JPS63132821A - Anti-suntan cosmetic - Google Patents

Abstract

PURPOSE:To obtain an anti-suntan cosmetic having moderate masking power, giving natural finishing and exhibiting sufficient ultraviolet scattering effect, by compounding resin powder coated with zinc oxide or zinc oxide and other inorganic powder. CONSTITUTION:An anti-suntan cosmetic having excellent effect to protect the skin from harmful ultraviolet radiation and good applicability, giving excellently finished skin and having astringent effect as well as anti-inflammatory effect of zinc oxide can be produced by compounding resin powder coated its surface with zinc oxide or zinc oxide and one or more other inorganic powder such as talc, mica, titanium oxide, kaolin, chromium oxide, etc. The amount of the compounded resin powder is 0.1-60wt%, preferably 0.5-20wt% based on the whole anti-suntan cosmetic. The average particle diameter of zinc oxide and other inorganic powder is about 0.1-1mu each, especially 0.01-0.1mu each and is preferably 1/1,000-1/5 of the average particle diameter of the resin powder.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sunscreen cosmetic that protects the skin from ultraviolet rays.

[Prior art] Excessive exposure to ultraviolet rays from the sun can cause acute inflammation of the skin, and long-term exposure can cause premature aging of the skin.
It is known to cause age spots, wrinkles, and skin cancer.

As the effects of ultraviolet rays on the skin become clearer, there is an increasing demand for sunscreen cosmetics for the purpose of protecting the skin from ultraviolet rays.

Sunscreen cosmetics contain UV absorbers and UV scattering agents to block UV rays.

Benzophenone-based, cinnamic acid-based, and benzoic acid-based UV absorbers are known, but these often have narrow UV absorption bands and are not necessarily sufficient to prevent a wide range of UV rays. First, if it interacts with other ingredients in cosmetics and deteriorates the stability of the product, or if the amount is increased to enhance the UV absorption effect, problems may arise in terms of skin safety.

Therefore, ultraviolet scattering agents are used to block a wide range of ultraviolet rays. Inorganic pigments such as titanium oxide, iron oxide, zinc oxide, kaolin, and calcium carbonate are used as ultraviolet scattering agents, and among them, titanium oxide and zinc oxide in the form of fine particles of 1 μm or less are said to have excellent ultraviolet scattering effects. (
(Japanese Patent Publication No. 47-42502, Japanese Patent Application Laid-Open No. 60-231607) [Problems to be Solved by the Invention] In general, these ultraviolet f/! Inorganic pigments that exhibit the A-scattering effect are highly safe for the skin and exhibit a wide range of UV-scattering effects, but the effect is small and a large amount must be added in order to have a sufficient UV-scattering effect. However, when applied to the skin, it creates a heavy makeup state, resulting in an unnatural finish. Fine particles of titanium oxide and zinc oxide have been disclosed as improving these drawbacks, but in reality, when incorporated into cosmetics, they cause secondary aggregation and do not have sufficient sun protection effects. In addition, it has a problem in that it does not spread well when used as a cosmetic.

As a technology similar to the present invention, there is a "sunscreen cosmetic" disclosed in JP-A-61-194013, which uses insoluble polymer compound particles to which titanium oxide is attached, but titanium oxide has a poor covering power. It is too expensive and generally has 6 to 7 times more hiding power than zinc oxide, so if it is adjusted for the purpose of increasing the UV scattering effect, it has the problem of creating a heavy makeup state.

[Means for Solving the Problems] In view of the above circumstances, the present inventors have conducted intensive research to solve the above problems, and have found that zinc oxide, which has a lower ultraviolet scattering effect than titanium oxide, can be used as a core for resin powder. It has been found that when made into a composite powder coated with titanium oxide, it exhibits a UV scattering effect superior to that of titanium oxide. Furthermore, when the zinc oxide-coated resin powder is blended into a sunscreen cosmetic, a sunscreen cosmetic that has an appropriate hiding power, a natural finish, and a sufficient ultraviolet scattering effect can be obtained; It has been discovered that a similar effect is exhibited by a coated resin powder coated with zinc oxide and other inorganic powders, and the present invention has been completed based on these findings.

