JPH07233029A - Solid cosmetic - Google Patents

Abstract

PURPOSE:To obtain a solid cosmetic excellent in usability and having high impact strength and excellent mildew-proof property by compounding a specific amount of methylphenylpolysiloxane based on the total oil. CONSTITUTION:This solid cosmetic contains methylphenylpolysiloxane of the formula [(n)=10-17] in an amount of 40-100wt.% based on the total oil. The oil is preferably contained in an amount of 3-45wt.% based on the total cosmetic. Further, a hydrophobic powder is preferably contained in an amount of >=70wt.% based on the total powder. This solid cosmetic exhibits excellent slipperiness and stretchability on the skin. When a hydrophobic powder is used as the powder, mildew-proof property is increased and accordingly the quality of cosmetic is sufficiently guaranteed without compounding another antiseptic mildew-proofing agent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid cosmetic having good usability, high impact resistance and excellent antifungal property.

[0002]

2. Description of the Related Art Conventionally, hydrocarbons, triglycerides, ester oils, silicone oils, fluorine-based oils and the like have been used as oil components in pressed powder cosmetics. Silicone oil has come to be widely used especially for the purpose of improving slipperiness on the skin. As the powder, in addition to untreated powder, powder treated with silicone, a fluorine-based compound, a surfactant and the like has been widely used recently.

[0003]

However, in press-type powdery cosmetics, the impact resistance deteriorates if a large amount of silicone oil is added to improve the spreadability of the cosmetics or if spherical powders are added. was there. Further, in powder cosmetics containing about 6% or more oil, it is essential to add a preservative, and parabens are often used as the preservative. However, since parabens are designated as ingredients for cosmetics, it is desired not to mix them for safety reasons.

The inventors of the present invention have good usability such as spreadability,
As a result of diligent studies to obtain a pressed powder cosmetic having strong impact resistance and good mold resistance, it was found that the above object can be achieved by devising the type of oil and the properties of the powder. It came to completion.

[0005]

That is, the present invention relates to a solid cosmetic composition characterized by containing 40% by weight to 100% by weight of methylphenylpolysiloxane represented by the general formula 2 in the total oil content.

[0006]

[Chemical 2] (The average n in the formula is 10 to 17.)

The structure of the present invention will be described in detail below. The methylphenyl polysiloxane used in the present invention is represented by the structural formula shown in the general formula 2. Methylphenylpolysiloxane has been conventionally used in cosmetics. For example, JP-A-61-180707 describes an example in which methylphenylpolysiloxane (500cs) is blended. However, it is strictly composed of dimethyl units and diphenyl units.

On the other hand, in the methylphenylpolysiloxane used in the present invention, a methyl group and a phenyl group are bonded to one silicon, and therefore the viscosity behavior is also different from the conventional one. That is, in the methylphenyl polysiloxane used in the present invention, the average n = 3 and the viscosity is about 20 cs (3
0 ° C, the same below), average n = 7 and viscosity of about 100 cs,
Approximately 300 cs when average n = 12, approximately 500 when average n = 14
cs, and the average n = 17 is about 1000 cs.

In the present invention, in the above formula (2), the average n is 10 to 17, preferably 13 to 15. If the average n is less than 10, the impact resistance is not good and the mildew resistance is weak. When the average value exceeds n = 17, the spreadability is heavy and preferable usability cannot be obtained. The blending amount is 40% by weight or more in the total oil content. If it is less than 40% by weight, favorable usability and impact resistance cannot be obtained.

The total amount of the oil containing methylphenylpolysiloxane is not particularly limited, but is 3 to 45% by weight.
At this time, the effect of improving the impact resistance is most exerted. Three
If it is less than wt%, usability and impact resistance are not preferable. 45
Oil-based solid cosmetics in excess of wt% will give excellent adhesion. If the oil content exceeds 70% by weight, the dosage form cannot be established.

The oil component other than methylphenylpolysiloxane blended in the present invention may be any of those generally blended in cosmetics, for example, avocado oil,
Camellia oil, macadamia nut oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, wheat germ oil, castor oil, safflower oil, cottonseed oil, soybean oil, tea seed oil, rice bran oil, jojoba oil, germ oil, triglycerin, trioctanoic acid Examples thereof include glycerin, glycerin triisopalmitate, liquid paraffin, diisostearyl malate, isostearyl alcohol, isopropyl myristate, 2-octyldodecyl oleate, dimethylpolysiloxane, and fluorine-modified oil.

