JP6136129B2 - Skin lotion for UV protection - Google Patents

Description

The present invention, fresh feel when applied directly to the skin, together with the elongation is smooth, after familiar to the skin, sticky feeling, dry feeling, hardly gives stagnation, cosmetic glue good UV protective skin lotion It is about.

  When ultraviolet rays hit the skin, it generates active oxygen and lipid peroxide, which adversely affects the skin. Ultraviolet rays are divided into A wave, B wave, and C wave depending on the wavelength region. The C wave (100 to 290 nm) in the shortest wavelength region has a large energy, but is almost absorbed before reaching the ground surface. On the other hand, the A wave (320 to 400 nm) and the B wave (290 to 320 nm) reach the earth's surface and adversely affect the skin. The A wave reaches the inside of the skin and causes wrinkles, and the B wave temporarily causes a slight burn on the surface of the skin and blackens the skin.

  In order to prevent such adverse effects due to ultraviolet rays, ultraviolet scattering agents such as titanium oxide and zinc oxide, and ultraviolet absorbers such as benzophenone derivatives are useful. It has been developed (Patent Documents 1, 2, and 3).

  However, the ultraviolet light scattering agent does not provide a cosmetic material that is sufficiently satisfactory in use feeling, such as giving a heavy feeling during use, a squeaky feeling, a dry feeling and a clogging feeling after use, and a white finish. In order to solve these problems, a finely-divided UV scattering agent and a surface-coated one have been developed, but no cosmetics that are sufficiently satisfactory in terms of use feeling have been obtained (Patent Document 3). ).

  On the other hand, the UV absorber gives a characteristic odor and heavy feel during use, and stickiness and roughness after use. Therefore, there has been proposed a skin cosmetic for preventing ultraviolet rays by encapsulating an ultraviolet absorbent so that the ultraviolet absorbent does not directly contact the skin and does not adversely affect the skin (Patent Documents 4, 5, and 6).

  According to these UV-preventive skin cosmetics, by encapsulating the UV absorber, compatibility with other compounding components is improved, so that it can be easily blended into cosmetics, and the contained UV rays Since the stability of the absorbent is improved, there is an advantage that it is not necessary to add a stabilizer or the like. However, cosmetics containing this encapsulated UV absorber have a feeling when used, for example, a fresh feeling when applied directly to the skin, a smoothness of spreading, a sticky feeling after use, a feeling of dryness, and a feeling of blockage. It was not satisfactory in terms of feeling of use and makeup.

JP-A-8-259419 JP 2010-111626 A JP 2008-208044 A JP 2001-049233 A JP 2001-106612 A JP 2006-176449 A

  It is an object of the present invention to provide an anti-ultraviolet skin that has a fresh feel when applied directly to the skin, has a smooth spread, is less likely to give a sticky feeling, a dry feeling, and an obstructive feeling after being applied to the skin, and has a good makeup paste It is to provide cosmetics.

When the present inventors to solve the above problems have repeated research by combining each particular ratio specific three components and water shown below, the anti-ultraviolet skin lotion of interest is obtained As a result, the present invention has been completed.

That is, the skin lotion for preventing ultraviolet rays of the present invention comprises (a) 1 to 13% by mass of a microcapsule of an average particle size of 0.1 to 10 μm encapsulating an ultraviolet absorber, and (b) Formula (I). It contains 0.5 to 8 % by mass of the compound shown, (c) 0.1 to 1% by mass of carboxyvinyl polymer or alkyl-modified carboxyvinyl polymer, and 76 to 98.4% by mass of water, for preventing ultraviolet rays Skin lotion.

( Wherein Z is a methylglycoside residue, n is 3 to 5, PO is an oxypropylene group, EO is an oxyethylene group, BO is an oxybutylene group, and x, y, and m are PO, EO, and BO, respectively. (The average number of moles added, x + y is a value from 1 to 30, m is a value from 1 to 5, and the mass ratio of PO to EO (PO / EO) is 1/5 to 5/1.)

