JP6106777B2 - Topical skin preparation - Google Patents

Description

  The present invention relates to an external preparation for skin having excellent moisturizing feeling and good touch with reduced squeaky feeling.

  It is known that a biphenyl compound having a hydroxyl group has an excellent tyrosinase activity inhibitory effect and melanin production inhibitory effect and is highly safe, and is useful as a component for whitening cosmetics (Patent Documents 1 and 2). Ceramide and cholesterol are components necessary for the composition and maintenance of cell membranes, and it is known that the skin condition can be improved by adapting them to the skin. In addition, ultraviolet absorbers are used in many cosmetics in order to prevent damage to the skin and the composition from ultraviolet rays. Recently, 2- (4-diethylamino-2-hydroxybenzoyl) -hexyl ether such as 2- (4-diethylamino-2-hydroxybenzoyl) benzoate is used. The use of UVA ultraviolet absorbers is progressing.

However, many of these substances are powders or solids at room temperature and are stable per se, but are insoluble or poorly soluble in water, and also have poor solubility in nonpolar oils. It is known to be a substance. For this reason, it has been difficult to obtain an external preparation for skin in which these hardly soluble substances are blended in a sufficient amount.
Therefore, specific polar oils (dicarboxylic acid or derivatives thereof, monoglyceryl isostearate, trialkyl ester phosphate, alkyl lactate ester) are used to stably blend these poorly soluble substances into external preparations such as cosmetics. , Propylene glycol fatty acid ester, etc.) and the like have been proposed to be stably blended into an external preparation for skin (see Patent Documents 3 to 7).

JP-A-6-145040 JP 7-25743 A JP 2008-7433 A JP 2008-7434 A JP 2008-7435 A JP 2008-7436 A JP 2008-31144 A

However, since these external preparations containing specific polar oils and poorly soluble substances are slippery and feel smooth, a refreshing finish can be obtained, but a squeaky or moisturizing feel can be obtained. I found out that it was difficult to feel the feeling. It has also been found that if a large amount of polar oil is blended in a skin external preparation to dissolve a hardly soluble substance, it becomes difficult to maintain stability.
Therefore, the subject of this invention is providing the skin external preparation which mix | blends a poorly soluble substance stably and has a favorable moisturizing feeling and a usability | use_condition.

  Therefore, as a result of studying various components in order to improve the solubility of the hardly soluble substance and to improve the decrease in the feeling of use due to the influence of the polar oil, the present inventors have added the insoluble substance to the polar oil. When the polyacrylamide compound and the phospholipid are used in combination, it has been found that the feeling of use is good and the stability is excellent, and the present invention has been completed.

That is, this invention provides the skin external preparation characterized by containing the following component (A)-(D).
(A) One or more selected from the group consisting of a biphenyl compound represented by the general formula (1) or (2), cholesterol, phytosterol, ceramide, and a solid UV absorber at 25 ° C. (B) IOB value is 0 .3 to 0.5 polar oil (C) polyacrylamide compound (D) phospholipid

(Wherein R ¹ and R ² each represent a hydrogen atom or a linear or branched alkyl group or alkenyl group having 1 to 10 carbon atoms)

(Wherein R ³ and R ⁴ each represent a linear or branched alkyl group, alkenyl group, hydroxyalkyl group or hydroxyalkenyl group, aldehyde group or acetyl group having 1 to 5 carbon atoms)

  According to the present invention, it is possible to suppress a squeaky feeling derived from polar oil, make it easy to feel a moisturizing feeling, and to stably add a hardly soluble substance. In particular, when two or more kinds of poorly soluble substances are used in combination, precipitation tends to occur. However, in the external preparation for skin of the present invention, even when two or more kinds of hardly soluble substances are used in combination, while maintaining a good feel, An external preparation for skin having excellent stability can be provided.

  (A) One or more selected from (A) a biphenyl compound represented by the following general formula (1) or (2), ceramide, cholesterol, phytosterol and a solid UV absorber at 25 ° C. It is known as a substance that is solid at 25 ° C., is insoluble or has low solubility in water, and has low solubility in nonpolar oils.

  The biphenyl compound represented by the following general formula (1) or (2) is a known substance that is a powdery substance at room temperature and is known to have an excellent tyrosinase activity inhibitory effect and melanin production inhibitory effect. . For example, dichloroeosol, tetrahydrodioigenol, tetrahydromagnolol and the like can be mentioned. These biphenyl compounds can be synthesized and used by a conventional method, or those obtained from plants and the like can be hydrogenated.

(Wherein R ¹ and R ² each represent a hydrogen atom or a linear or branched alkyl group or alkenyl group having 1 to 10 carbon atoms)

(Wherein R ³ and R ⁴ each represent a linear or branched alkyl group, alkenyl group, hydroxyalkyl group or hydroxyalkenyl group, aldehyde group or acetyl group having 1 to 5 carbon atoms)

Among these, from the viewpoint of its whitening effect and stability, as the R ¹ and R ² in the general formula (1), a hydrogen atom, or a straight-chain alkyl group having 1 to 10 carbon atoms preferably from 1 to carbon atoms Eight linear alkyl groups are more preferred. In the general formula (2), R ³ and R ⁴ are preferably a linear or branched alkyl group having 1 to 5 carbon atoms, a hydroxyalkyl group, an aldehyde group, or an acetyl group, and a linear chain having 1 to 3 carbon atoms. The alkyl group is more preferable. More preferably, it is preferably 2,2′-dihydroxy-5,5′-di-n-propylbiphenyl (general formula (1): R ¹ and R ² are C ₂ H ₅ ).

