JP2007126426A - Sun-screening cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sun-screening cosmetic capable of improving the ultraviolet light-absorbing ability of conventional ultraviolet light-absorbing agents synergistically. <P>SOLUTION: This sun-screening cosmetic is characterized by containing 2,4,6-tris[p-((2'-ethylhexyl)oxycarbonyl)anilino]1,3,5-triazine with an alkylaryl 1,3-propane dione silicone derivative expressed by general formula (I) [wherein, R<SP>1</SP>is hydroxy, a 1-8C alkyl or a 1-8C alkoxy; R<SP>2</SP>is a 1-7C alkyl: R<SP>3</SP>is a 2-10C divalent alkylene or oxyalkylene; R<SP>4</SP>s may be the same or different and are each a 1-4C alkyl, phenyl or trimethylsiloxy; (m), (n) are each 0-3 integer; and (p) is 0 or 1]. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sunscreen cosmetic. More specifically, the present invention relates to a sunscreen cosmetic that has a synergistic increase in absorption capacity in the UV-A region and the UV-B region.

  The important ultraviolet absorption wavelength regions by sunscreen cosmetics are the UV-A region (320 to 400 nm) and the UV-B region (290 to 320 nm). UV rays in the UV-A region (320 to 400 nm) invade the skin black, but it is considered that sunburn occurs like the ultraviolet rays in the UV-B region (290 to 320 nm) and does not promote skin aging. It was. However, in recent years, ultraviolet rays in the UV-B region stay relatively on the surface of the skin, whereas ultraviolet rays in the UV-A region reach the deep part of the skin, and induce skin cancer as well as skin aging. It has been found to be the cause.

  Cosmetic UV absorbers that have been used to date are classified according to the structure: (1) benzoic acid derivatives, (2) cinnamic acid derivatives, (3) benzophenone derivatives, (4) dibenzoylmethane derivatives, (5) Salicylic acid derivatives and the like. In recent years, the ultraviolet absorbers (2) and (4) are frequently used.

  However, the ultraviolet absorbers listed above have their respective problems from a practical standpoint. For example, in the benzoic acid derivative of (1), for example, p-dimethylaminobenzoic acid-2-ethylhexyl is liquid and transparent, and has advantages that it is easy to handle, but there is a suspicion of safety including these derivatives. It has not been used in recent years. Further, the maximum absorption wavelength is in the vicinity of 290 nm, and the ultraviolet ray only in the UV-B region is absorbed.

  In the cinnamic acid derivative (2), there is p-methoxycinnamic acid-2-ethylhexyl ester as an ultraviolet absorber most frequently used in sun care cosmetics currently on the market. The maximum absorption wavelength is around 310 nm, and the absorption region does not reach the UV-A region. In addition, the color changes due to sunlight and there is a problem in the sustainability of the coloring property and the UV protection effect.

  In the benzophenone derivative of (3), for example, 2-hydroxy-4-methoxybenzophenone has absorption over the UV-A and UV-B regions and has relatively good solubility in a skin external preparation base, but has a maximum absorption wavelength. Slightly close to the UV-B region and the absorbance is not very large. In recent years, a basic skeleton structure (benzophenone) has been pointed out as an environmental hormone and its use has been avoided.

  Of the dibenzoylmethane derivatives of (4), 4-tert-butoxy-4-methoxydibenzoylmethane is often used as a skin external preparation. The maximum absorption is in the vicinity of 360 nm, the absorbance is large, and it is excellent as an ultraviolet absorber in the UV-A region. However, there is a problem in light stability, the compatibility with the oil for skin external preparation is poor, and only a small amount can be mixed.

In the salicylic acid derivative (5), octyl salicylate is used. It has a maximum absorption wavelength in the UV-B region, is oily, and is excellent in compatibility with paraffin oil or the like, but is not practically used because of its low absorbance.

  For this reason, 2-ethylhexyl p-methoxycinnamate (2) is used in the UV-B region, and 4-tert-butoxy-4-methoxydibenzoylmethane (4) is used in the UV-A region. Often done. Particularly in recent years, there has been an increasing demand for ultraviolet absorption in the UV-A region.

