JP3112260B2 - Skin cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a skin cosmetic containing a specific fluorine compound as an oil agent that remains on the skin for a long time.

[0002]

2. Description of the Related Art Emulsified compositions are frequently used in the fields of pharmaceuticals, cosmetics, etc., and particularly when used as an external preparation for the skin, a refreshing feeling can be obtained. An oil-in-water emulsion composition in which an oil component is dispersed in an aqueous phase is widely used. When such an oil-in-water emulsion composition is used as an external preparation for the skin, it is preferable that the composition remains on the skin for a long time. Such cosmetics and the like are required to have water resistance and oil resistance because they are exposed to perspiration and sebum secretion on the skin or washing with a detergent or the like.

However, in a conventional oil-in-water emulsion composition, for example, when it is applied to the skin, first, a thickening gelling agent or the like in an aqueous phase, which is an external phase, forms a film on the skin, and the oil is further added thereto. The phases will be arranged. Moreover,
Since the thickening gelling agent itself is hydrophilic, it is washed away by water and sweat, and despite having an oil content, it does not have sufficient water resistance, and it has poor retention on the coated surface. There was a problem. In addition, as the oil component generally used in the oil-in-water emulsion composition, semi-solid oil component, liquid oil component, solid oil component or a mixture thereof is used. Pigments and the like flow from the skin, making it difficult to maintain the effect for a long time.

As a measure for solving such problems, a fluorine-based oil having water repellency and low affinity for sebum, particularly a perfluoro compound in which all hydrogen atoms in the molecule have been replaced by fluorine atoms, has been used. An oil-in-water emulsion composition has been reported (JP-A-57-21812).

[0005] However, the above-mentioned fluorine-based oil components, especially perfluoro compounds, are non-hydrophilic and non-lipophilic, and are very difficult to emulsify. Therefore, surfactants such as high-molecular nonionic surfactants (such as polyoxyethylene-polyoxypropylene copolymer), soybean or egg yolk phospholipids, and fluorine-based surfactants have been devised.

However, a closer examination of these emulsifiers reveals that, for example, polyoxyethylene-polyoxypropylene copolymers can give considerably fine emulsified particles of a fluorine-based oil, but they are relatively large in amount. It was possible only in the presence of an emulsifier, and was not satisfactory from the viewpoint of application to cosmetics and versatility. Emulsions with sufficiently high stability have not been obtained with other surfactants. Attempts have also been made to improve the stability of the emulsion by increasing the viscosity of the emulsion using various thickeners and fatty acids, but this has never been satisfactory from the viewpoint of the versatility of the formulation.

Accordingly, an object of the present invention is to provide a skin cosmetic composition which is excellent in water repellency and oil repellency by incorporating a fluorine compound which can be easily emulsified with a small amount of a general-purpose surfactant.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object, and as a result, have been used as a solvent for removing cosmetics containing a fluorine compound from the skin. The fluorine-based compound represented by the formula (1) can be emulsified by using a general-purpose emulsifier, is easy to synthesize and has an excellent yield, and is a perfluoro compound which has not been dissolved in a conventional cosmetic general-purpose oil. It is possible to dissolve and emulsify highly fluorinated compounds, and that skin cosmetics containing these compounds have strong water and oil repellency, remain on the skin for a long time, and have excellent skin care effects. Heading, the present invention has been completed.

That is, the present invention provides the following components (a) and (b), (a) a perfluoropolymer compound and / or a fluorinated polymer compound having a molecular weight of 5,000 to 1,000,000, and (b) the following general formula (1) ),

[0010]

