JPS61176514A - Solid cosmetic - Google Patents

Abstract

PURPOSE:To provide a solid cosmetic composed of a formed and sintered material of an inorganic pigment and a skin-adhesive substance impregnated in the pore of the sintered material, having improved shape-retainability, feeling to the skin and color, and suitable as a thin rod-shaped cosmetic such as eyeliner, eyebrow pencil, etc. CONSTITUTION:A white cosmetic having a porosity of preferably 50-90% is produced by kneading (A) a formed and sintered material of an inorganic pigment with (B) a skin-adhesive substance such as the base of various cosmetics of emulsion-type, ointment-type, etc. and impregnated in the pore of the above sintered material, with a mixer and a roll, extruding the kneaded mixture in the form of a thin rod, and sintering the rod after cutting. the inorganic pigment is e.g. kaolin clay, bentonite clay, titanium oxide, iron oxide, chromium oxide, CaCO3, MgCO3, silicic anhydride, ultramarine, etc., or their arbitrary combination.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to solid cosmetics. It is particularly suitable for eyeliners, eyelashes, etc., which are used as small diameter sticks.

[Conventional technology]

Solid cosmetics consist of coloring agents and excipients.

The coloring agents are pigments and dyes, the excipients are higher alcohols, higher fatty acids, wood wax, etc., and oily and semi-solid substances such as liquid paraffin, lanolin, and petrolatum are also often included.

Solidification is done by thoroughly kneading the colorant and excipient and then extrusion molding or pouring into a mold, but when the excipient is attached to the surface of the pigment and solidified by three layers. There are also such things.

[Problem that the invention seeks to solve]

If the excipient used to maintain the shape is used as much as possible, the application feeling on the skin and the coloration will be poor. On the other hand, in order to achieve as good application feel and color development as possible on the skin, shape retention must be sacrificed. This is why currently commercially available bar-shaped cosmetics and the like are used in situations where the correlation between the above-mentioned shape retention, application feel on the skin, and color development is extremely low.

[Failure to solve the problem]

The gist of the present invention is a solid cosmetic comprising a sintered molded body of an inorganic pigment and a skin-wearing substance impregnated into the pores of the sintered molded body.

Examples of inorganic pigments are Merck, Kaolin, Bentonite,
Calcium carbonate, magnesium carbonate.

Magnesium silicate, silicic anhydride, titanium oxide.

With zinc oxide, iron oxide, chromium oxide, gunji oxide, etc., 1
It is considered to be a species or a combination of two or more species. Examples of suitable materials include clay-based kaolin and bentonite, which are not only easily available but also require sintering at a relatively low temperature. As for the range of colors, various colors can be obtained by coexisting with other inorganic pigments. in this case.

Other inorganic pigments do not necessarily have to form a skeleton in the sintered compact.

The pores of the sintered compact are preferably about 50% to 90%, more preferably 70% to 85%. Generally, the smaller the porosity, the better the shape retention, and conversely, the larger the porosity, the better the application feel and coloring properties tend to be.

The printable substances that are impregnated into the pores of the sintered body include those mentioned above as excipients, as well as those used as base materials in various cosmetics such as emulsion type, ointment type, and emulsion type. A variety of materials can be used, including others. If it is difficult to impregnate, heat or pressure may be applied as appropriate, or a solvent may be used in combination. Also.

It can also be used in combination with dyes and fragrances. Even if the same sintered body is used and only one skin-adhesive substance is changed, solid cosmetics with different types can be obtained.

still,! 8! A method example will be described below, but the material used does not have to be the inorganic pigment itself that exists as a sintered compact. For example, if a modified material such as organic bentonite is used as a material, it will change during the sintering process, and there are many other materials that can be used that will undergo metamorphosis depending on the atmosphere during the sintering process. do.

〔Example〕

Hereinafter, parts simply refer to parts by weight.

(Example 1) Clay (bentonite type) 20 parts mischievous iron
20 parts chromium oxide
10 parts titanium oxide
10 parts polymethyl methacrylate 50
1 part Dioctyl phthalate 25 parts Methyl ethyl ketone 100 parts The above compounded materials were kneaded using a mixer and a roll machine, extruded into a thin wire, and cut into a length of 40xxK.

