KR20070068629A - Cosmetic composition containing the dispersion type titanium dioxide and method for preparing a dispersion type titanium dioxide - Google Patents

Abstract

A cosmetic composition containing the dispersion type titanium dioxide and a method for preparing the same dispersion type titanium dioxide are provided to inhibit thick feeling which is resulted by using titanium dioxide itself, and to reduce viscosity of the cosmetic composition by using ethyl alcohol which inhibits sticky feeling of C12-C15 alkylbenzoate when the cosmetic composition contains the dispersion type titanium dioxide. The cosmetic composition contains titanium dioxide dispersed in C12-C15 alkylbenzoate together with a dispersing agent selected from aluminum stearate and polyhydroxystearic acid, wherein the composition further contains 5.0-10.0 wt.% of ethyl alcohol, and has viscosity of less than 8000 cps. The method for preparing the dispersion type titanium dioxide comprises the steps of: (1) adding alumina into micro particle titanium dioxide, stirring and filtering the mixture, and drying the filtered mixture at 70-90 deg.C to prepare complicated powder; and (2) introducing the dispersing agent into the complicated powder, and treating the mixed powder with C12-C15 alkylbenzoate.

Description

Cosmetic composition containing dispersion type titanium dioxide and a method for producing the same {Cosmetic composition containing the dispersion type titanium dioxide and method for preparing a dispersion type titanium dioxide}

1 is a result of observing the dispersion state of titanium dioxide prepared in Comparative Example 1 with an electron microscope.

2 is a result of observing the dispersion state of the dispersed titanium dioxide prepared in Example 1 with an electron microscope.

Figure 3 is a photograph measuring the turbidity of the cosmetic composition of Formulation Example 1 (Fig. 3a) and Comparative Formulation Example 1 (Fig. 3b).

Figure 4 is a graph of the results of measuring the sunscreen effect of the formulations according to the present invention.

5 is a result of comparing the stickiness of the makeup base of the formulation example and the comparative formulation example.

The present invention relates to a cosmetic composition containing titanium dioxide dispersed in C12-15 alkyl benzoate together with a dispersant and a method for producing the dispersed titanium dioxide.

Generally, titanium dioxide has phases such as srilankite, anatase, rutile, brookite, and amorphous, and usually anatase and rutile. ) Is the most used. It is not only physically very stable but also has a very high refractive index of about 2.5 to 2.8 and a small particle size. Its chemical properties such as whiteness, hiding power, and coloring power are also very good. . In addition, titanium dioxide is widely used as a white pigment in makeup cosmetic compositions because it is excellent in light, heat, and chemical resistance.

However, despite these effects, titanium dioxide has a strong cohesiveness between particles, which results in a rough feeling of graininess when applied to the skin, and indicates a feeling of stiffness when applied to makeup cosmetics. Titanium dioxide itself has a limited problem in its use and amount of use because of its limitation in application as a makeup cosmetic.

Accordingly, the present inventors have studied a method for solving the disadvantages of using titanium dioxide as a cosmetic, and as a result, by producing a dispersive titanium dioxide dispersed in C12-15 alkylbenzoate with a dispersant, titanium dioxide itself It has been found that it can improve the disadvantages such as rough feeling and turbidity. In addition, in the case of containing the dispersible titanium dioxide as a cosmetic, by using ethyl alcohol to prevent the stickiness of the dispersed phase oil C12 ~ 15 alkylbenzoate to find a cosmetic composition of low viscosity can be prepared and completed the present invention It was.

Accordingly, it is an object of the present invention to provide a low viscosity cosmetic composition containing dispersed titanium dioxide dispersed in C12-15 alkylbenzoate together with a dispersant.

In addition, another object of the present invention to provide a method for producing the dispersed titanium dioxide.

In order to achieve the above object, the cosmetic composition according to the present invention is characterized by containing a dispersed titanium dioxide dispersed in C12-15 alkylbenzoate (C12-15 alkylbenzoate). In addition, after the addition of 6.0 to 8.5% by weight of alumina to the dispersed titanium dioxide (1) particulate titanium dioxide, stirring and filtration to dry at 70 ~ 90 ℃ to prepare a first composite powder; And (2) introducing a dispersant into the powder and dispersing the mixture on C12-15 alkylbenzoate for 3 hours to produce dispersible titanium dioxide.

