KR101859920B1 - Cosmetic compostion comprising inorganic composition powder and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a composite inorganic powder comprising zeolite. More specifically, the present invention relates to a cosmetic composition containing the composite inorganic powder which includes a form of zinc oxide coated on a surface of zeolite. The cosmetic composition comprising the composite inorganic powder prevents deterioration of skin applicability such as stickiness and shine, lowers risks of skin irritation due to chemical reactions, and exhibits excellent ultraviolet blocking effects and moisturizing effects even when a small amount is contained in the cosmetic compositions.

Description

TECHNICAL FIELD [0001] The present invention relates to a cosmetic composition comprising a composite inorganic powder and a method for producing the same.

The present invention relates to a cosmetic composition comprising a composite inorganic powder and a process for producing the same. More specifically, the present invention relates to a cosmetic composition comprising a composite inorganic powder obtained by coating zinc oxide on the surface of a zeolite.

The sunlight can be divided into infrared rays, visible rays and ultraviolet rays. Among them, ultraviolet rays which can adversely affect the skin can be divided into three kinds according to the wavelength length in general as follows. Ultraviolet C (hereinafter referred to as UVC) having a wavelength of 200 to 290 nm is lost due to reflection or scattering due to not reaching the surface of the substrate while encountering the ozone layer. However, ultraviolet C having a wavelength of 290 to 320 nm (Hereinafter referred to as UVA) reaches the surface of the earth and has various effects on the skin of the human body.

UVB penetrates to the epidermis of skin to cause erythema, freckles and swelling. UVA penetrates into the dermis of the skin, causing melanin, wrinkles and skin cancer, and is known to cause skin aging and skin irritation. As the public awareness of UV protection products increases with the exposure to sunlight exposure, products with various Sun Protection Factors (SPF) and UV Protection Classes (UVA, PA) It is being released.

Such sunscreen products are broadly classified broadly into water-in-water and water-in-water or non-water-based formulations. In the case of underwater type emulsion products, there is a feeling of excellent skin application feeling provided by the water of the trauma, but there is a problem of persistence of effect due to sweat and water due to lack of water resistance. In case of water type product, But it has the advantage of good water resistance. In the case of non-aqueous UV-blocking formulations, it has the advantage of providing a unique feeling in addition to the advantages of good water resistance which is characteristic of water-in-oil type products.

Recently, there is an increasing demand for various types of ultraviolet screening agents because consumers are demanding ultraviolet screening products having a high level of ultraviolet screening ability but having a feeling of being tacky or inconvenient.

In order to obtain a high ultraviolet shielding effect of ultraviolet screening cosmetic, an organic ultraviolet screening agent or an inorganic ultraviolet screening component should be increased. However, if the ultraviolet screening cosmetic contains a large amount of organic ultraviolet screening agent, there is a risk of skin irritation due to chemical reaction, such as tackiness and shine.

On the other hand, when the inorganic UV blocking agent is increased, it becomes difficult to uniformly disperse the UV blocking value, so that the UV blocking value does not rise in proportion to the content of the inorganic UV blocking agent and the hardness increases. Therefore, it is impossible to unconditionally increase the inorganic sunscreen agent. Formulations containing a high content of an inorganic sunscreen agent may be developed into a stick or night (ointment) type, but are often limited to localized products rather than general-purpose products due to their unique feeling of use, which leads to restrictions on formulation development.

It is necessary to develop a cosmetic composition capable of solving the problems of the organic ultraviolet screening agent and utilizing the advantages of the inorganic ultraviolet screening agent.

(Patent Document 1) KR10-2014-0046507 A1

It is an object of the present invention to provide a cosmetic composition comprising a composite inorganic powder capable of preventing deterioration of skin coverage such as stickiness and shine and lowering the risk of skin irritation caused by chemical reaction and a method for producing the same.

Another object of the present invention is to provide a cosmetic composition comprising a composite inorganic powder in which zinc oxide is coated on the surface of zeolite, and which has excellent ultraviolet shielding effect and moisturizing effect even when a small amount of composite inorganic powder is contained, and a method for producing the same .

