JP2008007444A - New cinnamic acid derivative, application of the same as ultraviolet ray absorber and ultraviolet ray absorbing composition formulated with the same, skin care preparation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultraviolet absorber with high solubility to water, having an excellent absorbing property in wide ultraviolet ray range, without absorption in visible region, and high stability and safety, and to provide an ultraviolet ray absorbing composition formulated with the same, and especially to provide a skin care preparation. <P>SOLUTION: The composition comprises ultraviolet absorber principally comprising a new cinnamic acid derivative represented by structural formula (1) and its salt as the principal component. (In the formula R<SB>1</SB>, R<SB>2</SB>, R<SB>3</SB>are each independently H or a methoxy group, either one of R<SB>4</SB>, R<SB>5</SB>represents -ä(CH<SB>2</SB>)<SB>m</SB>-O}<SB>n</SB>-R<SB>6</SB>and the other represents H or a methyl group, R<SB>6</SB>is H or a 1-4C alkyl group, m is 2-4, n is 1-5.). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a novel cinnamic acid derivative, and its use as an ultraviolet absorber, particularly as an ultraviolet absorber having high water solubility and no absorption in the visible light region, and an ultraviolet ray containing the same. It is related with an absorptive composition, especially skin external preparation.

  Among ultraviolet rays contained in sunlight, ultraviolet rays having a wavelength of 290 nm or less are absorbed by the ozone layer and do not reach the ground surface, but ultraviolet rays of 290 nm to 400 nm reach the ground surface and have various effects. Dermatochemically, it is known that medium wavelength ultraviolet rays of 290 nm to 320 nm cause erythema and blister formation, melanogenesis enhancement, pigmentation and the like. In addition, long wavelength ultraviolet rays of 320 nm to 400 nm have an immediate blackening effect that darkens the skin immediately after irradiation, and since the energy reaches the dermis, it also affects the elastic fibers in the blood vessel wall and connective tissue. It is said to affect. These effects of medium to long wavelength ultraviolet rays are considered to promote skin aging and contribute to the formation of spots, freckles, wrinkles and the like.

  In order to protect the skin from such ultraviolet rays, ultraviolet absorbers such as benzotriazole derivatives, benzophenone derivatives, salicylic acid derivatives, paraaminobenzoic acid derivatives, cinnamic acid derivatives and urocanic acid derivatives have been used.

However, these UV absorbers are generally oil soluble and could not be incorporated into aqueous based products. Recently, UV protection is considered important not only in summer bathing and winter skiing, but also in daily life, and ordinary skin care cosmetics are also desired to have UV protection effects. Therefore, it is desired to develop a water-soluble ultraviolet absorber that can be incorporated in a sufficient amount in water-based skin care cosmetics such as skin lotions.
Moreover, as an ultraviolet absorber, when it mix | blends with a skin external preparation, it is important that it is not decomposed | disassembled by sun exposure not to mention that there is no skin irritation.

Until now, there is almost no water-soluble ultraviolet absorber, and 2-hydroxy-4-methoxy-5-sulfoxonium benzophenone sodium is known as a currently used one. However, since this substance is a sulfonate, it has an effect on the pH of the blending system, and the ultraviolet absorption region varies depending on the pH of the blending system. Further, although this substance is water-soluble, its solubility is only about 6% at 25 ° C., and there is a problem that it is precipitated at a low temperature when blended in a high concentration in the product. Furthermore, since this substance has absorption also in the visible light region, it is colored pale yellow, which has the drawback of affecting the color tone of the product.
Further, p-aminobenzoic acid amide derivatives having a 2-deoxyhexose residue (Patent Document 1) and cinnamic acid amide having a 2-deoxyhexose residue (Patent Document 2) are disclosed, respectively. The solubility was low and insufficient, and it was not always satisfactory.
In addition, the present inventors have synthesized a methoxycinnamic acid amide derivative and have already filed a patent application (Patent Documents 3 and 4). However, ultraviolet absorption ability, solubility in water, Further improvements in stability, usability, safety, etc. have been desired. The specific compounds of the present invention are not disclosed in the above two documents.
Japanese Patent Laid-Open No. 10-120698 JP 2002-363195 A JP 2006-131603 A JP 2006-131855 A

Ultraviolet absorbers are also used in fields other than pharmaceuticals and cosmetics. For example, UV absorbers are added to various materials such as paints, dyes, pigments, various resins, synthetic rubbers, latexes, films, fibers, etc. In addition, the product itself or a product coated with a coating film or film thereof is protected from ultraviolet rays, and is used for maintaining quality by preventing deterioration and alteration due to ultraviolet rays. However, conventional UV absorbers also have the problem that they sublimate and volatilize by heating during baking of the coating film, resin molding, etc., or gradually volatilize over time without heating. It was.

  The present invention has been made in view of the above-described problems of the prior art, and its purpose is, in part, high water solubility, excellent absorption capability over a wide ultraviolet wavelength region, and absorption in the visible region. In addition, it is to provide a UV absorber having high stability and safety, and also to provide a UV-absorbing composition containing this UV absorber, particularly a skin external preparation.

（１）
（式中、Ｒ_１、Ｒ_２、Ｒ_３はそれぞれ独立して、水素原子またはメトキシ基を表し、Ｒ_４、Ｒ_５の何れか一方は-｛(ＣＨ_２)_ｍ -Ｏ｝_ｎ-Ｒ_６を表し、他方は水素原子またはメチル基を表し、Ｒ_６は水素原子または炭素数１〜４のアルキル基を表し、ｍは２〜４を表し、ｎは１〜５を表す。） As a result of intensive studies by the present inventors in order to achieve the above object, certain cinnamic acid derivatives have the above-mentioned properties and are very excellent as water-soluble ultraviolet absorbers. As a result, the present invention has been completed.
That is, the present invention is a novel water-soluble, excellent absorption ability over a wide ultraviolet wavelength region, no absorption in the visible region, and high stability and safety. The following cinnamic acid derivatives (1) and salts thereof.

(1)
(In the formula, R ₁ , R ₂ and R ₃ each independently represents a hydrogen atom or a methoxy group, and either R ₄ or R ₅ represents — {(CH ₂ ) _m —O} _n —R _6. And the other represents a hydrogen atom or a methyl group, R ₆ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, m represents 2 to 4, and n represents 1 to 5.)

The ultraviolet absorber according to the present invention is characterized by comprising the cinnamic acid derivative and a salt thereof as a main component.
The ultraviolet absorbing composition according to the present invention is characterized by containing the above-described ultraviolet absorber.
Moreover, the skin external preparation concerning this invention contains the said ultraviolet absorber.
The external preparation for skin according to the present invention further contains an inorganic powder.

The novel cinnamic acid derivative of the present invention is extremely water-soluble and can be blended into water-based products, and has a very good UV absorption ability over a wide UV wavelength range, making it safe and stable. The nature is also high. Therefore, by blending this, a skin external preparation having a high ultraviolet ray prevention effect and good safety and stability can be obtained. In addition, since the cinnamic acid derivative does not absorb in the visible part, the problem of coloring the product does not occur.

Hereinafter, preferred embodiments of the present invention will be described, but the present invention is not limited thereto.
The cinnamic acid derivative (1) of the present invention can be the compound (1 ′) which is an isomer of the cinnamic acid derivative (1) due to the following equilibrium under certain conditions.

（１） （１'）
（式中、Ｒ_１、Ｒ_２、Ｒ_３はそれぞれ独立して、水素原子またはメトキシ基を表し、Ｒ_４、Ｒ_５の何れか一方は-｛(ＣＨ_２)_ｍ -Ｏ｝_ｎ-Ｒ_６を表し、他方は水素原子またはメチル基を表し、Ｒ_６は水素原子または炭素数１〜４のアルキル基を表し、ｍは２〜４を表し、ｎは１〜５を表す。）
本発明においては、便宜上桂皮酸誘導体（１）についてのみ記載するが、化合物（１'）又はその混合物であってもよい。

(1) (1 ')
(In the formula, R ₁ , R ₂ and R ₃ each independently represents a hydrogen atom or a methoxy group, and either R ₄ or R ₅ represents — {(CH ₂ ) _m —O} _n —R _6. And the other represents a hydrogen atom or a methyl group, R ₆ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, m represents 2 to 4, and n represents 1 to 5.)
In the present invention, only the cinnamic acid derivative (1) is described for convenience, but it may be the compound (1 ′) or a mixture thereof.

Although the chemical name of the cinnamic acid derivative of the present invention varies depending on R ₁ , R ₂ , R ₃ , R ₄ and R ₅ , for example, R ₁ : methoxy group, R ₂ : methoxy group, R ₃ : methoxy group, R ₄ : 2- (2-hydroxyethoxy) ethyl group, R ₅ : For hydrogen atom, 3,4,5-trimethoxycinnamic acid N-2- (2-hydroxyethoxy) ethylamide, R ₁ : Hydrogen atom, R ₂ : Methoxy Group, R ₃ : hydrogen atom, R ₄ :
2- (2-hydroxyethoxy) ethyl group, R ₅ : As a hydrogen atom, 4-methoxycinnamic acid N-2- (2-hydroxyethoxy) ethylamide, R ₁ : methoxy group, R ₂ : methoxy group, R ₃ : Hydrogen atom, R ₄ :
2- (2-hydroxyethoxy) ethyl group, R ₅ : For hydrogen atom, 3,4-dimethoxycinnamic acid N-2- (2-hydroxyethoxy) ethylamide and the like.