  On the other hand, benzene 1,4-[(3-methylidenecamphomethylsulfonic acid)] that absorbs ultraviolet rays in the UV-A region, and 2,4,6-tris that absorbs ultraviolet rays in the UV-B region [ A cosmetic emulsion containing p- (2′-ethylhexyl-1′-oxycarbonyl) anilino] 1,3,5-triazine has also been developed (Patent Document 1). The synergistic effect is insufficient.

  On the other hand, external preparations for skin containing an alkylaryl 1,3-propanedione silicone derivative represented by the following general formula (I) as an ultraviolet absorber are disclosed in Patent Document 2 and Patent Document 3.

JP-A-4-226909 JP-A-5-194543 JP 11-269050 A

  In sunscreen cosmetics, as described above, it is extremely important to maintain a high ultraviolet absorbing ability in a wide range from UV-A to UV-B. And in order to achieve this, it mix | blends combining the ultraviolet absorber which has absorptivity in UV-A and UV-B area | region. However, the effect which exceeds each absorption ability cannot be exhibited only by mix | blending combining only two ultraviolet absorbers. Further, sunscreen cosmetics are required to have a combination that exhibits the maximum effect with a small amount of UV absorber.

  As a result of intensive studies from the above viewpoint, the present inventors have found that 2,4,6-tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] -1,3, which is a UV-B ultraviolet absorber. , 5-triazine and a specific structure alkylaryl 1,3-propanedione silicone derivative, which is a UV-A ultraviolet absorber, are combined in a synergistic manner to improve the UV-A and B ultraviolet absorption ability. In particular, the inventors have found that the ultraviolet absorption effect in the UV-B region is remarkably improved, and have completed the present invention.

（但し、Ｒ¹は水酸基、炭素数１〜８のアルキル基、又は炭素数１〜８のアルコキシ基、Ｒ²は炭素数１〜７のアルキル基、Ｒ³は炭素数２〜１０の二価のアルキレン基、又はオキシアルキレン基、Ｒ⁴は同一、又は異なってもよく、炭素数１〜４のアルキル基、フェニル基又はトリメチルシロキシ基、ｍ、ｎは０〜３の整数、ｐは０又は１を表わす。） That is, the present invention relates to 2,4,6-tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] 1,3,5-triazine and alkylaryl 1, which is represented by the following general formula (I): A sunscreen cosmetic characterized by containing a 3-propanedione silicone derivative.
Formula (I)

(However, R ¹ is a hydroxyl group, an alkyl group having 1 to 8 carbon atoms, or an alkoxy group having 1 to 8 carbon atoms, R ² is an alkyl group having 1 to 7 carbon atoms, and R ³ is a divalent atom having 2 to 10 carbon atoms. An alkylene group or an oxyalkylene group, R ⁴ may be the same or different, an alkyl group having 1 to 4 carbon atoms, a phenyl group or a trimethylsiloxy group, m and n are integers of 0 to 3, and p is 0 or Represents 1)

式（ＩＩＩ）

The present invention also provides the sunscreen cosmetic described above, wherein the alkylaryl 1,3-propanedione silicone derivative is a compound represented by the following formula (II) or (III): It is.
Formula (II)

Formula (III)

  The sunscreen cosmetic of the present invention can synergistically improve the ultraviolet absorbing ability of conventional ultraviolet absorbers. As a result, it is possible to provide a sunscreen cosmetic that exhibits high ultraviolet absorbing ability in a wide range from UV-A to UV-B. That is, the sunscreen cosmetic of the present invention uses a combination of ultraviolet absorbers that can exhibit the maximum absorption effect with a small amount of blending.

  In particular, in the sunscreen cosmetic of the present invention, ultraviolet absorption of 2,4,6-tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] -1,3,5-triazine in the UV-B region. The effect is significantly improved. Moreover, the effect of improving the sticky feeling of 2,4,6-tris [p-((2'-ethylhexyl) oxycarbonyl) anilino] 1,3,5-triazine is exhibited.

