JP6359947B2 - Sunscreen cosmetics - Google Patents

Description

  The present invention relates to a sunscreen cosmetic.

Ultraviolet rays are broadly classified into UV-A (wavelengths 320 nm to 400 nm), UV-B (wavelengths 280 nm to 320 nm), and UV-C (wavelengths 190 nm to 280 nm), and it is known that ultraviolet rays of any wavelength cause skin deterioration. It has been.
As means for protecting the skin from ultraviolet rays, there are two means: shielding ultraviolet rays and spectrally absorbing ultraviolet rays.
As a means for shielding ultraviolet rays, use of inorganic powders such as titanium oxide and zinc oxide can be mentioned.
Further, as a means for spectrally absorbing ultraviolet rays, use of an organic ultraviolet absorber can be mentioned, and as the organic ultraviolet absorber, for example, t-butoxybenzoylmethane is generally known.

As an example of a cosmetic that protects the skin from ultraviolet rays, a sunscreen composition containing sukumetite, associative polyurethane, octyl methoxycinnamate, titanium dioxide, and zinc oxide is disclosed (for example, see Patent Document 1).
In addition, the size of the pores of the capsule wall membrane changes in response to the amount of ultraviolet irradiation, photoresponsive microcapsules that release drugs such as encapsulated UV absorbers, and UV absorbers that use microcapsules, etc. Sunscreen cosmetics that are excellent in the durability and safety of these drugs have been proposed (see, for example, Patent Document 2).

JP 2012-102060 A JP-A-5-9107

In recent years, it has been known that not only UV-B but also UV-A affects the dermis and promotes the generation of wrinkles. Therefore, development of a technique for absorbing or shielding UV-A is desired. .
One method for shielding long-wavelength ultraviolet rays such as UV-A is to use a large amount of inorganic powder as described in Patent Document 1, but when applied to the skin, May occur.
On the other hand, when a long wavelength ultraviolet ray is spectrally absorbed by an organic ultraviolet absorber, a compound having a molecular structure having a long conjugate length is preferably used. However, compounds having excellent long-wavelength ultraviolet absorptivity are often hydrophobic compounds due to the molecular structure as described above. For this reason, when a hydrophobic ultraviolet absorber is used in cosmetics, it is likely to precipitate over time, and the temporal stability of the cosmetics may not be sufficient.

  As described in Patent Document 2, the stability of the ultraviolet absorber is improved by encapsulating the ultraviolet absorber in the photoresponsive microcapsule. However, the capsule used in Patent Document 2 contains a polymer containing a triphenylmethane compound in the wall film, and the capsule wall film is hydrophobic. Therefore, although the photoresponsive microcapsule described in Patent Document 2 is suitable for blending into an oily base, aggregation may occur when blended in a cosmetic containing water.

  The subject of this invention is providing the sunscreen cosmetics which have the absorption ability with respect to UV-A and UV-B, precipitation of the ultraviolet absorber with time is suppressed, and are excellent in a usability | use_condition.

Means for solving the problems include the following embodiments .
[1] The following (A) to (E) are contained, the content of the following (B) with respect to the total amount of the sunscreen cosmetic is 1% by mass to 3% by mass, and the following with respect to the total amount of the sunscreen cosmetic ( A sunscreen cosmetic in which the total content of the ester oil containing D) is 1% by mass or more and 10% by mass or less.
(A): As a UVA absorber , methylenebisbenzotriazolyltetramethylbutylphenol, bisethylhexyloxyphenol methoxyphenyltriazine, 4-tert-butyl-4′-methoxydibenzoylmethane, and diethylaminohydroxybenzoyl hexyl benzoate At least one compound (B) selected from the group : as a UVB absorber, 2-ethylhexyl paramethoxycinnamate, isopropyl methoxycinnamate, para-aminobenzoic acid, ethyl para-aminobenzoic acid, ethyl-dihydroxypropyl Para-aminobenzoic acid, ethylhexyl-dimethyl para-aminobenzoic acid, homosalate, ethylhexyl salicylate, 3-benzylidene camphor, 4-methylbenzylidene camphor, benzylidene Camphorsulfonic acid, camphor sulfate benzalkonium methosulfate, polyacrylamide methylbenzylidene camphor, diethylhexylbutamide triazone, 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5- At least one compound (C) selected from the group consisting of triazine, disodium phenyldibenzimidazole tetrasulfonate, polyorganosiloxane having a benzalmalonate functional group, and octocrylene : containing at least one DNA and irradiating with light A photoresponsive capsule (D) comprising a wall membrane that is at least partially decomposed by the oil and an oil-soluble antioxidant component encapsulated in the wall membrane: lauroyl sarcosine isopropyl, caprylic / capric triglyceride, diisopropyl sebacate, and SE At least one 20 ° C. with an ester oil liquid is selected from the group consisting of thin diethyl (E): Water [2] U VB absorbers, tanning according to solid compounds [1] at 20 ° C. Stop cosmetics.
[3] The content of the light-responsive capsule, sunscreen cosmetic according to relative to the content of UVB absorber, is less than 10 times 0.001 times by weight [1] or [2].
[4] The sunscreen cosmetic according to any one of [1] to [3], wherein the content of the UVA absorber is 0.1% by mass or more based on the total amount of the cosmetic.
[5] The sunscreen makeup according to any one of [1] to [4], wherein the content of the photoresponsive capsule is 0.0001% by mass to 5% by mass with respect to the total amount of the cosmetic. Fee.
[6] The oil-soluble antioxidant component included in the wall membrane of the photoresponsive capsule is (1) a compound group consisting of tocopherol and its derivative, (2) a compound group consisting of an oil-soluble ascorbic acid derivative, and (3 The sunscreen cosmetic according to any one of [1] to [5], which is at least one compound selected from the group consisting of retinol and derivatives thereof.

  ADVANTAGE OF THE INVENTION According to this invention, it has the absorptivity with respect to UV-A and UV-B, precipitation of the ultraviolet absorber with time is suppressed, and the sunscreen cosmetics excellent in a usability | use_condition can be provided.

The sunscreen cosmetic of the present invention contains the following (A) to (E), the content of the following (B) with respect to the total amount of the sunscreen cosmetic is 1% by mass to 3% by mass, and the sunscreen It is a sunscreen cosmetic in which the total content of the ester oil including the following (D) with respect to the total amount of the cosmetic is 1% by mass to 10% by mass.
(A): UVA absorber (B): UVB absorber (C): wall film containing at least one DNA and at least partially decomposing by light irradiation, and an oil-soluble antioxidant component contained in the wall film And at least one ester oil that is liquid at 20 ° C. selected from the group consisting of lauroyl sarcosine isopropyl, caprylic acid / capric acid triglyceride, diisopropyl sebacate, and diethyl sebacate (D) E): Water Hereinafter, the sunscreen cosmetics may be simply referred to as “cosmetics”.

In the present specification, a numerical range indicated using “to” indicates a range including the numerical values described before and after “to” as the minimum value and the maximum value, respectively.
Further, in the present specification, the amount of each component in the cosmetic is the total amount of the plurality of substances present in the cosmetic unless otherwise specified, when there are a plurality of substances corresponding to each component in the cosmetic. Means.

In this specification, the UVA absorber refers to a compound having an absorption ability of ultraviolet rays UV-A (wavelength: 320 nm to 400 nm).
The UVB absorber refers to a compound having an absorption ability of ultraviolet rays UV-B (wavelength 280 nm to 320 nm).
The long wavelength ultraviolet rays in this specification refer to UV-A, that is, ultraviolet rays having a wavelength of 320 nm to 400 nm.
In the present specification, a photoresponsive capsule containing at least one kind of DNA and comprising a wall membrane that is at least partially decomposed by light irradiation and an oil-soluble antioxidant component contained in the wall membrane is referred to as “specific photoresponse”. `` Capable capsule '', at least one ester oil that is liquid at 20 ° C. selected from the group consisting of lauroyl sarcosine isopropyl, caprylic / capric triglyceride, diisopropyl sebacate, and diethyl sebacate as “specific ester oil”, Each may be referred to.