The cinnamic acid derivative of the present invention can be easily synthesized by a known amide bond generation method. That is, 3,4,5-trimethoxycinnamic acid, 4-methoxycinnamic acid or 3,4-dimethoxy, which are commercially available from Tokyo Chemical Industry Co., Ltd., Wako Pure Chemical Industries, Ltd. and the like, can be easily obtained. Using cinnamic acid as a starting material, the carboxyl group is activated to form an activated form, and the activated form is easily commercially available from Tokyo Chemical Industry Co., Ltd., Wako Pure Chemical Industries, Ltd., ALDRICH, etc. The cinnamic acid derivative of the present invention can be obtained by reacting an available amine such as 2- (2-aminoethoxy) ethanol.
Examples of the method for activating carboxyl groups such as 3,4,5-trimethoxycinnamic acid, 4-methoxycinnamic acid or 3,4-dimethoxycinnamic acid include (1) p-nitrophenyl ester, N-hydroxysuccinimide ester, etc. (2) Mixed acid anhydride method using mixed acid anhydride with carbonic acid monoalkyl ester using isobutyloxycarbonyl chloride, ethyloxycarbonyl chloride, etc., (3) Phosphorus trichloride, phosphorus pentachloride, An acid chloride method using an acid chloride obtained by reacting with thionyl chloride or the like, (4) a symmetric anhydride method using cinnamic acid anhydride, or the like can be used.

Further, N, N′-dicyclohexyl is added to a mixed solution of 3,4,5-trimethoxycinnamic acid, 4-methoxycinnamic acid or 3,4-dimethoxycinnamic acid and the like and an amine such as 2- (2-aminoethoxy) ethanol. The cinnamic acid derivative of the present invention can be obtained by adding a coupling reagent such as carbodiimide (DCC), N-hydroxysuccinimide and DCC, or 1-hydroxybenzotriazole and DCC.

Also, if a mixed solution of 3,4,5-trimethoxycinnamic acid ester, 4-methoxycinnamic acid ester or 3,4-dimethoxycinnamic acid ester, etc. and an amine such as 2- (2-aminoethoxy) ethanol is required. For example, it can be obtained by heating in the presence of an acid catalyst or the like.

  The cinnamic acid derivative of the present invention may be converted into an inorganic salt or an organic salt by a possible method. Although it does not specifically limit as a salt used in this invention, For example, as an inorganic salt, hydrochloride, sulfate, phosphate, hydrobromide, sodium salt, potassium salt, magnesium salt, calcium salt, ammonium Examples include salts. Organic salts include acetate, lactate, maleate, fumarate, tartrate, citrate, methanesulfonate, p-toluenesulfonate, triethanolamine salt, diethanolamine salt, amino acid salt, etc. It is preferable in terms of improvement in solubility, improvement in properties, pH control of the compound, and the like.

  Although the ultraviolet absorber which has a cinnamic acid derivative or its salt as a main component of this invention can be mix | blended with various products, it is suitable to mix | blend with a skin external preparation. The external preparation for skin containing the ultraviolet absorbent according to the present invention exhibits an excellent ultraviolet prevention effect, and since the ultraviolet absorbent is not decomposed even under exposure to sunlight, the effect is stably exhibited over a long period of time. Further, it does not cause skin troubles and is particularly useful as an external preparation for sunscreen.

Moreover, in the skin external preparation for sunscreens, in order to enhance the ultraviolet shielding effect, it is desirable to use an inorganic powder ultraviolet shielding agent together with an organic compound ultraviolet absorbing agent. Also, makeup powders often contain inorganic powders. However, when an organic ultraviolet absorber is used in combination with inorganic powder, discoloration may occur.
The ultraviolet absorbent of the present invention does not cause discoloration even when blended with an external preparation for skin together with inorganic powder, and thus can be used in combination with inorganic powder.
Such an inorganic powder is not particularly limited as long as it is usually blended in cosmetics and pharmaceuticals. For example, talc, kaolin, boron nitride, mica, sericite, muscovite, biotite, phlogopite, synthetic mica, synthetic mica, permiculite, magnesium carbonate, calcium carbonate, anhydrous silicic acid, aluminum silicate, oxidation Aluminum, barium silicate, calcium silicate, magnesium silicate, metal tungstate, magnesium, silica, zeolite, barium sulfate, calcined calcium sulfate, calcined gypsum, calcium phosphate, fluorapatite, hydroxyapatite, ceramic powder, metal soap (myristin In addition to inorganic powders such as zinc oxide, calcium palmitate, and aluminum stearate), titanium dioxide, zinc oxide, iron oxide, iron titanate, carbon, low-order titanium oxide, mango violet, cobalt violet, black oxide , Chromium hydroxide, cobalt titanate, ultramarine, Prussian blue, titanium oxide-coated mica, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, colored titanium oxide-coated mica, bismuth oxychloride, and inorganic pigments such as fish scale flake.

The form of the external preparation for skin of the present invention is not particularly limited as long as the effect of the present invention is exhibited. For example, in addition to skin care cosmetics such as lotion, milky lotion, cream, and beauty liquid, makeup for bases, makeup cosmetics such as foundation, lipstick, face color, eyeliner, hair spray, hair tonic, hair liquid, etc. And scalp cosmetics.
When the ultraviolet absorbent of the present invention is blended with the external preparation for skin, the blending amount may be appropriately determined according to the intended ultraviolet absorbing ability, but is usually 0.001 to 20% by mass, preferably 0 in the composition. 0.01 to 10% by mass.

  In addition to the above essential components, the external preparation for skin of the present invention is usually a component that can be blended in cosmetics and pharmaceuticals, such as liquid fats, solid fats, waxes, hydrocarbons, higher fatty acids, higher alcohols, esters, silicones, Anionic surfactant, cationic surfactant, amphoteric surfactant, nonionic surfactant, moisturizer, water-soluble polymer compound, thickener, coating agent, sequestering agent, lower alcohol, polyhydric alcohol, Sugars, amino acids, organic amines, pH adjusters, skin nutrients, vitamins, antioxidants, fragrances, powders, coloring materials, water, and the like can be appropriately blended as necessary. Moreover, ultraviolet absorbers other than the cinnamic acid derivative of the present invention can also be blended.

Moreover, the ultraviolet absorber according to the present invention can be blended in products other than the skin external preparation, for example, paints, dyes, pigments, various resins, synthetic rubbers, latexes, films, fibers, etc. for ultraviolet protection. It is. Since the cinnamic acid derivative according to the present invention is excellent in thermal stability and does not volatilize, its efficacy can be maintained for a long time. The compounding quantity in this case is 0.001-20 mass% normally, Preferably it is 0.01-10 mass%.
Hereinafter, the present invention will be specifically described with reference to examples. The present invention is not limited to these.

3,4,5-トリメトキシ桂皮酸(8.00g,
33.58mmol)をジメチルホルムアミド(50mL)に溶解し、N-メチルモルホリン(8.1mL, 73.88mmol)、1-エチル-3-(3’-ジメチルアミノプロピル)カルボジイミド(WSC)塩酸塩(6.76g,
35.26mmol)を加えた。室温で1時間撹拌後、p-ニトロフェノール(4.91g, 35.26mmol)を加えた。室温で3時間撹拌後、水を加え、析出した固体を濾取した。得られた固体を水で洗浄し、標題化合物を得た(8.54g,
収率71%)。
¹H NMR (CDCl₃) δ8.31(d, J =
9.2Hz, 2H), 7.83(d, J = 16.0Hz, 1H), 7.38(d, J = 9.2Hz, 2H), 6.83(s, 2H),
6.53(d, J = 16.0Hz, 1H), 3.92(s, 6H), 3.91(s, 3H). Production Example 1 3,4,5-Trimethoxycinnamic acid
Synthesis of N-2- (2-hydroxyethoxy) ethylamide
(1) Synthesis of p-nitrophenyl ester of 3,4,5-trimethoxycinnamic acid

3,4,5-trimethoxycinnamic acid (8.00 g,
33.58 mmol) was dissolved in dimethylformamide (50 mL) and N-methylmorpholine (8.1 mL, 73.88 mmol), 1-ethyl-3- (3′-dimethylaminopropyl) carbodiimide (WSC) hydrochloride (6.76 g,
35.26 mmol) was added. After stirring at room temperature for 1 hour, p-nitrophenol (4.91 g, 35.26 mmol) was added. After stirring at room temperature for 3 hours, water was added and the precipitated solid was collected by filtration. The resulting solid was washed with water to give the title compound (8.54 g,
Yield 71%).
¹ H NMR (CDCl ₃ ) δ8.31 (d, J =
9.2Hz, 2H), 7.83 (d, J = 16.0Hz, 1H), 7.38 (d, J = 9.2Hz, 2H), 6.83 (s, 2H),
6.53 (d, J = 16.0Hz, 1H), 3.92 (s, 6H), 3.91 (s, 3H).