  Hereinafter, the present invention will be described in detail.

"2,4,6-Tris [p-((2'-ethylhexyl) oxycarbonyl) anilino] 1,3,5-triazine"
It is a known UV-B ultraviolet absorber represented by the following formula, and a commercially available product (Ubinal T150: manufactured by BASF) can be used in the present invention.

"Alkylaryl 1,3-propanedione silicone derivative represented by general formula (I)"
The alkylaryl 1,3-propanedione silicone derivative of the general formula (I) is a known compound (see Japanese Patent No. 3229383).
Examples of R ¹ are hydroxyl group, methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, sec-butyl group, t-butyl group, n-amyl group, isoamyl group, n-hexyl group, 2- Alkyl groups such as ethylbutyl group, n-octyl group, 2-ethylhexyl group, methoxy group, ethoxy group, propoxy group, isopropoxy group, butoxy group, isobutoxy group, s-butoxy group, t-butoxy group, n-amyloxy group And alkoxy groups such as isoamyloxy group, n-hexyloxy group, 2-ethylbutoxy group, n-pentyloxy group, n-octyloxy group and 2-ethylhexyloxy group.
R ² may be any alkyl group having 1 to 7 carbon atoms, but preferably has a secondary or tertiary carbon atom bonded to the carboxyl group. Particularly preferable examples of R ² include isopropyl group, tert-butyl group, ethylpropyl group, and ethylpentyl group.
R ³ may be any alkyl group having 2 to 10 carbon atoms. Examples of R ³ include —CH ₂ CH ₂ —, —CH ₂ CH ₂ CH ₂ —, —CH ₂ CH (CH ₃ ) CH. _{2 -, - CH (CH 3} ) CH 2 CH 2 -, - CH 2 CH 2 CH (CH 3) -, - CH 2 CH 2 CH 2 CH 2 -, - CH 2 CH 2 OCH 2 CH 2 -, hexylene , Cyclohexylene, decylene group, and the like, and an alkylene group having 2 to 4 carbon atoms is particularly preferable. Examples of R ⁴ include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a t-butyl group, a phenyl group and a trimethylsiloxy group. For this reason, it is preferable that the methyl group or a part thereof is a phenyl group or a trimethylsiloxy group.

M represents the number of substituents and is an integer of 0 to 3. n represents the number of repeating units of siloxane and is an integer of 0 to 3. p is 0 or 1.
R ⁴ may be the same or different, and examples thereof include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a t-butyl group, a phenyl group, and a trimethylsiloxy group. It is preferable that a part is a phenyl group or a trimethylsiloxy group.

又は、

第二段階
｛上記丸数字３の化合物｝＋｛分子内に一つのＳｉ−Ｈ基を含有する繰り返し単位数２〜５のシロキサン｝→ 一般式（ＩＩ） The alkyl-aryl 1,3-propanedione silicone derivatives used in the present invention include liquid or resinous solids at room temperature depending on the molecular weight, and any of them can be used as a UV-A absorber. The alkyl-aryl 1,3-propanedione silicone derivative of the present invention can be synthesized by the following two-stage reaction of the first stage Claisen condensation reaction and the second stage hydrosilylation reaction.







the first stage

Or

Second stage {Compound with the above circled number 3} + {siloxane having 1 to 5 repeating units containing one Si—H group in the molecule} → General formula (II)

In the above reaction formula, R ¹ , R ² , m, n, and p are defined by Chemical Formula ² , A is an alkyl group having 1 to 5 carbon atoms, and B is an alkenyl having 2 to 10 carbon atoms. Group or oxyalkenyl group. The first stage Claisen condensation reaction is described in R.C. Hauer et al., “Organic Reactions”, Vol. 8, p59, John Wiley and Sons Inc. , New York 1954, according to the present invention.

