JPH0676307B2 - Sunscreen cosmetics - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improved sunscreen cosmetic, and more specifically, fine particles of metatitanic acid (hereinafter abbreviated as HTO) are uniformly stabilized by a specific clay mineral. By containing a specific aqueous sol dispersed in, it transmits visible light and absorbs harmful UV rays that cause sunburn to prevent blackening of the skin (sunburn), good day-to-day stability and skin safety The present invention relates to an excellent sunscreen cosmetic which, when applied and used, gives a good feel to the skin, spreads well, adheres smoothly and has a smooth finish (no powderiness), and does not exhibit whitening or pale coloration.

(Prior Art) Sunburn is caused by medium-ultraviolet rays (hereinafter abbreviated as UV-B) having a wavelength of 290 to 320 nm and near-ultraviolet rays (hereinafter, UV-A) having a wavelength of 320 to 400 nm in sun rays. UV-B causes erythema on the skin and causes blackening after inflammation. On the other hand, UV-A
Is much weaker in erythema-inducing force than UV-B, and is said to blacken the skin substantially without causing erythema. Thus, the mid-ultraviolet rays of 290 to 320 nm are said to have the strongest biological effects. Of these, 297.6 nm is the strongest wavelength.

Conventionally, in order to prevent these disorders, cosmetics containing various ultraviolet absorbers have been developed and marketed,
Examples of the ultraviolet absorbers used in these include synthetic ultraviolet absorbers such as P-aminobenzoic acid derivatives, salicylic acid derivatives, benzophenone derivatives, and cinnamic acid derivatives, and inorganic pigments such as titanium oxide, zinc oxide, and iron oxide. To be

The former synthetic ultraviolet absorber has a problem of solubility when the amount added to the cosmetic base material is increased, and also causes irritation to the skin,
There are many problems as a raw material for cosmetics, such as deterioration due to ultraviolet absorption, deterioration of absorption, coloring and the like.

On the other hand, the latter inorganic pigments have little deterioration due to ultraviolet rays, and since they are not percutaneously absorbed, there is no problem with skin irritation, but those with large particles (for example 350 mμ) have weak ultraviolet absorption and strong hiding power. Too much, whitening or coloring, when applied to the skin, it remains white or becomes thick makeup, giving an unnatural finish and is not desirable for makeup.

Further, JP-B-47-42502 discloses that the average particle size is 30 to 40 m.
A sunscreen cosmetic containing μ titanium oxide has also been proposed, but it has high hiding power, remains white during application, is inconvenient for the cosmetic appearance, and has dispersibility in a cosmetic base material, usability, and stability. Sex is not preferable.

Further, JP-A-61-229809 proposes a cosmetic containing amorphous titanium oxide, which is also white at the time of application and has no effect on blackening prevention, adhesion to the skin, etc. Is enough.

Further, Japanese Patent Application Laid-Open No. 58-62106 proposes a cosmetic containing 10 to 30 μm of ultrafine hydrophobized titanium oxide, which is also whitened during application and has a powdery appearance. ,
It does not spread well or adheres well to the skin, and its blackening prevention effect is not satisfactory.

(Problems to be Solved by the Invention) The inventors of the present invention have conducted diligent research in order to solve the above-mentioned problems in view of such circumstances, and as a result, an aqueous sol of HTO having the structure described below is
HT by a specific clay mineral that coexists as a stabilizer
O fine particles are uniformly and stably dispersed, do not cause secondary particle formation or aggregation even after long-term storage, absorb harmful ultraviolet rays that cause sunburn, and prevent skin blackening, and The cosmetic containing the aqueous sol has an appearance, stability over time,
Good skin safety, no stickiness when applied,
The present invention has been completed by finding that it gives a good feel to the skin, adheres well with good stretch and is smoothly finished, and does not exhibit whitening (without powder) or pale coloration.

(Means for Solving Problems) That is, in the present invention, at least one of clay minerals is dissolved as a stabilizer in water, and as a result, an aqueous sol in which fine particles of HTO are uniformly and stably dispersed is a main component. It is a sunscreen cosmetic.

In the HTO sol of the present invention, at least one clay mineral is uniformly dissolved in water as a stabilizer,
It is an aqueous sol in which secondary aggregation is prevented in advance and the particles are uniformly dispersed, and it has a semitransparent to slightly white appearance and is excellent in long-term storage stability. The HTO sol, which contains HTO fine particles, can transmit visible light and absorb harmful ultraviolet rays that cause sunburn to prevent skin darkening (sunburn).