3,4,5-トリメトキシ桂皮酸
p-ニトロフェニルエステル(1.00g, 2.78mmol)をテトラヒドロフラン(20mL)に溶解し、2-(2-アミノエトキシ)エタノール(0.29mL,
2.92mmol)を加えた。室温で1時間撹拌後、溶媒を留去した。得られた残渣をシリカゲルカラムクロマトグラフィー(酢酸エチル⇒クロロホルム/メタノール=30/1)により精製し、標題化合物を得た(0.729g,
収率81%)。
¹H-NMR(DMSO-d₆)δ7.97(t,
J=5.8Hz, 1H), 7.36(d, J=15.5Hz, 1H), 6.89(s, 2H), 6.62(d, J=15.5Hz, 1H),
4.51(t, J=5.8Hz, 1H), 3.81(s, 6H), 3.69(s, 3H), 3.54-3.44(m, 6H), 3.34(dt,
J=5.8Hz, 5.8Hz, 2H). (2) Synthesis of 3,4,5-trimethoxycinnamic acid N-2- (2-hydroxyethoxy) ethylamide

3,4,5-trimethoxycinnamic acid
p-Nitrophenyl ester (1.00 g, 2.78 mmol) was dissolved in tetrahydrofuran (20 mL) and 2- (2-aminoethoxy) ethanol (0.29 mL,
2.92 mmol) was added. After stirring at room temperature for 1 hour, the solvent was distilled off. The obtained residue was purified by silica gel column chromatography (ethyl acetate => chloroform / methanol = 30/1) to obtain the title compound (0.729 g,
Yield 81%).
¹ H-NMR (DMSO-d ₆ ) δ7.97 (t,
J = 5.8Hz, 1H), 7.36 (d, J = 15.5Hz, 1H), 6.89 (s, 2H), 6.62 (d, J = 15.5Hz, 1H),
4.51 (t, J = 5.8Hz, 1H), 3.81 (s, 6H), 3.69 (s, 3H), 3.54-3.44 (m, 6H), 3.34 (dt,
J = 5.8Hz, 5.8Hz, 2H).

4-メトキシ桂皮酸(8.00g,
33.58mmol)をジメチルホルムアミド(60mL)に溶解し、N-メチルモルホリン(10.6mL, 98.78mmol)、1-エチル-3-(3’-ジメチルアミノプロピル)カルボジイミド(WSC)塩酸塩(9.04g,
47.14mmol)を加えた。室温で1時間撹拌後、p-ニトロフェノール(6.56g, 47.14mmol)を加えた。室温で2時間撹拌後、水を加え、析出した固体を濾取した。得られた固体を水で洗浄し、標題化合物を得た(8.93g,
収率66%)。
¹H NMR (CDCl₃) δ8.29(d, J =
9.2Hz, 2H), 7.86(d, J = 16.0Hz, 1H), 7.56(d, J = 8.7Hz, 2H), 7.36(d, J = 9.2Hz,
2H), 6.95(d, J = 8.7Hz, 2H), 6.48(d, J = 16.0Hz, 1H), 3.87(s, 3H). Production Example 2 4-Methoxycinnamic acid
Synthesis of N-2- (2-hydroxyethoxy) ethylamide
(1) 4-methoxycinnamic acid
Synthesis of p-nitrophenyl ester

4-methoxycinnamic acid (8.00 g,
33.58 mmol) was dissolved in dimethylformamide (60 mL), N-methylmorpholine (10.6 mL, 98.78 mmol), 1-ethyl-3- (3′-dimethylaminopropyl) carbodiimide (WSC) hydrochloride (9.04 g,
47.14 mmol) was added. After stirring at room temperature for 1 hour, p-nitrophenol (6.56 g, 47.14 mmol) was added. After stirring at room temperature for 2 hours, water was added and the precipitated solid was collected by filtration. The resulting solid was washed with water to give the title compound (8.93 g,
Yield 66%).
¹ H NMR (CDCl ₃ ) δ8.29 (d, J =
9.2Hz, 2H), 7.86 (d, J = 16.0Hz, 1H), 7.56 (d, J = 8.7Hz, 2H), 7.36 (d, J = 9.2Hz,
2H), 6.95 (d, J = 8.7Hz, 2H), 6.48 (d, J = 16.0Hz, 1H), 3.87 (s, 3H).

4-メトキシ桂皮酸 p-ニトロフェニルエステル(1.00g,
3.34mmol)をテトラヒドロフラン(20mL)に懸濁させ、2-(2-アミノエトキシ)エタノール(0.35mL, 3.51mmol)を加えた。室温で5時間撹拌後、溶媒を留去した。得られた残渣をシリカゲルカラムクロマトグラフィー(酢酸エチル⇒クロロホルム/メタノール=30/1)により精製し、標題化合物を得た(0.588g,
収率66%)。
¹H-NMR(DMSO-d₆)δ7.98(t,
J=5.8Hz, 1H), 7.49(d, J=8.7Hz, 2H), 7.35(d, J=16.0Hz, 1H), 6.97(d, J=8.7Hz,
2H), 6.52(d, J=16.0Hz, 1H), 4.51(t, J=5.8Hz, 1H), 3.79(s, 3H), 3.54-3.43(m,
6H), 3.34(dt, J=5.8Hz, J=5.8Hz, 2H). (2) 4-methoxycinnamic acid
Synthesis of N-2- (2-hydroxyethoxy) ethylamide

4-methoxycinnamic acid p-nitrophenyl ester (1.00 g,
3.34 mmol) was suspended in tetrahydrofuran (20 mL), and 2- (2-aminoethoxy) ethanol (0.35 mL, 3.51 mmol) was added. After stirring at room temperature for 5 hours, the solvent was distilled off. The resulting residue was purified by silica gel column chromatography (ethyl acetate => chloroform / methanol = 30/1) to obtain the title compound (0.588 g,
Yield 66%).
¹ H-NMR (DMSO-d ₆ ) δ7.98 (t,
J = 5.8Hz, 1H), 7.49 (d, J = 8.7Hz, 2H), 7.35 (d, J = 16.0Hz, 1H), 6.97 (d, J = 8.7Hz,
2H), 6.52 (d, J = 16.0Hz, 1H), 4.51 (t, J = 5.8Hz, 1H), 3.79 (s, 3H), 3.54-3.43 (m,
6H), 3.34 (dt, J = 5.8Hz, J = 5.8Hz, 2H).

Test Example 1 Absorbance (1)
The ultraviolet absorption spectrum (solvent: water, concentration 10 ppm, optical path length 1 cm) of the cinnamic acid derivative of the present invention was measured with a spectrophotometer (V-560 manufactured by JASCO Corporation). The results are shown in FIGS.

  As is clear from FIGS. 1 and 2, the cinnamic acid derivative of the present invention had excellent absorption ability over a wide ultraviolet wavelength range.

Test Example 2 Comparison of the ultraviolet absorptivity (maximum absorption wavelength and absorption intensity) between the novel cinnamic acid derivative of the present invention and the cinnamic acid derivatives of Patent Documents 3 and 4 is shown in Tables 1 and 2 (the following table numbers) Please change.) The measurement conditions are the same as in Test Example 1.

表１及び表２より明らかなように、本発明の新規な桂皮酸誘導体は特許文献３、４の桂皮酸誘導体と比較して、より強い吸収強度を有していた。このことから、本発明の化合物を製剤中に同一濃度で配合した場合、比較例より強い紫外線防御能を発揮することが期待される。製剤中に配合する紫外線吸収剤の量は系の安定性などから少量であることが望まれるため、より強い吸収強度を持つことは、製剤への配合の点で有利な点と言える。

As is clear from Tables 1 and 2, the novel cinnamic acid derivative of the present invention had stronger absorption strength than the cinnamic acid derivatives of Patent Documents 3 and 4. From this, when the compound of this invention is mix | blended at the same density | concentration in a formulation, it is anticipated that the ultraviolet protection ability stronger than a comparative example is exhibited. Since it is desired that the amount of the ultraviolet absorber to be blended in the preparation is small in view of the stability of the system, it can be said that having a stronger absorption strength is advantageous in terms of blending into the preparation.

Test Example 3 Absorbance (2)
The absorbance (solvent: water, optical path length 1 cm) of 405 nm visible light of the cinnamic acid derivative of the present invention was measured with a spectrophotometer (V-560 manufactured by JASCO Corporation). Further, as a comparative example, 2-hydroxy-4-methoxy-5-sulfoxonium benzophenone sodium, which is a conventional water-soluble ultraviolet absorber, was also measured in the same manner. The results are shown in Table 3.

