), KSP-102 (solid content 100%), as a solid state (Mass%), KSP-105 (solid content 100% by mass) (manufactured by Shin-Etsu Chemical Industry Co., Ltd.) and other commercially available products can be used.

The (dimethicone PEG-10 / 15) crosspolymer may be blended as it is in the composition, or may be blended as an oil dispersion dispersed in an oil, specifically a liquid oil, as an oil dispersion. , KSG-210 (solid content 25% by mass) (manufactured by Shin-Etsu Chemical Industry Co., Ltd.), which is a mixture with dimethylpolysiloxane (KF-96A-6cs), can be used.
The (PEG-15 / lauryl dimethicone) crosspolymer may be blended as it is in the composition, or may be blended as an oil dispersion dispersed in an oil, specifically a liquid oil, as an oil dispersion. , KSG-310 (solid content 30% by mass), which is a mixture with liquid paraffin, KSG-320 (solid content 25% by mass), which is a mixture with light isoparaffin (isododecan), and glyceryl tri-2-ethylhexanoate. Commercially available products such as KSG-330 (solid content 20% by mass) (all manufactured by Shin-Etsu Chemical Industry Co., Ltd.), which is a mixture, can be used.

The component (C) can be used alone or in combination of two or more, and the content is such that the coating film can be uniformly and thickly applied, a uniform and clean finish can be obtained, and the coating film is peeled off over time. From the viewpoint of suppressing whitening, 0.1% by mass or more is preferable, 0.2% by mass or more is more preferable, 0.4% by mass or more is further preferable, and 30% by mass or less is preferable. 20% by mass or less is more preferable, 14% by mass or less is further preferable, and 10% by mass or less is further preferable. The content of the component (C) is preferably 0.1 to 30% by mass, more preferably 0.2 to 20% by mass, further preferably 0.2 to 14% by mass, and 0.4 by mass in the total composition. 10% by mass is even more preferable.

In the present invention, the mass ratio (A) / (C) of (A) to the component (C) allows the coating film to be uniformly and thickly applied while improving wrinkles, and a uniform and clean finish can be obtained over time. From the viewpoint of suppressing peeling and whitening of the coating film in the above, 0.3 or more is preferable, 0.6 or more is more preferable, 1 or more is further preferable, 1.5 or more is further preferable, and 150 or less is more preferable. Preferably, 100 or less is more preferable, 70 or less is further preferable, and 40 or less is further preferable. The mass ratio (A) / (C) of (A) to the component (C) is preferably 0.3 to 150, more preferably 0.6 to 100, further preferably 1 to 70, and 1.5 to 70. 40 is even more preferred.

<Other ingredients>
The external preparation composition for skin of the present invention can further contain a surfactant, and anionic surfactants, cationic surfactants, nonionic surfactants, and amphoteric surfactants are preferable.
The surfactant is not limited as long as it is used for ordinary skin external preparations, but it is nonionic from the viewpoint of dissolving in volatile oil, suppressing stickiness, and suppressing peeling and whitening of the coating film over time. Surfactants are preferred.
Examples of the nonionic surfactant include sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, propylene glycol fatty acid ester, polyethylene glycol fatty acid ester, sucrose fatty acid ester, polyoxyethylene fatty acid ester, and polyoxyethylene sorbitan fatty acid ester. , Polyoxyethylene alkyl ether, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene propylene glycol fatty acid ester, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid ester , Polyoxyethylene phytostanol ether, polyoxyethylene phytosterose ether, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, alkyl glyceryl ether modified silicone, polyoxyalkylene modified silicone, polyoxyalkylene / alkyl co-modified silicone, Examples thereof include polyoxyalkylene / fluoroalkyl co-modified silicone.

Of these, from the viewpoint of enhancing the dispersion and solubility of water and water-soluble components in oil, it is preferable to contain one or more of alkyl glyceryl ether-modified silicones and polyoxyalkylene-modified silicones, and polyoxyalkylene-modified. More preferably, it contains silicone.
Examples of the polyoxyalkylene-modified silicone include SH3771M, SH3772M, SH3773M, SH3775M, SH3749, DC5200 manufactured by Toray Dow Corning, and KF-6011, KF-6012, KF-6013, KF- of Shin-Etsu Chemical Co., Ltd. Commercially available products such as 6015, KF-6016, KF6017, and KF-6004 can be used.