## STR2 ## RX- (CH ₂ ) _n Rf (1)

(Wherein, R represents a linear or branched hydrocarbon group having 2 to 30 carbon atoms, X represents an ether bond, n
Represents 1 or 2, and Rf represents a linear or branched fluorocarbon group having 3 to 20 carbon atoms or a fluorocarbon group having a hydrogen atom only at the terminal). An object of the present invention is to provide a skin cosmetic containing a fluorine compound that does not correspond to a polymer compound.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The fluorine compound represented by the general formula (1) (hereinafter referred to as "fluorine compound (1)") used in the present invention can be easily emulsified and has strong water repellency and oil repellency. Having. In the general formula (1), R has 2 to 30 carbon atoms;
In particular, it is preferably 2 to 20 straight or branched chains,
For example, ethyl group, linear or branched propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, docosyl, tetracosyl , Hexacosyl, octacosyl, triaconsyl, ethenyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, ethynyl, propynyl, butynyl, pentynyl, hexynyl, heptinyl, octynyl, noninyl, decynyl and the like. Medium, having 2 to 2 carbon atoms
A linear or branched alkyl group of 0 is more preferable, and ethyl, butyl, hexyl, octyl, decyl, and dodecyl are particularly preferable. Further, the group represented by Rf has 3 to 3 carbon atoms.
20 linear or branched fluorocarbon groups or fluorocarbon groups in which a hydrogen atom is bonded only to the terminal carbon, particularly a linear or branched perfluoroalkyl group having 3 to 18 carbon atoms or ω- It is preferably a hydroperfluoroalkyl group. For example, perfluoropropyl, perfluorobutyl, perfluoropentyl, perfluorohexyl, perfluoroheptyl, perfluorooctyl, perfluorononyl, perfluorodecyl, perfluoroundecyl, perfluoro And a stearyl group. X is an ether bond. n is 1
Or 2. Further, the total carbon number of the fluorine compound (1) is preferably 6 to 50, particularly preferably 10 to 50 in order to prevent skin irritation.

The fluorine compound (1) is, for example, Rf (C
H ₂ ) _n OH represents the following formula

[0014]

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Is produced by reacting the carbonyl compound represented by the formula (1) in a hydrogen atmosphere in the presence of a hydrogenation catalyst.

Preferred examples of the fluorine compound (1) include perfluorooctylethyl decyl ether, perfluorohexylethyl-1,3-dimethylbutyl ether, perfluorooctylethyl ethyl ether, perfluorostearyl methyl ethyl ether, perfluoropropyl Ethyl octyl ether, perfluorooctyl ethyl octyl ether, perfluorobutyl ethyl hexyl ether and the like can be mentioned. These fluorine compounds (1) can be used singly or as a mixture of two or more kinds. The compounding amount of the component in the cosmetic is 0.0001 to 20% by weight (hereinafter simply referred to as “the composition”). %), Particularly preferably 0.001 to 10%.

The component (a) used in the present invention, the perfluoropolymer compound having a molecular weight of 5,000 to 1,000,000 and the fluorinated polymer compound, can be dissolved and emulsified in the component (b). Of these, the molecular weight is 500
0 to 500,000, preferably 10,000 to
Particularly preferably, it is 300,000. Molecular weight 50
If it is 00 to 1,000,000, dissolution in the component (b),
It is easy to emulsify and can impart strong water repellency and oil repellency to skin cosmetics.

Examples of the component (a) include a fluorinated acrylic acid polymer, a fluorinated alkylene oxide polymer, a perfluoropolyether, and a fluorine-modified silicone. As the fluorinated acrylic acid polymer, the following general formula (2):

[0019]

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(Wherein R ³ is a C ₁ -C ₃₀ alkyl group;
Perfluoroalkyl group R ⁴ is C ₁ ~C _20, n ₁ is 1
5, X and Y each have a molecular weight of 5000 to 1,000,000, preferably 5000 to 500000, particularly preferably 10 to 10,000,000.
000 to 300,000, and the ratio of X to Y is X: Y = 8: 2 to 1: 9, especially X: Y = 5: 5 to 1:
9 is preferable. ) Is preferable, and a perfluoromethacrylate / alkyl methacrylate copolymer having a molecular weight of 10,000 to 300,000 (the ratio of X to Y in the general formula (2) is 1/4) is particularly preferable. .
As the fluorinated alkylene oxide polymer, for example, the following general formula (3):

[0021]

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(Wherein m represents an integer of from 60 to 100,000, preferably from 100 to 10,000). Poly (trifluoropropylene oxide) represented by the following formula is preferred.

As the perfluoropolyether, for example, the following general formula (4):

[0024]

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Where R^Five, R⁷, R⁸And R⁹Are the same
However, they may be different from each other,
Represents a cycloalkyl group or a perfluoroalkyloxy group.
Then R⁶Represents a fluorine atom or a perfluoroalkyl group
Then a_l, B_lAnd c_lHas a molecular weight of 5000 to 1000
Indicates a number of 0 or more that is 000. Where a_l= B_l=
c _l= 0. )
It is. Here, each perfluoro group shown in parentheses is
It is not necessary to arrange them in this order, and even in random polymerization
Block polymerization may be used. Such perfluoropoly
As the ether, a viscosity of 5 to 5,000 cs (cent
(Stokes) liquid is preferable.
General formula (5)

