JPH09235217A - Inorganic powder and cosmetics using the same - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide an inorganic powder having a high UV protection effect, excellent stability over time, and a good feel, and a cosmetic using the same. SOLUTION: (I) Zinc oxide-containing particle size 0.01 to 10
Silica of μm, (II) ultrafine particulate titanium oxide having a particle size of 0.001 to 0.10 μm, and (III) plate talc to which ultrafine titanium oxide having a particle size of 0.001 to 0.10 μm is attached, mica and / or sericite, And an inorganic powder composed of the inorganic powder.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an inorganic powder and a cosmetic using the same, and more specifically, it has a high effect of preventing ultraviolet rays (UVA, UVB) when compounded into a cosmetic or the like, and has stability over time. The present invention relates to an inorganic powder that exhibits excellent effects in terms of usability and usability, and cosmetics using the same.

[0002]

2. Description of the Related Art Zinc oxide and titanium oxide have been used for sunscreen cosmetics, makeup cosmetics and the like because of their UV protection effects. However, in the case of a cosmetic material containing both zinc oxide and titanium oxide, the stability is extremely poor due to the high surface activity of the particles, causing aggregation of the particles or separation of the cosmetic material or generation of gas. .
Along with this, the reduction of the ultraviolet protection ability has also been a problem. Further, it had a rough feel to the touch and was in a bad state of use.

By eliminating the drawbacks of zinc oxide,
In order to improve stability and to improve the usability,
A silica containing zinc oxide has been proposed (JP-A-7-29).
1615 publication).

[0004]

However, it is difficult to protect ultraviolet rays satisfactorily with silica containing zinc oxide alone, and the cosmetics containing the silica have a feeling that they are sticky to the touch. there were.

Therefore, an object of the present invention is to provide an inorganic powder having a high UV protection effect, excellent stability over time, and a good feel, and a cosmetic using the same.

[0006]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that a zinc oxide-encapsulating silica having a specific particle size and also a super particle having a specific particle size. The inventors have found that the above object can be achieved by blending an inorganic powder composed of fine particle titanium oxide and plate-like talc having the ultrafine particle titanium oxide adhered thereto in a cosmetic, and have completed the present invention.

That is, according to the present invention, (I) zinc oxide-encapsulated silica having a particle diameter of 0.01 to 10 μm and (II) a particle diameter of 0.0
Ultrafine titanium oxide particles of 01 to 0.10 μm, and (III) particle diameter
An inorganic powder characterized by comprising plate-shaped talc, mica, and / or sericite to which ultrafine titanium oxide having a particle size of 001 to 0.10 μm is attached.

Further, the present invention is a cosmetic characterized by containing the above-mentioned inorganic powder.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION (I) Zinc oxide-containing silica having a particle size of 0.01 μm to 10 μm, which constitutes the inorganic powder of the present invention, can be obtained on the market, for example, trade name Sunsphere SZ- 5 (manufactured by Asahi Glass Co., Ltd.) and the like. To encapsulate zinc oxide in silica, for example, a solution of a zinc compound is impregnated in silica, followed by hydrolysis and further heat treatment to form zinc oxide, whereby zinc oxide is encapsulated in the pores of silica. Can be made. In the present invention, the production method is not particularly limited as long as it is 0.01 to 10 μm silica containing zinc oxide, and the inclusion amount of zinc oxide in silica is not particularly limited, either. Preferably, it is contained in an amount of 40.00 to 60.00% by weight.

Further, (II) ultrafine particle titanium oxide having a particle size of 0.001 to 0.10 μm can be obtained on the market,
For example, MT-100S, MT-150W, MT-500 manufactured by Teika Co., Ltd.
B, MT-500SA, MT-500HD, MT-600B, MT-600SA (trade name), or Ishihara Sangyo's TTO-55 series, TTO-
51 series, TTO-F1, TTO-F2 (brand name), etc. In the present invention, as long as it is an ultrafine particle titanium oxide having a particle diameter of 0.001 to 0.10 μm, its manufacturing method is not particularly limited.