  The sunscreen cosmetic of the present invention has the above composition, and thus has a UV-A and UV-B absorption ability, and is a cosmetic with excellent temporal stability in which precipitation of an ultraviolet absorber is suppressed. Since the content of the ester oil including the ester oil can be suppressed to a low level, the cosmetic is excellent in use feeling while maintaining the absorption ability for UV-A and UV-B.

Although the mechanism of action of the present invention is not clear, it is presumed as follows.
The specific photoresponsive capsule containing the oil-soluble antioxidant component contained in the sunscreen cosmetic of the present invention has UV-B absorption ability. For this reason, the cosmetics of this invention can maintain favorable UVB absorptivity even if content of a UVB absorber is reduced by including a specific photoresponsive capsule. By reducing the content of the UVB absorber, the total content of ester oil required for solubilization of the UVB absorber and UVA absorber can be reduced, and the total content of ester oil in the cosmetics can be reduced. Even if the amount is small, precipitation of the UVA absorber and the UVB absorber is suppressed, and the cosmetic composition has good temporal stability. Furthermore, by reducing the total content of the ester oil, the stickiness caused by the ester oil when the cosmetic of the present invention was applied to the skin was suppressed, and a cosmetic with excellent usability was achieved. Estimated.
In addition to the function of UVB absorption capability, the specific photoresponsive capsule contains at least one kind of DNA in the capsule wall membrane, and the DNA contained in the wall membrane has a function of being at least partially decomposed by light irradiation. Therefore, the cosmetic containing the specific photoresponsive capsule can improve the familiarity with the skin due to the DNA contained in the wall film. Furthermore, depending on the irradiation amount of sunlight or the irradiation amount of ultraviolet rays other than sunlight, at least a part of the wall film of the specific photoresponsive capsule is decomposed and oil-soluble so that it is stably contained in the capsule. Since the antioxidant component is gradually released out of the capsule and applied to the skin, the effect of the oil-soluble antioxidant component can be maintained for a long period of time.
The present invention is not limited to the above description.

In the present invention, “stability with time” means that, when a cosmetic is produced and time passes, changes in physical properties of the cosmetic are suppressed. Examples of changes in physical properties in the cosmetic of the present invention include generation of precipitates of UVA absorber, change in dispersion state when the cosmetic is a dispersion, and the like.
Unless otherwise specified, “room temperature” in this specification means 20 ° C.

  Hereafter, each component used for the cosmetics of this invention is demonstrated one by one.

[UVA absorber]
The cosmetic of the present invention contains a UVA absorber. The UVA absorber is a compound having a maximum absorption at a wavelength of 320 nm to 400 nm, and is preferably a solid compound at 20 ° C.
The UVA absorber being a compound that is solid at 20 ° C. means that the UVA absorber itself is solid under normal temperature and normal pressure (20 ° C., 1 atm).

As the UVA absorber, a compound having a maximum absorption at 320 nm to 400 nm among the ultraviolet absorbers shown below can be used.
Triazine-based ultraviolet absorbers (for example, bisresorcinyl triazine, more specifically, bisethylhexyloxyphenol methoxyphenyl triazine (2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] phenyl}) -6- (4-Methoxyphenyl) 1,3,5-triazine, commercially available products are Tinosolve (registered trademark) S, BASF Japan , 2- [2-hydroxy-4- (2-ethylhexyl) phenoxy] -2H -Benzotriazole and the like;
Benzoic acid UV absorbers (e.g., para-aminobenzoic acid (hereinafter, sometimes referred to as PABA) mono glycerol ester, N, N-dipropoxy PABA ethyl ester, N, N-diethoxy PABA ethyl ester, N, N-dimethyl PABA ethyl ester, N, N-dimethyl PABA butyl ester, etc.);
Anthranilic acid-based ultraviolet absorbers (for example, homomenthyl-N-acetylanthranilate, etc.);
Salicylic acid-based ultraviolet absorbers (for example, amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate);
Cinnamic acid UV absorbers (such as octyl cinnamate, ethyl-4-isopropyl cinnamate, ethyl-2,4-diisopropyl cinnamate, methyl-2,4-diisopropyl cinnamate, shea Kurohekishiru -p- methoxycinnamate Ethyl-α-cyano-β-phenylcinnamate, 2-ethylhexyl-α-cyano-β-phenylcinnamate, etc.);
Benzophenone-based ultraviolet absorbers (for example, 2- [4- (diethylamino) -2-hydroxybenzoyl] benzoic acid hexyl ester (also known as: diethylaminohydroxybenzoyl hexyl benzoate, commercially available ubinal (registered trademark) A Plus Granular, BASF Japan), 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2 ', 4,4'-tetrahydroxy Benzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4′-methylbenzophenone, 4-phenylbenzophenone, 2-ethylhexyl-4′-phenyl-benzophenone-2-carboxylate, 2-hydroxy Proxy -4-n-octoxybenzophenone, 4-hydroxy-3-carboxy benzophenone);
3- (4′-methylbenzylidene) -d, l-camphor, 3-benzylidene-d, l-camphor; 2-phenyl-5-methylbenzoxazole; 2,2′-hydroxy-5-methylphenylbenzotriazole; 2- (2'-hydroxy-5'-t-octylphenyl) benzotriazole; 2- (2'-hydroxy-5'-methylphenylbenzotriazole;dibenzalazine;dianisoylmethane;4-methoxy-4'-t- Butyl dibenzoylmethane; 5- (3,3-dimethyl-2-norbornylidene) -3-pentan-2-one;
Phenyl acrylate ultraviolet absorbers (for example, 2-ethylhexyl-2-cyano-3,3-diphenyl acrylate (also known as octocreline), 2-ethyl-2-cyano-3,3-diphenyl acrylate);
Dibenzoylmethane-based ultraviolet absorbers (for example, 4-tert-butyl-4′-methoxydibenzoylmethane, etc.);
Camphor derivatives (eg, 4-methylbenzylidene camphor, terephthalidene dicamphor sulfonic acid, etc.);
Phenylbenzotriazole derivatives (for example, hydroxy- (ethylhexyl) phenoxybenzotriazole, methylenebisbenzotriazolyltetramethylbutylphenol (Tinosolve (registered trademark) M, BASF Japan Ltd. as a commercial product));
Examples thereof include benzalmalonate derivatives (for example, dimethicobenzalmalonate).

Among these, bisethylhexyloxyphenol methoxyphenyltriazine , 2- [2-hydroxy-4- (2-ethylhexyl) phenoxy] -2H-benzotriazole, t-butylmethoxydi is preferable in terms of good UVA absorption ability. Benzoylmethane, methylenebisbenzotriazolyl tetramethylbutylphenol, diethylaminohydroxybenzoyl hexyl benzoate and the like are preferable, methylenebisbenzotriazolyltetramethylbutylphenol, bisethylhexyloxyphenol methoxyphenyltriazine, 4-tert-butyl-4'- At least one compound selected from methoxydibenzoylmethane (t-butylmethoxydibenzoylmethane) and hexyl diethylaminohydroxybenzoylbenzoate More preferably.
In particular, methylenebisbenzotriazolyltetramethylbutylphenol (Tinosolve (registered trademark) M, manufactured by BASF Japan, maximum absorption wavelength: 360 nm), bisethylhexyl from the viewpoint of good UVA absorption ability and easy availability. Oxyphenol methoxyphenyl triazine (Tinosolve (registered trademark) S, manufactured by BASF Japan, maximum absorption wavelength: 340 nm), hexyl diethylaminohydroxybenzoyl benzoate (Ubinal (registered trademark) A Plus Granular, manufactured by BASF Japan, maximum absorption wavelength: 355 nm) is more preferable.