That is, a methyl alkyl ketone (circled number 1) or substituted acetophenone (circled number 5) and a fatty acid or substituted benzoic acid alkylphenyl (circled number 4) or a compound of rounded number 2 in the presence of a base such as an alkali alcoholate. In the presence of sodium hydride, hydroxide or amide compound, in a solvent such as toluene, isopropyl ether, tetrahydrofuran, 1,2-dimethoxyethane, dimethyl sulfoxide or dimethylformamide between room temperature and boiling point. An alkyl-aryl 1,3-propanedione derivative (circle numeral 3) can be obtained. The second stage reaction is a hydrosilylation reaction. It is known that this reaction is usually promoted by a platinum group metal, a platinum group metal compound, or a complex compound of the metal (Japanese Patent Laid-Open Nos. 60-108431, 60-210632, and 1-50711). Etc.)
Reaction of an alkylaryl 1,3-propanedione derivative (circled number 3) with a siloxane having 2 to 5 repeating units containing one SiH group is also possible using a conventional catalyst such as platinum supported on carbon or platinum chloride. The reaction is promoted with an acid, an acetylacetone platinum complex, a platinum complex with unsaturated compounds, an unsaturated siloxane platinum complex, a rhodium compound and a platinum compound complex.

The amount of 2,4,6-tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] 1,3,5-triazine is appropriately determined according to the target product. 0.5-5 mass% is preferable with respect to the whole quantity, and 1-3 mass% is further more preferable.
The amount of the alkylaryl 1,3-propanedione silicone derivative represented by the general formula (I) is appropriately determined according to the target product, but is 0.5 to 10 with respect to the total amount of the sunscreen cosmetic. % By mass is preferable, and 1 to 7% by mass is more preferable.

  In addition to the above essential ingredients, the sunscreen cosmetics of the present invention are usually used in skin preparations such as cosmetics and pharmaceuticals, such as whitening agents, moisturizers, antioxidants, oily ingredients, and other ultraviolet absorbers. , Surfactants, thickeners, alcohols, powder components, colorants, aqueous components, water, various skin nutrients and the like can be appropriately blended as necessary to produce them by conventional methods. For example, the following are mentioned as a compounding component.

Avocado oil, macadamia nut oil, corn oil, olive oil, rapeseed oil, evening primrose oil, castor oil, sunflower oil, teaseed oil, rice bran oil, jojoba oil, cacao butter, palm oil, squalene, beef tallow, owl, beeswax, candelilla wax Oils such as carnauba wax, whale wax, lanolin, liquid paraffin, polyoxyethylene (8 mol) oleyl alcohol ether, glyceryl monooleate, cyclomethicone, dimethylpolysiloxane, diphenylpolysiloxane.
Higher alcohols such as capryl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, cholesterol, phytosterol.
Higher fatty acids such as capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, lanolin fatty acid, linoleic acid, linolenic acid.
Moisturizers such as polyethylene glycol, glycerin, sorbitol, xylitol, maltitol, mucopolysaccharide, hyaluronic acid, chondroitin sulfate and chitosan.
Thickeners such as methylcellulose, ethylcellulose, gum arabic, and polyvinyl alcohol.
Organic solvents such as ethanol and 1,3-butylene glycol.
Antioxidants such as butylhydroxytoluene, tocopherol and phytic acid.
Antibacterial preservatives such as benzoic acid, salicylic acid, sorbic acid, paraoxybenzoic acid esters (such as ethylparaben and butylparaben), and hexachlorophene.
Amino acids and hydrochlorides such as glycine, alanine, valine, leucine, serine, threonine, phenylalanine, tyrosine, aspartic acid, asparagine, glutamine, taurine, arginine, histidine.
Organic acids such as acyl sarcosine acid (eg, lauroyl sarcosine sodium), glutathione, citric acid, malic acid, tartaric acid, lactic acid.
Vitamin A and its derivatives, vitamin B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 and its derivatives, vitamin B such as vitamin B12, vitamin B15 and its derivatives, ascorbic acid, ascorbic acid phosphate ( Salt), vitamin C such as ascorbic acid dipalmitate, α-tocopherol, β-tocopherol, γ-tocopherol, vitamin E acetate, vitamin E such as vitamin E nicotinate, vitamin D, vitamin H, pantothenic acid, pantethine, etc. Vitamins.
Nicotinamide, benzyl nicotinate, γ-oryzanol, allantoin, glycyrrhizic acid (salt), glycyrrhetinic acid and its derivatives, hinokitiol, mucidin, bisabolol, eucalyptol, thymol, inositol, saponins (psychosaponin, carrot saponin, loofah) Various drugs such as saponin, muclodisaponin, etc.), pantothenyl ethyl ether, ethinyl estradiol, tranexamic acid, cephalanthin, placenta extract.
Bark, Clara, Kouhone, Orange, Sage, Thyme, Yarrow, Zeni-oyster, Senkyu, Assembly, Spruce, Spruce, Birch, Sugina, Loofah, Maronie, Yukinoshita, Arnica, Lily, Mugwort, Peonies, Aloe, Gardenia, Sawara Natural extract extracted with solvent, alcohol, polyhydric alcohol, water, aqueous alcohol.
Cationic surfactants such as stearyltrimethylammonium chloride, benzalkonium chloride, and laurylamine oxide.
Metal sequestering agents such as disodium edetate, trisodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate and gluconic acid.
Fragrance, scrub agent, purified water, etc.