UV protective skin lotion of the present invention, fresh feel when applied directly to the skin, together with the elongation is smooth, after familiar to the skin, sticky feeling, dry feeling, hardly give sense of stagnation, the cosmetic glue It has the effect of being good.

Embodiments of the present invention will be described below. UV protective skin lotion of the present invention, (a) an average particle size 0.1~10μm polysilicone of microcapsules encapsulating an ultraviolet absorbent, a compound represented by formula (b) (I), (c) The carboxyvinyl polymer or alkyl-modified carboxyvinyl polymer and water are each contained in a specific ratio. These components will be described sequentially.
In the following, “ultraviolet prevention skin lotion” is also referred to as “ultraviolet prevention skin cosmetic”.

[(A) Polysilicone microcapsules with an average particle size of 0.1 to 10 μm encapsulating an ultraviolet absorber]
(A) Polysilicone microcapsules having an average particle size of 0.1 to 10 μm encapsulating an ultraviolet absorber used in the skin cosmetic for preventing ultraviolet rays according to the present invention are obtained by microcapsulating a substance having ultraviolet absorptivity with polysilicone. It is a thing.

  Examples of the ultraviolet absorber include 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid sodium, dihydroxydimethoxybenzophenone-sodium sulfonic acid, 2,4-dihydroxybenzophenone, tetrahydroxybenzophenone, paraamino Benzoic acid, ethyl paraaminobenzoate, glyceryl paraaminobenzoate, amyl paradimethylaminobenzoate, octyl paradimethylaminobenzoate, hexyl diethylaminohydroxybenzoylbenzoate, ethyl paramethoxycinnamate, isopropyl paramethoxycinnamate, paramethoxy 2-ethylhexyl cinnamate, sodium paramethoxycinnamate, potassium paramethoxycinnamate, mono-2-ethyl diparamethoxycinnamate Glyceryl xanthate, octyl salicylate, phenyl salicylate, homomenthyl salicylate, dipropylene glycol salicylate, ethylene glycol salicylate, myristyl salicylate, methyl salicylate, urocanic acid, ethyl urocanate, 4-tert-butyl-4'-methoxydibenzoylmethane, 2 -(2′-hydroxy-5′-methylphenyl) benzotriazole, methyl anthranilate, octyl triazone, octocrine and the like, and at least one selected from these is a poly having an average particle size of 0.1 to 10 μm. It can be encapsulated in silicone microcapsules. In particular, it is preferable to use 2-methoxyhexyl paramethoxycinnamate effective for absorbing ultraviolet B waves and 4-tert-butyl-4'-methoxydibenzoylmethane effective for absorbing ultraviolet A waves.

  As the polysilicon which is the wall film of the microcapsule, a silicone resinized polypeptide comprising a polypeptide part obtained by hydrolyzing a silicone part and silk protein is preferably used. Polysilicone microcapsules having an average particle size of 0.1 to 10 μm encapsulating an ultraviolet absorber can be produced by a known method using such a wall film. For example, JP 2001-049233 A (Patent) Reference 4) and Japanese Patent Application Laid-Open No. 2001-106612 (Patent Document 5) can be manufactured.

  The content of the ultraviolet absorber encapsulated in the polysilicon microcapsules having an average particle size of 0.1 to 10 μm is equal to the total mass of the polysilicon microcapsules having an average particle size of 0.1 to 10 μm encapsulating the ultraviolet absorber. On the other hand, 20-93 mass% is preferable and 40-90 mass% is more preferable. (A) “SILASOMA MEA (L)” or “SILASOMA ME” manufactured by Seiwa Kasei Co., Ltd. is used as a commercially available product of a microcapsule of polysilicon having an average particle size of 0.1 to 10 μm encapsulating an ultraviolet absorber. be able to.

  Polysilicone microcapsules having an average particle size of 0.1 to 10 μm encapsulating the component (a) UV absorber is 1 to 13% by mass, preferably 2 to 11% by mass in the UV-preventing skin cosmetic. More preferably, it is contained at a ratio of 3 to 9% by mass. When the amount is less than 1% by mass, the effect of preventing ultraviolet rays may be reduced. When the amount exceeds 13% by mass, the effect on freshness, smoothness of smoothness, stickiness, occlusion, and makeup paste may be reduced. .