The HTO sol has a pH of usually 4 to 9 and may contain a small amount of anatase type or rutile type titanium oxide particles.

The HTO sol used in the present invention is obtained by adding a required amount of clay mineral to a commercially available hydrochloric acid acidic solution of HTO and dispersing it with stirring.
After swelling, this mixed aqueous solution is neutralized with a caustic soda aqueous solution under water cooling, and then obtained by dialyzing in running water, or after adding titanium tetrachloride to cold water to hydrolyze, a required amount of It is obtained by dissolving a clay mineral, then neutralizing the mixed aqueous solution with a caustic soda aqueous solution under water cooling, and then dialyzing the mixture in running water.

The sunscreen cosmetic of the present invention has an average particle size of 0.005 to 0.1 μm, based on the total amount (total amount of the final composition).
(Preferably 0.005 to 0.05 μm) HTO (H ₂ TiO ₃ ) as titanium oxide (TiO ₂ ) 1 to 20% by weight, preferably 3 to 15%
It is blended by weight%.

The clay mineral applied to the present invention is a known substance,
Examples include allophane, kaolin minerals, serpentine minerals, montmorillonite minerals, vermiculite, mica minerals, chlorite minerals, but among them, montmorillonite minerals are preferable, for example, montmorillonite, beidellite, nontronite, laponite, hectorite, synthetic hectorite. Clay minerals such as synthetic bentonite, bentonite containing these clay minerals as main components, and acid clay.

The blending amount is 0.05 to 1 based on the total amount of the cosmetic.
It is 0.0% by weight (preferably 0.1 to 5.0% by weight).

Particles having an average particle diameter of HTO smaller than 0.005 μm are difficult to obtain industrially, and when it is larger than 0.1 μm, the cosmetic tends to be whitened during application and the cosmetic effect tends to deteriorate.

When the content of HTO is less than 1% by weight, the sunburn preventing effect and the adhesion to the skin are likely to decrease, and when it is more than 20% by weight, HTO tends to be secondary particles.

Further, if the amount of the clay mineral is less than 0.05% by weight, the feel, storage stability and adhesiveness are likely to deteriorate, and if it is more than 10% by weight, the feel is apt to deteriorate.

In the sunscreen cosmetic of the present invention, in addition to the above essential components,
Fragrances, colorants, preservatives, surfactants, humectants, sequestering agents, water-soluble polymers, pH regulators, oily components and the like can be appropriately blended within a range that can achieve the object of the present invention. .

The sunscreen cosmetics of the present invention include sun oil, suntan lotion, sunscreen, stick-shaped sunscreen, sunscreen lip balm, sancalamine, sun gely, sunscreen cream, sunscreen lotion,
Widely used as sunscreen water white powder, foundation lotion, makeup base, hairnic, hair liquid, etc.

(Examples) The present invention will be described in detail below with reference to examples and comparative examples.

In the examples,% means% by weight, and parts means parts by weight. The methods of the blackening prevention test, storage stability test and practical property test are as follows.

(1) Blackening prevention test (sunburn prevention test) Animal test A group of 10 black guinea pigs is shaved on the back and tested. The test sites are 3 on each side, 4 cm ² each.

The test method is as follows: 0.1% of 8-
Orally administer 1 ml of methoxypsoralen, and after 30 minutes, apply 8 mg of each sample to the right test site only, 320-420 nm
UV-A light of 15 Joules is irradiated. The portion to which the sample was applied was judged one week later and evaluated according to the following criteria.

Evaluation Criteria Evaluation ・ The sample application part is the same as the part not irradiated with ultraviolet rays. (It does not blacken at all) …… ○ ・ The sample application part was slightly discolored.

(Slightly blackened) ・ ・ ・ △ ・ The sample application part changed color considerably.

(Blackened) ... × Human body test (practical test) Test using the backs of 10 test subjects. The test method is to cover the left side of the back with a thick cloth and apply 2 mg / cm of each sample to the right side,
I lie face down for 90 minutes in the hot summer sun. The judgment of the sample application part was carried out after 1 week, and the judgment was made according to the following criteria.

Evaluation criteria Evaluation ・ Same as the skin color on the left.

