JPH0579706B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to novel pigments for make-up cosmetics and cosmetics containing them. More specifically, the present invention relates to pigments and make-up cosmetics that are smoother and feel better than conventional pigments. It provides:

Conventional make-up cosmetics represented by powder foundation, rouge, and eye shadow,
In order to prevent makeup from fading due to the perspiration of the skin, or to make makeup last longer, metal soap is added to it, or the surface of the pigment is coated with silicone or metal soap to give it water-repellent properties. It's here.

Although silicone-treated pigments have excellent water repellency, they have drawbacks such as poor adhesion to the skin and the tendency to make the skin rough.

Metallic soap-treated pigments have good adhesion, but are unsatisfactory in terms of spread and feel.

Various proposals have been made and used to solve the above problems.

For example, animal oils such as squalane and lanolin, fatty acids and esters thereof such as myristic acid and stearic acid, vegetable oils such as olive oil and avocado oil, glycerin esters of coconut oil fatty acids, natural waxes such as beeswax and wood wax,
Examples include oils and fats.

However, animal and vegetable oils, myristic acid,
Fatty acids such as stearic acid and their esters have little effect on improving texture, and when heated in the treatment process, they often change in quality and develop a peculiar odor, which is not preferred.

Furthermore, although natural oils and fats such as wood wax have some effect on improving the texture, they have problems such as discoloration and peculiar odor when heated, making them difficult to use in cosmetics.

The inventors of the present invention have conducted extensive research to solve the problems encountered so far and develop an ideal pigment for make-up cosmetics, and as a result, have arrived at the present invention.

That is, by coating the surface of the pigment with saturated fatty acid triglyceride, a pigment that was smooth, spreadable, and had excellent adhesion was obtained.

Furthermore, by simultaneously or sequentially coating with a hydrophobizing agent such as silicone or metal soap, a pigment with very excellent characteristics such as strong water repellency, smoothness, good spreadability and good adhesion was obtained.

Make-up cosmetics containing pigments treated in this way have a very pleasant feel and are superior in terms of spreadability, adhesion, and smoothness to those using conventional pigments treated with silicone or metal soap. It was very good.

The present invention will be described in detail below.

The saturated fatty acid triglycerides used in the present invention are those obtained by esterifying saturated fatty acids and glycerin, or those obtained by hydrogenating unsaturated fatty acid triglycerides contained in natural oils, fats, and waxes, and have an iodine value of 5 or less. be.

Moreover, natural fats and oils before hydrogenation are oxidized,
It is important to choose a good quality one that does not discolor.

The fatty acid of the triglyceride used in the present invention has 10 or more carbon atoms, and those with 12 or more carbon atoms are more preferable in terms of smoothness.

Examples of natural fats and oils that are hydrogenated include herring oil, sardine oil, egg yolk oil, beef tallow,
Animal oil or fat such as lard, coconut oil, castor oil, camellia oil, peanut oil, olive oil, sesame oil,
Vegetable fats and oils such as cottonseed oil, rapeseed oil, soybean oil, and rice oil, oils, and fatty acid triglycerides with a carbon number of 10 or more that can be hydrogenated to have an iodine value of 5 or less can be used. These may be used alone or in combination.

The amount of saturated fatty acid triglyceride added is 0.2% to the pigment or extender pigment to be treated.
Used in the range of 30%.

If the amount added is less than 0.2%, sufficient effects in terms of smoothness and adhesion will not be obtained, and if it is more than 30%, saturated fatty acid triglycerides will be liberated, which will impair the feel.

The method of hydrogenating the above-mentioned unsaturated fatty acid triglycerides is commonly used, but
A common method is to add hydrogen by heating and pressurizing in the presence of a metal catalyst such as nickel.

Examples of the hydrophobizing agent used in the present invention include silicone oil, metal soap, acylamino acid salt, lecithin, acylated peptide salt, and fluorine-based water repellent.

These may be used alone or in combination, but are usually used in a range of 0.5 to 5%.

To give an example of a method for surface treating a pigment or extender pigment with the saturated fatty acid triglyceride of the present invention, first, the saturated fatty acid triglyceride obtained by the above method is dissolved or dispersed in an organic solvent or the like.

In general, organic solvents such as alcohols, ethers, esters, ketones, paraffin hydrocarbons, methylene chloride, organic chlorides such as chlororum are used, but they can be dissolved at room temperature or by heating.
Alternatively, anything can be used as long as it is dispersed and the saturated fatty acid triglyceride is not altered or hydrolyzed.

Next, the pigment to be surface treated (e.g. titanium oxide, zinc oxide, zirconium oxide, Bengara, yellow iron oxide, black iron oxide, ultramarine blue, deep blue, chromium oxide,
Inorganic pigments such as chromium hydroxide, talc, kaolin,
Muscovite, sericite, other micas, magnesium carbonate, calcium carbonate, aluminum silicate, magnesium silicate, calcium silicate, clays and other extender pigments, mica titanium bismuth oxychloride, tar pigments, natural pigments, silica beads , nylon, acrylic beads, etc.) and mix well until homogeneous. By drying this, a pigment or extender pigment whose surface is coated with saturated fatty acid triglyceride is obtained.