As is apparent from Table 3, the cinnamic acid derivative of the present invention does not absorb in the visible region longer than 400 nm. Therefore, the crystals were white and the aqueous solution was colorless and transparent.
On the other hand, since the comparative compound has absorption in the visible region, the crystals are colored pale yellow and the aqueous solution is colored yellow, respectively, and the blending amount is limited from the viewpoint of coloring the product, and a sufficient ultraviolet absorption effect cannot be exhibited.

Test Example 4 Solubility in water The solubility of the cinnamic acid derivative of the present invention in water was measured. Moreover, it measured similarly about 2-hydroxy-4-methoxy-5-sulfoxonium benzophenone sodium as a comparative example. The results are shown in Table 4.

Test Example 5 Solubility in ethanol The solubility of the cinnamic acid derivative of the present invention in ethanol was measured. Moreover, it measured similarly about 2-hydroxy-4-methoxy-5-sulfoxonium benzophenone sodium as a comparative example. The results are shown in Table 5.

Test Example 6 Solubility in propylene glycol The solubility of the cinnamic acid derivative of the present invention in propylene glycol was measured. Moreover, it measured similarly about 2-hydroxy-4-methoxy-5-sulfoxonium benzophenone sodium as a comparative example. The results are shown in Table 6.

From the examination results of Test Examples 4 to 6, the cinnamic acid derivatives (1) and (2) of the present invention have extremely high solubility in water, ethanol and propylene glycol, and have a wide range of solubility from water, alcohol and humectants. It was found to have For this reason, the compounding to a product is very easy and versatility is also very high.
On the other hand, since the comparative compound (3) is in a salt form, its solubility in a solvent other than water is very low, and its use is restricted from the viewpoint of product stability.

Test Example 7 Ultraviolet ray prevention effect (i) Test method An actual use test was conducted at the beach in summer. An equal amount of sample was applied to each of the left and right halves of the back of the panel. The degree of sunburn after exposure to direct sunlight was evaluated according to the following criteria. In addition, it carried out by 10 people per group.

(Criteria)
Remarkable: No or almost no sunburn symptoms were observed.
Effective: Mild sunburn was observed.
Invalid: Severe sunburn was observed.
(Judgment)
A: Remarkable or effective subjects are 80% or more.
○: Remarkable or effective subjects are 50% or more and less than 80%.
Δ: Remarkable or effective subjects are 30% or more and less than 50%.
X: Remarkable or effective subjects are less than 30%.

(Ii) Sample preparation (a) Lotion (alcohol phase)
95% ethanol 25.0% by mass
POE (25) hydrogenated castor oil
2.0
Preservative appropriate amount Fragrance appropriate amount (aqueous phase)
Ultraviolet absorber (described in Table 5) 0-10
Glycerin 5.0
Sodium hexametaphosphate Appropriate amount Ion exchange water Residue (Production method)
An aqueous phase and an alcohol phase were prepared and mixed.

(b) Cream stearyl alcohol 7.0% by mass
Stearic acid 2.0
Hydrogenated Lanolin 2.0
Squalane 5.0
2-Octyldodecyl alcohol 6.0
POE (25) cetyl ether
3.0
Glycerin monostearate ester 2.0
Propylene glycol 5.0
Ultraviolet absorber (described in Table 6) 0-10
Perfume proper amount Sodium bisulfite 0.03
Ethylparaben 0.3
Ion-exchanged water residue (production method)
Propylene glycol and an ultraviolet absorber were added to ion-exchanged water and dissolved, and heated to 70 ° C. (water phase). The other components were mixed, heated and melted and kept at 70 ° C. (oil phase). The oil phase was added to the water phase, pre-emulsified, and uniformly emulsified with a homomixer, and then cooled to 30 ° C. while stirring well.

*
紫外線吸収剤が溶解しなかったため測定せず。
** 低温保存で結晶析出。 (Iii) Results (a) Lotion

*
Not measured because the UV absorber did not dissolve.
** Crystallization occurs at low temperature storage.

*
紫外線吸収剤が溶解しなかったため測定せず。
** 低温保存で結晶析出。 (b)
cream

*
Not measured because the UV absorber did not dissolve.
** Crystallization occurs at low temperature storage.

  As is clear from Tables 7 to 8, the external preparation for skin containing the ultraviolet absorbent according to the present invention had an ultraviolet ray preventing effect superior to that obtained when a conventional water-soluble ultraviolet absorbent was blended. In addition, no precipitation of the UV absorber was observed even at low temperature storage.

  As described above, the cinnamic acid derivative of the present invention dissolves in water, and also has extremely high solubility in alcohol and humectant, and has excellent absorption ability over a wide ultraviolet wavelength range. Moreover, since visible light of 400 nm or more is not absorbed at all, it is white, and since the aqueous solution is colorless and transparent, there is no problem of coloring the product. Further, since the solubility in an aqueous solvent is very high, it can be blended in a large amount in the product, and in this case, the problem of precipitation over time does not occur. In addition, the pH of the blending system is not affected. Therefore, it is very excellent as a water-soluble ultraviolet absorber. Therefore, in order to examine whether or not the cinnamic acid derivative of the present invention can be added to a skin external preparation as an ultraviolet absorber, the effects of skin irritation, light stability, and inorganic powder were further examined.

Test Example 8 Skin irritation test The same sample as in Test Example 6 (the blending amount of the UV absorber was 10% by mass) was used.
(I) Patch Test A 24-hour occlusion patch test was conducted with 20 people per group using a fin chamber on the bent side of the forearm of healthy male and female volunteers, and the determination was made according to the following criteria.

(Criteria)
Degree of skin reaction Score
No reaction (negative) 0
Mild erythema (false negative) 1
Erythema (weak positive) 2
Erythema + edema (moderate positive) 3
Erythema + Edema + Papules (strongly positive) 4
Large water bubbles (strongest positive) 5

(Judgment)
The average score was determined and judged according to the following criteria.
A: The average score is 0.
○: The average score is greater than 0 and less than 1.
Δ: The average score is 1 or more and less than 2.
X: The average score is 2 or more.

(result)

  As is apparent from Table 9, it was confirmed that the external preparation for skin containing the ultraviolet absorbent according to the present invention had no skin irritation in the patch test and was very excellent in safety.

Test Example 9 Light Stability Test An aqueous solution of the cinnamic acid derivative of the present invention was exposed to sunlight for 2 weeks (irradiation exposure 80 MJ / m ² ), and then the residual rate and appearance change were examined and an ultraviolet absorption spectrum (solvent: water, concentration) 10 ppm, the optical path length of 1 cm) was measured with a spectrophotometer, and the range of 290 nm to 400 nm of the ultraviolet absorption spectrum was integrated to determine the area value, which was compared with that before exposure to sunlight.

(Judgment)
Changes in the residual ratio and the area value of the ultraviolet absorption spectrum were determined according to the following criteria.
A: 95% or more before sun exposure.
○: 90% or more and less than 95% before sun exposure.
Δ: 70% or more and less than 90% before sun exposure.
X: Less than 70% before sun exposure.

(result)

  As is apparent from Table 10, the cinnamic acid derivative of the present invention was not decomposed by exposure to direct sunlight for a long time as compared with the conventional product, and showed a very high residual rate. Further, there was no change in the shape and area of the ultraviolet absorption spectrum, and no coloration or precipitation was observed in the appearance.

Test Example 10 Stability test when used in combination with an inorganic powder-based ultraviolet shielding agent Sunscreen creams were produced according to the following formulation, stored at 50 ° C. for 2 months, and visually observed for discoloration. We examined the stability when combined with systemic UV screening agents. (The amount of UV absorber is 10% by mass)

(Prescription)
Sunscreen cream (1) Ethylcellulose 1.0% by mass
(2) Ethanol 5.0
(3) 2-ethylhexyl succinate 24.0
(4) Titanium dioxide 1.0
(5) Porous silicic acid powder 1.0
(6) Spherical nylon powder 1.0
(7) Talc 1.0
(8) Sericite 1.0
(9) Boron nitride 1.0
(10) Silicone-treated mica 1.0
(11) Ultraviolet absorber (described in Table 9) 10.0
(12) Carboxymethylcellulose 1.0
(13) Residual ion-exchange water (14) Preservative appropriate amount (15) Fragrance appropriate amount

(result)

As is apparent from Table 11, when the comparative compound was used in combination with the inorganic powder, the yellow color changed deeply, but the cinnamic acid derivative of the present invention did not show any change in color even when the inorganic powder was used in combination.
As described above, the cinnamic acid derivative of the present invention has no skin irritation, is excellent in light stability, and does not cause discoloration when used in combination with inorganic powder. Therefore, the cinnamic acid derivative of the present invention is very useful as an ultraviolet absorber that can be blended into an external preparation for skin.

Examples of the external preparation for skin of the present invention will be described below, but the present invention is not limited to these examples. In addition, all compounding quantities are shown by the mass%.

