JPH02240010A - Powder cosmetic - Google Patents

Abstract

PURPOSE:To obtain a powder cosmetic having water repellency, hardly causing make-up disorder, providing finish of fine texture, containing make-up powder subjected to surface treatment with a dialkyl phosphate and mica classified into specific particle size distribution. CONSTITUTION:A powder cosmetic containing (A) 10-80wt.%, preferably 20-70wt.% make-up powder subjected to surface treatment with a compound shown by the formula (R<1> and R<2> are 12-22C alkyl or 12-22C alkenyl) and (B) 10-80wt.%, preferably 20-70wt.% mica having 4-20mum volume accumulated average particle diameter and comprising <=5 volume % particles having <=2mum particle diameter and <=5 volume % particles having >=48mum particle diameter, especially having <=5-15mum average particle diameter and comprising <=1 volume % particles having <=2mum particle diameter and <=1 volume % particles having >=32mum particle diameter. The cosmetic has light spread on the skin and improves straining feeling, rough feeling and wet feeling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cosmetic containing a cosmetic powder surface-treated with an alkyl phosphate and mica classified into a specific particle size distribution. More specifically, by blending these ingredients, it has water repellency, prevents makeup from coming off, has good adhesion to the skin, spreads easily on the skin, and reduces the feeling of squeaking, roughness, and powderiness. It relates to a cosmetic that improves the feeling of moisture and gives a fine finish.

[Prior Art] Cosmetics containing cosmetic powders include makeup cosmetics such as foundation, white powder, blusher, eye shadow, and eyebrow, and body cosmetics such as body powder and baby powder. ing. Cosmetic powders used in these cosmetics are generally classified into three types: extender pigments, coloring pigments, and composite pigments thereof. Among these powders, extender pigments and composite pigments of extender pigments and color pigments (hereinafter simply referred to as composite pigments) are blended in relatively large quantities, and therefore, these pigments are used as powders. Performance greatly affects the cosmetic performance of each cosmetic.

Cosmetic performance issues in cosmetics containing cosmetic powders include spread on the skin, smoothness, good adhesion, lack of squeakiness, roughness and powderiness, and makeup performance. In the case of make-up cosmetics, there is an additional requirement that the make-up does not come off.

Conventionally, in order to improve the performance of these cosmetics, when cosmetic powders that have been surface-treated with alkyl phosphate are added to cosmetics, they have strong water repellency and no dry feeling, resulting in improved adhesion on the skin, It has been found that the moist feeling is significantly improved and the shapeability during press molding is also good (Japanese Patent Application Laid-open No. 60-1163808).

[Problems to be Solved by the Invention] However, although cosmetics containing cosmetic powders surface-treated with alkyl phosphates have strong water repellency and excellent adhesion on the skin, they do not adhere well to the skin. It had the disadvantage of being difficult to stretch at the top. In addition, there was some squeakiness due to the extender pigments, which are other compounded ingredients, especially the microparticles of Myroku, a roughness due to the coarse particles, and some dustiness, and the results were not completely satisfactory.

[Means for Solving the Problems] In view of the above circumstances, the present inventors conducted extensive research in order to obtain powder cosmetics that do not have the above-mentioned drawbacks and have excellent cosmetic performance, and found that dialkyl In addition to the cosmetic powder that has been surface-treated with (or dialkenyl) phosphate, it also contains fine particles and coarse particles, which have a wide range of particle size distribution, usually up to 200 μm (60 mesh), which have been cut by classification. The material is water repellent, prevents makeup from coming off, has excellent adhesion to the skin, spreads easily on the skin, does not feel squeaky, rough, or powdery, and improves the moisturizing feeling. It has been found that a fine finish can be obtained.

That is, the present invention comprises the following two components (A) and (B) (A)
Dialkyl (or dialkenyl) represented by the following general formula (1) O ) 10 to 80% by weight of powder for cosmetics surface-treated with phosphate (B) Volume cumulative average particle size is 4 to 20 μm, particle size 2
The object of the present invention is to provide a powder cosmetic containing 10 to 80% by weight of mica, in which the particles having a diameter of 10 μm or less and the particles having a diameter of 48 μm or more are each 5% by volume or less.

As the powder for cosmetics used in the present invention, any known powder can be used, such as inorganic extender pigments such as talc, sericite, myriki, and kaolin; nylon,
Organic pigments such as polyethylene and silk powder; Inorganic colorants such as titanium oxide, zinc oxide, ultramarine blue, chromium oxide, and iron oxide; Organic colorants such as organic tar pigments and lake; and mica titanium, iron oxide coated mica, etc. Examples include composite pigments. These can be used alone or in combination of two or more. Among these powders for cosmetics, when the cosmetics are make-up cosmetics, body cosmetics, etc.
Inorganic powders such as kaolin, titanium oxide, and iron oxide coated mica are preferred.

