JP7696152B2 - Skin external composition - Google Patents

Description

The present invention relates to compositions for external use on the skin, such as cosmetics for preventing sunburn.

Compositions for topical application to the skin that contain ultraviolet absorbents have been known in the past. For example, these types of compositions for topical application to the skin are used in applications such as cosmetics for preventing sunburn.

Examples of this type of skin topical composition include:
Contains no powder,
An oil-soluble ultraviolet absorber;
a triester of glycerin and a linear saturated fatty acid having 16 to 26 carbon atoms, or an oligomer ester of glycerin and a linear saturated fatty acid having 16 to 26 carbon atoms and an aliphatic saturated dibasic acid having 12 to 28 carbon atoms;
An acrylic acid-based thickener,
A composition for external application to the skin containing 50% by mass or more of water is known (Patent Document 1).

The skin topical composition described in Patent Document 1 can suppress the stickiness and sliminess of the UV absorbent, as well as secondary adhesion, and can be applied evenly without wrinkling the coating film. The skin topical composition described in Patent Document 1 also has good stability.

JP 2016-069325 A

However, although the composition for external use on the skin described in Patent Document 1 has resistance to transfer after application (i.e., secondary adhesion is suppressed), it does not have good water resistance after application.
Therefore, there is a demand for a composition for external use on the skin that not only has good resistance to transfer after application, but also has good water resistance.

In consideration of the above problems and demands, the present invention aims to provide a composition for topical use on the skin that has good water resistance and transfer resistance after application.

The composition for external use on skin according to the present invention comprises:
(A) an ultraviolet absorber containing at least a methoxycinnamate ester;
(B) a glycerin fatty acid ester;
(C) water,
The (B) glycerin fatty acid ester is
A fatty acid including a linear saturated fatty acid, a branched saturated fatty acid, and an aliphatic dicarboxylic acid;
It is characterized by being an esterification reaction product of glycerin.

The skin topical composition according to the present invention may further contain (D) a dicarboxylic acid polyglycerol ester.

The skin topical composition according to the present invention may further contain (E) a dicarboxylic acid diester having a total carbon number of 14 to 20.

The skin topical composition according to the present invention may be a cosmetic preparation for preventing sunburn.

The skin topical composition of the present invention exhibits good water resistance and transfer resistance after application.

One embodiment of the topical skin composition according to the present invention is described below.

The composition for external use on skin of the present embodiment comprises:
(A) an ultraviolet absorber containing at least a methoxycinnamate ester;
(B) a glycerin fatty acid ester;
(C) water,
The (B) glycerin fatty acid ester is
A fatty acid including a linear saturated fatty acid, a branched saturated fatty acid, and an aliphatic dicarboxylic acid;
It is an esterification reaction product of glycerin.

By containing the above-mentioned (A), (B), and (C), the topical skin composition of this embodiment can have good water resistance and transfer resistance after application. Specifically, after the topical skin composition of this embodiment is applied to the skin, the coating film is not easily removed by water, and when the coating film comes into contact with something, the coating film is prevented from transferring and being removed.

The ultraviolet absorber (A) (hereinafter also referred to simply as component A) contains at least a methoxycinnamate ester (paramethoxycinnamate ester).
Examples of methoxycinnamic acid (cinnamic acid) esters include ethyl methoxycinnamate, propyl methoxycinnamate, butyl methoxycinnamate, hexyl methoxycinnamate, n-octyl methoxycinnamate, 2-ethylhexyl methoxycinnamate, and decyl methoxycinnamate.
Preferably, the ultraviolet absorber of component A contains at least 2-ethylhexyl methoxycinnamate (2-ethylhexyl paramethoxycinnamate).