The cosmetic of the present invention may contain only one type of UVA absorber or two or more types.
What is necessary is just to determine the content of the UVA absorber in the cosmetics of this invention according to the kind of UVA absorber to be used, and an ultraviolet-ray absorption ability. For example, the UVA absorber is preferably contained in an amount of 0.1% by mass or more, more preferably 0.3% by mass or more, based on the total amount of the cosmetic.
What is necessary is just to determine the upper limit of content of a UVA absorber by the mixing | blending upper limit to the pharmaceutical and cosmetics prescribed | regulated to each compound.
For example, in cosmetics, the upper limit for the incorporation of hexyl diethylaminohydroxybenzoyl benzoate, which is a UVA absorber, is set at 10% by mass with respect to the total amount of cosmetics, and the upper limit for the incorporation of bisethylhexyloxyphenol methoxyphenyl triazine. Is defined as 3% by mass with respect to the total amount of the cosmetic.
In addition, even if it is made to contain with the content of the upper limit of the blending using a single UVA absorber, if the intended ultraviolet shielding ability is difficult to obtain, the intended ultraviolet shielding ability is achieved using a plurality of UVA absorbers. May be.
When the content of the UVA absorber is in the above range, sufficient UVA absorption ability is obtained, and precipitation of the UVA absorber with time is suppressed.

[UVB absorber]
The cosmetic of the present invention contains a UVB absorber. The UVB absorber is a compound having a maximum absorption at a wavelength of 280 nm to 320 nm.
There is no limitation in particular in the UVB absorber used for the cosmetics of this invention, The compound which has maximum absorption in 280 nm-320 nm among the ultraviolet absorbers shown below generally used for cosmetics can be used.
Examples of the UVB absorbent that can be used in the present invention include 2-methoxyhexyl paramethoxycinnamate (octylmethoxycinnamate), isopropyl methoxycinnamate, and para-aminobenzoic acid (hereinafter referred to as “PABA”). ), Ethyl PABA, ethyl-dihydroxypropyl PABA, ethylhexyl-dimethyl PABA, homosalate, ethylhexyl salicylate, 3-benzylidene camphor, 4-methylbenzylidene camphor, benzylidene camphor sulfonic acid, camphor benzalkonium methosulfate, polyacrylamide methylbenzylidene Camphor, diethylhexylbutamide triazone, 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine, phenyldiben Tetrasulfonate disodium polyorganosiloxane having benzalmalonate functional groups, octocrylene, and the like.
The UVB absorber in the present invention is preferably a compound that is solid at 20 ° C. from the viewpoint of feeling of use. The UVB absorber being solid at 20 ° C. means that the UVB absorber itself is solid under normal temperature and normal pressure (20 ° C., 1 atm).
Among these, as the UVB absorber, a solid compound at 20 ° C. selected from PABA and PABA derivatives is preferable.

The cosmetic of the present invention may contain only one type of UVB absorber or two or more types.
The content of the UVB absorber in the cosmetic of the present invention is 1% by mass or more and 3% by mass or less based on the total amount of the cosmetic. If the content of the UVB absorber is less than 1% by mass, sufficient UVB shielding ability may not be obtained.
What is necessary is just to determine suitably content of the UVB absorber in the cosmetics of this invention in the said range according to the objective.
When the content of the UVB absorber in the cosmetic is within the above preferable range, the UVB absorption ability, the feeling of use of the cosmetic, and the stability are further improved.

[Photoresponsive capsule containing at least one kind of DNA, and a wall membrane that is at least partially decomposed by light irradiation, and an oil-soluble antioxidant component contained in the wall membrane: specific photoresponsive capsule]
The cosmetic of the present invention contains a specific photoresponsive capsule.
The particle size of the specific photoresponsive capsule can be selected as necessary. The particle size of the specific photoresponsive capsule can be appropriately selected within a range of, for example, 10 nm to 100 μm. For the particle size of the specific photoresponsive capsule, a normal particle size measuring means can be used. For example, if the particle size of the specific photoresponsive capsule is in the range of 10 nm to 1 μm, it can be measured by FPAR-1000 (manufactured by Otsuka Electronics), and if the particle size is in the range of 1 μm to 100 μm, LA-920 (Horiba) (Manufactured by Seisakusho).
Since the specific photoresponsive capsule has UVB absorption ability, the content of the UVB absorber contained in the cosmetic can be reduced while maintaining the UVB absorption ability by containing the specific photoresponsive capsule. .

-Wall membrane-
The wall film of the specific photoresponsive capsule is made of electromagnetic waves contained in sunlight (electromagnetic waves having a wavelength within the wavelength of the solar radiation spectrum) or ultraviolet rays contained in light other than sunlight, for example, fluorescent light. It is a wall film that can express a light responsiveness that at least a portion is decomposed by the action.
The specific photo-responsive capsule contains at least one deoxyribonucleic acid (DNA) that is decomposed by light irradiation on the wall film, so that a part of the wall film is decomposed by light irradiation, particularly ultraviolet light irradiation, and an opening portion As a result, oil-soluble antioxidant components encapsulated in the specific photoresponsive capsule are released out of the specific photoresponsive capsule.

The wall film of the specific photoresponsive capsule contains at least one DNA, and at least a part of the DNA contained in the wall film is decomposed by irradiation with light such as sunlight, and an opening is formed in the decomposed part of the wall film. By being formed, the encapsulated oil-soluble antioxidant component is released out of the capsule. When energy is applied to a specific photoresponsive capsule by light irradiation in the presence of oxygen, free radicals are generated in the region irradiated with light, and the generated free radicals cleave DNA molecules, It is considered that a part of the wall film is decomposed by the cleavage.
Known photodegradable polymers include, for example, polyethylene having a photodegradable partial structure, butadiene styrene copolymer having a photodegradable partial structure, etc. Although there are examples of use, these photodegradable polymers are In order to decompose, when exposed to sunlight, energy exceeding 500,000 kJ / m ² is required. This amount of energy corresponds to the amount of exposure to sunlight for 15 days or more in fine weather.
On the other hand, the wall film of a specific photoresponsive capsules used in the present invention, preferably, 200 kJ / ^{m 2} or more, more preferably if 4000kJ / ^{m 2} or more energy imparted, decomposition is started, cosmetics In use, it has a photoresponsive property that is practically preferable.

  The DNA contained in the wall film of the specific photoresponsive capsule is not particularly limited, and may be a DNA derived from a natural product or a synthetic DNA. Examples of the natural product-derived DNA include marine product-derived DNA, plant-derived DNA, and the like, from the viewpoint of easy availability, marine product-derived DNA is preferred, and fish extract-derived DNA is more preferred. .

-Oil-soluble antioxidant component-
There is no particular limitation on the oil-soluble antioxidant component included in the specific photoresponsive capsule, and any oil-soluble antioxidant component that can be used in cosmetics can be used.
As an oil-soluble antioxidant component, from the viewpoint of easy encapsulation in capsules, UVB absorption ability, etc., (1) a compound group consisting of tocopherol and its derivatives, (2) a compound group consisting of oil-soluble ascorbic acid derivatives And (3) one or more compounds selected from the group of compounds consisting of retinol and derivatives thereof are preferred.

