JPS61229808A - cosmetics - Google Patents

Abstract

PURPOSE:A cosmetic, containing a metal-coated mica prepared by forming a metal film on the particle surfaces of mica powder with a chemical plating agent and as necessary, firing the coated particles while heating as a colorant and capable of giving not only silver white pearly luster but also continuous colored pearly luster. CONSTITUTION:A cosmetic containing metal-coated mica obtained by forming metal films on the particle surfaces of mica powder having within 1-100$mum, particularly 5-70mum range average size of the major axis with narrow particle size distribution by chemical plating particularly the film of Ni and alloy there of, e.g. Ni-Cu or Ni-Zn, and as necessary firing the film at 200-500 deg.C tempera ture while heating as a colorant. The method for forming the plated film is carried out by preparing an aqueous suspension of plating pretreated mica powder, and adding the resultant plating suspension slowly thereto to give a strong uniform film on each particle and the control of the plating conditions is easy. Thus, the method is suitable.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to cosmetics, and more specifically, contains metal-coated mica as a coloring agent, in which a metal film is formed on the particle surface of mica powder using a chemical plating method. It is related to cosmetics.

[Conventional technology]

The use of mica powder, particularly sericite, as a material for cosmetics has been well known in the art.

On the other hand, mica powder coated with metal oxides (including hydrated materials) such as titanium dioxide is used as a material for cosmetics as a so-called pearl pigment because it provides a pearlescent luster.

On the other hand, metal powders such as aluminum powders are also sometimes used as glittering pigments in cosmetic materials.

[Problem that the invention seeks to solve]

Pearl pigments made by coating mica powder with titanium dioxide or the like generally have a shallow color tone, and it is difficult to obtain a continuous base color.

This is fundamentally due to the mixed coating with other metal oxides based on titanium dioxide.

On the other hand, the color tone of metal powder can also be changed by surface treatment, but in general, if the surface is not sufficiently treated, there is a risk of fire or explosion in the farming method, and it is not suitable for use only on the skin. Due to the strict requirements for safety, there are natural restrictions.

In view of the above points, the present invention was made by considering mica as a cosmetic material, and found that chemically plated mica is safer, has a brightness comparable to that of metal powder, and is even more interesting. This is because the heated and fired product forms a bright colored film with a wide continuous tone depending on the heating and firing conditions, so it was discovered that it is extremely useful as a cosmetic, and the present invention was completed.

[Means for solving problems]

That is, the gist of the present invention relates to a cosmetic containing, as a colorant, metal-coated mica in which a metal film is formed on the surface of mica powder particles based on a chemical plating method.

In the present invention, the type, mineral composition, shape, etc. of mica, which is the core material of the metal coating, are not particularly limited, and any mica can be used.

Examples include muacovite, paragonite, and phlogopite.
pite), biotite, lepidolite, zinwaldite
waldite) or sericite
These may be natural products or synthetic products.

Mica has a so-called hexagonal plate-like shape with a large aspect ratio, and the average diameter of the long axis is 1 to 700 μm1, preferably 5
It is preferable to have a narrow particle size distribution in the range of ~70 μm◎ The reason for this is that if the particle size is less than about 1 μm, the glossiness of the plating film tends to deteriorate, and if it is more than ioottm, the glossiness of the plating film tends to deteriorate. Although it is superior in terms of coloring properties, it is unsuitable when blended into cosmetics because it lacks dispersibility and uniform harmony with other cosmetics.

Further, it is preferable that the width of the particle size distribution is narrow because a uniform base color tone can be obtained.

The present invention is a patented product characterized in that a metal film is formed on such mica powder by chemical plating.

As the alloy film, Ni-Cu, Ni-Zn. Ni-
Examples include binary plating films such as Mn or Ni-Go, but if necessary, ternary plating films such as Ni-Co-Cu may also be used.

The content of the metal film varies depending on the type and size of the mica in the core material, the intended use of the cosmetic, or the chemical plating method, but in most cases it is between 5 and 70 parts by weight based on the total weight.
It is preferably in the range of 7 to 30 parts by weight.

The reason for this is that if the above content is less than 5% by weight, the glossiness based on the plating film will be insufficient, and although it is sufficient to provide glossiness on a 70% weight board, it is not economical. It is.

One of the characteristics of the metal-coated mica in the present invention is that it includes not only the metal-coated mica based on chemical plating as described above, but also the heated and fired products thereof.

Mica coated with chemical plating, such as nickel plating, has a silvery-white luster and exhibits a so-called pearlescent luster, but the fired products vary depending on the type of core material and the setting conditions, and especially depending on the heating and firing conditions. It has a bright coloring.

