JPS5962517A - Anti-suntan cosmetic - Google Patents

Abstract

PURPOSE:To provide the titled cosmetic having excellent applicability, finished state, water-resistance, etc. and shielding ultraviolet radiation of wide wavelength range, by using ultrafine particles having specific diameter, and an ultraviolet absorber absorbing the ultraviolet radiation of UV-A range. CONSTITUTION:The objective anti-suntan cosmetic contains (A) 1-15wt% of ultrafine powder (preferably titanium oxide powder or iron oxide powder) having maximum particle diameter of <=0.1mu and an average particle diameter of 10- 40mmu and capable of absorbing or scattering the ultraviolet radiation of UV-B range, i.e. corresponding to the wavelength of 290-320nm and (B) 0.5-5wt% of an ultraviolet absorber absorbing the ultraviolet radiation of UV-A range, i.e. corresponding to the wavelength of 320-400nm, e.g. 4-(1,1-dimethylethyl)-4'- methoxybenzoylmethane.

Description

[Detailed description of the invention] The present invention relates to improved sunscreen cosmetics.

In addition, IIY, Shi< is an ultra-fine powder that is easy to use and has an excellent ability to broadly absorb and scatter ultraviolet rays from sunlight, and UV- The present invention relates to an anti-burning cosmetic containing a UV absorber having absorption in the A region.

Conventional anti-scorch cosmetics contain ultraviolet absorbers or ultraviolet scattering agents that absorb or scatter ultraviolet rays in the tJV-B region of 290 to 32,011 m, which are harmful to the skin, and are caused by ultraviolet rays in this region. Erythema, blisters, floaters 1
Methods to prevent 1Φ etc. were commonly used. However, the ultraviolet rays in the sun's rays UV-B j gradually UV-Al
1 is about 110, and UV-A accounts for a large proportion.

In addition, UV-B is mostly diffused and absorbed at the level of the epidermis, whereas it has been reported that 35-50% of UV-A reaches the upper dermis, leading to erythema. It is said that UV-B is the cause of primary tanning, aggravates skin disorders caused by UV-B, and that chronic exposure is a cause of skin cancer and skin aging. (It is also necessary to prevent UV-A.

However, there are currently many UV absorbers that absorb in the U■-B region, and there are no UV absorbers that have strong absorption in the UV-A region and are highly safe and stable. There wasn't. Therefore, in order to widely prevent ultraviolet rays up to the UV-A range, there was no other way than to add a large amount of powder that has the property of scattering ultraviolet rays in this range, but this made it difficult to spread when used. However, there were drawbacks such as a whitish finish, which made it difficult to use as a sunscreen cosmetic.

In view of these circumstances, the inventors of the present invention have conducted intensive research to solve the above-mentioned drawbacks, and have developed a powder that scatters ultraviolet rays in the UV-B region and an ultraviolet absorber that is effective in absorbing ultraviolet rays in the UV-A region. By using a combination of
1" which only scatters and absorbs UV-B up to now, without changing the usability of anti-inflammatory cosmetics.
It was discovered that ultraviolet rays in a wide range of nanometers can be prevented, and the present invention was completed based on this knowledge.

That is, the present invention uses ultrafine particulate powder with an average particle diameter of 10 to 40 mμ to prevent sunburn containing 0.5 to 5% by weight of an ultraviolet absorber having a strong absorption range of 1 to 15% by weight V-A. It provides cosmetics.

It is preferable to use a material with a diameter of about 40 mμ and a large refractive index, such as titanium oxide or iron oxide. Particularly preferred is ℃ titanium oxide. The amount of ultrafine powder to be blended is selected within the range of 1 to 15 percent. If it is less than 1% by weight, the ultraviolet scattering effect will not be sufficient, and if it exceeds 15% by weight, it will be undesirable because it will lead to poor usability and a whitish appearance.

The ultraviolet absorber used in the present invention preferably has strong absorption in the UV-A region, such as 4-(1·1 dimethylethyl) a/-methoxydibenzoylmethane or 2-
Hydroxy-4-methoxybenzofuronene and the like are preferred. The amount of UV absorber added is 0.5~
Selected within a range of 5%.

(Hereinafter in the margin) In addition to the above-mentioned essential ingredients, the cosmetic of the present invention may contain an oily component, a humectant, a surfactant, a pigment, a fragrance, a preservative, etc., as necessary.

The ET sunscreen cosmetic of the present invention is a sunscreen cosmetic with excellent UV protection effects, and has excellent usability, finished condition,
It has the properties required for a sunscreen cosmetic, such as water resistance.

Next, the present invention will be explained in more detail with reference to Examples. The present invention is not limited thereby. The blending amount is in weight%.

Example 1 Sunscreen emulsion (wt%) (A) Purified water
62.5 polyethylene glycol
50 montmorillonite
05 Dispersant, chelating agent
Appropriate amount of alkaline (B) stearic acid
2 cetyl alcohol
1 Vaseline
5 olive oil
10 liquid paraffin
2 Glyceryl monostearate 1.5 Polyoxyethylene (20 mol) monooleate 1.54
-(1,1 dimethylethyl) -a/-methoxydibenzoylmethane 2 Fragrance Appropriate amount Preservative Discoloration Appropriate amount <Production method> After heating and dissolving phase A, add phase A' and uniformly disperse with a homomixer. Add phase B heated and dissolved therein, stir well, and use a homomixer to homogenize (wt%) (A) Purified water
. 4.5 polyethylene glycol
5 Montmori p night
0.5 Dispersant, chelating agent
Appropriate amount Arno Jsu (B) stearic acid
2 cedil alcohol
1 Vaseline
5 olive oil
10 liquid paraffin
2 Glyceryl monostearate 5 Polyoxyethylene (20 mol) monooleate
L5 fragrance Applicable preservative color 4'A Appropriate amount <Manufacturing method> According to Example 1 ◇ Ratio example 2 (% by weight) (A) Purified water
56.5 polyethylene glycol
5 Montmorillonite
0.5 Dispersant, chelating agent
Appropriate amount (B) Stearic acid
2 cetyl alcohol
1 Vaseline
5 olive oil
10 liquid paraffin
2 Glyceryl monostearate 15 Polyoxyethylene (20 mol) monooleate
1.5 Fortune Telling Appropriate amount Preservative Coloring material Appropriate +, , j3〈
Manufacturing method> According to Example 1.