Place them in a magnetic crucible under an oxidizing (air) atmosphere.

After gradually raising the temperature to 300°C, sintering was performed at 800°C for 1 hour in a non-oxidizing (closed atmosphere). After natural cooling, the sintered body with black edges was taken out. And the diameter is 1.5 ax, also.

The porosity was 62%.

(Note) Porosity was measured by displacement method (20°C)
. That is, when the volume of the sintered compact is 71, the weight is W, the weight of the sintered compact after sweating with water is Wl, and the density of water is I.

Porosity = I (W'-W)ylV l x 100
(%) The above-mentioned sintered compact was impregnated with a plateable material prepared by uniformly adjusting the following ingredients (impregnation temperature: 120°C).

Vaseline 10 parts lanolin
10 parts liquid paraffin
20 parts sorbita/sesquiolate
2 parts (Example 2) Organic bentonite 20 parts chromium oxide 30 parts red iron
20 parts ABS resin
35 parts Dioctyl 7-talate 20 parts Stearic acid 2 parts Methyl ethyl ketone 100 parts A brown sintered compact with a porosity of 67% was obtained in the same manner as in Example 1 using the above-mentioned blended materials (with the exception that.

The sintering process is performed in an air atmosphere at a maximum temperature of 850°C).

Obtained. The sintered compact was impregnated with nine skin-adhesive substances by uniformly adjusting the following blended materials.

Carnauba wax 5 parts Ceresin wax 10 parts Misoru
10 parts Microcrystalline wax 10 parts Vaseline 20
Part lanolin 10 parts Liquid paraffin 20 parts Isopropyl myristate 2 parts (Example 3) Clay (kaolin type) 18 parts Red iron
40 parts titanium oxide
10 parts ABS resin
37 parts dioctyl phthalate 20 parts stearic acid 2 parts methyl ethyl ketone 100 parts Using the above compounding materials,
A brown sintered compact with a porosity of 74% was obtained in the same manner as in Example 2.

The maximum temperature for the sintering process is 900"C).

The obtained sintered compact was prepared in the same manner as in Example 2 and impregnated with a plateable material.

(Example 4) Clay (kaolin type) 16 parts red iron
50 parts polyvinyl chloride
45 parts dioctyl 7 tallate
20 parts stearic acid 2
Part methyl ethyl ketone 100 parts A brown sintered compact having a porosity of 84% was obtained in the same manner as in Example 3 using the above-mentioned blended materials.

The obtained sintered compact was impregnated with a plateable material prepared in the same manner as in Example 1.

(Comparative Example 1) Carnauba wax 15 parts Ceresin wax 15 parts Microcrystalline wax 20 parts Vaseline
7 parts lanolin 5 parts liquid paraffin 7 parts inclovir myristate
Add 0 copies.

After kneading with a roll machine, the mixture was poured into a mold to obtain a black cylindrical body (diameter K 1.5 xx as in each example).

(Comparative Example 2) Sword Luba Funx 10 parts Paraffin Wanx 20 parts Candelilla wax 3 parts Misoru
1 part isostearic acid 5 parts fluid breadfin 7 parts methylphenylpolysiloxane 4 parts To a uniform solution of the above ingredients, 15 JB of black iron oxide, 25 parts of red iron oxide, and 3 parts of Merck were added.

After kneading with a roll machine, the mixture was poured into a mold to obtain a dark brown cylindrical body (diameter: 1.5 mm, same as in each example).

[Effects of the Invention] Table IK shows the results of quality evaluation for each product.

Table 1 (Note) The bending strength was measured using a repmeter. In addition, since the comparative examples 1 and 2 have a large temperature dependence, the values in Table 2 are those at 25°C.

From Table 1, it can be seen that the solid cosmetic of the present invention has a greatly improved correlation between shape retention, application feel on the skin, and color development.

Claims (1)

[Claims] A solid cosmetic comprising a sintered shaped body of an inorganic pigment and a skin-applying substance impregnated into the pores of the sintered shaped body.