Further, (III) plate-shaped talc, mica, and sericite to which ultrafine titanium oxide particles having a particle diameter of 0.001 to 0.10 μm are attached are also available on the market. For example, as plate-shaped talc, plate-shaped mica or plate-shaped sericite to which ultrafine particles of titanium oxide having the same particle diameter are attached, Fancy Veil 610MW, 610TW, 6 manufactured by Catalysts & Chemicals Industry Co., Ltd.
10SW, 630MW, 630MW, 630TW, 670TW, 870TW (brand name), etc. In the present invention, the production method thereof is not particularly limited as long as they are plate-like talc, plate-like mica or plate-like sericite to which ultrafine particles of titanium oxide having a particle size of 0.001 to 0.10 μm are attached. .

The inorganic powder of the present invention comprises the above-mentioned (I) to (II
If the particle size of the constituent powder (I) is less than 0.01 μm, sufficient protection against ultraviolet rays by zinc oxide cannot be achieved, while if it exceeds 10 μm, a rough feeling is produced and the silica feels. It also becomes stronger and the constituent powders (II) and (III)
If the particle size is less than 0.001 μm, it easily aggregates and is unstable, while if it exceeds 0.10 μm, sufficient UV protection cannot be achieved.

In the inorganic powder of the present invention, the weight ratio of the above-mentioned powders (I) to (III) is preferably 1 to 10: 1.
Within a range of from 10: 1 to 10, more preferably from 1 to 5:
4-8: 1-5. If it deviates from this range, synergistic enhancement of the ultraviolet protection ability by zinc oxide and titanium oxide cannot be expected, and the feeling of use will be deteriorated, which is not preferable.

Further, the inorganic powder of the present invention may be surface-treated, and it is preferable to use one which has been surface-treated with methylpolysiloxane, methylhydrogenpolysiloxane or the like.

Next, the cosmetic material of the present invention will be specifically described. In addition to the above-mentioned inorganic powder of the present invention, other inorganic powder can be added to the cosmetic of the present invention.
There is no limitation on the type and amount of the compound as long as it does not impair stability and gives a good feel. Another inorganic powder that can be added is TTO-F2 manufactured by Ishihara Sangyo Co., Ltd., which is fine titanium oxide containing iron.
(Trade name) or Trecelum ZP-55 manufactured by Toray Industries, Inc.
0, ZP-4000, ZP-550IT, S-IT, ZS-5000IT, Ceraeculan, Ceraeclain, T-BN-C, T-BN-S (trade name) and the like.

With respect to the components other than the inorganic powder of the cosmetic of the present invention, the kind and the amount thereof are not limited as long as the stability is not impaired and the good feel is provided. Hereinafter, various components that can be added to the cosmetic of the present invention will be exemplified.

First, the silicone oil is not particularly limited, but specific examples include octamethyltrisiloxane, decamethyltetrasiloxane, methylpolysiloxane, and highly polymerized methylpolysiloxane having a viscosity of 10,000 to 1000000 cps. Dimethyl silicone oil; octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane,
Cyclic silicon such as methylcyclopolysiloxane; methylphenylpolysiloxane, methylhydrogenpolysiloxane, and the like.

Further, the following can be added as a surfactant. The polyoxyalkylene-modified organopolysiloxane-based surfactant has the following general formula (A): (In the formula, R ₁ represents a hydrogen atom, an acyl group, and a carbon number of 1
A group selected from the group consisting of alkyl groups of
a is 5 to 50, b is 0 to 50, m is 30 to 700, and n is an integer of 1 to 10), and the HLB value is 3 to 1
The polyoxyalkylene-modified organopolysiloxane-based surfactant of 5 has an HLB value of preferably 5 to 10.

Examples of nonionic surfactants include polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, fatty acid monoglyceride, sucrose fatty acid ester, and higher esters. Examples thereof include fatty acid alkanolamides.

There is no problem in blending a cationic surfactant or an anionic surfactant unless the stability and the feel are further impaired.

