JP2000319156A - Ultraviolet protective - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an ultraviolet protective, excellent in protective effect against ultraviolet ray, and giving, when used for cosmetics, coating color of natural finish, prevented from becoming pale, by including powder having a reflection interference color within a specific color range and superfine titanium oxide particles. SOLUTION: This protective contains (A) powder having a reflection interference color of orange, yellow or gold, and (B) superfine titanium oxide particles. It is preferable that the powder as the component A is prepared by coating a material having a black plane with powder, and has a hue angle (h) of 45 to 110 deg. in the L*C*h color system, when measured for its color by a colorimeter. The example of the component A is mica coated with a metallic oxide, especially titanium or iron oxide. The powders as the component A and B have an average particle size of 100 μm or less and 100 nm or less, respectively. The protective contains the component A preferably at 1 wt.% or more, more preferably 1.4 to 80 wt.%, and the component B preferably at 3.5 wt.% or more, more preferably 3.5 to 20 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultraviolet ray protective agent having an excellent ultraviolet ray protective ability and capable of obtaining a natural coating color.

[0002]

2. Description of the Related Art Fine titanium oxide particles are widely used for the purpose of imparting an ultraviolet protection function to cosmetics, since they have an excellent ultraviolet protection ability and a low degree of application color becomes whitish.

[0003]

However, although the fine particle titanium oxide is excellent in transparency, if it is blended in such an amount that a sufficient UV protection effect can be obtained, the drawback is that the coating color becomes pale and unhealthy. there were. An object of the present invention is to provide an ultraviolet ray protective agent which has an excellent ultraviolet ray protective ability and can provide a natural finish without becoming pale in application color when used as a cosmetic.

[0004]

Means for Solving the Problems The present inventor has found that the above-mentioned problems can be solved by blending a powder having a specific color of reflection interference with fine titanium oxide particles. That is, the present invention provides an ultraviolet ray protective agent containing a powder having a reflection interference color of orange to yellow or gold and fine particle titanium oxide.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The fine particle titanium oxide used in the present invention has an average particle diameter of 100 nm or less, particularly 80 nm.
The following are preferred. The fine particle titanium oxide is subjected to a hydrophobic treatment or a water / oil repellent treatment using a silicone, a fluorine compound (for example, a fluorine compound having a perfluoroalkyl group), a lecithin, an amino acid, a polyethylene, an alkyl phosphoric acid, a metal soap or the like by a usual method. May be done. The method for surface-treating the fine-particle titanium oxide is not particularly limited, and may be performed according to a conventional method. The amount of the treating agent based on the fine-particle titanium oxide is preferably 0.05 to 20% by weight.
(Hereinafter simply indicated by%), more preferably 2 to 10%.

[0006] In the ultraviolet ray protective agent of the present invention, the blending amount of the fine particle titanium oxide is at least 3.5%, particularly 3.5 to 20%, more preferably 3.5% in the whole composition from the viewpoint of the ultraviolet ray protective effect and the control of the coating color. -10% is preferred.

The powder whose reflection interference color is orange to yellow or gold is, for example, a powder that emits an interference color by coating a base powder with a metal oxide, and the interference color is orange to yellow or gold. Yellow or gold are suitable for the present invention. As the powder having the reflection interference color, when a powder sample is applied to a material having a black plane, such as artificial leather, and the color is measured using a commercially available colorimeter (color difference meter), L ^* C ^* h
It is preferable that the hue angle h in the color system be in the range of 45 to 110 °. The interference color is created by controlling the optical thickness of the metal oxide coating the surface of the base powder. Here, examples of the mother powder to be coated include mica, platy titanium oxide, platy iron oxide, platy alumina, platy silica, fish scale foil, bismuth oxychloride, etc., and mica is particularly preferred. Examples of the metal oxide covering the surface thereof include titanium oxide, iron oxide, zirconium oxide, and alumina. These can be used alone or in combination of two or more. Preference is given to titanium, iron oxide or mixtures thereof. When coating is performed using a mixture of titanium oxide and iron oxide, the titanium oxide is preferably rutile and does not contain tin.

Among such powders, those obtained by coating the surface of mica with a metal oxide, particularly titanium oxide, iron oxide or a mixture thereof are preferred. The method of coating the base powder with the metal oxide particles is not particularly limited, and may be performed according to a conventional method.

The average particle size of such a powder is 100 μm or less, preferably 30 μm or less, and more preferably 5 to 25 μm.

This powder may be subjected to a hydrophobic treatment or a water / oil repellent treatment in the same manner as the fine particle titanium oxide. The means for these treatments and the type and amount of the treatment agent may be the same as those in the case of the fine particle titanium oxide.

