JPH05262622A - Cosmetic - Google Patents

Abstract

PURPOSE:To provide a cosmetic having excellent covering power, adhesiveness, adsorptivity and miscibility, free from safety problem because of little stimulation to the skin, giving soft and smooth feeling to the skin and exhibiting excellent slipperiness and feeling. CONSTITUTION:The objective cosmetic contains (A) fine powder of spherical polyurethane having an average particle diameter of <=30mum (or containing 0-10wt.% of particles of 30-74m diameter and having an average particle diameter of <=25mum), preferably polyurethane powder having particle diameter range of 1-15mum and uniform particle size distribution and preferably further (B) pigments such as titanium oxide, zinc oxide, Pigment Blue 15 and talc or functional fillers such as ultraviolet absorber, antioxidant and humectant. The cosmetic exhibits the above effects such as excellent covering power to mask the spots, pimples, etc., on the skin surface, adsorptivity and adhesion to the skin, absorbability of sweat and secreted material and miscibility with other cosmetic base and has excellent slipperiness and feeling to the skin compared with conventional, cosmetics containing organic fine powder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic containing an organic fine powder, and more particularly to a cosmetic excellent in slipperiness and touch to the skin.

[0002]

2. Description of the Related Art Conventionally, inorganic powders such as titanium dioxide, zinc white, talc, kaolin, precipitated calcium carbonate, basic magnesium, etc., or nylon resin, crosslinked, have been used as cosmetics in the form of fine powder. Styrene resin,
Organic powders such as acrylic resin, cotton acetate, N-acyl lysine, and cellulose derivatives are known.

The performance required for these fine powders for cosmetics is (1) covering ability for hiding spots, freckles, etc. on the skin surface,
(2) Elongation when applied to the skin, slipperiness, feel, (3)
Adhesiveness to skin, adhesion, (4) No irritation to skin, (5) Absorption of sweat and secretions, (6) Mixability with other cosmetic bases, dispersion stability, ( 7) There are no safety issues.

[0004]

However, although inorganic powders such as titanium dioxide can provide good covering power and feel, they have high hydrophilicity and are difficult to mix with an oily base material.
In addition, organic powders such as nylon resin are excellent in slipperiness, safety, adhesiveness, and miscibility brought about by the microspherical shape, and have little irritation to the skin. There was a surface that was inferior in touch when applied.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an organic fine spherical powder-containing cosmetic composition which is excellent in slipperiness and feel to the skin.

[0006]

[Means for Solving the Problems] The cosmetic of the present invention comprises a spherical polyurethane fine powder having an average particle diameter of 30 μm or less as a means for solving the above problems.

More specifically, particles having an average particle size of 30 μm or less, or particles of 30 μm or more and 74 μm or less are 0 to 1
The spherical polyurethane fine powder is present in an amount of 0% by weight and has an average particle size of 25 μm or less, and more preferably contains spherical polyurethane fine powder having a particle size of 1 to 15 μm and a uniform particle size distribution.

The present invention will be described in detail below.

Polyurethane herein is a polymer obtained by reacting a compound having an isocyanate group with a group having an active hydrogen which reacts with the isocyanate compound, for example, a compound having a hydroxyl group, an amino group or a carboxyl group, It is highly elastic.

The polyurethane fine powder of the present invention can be obtained by various production methods, and the production method is not particularly limited. For example, it is described in Japanese Patent Application No. 2-314696 proposed by the present inventor. There is a method. In this production method, a polyisocyanate prepolymer alone or in a water containing a suspension stabilizer is added alone or polyurethane or polyurethane polyol is added thereto, and the stirring speed is adjusted to prepare a suspension having a target particle size. Then, the mixture is heated to start the reaction to produce spherical fine powder, and solid-liquid separation, washing and drying are performed to produce spherical polyurethane fine powder. Here, the particle size and particle size distribution of the spherical polyurethane fine powder can be adjusted by changing the amount, type, stirring speed, etc. of the suspension stabilizer. According to this production method, it is possible to easily control the particle size of the spherical polyurethane fine powder, and to obtain the desired spherical polyurethane fine powder efficiently, stably and with good reproducibility.

