JPH0466447B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a novel eye makeup cosmetic. More specifically, the present invention
In particular, the present invention relates to an eye make-up cosmetic having a moderate viscosity and excellent gelling stability, which causes less bleeding and can provide good lines when used as a pen-shaped cosmetic tool.

BACKGROUND TECHNOLOGY Conventionally, eye makeup cosmetics such as eyeliner, eyebrow, eyeshadow, and mascara have been used by, for example, storing a high viscosity liquid cosmetic in a container, soaking the cosmetic in a brush, and using a brush. A bottle type in which a low-viscosity liquid cosmetic is contained in a container and the cosmetic is guided to a pen tip made of a sponge or the like using the capillary force of an inductor wick, and a pen type in which a solid cosmetic is contained in a core. Some of the most well-known types include the pencil type, which uses powdered cosmetics, and the type where powdered cosmetics are applied with a brush or sponge.

However, in the bottle type mentioned above, the contents are highly viscous, so the drawn lines tend to be blurred, the liquid needs to be refilled frequently during use, and the user has to use both hands to perform the movements. On the other hand, the pen type is not as inconvenient to use as the bottle type, but
Since low viscosity cosmetics are used, the cosmetics bleed into the wrinkles of the skin, and in order to achieve low viscosity, it is difficult to impart water resistance to the cosmetics. .

Furthermore, the powder type and pencil type have drawbacks similar to those of the bottle type described above, and in particular, the pencil type also has the drawback that the tip is hard and may hurt the eyes.

Problems to be Solved by the Invention The present invention provides excellent drawing lines when used as a pen-shaped cosmetic tool, has less bleeding after application, is easy to use, and has pigment dispersion stability and gelation stability. The purpose of this invention is to provide eye makeup cosmetics with excellent properties.

Means for Solving the Problems As a result of extensive research in order to develop eye makeup cosmetics suitable for use in pen-type cosmetics, the present inventors discovered that iron-based inorganic pigments and structural viscosity imparting agents We have discovered that the above objective can be achieved by blending a specific chelating agent into an aqueous dispersion containing an anionic polymer compound and adjusting its viscosity within a predetermined range. The present invention has now been completed.

That is, the present invention comprises (A) an iron-based inorganic pigment, (B) an anionic polymer compound, and (C) at least one chelating agent selected from ethylenediaminehydroxyethyltriacetic acid and its salts. The present invention provides an eye makeup cosmetic comprising an aqueous dispersion having a viscosity of 3 to 300 cps at a temperature of 25°C.

The present invention will be explained in detail below.

The cosmetics of the present invention are suitably used in pen-shaped cosmetic tools, such as paint markers that open valves by pressing the pen core, ink supply types that use piston movement, and ink draw-out types that use capillary force. , various types can be mentioned. There is no particular restriction on the type of pen nib, and any type of nib can be used as long as it can be impregnated with the cosmetic, such as a sponge core, a synthetic resin or animal hair brush, or a sliver nib.

Used in pen-shaped cosmetics like this to create good lines,
In order to obtain good application performance and usage characteristics, the viscosity of the cosmetic needs to be in the range of 3 to 300 cps at a temperature of 25°C.

In the cosmetic of the present invention, the aqueous medium used in the aqueous dispersion containing the iron-based inorganic pigment and the anionic polymer compound includes water or a mixture of water and a water-soluble organic solvent. As a water-soluble organic solvent, it has almost no irritation to the skin.
In addition, a material that is highly safe for the human body is used. Suitable examples of such water-soluble organic solvents include polyhydric alcohols such as ethylene glycol, propylene glycol, and glycerin.

The iron-based inorganic pigment used as component (A) in the cosmetic of the present invention is highly safe for the human body, and specific examples include yellow iron oxide, red iron oxide,
Examples include black iron oxide and dark blue. These pigments may be used alone or in combination of two or more. There is no particular restriction on the amount of the iron-based inorganic pigment, and it can be added in any amount within the range of the viscosity of the cosmetic of the present invention. selected within the range.

In the cosmetic of the present invention, an anionic polymer compound is used as a dispersant for the iron-based inorganic pigment particles, that is, component (B). Examples of the anionic polymer compound include gum tragacanth, guar gum, xanthan gum, gelatin, gum arabic, gum karaya, quince seed, carrageenan, sodium alginate, carboxymethyl cellulose, sodium polyacrylate, and maleic acid resin, and each of these They may be used alone or in combination of two or more. The amount of the anionic polymer compound is:
The viscosity of the resulting cosmetic is selected to be within a predetermined range.