In the general formula (1), specific examples of R ¹ and R ² are H, CH ₃ , C ₂ H ₅ , C ₃ H ₇ , C ₄ H ₉ , C ₅ H ₁₁ , C ₆ H ₁₃ , C, respectively. One type selected from ₇ H ₁₅ , C ₈ H _{17 and the} like can be mentioned. In the general formula (2), specific examples of R ³ and R ⁴ are CH ₃ , C ₂ H ₅ , C ₃ H ₇ , CH ₂ OH, C ₃ H ₆ OH, CHO, COCH ₃ , CH ₂ CH, respectively. = 1 type selected from CH _{2 and the} like.

Examples of the ceramide include ceramides having various structures generally referred to as type 1 to type 6. Either sphingosine or phytosphingosine is used as a skeleton, and fatty acid, α-hydroxy acid or ω-hydroxy acid is bonded by an amide bond. There are several compounds with different fatty acid carbon numbers and unsaturation levels. All of them are high in crystallinity and have a high melting point, so that they are difficult to be stably mixed in a preparation. Of these, (2S, 3R) -2-octadecanoylaminooctadecane-1,3-diol (hereinafter referred to as ceramide 2), N-2-hydroxystearoyl phyto is preferable because of easy availability in the market. Sphingosine (hereinafter referred to as ceramide 6). These are obtained by extraction or synthesis from animals and plants, but are not limited thereto.
Specifically, N-stearoyl phytosphingosine (made by Nikko Chemicals), ceramide HO3 (made by Croda Japan), ceramide 2 (TIC-001 made by Takasago International Corporation), etc. are mentioned.

Cholesterol and phytosterol are substances that have a sterol skeleton, do not dissolve in water, and are difficult to dissolve in oils. Examples of phytosterols include substances containing β-sitosterol, stigmasterol, and campesterol.
As what is marketed, Presome CI (Nippon Seika Co., Ltd.), Presome CSII-101 (Nippon Seika Co., Ltd.), Phytopresome (Nippon Seika Co., Ltd.), etc. can be mentioned.

Examples of the UV absorber solid at 25 ° C. include 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1 , 3,5-triazine, diethylhexylbutamide triazone, 4-tert-butyl-4′-methoxy-dibenzoylmethane and the like.
These are commercially available, UVINUL A PLUS (2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester; manufactured by BASF), UVINUL T-150 (2,4,6-tris [4- ( 2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine (manufactured by BASF), diethylhexylbutamide triazone includes UVASORB HEB (manufactured by 3V GROUP) and the like.

  Among the components (A), the biphenyl compound represented by the general formula (1) or (2), ceramide, cholesterol, phytosterol, 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4 1,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine, diethylhexylbutamidotriazone and 4-tert-butyl-4′-methoxy-dibenzoylmethane Species or two or more are preferred. In the present invention, even when two or more of these components are contained, a stable moisturizing feeling and a feeling of use can be obtained.

  The content of the component (A) in the external preparation for skin of the present invention is preferably 0.01 to 8% by mass, more preferably 0.05 to 5%, based on the total amount of external preparation for skin, from the viewpoints of stability and sensory characteristics. It is 0.1 mass%, More preferably, it is 0.1-3 mass%.

  The (B) polar oil in the present invention is an oily component having an IOB value of 0.3 to 0.5. The IOB value is an abbreviation for Inorganic / Organic Balance (inorganic / organic ratio), and is a value corresponding to the ratio of the inorganic value of the compound to the organic value of the compound, and is an index indicating the degree of polarity of the organic compound It is. Specifically, it is expressed as IOB value = inorganic value / organic value.

  Here, for each of the “inorganic value” and “organic value”, for example, “organic value” is 20 for one carbon atom in the molecule, and “inorganic value” is 100 for one hydroxyl group. As described above, “inorganic value” and “organic value” corresponding to various atoms or functional groups are set, and “inorganic value” and “organic value” of all atoms and functional groups in the organic compound. Is integrated to calculate the IOB value of the organic compound (see, for example, Yoshio Koda, “Organic Conceptual Diagram—Basics and Applications”, pages 11-17, published by Sankyo Publishing, 1984).

  (B) As a polar oil having an IOB value of 0.3 to 0.5, from the viewpoint of stability and moisturizing feeling, (i) a polarity having an organic value of 700 or less and an IOB value of 0.3 to 0.5 Preferred are polar oils selected from oils and (ii) N-acyl amino acid esters having an organic value of 1000 or more and an IOB value of 0.3 to 0.5. More preferably, (i) a polar oil with an organic value of 200-600 and an IOB value of 0.3-0.5, and (ii) an organic value of 1100-1300 with an IOB value of 0.3-0. A polar oil selected from 5 N-acylamino acid esters, more preferably (i) a polar oil having an organic value of 250 to 450 and an IOB value of 0.3 to 0.5, and (ii) an organic value. Is a polar oil selected from N-acylamino acid esters having 1150 to 1250 and an IOB value of 0.3 to 0.5.