  Particularly preferred bases for the sunscreen cosmetics of the present invention are decamethylcyclopentasiloxane, isononyl isononanoate, dimethylpolysiloxane, heptamethyloctyltrisiloxane, trimethylsiloxysilicic acid, liquid paraffin, squalane, cetyl isooctanoate, isooctanoic acid It is an oil component of triglyceride and di-2-ethylhexyl succinate. Especially this invention is preferably utilized for the sunscreen cosmetics which have decamethylcyclopentasiloxane as a main component base.

  The sunscreen cosmetics of the present invention may be in any product form, such as ointments, creams, emulsions, lotions, packs, and the like. The dosage form is not particularly limited.

  The present invention will be specifically described below with reference to examples. The present invention is not limited to these examples.

「化合物２」

「化合物３」

「化合物４」

「化合物５」

「化合物６」

「化合物７」

「化合物８」

「化合物９」

なお、前記化合物１〜９中、Ｓｉ₂、Ｓｉ₃、Ｓｉ₅はそれぞれ次の化学式で示される。
「Ｓｉ₂」

「Ｓｉ₃」

「Ｓｉ₅」

<Synthesis example of alkylaryl 1,3-propanedione silicone derivative represented by general formula (I)>
Preferred specific compounds include the following compounds 1 to 9, and of these, production examples of compound 1, compound 2, compound 5, compound 7, compound 8, and compound 9 are shown.
"Compound 1"

"Compound 2"

"Compound 3"

"Compound 4"

"Compound 5"

“Compound 6”

“Compound 7”

"Compound 8"

"Compound 9"

In the compounds 1 to 9, Si ₂ , Si ₃ and Si ₅ are represented by the following chemical formulas.
"Si ₂ "

"Si ₃ "

“Si ₅ ”

“Production Example of Compound 1”
1- (3-methoxy-4-allyloxyphenyl) -3-tert-butyl 1,3-propanedione 2.5 g, 1,1,1,3,3-pentamethyldisiloxane 1.7 g, toluene 20 ml To the mixed solution, 0.5 mg of hexachloroplatinic acid (IV) hexahydrate was added and reacted at 100 to 105 ° C. for 6 hours with stirring. After completion of the reaction, toluene was distilled off under reduced pressure, and the residue was separated and purified by silica gel column chromatography (eluted with a 2 v / v% ethyl acetate-hexane mixture) to obtain 2.6 g of a colorless oil. The yield was 68.4%. λ _max : 335 nm (ε = 24090), mass spectrum M ⁺ m / e 438