Moreover, the vivid bright color tone depends on the particle size of the core mica, and the larger it is, the better it is, and the gloss is also excellent.

The color tones are pale yellow, grass green, maroon, back yellow,
□ It is obtained as a colorant with a continuous range of tones from ultramarine to purple, etc., and these tones can further vary in lightness, saturation, and tone depending on the manufacturing conditions.

The metal-coated mica according to the present invention can be prepared by forming a metal film on the surface of mica particles by a chemical plating method, but such chemical plating is already known and, of course, a known method.

There is no problem in forming a coating.
, i.e. for example nickel salts, reducing agents, complexing agents and p
Mica powder, which has been pretreated to form a plating film, is added to a chemical plating solution prepared using various chemical solutions such as H adjusters as a basic solution to cause a plating reaction and form a nickel film. This is a method to do this.

However, this method often has difficulty dispersing the mica powder sufficiently to form a uniform, controlled coating.

Therefore, when preparing a matte coated mica which is advantageously suitable for cosmetics, the matte treatment method developed by the present inventor is suitable.

That is, this is a method in which a plating film is formed by preparing an aqueous suspension of pre-plated mica powder and adding a plating solution to the suspension, which is completely opposite to the conventional method.

According to this method, by gradually adding the plating solution when the mica powder is sufficiently deagglomerated, a substantially uniform and strong film can be obtained for each particle, and the plating conditions can be easily controlled.

One example of the manufacturing method is to prepare an aqueous suspension of mica powder to which at least a complexing agent has been added in advance, and then add to the suspension other plating liquids (nickel salt, reducing agent, and pH adjuster). By controlling and adding nickel-coated mica, nickel-coated mica can be effectively produced.

In this case, when attempting to obtain an alloy plating film, a corresponding soluble metal salt such as a copper salt, cobalt salt, zinc salt or manganese salt may be used as a mixed metal salt mixed with a nickel salt. Next, as described above, the metal-coated mica is colored by heating and firing by chemical plating to give a coloring of 200-,! l-
A range of θO°C is suitable. , if the temperature is below 200℃,
The coloring speed is slow and no noticeable coloring occurs; on the other hand, if the temperature is above SOO℃, it is difficult to obtain a stable uniform coloring, resulting in a gray or gray-black color, and the luster is reduced. By disappearing.

As described above, the cosmetic composition of the present invention contains mica coated by chemical plating, and the mica includes silvery-white plated mica itself and colored plated coated mica obtained by heating and baking the mica.

Although the detailed mechanism behind the development of bright colors by heating and firing is unknown, it is probably due to the interference effect of a thin oxide film.

In addition, when used as a cosmetic, the metal-coated mica of the present invention may be subjected to a hydrophobic surface treatment with an organic silicate compound, a higher fatty acid, a metal salt thereof, an oil or fat, a wax, a higher alcohol, etc., as necessary. Good too.

In the present invention, the amount of metal-coated mica in the cosmetic varies depending on the type of cosmetic, the purpose of use, the type of mica, etc., but it is 0.00% based on the total weight of the cosmetic. /-50% by weight, preferably in the range of 0.5 to 30% by weight.

This is because if the amount is less than 0.1% by weight, the characteristics of the glitter cosmetic according to the present invention cannot be exhibited, and there is almost no need to exceed the amount of rob.

Cosmetics containing metal-coated mica according to the present invention are mainly used as foundations and makeup cosmetics such as white powder, louche, eye shadow, and nail polish, and these can be in the form of liquid cream, paste, powder, cake, or stick type. It can also be used as a type of cosmetic product.

〔Example〕

EXAMPLES The present invention will be specifically described below using Examples (hereinafter simply referred to as "Examples" unless otherwise specified), but the present invention is not limited thereto.

Preparation example of sample metal-coated mica Sample 1 Aspect ratio 33, average particle diameter ysμ door muscovite powder 1
00 parts by weight of γ-aminopropyltriethoxysilane 2
1/l and palladium chloride o, B;//l mixed solution i
The mixture was poured into a volumetric volume of ooθ, deagglomerated, and stirred and dispersed for about 73 minutes, followed by filtration and drying to perform plating pretreatment.

Next, 100 parts by weight of this pretreated muscovite powder was added to sjj/
An aqueous suspension was prepared by making 70 θ parts by volume of an aqueous sodium tartrate solution.

Next, nickel sulfate xooillca liquid) and sodium hypophosphite xo2f! /l! and sodium hydroxide l/
qg/l of the mixture (t) was added individually and simultaneously to the stirred aqueous suspension at a rate of addition of 5 oInl 1 min. After the complete addition, stirring was maintained until hydrogen generation stopped.

