JP2001002545A - Sunscreen cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sunscreen cosmetic excellent in an ultraviolet rays scattering effect and sustainability of the effect and having both a moisture retaining effect without causing excessive delipidization and an excellent usability by including a phospholipid, sterins and a specific inorganic powder in a specific ratio. SOLUTION: This cosmetic contains (A) 0.05-5 wt.%, preferably 0.5-3 wt.%, phospholipid such as a hydrogenated soybean phospholipid, (B) 0.05-5 wt.%, preferably 0.5-3 wt.%, sterins such as cholesterol and (C) 1-30 wt.%, preferably 3-20 wt.%, one or more inorganic powders selected from titanium oxide, zinc oxide and cerium oxide. Moreover preferably the weight ratio (A/B) of the components A and B is 10/1 to 1/1, and the weight ratio [(A+B)/C] of the components (A plus B) and C is 1/1 to 1/10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sunscreen cosmetic, and more particularly to a sunscreen cosmetic having an excellent ultraviolet blocking effect, a high moisturizing effect, and a good feeling of use without stickiness.

[0002]

2. Description of the Related Art Conventionally, sunscreen cosmetics containing an ultraviolet absorber or an ultraviolet scattering agent for preventing sunburn or darkening of the skin due to ultraviolet rays have been marketed. As the ultraviolet scattering agent, an inorganic powder such as titanium oxide or zinc oxide is used, and is blended in various dosage forms such as a solid powder, an emulsion, and an oil depending on the purpose.

[0003]

However, the following problems have been encountered in blending these inorganic powders into sunscreen cosmetics. When a large amount of inorganic powder is blended to enhance the ultraviolet scattering effect, unnecessarily large amounts of sebum and moisture are deprived from the skin, and the moist feeling and smoothness originally possessed by the skin may be impaired. Attempts have been made to prevent excessive degreasing of the skin by using a humectant such as a polyhydric alcohol in combination, but the effect is not sufficient, and on the contrary, the sticky feeling and the weight of the touch may be caused.

Further, since these inorganic powders have a strong cohesive force, it is difficult to disperse them in a sunscreen cosmetic in a uniform state and to maintain the dispersion stability.
For this reason, a method of suppressing the activity of the powder surface by treating the surface of the inorganic powder with a treating agent or dispersing the powder in a sunscreen cosmetic using a surfactant has been taken. However, depending on the surface treatment agent and the surfactant, the dispersibility of the inorganic powder can be improved, but after being applied to the skin, it is re-emulsified with sweat, water, or the like, and flows down. In some cases, and the ultraviolet scattering effect is reduced. Therefore, development of a sunscreen cosmetic which is excellent in ultraviolet scattering effect and persistence of the effect, has a moisturizing effect without excessive degreasing, and has good usability has been desired.

[0005]

Means for Solving the Problems As a result of earnest studies, the present inventors have found that the above problems can be solved by containing an inorganic powder and a specific component, and have completed the present invention. That is, the present invention provides (1) the following components (A) to
(C); (A) 0.05 to 5% by weight of a phospholipid, (B) 0.05 to 5% by weight of sterins, (C) one or more kinds selected from titanium oxide, zinc oxide and cerium oxide A sunscreen cosmetic comprising 1 to 30% by weight of an inorganic powder, and (2) a component (C) selected from metal soaps, silicones, fluorine compounds and fatty acid esters. Or, the sunscreen cosmetic according to (1), which has been subjected to hydrophobic surface treatment with two or more kinds thereof, wherein (3) the weight ratio of the component (A) to the component (B) (A) / (B). ) Is in the range of 10/1 to 1/1, and the total weight ratio of the component (A) and the component (B) to the component (C) is ((A) + (B)) / (C) = 1/1 to 1/1
The present invention relates to the sunscreen cosmetic according to (1) or (2), which is 0. The details will be described below.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Examples of the phospholipid (A) used in the present invention include phosphatidylcholine, phosphatidyltriethanolamine, phosphatidylserine, phosphatidylglycerol, phosphatidylinositol, sphingolipids, and the like. Alternatively, a composition containing them, that is, a soybean lecithin, an egg yolk lecithin, or the like, or a hydrogenated product thereof may also be used. In the present invention, the above phospholipids can be used alone or in combination of two or more. Among them, hydrogenated phospholipids are preferable from the viewpoint of odor and stability.