Example 1 lotion (alcohol phase)
Ethanol 10.0
Oleyl alcohol 0.1
POE (20) sorbitan monolaurate
0.5
POE (15) lauryl ether
0.5
Preservative appropriate amount Fragrance appropriate amount (aqueous phase)
3,4,5-trimethoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 10.0
1,3-butylene glycol 6.0
Glycerin 4.0
4,5-dimorpholino-3-hydroxypyridazine
0.3
Ion-exchanged water residue (production method)
An aqueous phase and an alcohol phase were prepared and mixed.

Example 2 lotion (alcohol phase)
Ethanol 10.0
Oleyl alcohol 0.1
POE (20) sorbitan monolaurate
0.5
POE (15) lauryl ether
0.5
Preservative appropriate amount Fragrance appropriate amount (aqueous phase)
4-methoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 1.0
1,3-butylene glycol 6.0
Glycerin 4.0
4,5-dimorpholino-3-hydroxypyridazine
0.3
Ion-exchanged water residue (production method)
An aqueous phase and an alcohol phase were prepared and mixed.

Example 3 lotion (alcohol phase)
Ethanol 10.0
2-ethylhexyl
2-Cyano-3,3-diphenyl acrylate 0.5
Oleyl alcohol 0.1
POE (20) sorbitan monolaurate
0.5
POE (15) lauryl ether
0.5
Preservative appropriate amount Fragrance appropriate amount (aqueous phase)
3,4,5-trimethoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 5.0
4-methoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 5.0
2-Phenylbenzimidazole-5-sulfonic acid 5.0
1,3-butylene glycol 6.0
Glycerin 4.0
Terephthalylidene dicamphulsulfonic acid 1.0
4,5-dimorpholino-3-hydroxypyridazine
0.3
Ion-exchanged water residue (production method)
An aqueous phase and an alcohol phase were prepared and mixed.

Example 4 Lotion (alcohol phase)
Ethanol 10.0
Paramethoxycinnamic acid 2-ethylhexyl ester 0.5
2-Ethylhexyl 2-cyano-3,3-diphenyl acrylate 0.5
2-hydroxy-4-methoxybenzophenone
0.5
4-tert-butyl-4'-methoxydibenzoylmethane
0.5
POE (20) oleyl ether
0.5
Preservative appropriate amount Fragrance appropriate amount (aqueous phase)
Dipropylene glycol 6.0
Sorbit 4.0
PEG 1500 5.0
3,4,5-trimethoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 10.0
4-methoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 10.0
Terephthalylidene dicamphulsulfonic acid 1.0
Methylcellulose 0.2
Quince Seed 0.1
Ion-exchanged water residue (production method)
Methyl cellulose and quince seeds were mixed and stirred in a portion of ion-exchanged water to prepare a viscous liquid. The remainder of the ion exchange water and the other aqueous phase components were mixed and dissolved, and the viscous liquid was added thereto to obtain a uniform aqueous phase. After the alcohol phase was prepared, it was added to the aqueous phase and mixed.

Example 5 Lotion (alcohol phase)
Ethanol 10.0
Paramethoxycinnamic acid 2-ethylhexyl ester 0.5
4-tert-butyl-4'-methoxydibenzoylmethane
0.5
POE (20) oleyl ether
0.5
Preservative appropriate amount Fragrance appropriate amount (aqueous phase)
Dipropylene glycol 6.0
Sorbit 4.0
PEG 1500 5.0
3,4,5-trimethoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 7.0
4-methoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 7.0
Methylcellulose 0.2
Quince Seed 0.1
Ion-exchanged water residue (production method)
Methyl cellulose and quince seeds were mixed and stirred in a portion of ion-exchanged water to prepare a viscous liquid. The remainder of the ion exchange water and the other aqueous phase components were mixed and dissolved, and the viscous liquid was added thereto to obtain a uniform aqueous phase. After the alcohol phase was prepared, it was added to the aqueous phase and mixed.

Example 6 Cream Stearic Acid 5.0
Stearyl alcohol 4.0
Isopropyl myristate 18.0
Glycerol monostearate 3.0
Paramethoxycinnamic acid 2-ethylhexyl ester 10.0
2-Ethylhexyl 2-cyano-3,3-diphenyl acrylate 5.0
4-tert-butyl-4'-methoxydibenzoylmethane
3.0
Propylene glycol 10.0
3,4,5-trimethoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 5.0
Terephthalylidene dicamphulsulfonic acid 0.5
2-Phenylbenzimidazole-5-sulfonic acid 1.0
4,5-dimorpholino-3-hydroxypyridazine
0.2
Potassium hydroxide 0.2
Sodium bisulfite 0.01
Preservative appropriate amount Fragrance appropriate amount Ion-exchange water Residue
Propylene glycol, 3,4,5-trimethoxycinnamic acid N-2- (2-hydroxyethoxy) ethylamide, terephthalylidene dicamphorsulfonic acid, 2-phenylbenzimidazole-5-sulfonic acid, and hydroxylated ion-exchanged water Potassium was added to dissolve and heated to maintain at 70 ° C. (aqueous phase). The other components were mixed, heated and melted and kept at 70 ° C. (oil phase). The oil phase was gradually added to the aqueous phase to pre-emulsify it, and the mixture was uniformly emulsified with a homomixer, and then cooled to 30 ° C. while stirring well.

Example 7 Cream Stearic Acid 5.0
Stearyl alcohol 4.0
Isopropyl myristate 18.0
Glycerol monostearate 3.0
Paramethoxycinnamic acid 2-ethylhexyl ester 10.0
2-Ethylhexyl 2-cyano-3,3-diphenyl acrylate 10.0
4-tert-butyl-4'-methoxydibenzoylmethane
3.0
Propylene glycol 10.0
3,4,5-trimethoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 5.0
4-methoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 5.0
Terephthalylidene dicamphulsulfonic acid 0.5
2-Phenylbenzimidazole-5-sulfonic acid 0.5
4,5-dimorpholino-3-hydroxypyridazine
0.2
Potassium hydroxide 0.2
Sodium bisulfite 0.01
Preservative Appropriate amount Fragrance Appropriate amount Ion-exchange water Residue (Production method)
Propylene glycol, 3,4,5-trimethoxycinnamic acid N-2- (2-hydroxyethoxy) ethylamide, 4-methoxycinnamic acid N-2- (2-hydroxyethoxy) ethylamide, terephthalylidene dicamphor in ion-exchanged water Sulfonic acid, 2-phenylbenzimidazole-5-sulfonic acid and potassium hydroxide were added and dissolved, and the mixture was heated and maintained at 70 ° C. (aqueous phase). The other components were mixed, heated and melted and kept at 70 ° C. (oil phase). The oil phase was gradually added to the aqueous phase to pre-emulsify it, and the mixture was uniformly emulsified with a homomixer, and then cooled to 30 ° C. while stirring well.

Example 8 Cream Stearic Acid 5.0
Stearyl alcohol 4.0
Isopropyl myristate 18.0
Glycerol monostearate 3.0
Paramethoxycinnamic acid 2-ethylhexyl ester 10.0
2-Ethylhexyl 2-cyano-3,3-diphenyl acrylate 10.0
4-tert-butyl-4'-methoxydibenzoylmethane
3.0
Propylene glycol 10.0
4-methoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 3.0
Terephthalylidene dicamphulsulfonic acid 0.5
4,5-dimorpholino-3-hydroxypyridazine
0.2
Potassium hydroxide 0.2
Sodium bisulfite 0.01
Preservative Appropriate amount Fragrance Appropriate amount Ion-exchange water Residue (Production method)
Propylene glycol, 4-methoxycinnamic acid N-2- (2-hydroxyethoxy) ethylamide and potassium hydroxide were dissolved in ion-exchanged water, heated and kept at 70 ° C. (aqueous phase). The other components were mixed, heated and melted and kept at 70 ° C. (oil phase). The oil phase was gradually added to the aqueous phase to pre-emulsify it, and the mixture was uniformly emulsified with a homomixer, and then cooled to 30 ° C. while stirring well.

Example 9 Cream Stearic Acid 6.0
Sorbitan monostearate ester 2.0
POE (20) sorbitan monostearate
1.5
Propylene glycol 10.0
3,4,5-trimethoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 10.0
4-methoxycinnamic acid
N-2- (2-hydroxyethoxy) ethylamide 10.0
Glycerin trioctanoate 10.0
Squalene 5.0
Sodium bisulfite 0.01
Ethylparaben 0.3
Perfume appropriate amount Ion exchange water Residue
Add and dissolve propylene glycol and 3,4,5-trimethoxycinnamic acid N-2- (2-humanoxyethoxy) ethylamid and 4-methoxycinnamic acid N-2- (2-humanoxyethoxy) ethylamid in ion-exchanged water, Heated and kept at 70 ° C. (aqueous phase). The other components were mixed, heated and melted and kept at 70 ° C. (oil phase). The oil phase was gradually added to the aqueous phase, pre-emulsified, and uniformly emulsified with a homomixer, and then cooled to 30 ° C. while stirring well.