“Production Example of Compound 2”
13.0 g of 1- (3-methoxy-4-allyloxyphenyl) -3-tert-butyl 1,3-propanedione, 11.0 g of 1,1,1,3,5,5,5-heptamethyltrisiloxane Then, 0.03 g of a tetramethyldivinyldisiloxane platinum complex toluene solution (platinum content: 4 w / w%) was added to a solution of 30 ml of toluene, and the mixture was refluxed with stirring for 5 hours. After completion of the reaction, toluene was distilled off under reduced pressure and separated and purified by silica gel chromatography (eluted with a 2 v / v% ethyl acetate-hexane mixture) to obtain 10.2 g of the desired product. The yield was 47.1%. λ _max : 334 nm (ε = 23550), mass spectrum M ⁺ m / e 512

“Production Example of Compound 5”
1- (3-allyl-4,5-dimethoxyphenyl) -3- (1-ethylpentyl) -1,3-propanedione 3.4 g, 1,1,1,3,5,5,5-heptamethyl To a solution of 2.4 g of trisiloxane and 20 ml of toluene, 0.01 g of a tetramethylvinyldisiloxane platinum complex toluene solution (platinum content 4 w / w%) was added and reacted for 6 hours under reflux. After completion of the reaction, toluene was distilled off under reduced pressure, and the residue was applied to a silica gel column. Elution with a 1 v / v ethyl acetate-hexane mixture gave 4.1 g of the desired product. The yield was 73.2%. Colorless oil λ _max : 334 nm (ε = 23500), mass spectrum M ⁺ m / e 568

“Production Example of Compound 7”
1- {3-methoxy-4- (2-methyl-2-propenoxy) phenyl} -3-tert-butyl-1,3-propanedione 25.1 g, 1,1,1,3,5,5,5 -0.05 g of the platinum catalyst described in Example 2 was added to a solution of 20.2 g of heptamethyltrisiloxane and 50 ml of toluene, and reacted at 100 ° C to 110 ° C for 18 hours. After completion of the reaction, toluene was distilled off, and the residue was distilled under reduced pressure to separate and purify the target product. Yield 28.8 g, pale yellow oil, boiling point bp 182-184 ° C./2 mmHg, λ _max : 334 nm (ε = 27350), mass spectrum M ⁺ m / e 526

“Production Example of Compound 8”
1- {3-methoxy-4- (4-pentenoxy) phenyl} -3-tert-butyl-1,3-propanedione 38.7 g, 1,1,1,3,5,5,5-heptamethyltri 29.7 g of siloxane and 0.02 g of the platinum catalyst described in Example 2 were dissolved in 70 ml of toluene, and reacted at 95 ° C. to 100 ° C. for 4 hours. After completion of the reaction, toluene was distilled off, and the residue was distilled under reduced pressure to obtain 39.7 g of the desired compound. Pale yellow oil, boiling point bp 215-225 ° C (bath temperature) / 2 mmHgλ _max : 334 nm (ε = 23220), mass spectrum M ⁺ m / e 540

“Production Example of Compound 9”
1- (3-methoxy-4-hydroxy-5-allylphenyl)-obtained by Claisen rearrangement reaction of 1- (3-methoxy-4-allyloxyphenyl) -3-tert-butyl-1,3-propanedione 18.4 g of 3-tert-butyl-1,3-propanedione (pale yellow crystals, melting point 115-116 ° C.), 15.5 g of 1,1,1,3,5,5,5-heptamethyltrisiloxane 0.02 g of the platinum catalyst described in Example 2 was dissolved in 50 ml of toluene and reacted at 100 ° C. to 110 ° C. for 6 hours. After completion of the reaction, toluene was distilled off, and the residue was separated and purified by silica gel column chromatography (eluted with 7 v / v% ethyl acetate-hexane mixed solution) to obtain 21.7 g of the desired product. Pale yellow solid, mp 38-39 ° C. λ _max : 342 nm (ε = 24000), mass spectrum M ⁺ m / e 512

The ultraviolet absorption characteristics of the ultraviolet absorbers shown in “Table 1” below were examined. The result is shown in the ultraviolet absorption spectrum of FIGS.
"Measurement method and conditions"
Each ultraviolet absorber was dissolved in glyceryl tri-2-ethylhexanoate at 70 ° C. at the ratio shown in Table 1. After cooling to room temperature, 50 μL of a sample dissolved in a 5 × 5 cm nylon thin film was applied and spread uniformly. After 15 minutes, the absorbance was measured with a spectrophotometer.

