JPH07126125A - Make-up cosmetic - Google Patents

Abstract

PURPOSE:To obtain a make-up cosmetic which has a slippery feeling, light extendibility, high adhesion feeling in use and good feeling on application. CONSTITUTION:The make-up cosmetic includes spherical fine powder of a shape memory resin, preferably shape memory polyurethane beads which have the glass transition point lower than the skin surface temperature, 4 or more ratio of elasticity at the temperature higher than the glass transition point to that at lower than the point, and 0.3 to 0.9 loss tangent (tan delta) near the skin surface temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a makeup cosmetic composition which is easy to apply makeup and has an excellent feeling of use.

[0002]

2. Description of the Related Art Powders have been conventionally blended in makeup cosmetics such as foundations and base lotions for the purpose of improving weather resistance and eliminating sticky feeling.
Recently, in order to improve the adhesion of cosmetics to the skin and make-up lasting, it has been attempted to make the powder blended into fine particles and flakes, and porous powders have been used. Treatment has been proposed. As the surface treatment method, a method of surface treatment with a fluororesin (see JP-B-61-48803), a method of surface treatment with zinc oxide or zinc carbonate fine particles (see JP-A-61-257909), and titanium dioxide A method of coating with a metal powder such as JP-A-61-2579
No. 08 publication) is proposed.

[0003]

By the way, makeup cosmetics are required to have a feeling of slipping on the skin, lightness of elongation and the like when applying makeup, and thereafter, a feeling of close contact with human skin and breathability. , Good absorbability, oil replenishment, etc. are required, but powders mixed in cosmetics have little change in physical properties such as elastic modulus during makeup and during use. When the powder is hardened to improve the feeling, it is perceived as an unpleasant sensation during use, and it is difficult to simultaneously satisfy the above demands.

Therefore, the present invention is intended to provide a makeup cosmetic having a slippery feel at the time of makeup, a light stretch, a close contact feel at the time of use, and a good feel at use.

[0005]

According to the present invention, a spherical fine powder made of a shape memory resin having a glass transition point lower than the skin surface temperature and undergoing a glass transition at the skin surface temperature to change the elastic modulus is blended. Is a makeup cosmetics.

The shape memory resin suitable for makeup cosmetics of the present invention has an elastic modulus ratio of 4 before and after the glass transition point.
The above is the loss tangent tan near the skin surface temperature
It is preferable to use a shape memory resin having δ in the range of 0.3 to 0.9, particularly polyurethane. The shape memory resin is preferably blended in the range of 0.01 to 80% by weight, particularly 5 to 50% by weight.

[0007]

The spherical fine powder made of the shape memory resin in the makeup cosmetic of the present invention has a high elastic modulus in the glass region at a temperature lower than the glass transition point, so that the cosmetic is applied onto the skin. Sometimes it slips well and it has a light stretch,
The makeup can be applied very smoothly. In addition, when applied on the skin, the spherical fine powder has a skin temperature higher than the glass transition point, and thus exhibits a low elastic modulus in the rubber region, which is close to the skin feel and improves the adhesion and usability. Contribute to.

In order to ensure the shape memory property of the fine powder, it is preferable to set the glass transition point of the resin used to be lower than the skin surface temperature. Further, in order to secure the above-mentioned feeling of use, it is preferable to set the elastic modulus ratio before and after the glass transition point to 4 or more, particularly 4 to 200. When the elastic modulus ratio is less than 4, it is not possible to sufficiently secure a slippery feeling and a close feeling suitable for makeup and use.

The loss tangent tan δ is a physical property defined as the ratio E ″ / E ′ of the loss elastic modulus E ″ and the storage elastic modulus E ′,
The tan δ of human skin is about 0.5. Therefore, the loss tangent tan δ in the vicinity of the skin surface temperature of the shape-memory resin fine powder blended in the cosmetic of the present invention is 0.3.
By setting it in the range of 0.9, preferably 0.4 to 0.8, it plays a great role in eliminating discomfort after application.

