JPH072614B2 - Cosmetics - Google Patents

Description

The present invention relates to an improved cosmetic composition, in particular, even when an inorganic pigment and a fragrance are coexistently mixed, the fragrance of the fragrance does not change for a long period of time, and a color effect is obtained. Also in terms of the above, the aim is to provide excellent cosmetics.

Conventionally, when a fragrance is added to a cosmetic using an inorganic pigment, the fragrance changes with time, and particularly under high temperature and high humidity, the speed of the change also increases, and the odor is significantly changed. It was a major cause of loss of value.

Up to now, various methods have been studied in order to prevent such problems, but as a specific example, first, from the pigment side, a method of subjecting the surface to metal soap treatment, a method of performing silicon treatment, A method of applying amorphous silica treatment,
Also known is a method of treating with a metal ion sequestering agent or further treating with metal soap (JP-A-52-122639). From the fragrance side, finely divided silica or metal soap powder with low activity is treated. There has been known a method of adsorbing a fragrance to and blending it, a method of adsorbing it to a porous powder and blending.

However, among the above methods, when the inorganic pigment is subjected to a metallic soap treatment or an amorphous silica treatment, the number of days until a slight scent change occurs in the normal state is extended, but at high temperature and high humidity There was no effect and the coloring power was also reduced. Similarly, the silicone treatment had almost no effect in terms of suppressing fragrance change.

Further, in the case of using the method disclosed in JP-A-52-122639, when the inorganic pigment is only treated with a sequestering agent, the surface of the inorganic pigment becomes very hydrophilic and water resistant. And it is very difficult to filter after treatment, and it is difficult to say that it is advantageous in terms of industrial scale and economy. Furthermore, even when the metal soap treatment is performed after the metal ion sequestering agent treatment, the metal complex salt pigments among the inorganic pigments, especially navy blue, etc., have the property of being unstable with respect to alkali, and thus decompose and This resulted in a transparent solution in which the parts were colored, and the actual yield as a pigment was significantly reduced. Further, the obtained pigment has a lower coloring power than that of the untreated pigment, and requires about twice the amount of the pigment to obtain the same color tone.

On the other hand, regarding the adsorption method from the study on the fragrance side, only the odor was delayed a little with time, and almost no effect was observed under the conditions of long term, high temperature and high humidity.

That is, there are various types of alcohols, ketones, aldehydes, esters, ethers, and the like in the perfume component mixed with the inorganic pigment in cosmetics, and it is unclear in the interaction or reaction between these and the inorganic pigment. There are many parts, and it has been difficult to prevent the odor from changing in all cosmetics by the conventional methods.

Therefore, as a result of intensive studies conducted by the present inventors in view of these circumstances, after the inorganic pigment was first treated with a sequestering agent, the metal oxide obtained by hydrolysis of the metal organic salt was treated. A thin and uniform coating does not change the scent even in the presence of a fragrance, and has a superior coloring power to colored pigments compared to untreated inorganic pigments. The present invention has been completed based on such findings.

That is, according to the present invention, the inorganic pigment is immersed in an aqueous solution of a sequestering agent, dehydrated and dried, and then the inorganic pigment is again dispersed in an alcohol or hydrous alcohol solution, and an organic metal salt is added thereto for hydrolysis. Thus, the present invention relates to a cosmetic composition comprising an inorganic processed pigment obtained by coating the surface of an inorganic pigment by causing precipitation of a metal oxide and a fragrance.

Hereinafter, the present invention will be described in detail.

Examples of the inorganic pigment applicable to the present invention include talc, sericite, kaolin, clay minerals such as mica, iron oxide, metal oxides such as zinc oxide, navy blue, and metal complex salts such as blue No. 404. Among these, the metal complex salts, especially the deep blue, which have the most problems in the conventional methods and have the most remarkable enhancement of the coloring power are most advantageous in the methods according to the present invention.

Further, as the metal ion sequestering agent, EDTA and its alkali metal salts such as EDTA-2Na, EDTA-4Na, etc. are used, and the required amount in use thereof is 0.5 to 10 with respect to the inorganic pigment.
A weight% range, preferably a range of 1-5%, is selected.
Further, upon treatment, it is usually used as an aqueous solution of a sequestering agent having a concentration of about 0.01 to 10%.