紫外線吸収剤Ａ：１−（３−メトキシ−４−アリロキシフェニル）−３−ｔｅｒｔ−ブチル１，３−プロパンジオン
｛一般式（Ｉ）で示されるアルキルアリール１，３−プロパンジオンシリコーン誘導体｝

紫外線吸収剤Ｂ：２，４−ビス｛［４−（２−エチルヘキシルオキシ）−２−ヒドロキシ］−フェニル｝−６−（４−メトキシフェニル）−１，３，５−トリアジン

紫外線吸収剤Ｃ：２−シアノ−３，３−ジフェニルアクリル酸エチルヘキシル

紫外線吸収剤Ｄ：ジエチルアミノヒドロキシベンゾイル安息香酸ヘキシル

紫外線吸収剤Ｅ：２，４，６−トリス［ｐ−（（２’−エチルヘキシル）オキシカルボニル）アニリノ］−１，３，５−トリアジン

Ultraviolet absorber A: 1- (3-methoxy-4-allyloxyphenyl) -3-tert-butyl 1,3-propanedione {alkylaryl 1,3-propanedione silicone derivative represented by the general formula (I)}

UV absorber B: 2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] -phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine

UV absorber C: ethylhexyl 2-cyano-3,3-diphenylacrylate

UV absorber D: hexyl diethylaminohydroxybenzoylbenzoate

Ultraviolet absorber E: 2,4,6-tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] -1,3,5-triazine

FIG. 1 shows 2,4,6-tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] 1,3,5-triazine and an alkylaryl 1,3-propanedione silicone of the general formula (I) It is the ultraviolet light absorption spectrum (absorbance) which compared the combination with the derivative | guide_body, and the absorption characteristic of each independently.
FIGS. 2 to 4 are absorption spectra (absorbances) comparing the ultraviolet absorber characteristics of other dimebenzoylmethane derivative ultraviolet absorbers with each other.
1-4, in the combination of UV absorbers of dimethylbenzoylmethane derivatives, 2,4,6-tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] -1,3,5-triazine, In combination with alkylaryl 1,3-propanedione silicone derivatives of general formula (I), synergistically prominent UV radiation in the UV-A and UV-B regions of 280 to 400 nm, respectively, compared to single absorption. It can be seen that it has absorption characteristics. In particular, it can be seen that the ultraviolet absorption effect in the UV-B region by 2,4,6-tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] -1,3,5-triazine is remarkably increased. .

The prescription example of the sunscreen cosmetics of this invention is given to the following.
"Example 2: Sunscreen cosmetic W / O emulsion"
mass%
1. Dimethylpolysiloxane 1
2. Decamethylcyclopentasiloxane 25
3. Trimethylsiloxysilicic acid 5
4). Polyoxyethylene methylpolysiloxane copolymer 1
5. Lauryl PEG-9 polydimethylsiloxyethyl dimethicone 1
6). Isononyl isononanoate 5
7). Dipropylene glycol 5
8). Dipotassium glycyrrhizinate 0.02
9. Glutathione 1
10. Thiotaurine 0.05
11. Clara extract 1
12 Paraben appropriate amount13. Phenoxyethanol appropriate amount14. 2-Ethylhexyl paramethoxycinnamate 7.5
15. Dimethyl distearyl ammonium hectorite 0.5
16. Spherical polyalkyl acrylate powder 5
17. Butylethylpropanediol 0.5
18.2,4,6-Tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] 1,3,5-triazine 2
19. Alkyl-aryl 1,3-propanedione silicone derivatives of formula (II)
5
20. Hydrophobized zinc oxide or hydrophobically treated titanium oxide 15
21. Purified water Residual production method The aqueous phase was gradually added to the oil phase, and after completion of the addition, the emulsified particles were prepared to be uniform using a stirrer.