The nonionic surfactant preferably has an HLB value of 1 or more and 7 or less, and more preferably an HLB value of 2 or more and 6 or less, from the viewpoint of enhancing the dispersion and solubility of water and water-soluble components in oil. preferable.

Here, HLB (hydrophilic-lipophilic balance <Hydrophilic-Lypophilic Balance>) indicates the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant, and for nonionic surfactants, Griffin ( It is obtained by the formula of Griffin).
The HLB of a mixed surfactant composed of two or more types of nonionic surfactants is obtained as follows. The HLB of the mixed surfactant is a phase-added average of the HLB values of each nonionic surfactant based on the blending ratio.

Mixed HLB = Σ (HLBx × Wx) / ΣWx
HLBx indicates the HLB value of the nonionic surfactant X.
Wx is the weight (g) of the nonionic surfactant X having a value of HLBx.

The nonionic surfactant can be used alone or in combination of two or more, and the content is 30% by mass or less in the total composition from the viewpoint of dissolving in volatile oil and suppressing stickiness. Is preferable, 10% by mass or less is more preferable, 5% by mass or less is further preferable, 3% by mass or less is further preferable, and 1% by mass or less is further preferable.

In the present invention, the water content is preferably 50% by mass or less, more preferably 30% by mass or less in the total composition from the viewpoint of obtaining a non-greasy feeling while maintaining the effect of improving wrinkles on the skin. 10% by mass or less is further preferable, 5% by mass or less is further preferable, and 1% by mass or less is further preferable.

In the external preparation composition for skin of the present invention, in addition to the above-mentioned components, various commonly used components can be optionally used as long as the effects of the present invention are not impaired. Examples of these components include oily components other than the above, water-soluble polymers, antioxidants, ultraviolet absorbers, vitamins, preservatives, pH adjusters, fragrances, plant extracts, moisturizers, colorants, and cold substances. Examples include sensitizers, antiseptic agents, bactericides, skin activators and the like.

The external preparation composition for skin of the present invention can be applied to any form such as an oily composition and an emulsified composition which can be produced by a usual method. As the preparation, it can be applied as a liquid, a milky liquid, a paste, a cream, a gel, a solid, a sheet or the like.
The skin external preparation composition of the present invention can be used for cosmetics, non-pharmaceutical products, pharmaceutical applications, lotions, emulsions, creams, beauty liquids, dispersions, gels, ointments, packs, mousses, aerosols, poultices, Skin care cosmetics such as cleaning agents; UV protection cosmetics such as sunscreen emulsions and sunscreen creams; makeup bases, foundations, concealers, blushers, eye shadows, mascara, eyeliners, eyebrows, overcoats, lipsticks, etc. It can be applied as an up cosmetic.

Hereinafter, the present invention will be described with reference to Examples, but the present invention is not limited to the scope of the Examples. In this example, various measurements and evaluations were carried out by the following methods.

(Number average molecular weight Mn)
The number average molecular weight of the polymer was measured by a gel permeation chromatography (GPC) method using polystyrene as a standard substance under the following conditions.
Measuring device: HLC-8320GPC (manufactured by Tosoh)
Column: K-806L (manufactured by Shodex), 2 series detector: RI
Eluent: 1 mmol / L-Farmin DM20 (manufactured by Kao Corporation) / CHCl ₃
Flow rate: 1.0 mL / min
Column temperature: 40 ° C

(Deformation rate)
A 10% by mass hexamethyldisiloxane solution of the polymer of the component (A) used in each composition was prepared. 0.005 g of this solution is applied to one side of a polyethylene sheet 1 (“LL film” manufactured by Enshu Kasei Kogyo Co., Ltd.) having a width (W) of 20 mm × a length (L0) of 100 mm × a thickness of 0.03 mm, as shown in FIG. In a constant temperature bath set at 40 ° C., the polyethylene sheet 1 was applied to a range of width 20 mm × length 50 mm (part 2 shown in FIG. 1 (a)) from one end 1a of the short side of the polyethylene sheet 1 in the length direction. It was dried for 10 minutes. In the dried polyethylene sheet (FIG. 1 (b)), the length of the polyethylene sheet in the portion coated with the solution is L1 (50 mm), and the length of the polyethylene sheet deformed (curled) by shrinkage after drying is L2. L2 / L1 was calculated, and this value was used as the deformation ratio of the polymer. L2 was the average value of the values measured on the two long sides of the polyethylene sheet 1.