(1) The compound group consisting of tocopherol and its derivatives includes tocophenol and its esters, and tocotrienol and its esters. Specifically, dl-α-tocopherol, dl-β-tocopherol, dl-γ-tocopherol, dl-δ-tocopherol, dl-α-tocopherol acetate, nicotinic acid-dl-α-tocopherol, linoleic acid-dl- In addition to α-tocopherol, dl-α-tocopherol succinate and the like, α-tocotrienol, β-tocotrienol, γ-tocotrienol, δ-tocotrienol, and acetates thereof are included.
Among these, tocopherol, tocopherol acetate, tocopherol succinate or tocotrienol is preferable from the viewpoint of release from the capsule.

(2) Examples of the compound group consisting of oil-soluble ascorbic acid derivatives include ascorbyl stearate, 2-glucoside L-ascorbic acid, ascorbyl palmitate, ascorbyl tetraisopalmitate, ascorbyl tetrahexyldecanoate, ascorbyl acetate, and the like.
Of these, from the viewpoint of release from the capsule, ascorbyl tetrahexyldecanoate (VCIP), ascorbyl palmitate, ascorbyl stearate, or ascorbyl acetate is preferred.

(3) The compound group consisting of retinol and its derivatives includes retinol; retinol fatty acid ester, palmitic acid retinol ester, propionic acid retinol ester; 3-hydroretinol; retinal, 3-hydroretinal; retinoic acid, 3-dehydro. Examples thereof include retinoic acid.
Among these, retinol, palmitic acid retinol ester, or propionic acid retinol ester is preferable from the viewpoint of release from the capsule.

The oil-soluble antioxidant component encapsulated in the specific photoresponsive capsule may be used alone or in combination of two or more.
In particular, from the viewpoint of UVB absorption ability, it is preferable to contain two or more oil-soluble antioxidant components. Preferred combinations when two or more oil-soluble antioxidant components are used include, for example, (1) tocopherol and its derivatives (particularly tocopherol) and (2) an oil-soluble ascorbic acid derivative (particularly tetrahexyldecanoate ascorbyl). Combinations are listed.

-Preparation of specific photoresponsive capsules-
The photoresponsive capsule is prepared by dissolving high molecular weight DNA in an aqueous sodium carbonate solution and stirring sufficiently to prepare a gel-like high molecular weight DNA solution.
A wall membrane composed of high molecular weight DNA on the periphery of an oil-soluble antioxidant component by adding an oil-soluble antioxidant component to be encapsulated in a gel-like high molecular weight DNA solution, applying a shearing force using a dispersing device Preparing a dispersion of capsules having
Separating the capsule from the reaction solvent by centrifugation,
Washing the resulting capsule; and
If desired, the capsule can be dried by a production method.
The wall membrane containing DNA used in the photoresponsive capsule is described in JP-A No. 2004-203852, and an oil-soluble antioxidant component is included in the wall membrane described in JP-A No. 2004-203852. Thus, the specific photoresponsive capsule according to the present invention can be obtained. With reference to the description in Japanese Patent Application Laid-Open No. 2004-203852, the wall film of the photoresponsive capsule in the present invention can be manufactured.

The specific photoresponsive capsule is also available as a commercial product, and examples thereof include C00013 SMARTTVECTOR UV CE (trade name, manufactured by BASF).
C00013 SmartVectorUV CE is a specific photoresponsive capsule containing a wall membrane containing DNA derived from a fish extract, and 1.25% by mass of tocopherol and ascorbyl tetrahexyldecanoate (VCIP) contained in the wall membrane, An aqueous dispersion containing 5% by mass.

The composition of C00013 SMARTTECTOR UV CE (trade name), which is a commercial product, is shown below.

・ Water (dispersion medium) 69.7% by mass
・ Butylene glycol (BG) 20% by mass
・ Propylene glycol (PG) 5% by mass
Tri (caprylic acid / capric acid) glyceryl 2.4937 mass% (inclusion)
・ Tocopherol 1.25% by mass (inclusion)
-Ascorbyl tetrahexyldecanoate (VCIP) 1.25% by mass (inclusion)
・ Carbomer (carboxy vinyl polymer) 0.3% by mass
・ DNA 0.0063 mass% (wall membrane)

The specific photoresponsive capsule in the present invention is not limited to the above-described example.
The cosmetic of the present invention may contain only one type of specific photoresponsive capsule, or may contain two or more types.
The content of the specific photoresponsive capsule in the cosmetic of the present invention may be appropriately determined from the viewpoint of giving sufficient UVB absorption ability to the cosmetic and the stability of the cosmetic.
Specifically, the content of the specific photoresponsive capsule in the cosmetic of the present invention is 0.001 to 10 times on a mass basis with respect to the content of the UVB absorber contained in the cosmetic of the present invention. It is preferable from a viewpoint of UVB absorption ability, and it is more preferable that they are 0.1 times or more and 10 times or less.
Moreover, 0.0001 mass%-5 mass% are preferable at solid content, and, as for content of the specific photoresponsive capsule with respect to the cosmetics total mass of this invention, 0.0003 mass%-1.0 mass% are more preferable.

[Ester oil liquid at 20 ° C. selected from the group consisting of lauroyl sarcosine isopropyl, caprylic / capric triglyceride, diisopropyl sebacate, and diethyl sebacate: specific ester oil]
The cosmetic of the present invention is at least one 20 selected from the group consisting of lauroyl sarcosine isopropyl, caprylic acid / capric acid triglyceride (also known as tri (capryl / capric acid) glyceryl), diisopropyl sebacate, and diethyl sebacate. Contains ester oil that is liquid at 0C.
In this specification, being an ester oil that is liquid at 20 ° C. means an ester oil having a melting point or softening point of less than 20 ° C.
A specific ester oil is excellent in the solubility of ultraviolet absorbers, such as a UVA absorber and a UVB absorber.
Of these, tri (capryl / capric acid) glyceryl is preferable from the viewpoint of feeling of use such as non-stickiness.

A commercial product may be used as the specific ester oil.
The cosmetic of the present invention may contain only one type of specific ester oil, or may contain two or more types.

The cosmetic of the present invention may contain an ester oil other than the specific ester oil (hereinafter, may be referred to as other ester oil) in addition to the specific ester oil, as long as the effects of the present invention are not impaired. . Other ester oils are not particularly limited as long as they are ester oils that can be applied to cosmetics. The other ester oil is preferably an ester oil that is liquid at 20 ° C.
Other ester oils that can be used in the cosmetic of the present invention include, for example, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, Hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, monoisostearic acid N -Alkyl glycol, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, tri-2-ethylhexanoic acid tri Tyrolpropane, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, glycerin tri-2-ethylhexanoate, glycerin trioctanoate, glycerin triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethyl Hexanoate, 2-ethylhexyl palmitate, glyceryl trimyristate, glyceride tri-2-heptylundecanoate, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N -Lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexa sebacate Le, myristic acid 2-hexyl decyl palmitate, 2-hexyldecyl, 2-hexyldecyl adipate, 2-ethylhexyl succinate, and triethyl citrate.
As other ester oils, commercially available products may be used.

When the cosmetic of the present invention contains other ester oil, the other ester oil may contain only one type or two or more types.
The total content of the specific ester oil in the cosmetic composition of the present invention and other ester oils optionally contained is that the solubility of the UVA absorber and the UVB absorber is good, with respect to the total cosmetic amount, It is 1 mass% or more and 10 mass% or less.
The total content of the ester oil is preferably 1% by mass or more and 8% by mass or less, and more preferably 1% by mass or more and 5% by mass or less.

  Since the cosmetic of the present invention contains the specific photoresponsive capsule having UVB absorption ability, the content of the UVB absorber can be 1 mass% or more and 3 mass% or less. Therefore, even when the total content of the ester oil including the specific ester oil is 10% by mass or less, the precipitation of the UVA absorber and the UVB absorber accompanying the decrease in the ester oil content is suppressed, and the cosmetic has excellent stability. It becomes.