The content of the component (A) is 0.05 to 5% by weight (hereinafter, simply referred to as “%”), preferably 0.1%.
5 to 3%. If the content of the component (A) is less than 0.05%, sufficient dispersibility and moisturizing effect of the powder cannot be obtained,
On the other hand, if the content exceeds 5%, the odor of the phospholipid becomes strong, and the feeling of stickiness is increased and the feel becomes heavy, which may be undesirable as a dosage form.

The sterins (B) used in the present invention include cholesterol, dihydrocholesterol, cholesteryl stearate, cholesteryl hydroxystearate, cholesteryl fatty acid of macadamia nut oil, β-sitosterol, stigmasterol, campesterol and ergosterol. , 5-dihydroergosterol, phytosterol, and the like. The above sterins can be used alone or in combination of two or more.

[0009] The content of the component (B) is 0.05 to 5%, preferably 0.5 to 3%. When the content of the component (B) is less than 0.05%, only the same moisturizing effect as that obtained when only the phospholipid is contained is obtained. When the content exceeds 5%, crystals of sterins are formed. In some cases, the stability of the precipitated isoform is impaired.

As the inorganic powder of the component (C) used in the present invention, titanium oxide, zinc oxide and cerium oxide are preferably used as an ultraviolet ray blocking agent. The particle diameter and shape are not particularly limited, but among them, fine particle titanium oxide (for example, MT-M manufactured by Teica Co., Ltd.)
500B etc.), spindle-shaped fine particle titanium oxide (for example, Typaque TTO-55 manufactured by Ishihara Sangyo Co., Ltd.), fine particle zinc oxide (for example, ZnO 350 manufactured by Sumitomo Cement Co., Ltd.)
Etc.), and iron-containing fine particle titanium oxide having a blue tint on the coated surface by containing iron (for example, manufactured by Ishihara Sangyo Co., Ltd.)
Tipaque TTO-F-1) and the like are particularly preferable because they have a transparent feeling and have an excellent effect of preventing ultraviolet rays.

The content of the component (C) used in the present invention is 1 to 30%, preferably 3 to 20%.
When the content of the component (C) is less than 1%, a sufficient ultraviolet ray preventing effect cannot be obtained, and the function as a sunscreen cosmetic becomes insufficient. On the other hand, if the content exceeds 30%, not only the spread becomes heavy and the feeling of use is impaired, but also the transparency of the coating film on the skin is lost, and whitening is caused. It may be.

The above-mentioned inorganic powder can be used as it is, but the effect of the present invention can be better exhibited when an inorganic powder surface-treated by a conventional method is used. As a surface treatment method, for example, adsorb fats and oils on the inorganic powder surface,
Metal soap treatment using fatty acid magnesium salt or zinc salt such as magnesium stearate, treatment with perfluoroalkyl group-containing fluorine compound such as perfluoroalkylalkylethyl phosphate diethanolamine salt, use of functional group such as hydroxyl group An oil and fat treatment method in which esterification or etherification is caused to make the inorganic powder lipophilic, and a silicone treatment method using dimethylpolysiloxane or methylhydrogenpolysiloxane.

The sunscreen cosmetics of the present invention can be obtained by blending the above essential components, and the weight ratio (A) / (B) of the components (A) and (B) is 10/1 to 1/1. 1 /
1 and the total weight ratio of component (A) and component (B) to component (C) is ((A) + (B)) /
When (C) = 1/1 to 1/10, the effects of the present invention can be more remarkably exhibited.

The sunscreen cosmetics of the present invention may contain, in addition to the above essential components, components generally incorporated in cosmetics, such as oils, powders, preservatives, pigments, coloring pigments, fragrances, cosmetic ingredients,
A humectant or the like can be used as long as the effects of the present invention are not impaired. Further, the product of the present invention can be blended with a known ultraviolet absorbent in combination, and in this case, a sunscreen cosmetic having an excellent ultraviolet protective effect can be obtained.

The sunscreen cosmetics of the present invention can be used in various forms such as liquid, emulsion, cream, gel and solid powder.