In addition to this, it can be manufactured by various known manufacturing methods, for example, US Pat. No. 3,527,772.
No. 9, JP-B-50-8116, JP-A-3-226.
The polyurethane fine powder used in the present invention can also be produced by the method disclosed in Japanese Patent Publication No. 6 or the like.

In the present invention, the average particle size is 30 μm.
The reason for defining the following is to solve the problems that if the particle size exceeds 30 μm, the foreign matter feeling and discomfort to the skin of the fine powder appear, and the adhesiveness to the skin and the covering power significantly decrease.

The spherical polyurethane fine powder containing pigment according to a second aspect of the present invention is one in which a pigment is contained in the polyurethane fine powder, and is produced by the same method as the spherical polyurethane fine powder. The pigment used here does not hinder the formation reaction of the spherical polyurethane fine powder, and if the produced pigment-containing spherical polyurethane fine powder is used as a cosmetic, it does not matter as long as it does not cause a safety problem. Any of inorganic materials can be used. For example, titanium oxide, zinc white, Pigment Blue 15 (phthalocyanine blue pigment), talc and the like can be used.

The spherical polyurethane fine powder containing a functional filler according to a third aspect of the present invention is one in which the spherical polyurethane fine powder contains a functional filler, and is produced by the same method as the spherical polyurethane fine powder. The functional filler used here is an ultraviolet absorber, an antioxidant, a moisturizing agent, or the like, which is a filler useful as a cosmetic,
It does not hinder the formation reaction of the spherical polyurethane fine powder, and when the produced pigment-containing spherical polyurethane fine powder is used as a cosmetic, as long as there is no problem in safety,
Both organic and inorganic materials can be used.
For example, pentaerythrityl-tetrakis [3- (3,5
-Ditertiarybutyl 4-hydroxyphenyl) propionate], bis (2,2,6,6 tetramethyl-4
-Piperidyl) sebacate, collagen, chitosan, finely divided titanium oxide, finely divided iron oxide and the like can be used.

[0015]

EXAMPLES Examples of the present invention will be described below.
The present invention is not limited to the examples below.

(Example 1) A separable flask equipped with a 2 L stirrer was charged with 965 g of water.
A dispersion medium was prepared by dissolving 35 g of 0SH-100 (manufactured by Shin-Etsu Chemical Co., Ltd., methylcellulose).

On the other hand, ADEKA POLYETHER G-700 was placed in a 2 L autoclave which had been sufficiently replaced with nitrogen gas and dried.
(Hydroxyl value 225 mg / KOHg; Asahi Denka Kogyo KK, glycerin PO adduct) 748 g and hexamethylene diisocyanate (hereinafter referred to as HMDI) 1008 g
Was charged, and the atmosphere was sufficiently replaced with nitrogen gas and then sealed, and the mixture was stirred at 120 ° C. for 20 hours, mixed and reacted. Then, after removing unreacted HMDI under reduced pressure,
Toluene is added to produce a non-volatile content of 90% by weight (hereinafter,
Synthetic product (I) was obtained). It had an isocyanate content of 8.73% and a viscosity of 1500 cps.

Under stirring at 600 rpm, a suspension prepared by adding a solution prepared by diluting 280 g of the above compound (I) with 120 g of toluene was added to the above dispersion medium. The temperature of this suspension was raised to 60 ° C. under continuous stirring, reacted for 1.5 hours, cooled to room temperature, then solid-liquid separated and thoroughly washed with water, then 70 ° C. Dried for 20 hours at
A spherical urethane fine powder having an average particle diameter of 5 μm was obtained.