  (B) The content of the polar oil having an IOB value of 0.3 to 0.5 is preferably 1 to 40% by mass, more preferably 1 to 40% by mass with respect to the total amount of the external preparation for skin. It is 15 mass%, More preferably, it is 3-13 mass%.

  (B) Polar oils having an IOB value of 0.3 to 0.5 may be used alone or in combination of two or more. However, from the viewpoint of stability and moisturizing feeling, (i) the organic value is It is preferable to use a polar oil having an IOB value of not more than 700 and an IOB value of 0.3 to 0.5, and (ii) an N-acyl amino acid ester having an organic value of not less than 1000 and an IOB value of 0.3 to 0.5. . More preferably, (i) a polar oil having an organic value of 200-600 and an IOB value of 0.3-0.5, and (ii) an organic value of 1100-1300 and an IOB value of 0.3-0. N-acylamino acid ester of 5, and more preferably (i) a polar oil having an organic value of 250 to 450 and an IOB value of 0.3 to 0.5, and (ii) an organic value of An N-acyl amino acid ester having an IOB value of 1 to 1250 and an IOB value of 0.3 to 0.5 is used in combination.

  (B) (i) A polar oil having an organic value of 700 or less and an IOB value of 0.3 to 0.5 includes higher fatty acid polyhydric alcohol ester, dicarboxylic acid ester, higher fatty acid ester, higher alcohol and lactic acid ester. Examples include polar oils having an organic value of 700 or less and an IOB value of 0.3 to 0.5. Specifically, propylene glycol isostearate (inorganic value: 166, organic value: 410, IOB value: 0.4), propylene glycol oleate (inorganic value: 162, organic value: 420, IOB value: 0) 39), ethylene glycol dioctanoate (inorganic value: 120, organic value: 340, IOB value: 0.35), diethylene glycol dicaprate (inorganic value: 195, organic value: 480, IOB value:. 41), propylene glycol dicaproate (inorganic value: 120, organic value: 300, IOB value: 0.4), glyceryl dimyristate (inorganic value: 220, organic value: 620, IOB value: 0.00). 35), glyceryl dicoconut oil fatty acid (inorganic value: 220, organic value: 540, IOB value: 0.41), glyceryl dilaurate (inorganic value) 220, organic value: 540, IOB value: 0.41), diethylene glycol dilaurate (inorganic value: 195, organic value: 560, IOB value: 0.35), polyethylene glycol dilaurate (inorganic value: 270) , Organic value: 600, IOB value: 0.45), glyceryl monostearate (inorganic value: 180, organic value: 500, IOB value: 0.36), glyceryl sesquioleate (inorganic value) : 243, organic value: 600, IOB value: 0.41), diisopropyl sebacate (inorganic value: 120, organic value: 300, IOB value: 0.4), diethyl sebacate (inorganic value: 120) , Organic value: 280, IOB value: 0.43), tri (capryl / capric acid) glyceryl (inorganic value: 180, organic value: 540, IOB value: 0.3) ), Glyceryl tri-2-ethylhexanoate (inorganic value: 180, organic value: 510, IOB value: 0.35), trimethylolpropane trioctanoate (inorganic value: 180, organic value: 550, IOB) Value: 0.33), glyceryl tricaprylate (inorganic value: 180, organic value: 540, IOB value: 0.33), ethylene glycol palmitate (inorganic value: 160, organic value: 360, IOB value) : 0.44), castor oil fatty acid methyl (inorganic value: 162, organic value: 380, IOB value: 0.43), myristyl alcohol (inorganic value: 100, organic value: 280, IOB value: 0) .36), ethylene glycol monooleate (inorganic value: 162, organic value: 400, IOB value: 0.41), ethylene glycol monostearate (inorganic value: 160, organic value: 400, IOB value: 0.4), propylene glycol monostearate (inorganic value: 160, organic value: 420, IOB value: 0.38), coconut oil alcohol (inorganic value: 100, organic value: 240, IOB value: 0.42, lauryl alcohol (inorganic value: 100, organic value: 240, IOB value: 0.42), octyldodecyl lactate (inorganic value: 160, organic) Property value: 450, IOB value: 0.36), oleyl lactate (inorganic value: 162, organic value: 420, IOB value: 0.39), cetyl lactate (inorganic value: 160, organic value: 380) , IOB value: 0.42) and the like.

  Among these, particularly from the viewpoint of high solubility and stability of the preparation after emulsification, diethyl sebacate, propylene glycol isostearate, octyldodecyl lactate, propylene glycol dicaprate, and diisopure sebacate are more preferable. Are octyldodecyl lactate, propylene glycol dicaprate, diisopropyl sebacate.

  (B) (i) The content of the polar oil having an organic value of 700 or less and an IOB value of 0.3 to 0.5 is 1 to 30 in terms of stability and sensory characteristics with respect to the total amount of the external preparation for skin. It is preferable that it is mass%, More preferably, it is 1-10 mass%, More preferably, it is 3-10 mass%.