When only specific ester oil is included as ester oil, content of specific ester oil with respect to cosmetics whole quantity is 1 mass% or more and 10 mass% or less.
When the cosmetic of the present invention contains a specific ester oil and another ester oil, the content of the other ester oil is preferably 70% by mass or less, and 50% by mass with respect to the total amount of the ester oil. % Or less is more preferable. Further, as described above, it is also a preferable aspect that no other ester oil is contained as the ester oil.

〔water〕
The cosmetic of the present invention contains water.
The water used in the cosmetic of the present invention is not particularly limited as long as it can be applied to cosmetics, and any water can be used.
Examples of water include ultrapure water such as natural water, purified water, distilled water, ion exchange water, pure water, and milli-Q water. Note that Milli-Q water is ultrapure water obtained by a Milli-Q water production apparatus, which is an ultrapure water production apparatus manufactured by Merck Millipore.
Among these, purified water, distilled water, ion-exchanged water, pure water, milli-Q water, and the like are preferable from the viewpoint of few impurities as water used in the cosmetic of the present invention.
The content of water in the cosmetic of the present invention is preferably 30% by mass to 99% by mass, more preferably 40% by mass to 90% by mass, and more preferably 60% by mass with respect to the total amount of the cosmetic from the viewpoint of feeling of use. % To 80% by mass is preferable.
When the cosmetic of the present invention is an oil-in-water emulsion cosmetic, the specific ester oil is a component contained in the oil phase. When the specific photoresponsive capsule is contained in the cosmetic as an aqueous dispersion, it may be included in the aqueous phase in advance. After preparing the oil-in-water emulsion composition, the specific photoresponsive capsule is added to the emulsion composition. May be.

[Other ingredients]
The cosmetic of the present invention can contain other components as needed as long as the effects of the present invention are not impaired, in addition to the above components and other ester oils optionally contained.
Other components are the above components contained in the cosmetic of the present invention, and components that do not correspond to other ester oils.

  Examples of other components include oily components other than ester oils (hereinafter sometimes referred to as other oily components), surfactants, colorants, and other additives.

(Other oily ingredients)
Examples of the oil component other than the ester oil that can be contained in the cosmetic of the present invention include an oil component appropriately selected from various oils that can be applied to the cosmetic.
Specific examples of other oil components include functional oils such as squalane, hydrocarbon oils such as liquid paraffin; dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, higher alcohol modification Examples include silicone oils such as organopolysiloxanes; fluorine-containing oils such as fluoropolyethers and perfluoroalkyl ether silicones; vegetable oils such as olive oil and jojoba oil; and animal oils such as liquid lanolin.

(Surfactant)
The cosmetic of the present invention can contain a surfactant.
The surfactant may be any of an anionic surfactant, a cationic surfactant, and an amphoteric surfactant, an ionic surfactant and a nonionic surfactant.
Examples of the ionic surfactant include alkyl sulfonate, alkyl sulfate, monoalkyl phosphate, lecithin and the like. Examples of nonionic surfactants include sorbitan fatty acid ester, glycerin fatty acid ester, organic acid monoglyceride, polyglycerin fatty acid ester, propylene glycol fatty acid ester, polyglycerin condensed ricinoleic acid ester, sucrose fatty acid ester, polyethylene glycol fatty acid ester, Polyoxyethylene alkyl ether, polyoxypropylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene propylene Glycol fatty acid ester, polyoxyethylene castor oil, polyoxyethylene hardened Mention may be made of the machine oil, and the like.

(UV-absorbing inorganic powder)
The cosmetic of the present invention can contain an ultraviolet absorbing inorganic powder as long as the effects of the present invention are not impaired.
Examples of the ultraviolet absorbing inorganic powder include inorganic powders such as titanium oxide and zinc oxide. Whether the surface of the inorganic powder is coated or not, it can be used as long as it can be stably dispersed in the cosmetic. The coating agent for coating the inorganic powder may be an inorganic material or an organic material, and may be appropriately selected depending on the cosmetic system to which the inorganic powder is added.

(Polyhydric alcohol)
The cosmetic of the present invention can contain a polyhydric alcohol. By using a polyhydric alcohol, the feeling of use, moisture retention, etc. can be improved.
Examples of the polyhydric alcohol include glycerin, 1,3-butanediol, ethylene glycol, or polysaccharides such as reduced starch syrup, sucrose, erythritol, xylitol, glucose, galactose, sorbitol, maltotriose, trehalose, and the like. Can be mentioned.
When the cosmetics of this invention contain a polyhydric alcohol, it may contain only 1 type and may contain 2 or more types.

(Other ingredients)
The cosmetic can contain other components that are usually used in cosmetics based on the intended use within a range that does not impair the effects of the present invention.
Other components include, for example, water-soluble organic solvents such as ethanol, chelating agents, whitening agents, emollients such as triisodecyl isononanoate, moisturizers, antioxidants, hydrophilic thickeners such as agar, xanthan gum, carbomer, Hydrophilic gelling agents, coloring agents, preservatives, fragrances, various oil components, various aqueous components and the like can be mentioned.

[Cosmetic form]
The form of the cosmetic of the present invention includes (A) to (E) described above, and is particularly limited as long as the content of the UVB absorber and the total content of the ester oil are within the ranges defined in the present invention. Instead, it may be selected as appropriate according to the application.
As a form which the cosmetics of this invention can take, a liquid or solid is mentioned.
The form of the cosmetic of the present invention is preferably an emulsified composition or an aqueous composition from the viewpoint that the feeling of use is good. Among these, an oil-in-water emulsion composition is more preferable.
Examples of the use of the sunscreen cosmetics of the present invention include skin care cosmetics such as skin lotions, cosmetic liquids, emulsions and creams, makeup cosmetics, deodorant cosmetics, and scalp hair cosmetics. Not limited to.

[Production method of sunscreen cosmetics]
The production method of the cosmetic of the present invention can be selected according to the intended form.
For example, when the cosmetic of the present invention is an oil-in-water emulsion composition, it is preferably prepared by the following method.
The oil-in-water emulsified composition in the present invention can be produced by a production method including mixing an oil phase composition containing the above-described components and an aqueous phase composition and emulsifying by a conventional method. .
In the present invention, when the oil phase composition contains at least a UVA absorber, a UVB absorber, and a specific ester oil and optionally contains other ester oil, the other ester oil is used as the oil phase. Included in the composition.
At least water is contained in the aqueous phase composition. When the specific photoresponsive capsule is contained as an aqueous dispersion of the specific photoresponsive capsule, it can be optionally contained in the aqueous phase composition.

When an oil-in-water emulsion composition is prepared by combining an oil phase composition and an aqueous phase composition, the method for preparing the emulsion composition is not particularly limited, and can be performed according to a conventional method.
The ratio of the oil phase composition to the water phase composition in preparing the oil-in-water emulsion is not particularly limited, and the mass ratio of the oil phase / water phase is, for example, 0.1 / 99.9 to 50/50 is preferable, 0.5 / 99.5 to 30/70 is more preferable, and 1/99 to 20/80 is still more preferable.