After filtering, washing with water and drying, a nickel-coated mica pigment with a silvery white luster and a nickel content of 30.9% by weight was obtained.

Sample 2~! The nickel-coated mica obtained in Sample 1 was heated and fired under various conditions to obtain colored, glossy metal-coated mica.

Table 1 Sample 6 Muscovite powder 1 with an aspect ratio of 3 g and an average particle size of 35 μm
00 parts by weight were sensitized with an acidic aqueous solution of 1 g/l of stannous chloride, then 0. Plating pretreatment was performed by activation treatment with an acidic aqueous solution of palladium chloride of /ill.

Then, after preparing an aqueous suspension of mica similar to sample 1,
The plating solutions A and B were added under control to obtain metal-coated mica powder with nickel plating on the surface of the mica particles.

This powder had a shiny silvery white color and the nickel content was 1.1% by weight.

Sample 7 Add 2 parts by weight of sodium stearate to 100 parts by volume of water and dissolve by heating, then add 100 parts by weight of metal-coated mica of Sample #I #3 or Sample I and stir to disperse uniformly. - 100 parts by weight of aluminum chloride hexahydrate
IO parts by volume of an aqueous solution of aluminum chloride dissolved in parts by volume of water were added dropwise. This liquid was dehydrated using a centrifugal dehydrator and heated to 10k℃.
A metal-coated mica was prepared by drying for 2 q hours and surface-treated with metal soap. □Sample g - Add 3 parts by weight of benzene ig to 3 parts by weight of demethylhydrodiene polysiloxane and dissolve the solution to 100 parts by weight of each of the colored metal-coated mica of Sample 3 and DA, and mix for 5 minutes with a household mixer. Mixed. This was air-dried for a few hours at room temperature to remove benzene, and then baked at 100° C. for 3 hours to prepare a λ type metal-coated mica whose surface was treated with silicon. The processed product of Sample 3 is designated as Sample Z, and the processed product of Sample DA is designated as Sample 9.

C. Fragrance and preservative: Mix appropriate amounts of A uniformly in a blender, then add B and mix evenly. Then, after adding C to the mixture, a homogeneous mixture is prepared to obtain a cosmetic product. This cosmetic had an excellent feel and spreadability on the skin.

Warm an appropriate amount of C fragrances and preservatives and mix them into the well-mixed B ingredients in advance □
Gradually add the combined A components while stirring.

Next, the mixture is further uniformly mixed using a Henshil mixer, cooled, and component C is added. After thorough mixing, the mixture is pulverized using an atomizer. This pulverized material was compacted by molding to obtain a cosmetic product.

This cosmetic product was glossy, had a light feeling on the skin, and spread well.

With the same composition and operation, except that Sample 7 was used instead of Sample B and Sample G was used instead of Sample 3 in Example C,
Got cosmetics.

Example (eyeshadow) C fragrance, preservative After mixing appropriate amount of A component with a Henshil mixer, heating and homogenizing B component, add to the homogeneous mixture of A component, then add C component. After thorough mixing, an eye shadow cosmetic product was obtained.

Example S In Example Hiro, an eye shadow cosmetic product was obtained with the same composition and formulation except that sample 7 was used instead of sample q, and sample wa and yellow iron oxide were used instead of sample 5.

C. Fragrance and preservative After heating and dissolving an appropriate amount of A to make it homogeneous, add B, which has been mixed in advance, and mix in a heated state. Next, C was added and the mixture was cooled and molded to obtain a lipstick cosmetic.

〔Effect of the invention〕

The metal-coated mica used in the present invention is not only a silvery-white so-called pearl pigment with excellent luster, but its heat-fired product has a unique color tone that exhibits continuous colored pearl luster, so it is different from conventional cosmetics. It can be used as a cosmetic.

Therefore, like conventional pearl pigments, they are preferably used alone or in combination.

All of the cosmetics according to the present invention apply makeup easily on the skin when used, and also have a unique luster and good color luster.

Patent applicant Nihon Kagaku Kogyo Co., Ltd. Director of the Agency of Industrial Science and Technology Hirobu Yoda Procedural Amendment 1
Voluntary] November 5, 1985

Claims (1)

[Scope of Claims] 1. A cosmetic containing metal-coated mica as a coloring agent, in which a metal film is formed on the surface of mica powder particles by chemical plating. 2. The cosmetic according to claim 1, wherein the chemical plating is nickel plating. 3. The cosmetic according to claim 1 or 2, wherein the metal-coated mica is colored by heat treatment at 200 to 500°C.