As the oily component, for example, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, 12-hydroxystearic acid, linoleic acid, oleic acid, linoleic acid, arachidonic acid, and ethanol. Higher fatty acids such as icosapentaenoic acid, liquid paraffin, hydrocarbons such as ozokerite, pristane, ceresin, vaseline, and microcrystalline wax, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate. , Myristyl myristate, Decyl oleate, Hexyldecyl dimethyloctanoate, Cetyl lactate, Myristyl lactate, Lanolin lactate, Isocetyl stearate, Isocetyl isostearate, 12-Hydride Kishisutearin acid cholesteryl,
Ethylene glycol di-2-ethylhexylate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, tri-2-ethylhexyl acid Trimethylolpropane, trimethylolpropane triisostearate, tetra-2-ethylhexyl pentane erythritol, tri-2-ethylhexyl glycerin, 2-ethylhexyl cetyl, 2-ethylhexyl palmitate, glyceryl trimyristate, glyceryl trioctanoate, Glyceryl triisopalmitate, castor oil fatty acid methyl ester, oleyl oleate, 2-heptylundecyl palmitate,
Esters of diisobutyl adipate, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, diisopropyl sebacate, capryl Alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol,
Stearyl alcohol, aralkyl alcohol, behenyl alcohol, oleyl alcohol, cetostearyl alcohol, monostearyl glyceryl ether (batyl alcohol), 2-decyl tetradecanol, 2-hexyl decanol, 2-hexyl decanol, 2-octyl dodecanol, lanolin alcohol. , Higher alcohols such as cholesterol, phytosterol, isostearyl alcohol, avocado oil, camellia oil, macadamia nut oil, corn oil, olive oil, evening primrose oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil Oil, hydrogenated castor oil, linseed oil, safflower oil, cottonseed oil, soybean oil, peanut oil, tea seed oil, rice bran oil, cinnamon oil, jojoba oil, germ oil, almond oil, cacao butter, palm oil, horse fat Shea butter, hydrogenated coconut oil, turtle oil, mink oil, squalene, squalane, orange raffine oil, beef tallow, sheep fat, lard, mokuro, whale fat, lanolin, lanolin alcohol, hydrogenated lanolin, lanolin acetate, liquid lanolin, lanolin Animal and vegetable oils such as fatty acid isopropyl, lanolin fatty acid isostearyl, lanolin fatty acid cholesteryl, reduced lanolin, jojoba wax, hard lanolin, shellac wax, jojoba alcohol, red 225
No., Red No. 218, Daidai No. 201, Green 202
No., purple 201 etc. oil-soluble dye, mica titanium, red iron oxide-treated mica titanium, yellow iron oxide treated mica titanium, black iron oxide treated mica titanium, iron oxide / yellow iron oxide treated mica titanium, iron oxide / black iron oxide treated Pigments such as titanium mica, turquoise treated mica titanium, carmine treated mica titanium, 2-ethylhexyl paramethoxycinnamate, benzophenone, 2-hydroxy-4-methoxybenzophenone, 2-ethylhexyl paradimethylaminobenzoate, 4- (3, 4-dimethoxyphenylmethylene) -2,5-dioxoimidazolidine-1-propionic acid 2-ethylhexyl ester, 2,4,6-trianilino-p- (carbo-2'-
UV absorbers such as ethylhexyl-1-oxy) 1,3,5-triazine, 4-tert-butyl-4′-methoxy-benzoylmethane, furanone derivatives, tocopherol, tocopherol acetate, vitamin A, vitamin A derivatives, ergocalci Ferrol, oil-soluble arnica extract,
Examples thereof include oil-soluble active ingredients such as oil-soluble Stellaria root extract, cholesterol and cholesterol derivatives.

The plant extract may be oil-soluble, water-soluble, or may be extracted by any method, such as sardine, shikon, chamomile,
Gentian, psyllium, aloe, liquorice, genus ginger, sugi, senkyu, peony, carrot, horse chestnut, salvia, sia, chamomile, mulberry, burdock, salvia, shinano, white birch, horsetail, pearl millet, leaf cornflower, myrtle, pearl millet , Hops, peach leaves, yokinin, rosemary and the like.

The lower alcohol is not particularly limited, but methanol, ethanol, i-propanol, n-propanol, t-butanol, s-butanol and the like are used.