An example of a manufacturing method will be described more specifically.
First, prepare an aqueous phase composition containing water, an aqueous dispersion of a specific photoresponsive capsule, and an aqueous component such as a nonionic surfactant and a polyhydric alcohol, which are optionally used. Heat to.
An oil phase composition containing components such as UVA absorber, UVB absorber, specific ester oil, and other ester oils, other oil components and emulsifiers used as required is prepared and added to 60 ° C to 90 ° C. Warm up.
Thereafter, the oil phase composition is added to and mixed with the aqueous phase composition, and the shearing force is applied for 3 minutes to 10 minutes with a known shearing force applying device such as a homomixer while maintaining a temperature of 60 ° C to 90 ° C. And the sunscreen cosmetics of this invention which have the form of an oil-in-water emulsion composition can be obtained by performing stirring.
First, an emulsion composition not containing specific photoresponsive capsules was prepared using an aqueous composition not containing specific photoresponsive capsules and the oily composition, and specific photoresponse was added to the obtained emulsion composition. Cosmetics can also be prepared by mixing a dispersion liquid in which a functional capsule is dispersed.

Hereinafter, an example of the method for producing the sunscreen cosmetic of the present invention taking the form of an emulsified composition using the aqueous composition not containing the specific photoresponsive capsule and the oily composition will be described in detail.
For example, a) a water-soluble emulsifier is dissolved in an aqueous medium containing water to obtain an aqueous phase composition, b) an ester oil containing a specific ester oil, a UVA absorber, a UVB absorber, and as needed. Mixing and dissolving other oily components to obtain an oil phase composition, and c) mixing the water phase composition and the oil phase composition with stirring, emulsifying and dispersing by applying shear force An emulsion composition is obtained by a method comprising: obtaining an emulsion composition.

  When applying the shearing force, for example, after emulsification using a normal emulsifying device using a shearing action such as a stirrer, impeller stirring, homomixer, continuous flow type shearing device, etc., two methods are used such as passing through a high-pressure homogenizer. By using the above emulsifying device, stirring device, and the like together, it is possible to make the emulsified particles more uniform in particle size and to further refine the emulsified particles. For the purpose of further homogenizing and refining the particle size of the emulsified particles, the emulsification dispersion may be performed a plurality of times.

The high-pressure homogenizer includes a chamber-type high-pressure homogenizer having a chamber in which a flow path for processing liquid is fixed, and a homogeneous valve-type high-pressure homogenizer having a homogeneous valve.
The homogeneous valve type high-pressure homogenizer can easily adjust the width of the flow path of the treatment liquid, so that the pressure and flow rate during operation can be arbitrarily set, and the operation range is wide, so it is preferably used in the present invention. be able to.
Although the degree of freedom of operation is lower than that of a general-purpose homogenizer, a chamber-type high-pressure homogenizer can be suitably used for applications that require ultra-high pressure because a mechanism for increasing the pressure is easy to make.

Examples of the chamber type high-pressure homogenizer include a microfluidizer (manufactured by Microfluidics), a nanomizer (manufactured by Yoshida Kikai Kogyo Co., Ltd.), an optimizer (manufactured by Sugino Machine Co., Ltd.), and the like.
As the homogeneous valve type high-pressure homogenizer, Gorin type homogenizer (manufactured by APV), Lanier type homogenizer (manufactured by Lanier), high-pressure homogenizer (manufactured by Niro Soabi), homogenizer (manufactured by Sanwa Machinery Co., Ltd.), high-pressure homogenizer ( Izumi Food Machinery Co., Ltd.), ultra-high pressure homogenizer (manufactured by Ika), and the like.

In the present invention, the pressure of the high-pressure homogenizer is preferably 50 MPa or more, more preferably 50 to 250 MPa, still more preferably 100 to 250 MPa.
It is preferable from the viewpoint of maintaining the particle size of the emulsified particles that the emulsified liquid, which is an emulsified and dispersed composition, is cooled through some cooler within 30 seconds immediately after passing through the chamber, preferably within 3 seconds.

  The total content of ester oil in the emulsion composition containing the emulsion particles of the oil phase containing the UVA absorber, UVB absorber, and the ester oil containing the specific ester oil, which are ultraviolet absorbers obtained as described above. The amount is 0.1% by mass to 10% by mass.

5-7.5 is preferable and, as for pH of the cosmetics of this invention, it is more preferable that it is 6.5-7.5.
By setting the pH within the above range, when the cosmetic of the present invention is an emulsion, the storage stability of the emulsion, particularly the storage stability at room temperature, can be improved.

  Hereinafter, the present invention will be described in detail with reference to examples. However, the present invention is not limited to them.

[Examples 1-2, Comparative Examples 1-2]
[Preparation of sunscreen cosmetics]
Using the specific photoresponsive capsule, ultraviolet absorber (UVA absorber and UVB absorber), specific ester oil, and other components at the content (g) shown in Table 1 below, an oil phase composition And an aqueous phase composition was prepared, and the obtained oil phase composition and aqueous phase composition were emulsified by a conventional method to obtain an oil-in-water emulsion composition.

The production method of the oil-in-water emulsion composition will be described more specifically.
First, an aqueous phase composition containing water, a specific photoresponsive capsule, an aqueous gelling agent (Adecanol GT-700: trade name, Asahi Denka Kogyo Co., Ltd.), 1,3-butylene glycol, and methylparaben was prepared. , Heated to 80 ° C. Moreover, UVA absorber, UVB absorber, and specific ester oil were mixed, the oil phase composition was prepared, and it heated at 80 degreeC.
Thereafter, the oil phase composition was mixed with the water phase composition, and while maintaining the temperature at 80 ° C., shear force was applied and stirred for 5 minutes with a homomixer at a rotation speed of 5000 rpm. A cosmetic having the form of an emulsion composition was obtained.

[Evaluation of sunscreen cosmetics]
The following evaluation was performed about the obtained sunscreen cosmetics of Examples and Comparative Examples, and the results are shown in Table 1 below.

(1. Presence or absence of precipitates)
The obtained cosmetic was stored for 1 week under a temperature condition of 25 ° C.
The presence or absence of precipitates in the cosmetic after storage was evaluated.
Applying 0.1 mg to 1 mg of cosmetic material to the slide glass, spreading the cosmetic material to a thickness that allows light to pass through the cover glass, and then optically applying the cosmetic coating film sandwiched between two glass plates Observation with a microscope (350 times) confirmed the presence or absence of precipitates.
The cosmetic coating film was observed under the above conditions, and a sample in which a crystalline precipitate was observed in the cosmetic coating film was evaluated as “precipitating” and a sample in which no precipitate was observed was evaluated as “no precipitation”. .

(2. Ultraviolet (UV-B) shielding ability evaluation)
Based on the in vitro measurement method of ISO 24443, 32.5 mg of the obtained cosmetic was measured as a test sample, and uniformly applied to a polymethyl methacrylate (PMMA) plate (HELIOPLATE HD6) at an application amount of 2 mg / cm ² . A sample for measuring UV-B shielding ability was prepared. Two measurement samples were prepared.
The measurement sample was measured for UV transmittance at a wavelength of 300 nm using an SPF analyzer (manufactured by Labsphere, UV-2000S: trade name), and used as an indicator of UV-B shielding ability. Further, the transmittance value was measured at 5 different locations (n = 5) in two samples, and the arithmetic average value of the measured values at 10 locations was defined as UV-B transmittance. The shielding ability was evaluated.
It shows that the transmittance | permeability of the light in a measurement wavelength is so low that the value of the transmittance | permeability is small, and it is excellent in the shielding capability of UV-B ultraviolet-ray. In addition, rank G1 and rank G2 are the levels which do not have a problem practically as sunscreen cosmetics by the following evaluation criteria.