The (A) ultraviolet absorber may further include an ultraviolet absorber other than methoxycinnamate ester.
Examples of compounds that can be contained in the UV absorber of component A (compounds other than methoxycinnamate esters) include salicylic acid compounds such as homomenthyl salicylate, octyl salicylate, and triethanolamine salicylate; paraaminobenzoic acid (PABA) compounds such as paraaminobenzoic acid, ethyl dihydroxypropyl paraaminobenzoate, glyceryl paraaminobenzoate, octyl dimethyl paraaminobenzoate, amyl paradimethylaminobenzoate, and 2-ethylhexyl paradimethylaminobenzoate; 4-(2-β-glucopyranosyloxy)propoxy-2-hydroxybenzophenone, dihydroxydimethoxybenzophenone, sodium dihydroxydimethoxybenzophenone disulfonate, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfuric acid, 2,2'-dihydroxy-4-methoxybenzophenone, 2,4-dihydroxy Benzophenone, 2,2'4,4'-tetrahydroxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2-hydroxy-4-N-octoxybenzophenone and other benzophenone-based compounds; di-paramethoxycinnamate mono-2-ethylhexanoate glyceryl, methyl 2,5-diisopropylcinnamate, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, methyl trimethoxycinnamate bis(trimethylsiloxy)silylisopentyl, isopropyl paramethoxycinnamate-diisopropyl cinnamate mixture, p-methoxyhydrocinnamate diethanolamine salt and other cinnamic acid-based compounds; 2-phenyl-benzimidazole-5-sulfuric acid, 4-isopropyldibenzoylmethane, 4-tert-butyl-4'-methoxydibenzoylmethane and other benzoylmethane-based compounds; and the like.
Other examples of compounds that can be included in the (A) ultraviolet absorber include octocrylene, dimethoxybenzylidene dioxoimidazolidine 2-ethylhexyl propionate, 1-(3,4-dimethoxyphenyl)-4,4-dimethyl-1,3-pentanedione, cinoxate, methyl-O-aminobenzoate, 3-(4-methylbenzylidene)camphor, octyl triazone, diethylamino hydroxybenzoyl benzoic acid hexyl ester, bisethylhexyloxyphenol methoxyphenyl triazine, and methylene bisbenzotriazolyl tetramethylbutylphenol.
These compounds may be used alone or in combination of two or more.

Component A may contain methoxycinnamate ester and at least one selected from the group consisting of diethylaminohydroxybenzoylhexyl benzoate, bis2-ethylhexyloxyphenol methoxyphenyl triazine, and 4-tert-butyl-4'-methoxydibenzoylmethane.

As component A, one type may be used alone, or multiple types may be used in combination. As component A, commercially available products can be used.

In the composition for external use on skin of the present embodiment, the total concentration of the component A is preferably 5% by mass or more, more preferably 10% by mass or more, and may be 25% by mass or less, or may be 20% by mass or less.
By setting the total concentration of component A to 5% by mass or more, adverse effects of ultraviolet rays on the skin (such as sunburn) can be more adequately prevented, and by setting the total concentration of component A to 25% by mass or less, the sensation of use when the composition for external use on the skin is more favorable when applied to the skin.

The skin topical composition of this embodiment may contain 3% by mass or more and 10% by mass or less of methoxycinnamate ester as component A. The skin topical composition of this embodiment may further contain 0.1% by mass or more and 10% by mass or less of an ultraviolet absorbing agent other than methoxycinnamate ester.

(B) Glycerin fatty acid ester (hereinafter also referred to simply as component B) is an esterification reaction product of glycerin and fatty acids including linear saturated fatty acids, branched saturated fatty acids, and aliphatic dicarboxylic acids. In other words, component B is a triester of glycerin, and is a compound in which, on average, one mole each of linear saturated fatty acids, branched saturated fatty acids, and aliphatic dicarboxylic acids are esterified with one mole of glycerin.

The linear saturated fatty acid for producing component B is a monocarboxylic acid having a total carbon number of 12 to 26, and is a compound containing a linear saturated hydrocarbon portion and a carboxy group.
As the above-mentioned straight-chain saturated fatty acid, for example, at least one selected from the group consisting of lauric acid, myristic acid, palmitic acid, stearic acid, and behenic acid is preferable, at least one of stearic acid and behenic acid is more preferable, and behenic acid is even more preferable.