Hereinafter, the present invention will be described in more detail.

Dispersing titanium dioxide of the present invention (1) after adding alumina to the fine particle titanium dioxide, stirring and filtration to dry at 70 ~ 90 ℃ to prepare a first composite powder; And (2) adding a dispersant to the powder and dispersing it in C12-15 alkylbenzoate for 3 hours to produce dispersible titanium dioxide.

Particulate titanium dioxide in the step (1) is to have an average particle diameter of 10 ~ 50nm. The alumina is generally added by a surface coating process to reduce photoactivity, and is used at 6.0 to 8.5 wt%.

As the dispersant used in step (2), aluminum stearate and polyhydroxystearic acid are used. In addition, the C12-15 alkylbenzoate (C12-15 alkylbenzoate) is used in the range of 49 to 53% by weight.

Dispersion type titanium dioxide prepared by the above method according to the present invention can improve the disadvantages such as rough feeling and turbidity of the titanium dioxide itself by using C12-15 alkylbenzoate with a dispersant.

The dispersible titanium dioxide prepared by the above method is not particularly limited in the cosmetic composition, but contains 3.0 to 7.0% by weight, and ethyl alcohol is used to prevent sticking by C12-15 alkylbenzoate used as a dispersion solvent. do. In this case, the amount of ethyl alcohol is 5.0 to 10.0% by weight based on the total weight of the composition.

On the other hand, in order to provide a cosmetic composition having an optimal emulsification system in the preparation of the cosmetic composition containing the dispersed titanium dioxide of the present invention, as a result of applying a variety of emulsification system as described in the following table lauryl PEG-9 polydimethyl When emulsifiers such as siloxyethyl dimethicone and PEG-10 dimethicone were used, stable low viscosity cosmetic compositions of 8000 cps or less could be prepared.

Emulsifier Class Longitude (1 day) Longitude (7 days) Change over time Viscosity (1 day) Stability (high temperature) Stability (Cycle) Abil EM 90 / Crill 6 14.00 6.00 Severe 14000 Bad Floating severe KF-6038 / Crill 6 12.00 6.00 Severe 7000 Bad Day 2 Separation Abil EM 90 / KF-6038 15.00 13.00 usually 13500 usually unrest Abil EM 90 / S-Face IS 202P 13.00 detach ㅡ 13000 Bad Day 5 Separation KF-6038 / S-Face IS 202P 11.00 detach ㅡ 10000 Bad Day 5 Separation Crill 6 / S-Face IS 202P No oil painting Abil EM 90 / Emalex ss 5050 13.00 8.00 usually 12000 usually unrest KF-6038 / Emalex ss 5050 12.00 10.00 Almost none 8500 Good initial stability (floating after 10 days) Some oil floated after 7 days Crill 6 / Emalex ss 5050 12.00 detach usually 8000 usually Day 5 Separation S-Face IS 202P / Emalex ss 5050 No oil painting KF-6017 / KF-6038 11.00 9.00 Almost none 7500 stability stability ABIL EM 90: Cetyl Dimethicone Copolyol, Crill 6: Sorbitan Isostearate, S-Face IS 202P: Polygryceryl-2 Diisostearate , Emalex ss 5050: Dimethicone Colopyol, KF 6017: PIG-10 Dimethicone, KF-6038: Lauryl Fiji-9 polydimethylsiloxyethyl dimethicone (Lauryl PEG -9 Polydimethylsiloxyethyl Dimethicone)

The formulation of the cosmetic composition containing the dispersed titanium dioxide according to the present invention is not particularly limited, but may be formulated as a nourishing cream, essence, foundation, lipstick, skin cover and the like.

Hereinafter, although an Example and a comparative example are given and it demonstrates in detail of this invention, this invention is not limited only to these examples.

Example 1 Preparation of Disperse Titanium Dioxide

About 7 g of alumina was added to 73 g of particulate titanium dioxide having an average particle diameter of 10 to 50 nm, followed by stirring, filtration, and drying sufficiently at 70 to 90 ° C. Next, 3-7 g of aluminum stearate and 3-6 g of polyhydroxystearic acid were added to 32-38 g of the prepared titanium dioxide, and then about 49-53 g of C12 for 3 hours. Dispersed titanium dioxide was prepared by dispersing in -15 alkylbenzoate.