(Bending resistance)
A 30% by mass hexamethyldisiloxane solution of the polymer of the component (A) used in each composition was prepared. This solution was applied to a polyethylene terephthalate film (Toray Industries, Inc. "Lumirror 100T60") having a width of 50 mm, a length of 100 mm, and a thickness of 0.1 mm using a 200 μm applicator, and was placed in a constant temperature bath set at 40 ° C. for 120 minutes. The film was dried to prepare a film with a polymer film (test piece).
Using the obtained test piece, a bending resistance test was performed in accordance with the cylindrical mandrel method specified in JIS K5600-5-1: 1999. Using a type 1 bending tester (Mandrel 266, a bending tester manufactured by Ericssen), the diameter of the test piece is 32 mm, 25 mm, 20 mm, 16 mm, 12 mm, 10 mm, so that the surface of the test piece on the polymer film side is on the outside. Bending resistance tests were carried out sequentially from the cylindrical mandrel having the largest diameter using the cylindrical mandrel of 8 mm, 6 mm, 4 mm, 3 mm, and 2 mm. The test was terminated when cracks were generated in the polymer film, and the minimum diameter (mm) of the cylindrical mandrel in which no cracks were generated was defined as the bending resistance value. The smaller this value is, the better the bending resistance is.

(Vaporization rate)
0.5 g of a sample was placed in a glass petri dish having a diameter of 40 mm, and under 1 atm, 60% R. H. On a hot plate set at 40 ° C., the mixture was allowed to stand for 30 minutes to dry. The sample mass before drying was W ₀ (g), the sample mass after drying was W ₁ (g), and the value of {(W ₀ − W ₁ ) / W ₀ } × 100 was defined as the volatility (%). The larger this value is, the faster the volatilization rate is, and the easier it is to dry.

(Wrinkle improvement effect)
Five expert panelists applied 0.2 g of each composition with their fingers in the form shown in FIG. 2 so as to sandwich the law line on the mouth of one side of the face. After drying at room temperature (25 ° C.) for 10 minutes, the wrinkle improving effect was sensory-evaluated according to the following criteria. The results are shown by the total score of 5 people.
5: The wrinkles have become considerably thinner.
4: Wrinkles have become thinner.
3: The wrinkles have become slightly thinner.
2: Wrinkles remain and do not change much.
1: No change.

(Fineness of finish)
After each composition was applied to the skin and dried by five expert panelists, the fineness of the finish was sensory-evaluated according to the following criteria. The results are shown by the total score of 5 people.
5; It looks very fine.
4; The texture looks fine.
3; The texture looks a little fine.
2; The texture does not look very fine.
1; The texture does not look fine.

(Difficult to peel off over time)
Five expert panelists applied each composition to the skin, dried it, and then sensory-evaluated the ease of peeling of the coating film on the skin after 4 hours had passed based on the following criteria. The results are shown by the total score of 5 people.
5; Not peeled off.
4; Not much peeled off.
3; Slightly peeled off.
2; It is peeling off.
1; It is considerably peeled off.

(Appearance (not whitened))
Five expert panelists applied each composition to the skin, dried it, and then sensory-evaluated the appearance of the coating film on the skin 4 hours later according to the following criteria. The results are shown by the total score of 5 people.
5; Does not look white.
4; It doesn't look very white.
3; Part of it looks a little white.
2; Partially looks white.
1; The whole looks white.

(Finish (uniform))
Five expert panelists applied each composition to the skin, dried it, and then sensory-evaluated the uniformity of the finish after 4 hours had passed based on the following criteria. The results are shown by the total score of 5 people.
5; The finish looks fairly uniform.
4; The finish looks uniform.
3; The finish looks a little uniform.
2; The finish looks a little uneven.
1; The finish looks uneven.

Examples 1 to 13, Comparative Example 1
A skin external preparation composition (liquid) having the composition shown in Table 1 was produced, and the wrinkle improving effect, fineness of finish, resistance to peeling over time, appearance (not whitening), and finish (uniformity) were evaluated. The results are also shown in Table 1.

(Production method)
The oil phase component obtained by mixing the components (A), (B) and (C) was dispersed with a disper and then stirred with a homomixer to obtain a skin external preparation composition.