  (B) (ii) An N-acyl amino acid ester having an organic value of 1000 or more and an IOB value of 0.3 to 0.5 is an ester of an N-acyl amino acid and an alcohol. Although it does not specifically limit as an N-acylamino acid part, It is desirable that it is N-acyl acidic amino acid which is N-acyl aspartic acid or N-acyl glutamic acid, More preferably, the thing of N-acyl glutamic acid is used. These amino acid structures may be either optically active or racemic. The acyl group is preferably an acyl group derived from a saturated or unsaturated fatty acid having 8 to 22 carbon atoms. For example, the acyl group of a fatty acid having a single composition such as lauric acid, palmitic acid, stearic acid, oleic acid, etc. In addition, it may be a mixed fatty acid obtained from nature such as coconut oil fatty acid, beef tallow fatty acid, hardened beef tallow fatty acid, or an acyl group of fatty acids (including branched fatty acids) obtained by synthesis.

  The ester-forming residue is not particularly limited, but sterol, liquid higher alkyl or alkenyl alcohol having 8 to 30 carbon atoms, solid higher alkyl alcohol having 12 to 38 carbon atoms, and the like are desirably used. In the case of an N-acyl acidic amino acid ester, it may be a monoester or a diester, but is particularly preferably a diester in which at least one of two ester-generating residues is a sterol residue. . The sterol may be animal-derived or plant-derived, and examples thereof include cholesterol, phytosterol, and hydrogenated products thereof. The liquid higher alkyl or alkenyl alcohol having 8 to 30 carbon atoms is a natural or synthetic aliphatic alcohol having 8 to 30 carbon atoms and exhibits a liquid state at room temperature, for example, a branched alcohol such as 2-octyldodecyl alcohol, Examples thereof include unsaturated alcohols such as oleyl alcohol. Solid higher alkyl alcohols having 12 to 38 carbon atoms are saturated monohydric alcohols having 12 to 38 carbon atoms and exhibit a solid form at room temperature, and examples thereof include cetyl alcohol and behenyl alcohol.

  These N-acyl amino acid esters are used alone or in combination of two or more, and preferably include those having a sterol residue as an ester residue.

  Specifically, N-lauroyl-L-glutamate di (phytosteryl 2-octyldodecyl) (inorganic value: 369, organic value: 1214, IOB value: 0.3), N-lauroyl-L-glutamate di (Cholesteryl behenyl octyldodecyl) (inorganic value: 369, organic value: 1218, IOB value: 0.3), N-lauroyl-L-glutamate di (cholesteryl octyldodecyl) (inorganic value: 369, Organic value: 1198, IOB value: 0.3), N-lauroyl-L-glutamate di (phytosteryl, behenyl, 2-octyldodecyl) (inorganic value: 369, organic value: 1236, IOB value: 0. 3). Of these, N-lauroyl-L-glutamate di (phytosteryl 2-octyldodecyl) is particularly preferable.

  These (B) (ii) N-acylamino acid esters are generally commercially available and are sold by Ajinomoto Co., Inc., “Eldue PS203” (N-lauroyl-L-glutamate di (phytosteryl / octyldecyl)), “Eldue CL-301” (N-lauroyl glutamate di (cholesteryl / behenyl / octyldodecyl)), “Eldue Cl-202” (N-lauroyl glutamate di (cholesteryl / octyldodecyl)), “Eldue PS-304” (N -Lauroylglutamate di (phytosteryl / behenyl / octyldodecyl)), "Erudu PS-306", etc. can be illustrated.

  (B) (ii) N-acylamino acid esters may be used alone or in admixture of two or more. The content of (B) (ii) N-acylamino acid ester is preferably 0.05 to 10% by mass, more preferably 0.1 to 10% from the viewpoint of stability and sensory characteristics with respect to the total amount of the external preparation for skin. It is 5 mass%, More preferably, it is 0.1-3 mass%.

  The (C) polyacrylamide compound in the present invention is one or more polymers selected from the group of homopolymers or copolymers of acrylamide and derivatives thereof. The polyacrylamide compound includes polyacrylamide and acrylamide copolymer. Examples of the polyacrylamide copolymer include a copolymer containing acrylamide and / or acryloyldimethyltaurine as a structural unit.

  Examples of polyacrylamide and copolymers thereof include (hydroxyethyl acrylate / acryloyl dimethyl taurine Na) copolymer, (Na acrylate / acryloyl dimethyl taurine) copolymer, polyacrylamide, polyacrylic acid Na, (acrylamide / ammonium acrylate) copolymer, and the like. Can be mentioned.

  Examples of the (hydroxyethyl acrylate / acryloyldimethyltaurine Na) copolymer include, for example, sepinobu EMT10 from SEPPIC or SIMULGEL NS ((hydroxyethyl acrylate / acryloyldimethyltaurine Na) copolymer, squalane, polysorbate 60, which is a composite material. Water (containing 35 to 40% by mass of a copolymer of hydroxyethyl acrylate / acryloyldimethyltaurine Na) can be used.