Example 10 Cream Stearic Acid 6.0
Sorbitan monostearate ester 2.0
POE (20) sorbitan monostearate
1.5
Propylene glycol 10.0
3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 5.0
4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 5.0
Glycerin trioctanoate 10.0
Squalene 5.0
Sodium bisulfite 0.01
Ethylparaben 0.3
Perfume Appropriate amount Ion exchange water Residue (Production method)
Add and dissolve propylene glycol and 3,4,5-trimethoxycinnamic acid N-2- (2-humanoxyethoxy) ethylamid and 4-methoxycinnamic acid N-2- (2-humanoxyethoxy) ethylamid in ion-exchanged water, Heated and kept at 70 ° C. (aqueous phase). The other components were mixed, heated and melted and kept at 70 ° C. (oil phase). The oil phase was gradually added to the aqueous phase, pre-emulsified, and uniformly emulsified with a homomixer, and then cooled to 30 ° C. while stirring well.

Example 11 Latex Stearic acid 2.5
Cetyl alcohol 1.5
Vaseline 5.0
Liquid paraffin 10.0
POE (10) monooleate
2.0
Paramethoxycinnamic acid 2-ethylhexyl ester 3.0
2-Ethylhexyl 2-Cyano-3,3-diphenyl acrylate 3.0
4-tert-butyl-4'-methoxydibenzoylmethane
2.0
PEG 1500 3.0
Triethanolamine 1.0
3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 3.0
Terephthalylidene dicamphulsulfonic acid 0.5
4,5-dimorpholino-3-hydroxypyridazine
0.1
Sodium bisulfite 0.01
Ethylparaben 0.3
Carboxyvinyl polymer 0.05
Perfume Appropriate amount Ion exchange water Residue (Production method)
Carboxyvinyl polymer was dissolved in a small amount of ion-exchanged water (A phase). Add PEG 1500, 3,4,5-trimethoxycinnamic acid N-2- (2-Hydroxyethoxy) ethylamido, 4,5-dimorpholino-3-hydroxypyridazine and triethanolamine to the balance of ion-exchanged water, dissolve with heating. Maintained at 70 ° C. (aqueous phase). The other components were mixed, heated and melted and kept at 70 ° C. (oil phase). The oil phase was added to the aqueous phase for pre-emulsification, and the A phase was added and uniformly emulsified with a homomixer, and then cooled to 30 ° C. while stirring well.

Example 12 Latex Stearic acid 2.5
Cetyl alcohol 1.5
Vaseline 5.0
Liquid paraffin 10.0
POE (10) monooleate
2.0
Paramethoxycinnamic acid 2-ethylhexyl ester 3.0
2-Ethylhexyl 2-cyano-3,3-diphenyl acrylate 5.0
2-hydroxy-4-methoxybenzophenone
2.0
4-tert-butyl-4'-methoxydibenzoylmethane
2.0
PEG 1500 3.0
Triethanolamine 1.0
4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
Terephthalylidene dicamphulsulfonic acid 0.5
2-Phenylbenzene imidazole-5-sulfonic acid
4,5-dimorpholino-3-hydroxypyridazine
0.1
Sodium bisulfite 0.01
Ethylparaben 0.3
Carboxyvinyl polymer 0.05
Perfume Appropriate amount Ion exchange water Residue (Production method)
Carboxyvinyl polymer was dissolved in a small amount of ion-exchanged water (A phase). PEG 1500, 4-methoxycinnamic acid N-2- (2-Hydroxyethoxy) ethylamid, terephthalylidene dican full sulfonic acid, 2-phenylbenzene imidazole-5-sulfonic acid, 4,5-dimorpholino- 3-hydroxypyridazine and triethanolamine were added, dissolved by heating and kept at 70 ° C. (aqueous phase). The other components were mixed, heated and melted and kept at 70 ° C. (oil phase). The oil phase was added to the aqueous phase for pre-emulsification, and the A phase was added and uniformly emulsified with a homomixer, and then cooled to 30 ° C. while stirring well.

Example 13 Latex Stearic acid 2.5
Cetyl alcohol 1.5
Vaseline 5.0
Liquid paraffin 10.0
POE (10) monooleate
2.0
Paramethoxycinnamic acid 2-ethylhexyl ester 3.0
4-tert-butyl-4'-methoxydibenzoylmethane
2.0
PEG 1500 3.0
Triethanolamine 1.0
4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido
1.0
3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
Terephthalylidene dicamphulsulfonic acid 0.5
4,5-dimorpholino-3-hydroxypyridazine
0.1
Sodium bisulfite 0.01
Ethylparaben 0.3
Carboxyvinyl polymer 0.05
Perfume Appropriate amount Ion exchange water Residue (Production method)
Carboxyvinyl polymer was dissolved in a small amount of ion-exchanged water (A phase). PEG 1500, 4-methoxycinnamic acid N-2- (2-Hydroxyethoxy) ethylamid, 3,4,5-trimethoxycinnamic acid N-2- (2-Hydroxyethoxy) ethylamid, 4,5- Dimorpholino-3-hydroxypyridazine and triethanolamine were added, dissolved by heating and kept at 70 ° C. (aqueous phase). The other components were mixed, heated and melted and kept at 70 ° C. (oil phase). The oil phase was added to the aqueous phase for pre-emulsification, and the A phase was added and uniformly emulsified with a homomixer, and then cooled to 30 ° C. while stirring well.

Example 14 Gel 95% ethanol 10.0
Dipropylene glycol 15.0
POE (50) oleyl ether
2.0
Carboxyvinyl polymer 1.0
Sodium hydroxide 0.15
3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
2-Phenylbenzene imidazole-5-sulfonic acid 1.0
Methylparaben 0.2
Perfume Appropriate amount Ion exchange water Residue (Production method)
The carboxyvinyl polymer was uniformly dissolved in ion-exchanged water (A phase). POE (50) oleyl ether was dissolved in 95% ethanol and added to Phase A. After adding components other than sodium hydroxide, sodium hydroxide was added to increase the neutralization and viscosity.

Example 15 Gel 95% ethanol 10.0
Dipropylene glycol 15.0
POE (50) oleyl ether
2.0
Carboxyvinyl polymer 1.0
Sodium hydroxide 0.15
3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido
1.0
Methylparaben 0.2
Perfume Appropriate amount Ion exchange water Residue (Production method)
The carboxyvinyl polymer was uniformly dissolved in ion-exchanged water (A phase). POE (50) oleyl ether was dissolved in 95% ethanol and added to Phase A. After adding components other than sodium hydroxide, sodium hydroxide was added to increase the neutralization and viscosity.

Example 16 serum (phase A)
95% ethanol 10.0
Paramethoxycinnamic acid 2-ethylhexyl ester 1.0
4-tert-butyl-4'-methoxydibenzoylmethane
0.5
POE (20) octyldodecanol
1.0
Methylparaben 0.15
Pantothenyl ethyl ether 0.1
(Phase B)
Potassium hydroxide 0.1
(Phase C)
3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 5.0
4-Methoxycinnamic acid N-2- (2-Hydroxyethoxy) ethylamid 5.0
2-Phenylbenzene imidazole-5-sulfonic acid 1.0
Glycerin 5.0
Dipropylene glycol 10.0
Terephthalylidene dican full sulfonic acid 2.0
Sodium bisulfite 0.03
Carboxyvinyl polymer 0.2
Ion-exchanged water residue (production method)
The A phase and the C phase were uniformly dissolved, and the A phase was added to the C phase and solubilized. Then phase B was added and mixed.

Example 17 serum (phase A)
95% ethanol 10.0
Paramethoxycinnamic acid 2-ethylhexyl ester 1.0
2-Ethylhexyl 2-cyano-3,3-diphenyl acrylate 1.0
4-tert-butyl-4'-methoxydibenzoylmethane
0.5
POE (20) octyldodecanol
1.0
Methylparaben 0.15
Pantothenyl ethyl ether 0.1
(Phase B)
Potassium hydroxide 0.1
(Phase C)
3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 5.0
4-Methoxycinnamic acid N-2- (2-Hydroxyethoxy) ethylamid 5.0
Glycerin 5.0
Dipropylene glycol 10.0
Terephthalylidene dicamphorsulfonic acid 3.0
Sodium bisulfite 0.03
Carboxyvinyl polymer 0.2
Ion-exchanged water residue (production method)
The A phase and the C phase were uniformly dissolved, and the A phase was added to the C phase and solubilized. Then phase B was added and mixed.

Example 18 Self-tanning emulsion (Part 1)
2-Ethylhexyl 2-cyano-3,3-diphenyl acrylate 5.0
PEG-5 glyceryl stearate
1.0
PEG-60 glycerin stearate
2.0
Cyclomethicone
5.0
Diisopropyl sebacate
5.0
Behenyl alcohol
2.0
Stearyl alcohol
1.0
Hydrogenated palm oil
2.0
Fragrance
Appropriate amount (part 2)
3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido
1.0
Dihydroxyacetone 5.0
Dipotassium glycyrrhizinate 0.01
Ethanol 5.0
1,3 Butylene glycol 5.0
EDTA-3Na 0.1
Sodium pyrosulfite 0.1
Paraben Appropriate amount of ion-exchanged water

The part 1 uniformly dissolved at 70 ° C. is added to the part 2 uniformly dissolved at 60 ° C., and emulsification is performed. Thereafter, it is cooled to obtain a self-tanning emulsion.