The cosmetic composition of the present invention may contain any component other than the above components in a qualitative and quantitative range that does not impair the effects of the present invention. Ingredients such as purified water, ethanol, emulsifier,
Oily ingredients, surfactants, moisturizers, antioxidants, preservatives,
Fragrances, various vitamin agents, chelating agents, coloring agents, animal and plant extracts, thickeners, ultraviolet absorbers, medicinal components and the like can be added. In addition, the dosage form of the cosmetic of the present invention is arbitrary, for example, blusher, eyeliner, eye shadow, foundation, cake type foundation, white powder,
It can be a wide variety of creams, emulsions, lotions and the like.

[0025]

EXAMPLES Examples, Comparative Examples 1 to 4 Next, the present invention will be more specifically described with reference to Examples and Comparative Examples. Each cosmetic was prepared according to the formulation shown in Table 1 below. In the following, the blending amount is% by weight. A stability (50 ° C, 20 ° C) test for one month was performed on the obtained cosmetics, and a touch test was conducted.
Apply 8mg to 4cm ² at a rate of 2mg / cm ^{2 on} the right forearm,
The sticky feeling, powdery feeling and sun protection feeling were evaluated. In addition, the sunscreen feeling is 4
It is the feeling after irradiation for hours. The evaluation was performed according to the following criteria. ◎: Very good ○: No particular problem ×: Poor

[0026]

[Table 1]

1) Silica having a particle diameter of 5.0 μm containing 50.00% by weight of zinc oxide 2) Ultrafine titanium oxide (MT-50) having a particle diameter of 0.035 μm
0SA) powder treated with methylpolysiloxane 3) Powder obtained by surface-treating plate-shaped talc (Fancy Veil 630TW) with ultrafine titanium oxide particles having a particle size of 0.06 μm by methylhydrogenpolysiloxane 4) In the polyoxyalkylene-modified organopolysiloxane-based surfactant represented by the general formula (A),
In the formula, R ₁ is a methyl group, a is 7 to 15, b = 0, and m is 5
It is a mixture of 0 to 100 and n is an integer of 1 to 5, and has an HLB value of 5 (SH3775C (trade name) manufactured by Toray Dow Corning Silicone Co., Ltd.). 5) It was extracted with purified water containing 50% 1,3-butylene glycol.

As is clear from the evaluation results shown in Table 1,
The cosmetics of the examples gave very good results in both feel and stability. In contrast, Comparative Example 1
As described above, when zinc oxide is used as it is without being encapsulated in silica, both stability and feel are deteriorated. Also,
As in Comparative Example 2, it can be seen that the feel and sun protection are significantly impaired unless titanium oxide is added. Further, as in Comparative Example 3, when titanium oxide having a particle diameter of 0.3 μm is blended, agglomeration occurs, and as a result, the stickiness due to titanium oxide becomes strong. Furthermore, Comparative Example 4
As described above, unless tabular talc to which ultrafine titanium oxide having a particle diameter of 0.06 μm is adhered, the feeling of slippage due to talc disappears and a reduction in the sunburn preventing effect cannot be avoided.
It is no longer suitable as a cosmetic.

[0029]

As described above, in the inorganic powder of the present invention, zinc oxide-encapsulating silica having a specific particle size, and ultrafine titanium oxide having a specific particle size and Since it is composed of a plate-shaped talc or the like to which fine particle titanium oxide is attached, it has a high ultraviolet protection effect, is excellent in stability over time, and can give a good feel. Therefore, cosmetics containing this inorganic powder have extremely excellent effects on these characteristics.

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display area C09C 1/04 PAE C09C 1/04 PAE 1/36 PAT 1/36 PAT 3/06 PBS 3/06 PBS

Claims (2)

[Claims] 1. A particle diameter of (I) zinc oxide encapsulated from 0.01 to
10 μm silica, (II) plate-shaped talc, mica and / or sericite to which ultrafine titanium oxide having a particle diameter of 0.001 to 0.10 μm and (III) ultrafine titanium oxide having a particle diameter of 0.001 to 0.10 μm are attached, An inorganic powder characterized by comprising: 2. A cosmetic comprising the inorganic powder according to claim 1 blended therein.