Next, as the organic metal salt, an organic silicate such as ethyl silicate, aluminum isopropoxide, aluminum monobutyl isopropoxide, aluminum monobutyl.
Organic aluminum salts such as diisopropoxide, titanium tetraisopropoxide, isopropoxytitanium dimethacrylate isostearate, isopropoxytitanium triisostearate, tri-n-butoxytitanium monostearate, isopropoxytitanium trisate, etc. Examples include titanium salts. When the metal oxide is coated with these organic metal salts, the following method is used.

For example, when silica coating or alumina coating is performed using an organic silicate such as ethyl silicate or an organic aluminum salt such as aluminum isopropoxide, the organic silicate or the organic aluminum salt is treated with alcohol or water / water. A method is preferred in which an organic silicate or an organic aluminum salt is hydrolyzed by dissolving it in an alcohol mixed solution, adding a small amount of an acid or an alkali thereto, and heating. However, when using a metal complex salt that is weak against alkali such as dark blue as an inorganic pigment, it is better to use an acid.

Further, when performing titanium dioxide coating using an organic titanium salt such as titanium tetraisopropoxide, water is added to an organic solvent in which water such as methanol or ethanol is dissolved.
To a mixed solution containing about 1 to 10%, a solution prepared by previously dissolving an organic titanium salt in isopropanol or the like is gradually added and hydrolyzed. If the concentration of water is 10% or more, the hydrolysis rate becomes high, and it becomes difficult to form a titanium dioxide film uniformly and densely on the surface of the inorganic pigment. Therefore,
The preferred concentration range of water is about 0.1 to 3%.

The coverage of silica, alumina, metal oxides such as titanium dioxide formed as described above is 0.
A range of 5 to 20% by weight, preferably 1 to 5% by weight is advantageous. If it is less than 0.5% by weight, the water resistance deteriorated by the treatment with a sequestering agent is not improved, and if it exceeds 20% by weight, when the inorganic pigment is a clay mineral, the change of the touch surface becomes large, and in the case of the colored pigment, On the contrary, the coloring power decreases.

Next, the dosage form of cosmetics using the inorganic processed pigment according to the present invention can be applied to all dosage forms that can usually use inorganic pigments. For example, eye color, cheek color,
Various powder products such as pressed powder, powder foundation, cakes, etc., as well as creams, emulsions, nail colors and the like can be mentioned. Further, there is no limitation on the blending amount. Furthermore, in the cosmetics of the present invention, various raw materials generally used together with inorganic pigments such as nylon powder, organic powder such as polyethylene powder, squalane, IP
M, 2-ethylhexanoic acid triglyceride, oil agents such as liquid paraffin, other surfactants, moisturizers, medicinal ingredients and the like are used.

Here, in order to describe the inorganic processed pigment according to the present invention in more detail, a production example will be shown below.

Production Example 1 99.5 parts of navy blue was immersed in 500 parts of a 0.1% EDTA-2Na aqueous solution for 12 hours with stirring at room temperature, dehydrated, and dried in a dryer at 60 ° C. for 2 days. Then, this was dispersed in 500 parts of a methanol solution containing 3% water, and a solution of 2 parts of titanium tetraisopropoxide dissolved in isopropanol was gradually added thereto. After completion of the addition, the solvent was distilled off under reduced pressure and the residue was dried at 60 ° C. for 22 hours.

Production Examples 2 to 5 As an aqueous solution of a sequestering agent, 500 parts of 0.2% EDTA-2Na aqueous solution, 500 parts of 0.4% EDTA-2Na aqueous solution, and 1% EDTA-2Na respectively
The procedure of Production Example 1 was repeated except that 500 parts of an aqueous solution and 500 parts of a 2% EDTA-2Na aqueous solution were used.

Production Examples 6 to 10 Titanium tetraisopropoxide 4 parts, 8 parts, 20 parts, 40 parts, and 100 parts were used as the organic metal salt, respectively,
It carried out like manufacture example 1.

Production Example 11 99.5 parts of navy blue was immersed in 500 parts of a 0.1% EDTA-4Na aqueous solution for 12 hours with stirring at room temperature, dehydrated, and dried at 60 ° C. for 2 days in a dryer. Then, this was dispersed in 500 parts of an ethanol solution in which 8 parts of ethyl silicate was dissolved, heated to 60 ° C., and then an ethanol solution containing 3% water (containing 0.001 N hydrochloric acid) was gradually added. Was added. After completion of the addition, the solvent was distilled off under reduced pressure and the residue was dried at 60 ° C. for 22 hours.