The powder cosmetic of the present invention is prepared by surface-treating the cosmetic powder with dialkyl (dialkenyl) phosphite l-(1) in advance and then mixing it with other ingredients. For example dialkyl (dialkenyl) phosphate (i
) is heated and dissolved in an organic solvent such as benzene, toluene, acetone, etc., a powder for cosmetics is added thereto, and after stirring, the solvent is distilled off to dissolve dialkyl (dialkenyl) phosphate (1) on the powder for cosmetics. ) is preferably mixed with other ingredients. After coating, the powder may be baked at a temperature equal to or higher than the melting point of the dialkyl (dialkenyl) phosphate (I) in order to blend the powder well with the dialkyl (dialkenyl) phosphate (1). Further, as a pretreatment for this coating, the water repellency after coating is further increased by baking the cosmetic powder at 110° C. under reduced pressure for about 30 minutes to 80 hours and drying the powder. In these coating treatments, two or more kinds of cosmetic powders can be mixed and used simultaneously. In addition, silicones other than dialkyl (dialkenyl) phosphate (I), higher fatty acids, higher alcohols, esters,
It may be simultaneously treated with other known coating agents such as wax. In the present invention, the amount of dialkyl (dialkenyl) phosphate (1) used varies depending on the type, but is 0.1 to 50% by weight (hereinafter simply expressed as %) of the powder for cosmetics, particularly 2 to 20%. is preferred. If the amount of dialkyl (dialkenyl) phosphate (I) is too small, the water repellency will be insufficient, and if it is too large, the inherent good spreadability of the extender pigment may be impaired.

In the present invention, the amount of the cosmetic powder surface-treated with alkyl phosphate (I) is 10 to 80% by weight of the powder cosmetic, depending on the type of the surface-treated cosmetic powder. (hereinafter simply expressed in %), particularly preferably 20 to 70%.

Furthermore, the mica used in the present invention has an average particle size of 4 to 20
μm, and particles with a particle size of 2 μm or less and particles with a particle size of 48 μm or more are each 5% by volume or less, but in particular, the average particle size is 5 to 15 μm, and the particles with a particle size of 2 μm or less and 32 μm or more are It is preferable that each content is 1% by volume or less.

Such mica having a specific particle size distribution is produced by classification according to a conventional method such as a wet sieve, a wet centrifuge, an air classifier, or a combination thereof.

The blending amount of the above classification force is 19 to 80% of powder cosmetics.
, particularly preferably 20 to 70%.

The cosmetics of the present invention can be in the form of makeup cosmetics such as foundation, blusher, eye shadow, eyebrow, etc.; no-body cosmetics such as body powder, baby powder, etc.

When preparing these, 0 to 20% of oils such as higher fatty acids, higher alcohols, waxes, esters, hydrocarbons, and silicones can be added as optional ingredients, and preservatives and antioxidants can be added as necessary. Agents, fragrances, astringents, etc. can also be added.

The thus obtained powder cosmetic of the present invention contains dialkyl (
Cosmetic powder surface-treated with (alkenyl) phosphate imparts water repellency, and the classified properties eliminate squeak, roughness, and powderiness. Therefore, the powdered υ1tl of the present invention is perfect for skin! Elongation at ・,
It has an excellent moisturizing and smooth feeling, and is not only resistant to sweat and water, but also easy to press mold and prevent makeup from coming off easily when used for foundation, eye shadow, breast powder-like makeup t'+, such as almost red. It is an excellent cosmetic that has the following advantages.

[Examples] The present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.

Production Examples 1-4 1,000 g of commercially available mica was used in a wet cyclone, a wet sieve, and a wet centrifuge, and the particle size distribution shown in Table 1 was obtained by changing the mesh of the sieve and the rotation speed of the wet centrifuge. Classified mica 1 to 4 having the following were prepared.

The particle size distribution was determined by a laser diffraction method using an SK laser micron sizer manufactured by Seishin Enterprises, and the average particle size was determined as a volume cumulative distribution average.

Production Example 5 0.5 g of dicetyl phosphoric acid and 100 ynl of hexane! was placed in a 300 mQ eggplant flask and stirred at 50°C for about 20 minutes. 10 g of sericite was added to this, and the eggplant flask was rotated for about 30 minutes without suction using a rotary evaporator. Next, hexane was distilled off at 60°C under water aspirator suction, and the resulting powder was heated at 50°C.
After drying under reduced pressure overnight, hexane was completely removed to obtain dicetyl phosphate-treated sericite.