[0026]

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(Where d is_lAnd e_lHas a molecular weight of 5000
Indicates a number that becomes １０００1,000,000, d ₁/ E₁Is 0.2
~ 2. ) FOMBLIN HC-R represented by
(Average molecular weight 6,600) (manufactured by Montefros) and
General formula (6) of

[0028]

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[0029] (In the formula, f _l has a molecular weight of 5,000 to
0000. Demnum S-2 represented by)
Commercial products such as 0 (weight average molecular weight 25,000), S-100 (5,600) and S-200 (8,400) (all manufactured by Daikin Industries, Ltd.) can be used.

As the fluorine-modified silicone, for example, one of the structural units represented by the following general formulas (7) to (10):
Those having the above and the structural unit represented by the following general formula (11) can be given.

[0031]

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[Wherein R ¹² and R ¹³ may be the same or different and each is a linear or branched perfluoroalkyl group having 1 to 20 carbon atoms or the following formula: H (CF ₂ ) _g1- ( g ₁
Represents an ω-H-perfluoroalkyl group represented by the following formula: wherein R ¹⁰ , R ¹⁵ and R ¹⁶ may be the same or different and have a straight-chain chain of 1 to 20 carbon atoms. Or a branched aliphatic hydrocarbon group or an alicyclic or aromatic hydrocarbon group having 5 to 10 carbon atoms; R ¹¹ represents a hydrogen atom,
A linear or branched aliphatic hydrocarbon group having 1 to 20 carbon atoms, an alicyclic or aromatic hydrocarbon group having 5 to 10 carbon atoms, a perfluoroalkyl group having 1 to 20 carbon atoms, or the following formula: H ( CF _{2) g1} - (g ₁ represents an integer of 1 to 20)
An ω-H-perfluoroalkyl group represented by the formula:
¹⁴ represents a divalent hydrocarbon group having 2 to 6 carbon atoms; X ² and Y ² is a single bond, -CO- or a divalent hydrocarbon group having 1 to 6 carbon atoms; i ₁ is indicates the number of 2 to 16, j ₁ and k ₁ each represents the number of 1 to 16, h ₁ is 20
Indicates the number of 0, w ₁ represents a number of 0~20, v ₁ is 0
Show the number of 200]

In the structural units represented by the general formulas (7) to (11), as the perfluoroalkyl group represented by R ¹² and R ¹³ , any of a linear or branched perfluoroalkyl group can be used. For example, CF ₃ −, C ₂ F ₅ −, C ₄ F
_{9 -, C 6 F 13 -} , C 8 F 17 -, C 1 0 F 21 -, H (CF 2)
_{2 -, H (CF 2)} 4 -, H (CF 2) 6 -, H (CF 2) 8
—, (C ₃ F ₇ ) C (CF ₃ ) ₂ — and the like. Further, _{g in} H (CF ₂ ) _g − is 6 to 2
An integer of 0 is preferred. Examples of the hydrocarbon group represented by R ¹⁰ , R ¹⁵ and R ¹⁶ include straight-chain groups such as methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl and decyl. Branched alkyl group such as isopropyl group, s-butyl group, t-butyl group, neopentyl group, 1-ethylpropyl group, and 2-ethylhexyl group; cyclic alkyl group such as cyclopentyl group and cyclohexyl group; phenylnaphthyl And an aromatic hydrocarbon group such as a group. As the divalent hydrocarbon group represented by R ^14, preferably is a linear or branched alkylene group having 2 to 4 carbon atoms, particularly an ethylene group, a propylene group are preferable.

As the fluorine-modified silicone having such a structural unit, for example, the following general formula (12)

[0035]

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[Wherein at least one of Z ¹ and Z ² represents a structural unit selected from the general formulas (7) to (10);
The remainder represents a single bond, and v ₁ , R ¹⁵ and R ¹⁶ have the same meanings as described above], or the following general formula (13)

[0037]

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Wherein Z ³ is a group represented by the general formulas (7) to (10)
Wherein R ¹⁷ is a linear or branched aliphatic hydrocarbon group having 1 to 20 carbon atoms or 5 to 5 carbon atoms.
Alicyclic or aromatic hydrocarbon group of _10;
Represents a number from 0 to 200, and v ₁ , R ¹⁵ and R ¹⁶ have the same meanings as described above].