[0016]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

Examples 1 to 8 and Comparative Examples 1 to 5 Sunscreen creams A sunscreen having the composition shown in Table 1 below was prepared by a conventional method, and (a) a sticky feeling and (b) a moist feeling were obtained by the following methods. (C) Good elongation (d) The effect of blocking ultraviolet rays was evaluated. Table 2 shows the evaluation results. % In Examples and Comparative Examples indicates% by weight.

[0018]

[Table 1]

(Note 1) MT-500B manufactured by Teika Co., Ltd. (Note 2) Taipaek TTO-55 manufactured by Ishihara Sangyo Co., Ltd.
(S) surface treated with silicone.

(Manufacturing method) The components (1) to (5) are heated and dissolved at 70 ° C., and the component (6) or (7) is dispersed therein. B. To A, those obtained by heating and dissolving the components (8) to (14) at 70 ° C. were added and mixed to obtain a sunscreen cream.

(Evaluation method) The evaluation items of (a) stickiness, (b) moistness, and (c) good elongation were evaluated using Examples 1 to 8 and Comparative Examples 1 to 2 using 20 female evaluation panels. The sensuality when the sunscreen cream of No. 5 was applied to the face was evaluated on a five-point scale according to the following evaluation criteria (a).
It was determined according to the criterion (b). Evaluation Criteria (a) 5: Very Good 4: Good 3: Normal 2: Slightly Bad 1: Bad Judgment Criteria (b) 平均: Average score of 4.5 or more ○: Average score of 3.5 or more and less than 4.5 △: Average point 2.5 or more and less than 3.5 ×: Average point less than 2.5

(D) Regarding the effect of blocking ultraviolet rays, SPF
Using -290 ANALYZER (manufactured by OPTOMETRICS), a predetermined amount of a sample was applied on a transpore tape (manufactured by 3M) to obtain a test sample. The SPF measurement value of this test sample was evaluated according to the following evaluation criteria (c). Evaluation criteria (c) ◎: 20 or more ○: 10 or more and less than 20 Δ: 5 or more and less than 10 ×: less than 5

[0023]

[Table 2]

As is clear from the results shown in Table 2, the sun creams of Examples 1 to 8 of the present invention satisfy all the evaluation items, have a high moisturizing effect, have a good feeling in use, and have an ultraviolet blocking effect. It was excellent.

Example 9 Sunscreen Emulsion (Components) (%) Hydrogenated soybean phospholipid 1.5 2. Cholesterol 0.53. 3. Sorbitan sesquioleate 1.0 Cetyl isooctanoate 10.0 5. Decamethylcyclopentasiloxane 10.0 6. 6. Fine particle titanium oxide (Note 1) 8.0 Glycerin 5.0 8. Propylene glycol 5.0 9. Carboxyvinyl polymer 0.2 10. Triethanolamine appropriate amount 11. Preservative appropriate amount 12. Appropriate amount of fragrance 13. Remaining purified water (Note 1) MT-500B manufactured by Teica Co., Ltd.

(Manufacturing method) Components (1) to (5) are heated and dissolved at 70 ° C., and (6) is dispersed therein. B. The components (7) to (13) heated and dissolved at 70 ° C. were gradually added to A, and cooled to room temperature to obtain a sunscreen emulsion. Example 9 has good stability and excellent moist feeling,
It was a sunscreen milky lotion with good elongation, no stickiness, and an excellent ultraviolet blocking effect.

Example 10 Sunscreen Cream (Ingredients) (%) Hydrogenated soybean phospholipid 2.5 2. β-sitosterol 0.2 3. 3. Stigmasterol 0.1 Campesterol 0.15. Cetanol 3.0 6. Glyceryl triisooctanoate 10.0 7. 7. Decamethylcyclopentasiloxane 15.0 Silicone surface-treated fine particle titanium oxide (Note 1) 10.0 9. Glycerin 3.0 10. Propylene glycol 5.0 11. Carboxyvinyl polymer 0.2 12. Triethanolamine appropriate amount 13. Preservative appropriate amount 14. Appropriate amount of fragrance 15. Remaining purified water (Note 1) The surface of Typeque TTO-55 (S) manufactured by Ishihara Sangyo Co., Ltd. is treated with silicone.