The branched-chain saturated fatty acid for producing component B is a monocarboxylic acid having a total carbon number of 12 or more and 26 or less, and is a compound containing a branched-chain saturated hydrocarbon portion and a carboxy group.
As the branched chain saturated fatty acid, for example, at least one of isopalmitic acid (2-hexyldecanoic acid) and isostearic acid (2-heptylundecanoic acid, 2-isoheptylisoundecanoic acid, etc.) is preferred, and isopalmitic acid is more preferred.

The above-mentioned aliphatic dicarboxylic acid for producing component B is a dicarboxylic acid having a total carbon number of 12 or more and 28 or less, and is a compound containing a linear saturated hydrocarbon portion and carboxy groups bonded to both ends of the saturated hydrocarbon portion.
The above-mentioned aliphatic dicarboxylic acid is preferably at least one selected from the group consisting of dodecanedioic acid, tetradecanedioic acid, hexadecanedioic acid, octadecanedioic acid, eicosane diacid, and docosane diacid, more preferably at least one selected from the group consisting of octadecanedioic acid, eicosane diacid, and docosane diacid, and even more preferably eicosane diacid.

Preferred component B is glyceryl tri(behenate/isostearate/eicosanedioate).

Component B is preferably an esterification reaction product of a fatty acid containing a linear saturated fatty acid having a total carbon number of 20 to 24, a branched saturated fatty acid having a total carbon number of 16 to 20, or an aliphatic dicarboxylic acid having a total carbon number of 18 to 22, with glycerin. This allows the product to more fully exhibit good water resistance and transfer resistance after application.

One type may be used alone or a combination of two or more types may be used as component B. Commercially available products may be used as component B.
An example of a commercially available component B is glyceryl tri(behenate/isostearate/eicosanedioate) under the product name "Nomcoat SG" manufactured by Nisshin Oillio Co., Ltd.

In the skin topical composition of the present embodiment, the total concentration of component B is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and is preferably 5% by mass or less, more preferably 3% by mass or less.
By making the total concentration of the B component 0.1% by mass or more, the composition for external use on the skin can be thickened further, and the water resistance and transfer resistance after application can be improved. Also, by making the total concentration of the B component 5% by mass or less, the composition for external use on the skin can be made to have a better feel when applied to the skin.

The topical skin composition of this embodiment preferably further contains at least one of (D) a dicarboxylic acid polyglycerol ester or (E) a dicarboxylic acid diester having a total carbon number of 14 to 20.

(D) Dicarboxylic acid polyglycerol ester (hereinafter simply referred to as component D) is an esterification reaction product between polyglycerol, which is a dehydration condensation product of multiple glycerol molecules, and dicarboxylic acid.

By further including component D, the topical skin composition of this embodiment can more fully exhibit good water resistance and transfer resistance after application.

The polyglycerol for producing component D may be a polyglycerol having 6 or more and 20 or less glycerol bonds, or may be a polyglycerol having 8 or more and 12 or less glycerol bonds.
The polyglycerol may be a mixture of multiple types of polyglycerols having different numbers of glycerol bonds (dehydration condensation numbers). Specifically, the average number of glycerol bonds (molar equivalent) in the polyglycerol may be 6 or more and 20 or less, or 8 or more and 12 or less.

The dicarboxylic acid for producing component D is a dicarboxylic acid having a total carbon number of 12 to 28, and is a compound containing a linear saturated hydrocarbon portion and carboxy groups bonded to both ends of the saturated hydrocarbon portion.

Examples of dicarboxylic acids for producing the D component include dodecanedioic acid (carbon number: 12), tetradecanedioic acid (carbon number: 14), hexadecanedioic acid (carbon number: 16), octadecanedioic acid (carbon number: 18), eicosane dioic acid (carbon number: 20), and docosane dioic acid (carbon number: 22).
The dicarboxylic acid for producing the component D may contain one type alone, or may contain multiple types having different total carbon numbers.