The structural units represented by the general formulas (7) to (11) and the groups in each formula in the fluorine-modified silicone represented by the general formulas (12) and (13) include water repellency, oil repellency, The following are preferred from the viewpoint of usability. R ¹² and R ^{13 each} represent a linear or branched perfluoroalkyl group having 6 to 20 carbon atoms or the following formula: H (CF ₂ ) _q1 −
(Q ₁ is an integer of 6-20) preferably omega-H- perfluoroalkyl group represented by. R ¹⁰ , R ¹⁵ and R ¹⁶
May be the same or different and have 1 to 4 carbon atoms
Is preferably a linear or branched aliphatic hydrocarbon group. R ¹¹
Is a hydrogen atom, a perfluoroalkyl group having 6 to 20 carbon atoms or the following formula: H (CF ₂ ) _q1- (q ₁ is 6 to 20)
Ω-H-perfluoroalkyl group represented by the following formula: R ¹⁴ is preferably a divalent hydrocarbon group having 2 to 4 carbon atoms. X ² and Y ² are a single bond, -C
O- or a divalent hydrocarbon group having 1 to 4 carbon atoms is preferable,
i ₁ is preferably a number of 2 to 10, particularly 2 to 5, j ₁ and k ₁ are each preferably a number of 2 to 10, especially 1 to 6, and h ₁ is a number of ₁ to 100, particularly 1 to 10. Is preferred,
w ₁ is preferably a number of 0 to 20, particularly 0 to 5, and v ₁ is 0.
A number of from 100 to 100, in particular from 0 to 10, is preferred. The arrangement of the structural units of the fluorine-modified silicone represented by the general formula (13) may be alternate, block or random.

Further, as a preferred example of the fluorine-modified silicone, a polymerization degree of from 2 to 200 described in JP-A-5-247214, having structural units represented by the general formulas (8) and (11), is preferable. JP-A-6-18 having a structural unit represented by formula (9)
No. 4312, fluorine-modified silicone having a degree of polymerization of 2 to 200, commercially available FSL-3 manufactured by Asahi Glass Co., Ltd.
00, X-22-819, X-22 manufactured by Shin-Etsu Chemical Co., Ltd.
-820, X-22-821, X-22-822 and F
L-100, Toray Dow Corning Silicone FS
-1265 and the like.

The above component (a) is added to component (b) by 30
% By weight, preferably from the viewpoint of stability of the emulsion.
It is preferred that the content be from 01 to 5% by weight.

In the cosmetic of the present invention, optional components commonly used in cosmetics, quasi-drugs, pharmaceuticals and the like may be appropriately added as necessary, in addition to the above components, as long as the effects of the present invention are not impaired. it can. Examples of such optional components include purified water, a surfactant, an oily component, a humectant, a thickener, and the like.

The surfactant may be a nonionic, anionic, cationic or amphoteric surfactant. Examples of the nonionic surfactant include polyoxyethylene castor oil and hydrogenated castor oil derivatives such as polyoxyethylene castor oil and polyoxyethylene hydrogenated castor oil; polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan tetraoleate Polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene glyceryl monostearate and polyoxyethylene glyceryl triisostearate; fatty acid esters of polyoxyethylene glycol; polyoxyethylene octyl dodecyl ether, polyoxyethylene lauryl ether, polyoxy Polyoxyethylene alkyl ethers such as ethylene cetyl ether, polyoxyethylene stearyl ether, and polyoxyethylene nonyl phenyl ether; In addition to polyoxyethylene addition type surfactant, polyglycerin alkyl ethers, polyglycerin fatty acid ester, and sucrose fatty acid esters.

Examples of the anionic surfactant include polyoxyethylene alkyl sulfate surfactants such as sodium polyoxyethylene lauryl ether sulfate and polyethanolamine lauryl ether triethanolamine; sodium lauroyl sarcosine, lauroyl methyl alanine N-acyl amino acid salt surfactants such as sodium; sodium polyoxyethylene lauryl ether phosphate, sodium polyoxyethylene cetyl ether phosphate, dipolyoxyethylene alkyl ether phosphoric acid, tripolyoxyethylene alkyl ether phosphoric acid, dipoly Polio such as oxyethylene nonyl phenyl ether phosphate, sodium polyoxyethylene lauryl ether phosphate, sodium dipolyoxyethylene lauryl ether phosphate, etc. Shi ethylene alkyl ether phosphate-based surfactants, alkyl sulfate surfactant, alkyl phosphate-based surfactants, and the like fatty acid salt-based surfactant.