  Examples of the (Na / acryloyl dimethyl taurate acrylate) copolymer include SIMULGEL EG ((Na acrylate / acryloyl dimethyl taurine) copolymer, isohexadecane, polysorbate 80, water; water; (Na / acryloyl acrylate). Dimethyl taurine) copolymer (containing 37.5% by mass), SIMULGEL EPG ((Na acrylate / acryloyl dimethyl taurine) copolymer, polyisobutene, (caprylyl / capryl) glucoside, water) and the like can be used.

  Examples of polyacrylamide include a cross-linked copolymer of 2-acrylamido-2-methylpropanesulfonic acid. For example, Sepigel 305 (polyacrylamide, hydrogenated polyisobutene, laureth-7, water; 40% by mass) and Sepigel 501 (polyacrylamide, polysorbate 85, mineral oil, isoparaffin; containing 20% by mass of polyacrylamide) can be used.

  As the (acrylamide / ammonium acrylate) copolymer, SEPPIC 265 ((acrylamide / ammonium acrylate) copolymer, polyisobutene, polysorbate 20, water), which is a composite material of SEPPIC, can be used.

  These (C) polyacrylamide compounds are more preferably polyacrylamide or acrylamide copolymers, and particularly preferably (hydroxyethyl acrylate / acryloyldimethyltaurine Na) copolymer, (Naacrylate / acryloyldimethyltaurine) copolymer, poly Acrylamide. When these are used, they are hardly affected by the eluted ions and have excellent stability.

  (C) The content of the polyacrylamide compound is 0. 0 from the viewpoint of stability and sensory characteristics with respect to the total amount of the external preparation for skin. 05-5 mass% is preferable, More preferably, it is 0.1-4 mass%, More preferably, it is 0.15-2.5 mass%.

  The mass ratio of component (B) to component (C) [(B) :( C)] is preferably 50: 1 to 2: 1 and more preferably 20 from the viewpoint of suppression of stickiness and squeak. : 1 to 5: 1.

  As the phospholipid (D) in the present invention, it is preferable to use a phospholipid having a phosphatidylcholine content of 60% by mass or more in the phospholipid. More preferred is a phospholipid having a phosphatidylcholine content of 65% by mass or more, and further preferred is a phospholipid having a phosphatidylcholine content of 70% by mass or more. Examples of phospholipid components other than phosphatidylcholine include phosphatidic acid, phosphatidylserine, phosphatidylethanolamine, phosphatidylinositol, and phosphatidylglycerol.

  The phospholipid used in the present invention may be a natural product extracted and purified from animals and plants, or may be chemically synthesized, and may be subjected to processing such as hydrogenation or hydroxylation. As a natural product, lecithin, which is an extract / purified product from soybean or egg yolk, is preferable because it is easy to obtain a commercial product. More preferable phospholipids are phospholipids that have been hydrogenated or hydroxylated from the viewpoint of improving the stability of the emulsion, and examples thereof include soybean lecithin hydrogenated products and egg yolk lecithin hydrogenated products.

  The content of phosphatidylcholine in the phospholipid can be analyzed by a method using thin layer chromatography (TLC), high performance liquid chromatography (HPLC), Iatroscan (manufactured by Yatron) or the like. For example, an organic solvent containing phospholipid described in JP-A-2001-186898 is spotted on TLC, developed with chloroform: methanol: acetic acid = 65: 25: 10, sprayed with 50 wt% ethanol sulfate, and after heating A method of analyzing phospholipids with a densitometer is mentioned. In addition to the above method, any method may be used as long as it can measure and calculate the content and content of phosphatidylcholine contained in the phospholipid.

  Examples of phospholipids containing 60% by mass or more of phosphatidylcholine include coatsome NC-21 (hydrogenated soybean lecithin; manufactured by NOF Corporation), resinol S-10E, and resinol S-10EX (hydrogenated soybean lecithin; Nikko Chemicals). Manufactured).

  (D) A phospholipid may be used independently and may be used in mixture of 2 or more types. (D) The content of the phospholipid is preferably 0.0001 to 20% by mass, more preferably 0.001 to 15% by mass, and still more preferably, from the viewpoint of stability and sensory characteristics with respect to the total amount of the external preparation for skin. Is 0.01 to 12% by mass, more preferably 0.01 to 5% by mass.

  In the external preparation for skin of the present invention, it is preferable to further contain (E) a highly polymerized polyethylene glycol having a mass average molecular weight of 1000 to 20000 from the viewpoint of obtaining a better feel. The mass average degree of polymerization is preferably 2000 to 11000, and more preferably 3000 to 6000.

<Measurement of mass average molecular weight>
The mass average molecular weight (Mw) can be measured by gel permeation chromatography (GPC) method using high performance liquid chromatography. In this case, a calibration curve is obtained by using 10 kinds of polyethylene glycols having molecular weights of 106, 194, 440, 600, 1470, 4100, 7100, 10300, 12600, and 23000 as standard samples. The mass average molecular weight (Mw) can be determined.

  As these highly polymerized polyethylene glycols, specifically, POLYOX WSR N-10, POLYOX WSR N-12K (manufactured by Amerchol), RITA PEO-1, RITA PEO-2 (manufactured by Rita), PEG # 2000, It is commercially available under the trade names of PEG # 4000 and PEG # 6000 (manufactured by NOF Corporation). From these highly polymerized polyethylene glycols, one or two or more can be appropriately selected and used.