[(B) Compound represented by Formula (I)]
The compound represented by the formula (I) used in the skin cosmetic for preventing UV rays of the present invention has an oxypropylene group, an oxyethylene group and an oxybutylene group in a compound having 3 to 5 hydroxyl groups such as glycerin. An alkylene oxide derivative having an added structure.

In formula, Z is a residue except the hydroxyl group of the compound which has 3-5 hydroxyl groups, n is the number of the hydroxyl groups of the compound of Z, and is 3-5. Examples of the compound having 3 to 5 hydroxyl groups include glycerin and trimethylolpropane when a = 3, and methyl glucoside, ethyl glucoside, butyl glucoside, erythritol, pentaerythritol, diglycerin when a = 4. Sorbitan, and if a = 5, xylitol, and mixtures thereof. Preferred are glycerin and methyl glucoside. More preferred is glycerin.
PO represents an oxypropylene group, EO represents an oxyethylene group, and BO represents an oxybutylene group. x, y, and m are average addition moles of PO, EO, and BO, respectively, x + y is a value of 1-30, m is a value of 1-5, and the mass ratio of PO and EO (PO / EO) ) Is 1/5 to 5/1.

  In addition, in order to obtain a high moisturizing effect, it is preferable that PO and EO are added randomly. BO is added to the terminal in a block form, and examples of the compound that gives an oxybutylene group include 1,2-butylene oxide, 2,3-butylene oxide, and tetramethylene oxide (tetrahydrofuran). 1,2-butylene oxide is preferred from the standpoints of ease of handling and reaction control. When these oxyalkylene groups are added, the addition reaction is usually carried out using a phase transfer catalyst, a Lewis acid catalyst, an alkali catalyst or the like. In general, it is preferable to use an alkali catalyst such as potassium hydroxide.

  (B) “WILBride S-753” (manufactured by NOF Corporation, Z in formula (I) is a glycerin residue, x + y is 4.3, m is 1, and the mass of PO and EO. (WI / BRIDGE MG-2070) manufactured by NOF Corporation (Z in the formula (I) is a methyl glycoside residue, x + y is 9.5, m And a mass ratio of PO and EO (PO / EO) is 2/5.) And the like can be used.

(B) a component compound represented by the formula (I), the ultraviolet ray for preventing skin cosmetics 0.5 to 8 wt% in, good Mashiku is included in a proportion of 1 to 7 mass%. When the amount is less than 0.5% by mass, the effect on smoothness, stickiness, dryness, and makeup can be reduced. When the amount exceeds 8 % by mass, the effect on freshness and occlusion is reduced. Sometimes.

[(C) Carboxyvinyl polymer or alkyl-modified carboxyvinyl polymer]
The (c) carboxyvinyl polymer used in the UV-preventing skin cosmetic of the present invention is a water-soluble vinyl polymer mainly composed of acrylic acid, which is crosslinked with an allyl ether of sucrose or an allyl ether of pentaerythritol. In the component (c), the alkyl-modified carboxyvinyl polymer is a copolymer of acrylic acid or methacrylic acid and alkyl acrylate or alkyl methacrylate, for example, acrylic acid and a linear chain having 10 to 30 carbon atoms. A compound obtained by copolymerizing an acrylic ester or methacrylic ester having a linear or branched alkyl group, and an acrylic ester or methacrylic ester having a linear or branched alkyl group having 10 to 30 carbon atoms. It is a compound obtained by copolymerization with an acid ester.

  The aqueous solution containing the component (c) can increase its viscosity by neutralizing with basic amino acids such as sodium hydroxide, potassium hydroxide, triethanolamine, triethylamine, lysine and arginine. In a 0.5% by mass aqueous solution adjusted to pH = 5.5, those having a viscosity of 0.5 to 200 Pa · s are preferably used. In addition, the viscosity of (c) component can be measured according to the viscosity measuring method in the quasi-drug raw material specification 2006 general test method.