The anionic polymer compound has strong structural viscosity and has excellent effects such as dispersion stability of pigment particles, prevention of liquid dripping from the tip of a pen in a pen-shaped container, and prevention of bleeding after application. However, it tends to gel in the presence of metal ions, especially divalent or trivalent iron ions, and as in the present invention, iron-based inorganic pigments are used in combination. In some cases, elution of iron ions into the aqueous dispersion is unavoidable, leading to gelation.

Therefore, in the cosmetic composition of the present invention, a chelating agent, that is, (C) is used to sequester the iron ions.
As a component, the general formula (wherein M ¹ , M ² and M ³ are each a hydrogen atom or a cation such as sodium, potassium or ammonium)
It is necessary to use seeds. As this salt,
The monosodium, disodium and trisodium salts of ethylenediamine hydroxytriacetic acid are preferred. The above-mentioned ethylenediamine hydroxyethyl triacetic acid and each salt may be used alone or in combination of two or more types depending on the desired pH of the cosmetic.

Conventionally, chelating agents for iron ion sequestration include:
Ethylenediaminetetraacetic acid (EDTA) is known as a typical example. This one has a pH of 1 to 4.
The effect of sequestering iron ions is greatest in the pH range, but at higher pH,
Although it is initially effective, it has the disadvantage that its sequestering ability decreases over time. Therefore, in the effective pH range of 4 to 9 of the cosmetic of the present invention, it is not suitable as a chelating agent for iron ions. Not valid.

On the other hand, ethylenediaminehydroxyethyltriacetic acid and its salts used in the present invention have a pH of 1 to
In the range of 4, the sequestration power of iron ions is inferior to that of EDTA described above, but for pH values higher than that, the sequestration power of iron ions is stronger than that of EDTA. By using this material, iron ions eluted into the aqueous dispersion are easily blocked, and as a result, gelation of the anionic polymer compound is suppressed.

The amount of the ethylenediamine hydroxyethyl triacetic acid or its salt to be blended is suitably in the range of equivalent to 40 times the weight of iron ions in the cosmetic.
If the amount is less than the above-mentioned range, the iron ion sequestration effect will be poor, and if it is more than the above range, there may be problems such as irritation, which is not preferable.

In the cosmetic composition of the present invention, a conventional dispersant can be added as desired. Such dispersants include, for example, phospholipids such as soybean phospholipids, egg yolk phospholipids, or hydrogenated products thereof, and surfactants. These phospholipids have little irritation to the skin,
Moreover, it is extremely safe for the human body, and has the effect of making the surface of the pigment particles lipophilic. On the other hand, nonionic surfactants that have almost no irritation to the skin and are highly safe for the human body, such as those with a carbon number of
Polyglycerin (4 to 8 moles of glycerin) ester of 13 to 23 saturated or unsaturated fatty acids, 12 carbon atoms
Polyoxyethylene (hereinafter abbreviated as POE) alkyl ether having ~22 saturated or unsaturated alkyl groups and the number of moles of ethylene oxide added is 8 to 50, saturated or unsaturated fatty acid residue having 13 to 23 carbon atoms POE sorbitan fatty acid ester having a group and the number of moles of ethylene oxide added is 6 to 20,
POE glycerin fatty acid ester having a saturated or unsaturated fatty acid residue or a vegetable fatty acid residue having 13 to 23 carbon atoms, and having an ethylene oxide addition mole number of 5 to 50, and an ethylene oxide addition mole number of 5 to 50
POE fiistosterol or POE fiisttanol, which has a saturated or unsaturated alkyl group having 12 to 22 carbon atoms, and has an added mole of ethylene oxide of 1 to 50 and an added mole of propylene oxide of 1 to 50.・POP (polyoxypropylene) block copolymer, POE alkyl phenyl ether having an alkyl group having 8 to 9 carbon atoms and having an added mole of ethylene oxide of 6 to 50,
The number of moles of ethylene oxide added is 8 to 100.
POE castor oil, POE hydrogenated castor oil having an added mole number of ethylene oxide of 8 to 100, and the like are preferably used. These nonionic surfactants are
Each may be used alone, or two or more types may be used in combination.