Example 1 - Talc - Classified mica 1 to 4 - Dicetyl phosphate treated sericite obtained in Production Example 5 - Titanium oxide - Red iron oxide - Yellow iron oxide - Black oxide - Liquid paraffin - Beeswax - Preservative - Fragrance Residual amount of cracking 0.8 2.5 0.1 0.1 0.05 Pulverize and mix the above components ① to ■, transfer to a Henschel mixer, and add the mixture of components ① to 0 mixed and dissolved at 80°C to homogenize. mixed with. Ingredient (1) was added to this, mixed, and then ground again and passed through a sieve. This was compression molded into a metal plate to obtain powder foundations 1 to 4.

Takumi j As described above, the feeling of use and relative friction coefficient of the four types of powder foundations obtained in Section 7 were measured.

The feeling of use was evaluated by 10 expert panelists in terms of the absence of squeaking, roughness, and powderiness, as well as adhesion to the skin and spreadability on the skin, using the following criteria.

O: 8 or more people judged it to be good Δ: 7 to 5 people judged it to be good was measured, and the ratio to the friction coefficient of freeze-dried pork skin itself was defined as the relative friction coefficient.

For measurement, Shinto Kagakusha's surface quality measuring machine Heidon 14 was used.
A mold was used. The results are shown in Table 2.

Table 2 Example 2 Brest bar missing: Set 1 y → 1 ■ Talc ■ Classified mica 2 ■ Remaining amount of dicetyl phosphate treated sericite obtained in Production Example 5 ■ Titanium oxide 05 ■ Red iron oxide 0.1 ■ Yellow iron oxide 01 ■Black iron oxide
0. Ol■Liquid paraffin 8■Beeswax
20 preservatives
010 fragrance
005L BuI Nost powder was obtained in the same manner as in Example 1 using the above composition.

Example 3 Powder eyeshadow: 1 yen x engineering ■ Dicetyl phosphate treated sericite obtained in Production Example 5 Remaining amount ■ Classified mica 1 30 ■ Nylon powder 1 o ■ Red iron
0.4 ■ Yellow iron oxide
2.0■Black iron oxide
0.02■Liquid paraffin
8■ Beeswax
2■Preservative 0
,10 fragrance 0.0
The above components (1) to (2) were pulverized and mixed and transferred to a Henschel mixer, and a mixture of components (1) to (4) mixed and dissolved at 80 DEG C. was added thereto and mixed uniformly. After adding and mixing component 0, the mixture was ground again and passed through a sieve. This was compression molded into a metal plate to obtain a powder eyeshadow.

Example 4 Cheeks: Shinji Tsuzuru ■ Talc Remaining amount ■ Dicetyl phosphate-treated sericite obtained in Production Example 5 40 ■ Classified mica 215 ■ Red No. 202 2 ■ Liquid paraffin 8 ■ Beeswax
2 ■ Preservatives
0.1■Fragrance
0.05 Nezukyo The above components (1) to (2) were pulverized and mixed and transferred to a Henschel mixer, and a mixture of components (1) to (4) mixed and dissolved at 80°C was added thereto and mixed uniformly. Ingredient (1) was added to this, mixed, and then ground again and passed through a sieve. This was compression-molded into a metal plate to obtain a blush.

Example 5 Body powder: Beniichi C Kai and ■ Dicetyl phosphate-treated sericite obtained in Production Example 5 Remaining amount ■ Classified mica 230 ■ Nylon powder 5 ■ Anti-inflammatory agent 0, 1 ■ Preservative
0.1■Fragrance
0.05k The above components (1) to (2) were mixed uniformly using a Henschel mixer to obtain a body powder.

that's all

Claims (1)

[Claims] (1) The following two components (A) and (B) (A) The following general formula (I) ▲There are mathematical formulas, chemical formulas, tables, etc.▼(I) (In the formula, R^1 and R^2 are carbon 10 to 80% by weight of cosmetic powder surface-treated with dialkyl (or dialkenyl) phosphate represented by (representing an alkyl group or alkenyl group of number 12 to 22) (B) Volume cumulative average particle size of 4 to 20 μm Yes, particle size 2
A powder cosmetic containing 10 to 80% by weight of mica, in which the particles having a diameter of 5 μm or less and the particles having a diameter of 48 μm or more are each 5% by volume or less.