  (C) As the carboxyvinyl polymer or the alkyl-modified carboxyvinyl polymer, products that are commercially available as cosmetic raw materials can be used. Specific examples of the carboxyvinyl polymer include “AQUPEC” manufactured by Sumitomo Seika Co., Ltd. HV-505E ”,“ Carbopol 940 ”“ Carbopol 941 ”manufactured by Lubrizol Advanced Materials,“ Sintalen K ”“ Syntalen L ”manufactured by 3V Sigma, etc. “AQUPEC HV-501ER” manufactured by Co., Ltd., “Carbopol 1342” and “Carbopol ETD2020” manufactured by Lubrizol Advanced Materials. 1 type, or 2 or more types can each be used for a carboxy vinyl polymer and an alkyl modified carboxy vinyl polymer, and a carboxy vinyl polymer and an alkyl modified carboxy vinyl polymer can also be used together.

  The component (c) component carboxyvinyl polymer or alkyl-modified carboxyvinyl polymer is 0.1 to 1% by mass, preferably 0.2 to 0.8% by mass, more preferably 0. It is contained at a ratio of 2 to 0.6% by mass. When the amount is less than 0.1% by mass, the effect on freshness, smoothness of smoothness and feeling of blockage may be reduced. When the amount is more than 1% by mass, the effect on stickiness and makeup paste may be reduced. .

The UV cosmetic skin cosmetic of the present invention can take various dosage forms containing water, for example, lotions, emulsions, gels, creams and the like. The content of water in the UV-preventing skin cosmetic varies depending on the dosage form of the UV-preventing skin cosmetic and is usually 50 to 98% by mass. In particular, the content of water in the skin lotion for preventing ultraviolet rays according to the present invention is 76 to 98.4% by mass in the skin lotion for preventing UV rays.

  When preparing the skin cosmetic for preventing ultraviolet rays of the present invention, a method of stirring and mixing water and the above components (a) to (c) is used.

  It is also possible to add an additive commonly used in cosmetics and pharmaceuticals to the UV-preventing skin cosmetic of the present invention as long as the effects of the present invention are not impaired. When applying the skin cosmetic for UV protection of the present invention to the skin, a method of directly applying the cosmetic to the skin, a method of wiping the skin with an absorbent material such as a nonwoven fabric impregnated with the cosmetic, etc. are used. .

  Next, the present invention will be described in more detail with reference to examples and comparative examples. The following “%” means mass%.

[Examples 1-6 and Comparative Examples 1-7]
The components shown in Table 1 were mixed and stirred to prepare a UV cosmetic skin cosmetic and evaluated by the following method. The results are shown in Table 1. Each cosmetic was adjusted to around pH 5.5 with potassium hydroxide.

  Twenty women (25 to 45 years old) were panelists, and the obtained UV-preventive skin cosmetic (about 1 g) was used for 1 week before makeup, and judged according to the following criteria.

(1) Freshness 2 points: When the user feels fresh.
1 point: When the user feels a slightly fresh feeling.
0 points: When the user feels it is not fresh.

The total score of 20 people was calculated and evaluated as follows.
A: Total score of 35 points or more and 0 points: 0: A skin care composition for preventing ultraviolet rays having an excellent fresh feel.
◯: The total score is 25 points or more and less than 35 points, or the total score is 35 points or more and the 0 point is 1 or more and 2 or less: a skin care composition for preventing ultraviolet rays having a fresh feel.
(Triangle | delta): The total score is 15 points or more and less than 25 points: It is the skin cosmetics for ultraviolet rays prevention which has a slightly fresh feeling.
X: The total score is less than 15: It is a skin cosmetic for preventing ultraviolet rays having a poor fresh feel.

(2) Smoothness of spreading 2 points: When the skin feels very smooth.
1 point: When the skin feels slightly smooth.
0 points: When the skin feels not smooth.

The total score of 20 people was calculated and evaluated as follows.
A: The total number of points is 35 or more and 0 is 0. This is an anti-ultraviolet skin cosmetic with excellent smoothness.
A: The total score is 25 points or more and less than 35 points, or the total score is 35 points or more and the 0 point is 1 or more and 2 people or less: It is a skin cosmetic for preventing ultraviolet rays having excellent smoothness of spreading.
(Triangle | delta): Total score is 15 points or more and less than 25 points | pieces: It is skin cosmetics for ultraviolet rays prevention in which the smoothness of spreading was somewhat excellent.
X: Total score is less than 15: It is an anti-ultraviolet skin cosmetic that does not spread smoothly.