Comparative Example 1

Except not using a dispersant was prepared in the same manner as in Example 1 to prepare a titanium dioxide.

[Test Example 1]

In order to compare the dispersion state of the titanium dioxide prepared in Example 1 and Comparative Example 1, it was observed with an electron microscope. The results are shown in FIGS. 1 and 2.

1 to 2, the dispersion state of Comparative Example 1 (FIG. 1) without using a dispersant is not complete, and shows that some of the titanium dioxide particles are aggregated, whereas the dispersion state of Example 1 using a dispersant ( 2) was confirmed to be significantly improved.

[Formulation Example 1 and Comparative Formulation Example 1]

Formulation Example 1 and Comparative Formulation Example 1 were prepared as a makeup base formulation using the composition of Table 1 below.

Component (Content; Weight%) Formulation Example 1 Comparative Formulation Example 1 Decamethylcyclopentasiloxane (cyclomethicone) octylmethoxycinnamate cyclopentasiloxane / fiji.Fiji-19.19 Dimethicone Dimethicone Copolyol Lauryl Fiji-9 Polydimethylsiloxyethyl Dimethicone Disteadimonium Hectorite cyclomethicone / dimethiconevinyldimethiconecrosspolymer vinyldimethicone.Methicone Silsesquioxane Crosspolymer Talc Titanium Dioxide Butyleneglycol Sodium Chloride Disodium Dithiethyl Alcohol Iron Oxide (Yellow) Iron Oxide (Red) Preservative, Fragrance Distilled Water 24.0 4.0 0.5 1.5 2.5 1.0 2.0 1.5 2.0 6.0-1.5 1.5 Trace 8.0 0.1 0.2 Trace Balance 24.0 4.0 0.5 1.5 2.5 1.0 2.0 1.5 2.0-2.0 1.5 1.5 Trace 8.0 0.1 0.2 Trace Balance Sum 100 100

Formulation Example 2 and Comparative Formulation Example 2

Formulation Example 2 and Comparative Formulation Example 2 were prepared in the formulation of the foundation with the composition of Table 2 below.

Component (Content; Weight%) Formulation Example 2 Comparative Formulation Example 2 Decamethylcyclopentasiloxane (cyclomethicone) octylmethoxycinnamate cyclopentasiloxane / fiji.Fiji-19.19 Dimethicone Lauryl Fiji-9 Polydimethylsiloxyethyl Dimethicone Fiji-10 Dimethicone Distea Dimonium hectorite cyclomethicone / dimethiconevinyldimethiconecrosspolymer polymethylsilsesquioxane polymethylmethacrylate Titanium dioxide butyleneglycol sodium chloride disodium ethane on the dispersible titanium dioxide powder of Example 1 Ethyl Alcohol Iron Oxide (Black) Iron Oxide (Yellow) Iron Oxide (Red) Preservative, Fragrance Distilled Water 15.0 4.0 1.0 2.5 2.0 1.4 2.0 1.5 2.0 20.0-4.0 1.5 Trace 3.0 0.2 1.6 0.7 Trace Balance 15.0 4.0 1.0 2.5 2.0 1.4 2.0 1.5 2.0-7.0 4.0 1.5 Trace 3.0 0.2 1.6 0.7 Trace Balance Sum 100 100

[Test Example 2] Whitening reduction effect by the dispersion type titanium dioxide

In order to measure the turbidity of the cosmetic compositions of Formulation Example 1 and Comparative Formulation Example 1, 0.50 g of Formulation Example 1 and Comparative Formulation Example 1 were uniformly coated with an applicator on black artificial leather which can clearly check the clouding phenomenon. After the application, two minutes later, the photograph was taken and measured. The results are shown in Figures 3a to 3b below.

From the results of FIG. 3, it was confirmed that the turbidity effect of the cosmetic composition (FIG. 3A) of Formulation Example 1 according to the present invention was significantly reduced compared to the cosmetic composition (FIG. 3B) of Comparative Formulation Example 1.

Test Example 3 Effect of SPF Index Improvement by Dispersion Titanium Dioxide

Generally, titanium dioxide in powder form has a high hiding power due to a high refractive index of about 2.5 to 2.8 and a very small particle diameter, and when it is included in a makeup product, it has a sunscreen effect only by applying the skin. Thus, to confirm whether the titanium dioxide dispersed in the C12-15 alkyl benzoate according to the present invention exhibits the same effect as above, a transparent plastic tape (Transpore Tape; 3M, USA) attached to the prepared cast (cast), and then applying the cosmetic composition of Formulation Examples 1 and 2 and Comparative Formulation Examples 1 and 2 with a sample 2mg / cm ² , and then UV light with a UV meter (SPF 290 Analyzer) The blocking effect was measured. The results are shown in Table 3 and FIG. 4.

SPF Index (In Vitro) Formulation example One 12.68 2 18.20 Comparative formulation example One 10.31 2 14.50

From the results of Table 3 and FIG. 4, in the case of the formulation example according to the present invention, the UV blocking index is about 23.0% higher than the UV blocking index of the comparative formulation containing powdered titanium dioxide of the same content. I could confirm it.

[Formulation Examples 3 to 6 and Comparative Formulation Example 3]

The content of ethyl alcohol in the composition of Formulation Example 1 was 0.0 (Comparative Formulation Example 3), 3.0 (Formulation Example 3), 5.0 (Formulation Example 4), 7.0 (Formulation Example 5), 10.0 (Formulation Example 6) Except for changing to the formulation in the same manner as in Formulation Example 1 Formulation Examples 3 to 6 and Comparative Formulation Example 3 were prepared in the formulation of the makeup base.

[Test Example 4] Reduce the stickiness by using ethyl alcohol

Stickiness and freshness index for makeup cosmetics containing 0.0, 3.0, 5.0, 7.0, 8.0, 10.0% by weight of ethyl alcohol through 20 professional panel tests to compare the stickiness of the makeup bases of the above formulations and comparative formulations Of 20 Panols with complex skin with an average age of 27.2 years (1 point: low to 7 points: high intensity) Evaluated. The results are shown in Table 4 and FIG. 5.

Ethyl Alcohol Content (wt%) 0.0 3.0 5.0 7.0 8.0 10.0 Number of panels feeling sticky 19 17 12 5 One 0 The number of panels feel refreshed 0 3 8 15 19 20

From the results of Table 4 and FIG. 5, it was confirmed that the make-up base containing ethyl alcohol increased the stickiness index or the freshness index compared to Comparative Formulation Example 3 containing no ethyl alcohol.

As described above, the dispersible titanium dioxide according to the present invention is prepared by dispersing titanium dioxide in C12-15 alkyl benzoate together with a dispersant, resulting in the feeling of using titanium dioxide as a cosmetic. And it can overcome the disadvantages such as clouding phenomenon, when containing the dispersible titanium dioxide in the cosmetic composition by using ethyl alcohol to prevent sticking of the C12 ~ 15 alkylbenzoate low point of 8000cps or less Cosmetic compositions can also be prepared.

Claims (8)

A cosmetic composition comprising a dispersing titanium dioxide dispersed in C12-15 alkylbenzoate together with a dispersant. According to claim 1, wherein the dispersant is a cosmetic composition, characterized in that selected from the group consisting of aluminum stearate (aluminum stearat) and polyhydroxystearic acid (polyhydroxystearic acid). According to claim 1, wherein the composition is a cosmetic composition, characterized in that to reduce the cloudiness. The cosmetic composition according to claim 1, wherein the composition further contains ethyl alcohol in an amount of 5.0 to 10.0% by weight based on the total weight of the composition. The cosmetic composition according to claim 4, wherein the composition reduces the stickiness of the C12-15 alkylbenzoate. The cosmetic composition according to claim 4 or 5, wherein the composition has a low viscosity of 8000 cps or less. (1) adding alumina to the fine particle titanium dioxide, stirring and filtration to dry at 70 ~ 90 ℃ to prepare a first composite powder; And (2) introducing a dispersant into the powder and treating with C12-15 alkylbenzoate to produce dispersive titanium dioxide; The method of claim 7, wherein the dispersant is selected from the group consisting of aluminum stearate and polyhydroxystearic acid.

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