Polyurethane is suitable as the resin having the above-mentioned shape memory property, elastic memory property and loss tangent tan δ. The polyurethane beads used in the present invention are the polyisocyanate prepolymer alone in water containing a suspension stabilizer, or polyurethane or polyurethane prepolymer polyol is added to the polyisocyanate prepolymer, and the stirring speed is adjusted to obtain the target particle size. After obtaining the suspension described above, the reaction can be started by heating to produce polyurethane beads, which can be produced by solid-liquid separation, washing and drying. The preferred average particle size of the polyurethane beads is 5 to
It is in the range of 15 μm.

[0011]

【Example】

[Production Example 1 of polyurethane beads] 813 g of polycaprolactone diol and 444 g of isophorone diisocyanate were charged into a 2 liter autoclave, which had been sufficiently replaced with nitrogen gas and dried, and the upper gas was replaced with nitrogen gas and then sealed. Then, the mixture was reacted with stirring at 120 ° C. for 20 hours. After completion of the reaction, the mixture was cooled to 80 ° C., 539 g of toluene was additionally charged, and the mixture was stirred and mixed until the mixture became uniform, and then cooled to obtain a polyisocyanate prepolymer (I). The isocyanate content of this prepolymer was 4.62% and the viscosity was 230 cps (25 ° C).
Met.

Further, the autoclave having a size of 2 liters, which had been sufficiently replaced with nitrogen gas and dried, was charged with 3 methyl 1 ,.
520 g of a polyester diol of 5 pentadiol and adipic acid and 54 g of isophorone diisocyanate were charged and reacted to obtain a polyurethane polee polymer polyol (II) as a toluene solution containing a nonvolatile content of 70 wt%. The hydroxyl group content of this polyol was 0.37%, and the viscosity was 570 cps (25 ° C.).

Next, a separable flask equipped with a 2-liter stirrer was charged with 980 g of water, and 20 ml of methyl cellulose was added.
Dissolve 0 g to prepare a dispersion medium. 600r of this dispersion medium
While stirring at pm, 200 g of the above polyisocyanate prepolymer (I) and 200 g of polyurethane polypolymer polyol (II) were uniformly stirred and mixed, and the suspension was mixed with 60
The temperature is raised to 0 ° C. to react for 3 hours, then cooled to 52 ° C., 7 g of cellulolytic enzyme is added, the mixture is stirred for 30 minutes, then heated to 100 ° C., and toluene is azeotropically separated. Then, it was cooled to room temperature, solid-liquid separated, washed thoroughly with water, and dried under reduced pressure at 40 ° C. for 30 hours to obtain an average particle size of 7
Polyurethane beads of 10 μm were obtained.

With respect to the obtained polyurethane beads (hereinafter referred to as Production Example 1), the loss elastic modulus E ″ and the storage elastic modulus E ′ were measured by a compression vibration method using a dynamic viscoelasticity measuring device (RSAII manufactured by Rheometrics). Then, tan δ (= E ”/
E ′) was calculated and is shown in Table 1. Incidentally, the corresponding values of the powders conventionally blended in cosmetics, specifically, talc, mica, sericite, nylon powder, silicone powder, and polystyrene powder are shown for comparison.

[0015]

[Table 1]