(3) Stickiness 2 points: When the skin did not get sticky after getting used to the skin.
1 point: When the skin is almost not sticky after getting used to it.
0 points: When sticky after getting used to the skin.

The total score of 20 people was calculated and evaluated as follows.
A: Total score of 35 points or more and 0 points: 0: A skin cosmetic for preventing ultraviolet rays without stickiness.
A: The total score is 25 points or more and less than 35 points, or the total score is 35 points or more and 0 point is 1 or more and 2 or less people: skin cosmetics for preventing ultraviolet rays having almost no stickiness.
(Triangle | delta): The total score is 15 points or more and less than 25 points | pieces: It is a skin cosmetic for ultraviolet rays with a somewhat sticky feeling.
X: The total score is less than 15: It is a skin cosmetic for preventing ultraviolet rays having a sticky feeling.

(4) Dry feeling 2 points: When there was no dry feeling.
1 point: When there was almost no dry feeling.
0 point: When there was a dry feeling.

The total score of 20 people was calculated and evaluated as follows.
A: Total score of 35 points or more and 0 points: 0: A skin cosmetic for preventing ultraviolet rays having no dryness.
○: The total score is 25 points or more and less than 35 points, or the total score is 35 points or more and the 0 point is 1 or more and 2 or less people: skin cosmetics for preventing ultraviolet rays having almost no dry feeling
(Triangle | delta): The total score is 15 points or more and less than 25 points: It is a skin cosmetic for ultraviolet rays with a somewhat dry feeling.
X: The total score is less than 15 points: A skin cosmetic for preventing UV rays having a dry feeling.

(5) Blocking feeling 2 points: When there is no blocking feeling.
1 point: When there is almost no blockage.
0 point: When there is a feeling of obstruction.

The total score of 20 people was calculated and evaluated as follows.
A: The total score is 35 points or more and 0 points is 0: a skin cosmetic for preventing ultraviolet rays that does not have a feeling of blockage.
◯: The total score is 25 points or more and less than 35 points, or the total score is 35 points or more and 0 point is 1 or more and 2 people or less: It is a skin cosmetic for preventing ultraviolet rays with almost no occlusion.
(Triangle | delta): The total score is 15 points or more and less than 25 points: It is a skin cosmetic for ultraviolet rays with a somewhat obstructive feeling.
X: The total score is less than 15: a skin cosmetic for preventing ultraviolet rays having a feeling of blockage.

(6) Makeup No. 2 points: When the makeup feels good.
1 point: When the feeling of makeup is slightly good.
0 points: When the makeup feels bad.

The total score of 20 people was calculated and evaluated as follows.
A: Total score of 35 points or more and 0 points: 0: Skin cosmetic for UV protection with very good makeup.
A: The total score is 25 points or more and less than 35 points, or the total score is 35 points or more and 0 point is 1 or more and 2 or less: a skin cosmetic for preventing UV rays with good makeup.
(Triangle | delta): Total score is 15 points or more and less than 25 points | pieces: It is a skin cosmetic for ultraviolet rays prevention with a slightly bad makeup.
X: The total score is less than 15: It is a skin cosmetic for preventing UV rays with poor makeup.