As the dicarboxylic acid for producing the D component, at least two selected from the group consisting of tetradecanedioic acid, hexadecanedioic acid, octadecanedioic acid, and eicosanedioic acid are preferred, with tetradecanedioic acid and eicosanedioic acid being more preferred.

Component D is preferably an ester reaction product of polyglycerol having 8 to 12 bonds in the glycerol molecule and multiple dicarboxylic acids having different total carbon numbers. Component D is more preferably an ester reaction product of polyglycerol having 8 to 12 bonds in the glycerol molecule and dicarboxylic acids having 12 to 16 total carbon numbers and dicarboxylic acids having 18 to 22 total carbon numbers.

Examples of reaction products exemplified as component D include diglyceryl (eicosane diacid/tetradecanedioic acid), triglyceryl (eicosane diacid/tetradecanedioic acid), tetraglyceryl (eicosane diacid/tetradecanedioic acid), pentaglyceryl (eicosane diacid/tetradecanedioic acid), hexaglyceryl (eicosane diacid/tetradecanedioic acid), heptaglyceryl (eicosane diacid/tetradecanedioic acid), octaglyceryl (eicosane diacid/tetradecanedioic acid), nonaglyceryl (eicosane diacid/tetradecanedioic acid), decaglyceryl (eicosane diacid/tetradecanedioic acid), undecaglyceryl (eicosane diacid/tetradecanedioic acid), and dodecaglyceryl (eicosane diacid/tetradecanedioic acid).

As component D, commercially available products can be used. For example, commercially available components D include decaglyceryl (eicosane diacid/tetradecanedioate) [polyglyceryl-10 (eicosane diacid/tetradecanedioate)] under the product name "Neosolue-AquaS" (manufactured by Nippon Fine Chemicals Co., Ltd.).

In the skin topical composition of the present embodiment, the total concentration of the D component is preferably 0.1% by mass or more, more preferably 0.2% by mass or more. The total concentration of the D component is preferably 1.0% by mass or less, more preferably 0.8% by mass or less, and even more preferably 0.5% by mass or less.
By setting the concentration of component D to 0.1% by mass or more, better water resistance and better transfer resistance can be exhibited, and by setting the concentration of component D to 1.0% by mass or less, a better feeling when applied can be achieved.

(E) Dicarboxylic acid diesters having a total carbon number of 14 to 20 (hereinafter simply referred to as E components) are diester compounds in which two molecules of monohydric alcohol are ester-bonded to two carboxy groups in one molecule of dicarboxylic acid.

By further including component E, the topical skin composition of this embodiment can have even better light durability.

The dicarboxylic acid used to produce component E is not particularly limited as long as the total carbon number of component E is 14 to 20, but examples include succinic acid (carbon number 4), adipic acid (carbon number 6), suberic acid (carbon number 8), azelaic acid (carbon number 9), sebacic acid (carbon number 10), and dodecanedioic acid (carbon number 12).

The monohydric alcohol for producing component E is not particularly limited as long as the total number of carbon atoms in component E is 14 or more and 20 or less, but examples thereof include methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol, pentyl alcohol, hexyl alcohol, octyl alcohol (e.g., 2-ethylhexyl alcohol), decyl alcohol, and dodecyl alcohol. The alkyl group in these monohydric alcohols may be linear or branched. In addition, the hydroxyl group in these monohydric alcohols may be bonded to the terminal carbon of the alkyl group, or to a carbon other than the terminal carbon.

As component E, a diester compound in which a monohydric alcohol having 2 to 8 carbon atoms (preferably 2 to 6 carbon atoms) is ester-bonded to a dicarboxylic acid having 4 to 12 carbon atoms (preferably 8 to 12 carbon atoms) is preferred. This allows for better light resistance.

The component E is preferably at least one selected from the group consisting of diisopropyl sebacate, diethyl sebacate, and di-2-ethylhexyl succinate.

As component E, one type may be used alone, or multiple types may be used in combination. As component E, commercially available products may be used.