  (E) The content of the highly polymerized polyethylene glycol is preferably 0.1 to 5% by mass, more preferably 0.5 to 3% by mass with respect to the total amount of the external preparation for skin, from the viewpoint of stability and sensory characteristics. Yes, and more preferably 0.5-2% by mass.

  In addition to the above components, the topical skin preparation of the present invention includes water; water-soluble dyes; preservatives such as paraben and phenoxyethanol; anionic surfactants such as sodium cetyl sulfate and N-stearoyl-L-glutamate; Nonionic surfactants such as monohydric alcohol fatty acid esters, polyglycerin fatty acid esters, modified silicones, sucrose fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene fatty acid esters; cationic surfactants such as tetraalkylammonium salts; Amphoteric surfactants such as betaine type, sulfobetaine type and sulfoamino acid type; natural surfactants such as cerebroside; antioxidants such as dibutylhydroxytoluene; sodium chloride, magnesium chloride, sodium sulfate, potassium nitrate, potassium phosphate, Sodium triphosphate Inorganic salts such as, citric acid, sodium citrate, potassium acetate, sodium oxalate, sodium aspartate, organic acid salts such as sodium lactate, carnitine salt, gamma aminobutyric acid, lipoic acid; ethanolamine hydrochloride, ammonium nitrate, arginine hydrochloride Salts such as edetic acid, etc .; neutralizing agents such as potassium hydroxide, diisopropanolamine and triethanolamine; biopolymers such as collagen; placental extract; ultraviolet absorbers such as hydroxymethoxybenzophenone sulfonate Oil-soluble vitamin C derivatives such as ascorbyl palmitate, ascorbyl stearate, ascorbyl tetraisostearate; polysaccharides extracted from xanthan gum, beta glucan, oats, white jellyfish, carrageenan, alginic acid, agar, etc. Those extracted from seaweed, such as carboxyvinyl polymers, pectins, water-soluble polymers such as alkyl-modified carboxyvinyl polymer may be blended.

  For the skin external preparation of the present invention, a plant, seaweed or fungus extract can be further used. For example, artichoke, eye, arnica, aloe, altea, ashitaba, acerola, apricot, almond, amateur, akebi, anise, Avocado, Ginseng, Nettle, Strawberry, Fennel, Turmeric, Prickly Pear, Oolong Tea, Usenia Oy, Ages, Echinacea, Oat, Emperor, Edelweiss, Dutch Mustard, Aubergine, Ogon, Ouren, Greater Cranberry, Orange Hypericum, Leaf Cassis, valerian, persimmon, fire thorn, chamomile, cam cam, carrot, oakworm, oats, licorice, cucumber, kyounin, kiwi, kina, kiraya, kizuta, gabba tea, mallet, clara, kumazasa, mulberry, Lumi, Grapefruit, Gentian Ginger, Gentian, Getto, Kohiratambutsu, Burdock, Comfrey, Wheat Germ, Cherry, Salmon, Salvia, Hawthorn, Saishin, Saitai, Sanshi, Shimotake, Shiyaku, Shichihenge, Shobu, Ginger, Shiba, Shiso Peonies, Giants, Seekers, Simon, Horsetails, Star Fruits, Zeniahoi, Senkyu, Prunus Hawthorn, Prunus Kizuta, Pears, White Willow, Sage, Assembly, Soybean, Daidai, Thyme, Tachibana, Tachikaku, Tamarind, Tea, Clove, Chimpi, persimmon, dokudami, touki, tonin, spruce, tomato, tokisenka, wisteria tea, tormentilla, corn, neem, nigahakka, elderberry, garlic, nin , Wild rose, papuames, hibiscus, parsley, banana, rose, pearl barley, hachiwame, pecan nut, cypress, hyssop, himalayan raspberry, peafowl, sandalwood, bilberry, loquat, prunes, grapes, chrysanthemum, chrysanthemum, peppermint, peppermint , Safflower, loofah, hera plantain, white genepi, cypress, linden tree, button bowfish, button, hop, jojoba, quince, squid, melon, maroon, pine, mandarin orange, melissa, melissa, evening primrose, peach, maple, cornflower, cypress Lily, persimmon, yokuinin, mugwort, orchid, lime, lavender lettuce, apple, ryukyu mugwort, rooibos, forsythia, lemon, lemon balm, rosehip, rosemary, green algae , Red algae, brown algae, broomfish, shiitake mushrooms, mushrooms, Sarno mushrooms, white jellyfish, litchi, cordyceps, yeast, lactic acid bacteria, rhizobial whole plants, leaves, stems, roots, fruits, seeds, flowers, fruit bodies, body to water, Or it is an extract extracted with organic solvents, such as glycerol, propylene glycol, ethanol, butylene glycol, or its liquid mixture. Chlorophyll is also a plant extract. In addition, lactic acid bacteria and yeast culture solutions using raw milk, fruit juice, synthetic medium, and semi-synthetic medium can be used regardless of whether or not the cells are removed.