That is, the present invention provides a sunscreen cosmetic containing a resin powder whose surface is covered with zinc oxide or zinc oxide and one or more other inorganic powders.

Hereinafter, the configuration of the present invention will be explained in detail.

The zinc oxide used in the present invention may be any zinc oxide commonly used in cosmetics, and may be modified alone or in combination with gold M oxide or higher fatty acid soap. The average particle diameter is preferably about 0.01 to 1 μ, more preferably 0.01 to 0.1 μ.

Other inorganic powders used in the present invention include, for example, talc,
Examples include mica, titanium oxide, kaolin, chromium oxide, yellow iron oxide, red iron oxide, black iron oxide, barium sulfate, navy blue, ultramarine blue, aluminum hydroxide, aluminum silicate, anhydrous silicic acid, hydrated silicic acid, etc. . These powders may be modified singly or in combination with metal oxides, higher fatty acid soaps, and the like. Average particle size is 0
．． Approximately 0.01 to 1μ is preferable, and roughly 0.0μ is preferable.
It is 1 to 0.1μ.

The average particle size of zinc oxide and other inorganic powders is preferably selected to be in the range of 1/1000 to 115 of the average particle size of the resin powder.

Examples of the resin powder used in the present invention include polyester, polyethylene, polystyrene, polymethyl methacrylate, cellulose, chitin, chitosan, 12-nylon, 6-nylon, epoxy resin, acrylic resin, methacrylic resin, Teflon, and polyvinyl chloride. Although the shape of these resin powders is not particularly limited, they are generally spherical or irregular in shape, and may or may not be porous. The average particle size used is about 1 to 100 parts.

To produce the resin powder coated with zinc oxide or zinc oxide and other inorganic powder used in the present invention, for example, zinc oxide (or zinc oxide and other inorganic powder) and resin powder are mixed in a dry or wet process. made by mixing with.

As the mixing device, various ball mills, bot mills, mortars, crushers, attritors, etc. can be used.

When mixing zinc oxide (or zinc oxide and other inorganic powder) and resin powder, the ratio is 0.00 parts of zinc oxide (or zinc oxide and other inorganic powder) to 100 parts of resin powder.
1 to 200 parts is preferred.

When blending zinc oxide or resin powder coated with zinc oxide and other inorganic powder (hereinafter simply referred to as coated resin powder) into sunscreen cosmetics, it may be blended as is, but it may be dispersed. For the purpose of improving stability and usability, surface modification methods commonly used for cosmetic powders, such as active agent treatment,
Metal soap treatment, silicone treatment, etc. may also be performed.

The amount of coating resin powder not included is 0.1 to 0.1% of the total amount of sunscreen cosmetics.
The amount is 60% by weight, preferably 0.5 to 20% by weight. If it is less than 0.1% by weight, a sufficient ultraviolet scattering effect cannot be expected, and if it exceeds 60% by weight, it is not practical in terms of usability.