"Example 3: Sunscreen cosmetic O / W emulsion"
mass%
1. Polyoxyethylene hydrogenated castor oil 1
2. Dimethicone copolyol 0.5
3. Decamethylcyclopentasiloxane 15
4). Isostearic acid 0.5
5. Phenyltrimethicone 1
6). Hydrophobized titanium oxide 5
7. 2,4,6-tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] 1,3,5-triazine 3
8). 2-methoxyhexyl paramethoxycinnamate 5
9. Alkyl-aryl 1,3-propanedione silicone derivatives of formula (III)
5
10. Silica 1
11. Citric acid 0.01
12 Sodium citrate 0.09
13. Paraben appropriate amount14. Phenoxyethanol appropriate amount15. Alcohol 5
16. Dynamite Glycerin 1
17. Succinoglucan 0.2
18. Cellulose gum 1
19. Ion-exchanged water Residual production method After preparing the aqueous phase of 9 to 18, it was gradually added to the oil phase of 1 to 8, and finally stirred using a homomixer.

"Example 4: Sunscreen cosmetic O / W / O emulsion"
mass%
1. Polyoxyethylene hydrogenated castor oil 0.5
2. Isostearic acid 0.2
3. 2-Ethylhexyl paramethoxycinnamate 7.5
4). Alkyl-aryl 1,3-propanedione silicone derivatives of formula (III)
3.0
5. 2,4,6-Tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] 1,3,5-triazine 2.0
6). Decamethylcyclopentasiloxane 35
7). Polyoxybutylene polyoxypropylene glycol 2.0
8). Dimethyl distearyl ammonium hectorite 0.5
9. Hydrophobized titanium oxide 12.0
10. Citric acid 0.04
11. Sodium citrate 0.06
12 Dipropylene glycol 2.0
13. Methyl glucose 1.0
14 Dynamite Glycerin 1.0
15. Salt 0.1
16. Methyl paraben appropriate amount 17. Phenoxyethanol appropriate amount 18. Ion-exchanged water Residual production method The oil phase of 1 to 5 was gradually added to the water phase of 10 to 18 to obtain an O / W preparation. This formulation was gradually added to the oil phase of 6-9, and then stirred with a homomixer to obtain the desired sample.

  The sunscreen cosmetic of the present invention can synergistically improve the ultraviolet absorbing ability of conventional ultraviolet absorbers. As a result, it is possible to provide a sunscreen cosmetic that exhibits high ultraviolet absorbing ability in a wide range from UV-A to UV-B. In particular, a sunscreen cosmetic capable of significantly improving the ultraviolet absorption effect in the UV-B region by 2,4,6-tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] -1,3,5-triazine. Can provide.

It is an ultraviolet absorption spectrum (absorbance) showing absorption characteristics in the UV-A and UV-B regions. It is an ultraviolet absorption spectrum (absorbance) showing absorption characteristics in the UV-A and UV-B regions. It is an ultraviolet absorption spectrum (absorbance) showing absorption characteristics in the UV-A and UV-B regions. It is an ultraviolet absorption spectrum (absorbance) showing absorption characteristics in the UV-A and UV-B regions.

Claims (2)

2,4,6-tris [p-((2′-ethylhexyl) oxycarbonyl) anilino] 1,3,5-triazine and an alkylaryl 1,3-propanedione silicone derivative represented by the following general formula (I) And sunscreen cosmetics characterized by containing.
Formula (I)

(However, R ¹ is a hydroxyl group, an alkyl group having 1 to 8 carbon atoms, or an alkoxy group having 1 to 8 carbon atoms, R ² is an alkyl group having 1 to 7 carbon atoms, and R ³ is a divalent atom having 2 to 10 carbon atoms. An alkylene group or an oxyalkylene group, R ⁴ may be the same or different, an alkyl group having 1 to 4 carbon atoms, a phenyl group or a trimethylsiloxy group, m and n are integers of 0 to 3, and p is 0 or Represents 1) The sunscreen cosmetic according to claim 1 or 2, wherein the alkylaryl 1,3-propanedione silicone derivative is a compound represented by the following formula (II) or (III).
Formula (II)

Formula (III)

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