The powder part may be any of those commonly used in cosmetics, for example, talc, carion, mica, sericite, muscovite,
Phlogopite, synthetic mica, phlogopite, biotite, lithia mica, permiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, magnesium, silica, zeolite, barium sulfate, calcined sulfuric acid Calcium (burning gypsum), calcium phosphate, fluoroapatite, hydroxyapatite, ceramic powder, metallic soap (zinc myristate, calcium palmitate, aluminum stearate), inorganic powder such as boron nitride, polyamide resin powder (nylon powder), polyethylene powder Organic powder such as polymethylmethacrylate powder, polystyrene powder, copolymer resin powder of styrene and acrylic acid, benzoguanamine resin powder, polytetrafluoroethylene powder, silicone resin powder, cellulose powder, etc. End, titanium dioxide, zinc oxide,
Iron oxide (red iron oxide), iron iron oxide yellow oxide, carbon black, low-order titanium oxide mango violet, cobalt violet chromium oxide, chromium hydroxide, cobalt titanate, inorganic pigments such as ultramarine blue, dark blue, titanium oxide coated mica, oxidation Titanium coated bismuth oxychloride, titanium oxide coated talc, colored titanium oxide coated mica, bismuth oxychloride, pearl pigments such as fish scale foil, aluminum powder, metal powder pigments such as copper powder, red No. 201, red No. 202, red 204
No., Red 205, Red 220, Red 226, Red 228, Red 405, Orange 203, Orange 204
No. 205, Yellow 205, Yellow 401, and Blue 404
Red 3, Red 104, Red 106, Red 227
Red, No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 2
No. 03, Green No. 3 and Blue No. 1 such as zirconium, organic pigments such as barium or aluminum lake, and natural pigments such as chlorophyll and β-caroline.

Of these, zinc oxide is preferably used in combination from the viewpoint of mold resistance. In that case, since the hydrophilicity of the entire cosmetic composition increases as the amount of zinc oxide compounded increases, it is not preferable for the antifungal property. Therefore, it is preferably about 1 to 8% by weight in the total amount of the cosmetic of the present invention. If it is less than 1% by weight, it is insufficient from the viewpoint of antifungal property.

The powder is preferably a hydrophobic powder from the viewpoint of antifungal property. In that case, there is a method of using hydrophilic powder in addition to the method of using hydrophilic powder, in addition to using hydrophobic powder. As the method of hydrophobizing treatment, any method may be used, generally, silicone treatment, metal soap treatment, cationic activator treatment, laurouridine treatment, Teflon treatment,
Examples include wax treatment and fluorine-based oil treatment. Among these, a method in which powder and metal hydroxide are mixed and ground and uniformly bonded to the powder surface, and then methyl hydrogen polysiloxane oil is uniformly crosslinked and polymerized on the powder surface by a mechanochemical reaction (special JP-A-56-43264); a method in which a powder and an acidic substance are mixed and an organohydrogenpolysiloxane is reacted on the surface of the powder to carry out cross-linking polymerization (JP-A-60-1).
No. 63973), but in particular, a method of utilizing the activity of the powder surface to polymerize a cyclic organosiloxane on the powder surface at a low temperature of 100 ° C. or lower by a gas phase reaction (Japanese Patent Publication No.
-54380); a method of adding a pendant group such as glycerol monoallyl ether to the Si-H portion of the surface silicone polymer after the above method (Japanese Patent Publication No. 1-54).
No. 381) is preferable. From the viewpoint of antifungal properties, it is desirable to mix the hydrophobic powder as much as possible, and it is particularly preferable to mix 70% by weight or more of the powder part.

The press-type powdery cosmetic of the present invention may contain components usually used in cosmetics, quasi-drugs, etc. within a range that does not impair the effects of the present invention. In addition to the oils and powders described above, for example, moisturizers, antioxidants, ultraviolet absorbers, fragrances, astringents, pH adjusters, sequestering agents, herbal medicines,
Vitamins, antiseptics, bactericides, resins, film agents, gelling agents, etc. In consideration of antifungal property, it is preferable not to add a hydrophilic component, but it is possible to add within a range that does not impair the effect.

[0016]

EFFECT OF THE INVENTION The solid cosmetic composition of the present invention has good smoothness and spreadability on the skin, strong impact resistance, and excellent antifungal property. Furthermore, when a hydrophobic powder is used as the powder, the antifungal property can be improved, and the quality as a cosmetic can be sufficiently guaranteed without adding a conventionally used antiseptic / antifungal agent.

[0017]

The present invention will be described in more detail with reference to examples. The present invention is not limited to this. All compounding amounts are weight%. Prior to the examples, the test method will be described.

<Impact resistance> The powder is press-molded in an inner plate with an Olsen hardness tester to a hardness of 35, placed in a cosmetic container, and repeatedly dropped on an iron plate from a height of 30 cm in the reverse position. Measure the number of times until is broken. 10 times or more ◎ 8 to 9 times ○ 5 to 7 times △ 4 times or less ×

<Mold-proofing property> Powder is molded in a medium dish, put in a petri dish lined with wet absorbent cotton, sprayed with mold, covered with a lid and allowed to stand in a thermostat at 25 ° C for 1 month. Determine the state of. The mold is not visible and the mycelia cannot be confirmed with a microscope. ◎ The mold is not visible and the mycelia can be confirmed with a microscope.
○ Some mold is visually recognized
△ Visually recognizable in a wide range of molds
×

<Usability (spreading)> A 20-level expert panel performed a 5-level evaluation. Very good spread 1 point Very bad 2 points Normal spread 3 points Good spread 4 points Very good spread 5 points The evaluation results are shown by the following symbols based on the average value of 20 persons. 4.5 to 5.0 ◎ 3.5 to less than 4.5 ○ 2.5 to less than 3.5 △ 1.5 to less than 2.5 × 1.0 to less than 1.5 × ×

Examples 1 to 4 and Comparative Examples 1 to 3 Powdery foundations were obtained according to the formulations shown in Table 1.