(Evaluation criteria: UV-B transparency)
G1: Transmittance less than 30% G2: Transmittance between 30% and 60% G3: Transmittance exceeding 60%

(3. Evaluation of cosmetic feel: Stickiness evaluation)
About the obtained cosmetics before light irradiation, the usability | use_condition by 10 expert panels was evaluated.
The cosmetics obtained by 10 professional panels were actually applied to the skin, checked for stickiness when applied, and evaluated according to the following criteria. Note that rank A and rank B are practically good levels according to the following evaluation criteria.
(Evaluation criteria: feeling of use (stickiness))
A: More than 8 out of 10 professional panels answered that there was no stickiness.
B: 6 to 7 out of 10 professional panels answered that there was no stickiness.
C: 4 to 5 out of 10 professional panelists responded that there was no stickiness.
D: 3 or less of 10 professional panels answered that there was no stickiness.

As apparent from Table 1 above, the sunscreen cosmetics of Examples 1 to 2 contain specific photoresponsive capsules, so the content of specific ester oil relative to Comparative Examples 1 to 2, Despite the relatively low content of the UVB absorber, the UVB shielding ability is at a level that causes no problem in practical use, the generation of precipitates over time is not observed, and the feeling in use is excellent.
As shown below, the smart vector is an aqueous dispersion containing 5% by mass of the specific photoresponsive capsule in solid content, and the content of the specific photoresponsive capsule in the cosmetic of Example 1 is 0.5. The content of the specific ester oil is 6% by mass. The content of the specific photoresponsive capsule in the cosmetic of Example 2 is 0.5% by mass, and the content of the specific ester oil is 5% by mass.

Details of the components used in Table 1 and Tables 2 to 6 below are as follows.
(UVA absorber)
T-Butylmethoxydibenzoylmethane: Pulsol (registered trademark) 1789 DSM manufactured by Nutrition Japan KK Diethylaminohydroxybenzoyl hexyl benzoate: Yubinal (registered trademark) A Plus Granular, manufactured by BASF Japan (UVB absorber)
PABA: p-aminobenzoic acid (specific photoresponsive capsule-containing liquid)
Smart vector (C00013 SMARTTVECTOR UV CE, trade name, manufactured by BASF, containing 5% by mass of a specific photoresponsive capsule having a particle size of 10 μm to 90 μm in solid content. In the table, “Smart Vector UV CE” (Abbreviation)
(Specific ester oil)
・ Lauroyl sarcosine isopropyl: Erdeu SL-205 (trade name), manufactured by Ajinomoto Co., Inc. ・ Tri (caprylic acid / capric acid) glyceryl: Coconard (registered trademark) MT, manufactured by Kao ・ Diisopropyl sebacate: IPSE, manufactured by Nippon Seika ( Other ingredients)
GT-700 (Aqueous gelling agent: PEG-240 / decyltetradeceth-20 / HDI (hexamethylene diisocyanate) Copolymer Adecanol GT-700 (trade name), manufactured by ADEKA Corporation Carbomer: Carboxyvinyl polymer (cationic Polymer compound): Carbopol (registered trademark) 980, manufactured by Lubrizol, Inc., BG: 1,3-butanediol, manufactured by Daicel, Methylparaben: Platens M (trade name), manufactured by Ueno

[Examples 3-8, Comparative Examples 3-8]
A sunscreen cosmetic was prepared in the same manner as in Example 1 except that the sunscreen cosmetic formulation was changed to the components and contents (g) shown in Tables 2 to 4 below, and evaluated in the same manner as in Example 1. . The results are shown in Tables 2 to 4 below.

  As apparent from the descriptions in Tables 2 to 4, the cosmetics of Examples 3 to 4 are the cosmetics of Examples 5 to 6 with respect to the cosmetics of Comparative Examples 3 to 4. In contrast to the cosmetics of Comparative Examples 5 to 6, the cosmetics of Examples 7 to 8 are the types of specific ester oils and UVB absorbers, respectively, relative to the cosmetics of Comparative Examples 7 to 8. Even when the content, the type of water-soluble thickener, etc. are different, the content of the specific ester oil and the UVB absorber can be made relatively low with respect to each comparative example. Generation | occurrence | production was not recognized, UVB shielding ability was a level which is satisfactory practically, and was excellent in the usability | use_condition. Moreover, from the results of Example 3 to Example 4 and Example 7 to Example 8, by using tri (caprylic acid / capric acid) glyceryl as the specific ester oil, the reduction effect of the specific ester oil becomes significant. It turns out that a usability is more excellent.

[Examples 9 to 11, Comparative Examples 9 to 14]
A sunscreen cosmetic was prepared in the same manner as in Example 1 except that the formulation of sunscreen cosmetic was changed to the components and contents (g) shown in Tables 5 to 6 below, and evaluated in the same manner as in Example 1. did. The results are shown in Tables 5 to 6 below.

As shown in Table 5, from the results of Comparative Examples 9 to 11, when the content of the specific ester oil contained in the cosmetic is large, precipitation of components contained in the sunscreen cosmetic is suppressed. However, the feeling when used on the skin is poor. As the content of the specific ester oil in the cosmetic is reduced, the feeling of use is improved, but the ingredients of the cosmetic are likely to precipitate, and it is difficult to achieve both the feeling of use and the effect of suppressing the precipitation of ingredients. .
Moreover, in Comparative Example 12 to Comparative Example 14, by reducing the content of the UVB absorber, precipitation of components contained in the cosmetic is suppressed, and the feeling of use is also improved with respect to Comparative Examples 9 to 11. There is a trend. However, it turns out that the UVB shielding ability of cosmetics falls to a practically problematic level, and the function as a sunscreen cosmetic is not sufficient.

On the other hand, as shown in Table 6, since the cosmetics of Examples 9 to 11 contain specific photoresponsive capsules, the content of the UVB absorber is equivalent to that of Comparative Examples 12 to 14. Nevertheless, the UVB shielding ability is at a practically sufficient level. Moreover, precipitation of the component contained in cosmetics is suppressed and it is excellent in the usability | use_condition at the time of applying cosmetics to skin.
It can be seen that the cosmetics of Examples 9 to 11 have a transmittance of light having a wavelength of 350 nm of 60% or less, and have a practically sufficient UVB shielding ability. From this result, it was confirmed that the UVB shielding ability was improved by adding the specific photoresponsive capsule.

  In addition, all the cosmetics of Examples 1 to 11 have UV-A shielding ability.

[Example 12: Sunscreen agent]
Among the following aqueous phase components, the aqueous phase components excluding carbomer were heated to 70 ° C. and stirred, then carbomer was added, mixed with a homomixer, and heated again to 70 ° C.
Separately, the following oil phase components were heated to 70 ° C. and mixed.
Then, the sunscreen agent which has the following composition was prepared by mixing a water phase component and an oil phase component with a homomixer.
<Prescription 1>
[Composition] [Content (% by mass)]
<Oil phase>
・ Cyclopentasiloxane 10.0
Diethylamino hydroxy-benzoyl hexyl benzoate 7.5
Tri (caprylic acid / capric acid) glyceryl 4.0
-HXMT-100ZA (Taika, average primary particle size 15 nm) 3.0
PABA (p-aminobenzoic acid) 1.0
・ PEG-10 Dimethicone 1.0
Polyglyceryl isostearate-10 1.0
<Water phase>
・ 1,3-butylene glycol 4.0
・ SmartVector UV CE 10.0
・ Carbomer 0.3
・ Water-soluble collagen 0.5
・ Hydrolyzed collagen solution (derived from fish) 0.5
N-acetyl-L-hydroxyproline 0.5
・ Astaxanthin-containing emulsion 0.05
・ Lycopene-containing emulsion 0.01
・ Potassium hydroxide 0.05
・ Polyoxyethylene hydrogenated castor oil (60 EO) 0.2
・ Lecithin 0.1
・ Fragrance: Trace amount ・ Methyl paraoxybenzoate 0.15
・ Purified water remaining