In the skin topical composition of the present embodiment, the total concentration of component E is preferably 1% by mass or more, more preferably 2% by mass or more, and is preferably 10% by mass or less, more preferably 5% by mass or less.
By setting the concentration of component E to 1% by mass or more, the applied composition for external use on the skin can exhibit better light durability, and by setting the concentration of component E to 10% by mass or less, the feeling of use upon application can be improved.

The mass ratio of the above component A (ultraviolet absorber) to the above component B (glycerin fatty acid ester), specifically the mass ratio of the above component B to the above component A [B/A], is preferably 0.2 or less, and more preferably 0.05 or more and 0.10 or less. This allows the composition for external use on the skin to have good water resistance, good transfer resistance, and a feeling of use that spreads easily and is not sticky.

The mass ratio of the above-mentioned component A (ultraviolet absorber) to the above-mentioned component D (dicarboxylic acid polyglycerol ester), specifically the mass ratio of the above-mentioned component D to the above-mentioned component A [D/A], is preferably 0.01 or more and 0.20 or less, more preferably 0.1 or less, and even more preferably 0.05 or less. This allows the composition for external use on the skin to have good water resistance, good transfer resistance, and a usability that spreads easily and is not sticky.

The mass ratio of the A component (ultraviolet absorber) to the E component (dicarboxylic acid diester having a total carbon number of 14 to 20), specifically the mass ratio of the E component to the A component [E/A], is preferably 0.05 or more, more preferably 0.1 or more, and even more preferably 0.2 or more. The mass ratio [E/A] is preferably 0.5 or less, and more preferably 0.3 or less.

The composition for external application to the skin of the present embodiment may contain water (C) in an amount of 30% by mass or more and 90% by mass or less. The composition for external application to the skin of the present embodiment may contain water in an amount of 50% by mass or more.
The composition for external use on skin of the present embodiment is usually in a so-called oil-in-water emulsion state in which an oil phase containing the above-mentioned ultraviolet absorbent and the like is dispersed in an aqueous phase.

The above-mentioned composition for external use on the skin may further contain, in addition to the above-mentioned components, powders, thickeners, oils, antioxidants, preservatives, etc. These components may be blended for the purpose of further improving the feeling of use, transfer resistance, water resistance, etc.
The powder may include corn starch octenylsuccinate Al.
The above-mentioned composition for external use on the skin may contain ethanol, menthanediol, etc., for the purpose of providing a refreshing feeling to the skin.
The above-mentioned composition for external use on the skin may contain carboxymethyl chitosan myristamide for the purpose of imparting a moisturizing effect to the skin.

The nature of the topical skin composition of this embodiment is not particularly limited, but is, for example, liquid. The topical skin composition of this embodiment may also be solid.

The composition for external use on skin of this embodiment can be produced by a conventional method.
For example, the above-mentioned composition for external use on the skin can be produced by mixing and stirring each of the components to be blended. A general stirring device can be used. If necessary, the mixture may be stirred while being heated.

The above-mentioned topical skin composition is usually used by applying it to the skin. The above-mentioned topical skin composition may be used by applying it to, for example, the skin of the face, the skin of the neck, the skin of the limbs, the scalp, the hair, or the mucous membranes of the nostrils, lips, ears, genitals, anus, etc. The above-mentioned topical skin composition may also be used as a bath additive or as a skin patch.

The above-mentioned skin topical composition may be used, for example, as a cosmetic for preventing sunburn, as a makeup cosmetic having a sunburn prevention effect, or as a skin care cosmetic having a sunburn prevention effect.

The topical skin composition of this embodiment is not restricted by classification under the Pharmaceutical and Medical Device Act as a cosmetic, quasi-drug, or pharmaceutical product.

The skin topical composition of the present invention is as exemplified above, but the present invention is not limited to the above-exemplified embodiments. In addition, in the present invention, various forms adopted in general skin topical compositions, etc. can be adopted within the scope that does not impair the effects of the present invention.