[0022]

[Table 1]

* 1: 100 parts of mica and 10 parts of tetrahydrotetramethylcyclotetrasiloxane were placed in separate containers and left in a desiccator at 80 ° C. After 72 hours, the mica was taken out and weighed to obtain 104 parts of the treated mica, and further left to stand in a dryer at 50 ° C. for 24 hours to obtain 101.5 parts of the treated mica. Similarly, the above mica was replaced with talc, iron oxide and titanium oxide to obtain 103 parts of treated talc, 104 parts of treated iron oxide and 101 parts of treated titanium oxide.

Comparative Examples 4 to 5 and Example 5 Powdery foundations were obtained according to the formulations shown in Table 2. Table 2
The silicone treatment inside is the same as in Table 1.

[0025]

[Table 2]

Examples 6 to 10 Powdery foundations were obtained according to the formulations shown in Table 3. * 1: The same as in Table 1 was used. * 2: 3 parts by weight of methylhydrogenpolysiloxane dissolved in 10 parts of toluene was added to 97 parts by weight of mica at room temperature, and the toluene was distilled off at 100 ° C.
Silicone treated mica was obtained by baking at 0 ° C. for 2 hours.

[0027]

[Table 3]

Examples 11 to 15 Powdery foundations were obtained according to the formulations shown in Table 4. * 1, * 2: The same as in Table 1 was used.

[0029]

[Table 4]

Example 16 Blushing (1) Hydrophobized talc 12.6 (2) Hydrophobized sericite 60 (3) Untreated talc 12.15 (4) Ultramarine 0.1 (5) Yellow iron oxide 0 1 (6) Red iron oxide 0.4 (7) Red 226 No. 0.4 (8) Titanium mica 3.0 (9) Squalane 3.0 (10) Methylphenylpolysiloxane n = 12,300cs 5.0 (11) Octyl methoxycinnamate 3.0 (12) Preservative 0.05 (13) Vitamin E 0.1 (14) Perfume 0.1 (Production method) (1) to (8) are mixed with a Henschel mixer, A mixture of (9) to (13) heated and dissolved was sprayed onto this, mixed and crushed, and (14) was further added and mixed, and then molded into an inner dish to obtain a blusher. The hydrophobizing treatment is the same as in Table 1, in which the silicone polymer is polymerized on the powder surface and then glycerol monoallyl ether is added. According to the above evaluation method, this product had impact resistance: ⊚, mold resistance; ⊚, usability (spread); ◯.

Example 17 Eyeshadow Talc 2.0 Sericite 40.0 Spherical silica (5 μm, 350 m ² / g) 19.55 Ultramarine blue 8.0 Yellow iron oxide 3.0 Black iron oxide 1.0 Methylphenylpolysiloxane n = 17,100 cs 5.0 Cetyl-2-ethylhexanoate 1.9 Sorbitan sesquioleate 0.8 Glycerin 0.5 Preservative 0.05 Perfume 0.2 In the same manner as in Example 16, eye shadow was obtained. . According to the above evaluation method, this product has impact resistance; ⊚, mold resistance; ⊚,
Usability (spreading): Good.

Example 18 Oily foundation (1) Talc 17.8 (2) Kaolin 15.0 (3) Titanium dioxide 15.0 (4) Red iron oxide 1.0 (5) Yellow iron oxide 3.0 (6) Black Iron oxide 0.2 (7) Solid paraffin 3.0 (8) Microcrystalline wax 6.0 (9) Beeswax 2.0 (10) Methylphenylpolysiloxane n = 12,300cs 33.6 (11) 2-hydroxy -4-Methoxybenzophenone 3.0 (12) Antioxidant 0.2 (13) Perfume 0.2 (Production Method) (7) to (12) were dissolved at 85 ° C. and sufficiently mixed and pulverized ( 1) to (6) are added with stirring. Next, it is ground and dispersed by a colloid mill. After adding a fragrance and degassing, pour into a medium plate at 70 ° C. and cool. This one had excellent adhesion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shigeyuki Ogawa, 1050 Shinba-cho, Kohoku-ku, Yokohama-shi, Kanagawa Inside Shiseido Research Center 1 (72) Hideyuki Gomei, 1050 Shinba-cho, Kohoku-ku, Yokohama-shi, Kanagawa Banchi Co., Ltd. Shiseido Research Center No. 1

Claims (3)

[Claims] 1. A solid cosmetic comprising 40 to 100% by weight of the total oil content of methylphenylpolysiloxane represented by the general formula 1. [Chemical 1] (The average n in the formula is 10 to 17.) 2. The solid cosmetic composition according to claim 1, wherein the amount of oil is 3 to 45% by weight based on the total amount of the cosmetic composition. 3. The solid cosmetic composition according to claim 1, wherein 70% by weight or more of the total amount of the powder is a hydrophobic powder.