[Example 13: Sunscreen agent]
Among the following aqueous phase components, the aqueous phase components excluding carbomer were stirred, carbomer was added, dispersed with a homomixer, and heated again to 70 ° C.
Separately, the following oil phase components were heated to 70 ° C.
Then, the sunscreen agent which has the following composition was prepared by mixing a water phase component and an oil phase component with a homomixer.
<Prescription 2>
[Composition] [Content (% by mass)]
<Oil phase>
・ Cyclopentasiloxane 10.0
・ Methylenebisbenzotriazolyltetramethylbutylphenol 7.5
・ Tri (caprylic / capric) glyceryl 5.0
-HXMT-100ZA (Taika, average primary particle size 15 nm) 3.0
PABA (p-aminobenzoic acid) 1.0
・ PEG-10 Dimethicone 1.0
Polyglyceryl isostearate-10 1.0
<Water phase>
・ 1,3-butylene glycol 4.0
・ SmartVector UV CE 10.0
・ Carbomer 0.3
・ Water-soluble collagen 0.5
・ Hydrolyzed collagen solution (derived from fish) 0.5
N-acetyl-L-hydroxyproline 0.5
・ Astaxanthin-containing emulsion 0.05
・ Lycopene-containing emulsion 0.01
・ Potassium hydroxide 0.05
・ Polyoxyethylene hydrogenated castor oil (60 EO) 0.2
・ Lecithin 0.1
・ Fragrance: Trace amount ・ Methyl paraoxybenzoate 0.15
・ Purified water remaining

[Example 14: Sunscreen agent]
Among the following aqueous phase components, the aqueous phase components excluding carbomer were stirred, carbomer was added, dispersed with a homomixer, and heated again to 70 ° C.
Separately, the following oil phase components were heated to 70 ° C.
Then, the sunscreen agent which has the following composition was prepared by mixing a water phase component and an oil phase component with a homomixer.
<Prescription 3>
[Composition] [Content (% by mass)]
<Oil phase>
・ Cyclopentasiloxane 10.0
Bisethylhexyloxyphenol methoxyphenyl triazine 7.5
・ Diethyl sebacate 5.0
PABA (p-aminobenzoic acid) 1.0
・ PEG-10 Dimethicone 1.0
Polyglyceryl isostearate-10 1.0
<Water phase>
・ 1,3-butylene glycol 4.0
・ SmartVector UV CE 10.0
・ Carbomer 0.3
・ Water-soluble collagen 0.5
・ Hydrolyzed collagen solution (derived from fish) 0.5
N-acetyl-L-hydroxyproline 0.5
・ Astaxanthin-containing emulsion 0.05
・ Lycopene-containing emulsion 0.01
・ Potassium hydroxide 0.05
・ Polyoxyethylene hydrogenated castor oil (60 EO) 0.2
・ Lecithin 0.1
・ Fragrance: Trace amount ・ Methyl paraoxybenzoate 0.15
・ Purified water remaining

[Example 15: Sunscreen agent]
The following oil phase components were dispersed with a disper.
Separately, the following aqueous phase components were mixed and dissolved.
Thereafter, an aqueous phase was added to the oil phase in a homomixer, and further sufficient stirring and mixing were performed in the homomixer to prepare a sunscreen agent having the following composition.
<Prescription 4>
[Composition] [Content (% by mass)]
<Oil phase>
・ Cyclopentasiloxane 15.0
HXMT-100ZA (Taika, average primary particle size 15 nm) 4.0
PEG-9 polydimethylsiloxyethyl dimethicone 4.0
・ Tri (caprylic / capric) glyceryl 5.0
Diethylamino hydroxy-benzoyl hexyl benzoate 3.0
PABA (p-aminobenzoic acid) 2.0
・ Sorbitan sesquiisostearate 1.0
<Water phase>
・ 1,3-butylene glycol 4.0
・ SmartVector UV CE 5.0
・ Water-soluble collagen 0.5
・ Hydrolyzed collagen solution (derived from fish) 0.5
N-acetyl-L-hydroxyproline 0.5
・ Sodium citrate 0.1
・ Polyoxyethylene hydrogenated castor oil (60 EO) 0.2
・ Lecithin 0.1
・ Fragrance: Trace amount ・ Methyl paraoxybenzoate 0.15
・ Astaxanthin-containing emulsion 0.05
・ Lycopene-containing emulsion 0.01
・ Purified water remaining

Claims (6)

Containing (A) to (E) below,
The content of the following (B) with respect to the total amount of the sunscreen cosmetics is 1% by mass or more and 3% by mass or less, and the total content of the ester oil containing the following (D) with respect to the total amount of the sunscreen cosmetics is 1% by mass or more. A sunscreen cosmetic that is 10% by mass or less.
(A): As a UVA absorber, methylenebisbenzotriazolyltetramethylbutylphenol, bisethylhexyloxyphenol methoxyphenyltriazine, 4-tert-butyl-4′-methoxydibenzoylmethane, and diethylaminohydroxybenzoyl hexyl benzoate At least one compound (B) selected from the group: as a UVB absorber, 2-ethylhexyl paramethoxycinnamate, isopropyl methoxycinnamate, para-aminobenzoic acid, ethyl para-aminobenzoic acid, ethyl-dihydroxypropyl Para-aminobenzoic acid, ethylhexyl-dimethyl para-aminobenzoic acid, homosalate, ethylhexyl salicylate, 3-benzylidene camphor, 4-methylbenzylidene camphor, benzylidene Camphorsulfonic acid, camphor sulfate benzalkonium methosulfate, polyacrylamide methylbenzylidene camphor, diethylhexylbutamide triazone, 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5- At least one compound (C) selected from the group consisting of triazine, disodium phenyldibenzimidazole tetrasulfonate, polyorganosiloxane having a benzalmalonate functional group, and octocrylene: containing at least one DNA and irradiating with light A photoresponsive capsule (D) comprising a wall membrane that is at least partially decomposed by the oil and an oil-soluble antioxidant component encapsulated in the wall membrane: lauroyl sarcosine isopropyl, caprylic / capric triglyceride, diisopropyl sebacate, and SE At least one 20 ° C. with an ester oil liquid is selected from the group consisting of thin diethyl (E): Water   The sunscreen cosmetic according to claim 1, wherein the UVB absorber is a solid compound at 20 ° C.   The sunscreen cosmetic according to claim 1 or 2, wherein the content of the photoresponsive capsule is 0.001 to 10 times on a mass basis with respect to the content of the UVB absorber.   The sunscreen cosmetic according to any one of claims 1 to 3, wherein the content of the UVA absorber is 0.1% by mass or more based on the total amount of the cosmetic.   The sunscreen cosmetic according to any one of claims 1 to 4, wherein the content of the photoresponsive capsule is 0.0001% by mass to 5% by mass in terms of solid content with respect to the total mass of the cosmetic. The oil-soluble antioxidant component encapsulated in the wall membrane of the photoresponsive capsule is: (1) dl-α-tocopherol, dl-β-tocopherol, dl-γ-tocopherol, dl-δ-tocopherol, dl-α-acetate From tocopherol, nicotinic acid-dl-α-tocopherol, linoleic acid-dl-α-tocopherol, dl-α-tocopherol succinate, α-tocotrienol, β-tocotrienol, γ-tocotrienol, δ-tocotrienol, and their acetates (2) Ascorbyl stearate, L-ascorbic acid 2-glucoside, ascorbyl palmitate, ascorbyl tetraisopalmitate, ascorbyl tetrahexyldecanoate, and ascorbyl acetate, and (3) retinol , palmitic acid acid Retinol ester, propionic acid retinol ester; at least one compound selected from the group consisting of 3-hydroretinol, retinal, 3-hydroretinal, retinoic acid, and 3-dehydroretinoic acid. The sunscreen cosmetic according to any one of 5.