Furthermore, in the cosmetics of the present invention, other inorganic pigments, organic pigments, other pigment particle dispersants, or viscosity adjustment, fixing properties, water resistance, oil resistance, sweat resistance, drying properties, preservative properties, etc. Any additives used for the purpose of imparting properties can be blended as desired, as long as they do not provide support to the dispersion system. However, the viscosity of the cosmetic is 3~
It is necessary to adjust the formulation to be in the 300cps range.

The blending order for preparing the cosmetic of the present invention is that immediately after dispersing the iron-based inorganic pigment in an aqueous medium, ethylenediaminehydroxyethyltriacetic acid or its salt is added and thoroughly stirred, and then, It is desirable to add anionic polymer compounds and other additives. If an anionic polymer compound is added before adding ethylenediamine hydroxytriacetic acid or its salt, gelation may occur immediately in some cases, and pigment aggregation may occur.

Effects of the Invention The eye makeup cosmetic of the present invention not only provides excellent drawing lines, but also has excellent application performance such as less bleeding after application, and has good usage characteristics. It has excellent dispersion stability and gelation stability, and is particularly suitable for use in pen-shaped cosmetics.

Examples Next, the present invention will be explained in more detail with reference to examples, but the present invention is not limited to these examples.

Preparation example 1 Black iron oxide 30.0% by weight Sodium oleate 2.0 POE (20) cetyl ether 2.5 Purified water 65.8 100 Mix the above ingredients in a ball mill.
Stir for 10 hours to prepare a base for black eyeliner.

After this base was allowed to stand for 40 minutes, the iron concentration in the supernatant liquid was measured using an atomic absorption spectrometer and found to be 260 ppm.

Preparation Example 2 Red pepper 20.0% by weight Black iron oxide 10.0 Soybean phospholipid 2.0 POE (20) stearyl ether 2.5 Purified water 65.5 100.0 A brown eyeliner base with the above composition was prepared in the same manner as in Preparation Example 1. . The iron concentration in this base supernatant was 290 ppm.

Example 1 (1) Black eyeliner base of Preparation Example 1
50.0% by weight (2) Trisodium ethylenediamine hydroxyethyl triacetate (hereinafter abbreviated as HEDTA trisodium salt)
0.26 〃 (3) Propylene glycol 5.0% by weight (4) Methyl p-oxybenzoate 0.15 〃 (5) Propyl p-oxybenzoate 0.15 〃 (6) Gum tragacanth 0.3 〃 (7) Acrylic acid ester copolymer emulsion (acrylic Acid ester 50% by weight) 15.0 〃 (8) Purified water 29.4 〃 100.0 〃 Of the above formulation, (1) and (2) were mixed and stirred for 30 minutes, and then (3) to (8) were mixed therewith. and stirred to obtain a black eyeliner liquid. The viscosity of this eyeliner liquid was 183 cps at 25°C, and the pH was 7.4.

Pour this eyeliner liquid into a 30c.c. glass bottle.
The product was sealed tightly and observed for changes over time in an atmosphere of 50°C to determine stability over time. No gelation or thickening effect was observed even after 3 months, and the stability over time was extremely good.

Example 2 Brown eyeliner was prepared in the same manner as in Example 1, except that the brown eyeliner base obtained in Preparation Example 2 was used instead of the black eyeliner base, and carrageenan was used instead of tragacanth gum. A liner liquid was prepared.

The viscosity of this brown eyeliner liquid is 131 cps at 25℃
The pH was 7.3. Further, when the stability over time was determined in the same manner as in Example 1, no gelation or thickening effect was observed even after 3 months.

Comparative Example 1 In Example 1, HEDTA trisodium salt was not used,
A black eyeliner liquid was prepared in the same manner as in Example 1, except that the weight was replaced with purified water. When we looked for the stability of this product over time, we found that it was 3
After a few days, it completely gelled.

Comparative Example 2 In Example 2, HEDAT trisodium salt was not used,
A brown eyeliner liquid was prepared in the same manner as in Example 1, except that the weight was replaced with purified water. When the stability of this product over time was determined, it was completely gelled after 3 days.

Claims (1)

[Claims] 1 Contains at least one chelating agent selected from (A) an iron-based inorganic pigment, (B) an anionic polymer compound, and (C) ethylenediaminehydroxyethyltriacetic acid and its salts, and at a temperature of 25°C. Viscosity 3
Eye makeup cosmetics consisting of an aqueous dispersion having ~300 cps.