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

Each raw material used to produce the composition for external use on skin is described below.
<Main ingredients>
(A) UV absorber having a benzene ring structure in the molecule (A-1) Ethylhexyl methoxycinnamate (commercially available product)
(A-2) Diethylaminohydroxybenzoylhexyl benzoate (commercially available product)
(A-3) Bis 2-ethylhexyloxyphenol methoxyphenyl triazine (commercially available product)
(B) Glycerin fatty acid ester (B-1) Tri(behenic acid/isostearic acid/eicosanedioic acid)glyceryl Product name: "Nomcoat SG" manufactured by Nisshin Oillio Co., Ltd. (C) Water (purified water)
(D) Dicarboxylic acid polyglycerol ester (D-1) (eicosanedioic acid/tetradecanedioic acid) polyglyceryl-10
Product name: "Neosolue-AquaS" manufactured by Nippon Fine Chemicals Co., Ltd. [Solid content 60% by weight / glycerin 40% by weight]
*Since the solids are in a diluted state, the mass of the solids is shown in the table below. (D') Similar raw materials to (D) (D'2) PEG/PPG/Polybutylene glycol-8/5/3 glycerin Product name: "WILBRIDE S-753" manufactured by NOF Corporation (D'3) Bisethoxydiglycol cyclohexanedicarboxylate Bisethoxydiglycol cyclohexanedicarboxylate Product name: "Neosolue-Aqulio" manufactured by Nippon Fine Chemicals (E) Dicarboxylic acid diesters with a total carbon number of 14 to 20 (E-1) Diisopropyl sebacate (commercially available product)
(E-2) Diethyl sebacate (commercially available product)
(E-3) Di(2-ethylhexyl) succinate (commercially available product)
(E') Similar raw materials to (E) (E'4) Isotridecyl isononanoate (commercial product)
(E'5) Alkyl benzoate (C12-15) (commercially available)
(E'6) Diisopropyl adipate (commercially available product)
(E'7) Distearyl malate (commercially available product)
(E'8) Methylheptyl laurate (commercially available product)
(E'9) Di-2-ethylhexyl adipate (commercially available product)
(E'10) Di-2-ethylhexyl sebacate (commercially available product)
<Other main ingredients>
・Thickener 1
(Acrylates/alkyl acrylate (C10-30)) copolymer Product name: "Pemulen TR-1" manufactured by Lubrizol Japan, Ltd. Thickener 2
(Hydroxyethyl acrylate/Na acryloyldimethyltaurate) copolymer Product name: "SIMULGEL FL" Manufactured by SEPPIC *Since the solid content is in a diluted state, the weight of the solid content is shown in the table below.

(Examples 15, 16 , 20 to 22 , Comparative Example 1 , Reference Examples 1 to 14, 17 to 19, 23 to 30 )
The above-mentioned raw materials were mixed in the amounts shown in the following tables to produce the skin topical compositions of the Examples, Comparative Examples , and Reference Examples . The formulations of the skin topical compositions are shown in Tables 1 to 5.
In the preparation of the skin topical composition, the aqueous component I shown in each table below was heated to 80°C while stirring with a homomixer (rotation speed: 5,000 rpm). Next, the oil component II was added and stirred at 80°C. Then, the mixture was stirred with a homomixer (rotation speed: 5,000 rpm) for 3 minutes. Next, the pH adjusting component III was added and stirred with a homomixer (rotation speed: 5,000 rpm) for 1 minute. Finally, the mixture was cooled to room temperature.

<SPF measurement method>
The skin topical composition of each Example and Comparative Example was applied to a PMMA (polymethyl methacrylate) plate and dried. Thereafter, 10 randomly selected spots on the PMMA plate were measured with an SPF analyzer (Labsphere UV-2000S, manufactured by Labsphere) to measure the SPF value.