In Table 1, * 1 to * 3 are as follows.
* 1: "NBN-30-ID" manufactured by Shin-Etsu Chemical Co., Ltd. (in the following formula (6), e / f = 60/40 (mol / mol), Mn = 360,000 norbornene / tris (trimethylsiloxy) silyl norbornene) A solution of the copolymer in isododecane, effective concentration: 30% by mass) was dried under reduced pressure at 50 ° C. for 12 hours, and the obtained solid content was used.

* 2: Obtained by drying "TSPL-30-ID" (tri (trimethylsiloxy) pullulan silylpropylcarbamide acid, effective content concentration: 30% by mass) manufactured by Shin-Etsu Chemical Co., Ltd. at 50 ° C. for 12 hours under reduced pressure. Solid content was used.
* 3: "X21-5595" manufactured by Shin-Etsu Chemical Co., Ltd. (isododecane solution of trimethylsiloxysilicic acid, effective concentration: 60% by mass) was dried under reduced pressure at 50 ° C. for 12 hours, and the obtained solid content was used.

Examples 14-17
The skin external preparation composition having the composition shown in Table 2 was produced in the same manner as in Examples 1 to 13.
All of the obtained external preparations for skin can improve wrinkles, obtain a fine-textured, uniform and clean finish, and suppress peeling and whitening of the coating film over time.

In Table 2, * 4 is as follows.
* 4: Depressurize "XS66-B8226" (cyclopentasiloxane solution of trifluoropropyldimethyl / trimethylsiloxysilicic acid, effective concentration: 50% by mass) manufactured by Momentive Performance Materials Japan GK at 50 ° C for 12 hours. It was dried and the obtained solid content was used.

1 Polyethylene sheet 1a One end of the short side of polyethylene sheet 1 2 The part to which the polymer solution is applied

Claims (7)

The following components (A), (B) and (C):
(A) A polymer having a silicone structure, the deformation ratio measured by the following method (1) is 0.3 or more and 1 or less, and the bending resistance by the cylindrical mandrel method performed by the following method (2). In the sex test, 4 to 30% by mass of the polymer having a minimum diameter of 2 mm or more and 25 mm or less of a cylindrical mandrel that does not cause cracks in the polymer film.
Method (1): A 10% by mass hexamethyldisiloxane solution of the polymer is prepared. 0.005 g of the solution was applied to one side of a polyethylene sheet having a width of 20 mm, a length of 100 mm, and a thickness of 0.03 mm in a range of 20 mm in width and 50 mm in length from one end of a short side in the length direction. Dry for 10 minutes in a constant temperature bath set at ° C. The length of the polyethylene sheet of the portion coated with the solution is L1, the length of the polyethylene sheet of the portion deformed by shrinkage after drying is L2, and the value of L2 / L1 is defined as the deformation ratio.
Method (2): A 30% by mass hexamethyldisiloxane solution of the polymer is prepared. The solution is applied to a polyethylene terephthalate film having a width of 50 mm, a length of 100 mm and a thickness of 0.1 mm using a 200 μm applicator, and dried in a constant temperature bath set at 40 ° C. for 120 minutes to prepare a test piece. The test piece is used to perform a bending resistance test in accordance with the cylindrical mandrel method specified in JIS K5600-5: 1: 1999, and the minimum diameter of the cylindrical mandrel at which the polymer film on the test piece does not crack. Ask for.
(B) At 1 atm, 40 ° C., 60% R. H. Volatile oil with a volatility of 14% or more after drying for 30 minutes.
(C) A skin external preparation composition containing a dimethicone crosslinked elastomer. The skin external preparation composition according to claim 1, wherein the content of the component (B) is 1 to 95% by mass. The skin external preparation composition according to claim 1 or 2, wherein the content of the component (C) is 0.1 to 30% by mass. The skin external preparation composition according to any one of claims 1 to 3, wherein the mass ratio (A) / (C) of the component (A) to the component (C) is 0.3 to 150. The skin external preparation composition according to any one of claims 1 to 4, wherein the component (B) is one or more selected from isododecane, hexamethyldisiloxane, methyltrimethicone and octamethyldimethylpolysiloxane. .. The skin external preparation composition according to any one of claims 1 to 5, wherein the component (B) contains at least hexamethyldisiloxane. The skin external preparation composition according to any one of claims 1 to 6, wherein the mass ratio (A) / (B) of the component (A) to the component (B) is 0.05 to 1.

Images