(Manufacturing method) Components (1) to (7) are heated and dissolved at 70 ° C., and (8) is dispersed therein. B. Components (9) to (15) heated and dissolved at 70 ° C. were gradually added to A, and cooled to room temperature to obtain a sunscreen cream. Example 10 was a sunscreen cream having good stability, excellent moist feeling, good elongation, no sticky feeling, and excellent ultraviolet blocking effect.

Example 11 Sunscreen Powder Foundation (Components) (%) Talc 45.1 2. Mica 5.0 3. Sericite 22.0 4. 4. Fluorine surface-treated titanium oxide (Note 1) 10.0 Bengara 0.8 6. Iron oxide yellow 2.5 7. Black iron oxide 0.18. Liquid paraffin 10.0 9. Sorbitan sesquioleate 3.5 10. 10. Yolk lecithin 0.5 11. Cholesteryl hydroxystearate 0.5 Preservative appropriate amount 13. Appropriate amount of fragrance (Note 1) Titanium oxide surface treated with fluorine by the method disclosed in JP-A-5-58838.

(Manufacturing method) Components (1) to (7) are mixed and dispersed and pulverized. B. Components (8) to (13) were dissolved at 70 ° C.
, Slowly cooled to room temperature and compression molded into a gold pan,
A sunscreen powder foundation was obtained. Example 1
No. 1 was a sunscreen powder foundation which had an excellent moist feeling, good elongation, was non-sticky, and had an excellent ultraviolet blocking effect.

Example 12 Sunscreen Liquid Foundation (Ingredients) (%) Stearic acid 2.5 2. Liquid paraffin 3.0 3. Decamethylcyclopentasiloxane 5.0 4. Sorbitan sesquioleate 2.05. 5. Hydrogenated egg yolk lecithin 1.0 6. Cholesteryl hydroxystearate 0.5 7. Sodium carboxymethyl cellulose 0.2 Bentonite 0.5 9. Propylene glycol 5.0 10. Triethanolamine appropriate amount 11. Purified water balance 12. Preservative appropriate amount 13. Appropriate amount of fragrance 14. 14. Silicone surface-treated titanium oxide (Note 1) 8.0 Bengara 0.5 16. Yellow iron oxide 1.4 17. Black iron oxide 0.1 (Note 1) The surface of Typaque TTO-55 (S) manufactured by Ishihara Sangyo Co., Ltd. is silicon-treated.

(Production Method) Components (1) to (6) are heated and dissolved at 70 ° C. B. Components (7) to (13) heated and dissolved at 70 ° C. are gradually added to A. C. The components (14) to (17) sufficiently mixed and pulverized were added to B, mixed, and cooled to room temperature to obtain a sunscreen liquid foundation. Example 12 was a sunscreen liquid foundation which had an excellent moist feeling, a good elongation, a non-sticky feeling, and an excellent ultraviolet blocking effect.

[0033]

According to the present invention, the respective components of phospholipids, sterins and inorganic powders are contained in specific amounts, respectively, so that they have an excellent ultraviolet blocking effect, a high moisturizing effect and a good feeling of use. A sunscreen cosmetic is obtained.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C083 AB052 AB232 AB241 AB242 AB432 AC022 AC072 AC122 AC242 AC352 AC392 AC442 AC542 AD092 AD172 AD491 AD492 AD571 AD572 BB25 CC12 CC19 DD17 DD23 DD31 EE06 EE07 EE17

Claims (3)

[Claims] 1. The following components (A) to (C): (A) phospholipids 0.05 to 5% by weight (B) sterins 0.05 to 5% by weight (C) Titanium oxide, zinc oxide, oxide A sunscreen cosmetic comprising 1 to 30% by weight of one or more inorganic powders selected from cerium. 2. The tan according to claim 1, wherein the component (C) is subjected to a hydrophobic surface treatment with one or more selected from metal soaps, silicones, fluorine compounds and fatty acid esters. Stop cosmetics. 3. The weight ratio of component (A) to component (B) (A)
/ (B) is in the range of 10/1 to 1/1, and (C)
3. The composition according to claim 1, wherein the total weight ratio of the component (A) and the component (B) to the component is ((A) + (B)) / (C) = 1/1 to 1/10. The sunscreen cosmetics described.