Example 1 (1) Stearic acid 2.4 wt% (2) Propylene glycol monostearate 2.0 wt% (3) Behenyl alcohol 0.2 wt% (4) Liquid lanolin 2.0 wt% (5) Liquid paraffin 8.0 wt% (6) Propyl paraoxybenzoate (7) Purified water 64.5 wt% (8) Carboxymethylcellulose Na 0.2 wt% (9) Bentonite 0.5 wt% (10) ) Glycerin 4.0% by weight (11) Triethanolamine 1.1% by weight (12) Methyl paraoxybenzoate (13) Titanium oxide 8.0% by weight (14) Color pigment (15) Polyurethane beads (Production example) 1) 5.0 wt% (16) Fragrance Suitable amount The sized particles obtained by mixing and stirring the above components (13) to (15) in advance,
Components (7) to (12) were added to a liquid which was heated and mixed and dissolved, and the mixture was stirred to make it uniform. Separately, components (1) to (6) which were heated and mixed and dissolved were added and emulsified. Then, it cooled, added the component (16), stirred and homogenized, and obtained the emulsion base. When the obtained foundation was used in a room at 18 ° C., it had a good slippery feel during application, excellent adhesion and usability after application, and no discomfort.

[Example 2] (1) Polyurethane beads (Production Example 1) 10.0 wt% (2) Mica titanium 20.0 wt% (3) Talc 20.0 wt% (4) Sericite 15.0 % By weight (5) Magnesium stearate 2.0% by weight (6) Color pigment suitable amount (7) Liquid paraffin 8.0% by weight (8) Paraffin wax 1.5% by weight (9) Preservative suitable amount Above ingredients (1 ) ~ (6) in advance by mixing and stirring the sized,
Ingredients (7) to (9) were added to a liquid which was mixed by heating and dissolved, and the mixture was stirred to make it uniform, which was then filled in a gold plate and compression-molded to obtain a solid powdery eye shadow. 1 for the obtained eye shadow
When it was applied with a brush in a room at 8 ° C., the elongation during application was light, and the adhesion and use feeling after application were excellent and no discomfort was felt.

[Example 3] (1) Polyurethane beads (Production Example 2) 50.0 wt% (2) Talc 40.0 wt% (3) Precipitated calcium carbonate 5.0 wt% (4) Magnesium stearate 4 0.0% by weight (5) Coloring pigment Appropriate amount (6) Preservative Appropriate amount (7) Perfume Appropriate amount The above-mentioned components (1) to (6) are mixed and stirred to obtain a sized powder,
Ingredient (7) was added, and the mixture was stirred to make it uniform, and this was filled in a container to obtain a powder white powder. The obtained powder white powder is placed at 18 ℃
When applied in the room, there is a light extension during application,
The adhesiveness and the feeling of use after application were excellent, and no discomfort was felt.

[0019]

EFFECTS OF THE INVENTION The present invention adopts the above-mentioned constitution, and the spherical fine powder of the shape memory resin is blended in the cosmetic, and its glass transition point, the elastic modulus ratio before and after the glass transition point and the loss tangent t.
By selecting an appropriate value of an δ, there is a feeling of slippage and light elongation when applying makeup cosmetics, and
It has become possible to provide a makeup cosmetic having excellent adhesion and application feeling after application.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shunichi Hayashi No. 1 Takamichi, Iwazuka-cho, Nakamura-ku, Aichi Prefecture Nagoya, Mitsubishi Heavy Industries, Ltd. Nagoya Research Institute (72) Inventor Masashi Fujii 112-1 Okada-cho, Yokaichi-shi, Shiga Prefecture Noevir Co., Ltd. (72) Inventor Yoshiki Shiogai 112-1, Okada-cho, Yokaichi-shi, Shiga Noevia Co., Ltd.

Claims (4)

[Claims] 1. The glass transition point is lower than the skin surface temperature,
A make-up cosmetic composition comprising a spherical fine powder made of a shape memory resin, which changes its elasticity by glass transition at the skin surface temperature. 2. The elastic modulus ratio before and after the glass transition point is 4
The above is the loss tangent tan near the skin surface temperature
The makeup cosmetic according to claim 1, wherein a shape-memory resin having δ in the range of 0.3 to 0.9 is used. 3. A makeup cosmetic, wherein the shape-memory resin according to claim 2 is polyurethane. 4. The shape memory resin is 0.01 to 80% by weight.
The make-up cosmetics according to any one of claims 1 to 3, wherein the make-up cosmetics are blended.