The amount of the powder is preferably 0.4 to 4 times, more preferably 0.6 to 3.5 times the weight of the fine particle titanium oxide in view of the effect of eliminating the whiteness of the fine particle titanium oxide. Moreover, 1% or more of the total composition, particularly 1.4 to 80%,
Further, it is preferable to add 2.1 to 70%.

The ultraviolet ray protective agent of the present invention may further contain an ultraviolet ray absorbent, an oil agent, and other powders which are usually used in cosmetics. Here, as the ultraviolet absorber, benzoic acid-based,
UV absorbers such as anthranilic acid type, salicylic acid type, cinnamic acid type and benzophenone type. It is preferable that the ultraviolet absorber is added in an amount of 0.1 to 10%, particularly 1 to 5% in the whole composition.

Examples of the oil include silicone oil, fluorine-modified silicone, wax hydrocarbon oil, oils and fats, and higher alcohols. The oil agent is 0.1 to 5 in the total composition.
It is preferable to add 0%, especially 1 to 35%.

The other powder is not particularly limited as long as it is used as an ultraviolet ray protective agent or a cosmetic. Titanium oxide, zinc oxide, titanium oxide-zinc oxide composite, fine particle zinc oxide, flaky oxide Other than zinc, etc., talc, mica, sericite, kaolin, bentonite, vermiculite, zirconium oxide, muscovite, synthetic mica, mica, biotite, lithia mica, magnesium carbonate, calcium carbonate, diatomaceous earth, magnesium silicate, calcium silicate,
Inorganic pigments such as aluminum silicate, barium silicate, strontium silicate, metal tungstate, hydroxyapatite hydrous silicic acid, silicic anhydride, magnesium oxide, zeolite, ceramic powder, aluminum hydroxide, etc .; nylon powder, polyethylene powder, polymethylbenzoguanamine powder, Organic powders such as polymethyl methacrylate powder, polytetrafluoroethylene powder, microcrystalline cellulose, rice starch, lauroyl lysine, silicone powder; calcium stearate, zinc stearate, magnesium stearate, magnesium myristate, calcium cetyl phosphate, cetyl phosphorus Fatty acid metal salt powders such as sodium zincate; metal powders such as aluminum powder, stainless steel powder, and copper powder;

The ultraviolet protective agent of the present invention includes, in addition to the above components, for example, humectants, water-soluble polymers, oil-soluble polymers, polymer latex, various surfactants, fragrances, antioxidants,
Preservatives, drugs, thickeners, plant extracts, ceramides and ceramide-like structural substances, blood circulation promoters, cooling agents, antiperspirants, bactericides, skin activators, pH adjusters, alcohols, water, etc. It can be appropriately compounded within a range that does not impair the effects of the present invention.

The ultraviolet protective agent of the present invention can be used as a cosmetic such as lotion, emulsion, cream, cosmetic oil, gel, foundation, powder, lipstick, blusher, eyeshadow, nail enamel and the like.

[0017]

EXAMPLES Example 1 (Two-Layer Separable Liquid Ultraviolet Protective Agent) Two-layer separable liquid ultraviolet protective agents having the compositions shown in Table 1 were prepared in accordance with the following production methods, respectively. The absence of bluish whiteness was evaluated by the following evaluation method. The compounding amount is% by weight, and the same applies to the following examples unless otherwise specified.

[0018]

[Table 1]

(Manufacturing method) After (8) to (10) were dissolved at room temperature, (1) to (7) were sequentially added and dispersed by a disper. To this, (11) to (16) were added while stirring and emulsified to obtain the desired two-layer separation type liquid ultraviolet protective agent.

(Evaluation Method) With respect to the prepared two-layer separation type liquid ultraviolet protective agent, the absence of bluishness after application was subjected to a sensory evaluation by a 20-person expert panelist, and evaluated according to the following criteria. ◎ ················ 16 or more evaluated that there was no paleness.・ ・ ・: 11 to 15 persons evaluated that there was no paleness. Δ: 6 to 10 persons evaluated that there was no paleness. X: Five or less persons evaluated that there was no paleness.

Further, the UV protection ability of the coating film was measured using an ultraviolet-visible-near infrared spectrophotometer UV-3100PC (manufactured by Shimadzu Corporation). First, a sample is applied to a commercially available tracing paper so as to have a concentration of 0.001 g / cm ² , and the transmittance from the ultraviolet to the visible region is measured using the tracing paper coated with the sample in a sandwich cell made of quartz glass. The UV protection ability was measured according to the following criteria. ······································································································································ 300 Is 75% or more

[0022]

[Table 2]

The product of the present invention was a two-layer liquid UV protective agent which was less bluish when applied and was superior in UV protective effect as compared with the comparative product.