(No blackening at all) …… ○ ・ It became a little black. …… Δ ・ It became black. …… × (2) Storage stability test After the sample (sunscreen cosmetic) was stored in a constant temperature bath at 45 ° C for 3 months, the presence or absence of separation and precipitation was examined and evaluated.

(3) Practical characteristics test (sensory test) Twenty female subjects tried the sample (sunscreen cosmetics) for one week, and in the questionnaire, A1: "Smooth finish, no powderiness", A2: "Skin" Adheres well to each other ", A3:" There is no whitening or pale coloration on the applied part, it does not change to a natural skin color ", A4:" No skin irritation ", A5:" Good spread during application ", A6: The number of respondents answered that "there was no sticky feeling and gave the skin a moist feel."

Example 1 (1) Production of HTO sol 3 parts of montmorillonite was added to a commercially available HTO hydrochloric acid acidic aqueous solution (30% as titanium oxide) and uniformly dissolved, and then this mixture (aqueous solution) was put into a cellophane tube and heated to 5 to 15 ° C. Keep it dialyzed in running water for 48 hours. After that, the contents of the cellophane tube were transferred to a container, purified water was added to make the total amount 200 parts, and HTO containing 15% as titanium oxide (HTO sol (HT
The average particle size of O was 0.03 to 0.05 μm, the montmorillonite content was 1.5%, and the water content was 83.5%.

(2) Absorption spectra of HTO sol in the visible and ultraviolet regions (a) Sample: Sample A: HTO sol obtained in (1) above B: Ultrafine particle titanium oxide (average particle size 0.03 to 0.05μ)
m) 15% water dispersion 〃 C: Titanium oxide (average particle size 0.35 μm) (anatase type) 15% water dispersion (b) Measurement method: Spectrophotograph using a quartz cell measuring 0.1 mm Absorbance in a wavelength range of 200 to 700 nm was measured with a meter. The results are shown in FIG.

(C) Measurement results As is clear from FIG. 1, in the curve C of ordinary titanium oxide having a relatively large particle size, the absorption effect in the ultraviolet region is small and the absorbance in the visible region is high (transparency is poor). In the curve B of the ultrafine titanium oxide, the absorption effect in the ultraviolet region can be seen and the absorbance of visible light is good (the transmittance is good). In contrast to these curves, the curve A of the HTO sol of the present invention has the highest ultraviolet absorption effect in all the samples, and the specificity is recognized in that the visible light absorbance is low (the transmittance is very high).

(3) Lotion-type sunscreen cosmetic comprising the diluted solution of HTO sol in (1) The HTO sol obtained in (1) is diluted with purified water so that the concentration of HTO is 5% as titanium oxide. The sunscreen cosmetic (lotion type) of the present invention was obtained. This was subjected to various tests as described above.

The results are shown in Table 1.

Example 2 Sunblock Lotion An HTO sol containing 15% of HTO as titanium oxide (average particle diameter of HTO is the same as in (1) of Example 1) except that synthetic bentonite was used instead of montmorillonite. 0.03 to 0.05 μm, synthetic bentonite content 1.8%, water content 83.2%), and then diluted with purified water in the same manner as in Example 1 (3) to obtain the lotion-type sunscreen cosmetic of the present invention. Got This was subjected to various tests as described above. The results are shown in Table 1.

Example 3 Sunscreen Lotion Other than using kaolin instead of montmorillonite,
HTO sol containing 15% of HTO as titanium oxide (the average particle size of HTO is 0.03 to 0.
05 μm, kaolin content, 2.0%, water content 83.0%), and then diluted with purified water in the same manner as (3) of Example 1,
The lotion type sunscreen cosmetic of the present invention was obtained. This was subjected to various tests as described above. The results are shown in Table 1.

Example 4 (1) Production of HTO sol 20 parts of titanium tetrachloride was added to 80 parts of purified water under ice cooling, and the uniformly dissolved aqueous solution was heated under reflux at 100 ° C. for 5 hours. After cooling this, 10 parts of montmorillonite was added to this solution to dissolve it, and then a caustic soda aqueous solution was added to the solution while stirring under ice cooling to neutralize to pH 7.0. The obtained mixture is transferred to a cellophane tube and dialyzed in running water for 48 hours while maintaining at 5 to 15 ° C. After dialysis, transfer the contents of the cellophane tube to a glass container, add purified water to make the total amount 200 parts, and HTO sol containing 10% of HTO as titanium oxide (the average particle size of HTO is
0.03 to 0.05 μm, montmorillonite content 5%, water content 85%) were obtained.

(2) Lotion-type sunscreen cosmetic comprising the diluted solution of the HTO sol obtained in (1) Purified water containing the HTO sol obtained in (1) above so that the HTO concentration is 5% as titanium oxide. To obtain the sunscreen cosmetic (lotion type) of the present invention. This was subjected to various tests as described above. The results are shown in Table 1.

As shown in Table 1, in Examples 1 to 4, the blackening prevention effect (sunburn prevention effect) was good (good) and the storage stability was good, and no change was observed.

In addition, in a practical characteristic test (sensory test), Example 1,
All of 2 and 4 were excellent, but Example 3 using kaolin was slightly inferior in powderiness, adhesion to skin, and stickiness.

Example 5 [Sunscreen cream] The sunscreen cream of the present invention having the composition shown in Table 2 was prepared, the above-mentioned various tests were carried out, and the characteristics are shown in Table 3.

[Preparation method]

Liquid paraffin, white petrolatum, polyoxyethylene (20E.O.) sorbitan monooleate, and sorbitan sesquioleate are mixed, heated to 70 ° C., and uniformly dissolved (oil phase component).

HTO sol obtained in (1) of Example 1 (average particle size of HTO
0.03-0.05μm, HTO content is 15 as titanium oxide
%, Montmorillonite content 1.5%, water content 83.5
%), Paraben and water are mixed and heated to 70 ° C to uniformly dissolve (aqueous phase component).

Next, the water phase component was added to the above oil phase component with stirring, mixed and emulsified, and then cooled to room temperature to obtain an emulsified (oil-in-water type) sunscreen cream of the present invention.

Comparative Examples 1 to 4 [Sunscreen cream] The sunscreen cream of the present invention having the composition shown in Table 2 was prepared, the above-mentioned tests were carried out, and the results are shown in Table 3.

[Preparation method]

Comparative Example 1 Instead of HTO sol, 3 parts of ordinary titanium oxide having an average particle size of 0.3 to 0.5 μm was used, and 80.9 parts of purified water was used. I got a sunblock for me.

(Comparative Example 2) The same procedure as in Example 5 was carried out except that 3 parts of ultrafine titanium oxide (average particle size: 0.3 to 0.05 μm) was used instead of HTO sol, and 80.9 parts of purified water was used. A sunscreen cream for comparison was obtained.

Comparative Example 3 Instead of the HTO sol, amorphous spherical titanium oxide described in JP-A-61-229809 (average particle size 0.05 to 0.08) was used.
μm) and 80.9 parts of purified water were used, and the same procedure as in Example 5 was carried out to obtain a sunscreen cream for comparison.

Comparative Example 4 Comparative Example 4 was carried out in the same manner as in Example 5 except that ethyl paradimethylaminobenzoate (ultraviolet absorber) was used as an oil phase component instead of the HTO sol and 80.9 parts of purified water was used. Got sunscreen cream.

As is clear from the comparison between Example 5 and Comparative Examples 1 to 3 shown in Table 3, a sunscreen cream using titanium oxide having a normal particle size, ultrafine particle titanium oxide, or amorphous titanium oxide in place of the HTO sol. Then, in the blackening prevention test
It was inferior to the one using HTO sol. That is, it is clear that the sunscreen creams of Comparative Examples 1 to 3 do not have a sufficient sunscreen effect and are excellent in the sunscreen cream containing the HTO sol of the present invention.

Furthermore, the sunscreen cream of the present invention was also clearly superior to Comparative Examples 1 to 3 in the storage stability and practical property tests.

Comparing the results of various tests of Example 5 and Comparative Example 4, both the blackening prevention effect and the storage stability were excellent.

However, of the practical property tests, the item of skin irritation was obviously superior to Example 1.