Examples of the amphoteric surfactant include alkyl betaine and alkyl amide betaine. Examples of the cationic surfactant include di-long-chain alkyl quaternary ammonium salts, mono-long-chain alkyl quaternary ammonium salts, di-long-chain alkyl polyoxyethylene quaternary ammonium salts, bis (hydroxyalkyl) quaternary ammonium salts, and amides. / Quaternary ammonium salts having an ester bond.

Specific examples of the oily component include squalane,
Ethyl arachidonic acid, ethyl linolenate, isononyl isononanoate, octyl isopalmitate, isopropyl linoleate, octyl isoperargonate, oleyl linoleate, isotridecyl isononanoate, ethyl linoleate, isopropyl isostearate, isocetyl octanoate, oleyl eica Isostearyl octanoate,
Isodecyl pivalate, Isodecyl isononanoate, Elsyl eica, Octyldodecyl oleate, Isostearyl pivalate, Isostearyl isostearate,
Isocetyl isostearate, isostearyl eica, octyl dodecyl eica, isopropyl oleate, octyl dodecyl dimethyl octanoate, hexyl decyl dimethyl octoate, oleyl myristate, stearyl eica, ethyl oleate, decyl oleate, isocetyl stearate, Octyl stearate,
Octyldodecyl stearate, isostearyl palmitate, isocetyl palmitate, octyl palmitate, isostearyl myristate, isocetyl myristate, isotridecyl myristate, octyldodecyl myristate, isostearyl laurate, hexyl isostearate, myristyl isostearate, isostearin Lauryl acid, stearyl oleate, cetyl oleate, isobutyl stearate, isobutyl palmitate, isopropyl palmitate, octyl myristate, isodecyl laurate, butyl isostearate, octyl pelargonate, isopropyl myristate, isoamyl laurate, isohexyl laurate ,
Myristyl neopentanoate, isobutyl pelargonate,
Lauryl palmitate, decyl myristate, ethyl stearate, ethyl palmitate, butyl myristate, ethyl laurate, methyl myristate, methyl laurate, propylene glycol dinonanoate, diisopropyl sebacate, glyceryl trioctanoate, glyceryl tricaprate, adipin Diisobutyl acid, neopentyl glycol dicaprate, propylene glycol dicaprate, dihexyl adipate, glyceryl triacetyl ricinoleate, diisopropyl adipate, glyceryl tricaprate, diglyceryl triisostearate, diethyl sebacate, diglyceryl monoisostearate , Butyl adipate, dibutyl adipate, diisostearyl malate, octyl oxystearate Octyl methoxycinnamate, octyl dodecyl lactate, isostearyl lactate, oleyl lactate, methyl ricinoleate, octyl paradimethylaminobenzoate, myristyl lactate, dl-α-tocopherol, dl-α-tocopherol nicotinate, lauryl lactate, monoisostearin And diglyceryl monomyristate.

Of these, isotridecyl isononanoate, neopentyl glycol dicaprate, and diglyceryl monomyristate monoisostearate are particularly preferred.

Examples of the humectant include propylene glycol, isopropylene glycol, 1,3-butanediol, dipropylene glycol, glycerin, diglycerin, triglycerin, polyglycerin, trimethylolpropane, erythritol, pentaerythritol,
Sorbitan, sorbitol, glucose, maltitol, saccharose, trehalose, ethylene oxide or propylene oxide adducts of sugars or sugar derivatives, polyethylene glycol, ethanol and the like, especially glycerin, sorbitol, maltitol, polyoxyethylene methyl glucoside and the like An ethylene oxide adduct of a sugar derivative and ethanol are preferred. These are used alone or in combination of two or more.

Specific examples of the thickener include specific inorganic compounds and high-molecular substances. Examples of the inorganic compound include various clay minerals such as montmorillonite and silica. Examples of the polymer substance include polyethylene glycol, alginate, xanthan gum, carboxyvinyl polymer, hydroxyethyl cellulose, hydroxymethyl cellulose, and cationized cellulose.

The skin cosmetic of the present invention can be produced by mixing and stirring the fluorine compound (1) and other components according to a conventional method. The dosage form of the present invention can be arbitrarily selected from creams, ointments, emulsions, lotions, solutions, and gels.