At this time, pigments or extender pigments that have been made hydrophobic in advance with silicone oil, metal soap, acylamino acid salts, lecithin, acylated peptide salts, fluorine-based water repellents, etc. are used, or the above-mentioned hydrophobic agents are added at the same time. It is more preferable to carry out surface treatment.

The treated pigment thus obtained is extremely smooth and spreads well, which is superior to conventional silicone-treated, metallic soap-treated pigments, etc.

Furthermore, by using a conventionally used hydrophobizing agent in combination, a pigment with even more excellent characteristics can be obtained.

In addition, makeup cosmetics containing treated pigments obtained in this way are smooth, spread well, and
The result is a make-up cosmetic with an unprecedented feel.

This will be explained in more detail with reference to Examples below.

Example 1 Add 2 g of hydrogenated beef tallow (iodine value 0.5) dissolved in 15 g of xylol to 100 g of talc (average particle size 5 μ), mix for 10 minutes with a household mixer, and heat to 100°C.
The powder was dried for 2 hours to obtain a treated powder whose surface was coated with saturated fatty acid triglyceride. The resulting product was extremely smooth and spreadable compared to the untreated product.

Example 2 To 50 g of sericite, 1 g of methylhydrodiene polysiloxane and 1 g of hydrogenated egg yolk oil dissolved in 15 g of benzene were added and mixed for 10 minutes using a household mixer.

The film was then air-dried at room temperature to completely remove benzene, and then baked at 120°C for 3 hours.

The obtained silicon-treated powder was very smooth, had good spreadability, and had good adhesion.

Comparative Example 1 100 g of sericite was added to 0.5 g of vigorously stirred water and uniformly dispersed. 1 g of potassium myristate was added to this and completely dissolved. Next, 10 ml of a 20% aqueous zinc sulfate solution was added over a period of 10 minutes, and then a solution of 2 g of lanolin dissolved in 20 g of hot ethanol was added dropwise little by little and stirring was continued for another 10 minutes. After the reaction is complete, suction filter with Nutsuchie and crush into small pieces.105
It was dried with hot air at ℃ for 10 hours.

Although the obtained metal soap-treated sericite had good adhesion, it did not spread well and did not have a good feel.
Moreover, the water repellency was also slightly inferior.

Comparative Example 2 1.5 g of methylhydrodiene polysiloxane was completely dissolved in 15 g of benzene, added to 50 g of sericite, and mixed for 5 minutes using a household mixer. This was air-dried at room temperature to completely remove benzene, and then heated to 120℃.
Baking treatment was carried out for 3 hours.

The obtained silicon-treated sericite had a slightly peculiar odor and had excellent water repellency and fluidity, but the powder had a very dry feel and poor adhesion, and it became dry when applied to the skin.

Example 3 To 50 g of the powder obtained in Comparative Example 2, 1 g of stearic acid triglyceride was added to 10 g of ethyl ether.
The mixture was added to the solution and thoroughly mixed, and then air-dried to obtain a powder in which the hydrophobized pigment was coated with stearic acid triglyceride. The obtained powder was very smooth, had good adhesion, and had a moist feel.

Example 4 Comparative Example 3 A powder foundation with the following formulation was made.

Powder foundation component 1 Sericite 50.0 (parts by weight) Talc 8.1 Mica powder 3.0 Titanium mica 3.0 Titanium oxide 19.0 Yellow iron oxide 3.0 Petal pattern 1.0 Black iron oxide 0.2 The above extender pigments and pigments were surface-treated by the method of Example 3. .

Component 2 Squalane 5.0 Methylpolysiloxane 3.0 Isopropyl myristate 2.0 Paraffin 1.0 Surfactant 1.0 Preservative 0.2 Fragrance 0.5 Mix component 1 with a Henshil mixer and pulverize with an atomizer. The heated mixture of component 2 is put into this, mixed with a Henshil mixer, and then pulverized with an atomizer again. This was filled into a medium plate and molded to produce a product.

The powder foundation obtained in the above example was a two-way type powder foundation with strong water repellency that could be applied with a sponge or with a sponge containing water.

A comparison was made using a powder foundation made in the same manner using pigments and extender pigments that had been treated with methylhydrodiene polysiloxane using the same raw materials as in Comparative Example 2 and adding Component 2. Powder foundations using the pigments of the present invention were excellent in terms of application, adhesion to the skin, spreadability, and smoothness after makeup application.

As is clear from the above description, the pigment or extender pigment whose surface is coated with saturated fatty acid triglyceride of the present invention is extremely smooth, spreads well, and has an excellent feel. It is ideal for make-up cosmetics such as foundation, rouge, and eye shadow.

Claims (1)

[Scope of Claims] 1. A pigment or extender whose surface is coated with saturated fatty acid triglyceride. 2. The pigment or extender pigment according to claim 1, for use in makeup cosmetics. 3. A pigment or extender whose surface is coated with saturated fatty acid triglyceride and a hydrophobizing agent. 4. The pigment or extender pigment according to claim 3, for use in makeup cosmetics.