Example 6 60 parts of liquid paraffin and the HT obtained in (4) of Example 4
Diluted solution of O sol (average particle size of HTO sol is 0.03 ~ 0.05μ
m, HTO content of 10% as titanium oxide, montmorillonite content of 5%) was mixed with 40 parts to prepare a two-layer sun oil (for sun protection) of the present invention. Next, various tests of this two-layer type sun oil were conducted as described above. As a result, the effect of preventing blackening in the animal and human body tests was good (good), the storage stability was good, and no change was observed. In the sensory test, the results by 20 panelists showed that the number of people in A1 was 19 out of 20, the number of people in A2 was 18 out of 20,
The number of people in A3 was 20 out of 20, the number of people in A4 was 20 out of 20, the number of people in A5 was 18 out of 20, and the number of people in A6 was 19 out of 20.

Comparative Example 5 Instead of the HTO sol, the same procedure as in Example 6 was carried out except that 4 parts of ultrafine titanium oxide (average particle size: 0.03 to 0.05 μm) and 36 parts of purified water were used, and a two-layer type for comparison was used. Got sun oil. As a result of various tests of this two-layer type sun oil, the effect of preventing blackness of the animal or human body was good (good) and the storage stability was poor, and titanium oxide was aggregated and precipitated. In the sensory test, 20 panelists showed that the number of A1 was 3 out of 20, the number of A2 was 7 out of 20, and the number of A3 was 1 out of 20.
20 people out of 20 people in A4, 12 people out of 20 people in A5, A6
The number of people was 10 out of 20, and the overall evaluation was rather poor.

Example 7 An aqueous solution in which 0.3 parts of xanthan gum was dissolved in 52.5 parts of purified water, 7 parts of ethyl alcohol, 10 parts of glycerin, and HTO sol (average particle size of HTO was 0.03 to 0.05 μm, HTO was 10% as titanium oxide, synthesized. 80 parts of the HTO sol diluted solution of (1) of Example 1 consisting of bentonite content of 1.0% and water content of 89.0% and 0.2 parts of methylparaben were uniformly mixed,
A sunscreen lotion of the invention was obtained.

The various tests of this sunscreen lotion were carried out. As a result, the effect of preventing blackening in the animal and human body tests was good (good) and the storage stability was good, and no change was observed. The overall evaluation in the sensory test was also very good.

Comparative Example 6 Instead of HTO sol, ultrafine titanium oxide (average particle size
0.03 to 0.05 μm) 3 parts and 79.5 parts of purified water are used,
A sunscreen lotion for comparison was prepared in the same manner as in Example 7. The sunscreen lotion had an effect of preventing blackening in animal and human body tests which was Δ (slightly poor) and showed poor storage stability, and titanium oxide particles were aggregated and precipitated. In the sensory test, 20 panelists showed that the number of people in A1 was 10 out of 20, the number of A2 was 10 out of 20, and the number of A3 was 20.
The overall evaluation was poor, with 7 out of 20 and 20 out of 20 A4.

Example 8 Mix 10 parts myristin octyldodecyl oxide, 2 parts cetyl palmitate, 2 parts glyceryl monostearate, 2 parts polyoxyethylene cetyl ether (5E.O) and polyoxyethylene sorbitan monooleyl ether (6E.O). Then, it is heated to 80 ℃ and melted (oil phase).

HTO sol (average particle size of HTO 0.03 ~ 0.05μm, HTO content is 10% as titanium oxide, laponite content 6.0%,
40 parts of water content 84.0%), 0.2 parts of methylparaben, 5 parts of propylene glycol and 36.8 parts of purified water are uniformly mixed and heated to 80 ° C. (aqueous phase).

To the above oil phase, with stirring, an aqueous phase was added, mixed and emulsified,
After cooling, an emulsion type (oil-in-water type) sunscreen lip balm of the present invention was obtained. As a result of conducting various tests as described above,
The storage stability was good and no change was observed. The results of the sensory test showed that the number of people in A1 was 20 out of 20, the number of people in A2 was 19 out of 20, the number of A3 was 20 out of 20, and the number of A4 was 20.
20 out of 20, 19 out of 20 in A5, 20 out of A6
19 people were very good.

Example 9 HTO sol (HTO sol produced according to (1) of Example 1, having an average particle size of HTO of 0.03 to 0.05 μm, a synthetic bentonite content of 10%, and HTO of 20% as titanium oxide,
Water content 70%) 50 parts, titanium oxide 2 parts, talc 5 parts, red iron oxide 0.2 parts, black iron oxide 0.1 part, yellow iron oxide 0.5 part and glycerin 5 parts are uniformly mixed. This mixture was uniformly mixed and dispersed in a mixed solution containing 7 parts of ethyl alcohol and 32.2 parts of water to prepare a white powder for sunscreen. The above-mentioned various tests were conducted on this white powder.