In addition to the above-mentioned essential components, the sunscreen cosmetic of the present invention may contain avocado oil, camellia oil, turdle oil, macadamia nut oil, within a quantitative and qualitative range that does not impair the effects of the present invention. , corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil,
Sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, shinakiri oil, Japanese tung oil, jojoba oil, germ oil,
Liquid fats and oils such as triglycerin, glyceryl trioctanoate, glycerin triisopalmitate, cacao butter, coconut oil, tallow, hydrogenated coconut oil, palm oil, beef tallow, mutton tallow, hydrogenated beef tallow, palm kernel oil, pork fat, beef bones Solid oils and fats such as fat, Japanese wax kernel oil, hydrogenated oil, beef leg fat, Japanese Japanese wax, hydrogenated castor oil, beeswax, candelilla wax, cotton wax, carnauba wax, paiberry wax, privet wax, spermaceti wax, montan wax, nut wax, lanolin, kapok wax, acetic acid lanolin, Liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, mono-component lanolin, Jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate,
Waxes such as POE cholesterol ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, liquid paraffin, osichelite,
Oils such as hydrocarbons such as squalene, blistane, paraffin, ceresin, squalane, petrolatum, microcrystalline wax, polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid , mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, bile salts, dl
- Pyrrolidone carboxylate, short chain soluble collagen, diglycerin (EO), moisturizing agent such as PO adduct, para-aminobenzoic acid (hereinafter abbreviated as PABA), PABA monoglycerin ester, NlN-dipropoxy PABA ethyl ester, N,N- Jetoxy PABA ethyl ester, N,N-dimethyl PABA ethyl ester, N,H
- Benzoic acid-based UV absorbers such as dimethyl PABA butyl ester, N,N-dimethyl PAB methyl ester, anthranilic acid-based UV absorbers such as homomenthyl-N-acetylanthranilate, amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl Salicylic acid UV absorbers such as salicylate, phenyl salicylate, pendyl salicylate, p-isobrobanol phenyl salicylate, octyl cinnamate, ethyl-4-isopropyl cinnamate, methyl-2,5
-diisopropylcinnamate, ethyl-2,4-diisopropylcinnamate, methyl-2,4-diisopropylcinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, inamyl-p-methoxycinnamate, octyl -p-methoxycinnamate (2-ethylhexyl-p-methoxycinnamate), 2-ethoxyethyl-p-methoxycinnamate, cyclohexyl-p-methoxycinnamate, ethyl-α-cyano-β-phenyl cinnamate,
Cinnamic acid UV absorbers such as 2-ethylhexyl-α-cyano-β-phenylcinnamate, glyceryl mono-2-ethylhexanoyl diparamethoxycinnamate, 2.4-dihydroxybenzophenone, 2.2'- Dihydroxy-4-methoxybenzophenone, 2.2'-
dihydro-a-xy-4,4'-dimethoxybenzophenone,
2.2', 4.4''-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-
Hydroxy-4-methoxy-4°-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5
-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenylubensiphenone-2-
Benzophenone ultraviolet absorbers such as carboxylate, 2-hydroxy-4-n-octoxybenzophenone, 4-hydroxy-3-carboxybenzophenone, 3-
(4°-methylbenzylidene)-d, 1 camphor, 3
-Benzylidine-d, l-camphor, urocanic acid, urocanic acid ethyl ester, 2-phenyl-5-methylbenzoxazole, 2,2'-hydroxy-5-methylphenylbenzotriazole, 2-(2'-hydroxy-5 '-7-octylphenyl riazole, 2-(
2°-Hydroxy-5°-methylphenylbenzotriazole, dibenzalazine, dianisoylmethane, 4-methoxy-4'-t-butyldibenzoylmethane, 5-(
3. Ultraviolet absorbers such as 3-dimethyl-2-norbornylidene)-3-pentan-2-one, surfactants, thickeners, fragrances, drugs, antioxidants, chelating agents, pigments, water, preservatives and anti-molds. Ingredients commonly used in cosmetics, such as agents, can be blended.

The sunscreen cosmetic of the present invention may be in any form such as powder, cream, paste, stick, lotion, etc., and is not limited to these forms.

Next, an example of manufacturing the coated resin powder will be shown.

Production Example 1 Production of 15% Zinc Oxide Coated Nylon Powder 150g of zinc oxide with an average particle size of 0.05μ and an average particle size of 5μ
850 g of spherical nylon powder was placed in a rotary ball mill with a capacity of 5 and processed for 3 hours.

Observation with an electron microscope revealed that the surface of the obtained powder was nylon powder completely coated with zinc oxide.

Production Example 2 Production of 40% Zinc Oxide Coated Polyethylene Powder 400g of zinc oxide with an average particle size of 0.1μ and an average particle size of 10μ
600 g of polyethylene powder and 5Q. The mixture was placed in a large-capacity vibrating ball mill and treated for 1 hour.

Observation with an electron microscope revealed that the surface of the obtained powder was polyethylene powder completely coated with zinc oxide.

[Example] Hereinafter, the present invention will be explained in detail with reference to Examples. The present invention is not limited by these. All compounding amounts are weight %.