Comparative Example 3 Sunscreen emulsion (wt%) (A) Purified water
66.0 polyethylene glycol
5 Montmorillonite
. , 5 dispersant, chelating agent
Suitable ii1 Alkali (B) stearic acid
2 cetyl alcohol
1 Vaseline
5 olive oil
1゜Liquid paraffin
2 Glycerin monostearate
15 polyoxyethylene (20 mol) monooleate
154-(1,1 dimethylethyl) -a/-methoxydibenzoylmethane
5 Flavoring agent Appropriate amount Preservative Coloring agent Appropriate amount <Production method according to Example 1.

Example 2 Sunscreen cream (weight 173%) (A) Purified water
41.0 polyethylene glycol
5 Dispersant Appropriate amount (E) Cetyl alcohol
5 Vaseline
10 olive oil
, 5 liquid paraffin
5. Microcrystalline wax
5 Glyceryl Monostearate
2 polyoxyethylene (20 mol) sorbitan monostearate 24-(1,1 dimethylethyl) -47-methoxydibenzoylmethane
5.Fragrance, appropriate amount, preservative, coloring material, appropriate amount.Production method: After heating and dissolving the human phase, add phase A' and uniformly disperse with a homomixer. A heated solution of phase B (1γr2) was added thereto, thoroughly dispersed with a homogenizer, and stirred and cooled.

Comparative Example 4 [-1 Burnt Fl-Me Cream (Nail IL 1%) Il'? ice making
460 polyethylene glycol
5 Dispersant suitable
1i(B) Cetyl alcohol
5 Vaseline
10 leaves oil
15 Liquid paraffin
5 Microcrystalline wax
5 Glyceryl Monostearate
2bo 1 month Ethylene (20 mol) Sorbitan monostearate 2 incense o'I
Appropriate amount Preservative Color Appropriate amount <Manufacturing method> According to Example 2.

(Margin below) Effect test Mormo's UV-A and UV-B prevention effects.

The 3° Uv-AII) J city effect tested using 1424 (], 1ii7 animals) was 111''5 (q) Sunlight and Man (Sunlight and Man).
), page 591 1 Tojin Publishing ＼ 1974 2 method, synopsis 8-Me I Kinsoraren 8111!
7/kg 1" cast, molmo sensitive to UV-A, 1
-Using a Toshiba FL-4CIBLB lamp (human m2L x 360nm) as a light source, the U of Examples 1 and 2 was created.
The VA prevention effect was compared between the uncoated case and the case of Comparative Example 1.2.3.

In addition, the UV-E prevention effect was confirmed by Fukuyama Tokku Journal, Karibu, So → Noeti of Fusumechi, Ri, Chemise Example 1
and 2 were compared with the uncoated case and the case of Comparative Example 1.3.4.

All are shown in the number of animals that developed erythema at each irradiation time.

The results are shown in Table 1 (UV-B prevention effect) and Table 2 (UV-B prevention effect).
-A), Examples 1 and 2 were uncoated, and Comparative Examples 1.2. ．． Compared to 3.4, UV-A
It was confirmed that it completely prevented both UV and UV-B, and had an extremely excellent effect as an anti-burning cosmetic.

On the other hand, in Comparative Examples 1 and 4, the UV-E protective effect was slightly observed, but the UV-A protective effect was very weak, and Comparative Example 2
No UV-A prevention effect was observed, and Comparative Example 3 had almost no UV-B prevention effect.
The UV protection effect as 4'l is insufficient, s,
? , = ° (below the margin) Next is the product Wa 11! The effectiveness was tested in actual use.

In the actual use test, 15 women from Ta to Hadashiro were used as subjects.
Example 1 and Comparative Examples 1 and 2.3 were tested and summer'/f1
Yotj (I did it.

The numbers in Table 3 are good for each of the 5 people (il: 4).
This is the number of people who answered "i added".

As is clear from the actual use test results in Table 3, Example 1
El-burning had a very good preventive effect, and it was also excellent in usability as an anti-burning cosmetic and in terms of finish and shine.

Comparative Example 1 [゛The sunburn prevention effect was worse than Example 1, and Comparative Example 2 had the same sunburn prevention effect as Example 1, but it did not spread on the skin or cause stains, etc. The coating color was poor, and the coating color was noticeable due to powder such as titanium dioxide, and the finish was poor and undesirable.

Comparative Example 3 had good usability, but the El'6 tL effect was insufficient.

1 (burning is commercialized'I)I Fl according to the present invention has a simple effect of preventing burns, and is very excellent in usability, finish, etc. As a cosmetic, it has a wide range of functionality to prevent UV rays, and is easy to use.
Good performance] It is 71/Ii i to be in a happy state.
J was made.

Patent applicant: Shiseido Co., Ltd.

Claims (1)

[Claims] The maximum particle size is 01 μ or less and the average particle size is 10 to 411) m.
μ ultrafine powder and 320~400 μ/meter U
V-1" anti-burning 8J-sting containing an ultraviolet absorber that absorbs ultraviolet rays in the A region.