A white powder was prepared using the spherical polyurethane fine powder thus obtained. Spherical polyurethane fine powder (average particle diameter 5 μm) 40 parts by weight Talc 40 Kaolin 11 Magnesium stearate 6 Perfume 1 Dye 2 Using a ball mill, various powder raw materials were mixed and pulverized based on the above mixing ratio to prepare a white powder. The powdery white powder obtained here had excellent adsorptivity to the skin, had good elongation, and had no feeling of foreign matter on the skin and was soft and smooth.

Example 2 A pressed powder was prepared using the spherical polyurethane fine powder obtained in the same manner as in Example 1. Spherical polyurethane fine powder (average particle size 5 μm) 45 parts by weight Talc 25 Kaolin 10 Zinc stearate 5 Tragant gum aqueous solution (binder) 7 Sodium pyrrolidonecarboxylate (binder) 3 Fragrance 1 Dye 2 Using a ball mill, the above blending ratio Based on this, various powder raw materials were mixed and pulverized to prepare a white powder. Then, a tragacanth gum aqueous solution and a sodium pyrrolidonecarboxylate were added as a binder, and press molding was performed to obtain a pressed powder. The pressed powder obtained here was easy to mold, did not easily crack, and had a soft and smooth feel on the skin without feeling foreign matter.

(Example 3) A separable flask equipped with a 2 L stirrer was charged with 965 g of water.
A dispersion medium was prepared by dissolving 35 g of 0SH-100 (manufactured by Shin-Etsu Chemical Co., Ltd., methylcellulose). 600r
Under pm stirring, a mixed solution of 280 g of Compound (I), 92 g of toluene, and 60 g of Resino Color UD-522A (white pigment manufactured by Resino Color Industry Co., Ltd.) was added to this dispersion medium to prepare a suspension. The temperature of the suspension was raised to 60 ° C. under continuous stirring, reacted for 1.5 hours, cooled to room temperature, then solid-liquid separated, thoroughly washed with water, and dried for 20 hours. A spherical urethane fine powder containing a pigment having an average particle diameter of 5 μm was obtained.

The pigment-containing spherical polyurethane fine powder thus obtained was used to prepare a kneading white powder. Pigment-containing spherical polyurethane fine powder (average particle diameter 5 μm) 55 parts by weight Glycerin 10 Sodium pyrrolidonecarboxylate 3 Purified water 29 Perfume 1 Dye 2 Using an emulsifier, kneading various raw materials based on the above mixing ratio, and kneading white powder Prepared. The kneaded white powder obtained here had excellent spreadability and covering power on the skin and was soft and smooth with no feeling of foreign matter on the skin.

Example 4 A separable flask equipped with a 2 L stirrer was charged with 970 g of water.
A dispersion medium was prepared by dissolving 30 g of 0SH-100 (manufactured by Shin-Etsu Chemical Co., Ltd., methylcellulose). 600r
Under pm stirring, a mixed solution of 280 g of Synthetic compound (I) (92 g) of toluene and 60 g of Resinocolor UD-522A (White pigment manufactured by Resinocolor Industry Co., Ltd.) was added to the dispersion medium to prepare a suspension. The temperature of the suspension was raised to 60 ° C. with continuous stirring, reacted for 1.5 hours, cooled to room temperature, and then solid-liquid separated and thoroughly washed with water.
After drying for 20 hours, pigment-containing spherical urethane fine powder having an average particle diameter of 15 μm was obtained.

A body powder was prepared using the pigment-containing spherical polyurethane fine powder thus obtained. Pigment-containing spherical polyurethane fine powder (average particle size 15 μm) 44 parts by weight Sodium bicarbonate 20 Kaolin 29 Zinc stearate 4 Mink oil 2 Perfume 1 Using a blender, sufficiently mix and mix various raw materials based on the above blending ratio After that, oil and a fragrance were added with further stirring to prepare a body powder. The body powder obtained here had good spreadability, adhesiveness and adsorptivity to the skin, and the skin was soft and smooth without feeling of foreign matter.