Production Example 12 99.5 parts of navy blue was immersed in 500 parts of a 0.1% EDTA-2Na aqueous solution for 12 hours with stirring at room temperature, dehydrated, and dried in a dryer at 60 ° C. for 2 days. Then, this was dispersed in 500 parts of an ethanol solution in which 5 parts of aluminum tetraisopropoxide was dissolved, heated to 60 ° C., and then an ethanol solution containing 3% water (containing 0.001 N hydrochloric acid). Added slowly.
After completion of the addition, the solvent was distilled off under reduced pressure and the residue was dried at 60 ° C. for 22 hours.

Production Example 13 99.5 parts of talc was immersed in 500 parts of a 0.1% EDTA-4Na aqueous solution for 12 hours with stirring at room temperature, dehydrated, and dried in a dryer at 60 ° C. for 2 hours.
Allowed to dry for days. Then, this was dispersed in 500 parts of an ethanol solution in which 4 parts of ethyl silicate was dissolved, heated to 60 ° C., and then an ethanol solution containing 3% water (containing 0.001 N hydrochloric acid) was gradually added. Was added. After completion of the addition, the solvent was distilled off under reduced pressure and the residue was dried at 60 ° C. for 22 hours.

Production Example 14 99.5 parts of iron oxide was immersed in 500 parts of 0.2% EDTA-4Na aqueous solution for 12 hours with stirring at room temperature, dehydrated, and dried at 60 ° C. for 2 hours in a dryer.
Allowed to dry for days. Then, this was dispersed in 500 parts of an ethanol solution containing 3% of water, and a solution of 4 parts of titanium tetraisopropoxide dissolved in isopropanol was gradually added thereto. After completion of the addition, the solvent was distilled off under reduced pressure and the residue was dried at 60 ° C. for 22 hours.

Next, in order to evaluate the inorganic processed pigments according to the present invention obtained as described above, the dark blue processed pigments, talc processed pigments, iron oxide processed pigments obtained in Production Examples 1 to 14 and untreated as comparative products were used. Using treated blue-blue, talc, and iron oxide, changes in fragrance in the presence of various fragrances were measured. The method is to mix 95 parts of sample pigment and 5 parts of fragrance, and mix this at 40 ° C and 100% RH.
The change in the scent after being left under for one month was evaluated by sensory evaluation by 6 scent panelists. The results are shown in Table-1.

(Evaluation Criteria) 0: No change −1: Slight change −2: Slight change −3: Large change As shown in the results of Table-1, the processed pigment according to the present invention has various types of fragrances. It was revealed that it has a strong inhibitory effect on the change of scent.

Similarly, the present inventors, in order to evaluate the tinting strength of the colored inorganic processed pigment obtained by the method according to the present invention,
The test was conducted by the method shown below.

(Method) Using the dark blue processed pigment obtained in Production Example 1 and untreated dark blue as a comparative product, these were mixed with talc at a ratio of 1: 9, and then squalane (oil amount: 0% 4%,
8%, 12%) is coated and pressed on a metal plate, and then the color tone is measured by color difference correction (L value, b
Value) The results are shown in FIGS. 1 and 2.

As is clear from the results of FIG. 1 and FIG. 2, the dark blue processed pigment according to the present invention has a lower lightness than untreated dark blue,
It was highly saturated (bluish) and excellent in coloring efficiency, and even with the same color tone, it had a coloring power that was 1/3 of the amount of untreated dark blue.

As described above, the inorganic processed pigment according to the present invention, in combination with the reduction of the pigment surface activity by the sequestering agent treatment and the coating effect of the low surface activity inorganic oxide,
It has excellent fragrance change suppressing effects of various fragrances, does not deteriorate water resistance, and has a unique property of further enhancing the coloring effect of colored pigments.

Next, examples of the cosmetics of the present invention will be shown. The mixing ratio is parts by weight.