Example 1 Sunscreen dual-use foundation 015% Zinc oxide coated nylon powder 20.0% (Production example 1) ■Silicone treated mica 40.0■Silicone treated talc 20.450 Silicone treated iron oxide 7650 Trimethylolpropane triisostear Rate 5.0 0 Squalane 3.00 Piece Wax 2.0 ■ Sorbitan Triolate 1.0 ■ Propylparaben 0.50 Vitamin E O. 050 fragrance
0.5Φ~■ were mixed in a Henschel mixer, and a heat-dissolved mixture of 0~■ was added, mixed and pulverized, and this was molded into a medium plate to obtain a sunscreen and dual-use foundation.

Example 1 spread easily and gave a natural finish.

Comparative Example 1 Anti-tanning dual-use foundation In the formulation of Example 1, excluding ■, zinc oxide 3% and nylon powder 1
A sunscreen and dual-use foundation was obtained in the same manner as in Example 1 by blending 7% of each without any coating treatment.

Comparative Example 1 did not spread well and was not satisfactory in terms of feeling of use.

Example 2 Sunscreen cream Φ40χ Zinc oxide coated polyethylene 5.0% (
Production example 2) ■Setanol 5.0■Stearic acid 3.0■Vaseline
5.00 Squalane
2.00 isopropyl myristate
2.00 liquid paraffin
5.0 ■ Glyceryl monoisostearate 3.0 ■ Ethylparaben 0.20 Fragrance
0.20 glycerin
10.00 Propylene glycol
5.00 Hyaluronic acid
0.01 ■ Potassium hydroxide 0.
20 Purified water 54.39Φ～
[F] is heated and stirred at 70°C to form an oil phase.

◎ ~ [Phase] is heated to 70°C and completely dissolved, and then used as an aqueous phase. The oil phase is mixed with the water phase and emulsified using an emulsifier.

The emulsion was cooled to 30°C in a heat exchanger and then filled to obtain a sunscreen cream.

Comparative Example 2 Sunscreen cream In the formulation of Example 2, 2% zinc oxide and 3% polyethylene powder were each added without coating, except for (3), and sunscreen was applied in the same manner as in Example 2. Got the cream.

Example 3 Sunscreen lotion 030% zinc oxide coating Polymethyl methacrylate 7. O'X.

■Stearic acid 1.00 Dimethylpolysiloxane (5CS/25℃) 10.0ΦGlyceryl monostearate 1.5 0 Ethylparaben 0.20 Butylparaben 0.2■ Drinks
0.15 ■ Glycerin
5,0 ■ Montmorillonite
0.50 Potassium hydroxide 0
．． 20 Purified water 74.25Φ
Heat and stir ~■ at 70°C to combine with the oil phase. ■~70 O
Heat to ℃ to completely dissolve and form an aqueous phase. The oil phase is mixed into the water phase and emulsified using an emulsifier. The emulsion was cooled to 30°C in a heat exchanger and then filled to obtain a sunscreen lotion.

Comparative Example 3 Sunscreen lotion In the formulation of Example 3, except for Φ, 2.1% of lead oxide and 4.9% of polymethyl methacrylate were blended without being coated separately. Obtain sunscreen lotion in the same manner as above.

Example 4 Sunscreen powder foundation ■10
χ Zinc oxide coated nylon powder 16.0 χ ■ Talc 20.8 ■ Muscovite
50. OO red iron oxide
1.00 yellow iron oxide
0.7■Black iron oxide
0.10 dimethylborisaxane (5C5/2S°C) 1
．． O■ Cetyl 2-ethylhexanoate 9.0■
Sorbitan Sesquiolate 1.0 [F] Propylparaben 0.30 Fragrance
0.1Φ~■ were mixed in a Henschel mixer, and to this mixture, ■~O were heated and mixed, which was then mixed and pulverized, and this was molded into a medium plate to obtain a sunscreen powder foundation.

Comparative Example 4 Sunscreen Powder Foundation Except for Φ in the formulation of Example 4, 1.6% zinc oxide and 14.4% nylon powder were each blended without coating, and the same method as Example 4 was used. So I got a powder foundation to prevent sunburn.

Examples 1 to 4 and Comparative Example 1 obtained as above
-4 were measured for their ultraviolet shielding effects.