As a result, the effect of preventing blackening in the animal and human tests was good (O), the storage stability was good, and no change was observed. 20 panelists in a sensory test
As for the results by people, the number of people in A1 is 20 out of 20, and the number of people in A2 is 20.
19 out of 20, 20 out of 20 in A3, 20 out of 20 in A4
The number of people in A5 was 19 out of 20, and the number in A6 was 19 out of 20. The color development (color appearance) was also very natural and good.

Comparative Example 7 Instead of HTO sol, ultrafine titanium oxide (average particle size
Comparative Example 3 was carried out in the same manner as in Example 9 except that 0.03 to 0.05 μm) was used to obtain a whitening sunscreen powder for comparison. The above-mentioned various tests were conducted on this white powder. As a result, the effect of preventing blackening of the moving body and human body was rather poor (△) and the storage stability was poor, and the titanium oxide aggregates were considerably precipitated. In the practical characteristics test, the number of A1 was 7 out of 20, the number of A2 was 6 out of 20, the number of A3 was 9 out of 20, and the number of A6 was 10 out of 20. It was bad. In addition, the color was reddish black, which was not good.

Example 10 Stearic acid 2.8 parts, propylene glycol monostearate 2.8 parts, self-emulsifying glyceryl monostearate
2.8 parts and 15.0 parts of liquid paraffin are heated to 70 ° C and uniformly dissolved. (A) 7 parts of titanium oxide, 0.5 part of red iron oxide, 1.0 part of yellow iron oxide, 0.2 part of black iron oxide and 1.3 parts of talc are uniformly mixed. (B) Triethanolamine 1.4 parts, propylene glycol 5
Parts, 1.4 parts of sodium lauryl sulfate, an appropriate amount of preservative, 92.2 parts of purified water and HTO sol (HTO sol produced according to (1) of Example 4, wherein HTO contains 20% as titanium oxide, HTO has an average particle size of 0.03 to 0.05 μm, a laponite content of 7%, and a water content of 75%) 50 parts are heated to 70 ° C. and uniformly dissolved and dispersed. (C) Next, (B) was uniformly dispersed in (C), then added to (A) to emulsify and cool to prepare a sunscreen foundation.

As a result of the test, the effect of preventing blackening in the animal and human body tests was good (good), the storage stability was good, and no change was observed. In the sensory test, the results by 20 panelists were that the number of people in A1 was 20 out of 20 and the number of people in A2 was
19 out of 20, 19 in A3, 20 out of 20 in A4
There were 20 people, A5 had 19 people out of 20, and A6 had 19 people out of 20, which was very good. Also, color development (color appearance)
Was also very natural and preferable.

(Effects of the Invention) The present invention contains a specific aqueous sol in which fine particles of metatitanic acid are uniformly and stably dispersed by a clay mineral, thereby transmitting visible light and absorbing harmful ultraviolet rays that cause sunburn. Prevents skin blackening (sunburn), has good stability over time, and has good skin safety. When applied, it gives a good feel to the skin, spreads well, adheres smoothly, and has a smooth finish (powderiness). It is possible to provide an excellent sunscreen cosmetic that does not exhibit whitening or pale coloring.

[Brief description of drawings]

Figure 1 shows the absorbance and wavelength (n
The relationship with m) is shown. A of the curve is an aqueous sol of metatitanic acid of the present invention (the above-mentioned HT
O sol). B is an aqueous dispersion of ultrafine titanium oxide. C is an ordinary aqueous dispersion of titanium oxide.

Claims (4)

[Claims] 1. A sunscreen cosmetic comprising, as a main component, an aqueous sol in which at least one of clay minerals is dissolved as a stabilizer in water, whereby fine particles of metatitanic acid are uniformly and stably dispersed. 2. The sunscreen cosmetic according to claim 1, wherein the clay mineral is a montmorillonite mineral. 3. The fine particles of metatitanic acid have an average particle size of 0.00
The sunscreen cosmetic according to claim (1), which has a thickness of 5 to 0.1 μm. 4. The sunscreen cosmetic according to claim 1, wherein at least one of the clay minerals is contained in the range of 0.05 to 10% by weight based on the total amount of the final composition.