Example 19 Pack (Phase A)
Dipropylene glycol 5.0
POE (60) hydrogenated castor oil
5.0
(Phase B)
Olive oil 5.0
Tocopherol acetate 0.2
Ethylparaben 0.2
Fragrance 0.2
(Phase C)
3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 0.1
4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido
0.1
Sodium bisulfite 0.03
Polyvinyl alcohol
(Degree of saponification 90, degree of polymerization 2000) 13.0
Ethanol 7.0
Ion-exchanged water residue (production method)
A phase, B phase, and C phase were uniformly dissolved, and B phase was added to A phase to solubilize. This was then added to Phase C and mixed.

Example 20 Pack (Phase A)
Dipropylene glycol 5.0
POE (60) hydrogenated castor oil
5.0
(Phase B)
Olive oil 5.0
Tocopherol acetate 0.2
Ethylparaben 0.2
Fragrance 0.2
(Phase C)
3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 0.1
4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 0.1
Sodium bisulfite 0.03
Polyvinyl alcohol
(Degree of saponification 90, degree of polymerization 2000) 13.0
Ethanol 7.0
Ion-exchanged water residue (production method)
A phase, B phase, and C phase were uniformly dissolved, and B phase was added to A phase to solubilize. This was then added to Phase C and mixed.

Examples 1 to 20 all had an excellent ultraviolet ray preventing effect. In Examples 1 to 20, no skin trouble was observed.

Example 21 Latex (oil phase)
Stearyl alcohol 1.5
Squalene 2.0
Vaseline 2.5
Deodorized liquid lanolin 1.5
Evening primrose oil 2.0
Isopropyl myristate 5.0
Glycerol monooleate 2.0
POE (60) hardened castor
2.0
Tocopherol acetate 0.05
Ethylparaben 0.2
Butylparaben 0.1
Perfume appropriate amount (water phase)
3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 5.0
4-Methoxycinnamic acid N-2- (2-Hydroxyethoxy) ethylamido
5.0
4,5-dimorpholino-3-hydroxypyridazine
0.05
Sodium bisulfite 0.01
Glycerin 5.0
Sodium hyaluronate 0.01
Carboxyvinyl polymer 0.2
Potassium hydroxide 0.2
Ion-exchanged water residue (production method)
The oil phase and the aqueous phase were each dissolved at 70 ° C, the oil phase was mixed with the aqueous phase, emulsified with an emulsifier, and then cooled to 30 ° C with a heat exchanger.

The emulsion of Example 21 also had an excellent UV protection effect and no skin trouble was observed.

Example 22 Solid Powder Foundation (1) Talc 15.0
(2) Sericite 10.0
(3) Spherical nylon powder 10.0
(4) Porous silicic acid powder 15.0
(5) Boron nitride 5.0
(6) Titanium dioxide 5.0
(7) Iron oxide 3.0
(8) Zinc stearate 5.0
(9) 3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
(10) 4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
(11) Liquid paraffin residue
(12) Triisooctanoic acid glycerin 15.0
(13) Sorbitan sesquioleate 1.5
(14) Preservative appropriate amount (15) Fragrance appropriate amount
(Manufacturing method)
The components (1) to (8) were mixed and pulverized, and the components (9) to (15) were mixed and mixed with stirring. The resulting mixture was molded into a container to obtain a solid foundation. .

Example 23 Solid Powder Foundation (1) Talc 15.0
(2) Sericite 10.0
(3) Spherical nylon powder 10.0
(4) Porous silicic acid powder 15.0
(5) Boron nitride 5.0
(6) Titanium dioxide 5.0
(7) Iron oxide 3.0
(8) Zinc stearate 5.0
(9) 3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
(10) 4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
(11) Liquid paraffin residue
(12) Triisooctanoic acid glycerin 15.0
(13) Sorbitan sesquioleate 1.5
(14) Preservative appropriate amount (15) Fragrance appropriate amount
(Manufacturing method)
The components (1) to (8) were mixed and pulverized, and then the components (9) to (15) were mixed and stirred and mixed, and molded into a container to obtain a solid foundation. .

Example 24 Water-in-oil emulsification foundation (1) Spherical nylon 10.0
(2) Porous silicic acid powder 8.0
(3) Mica titanium 2.0
(4) Silicone-treated sericite 2.0
(5) Silicone-treated mica 12.0
(6) Silicone-treated titanium dioxide 5.0
(7) Silicone-treated iron oxide 2.0
(8) Ion exchange water Residue (9) 3,4,5-Trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 5.0
(10) 4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
(11) Decamethylcyclopentanesiloxane 18.0
(12) Dimethylpolysiloxane 5.0
(13) Squalane 1.0
(14) Polyoxyethylene-modified dimethylpolysiloxane 2.0
(15) Paramethoxycinnamic acid 2-ethylhexyl ester 3.0
(16) 4-tert-butyl-4′-methoxydibenzoylmethane 0.5
(17) Terephthalylidene dicamphorsulfonic acid 0.5
(18) Preservative appropriate amount (19) Fragrance appropriate amount (Manufacturing method)
The components (11) to (19) were uniformly mixed and dissolved, and then mixed and ground (1) to (7) were added and dispersed. To this dispersion, (9) and (10) dissolved in (8) were added and emulsified, and filled into a container to obtain a water-in-oil emulsified foundation.

Example 25 Water-in-oil emulsification foundation (1) Spherical nylon 10.0
(2) Porous silicic acid powder 8.0
(3) Mica titanium 2.0
(4) Silicone-treated sericite 2.0
(5) Silicone-treated mica 12.0
(6) Silicone-treated titanium dioxide 5.0
(7) Silicone-treated iron oxide 2.0
(8) Ion exchange water Residue (9) 3,4,5-Trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 3.0
(10) Decamethylcyclopentanesiloxane 18.0
(11) Dimethylpolysiloxane 5.0
(12) Squalane 1.0
(13) Polyoxyethylene-modified dimethylpolysiloxane 2.0
(14) Paramethoxycinnamic acid 2-ethylhexyl ester 3.0
(15) 2-Ethylhexyl
2-Cyano-3,3-diphenyl acrylate 3.0
(16) 2-hydroxy-4-methoxybenzophenone 1.0
(17) 4-tert-Butyl-4'-methoxydibenzoylmethane
0.5
(18) Terephthalylidene dicamphorsulfonic acid 0.5
(19) Preservative appropriate amount (20) Fragrance appropriate amount (Manufacturing method)
The components (10) to (20) were uniformly mixed and dissolved, and then mixed and ground (1) to (7) were added and dispersed. To this dispersion, (9) dissolved in (8) was added and emulsified, and filled into a container to obtain a water-in-oil emulsified foundation.

Example 26 White powder (1) Talc residue (2) Sericite 10.0
(3) Spherical nylon powder 10.0
(4) Boron nitride 5.0
(5) Iron oxide 3.0
(6) Magnesium carbonate 5.0
(7) Squalane 3.0
(8) Glycerin triisooctanoate 2.0
(9) Sorbitan sesquioleate 2.0
(10) 3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 0.5
(11) 4-Methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 0.5
(12) Preservative appropriate amount (13) Fragrance appropriate amount (Manufacturing method)
What mixed each component of (7)-(13) was added to the place which mixed and grind | pulverized each component of (1)-(6), and was stirred and mixed, and white powder was obtained.

Example 27 Eye Shadow
(1) Remaining talc (2) Mica 15.0
(3) Spherical nylon powder 10.0
(4) Boron nitride 5.0
(5) Iron oxide 3.0
(6) Titanium oxide coated mica 5.0
(7) Squalane 3.0
(8) Glycerin triisooctanoate 2.0
(9) Sorbitan sesquioleate 2.0
(10) 3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 0.3
(11) 4-Methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 0.3
(12) Preservative appropriate amount (13) Fragrance appropriate amount (Manufacturing method)
To each of the components (1) to (6) mixed and pulverized, a mixture of the components (7) to (13) was added and stirred to obtain an eye shadow.

Example 28 Lipstick (1) Carnauba 0.5
(2) Candelilla wax 5.0
(3) Ceresin 10.0
(4) Squalane residue (5) Glycerol triisostearate 10.0
(6) Glycerin diisostearate 20.0
(7) Terephthalylidene dicamphorsulfonic acid 0.5
(8) Paramethoxycinnamic acid 2-ethylhexyl ester 3.0
(9) 2-Ethylhexyl
2-Cyano-3,3-diphenyl acrylate 3.0
(10) 3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 3.0
(11) 4-Methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 3.0
(12) Macadamia nut oil fatty acid cholesteryl 4.0
(13) Synthetic sodium silicate-magnesium 0.5
(14) Hydrophobic silica 0.5
(15) Ion exchange water 2.0
(16) Colorant appropriate amount (17) Preservative appropriate amount (18) Fragrance appropriate amount (Manufacturing method)
(13) and (14) were dispersed in (12) heated to 60 ° C., and (10), (11) and (15) were added to this and sufficiently stirred. Separately, this was added to (1) to (9), which had been heated and dissolved, and stirred sufficiently. Further, (16) to (18) were added, dispersed and stirred, and then molded to obtain a lipstick.