The measurement of the ultraviolet shielding effect was carried out using the ultraviolet ray sensitive composition described in Japanese Patent Application No. 60-250678. The method for producing the ultraviolet-sensitive composition will be described below.

A solution consisting of 1.0 g of leuco crystal violet, 0.1 g of tetrabromodimethyl sulfone, 10 g of ethylene-vinyl acid copolymer, and 100 rnt of toluene is prepared and used as Solution I. Separately, 7 g of N,N-dimethylpara-aminobenzoic acid-2-ethylhexyl ester, 10 g of ethylene-vinyl acetate copolymer, and 100 m of toluene.
A solution consisting of M is prepared and designated as solution II.

First, apply Liquid I to a solid content of 1 g/m2 on the photographic base paper, and after drying, apply Liquid H on top of the same with a solid content of 5 g/m2.
A UV-sensitive composition is obtained.

This ultraviolet-sensitive composition is a paper whose color changes from white to pale purple to purple to deep purple when irradiated with ultraviolet rays as the amount of ultraviolet irradiation increases.

40 mg of the sample determined by iF, l' is mixed in 12 g of castor oil and uniformly dispersed by roller treatment. A transparent PET film was placed on top of the above UV-sensitive composition in a circular shape with a diameter of 5 cI11, and 1.5 g of the film was applied onto it in a uniform thickness, and a UV lamp was irradiated for 8 minutes to prepare a sample of the PET film. Using a Hitachi 607 spectrophotometer, the color of the UV-sensitive composition that has been removed and colored is determined based on the color of the UV-sensitive composition when the amount of UV irradiation is zero.
Color differences were calculated in the AB coordinate system.

The results are shown in Table 1.

(The following is a blank space) Table 1 As can be seen from Table 1, the color difference of the example is smaller than that of the corresponding comparative example, and it can be seen that the ultraviolet shielding effect is higher. That is, it can be seen that the cosmetic f'J containing a coating resin powder containing a composite powder of zinc oxide and resin powder has a better ultraviolet shielding effect than the cosmetic containing simply zinc oxide and resin powder.

Example 5 Anti-tanning loose powder Φ60 Zinc oxide coated polystyrene powder 55.0χ ■Talc 10. O Mica 29.50 Red iron oxide 2.00 Yellow iron oxide
2.0 ■Black iron oxide
1.00 fragrance
0.5Φ~■ were mixed in a Henschel mixer to obtain a loose powder without tanning.

Example 5 had a smooth feeling of use and had a high UV protection effect.

Example 6 Sunscreen stick cosmetic ■ 5% W1 zinc oxide 3% silicic anhydride coated Teflon powder 10.0 pieces ■ Titanium oxide 10.0 ■ Mica 16,0Φ red iron oxide
1.5 ■ Yellow iron oxide
1.5 ■Black iron oxide
1.00 Squalane 3
9.4■ Trimethylolpropanetri-2-ethylhexanoate 10.00 Solid paraffin 6.00 Microcrystalline wax 2.00 Ceresin
1.00 fragrance
0.50 Antioxidant 0.
1■Sorbitan sesquiolate 1.0Φ～■
Add the mixture to the heated and stirred mixture of ■■◎O, mix and grind. Next, a molten @OO was added to the above mixture, thoroughly mixed, and then molded into a stick to obtain a sunscreen stick cosmetic.

Example 6 had a high ultraviolet protection effect and also had excellent makeup longevity due to the sebum solidifying effect of zinc oxide and the sweat absorbing effect of silicic anhydride.

[Effects of the Invention j] The sunscreen cosmetic of the present invention is highly effective in protecting the skin from harmful ultraviolet rays. This is considered to be because the secondary agglomerated state of zinc oxide in the zinc oxide-coated resin powder is completely loosened and becomes a monodisperse state, which is uniformly adhered to the surface of the resin powder. In addition to these properties, it is also easy to use and provides a good makeup finish, and is a sunscreen cosmetic that also has the astringent and anti-inflammatory effects that zinc oxide originally has.

Claims (1)

[Claims] A sunscreen cosmetic containing resin powder whose surface is covered with zinc oxide or zinc oxide and one or more other inorganic powders.