  There is no restriction | limiting in particular as a use of the skin external preparation of this invention, It can use suitably for cosmetics, a pharmaceutical, a quasi-drug, etc. Specifically, for external use such as facial cleansers, cleansing cosmetics, lotions, emulsions, beauty creams, base cosmetics, sunscreen cosmetics, packs, massage cosmetics and other skin cosmetics, ointments containing various drugs, creams, etc. It can be suitably used as a medicine. In particular, since the external preparation for skin of the present invention is excellent in the moisturizing feeling, it is preferably used as a type of external preparation for skin that is not washed away and is retained on the skin.

  The dosage form of the external preparation for skin of the present invention is not particularly limited, and is prepared as a liquid, emulsion, gel, spray, mousse or the like.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail based on an Example and a comparative example, it is not limited to these. First, the stability test, sensory test, and moisture retention test of the external preparation for skin used in Examples and Comparative Examples will be described below.

[Stability test]
Each sample was stored in a thermostatic bath at 5 ° C. for 6 months, and then the sample was observed with a microscope to confirm the presence or absence of crystallization and to evaluate the stability. Moreover, after preserve | saving for 6 months at 40 degreeC in a thermostat, the external appearance observation of the sample was performed and stability was evaluated.

[Stability test (5 ° C) evaluation criteria]
○: No crystals Δ: Slightly crystals ×: Crystals [Stability test (40 ° C) evaluation criteria]
○: No change in appearance △: Part of oil floating is observed ×: Completely separated

[Sensory test]
Ten evaluation panelists used the samples, and evaluated the stickiness and squeakiness after application.

[Evaluation criteria for sensory tests]
1. Stickiness ◎: Nine or more of the 10 respondents do not feel sticky ○: Seven or eight of the ten respondents do not feel sticky △: Five or ten of the ten respondents do not feel sticky × : Less than 5 out of 10 feel no stickiness 2. Sense of squeezing ◎: 9 or more out of 10 responded that they did not feel squeezed ○: 8 out of 10 responded that they did not feel squeezed △: 6 out of 10 responded that they did not feel squeaky × : Less than 5 out of 10 responded that they did not feel squeak

[Moisture retention test] Measurement of stratum corneum moisture content A certain amount of the composition used in Examples and Comparative Examples was applied to the upper arm of 10 people, and the stratum corneum moisture content before application, 1 hour after application, and 3 hours after application. Was measured using Skicon-200 (manufactured by IBS Co., Ltd.) based on the method of Tagami et al.

○: The numerical value of 8 or more out of 10 people increased △: The numerical value of 5-7 out of 10 people increased ×: The numerical value of less than 5 out of 10 people increased

Examples 1-9, Comparative Examples 1-6

  Table 1 shows the compositions used in the examples and comparative examples, and the stability test results and sensory test results.

  The samples of Examples 1 to 9 of the present invention were relatively stable after storage at 5 ° C. for 6 months. On the other hand, in Comparative Examples 1-6, although it was prepared smoothly immediately after preparation, after storage at 5 ° C for 6 months, crystals were confirmed, or separation was observed after storage at 40 ° C for 6 months. Moreover, although the samples of Examples 1-9 had a moisturizing feeling, they did not feel sticky and squeaky, whereas Comparative Examples 1-6 were inferior in their feeling of use.

Application Example 1 Emulsion Palmitic acid 0.1
2. Hydrogenated soybean phospholipid 0.4
3.2'-Dihydroxy-5,5'-di-n-propylbiphenyl
0.5
4). Isostearic acid 0.6
5. Dipropylene glycol 3.0
6). Cholesterol 0.2
7). Diisopropyl sebacate 3.0
8). Octyldodecyl myristate 1.0
9.1,3-Butylene glycol 3.0
10. Edetate disodium 0.02
11. Carboxyvinyl polymer 0.02
12 Celtic roll 0.03
13. Phenoxyethanol 0.3
14 Ethanol 6.0
15. SEPIGEL 305 (manufactured by SEPPIC) 0.17
16. Fragrance 0.05
17. Fire thorn extract (* 1) 0.1
18. Kyonin extract (* 2) 0.1
19. Hydrolyzed conchiolin solution (* 3) 0.1
20. Oat extract (* 4) 0.1
21. Hydrolyzed silk solution (* 5) 0.1
22. Purified water balance (* 1) Fire thorn (Suntory)
(* 2) Kyonin extract LA (Maruzen Pharmaceutical Co., Ltd.)
(* 3) Pearl protein extract K (Maruzen Pharmaceutical Co., Ltd.)
(* 4) Awaku extract J (Maruzen Pharmaceutical Co., Ltd.)
(* 5) Silk protein extract K (Ichimaru Falcos)

(Production method)
(1) Components 1 to 9 are heated to 80 ° C. and mixed uniformly.
(2) Heat components 10-12 and 24 to 80 ° C. and mix uniformly.
(3) While (2) is heated and maintained at 80 ° C., it is gradually added to (1) and mixed uniformly.
(4) (3) is gradually cooled to 40 ° C, and components 13 to 23 are added at 40 ° C and mixed uniformly.