(Embodiment 5) A separable flask equipped with a 2 L stirrer was charged with 970 g of water.
A dispersion medium was prepared by dissolving 30 g of 0SH-100 (manufactured by Shin-Etsu Chemical Co., Ltd., methylcellulose). 600r
A solution prepared by diluting 280 g of Compound (I) with 120 g of toluene was added to this dispersion medium under pm stirring to prepare a suspension. The temperature of the suspension was raised to 60 ° C. with continuous stirring, reacted for 1.5 hours, cooled to room temperature, then solid-liquid separated, thoroughly washed with water, and dried for 20 hours. ,
Spherical urethane fine powder having an average particle diameter of 15 μm was obtained.

A lipstick was prepared using the spherical polyurethane fine powder thus obtained. Spherical polyurethane fine powder (average particle size 15 μm) 20 parts by weight Castor oil 30 Carnauba wax 6 Beeswax 11 Lanolin 20 Oleyl alcohol 10 Dye 2 Perfume 1 Using a mixer, spherical polyurethane fine powder, dye and fragrance based on the above blending ratio Were thoroughly stirred and mixed, castor oil and oleyl alcohol were further added, and mixed and stirred. Put this mixture in melted oil, wax,
After the dispersion, it was poured into a molding machine and cooled to prepare a lipstick. The lipstick obtained here had good spreadability and adhesion to the lips, and the touch was soft and smooth without feeling of foreign matter.

(Example 6) A separable flask equipped with a 2 L stirrer was charged with 970 g of water.
A dispersion medium was prepared by dissolving 30 g of 0SH-100 (manufactured by Shin-Etsu Chemical Co., Ltd., methylcellulose). 600r
A solution of 280 g of Compound (I), 120 g of toluene, and 5.6 g of Sanol LS770 (manufactured by Sankyo Co., Ltd., UV absorber) was added to this dispersion medium under pm stirring to prepare a suspension. With the stirring continued, add 60
After heating to ℃ for 1.5 hours, cooling to room temperature, solid-liquid separation, washing well with water, drying for 20 hours, UV absorber-containing spherical urethane having an average particle diameter of 15 μm. A fine powder was obtained.

An eye shadow was prepared using the ultraviolet absorbent-containing spherical polyurethane fine powder thus obtained. Ultraviolet absorbent-containing spherical polyurethane fine powder (average particle diameter 15 μm) 10 parts by weight Talc 1 Pigment 12 Mica 18 White petrolatum 12 Lanolin derivative 5 Microcrystalline wax 15 Squalane 2 Liquid paraffin 27 Using an emulsifier, based on the above blending ratio, Various raw materials were sufficiently kneaded to prepare an eye shadow. The eye shadow obtained here was excellent in the spreadability and adsorptivity to the skin, and the skin was soft and smooth without feeling of foreign matter.

[0029]

As described above, the cosmetic of the present invention contains the polyurethane resin in the form of spherical fine powder having an average particle diameter of 30 μm or less. Therefore, by blending the spherical polyurethane fine powder having high elasticity, a cosmetic having excellent covering property, adhesive property, adsorptive property, and mixing property, hardly causing skin irritation, and having no safety problem can be obtained. .. In particular, when used on the skin, the feel is soft and smooth, and the slipperiness and feel can be improved as compared with the conventional organic microsphere-containing powder-containing cosmetics.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location C08L 75/04 NFX 8620-4J NFY 8620-4J

Claims (3)

[Claims] 1. A cosmetic comprising a spherical polyurethane fine powder having an average particle diameter of 30 μm or less. 2. The cosmetic according to claim 1, wherein the spherical polyurethane fine powder is a pigment-containing spherical polyurethane fine powder. 3. The cosmetic according to claim 1, wherein the spherical polyurethane fine powder is a functional filler-containing spherical polyurethane fine powder.