The skin cosmetic of the present invention has excellent emulsion stability and forms a coating film having excellent water repellency and oil repellency on the skin. Therefore, it is particularly preferably used as a skin care cosmetic.
In particular, it is preferably used as a skin care cosmetic to be applied to undressed skin.

[0052]

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

Synthesis Example 1 2- (perfluorohexyl) ethanol 1 was placed in a 70 ml autoclave equipped with a hydrogen gas inlet tube and a stirrer.
8.2 g (0.05 mol), 20 g (0.20 mol) of 4-methyl-2-pentanone, 5% Pd-C as a catalyst
(PH 7.2) 0.36 g, hydrogen pressure 50 kg / c
The mixture was stirred at 150 ° C. for 7 hours at m ² . After completion of the reaction, the catalyst was removed by filtration, and excess 4-methyl-2 was removed under reduced pressure.
Pentanone was removed. Further purification is performed by silica gel column chromatography, and 18.4 g of desired perfluorohexylethyl-1,3-dimethylbutyl ether is obtained.
(0.041 mol). The isolation yield was 82%.

Examples 1 to 6 and Comparative Examples 1 to 4 Cosmetics were produced according to the usual methods using the formulations shown in Tables 1 and 2.

[0055]

[Table 1]

[0056]

[Table 2]

Test Example 1 The emulsified state, water repellency and oil repellency of the cosmetic obtained above were evaluated according to the following evaluation criteria. The results are shown in Tables 1 and 2. In addition, the emulsion stability was visually observed after storage for 3 months at -5 ° C to 40 ° C after preparation. The water repellency and oil repellency were measured by applying 50 μl of the cosmetic obtained above on a tanned leather and allowing it to stand at room temperature and room humidity overnight, and measuring the contact angle of water and squalane in the cosmetic application area the next day. And water repellent /
Oil repellency was evaluated. The evaluation results were based on the following criteria. (Evaluation criteria) ・ Emulsification stability ◎: Completely emulsified (at each temperature) ○: Almost completely emulsified △: Slightly insufficient emulsification ×: Not emulsified at all ・ Water repellency, oil repellency ◎: Water contact angle of 60 ° or more, squalane contact angle of 70 °
○: Water contact angle of 60 ° or more, squalane contact angle of 50 °
Not less than 70 ° Δ: water contact angle 50 ° or more, squalane contact angle 30 °
Not less than 50 ° C: Contact angle of water 50 ° or more, Contact angle of squalane 30 °
Less than

From Tables 1 and 2, it was confirmed that the cosmetics of Examples 1 to 6 were superior to the cosmetics of Comparative Examples 1 to 4 in both emulsified state and water and oil repellency.

[0059]

The cosmetic of the present invention contains a specific fluorine compound which can be easily emulsified with a general-purpose surfactant, and is excellent in water repellency and oil repellency. The cosmetic of the present invention is particularly useful as a skin care cosmetic.

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shinji Yano 1334 Minato, Wakayama City, Wakayama Prefecture Kao Corporation Laboratory (56) References JP-A-8-59448 (JP, A) JP-A-4-100534 (JP, A) JP-A-8-291045 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61K 7/00 A61K 7/48

Claims (5)

(57) [Claims] 1. The following components (a) and (b), (a) a perfluoropolymer compound and / or a fluorinated polymer compound having a molecular weight of 5,000 to 1,000,000, and (b) the following general formula (1): 1) R—X— (CH ₂ ) _n Rf (1) (wherein, R represents a linear or branched hydrocarbon group having 2 to 30 carbon atoms, X represents an ether bond, n represents 1 or Rf represents a straight-chain or branched-chain fluorocarbon group having 3 to 20 carbon atoms or a fluorocarbon group having a hydrogen atom only at the terminal), and the fluorinated polymer compound of the above (a) Skin cosmetics containing a fluorine compound that does not fall under 2. The component (a) is at least one member selected from the group consisting of fluorinated acrylic acid polymers, fluorinated alkylene oxide polymers, perfluoropolyethers, and fluorine-modified silicones. The skin cosmetic according to the above. 3. The skin cosmetic according to claim 1, wherein the blending amount of the component (a) with respect to the component (b) is 30% by weight or less. 4. The skin cosmetic according to claim 1, which is a skin care cosmetic. 5. Component (b) is added in an amount of 0.0001 to 20% by weight.
The skin cosmetic according to any one of claims 1 to 4, which is incorporated.