Application Example 2 Cream Macadamia nut oil fatty acid cholesteryl 2.0
2. Behenyl alcohol 1.5
3. Phytosterol 0.4
4). Plant-based squalane 4.0
5. Octyldodecyl myristate 2.5
6). Hydrogenated soybean phospholipid 0.5
7). Propylene glycol isostearate 5.0
8. 2,2′-Dihydroxy-5,5′-di-n-propylbiphenyl
0.7
9. (2S, 3R) -2-Octadecanoylaminooctadecane-1,3-diol
0.1
10. Concentrated glycerin 3.0
11.1,3-butylene glycol 2.0
12 Dipropylene glycol 5.0
13. Edetate disodium 0.12
14 Carboxyvinyl polymer 0.24
15. PEG-75 2.0
16. SIMULGEL EG (manufactured by SEPPIC) 2.56
17. Salamander extract (* 6) 0.1
18. Yeast extract (* 7) 0.1
19. Seaweed extract (* 8) 0.1
20. Green tea extract (* 9) 0.1
21. Chimpi extract (* 10) 0.1
22. Seagrass extract (* 11) 0.1
23. Hydrolyzed silk solution 0.1
24. Moon peach leaf extract (* 12) 0.1
25. N-acetylglucosamine (* 13) 0.1
26. Fragrance 0.05
27. Phenoxyethanol 0.4
28. Ethanol 3.0
29. Purified water balance (* 6) Salamander extract-J (Maruzen Pharmaceutical Co., Ltd.)
(* 7) Sightdyne (manufactured by Brooks Industry)
(* 8) LAMINAINE-BG (manufactured by Biotech Marine)
(* 9) Green tea extract BGW (Maruzen Pharmaceutical Co., Ltd.)
(* 10) Chimpi extract K65B (manufactured by NOF Corporation)
(* 11) Emerals (Technoble)
(* 12) Moon peach leaf extract BG (Maruzen Pharmaceutical Co., Ltd.)
(* 13) Marine Sweet F (made by Yaizu Suisan Chemical Co., Ltd.)

(Production method)
(1) Components 1 to 12 are heated to 80 ° C. and mixed uniformly.
(2) Components 13 to 15 and 31 are heated to 80 ° C. and mixed uniformly.
(3) While (2) is heated and maintained at 80 ° C., it is gradually added to (1) and mixed uniformly.
(4) (3) is gradually cooled to 40 ° C, and components 16 to 30 are added at 40 ° C and mixed uniformly.

Application Example 3 Sunscreen Ethanol 20.0
2. Isocetyl myristate 3.0
3. 2-Ethylhexyl paramethoxycinnamate 5.0
4.2,4,6-Tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine 2.0
5. Diisopropyl sebacate 5.0
6. 4-tert-butyl-4′-methoxydibenzoylmethane 1.0
7). Hydrogenated soybean phospholipid 0.05
8). Lauroyl glutamate di (cholesteryl / octyldodecyl)
0.5
9. PEG-75 0.5
10. Concentrated glycerin 3.0
11. Xanthan gum 0.1
12 Edetate disodium 0.02
13. Tea seed extract (* 14) 0.001
14 Whey (* 15) 0.1
15. Dioscorea compositor extract (* 16) 0.1
16. Peonies extract (* 17) 0.1
17. Toki extract (* 18) 0.1
18. SEPIPLUS 265 (manufactured by SEPPIC) 1.5
19. Perfume 0.07
20. Purified water remainder (* 14) Tea fruit extract (Maruzen Pharmaceutical Co., Ltd.)
(* 15) Whey CPA (made by Ichimaru Falcos)
(* 16) Deioscorea compositor root extract (Mitsui Chemicals)
(* 17) Peonies extract BG-JC (Maruzen Pharmaceutical Co., Ltd.)
(* 18) Toki extract LA-S (Maruzen Pharmaceutical Co., Ltd.)

(Production method)
(1) Components 1 to 9 and 19 are mixed uniformly.
(2) Components 20 to 17 and 20 are mixed uniformly.
(3) To (1), (2) is gradually added and mixed uniformly.
(4) When (3) becomes uniform, component 18 is added and mixed uniformly.

Claims (4)

A skin external preparation containing the following components (A) to (D), wherein the mass ratio of component (B) to component (C) [(B) :( C)] is 20: 1 to 5: 1 .
(A) One or more selected from the group consisting of cholesterol and phytosterols (B) Polar oils having an IOB value of 0.3 to 0.5 containing the following (i) and (ii) (i) Organic values Is 3 to 10% by weight of polar oil of 250 to 450
(Ii) 0.1 to 3% by mass of an N-acyl amino acid ester having an organic value of 1000 or more
(C) Polyacrylamide compound (D) Phospholipid Component (B) is (i) a polar oil having an organic value of 250 to 450,
(Ii) The skin external preparation according to claim 1, which contains an N-acylamino acid ester having an organic value of 1150 to 1250.   The component (C) is one or more selected from the group consisting of (hydroxyethyl acrylate / acryloyldimethyltaurine Na) copolymer, (Na acrylate / acryloyldimethyltaurine) copolymer, and polyacrylamide. The external preparation for skin according to 1 or 2.   Furthermore, (E) skin external preparation of any one of Claims 1-3 containing the high polymerization polyethyleneglycol whose mass mean molecular weight is 1000-20000.