Example 1. Eye color (A) Talc processed pigment (Production Example 13) 17 Obtained in the same manner as in Production Example 13 15 Sericite processed pigment Zinc stearate 3.3 Iron oxide processed pigment (Production Example 14) 2 Dark blue processed pigment (Production Example 1) 2 Preservative 0.2 (B) Octyldodecyl oleate 10 Isopropyl myristate 10 Blended fragrance 0.5 (C) Pearl agent 40 (Method) (A) is mixed with a Henschel mixer, and then taken out and ground with a grinder. Then, this was put into a Henschel mixer, (B) was mixed with this, then (C) was mixed, and this was crushed again and then press-molded in a mold.

The obtained eye color was allowed to stand at 40 ° C. and 100% RH for 1 month, and the sensory evaluation of 6 scented panelists was compared with that before standing, and no change in scent was observed.

Example 2. Teak color (A) Talc processed pigment (Production example 13) 60 Nylon powder 4.5 Titanium mica 6.8 Iron oxide processed pigment (Production example 14) 2 Dark blue processed pigment (Production example 11) 2 Preservative 0.2 (B) Squalane 5 Octyldodecyl oleate 4 Blended fragrance 0.5 (C) Pearl agent 15 (Method) The same procedure as in Example 1 was carried out.

The obtained cheek color was evaluated for scent in the same manner as in Example 1, but no change in scent was observed.

Example 3. Eye color (A) Silicon treated sericite 25.3 Silicon treated talc 20 Nylon powder 4 Zinc stearate 2 Iron oxide processed pigment (Production Example 14) 5 Dark blue processed pigment (Production Example 12) 10 Preservative 0.2 (B) 2-Ethylhexanoate 8 Squalane 8 Blended fragrance 0.5 (C) Pearl agent 17 (Method) The same procedure as in Example 1 was carried out.

The obtained eye color was evaluated for scent in the same manner as in Example 1, but no change in scent was observed.

Example 4. Powder foundation (A) Silicon treated talc 28 Silicon treated sericite 20 Nylon powder 3 Titanium mica 3 Titanium oxide 10 Iron oxide processed pigment (Production Example 14) 1 Navy blue processed pigment (Production Example 2) 0.3 Preservative 0.2 ( B) Silicone oil 4 Octyldodecyl oleate 10 Blended fragrance 0.5 (C) Pearl agent 20 (Method) The same procedure as in Example 1 was carried out.

The obtained powder foundation was evaluated for scent in the same manner as in Example 1, but no change in scent was observed.

Example 5. Cream (A) Squalane 20 Stearic acid 5 Cetanol 2 Beeswax 2 Vaseline 6 Sorbitan monostearate 2 POE (30) Monostearate 3 (B) 0.8 Kaolin-processed pigment obtained in the same manner as in Production Example 13 Oxidation Iron processed pigment (Production Example 14) 0.3 Dark blue processed pigment (Production Example 3) 0.3 (C) Glycerin 5 1,3-butylene glycol 5 (D) Purified water 47.9 Preservative 0.2 (E) Formulated perfume 0.5 (Method) (B ) Was kneaded with (C) and kept at 80 ° C. (D)
Throw in. On the other hand, (A) is melted by heating and kept at 80 ° C. Next, the mixture of (B), (C), and (D) is added to (A), emulsified with a homogenizer, cooled, and (E) at 35 ° C.
Is added and cooled further.

The obtained cream was evaluated for scent in the same manner as in Example 1 (but without humidification), but no change in scent was observed.

[Brief description of drawings]

FIG. 1 shows the relationship between the oil amount (%) at the time of coating with squalane and the lightness (L value).
In the figure, (a) is the dark blue processed pigment of Production Example 1, and (b) is the untreated dark blue. FIG. 2 shows the relationship between the oil amount (%) and the saturation (b value) at the time of coating with squalane, in which (c) is the dark blue processed pigment of Production Example 1,
(D) is unprocessed dark blue.

Claims (3)

[Claims] 1. An inorganic pigment is immersed in an aqueous solution of a sequestering agent, dehydrated and dried, and then the inorganic pigment is dispersed again in an alcohol or hydroalcoholic solution, and an organic metal salt is added thereto for hydrolysis. As a result, the cosmetic composition is characterized in that the surface of the inorganic pigment is coated with the precipitate of the metal oxide, and the processed inorganic pigment is mixed with the fragrance. 2. The cosmetic according to claim 1), wherein the inorganic pigment is a metal complex pigment. 3. The cosmetic according to claim 1), wherein the coverage of the metal oxide is 0.5 to 20% by weight based on the inorganic pigment.