<Evaluation of Water Resistance>
The PMMA plate coated with the skin topical composition in the same manner as above was immersed in water. In this state, a water flow was generated by a propeller, and 40 minutes were allowed to pass. The water resistance was evaluated by calculating the value related to the water resistance from each SPF value before and after immersion in water.
For more information,
[(SPF value after immersion in water)/(SPF value before immersion in water)]×100[%]
The water resistance was expressed numerically by the above formula. The higher the value, the higher the water resistance.

<Evaluation of transfer resistance>
Paper was placed on the PMMA plate on which each skin topical composition was applied, and a load of 450 g was applied for 10 minutes. The transmittance (350 nm wavelength) was measured before and after the paper was placed and the load was applied. The transfer resistance was evaluated from the change in the two measured values (transmittance value).
For more information,
The transfer resistance was expressed numerically by the formula: transmittance after placing paper - transmittance before placing paper The smaller this value, the higher the transfer resistance (i.e., the higher the transfer inhibition ability).

<Evaluation of Light Durability>
The PMMA plate coated with each skin topical composition was irradiated with light at an illuminance of 750 W/ ^m2 for 3 hours using a solar simulator (Solrabox 1500e, manufactured by JASCO Corporation). The SPF values before and after irradiation were measured in the same manner as above. The light durability was then expressed numerically based on the rate of change in SPF value.
Specifically, the light resistance was expressed as a numerical value according to the following calculation formula: The higher the numerical value, the higher the light resistance.
(SPF value after irradiation/SPF value before irradiation)×100[%]

The results of evaluating the water resistance, transfer resistance, and light durability of each topical skin composition are shown in Tables 1 to 5, respectively.

As can be seen from the above results, the skin topical composition of the example in which component A, component B, and water were combined was excellent in both water resistance and transfer resistance.
It is believed that the oil phase thickening effect of component B reduced the fluidity, thereby exhibiting water resistance and transfer resistance.
On the other hand, the skin topical composition not containing component B was poor in both water resistance and transfer resistance.
In addition, the skin topical composition of the embodiment further contains component D, which improves water resistance and transfer resistance, and improves light durability. Component D has surfactant properties and film-forming properties, which is believed to improve the uniformity of the film containing the ultraviolet absorbent. This is believed to improve water resistance and transfer resistance, and improve light durability.
Furthermore, the skin topical composition of the example further contained component E, thereby enabling it to have good light durability.

The skin topical composition of the present invention is applied to the skin for use, for example, to prevent sunburn, to prevent and reduce dry skin, and as a makeup base. The skin topical composition of the present invention is applied, for example, directly to the stratum corneum, and is suitable for use in cosmetics and the like.

Claims (4)

(A) an ultraviolet absorber containing at least a methoxycinnamate ester;
(B) a monoglycerin fatty acid ester;
(C) water ;
(D) a dicarboxylic acid polyglycerol ester; and
(E) a dicarboxylic acid diester having a total carbon number of 14 to 20 ,
The (B) monoglycerin fatty acid ester is
A fatty acid including a linear saturated fatty acid, a branched saturated fatty acid, and an aliphatic dicarboxylic acid;
and glycerin ,
The (D) dicarboxylic acid polyglycerol ester is an esterification reaction product of polyglycerol formed by dehydration condensation of a plurality of glycerol molecules and only dicarboxylic acid,
A composition for external use on the skin, in which the mass ratio [(E)/(A)] of the dicarboxylic acid diester (E) having a total carbon number of 14 to 20 to the ultraviolet absorber (A) containing at least a methoxycinnamate ester is 0.1 or more and 0.5 or less . The skin topical composition according to claim 1 , comprising 2% by mass or more and 10% by mass or less of the (E) dicarboxylic acid diester having a total carbon number of 14 to 20 . The skin topical composition according to claim 1 or 2 , wherein the (E) dicarboxylic acid diester having a total carbon number of 14 to 20 is a diester compound in which a monohydric alcohol having a carbon number of 2 to 6 is ester-bonded to sebacic acid . The composition for external use on the skin according to claim 1 , which is a cosmetic preparation for preventing sunburn.