* 1 "SILASOMA MEA (L)" (manufactured by Seiwa Kasei Co., Ltd.)
Polysilicone microcapsules encapsulating 2-methoxyhexyl paramethoxycinnamate and 4-tert-butyl-4′-methoxydibenzoylmethane (average particle size: about 2 μm, content of UV absorber 90%) 60% aqueous dispersion.
* 2 “SILASOMA ME” (manufactured by Seiwa Kasei Co., Ltd.)
A 60% aqueous dispersion of polysilicon microcapsules (average particle size: about 2 μm, UV absorber content 90%) encapsulating 2-methoxyhexyl paramethoxycinnamate.
* 3 "WILBride S-753" (manufactured by NOF Corporation)
In the formula (I), Z is a glycerin residue, x + y is 4.3, m is 1, and the mass ratio of PO and EO (PO / EO) is 4/5.
* 4 "WILBRIDE MG-2070" (manufactured by NOF Corporation)
In the formula (I), Z is a methyl glycoside residue, x + y is 9.5, m is 1, and the mass ratio of PO and EO (PO / EO) is 2/5.
* 5 “AQUPEC HV-505E” (manufactured by Sumitomo Seika Co., Ltd.)
Carboxyvinyl polymer (0.5% aqueous solution (pH = 5.5) viscosity 140 Pa · s)
* 6 "AQUPEC HV-501ER" (manufactured by Sumitomo Seika Co., Ltd.)
Alkyl-modified carboxyvinyl polymer (0.5% aqueous solution (pH = 5.5) viscosity 190 Pa · s)
* 7 “Unilube 50TG-32” (manufactured by NOF Corporation)
Polyoxyethylene polyoxypropylene glyceryl ether (24E.O.) (24P.O.)

  According to the skin cosmetics for preventing ultraviolet rays of the present invention (Examples 1 to 6), the touch when applied directly to the skin is fresh, the smoothness is smooth and the skin feels sticky, dry, It was difficult to give a feeling of occlusion and was excellent in makeup.

On the other hand, in Comparative Examples 1-8, sufficient performance is not obtained.
In Comparative Example 1, instead of the component (a), an unencapsulated ultraviolet absorber (paramethoxycinnamic acid-2-ethylhexyl) is included, so that it is refreshing, smooth, sticky, Sufficient performance was not obtained in the makeup glue.
In Comparative Example 2, since the blending amount of the component (a) exceeded the upper limit of the range specified in the present invention, sufficient performance was not obtained in freshness, smoothness of smoothness, occlusion, and makeup.
In Comparative Example 3, since component (b) was not included, sufficient performance was not obtained in the smoothness of smoothness, stickiness, dryness, and makeup.
In Comparative Example 4, since an alkylene oxide derivative other than the component (b) was included instead of the component (b), sufficient performance was not obtained in terms of smoothness, stickiness, and makeup.
In Comparative Example 5, since the blending amount of the component (b) exceeded the upper limit of the range specified in the present invention, sufficient performance was not obtained in freshness and feeling of occlusion.
In Comparative Example 6, since the component (c) was not included, sufficient performance was not obtained in freshness, smoothness of extension, and feeling of occlusion.
In Comparative Example 7, since a water-soluble polymer (xanthan gum) other than the component (c) was included instead of the component (c), sufficient performance was not obtained in freshness, stickiness, and occlusion. .
In Comparative Example 8, since the blending amount of the component (c) exceeded the upper limit of the range specified in the present invention, sufficient performance was not obtained in the sticky feeling and the makeup paste.

  The UV-preventing skin cosmetic composition of the present invention has a fresh feel when applied directly to the skin, has a smooth spread, and does not give a sticky feeling, a dry feeling, or a clogging feeling after being applied to the skin. Since it is good, it can be suitably used as a skin cosmetic for preventing ultraviolet rays such as lotion, milky lotion, gel and cream.

Claims (1)

(A) 1 to 13% by mass of a microcapsule of an average particle size of 0.1 to 10 μm encapsulating an ultraviolet absorber, (b) 0.5 to 8% by mass of a compound represented by the formula (I), (c ) Skin lotion for preventing ultraviolet rays, containing 0.1 to 1% by mass of carboxyvinyl polymer or alkyl-modified carboxyvinyl polymer and 76 to 98.4% by mass of water.

( Wherein Z is a methylglycoside residue, n is 3 to 5, PO is an oxypropylene group, EO is an oxyethylene group, BO is an oxybutylene group, and x, y, and m are PO, EO, and BO, respectively. (The average number of moles added, x + y is a value from 1 to 30, m is a value from 1 to 5, and the mass ratio of PO to EO (PO / EO) is 1/5 to 5/1.)