Example 2 (Loose UV protective agent) A loose UV protective agent having the following composition was produced by the following method. (Composition) (% by weight) (1) Titanium oxide coated mica (Timiron super gold, h = 96.5 °) 4.0 (2) Fine particle titanium oxide (average particle size 50 nm) 4.0 (3) Fine particle zinc oxide (average) 1.0 (4) Talc (average particle size 15 μm) Balance (5) Magnesium stearate 5.0 (6) Preservatives proper amount (7) Fragrance trace amount (8) Octyl methoxycinnamate 1.0

(Production method) The components (1) to (6) were stirred and mixed in a blender, and (7) to (8) were sprayed on the mixture, followed by stirring to obtain a desired loose UV protective agent.

Example 3 (Solid UV protection agent) A solid UV protection agent having the following composition was produced by the following method. (Composition) (% by weight) (1) Titanium oxide-coated mica (manufactured by Flamenco satin gold Engelhard, interference color is golden, average particle size 6 μm, h = 93.3 °) 5.0 (2) Fine particle titanium oxide (average particle size) 5.0 (3) Fine particle zinc oxide (average particle size 40 nm) 1 (4) Mica (average particle size 20 μm) Balance (5) Liquid paraffin 8.0 (6) Beeswax 2.0 (7) Preservatives appropriate amount (8) Trace amount of fragrance (9) Octyl methoxycinnamate 2.5

(Production method) Components (1) to (4) are mixed,
Crushed through a crusher. This was transferred to a high-speed blender, and (5) to (9) were heated and mixed to make a uniform mixture, and further mixed to make it uniform. This was treated with a pulverizer, and the particle size was adjusted through a sieve. Then, the mixture was filled in a metal plate and compression-molded to obtain a desired solid ultraviolet protective agent.

Example 4 (Cream UV protection agent) A cream UV protection agent having the following composition was produced by the following method. (Composition) (% by weight) (1) α-mono (methyl-branched stearyl) glyceryl ether 1.5 (2) Perfluoropolyether (FOMBLIN HC-04, manufactured by Ausimont) 12.0 (3) Dimethylpolysiloxane poly Oxyalkylene copolymer 1.5 (4) Dimethylpolysiloxane (KF96A (6 mm ² / s), manufactured by Shin-Etsu Chemical Co., Ltd.) 5.0 (5) Octyl methoxycinnamate 3.0 (6) Fluorination Treated powder Sericite (average particle diameter 11 μm) 4.0 Fine titanium oxide (average particle diameter 50 nm) 4.0 Fine particle zinc oxide (average particle diameter 20 nm) 1.0 (7) Fluorinated powder (Flamenco orange, Engelhard) The interference color is orange, average particle size 25 μm, h = 63.1 °) 4.0 (8) Decamethylcyclopentasiloxane 15.0 (9) Butyl paraoxybenzoate 0.1 (10) Sodium benzoate 0.2 (11) Magnesium sulfate 0.5 (12) Glycerin 5.0 (13) 1,3-butylene glycol 3.0 (14) Water balance (15) Fragrance trace amount

(Production method) Components (1) to (5) are mixed,
Heat and dissolve. The components (6) and (7) are dispersed therein by a disper. Heated components (9) to (1)
The mixture of 4) is gradually added with stirring to emulsify. Thereafter, the mixture was cooled to approximately 30 ° C., components (8) and (15) were added, and the mixture was further cooled to room temperature to obtain a desired creamy ultraviolet protective agent.

Each of the ultraviolet protective agents of Examples 2 to 4 can obtain a natural finish without bluishness at the time of application, and is further excellent in the ultraviolet protective effect.

[0031]

By using the ultraviolet protective agent of the present invention, it is possible to obtain a natural finish excellent in ultraviolet protective effect and free from bluish whiteness at the time of application.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C083 AA082 AB212 AB241 AB242 AB362 AB432 AC022 AC102 AC122 AC172 AC232 AC342 AC482 AD152 AD162 AD172 BB25 BB46 CC19 DD17 DD21 DD31 EE06 EE17

Claims (4)

[Claims] 1. An ultraviolet ray protective agent comprising a powder having a reflection interference color of orange to yellow or gold and fine particle titanium oxide. 2. A powder having a reflection interference color of orange to yellow or gold, which is obtained by applying L ^* C ^* h to a material having a black flat surface and measuring the color using a colorimeter. 2. The ultraviolet protective agent according to claim 1, wherein the hue angle h in the color system is from 45 to 110 [deg.]. 3. The ultraviolet protective agent according to claim 1, wherein the content of the fine particle titanium oxide is 3.5% by weight or more. 4. The fine particle titanium oxide has an average particle diameter of 100 nm.
The ultraviolet protective agent according to any one of claims 1 to 3, which is: