METHOD FOR PRODUCING LARGE-DIAMETER SiO2 POWDER AND COSMETIC COMPOSITION COMPRISING THE SAME

Abstract

SOLUTION: To provide a method for producing SiO2 powder having a particle size of 1.0 to 20.0 μm, comprising the steps of: adding CH3COOH to H2O and stirring the mixture; adding TEOS after the stirring and stirring the mixture; removing a synthetic mother liquor with a filter press and washing the mixture with H2O; and drying the mixture after the washing to obtain dry silica particle powder having a water content of 0.5% or less, and provide monodisperse, non-crystalline, spherical silica particle powder having a particle size of 1.0 to 20.0 μm and having a whiteness of 90 or more and a purity (%) of 99.9 or more.EFFECT: The large-diameter silica particles of the present invention are monodisperse particles with a similar particle size, having a smooth, spherical surface, cause no skin irritation, provide a soft feel, and are suitable for use as cosmetic scrub agents while also offering environmental benefits.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to large sized silica particles and cosmetic surface cleaning compositions containing same. [Background technology]

[0002] Cleansing cosmetics contain scrubbing agents that remove the stratum corneum through physical action. Fine plastics such as resins have been used as scrubbing agents, and these plastic particles are prone to absorbing chemicals such as pesticides, and because they are light, they are difficult to remove at sewage treatment plants. For this reason, they flow into rivers, oceans, ponds, and swamps, where they accumulate in fish and shellfish, which can have an impact on the human body.

[0003] Therefore, there is a need to develop a scrubbing material that reduces environmental pollution and is less irritating to the skin. Summary of the Invention [Problem to be solved by the invention]

[0004] The object of the present invention is to provide a method for producing a large-diameter SiO 2 which can be used as a scrub in a cosmetic composition. 2 The present invention provides a method for producing the powder and a cosmetic composition containing the powder as a scrub. [Means for solving the problem]

[0005] The present invention uses large-diameter SiO 2 The present invention provides a method for producing a powder.

[0006] The manufacturing method includes: H 2 O to CH 3 adding COOH and stirring; adding TEOS after the stirring and stirring; The synthetic mother liquor is removed by a filter press, and H 2 Washing with O; a step of drying the washed silica particles to obtain a dried silica particle powder having a moisture content of 0.5% or less; The present invention is characterized by comprising:

[0007] H as a solvent 2 O was used as a catalyst. 3 COOH was added and stirred. Then, TEOS was added and stirred. The longer the stirring time, the larger the particles produced. The synthesis mother liquor was removed by a filter press and H 2 The silica particles were washed with O. Thereafter, the silica particles were dried in a box dryer at 90° C. for 24 hours. The dried powdered silica particles were checked and sieved through a 100 mesh sieve to confirm that the moisture content was 0.5% or less.

[0008] The TEOS:CH 3 COOH:H 2 O is characterized in that it is reacted in a molar ratio of 1:4:4, respectively.

[0009] The particles produced by the above-mentioned production method have a particle size of 1.0 to 20.0 μm, a whiteness of 90 or more, a purity (%) of 99.9 or more, and are monodisperse, amorphous, and spherical.

[0010] Preferably, the particle size is characterized by being 2.0 to 10.0 μm.

[0011] On the other hand, the present invention provides a cosmetic composition containing the silica particles of the present invention as a scrub. The silica particles of the present invention have a particle size of 1.0 to 20.0 μm, a whiteness of 90 or more, a purity (%) of 99.9 or more, and are monodisperse, amorphous, and spherical. Since the surface is smooth, the flowability and oil absorption rate are good, and the cosmetic composition can be used as a scrub that is not irritating to the skin and is environmentally friendly. Effect of the Invention

[0012] The silica particles according to the present invention are white powders having a particle size of 1.0 to 20.0 μm, a whiteness of >90, and a purity (%) of >99.9.

[0013] In addition, the large-diameter silica particles of the present invention are monodisperse particles having a uniform particle diameter, and are spherical with a smooth surface. They are non-irritating to the skin, have a soft feel when used, and can be used as a cosmetic scrub. They are also environmentally friendly. [Brief description of the drawings]

[0014] [Figure 1] 1 is a SEM photograph of 3 μm-sized silica particles obtained in Example 1. [Diagram 2] 1 is a SEM photograph of 5 μm-sized silica particles obtained in Example 2. [Diagram 3] 1 is a particle size distribution graph of 3 μm-sized silica particles obtained in Example 1. [Figure 4] 1 is a particle size distribution graph of 5 μm-sized silica particles obtained in Example 2. [Diagram 5] 1 is an X-ray diffraction diagram of 3 μm-sized silica particles obtained by Example 1. [Figure 6] 1 is an X-ray diffraction diagram of 5 μm-sized silica particles obtained by Example 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Conventionally, silica particles have been produced using TEOS, water, and ethanol, but the present invention is characterized in that large-diameter silica particles are produced using TEOS, water, and acetic acid as raw materials.

[0016] The present invention will be described in more detail below with reference to examples. Example 1: 3 μm large diameter SiO 2 Manufacturing process TEOS:CH in the reaction tube 3 COOH:H 2The reaction was carried out in a ratio of 1 mole of O:4 moles:4 moles. 2 O was used as a catalyst. 3 COOH was added and stirred for 2 minutes. Then, TEOS was added and stirred for 2 minutes. The synthesis mother liquor was removed using a filter press, and H 2 The silica particles were washed with O. Thereafter, the silica particles were dried in a box dryer at 90° C. for 24 hours. The dried powdered silica particles were checked and sieved through a 100 mesh sieve to confirm that the moisture content was 0.5% or less.

[0017] Example 2: 5 μm large diameter SiO 2 Manufacturing process TEOS:CH in the reaction tube 3 COOH:H 2 The reaction was carried out in a ratio of O=1 mol:4 mol:4 mol.

[0018] H 2 O to CH 3 COOH was added and stirred for 4 minutes. Then, TEOS was added and stirred for 2 minutes. The synthesis mother liquor was removed using a filter press, and the mixture was stirred for 2 minutes. 2 The silica particles were washed with O. Thereafter, the silica particles were dried in a box dryer at 90° C. for 24 hours. The dried silica particles in a powder state were checked and sieved through a 100 mesh sieve to confirm that the moisture content was 0.5% or less.

[0019] Confirmation of physical properties of large-diameter silica particles The silica particles produced in Examples 1 and 2 were confirmed to have the following physical properties. 1. Spherical morphology As shown in Figs. 1 to 6, the particles were monodispersed spherical particles having almost the same particle size of 1.0 to 10 µm and had a smooth surface. 2. Safe amorphous silica The particles produced, as shown in Figures 1-6, were amorphous silica. 3. Extremely white powder The silica particles shown in Figs. 1 to 6 are characterized by being white powder with a whiteness index of >90 and a purity (%) of >99.9.

[0020] Example 3: Large diameter SiO 2 A cosmetic composition comprising A cosmetic composition was prepared as a facial cleanser containing 1 to 15% of the silica particles having the 3 μm and 5 μm sizes and the above physical properties prepared in Examples 1 and 2 as a scrub.

[0021] When the cosmetic composition was used to wash the face, the user experienced little skin irritation.

[0022] The silica particles of the present invention were used as scrubbing particles and mixed with cosmetic active ingredients as commonly used face washes.

[0023] Comparative Example 1: A facial cleanser containing a scrub of the same amount of plastic particles such as resin was prepared.

[0024] Skin spreadability / skin irritation / skin flexibility evaluation A usage test was conducted on the cosmetic composition of Example 3, and the results are shown in Table 1. After washing the face, 10 women were given a water-based emulsion by massaging the sample of the above Example evenly, and then the skin spreadability, skin irritation, and skin softness were evaluated on a 5-point scale, and the average values ​​were calculated.

[0025] The five-point scale is as follows: 1: Very dissatisfied 2: Unsatisfied 3: Normal 4: Satisfied 5: Very satisfied [Table 1] As described above, the cosmetic composition containing the particles of the present invention showed a satisfaction level that was above average compared to Comparative Example 1.

[0026] Although the present invention has been described above with reference to preferred embodiments thereof, those skilled in the art may modify the present invention in various ways without departing from the spirit of the present invention as set forth in the claims below.

Claims

1. H 2 O to CH 3 adding COOH and stirring; After the stirring, adding TEOS and stirring; The synthetic mother liquor was removed using a filter press, and H 2 Washing with O; a step of drying the washed silica particles to obtain a dried silica particle powder having a moisture content of 0.5% or less; SiO having a particle size of 1.0 to 20.0 μm 2 Method for producing powder.

2. TEOS:CH 3 COOH:H 2 SiO according to claim 1, characterized in that O is reacted in a molar ratio of 1:4:4, respectively. 2 Method for producing powder.

3. A monodisperse, amorphous, spherical silica particle powder having a particle size of 1.0 to 20.0 μm, a whiteness of 90 or more, and a purity (%) of 99.9 or more.

4. The silica particle powder according to claim 3, wherein the particle size is 3.0 to 5.0 μm.

5. A cosmetic composition comprising the silica particle powder according to claim 3.

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