Example 29 Lipstick (1) Carnauba 0.5
(2) Candelilla wax 5.0
(3) Ceresin 10.0
(4) Squalane residue (5) Glycerol triisostearate 10.0
(6) Glycerin diisostearate 20.0
(7) Terephthalylidene dicamphorsulfonic acid 0.5
(8) Paramethoxycinnamic acid 2-ethylhexyl ester 3.0
(9) 3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 2.0
(10) Macadamia nut oil fatty acid cholesteryl 4.0
(11) Synthetic sodium silicate-magnesium 0.5
(12) Hydrophobic silica 0.5
(13) Ion exchange water 2.0
(14) Coloring agent appropriate amount (15) Preservative appropriate amount (16) Fragrance appropriate amount (Manufacturing method)
(11) and (12) were dispersed in (10) heated to 60 ° C., and (9) and (13) were added thereto, followed by thorough stirring. Separately, this was added to (1) to (8), which had been heated and dissolved, and stirred well. Further, (14) to (16) were added and dispersed and stirred, and then molded to obtain a lipstick.

The makeup cosmetics of Examples 22 to 29 all had an excellent ultraviolet protection effect, and skin troubles, discoloration over time, etc. were not observed.

Example 30 Hair foam (stock solution formulation)
(1) Acrylic resin alkanolamine liquid (50%) 8.0
(2) Polyoxyethylene hydrogenated castor oil appropriate amount (3) Liquid paraffin 5.0
(4) Glycerin 3.0
(5) Perfume appropriate amount (6) Preservative appropriate amount (7) Ethanol 15.0
(8) 3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 7.0
(9) 4-Methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 7.0
(10) Residual ion exchange water (filling formula)
(1) Stock solution 90.0
(2) Liquefied petroleum gas 10.0
(Manufacturing method)
Liquid paraffin was added to a glycerin and polyoxyethylene hydrogenated castor oil solution and uniformly emulsified with a homomixer. This was added to the solution of the other ingredients. For filling, the stock solution was filled in the can, and after the valve was mounted, the gas was filled.

Example 31 Hair foam (stock solution formulation)
(1) Acrylic resin alkanolamine liquid (50%) 8.0
(2) Polyoxyethylene hydrogenated castor oil appropriate amount (3) Liquid paraffin 5.0
(4) Glycerin 3.0
(5) Perfume appropriate amount (6) Preservative appropriate amount (7) Ethanol 15.0
(8) 3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 3.0
(9) Ion exchange water residue (filling formula)
(1) Stock solution 90.0
(2) Liquefied petroleum gas 10.0
(Manufacturing method)
Liquid paraffin was added to a glycerin and polyoxyethylene hydrogenated castor oil solution and uniformly emulsified with a homomixer. This was added to the solution of the other ingredients. For filling, the stock solution was filled in the can, and after the valve was mounted, the gas was filled.

Example 32 Hair Liquid (1) Polyoxypropylene (40) Butyl Ether 20.0
(2) Polyoxyethylene hydrogenated castor oil 1.0
(3) Ethanol 50.0
(4) Perfume appropriate amount (5) Preservative appropriate amount
(6) 2-methoxyhexyl ester of paramethoxycinnamic acid 2.0
(7) 2-Ethylhexyl
2-Cyano-3,3-diphenyl acrylate 2.0
(8) Dye proper amount
(9) 3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
(10) 4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
(11) Residue of ion-exchanged water (Production method)
Polyoxypropylene (40) butyl ether, polyoxyethylene hydrogenated castor oil, fragrance, preservative, paramethoxycinnamic acid 2-ethylhexyl ester, 2-ethylhexyl 2-cyano-3,3-diphenyl acrylate were dissolved in ethanol. 3,4,5-Trimethoxycinnamic acid in ion-exchanged water N-2- (2-Hydroxyethoxy) ethylamido, 4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido and the dye were dissolved. The aqueous phase was added to the ethanol phase and filtered through filter paper.

Example 33 Hair spray (stock solution formulation)
(1) Acrylic resin alkanolamine liquid (50%) 7.0
(2) Cetyl alcohol 0.1
(3) Silicone oil 0.3
(4) Ethanol residue (5) Perfume appropriate amount (6) 3,4,5-trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
(7) 4-Methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
(8) Ion exchange water 3.0
(Filling prescription)
(1) Stock solution 50.0
(2) Liquefied petroleum gas 50.0
(Manufacturing method)
Other components were added to ethanol, dissolved, and filtered. For filling, the stock solution was filled in the can, and after the valve was mounted, the gas was filled.

Example 34 Hair Tonic (1) 3,4,5-Trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido 3.0
(2) Hardened castor oil ethylene oxide (40 mol) adduct 2.0
(3) Paramethoxycinnamic acid 2-ethylhexyl ester 3.0
(4) 2-ethylhexyl
2-Cyano-3,3-diphenyl acrylate 3.0
(5) 4-tert-butyl-4′-methoxydibenzoylmethane 3.0
(6) Terephthalylidene dicamphorsulfonic acid 1.0
(7) 2-Phenylbenzene imidazole-5-sulfonic acid 1.0
(8) Ethanol 60.0
(9) Perfume appropriate amount (10) Residual ion exchange water (Production method)
Hydrogenated castor oil ethylene oxide (40 mol) adduct in ethanol, paramethoxycinnamic acid 2-ethylhexyl ester, 2-ethylhexyl 2-cyano-3,3-diphenyl acrylate, 4-tert-butyl-4'-methoxydibenzoylmethane and Phthalylidene dicamphor sulfonic acid and 2-phenyl benzimidazol-5-sulfonic acid were dissolved. 3,4,5-Trimethoxycinnamic acid in ion-exchanged water
N-2- (2-Hydroxyethoxy) ethylamido was dissolved. The ethanol phase and the aqueous phase were mixed and the fragrance was added.

Example 35 Hair Tonic (1) 3,4,5-Trimethoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 2.0
(2) 4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamid 1.0
(2) Hardened castor oil ethylene oxide (40 mol) adduct 2.0
(3) Paramethoxycinnamic acid 2-ethylhexyl ester 3.0
(4) 4-tert-butyl-4'-methoxydibenzoylmethane
3.0
(5) Ethanol 60.0
(6) Appropriate perfume (7) Residual ion-exchanged water (Production method)
Hardened castor oil ethylene oxide (40 mol) adduct, 2-methoxyhexyl paramethoxycinnamate, and 4-tert-butyl-4′-methoxydibenzoylmethane were dissolved in ethanol. 3,4,5-Trimethoxycinnamic acid in ion-exchanged water N-2- (2-Hydroxyethoxy) ethylamido and 4-methoxycinnamic acid
N-2- (2-Hydroxyethoxy) ethylamido was dissolved. The ethanol phase and the aqueous phase were mixed and the fragrance was added.

The cosmetics for hair and scalp of Examples 30 to 35 all had an excellent UV protection effect, and no scalp trouble or discoloration over time was observed.

FIG. 3 is a diagram showing an ultraviolet absorption spectrum of a novel cinnamic acid derivative of the present invention, 3,4,5-trimethoxycinnamic acid N-2- (2-humanoxyethoxy) ethylamid. FIG. 2 is a graph showing an ultraviolet absorption spectrum of a novel cinnamic acid derivative of the present invention, 4-methoxycinnamic acid N-2- (2-humanoxyethoxy) ethylamid.

Claims (7)

The following cinnamic acid derivative (1) and salts thereof

(1)
(In the formula, R ₁ , R ₂ and R ₃ each independently represents a hydrogen atom or a methoxy group, and either R ₄ or R ₅ represents — {(CH ₂ ) _m —O} _n —R _6. And the other represents a hydrogen atom or a methyl group, R ₆ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, m represents 2 to 4, and n represents 1 to 5.) The cinnamic acid derivative and the salt thereof according to claim 1, wherein R ₅ is a hydrogen atom, R ₆ is a hydrogen atom, m is 2, and n is 2, and the following cinnamic acid derivative (2) and a salt thereof.

(2)
(Wherein R ₁ , R ₂ and R ₃ each independently represents a hydrogen atom or a methoxy group.) An ultraviolet absorber comprising the cinnamic acid derivative according to claim 1 or 2 and a salt thereof. A UV-absorbing composition comprising the cinnamic acid derivative according to claim 1 or 2 and a salt thereof. A skin external preparation comprising the cinnamic acid derivative according to claim 1 or 2 and a salt thereof. The skin external preparation according to claim 5, further comprising an inorganic powder. A method for using the external preparation for skin according to claim 5 or 6 on a human body as a cosmetic composition.

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