To achieve the above object, a cosmetic composition comprising a composite inorganic powder according to an embodiment of the present invention is a composite inorganic powder containing zeolite, and the composite inorganic powder includes a form in which zinc oxide is coated on the surface of the zeolite can do.

The composite inorganic powder is capable of blocking ultraviolet rays in the UVB and UVA regions.

The composite inorganic powder may include a form in which zinc oxide is formed inside the zeolite pores.

According to another aspect of the present invention, there is provided a method of manufacturing the composite inorganic powder, comprising: 1) removing distilled ionic material from the zeolite by adding distilled water and zeolite into the reaction vessel and heating the mixture; 2) cooling the heated zeolite; 3) washing the cooled zeolite in step 2) and drying; 4) placing the dried zeolite of step 3) in ethanol, adding a zinc precursor and sodium hydroxide (NaOH) and heating; 5) cooling after heating in step 4); 6) After the cooling in the step 5), a step of drying the zeolite coated with zinc oxide on the surface thereof with a centrifugal mill, followed by drying.

In the step 4), a surfactant may be further mixed.

The surfactant may be selected from the group consisting of PVA (poly vinylalcohol), PVP (polyvinyl pyrrolidone), CTAB (hexa decyl trimethyl ammonium bromide), and mixtures thereof.

The zeolite and zinc precursor in step 4) may be included in a weight ratio of 1: 1 to 2: 1.

The zinc precursor may be selected from the group consisting of Zinc Chloride, Zinc Acetate dihydrate, and mixtures thereof.

The step 5) is a cooling step for uniformly forming a zinc oxide layer on the surface of the zeolite. 5-1) The internal temperature of the reaction vessel is lowered to -10 ° C / h and the primary cooling is performed for 2 to 3 hours step; 5-2) after the primary cooling, lowering the temperature to -5 DEG C / h and secondarily cooling for 2 to 3 hours; And 5-3) after the secondary cooling, maintaining the external temperature of the reaction vessel at 25 DEG C and then naturally cooling for 2 to 4 hours.

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

According to an embodiment of the present invention, the cosmetic composition includes a composite inorganic powder, and the composite inorganic powder includes zeolite, and the surface of the zeolite may be coated with zinc oxide.

More specifically, the present invention relates to a cosmetic composition capable of exhibiting a moisturizing effect as well as an ultraviolet shielding effect, including a composite inorganic powder composed of a zeolite (Core layer) / ZnO (Shell layer).

The zeolite means a compound of silicon (Si) and aluminum (Al), and more specifically, it is an oxide of silicon and aluminum. In nature, it can be produced by a volcanic eruption, by contact with seawater, by chemical sedimentation in lakes or deep waters with high salinity, or by filling voids in volcanic rocks at the end during the eruption of basic volcanic rocks . That is, it is a compound mainly generated by a strong crustal change.

The chemical composition of the zeolite is M ⁿ _{x / n} Si _{1 - x} Al _x O ₂ .yH ₂ O. Here, M means an alkali metal and a +1 + ion, and is generally Li, Na, Ca, Ba, NH4 + or the like, but is not limited to the above examples. The structure of the zeolite may be composed of various structures such as Zeolite-A, Zeolite X or Y, and Zeolite L structure.

In general, the main characteristics of zeolites are the characteristics of adsorption, ion exchange and catalytic activity. In the conventional cosmetic composition, silver (Ag), copper (Cu), and zinc (Zn), which exhibit antibacterial characteristics, are bound to the alkali metal of the above chemical composition through anion exchange using the ion exchange property, It was mainly used for the interior.

On the other hand, the present invention includes a composite inorganic powder in which a zinc oxide coating layer is formed on the surface of zeolite by using the affinity of zeolite with other materials.

More specifically, in terms of the characteristics of zeolite, the cations present in the zeolite pores in aqueous solution are substituted with metal and organic cations, and have a property of strongly adsorbing polar substances in the zeolite crystal structure. In addition, zeolite fills water molecules in nano-sized pores. When heated at a high temperature, water evaporates inside, but its structure is not destroyed and has the property of combining with other substances.

By using the affinity of the zeolite with other materials, a composite inorganic powder having zinc oxide coated on the surface of the zeolite was prepared.

In the case of zinc zeolites in which cations of zeolites have been substituted with zinc, they have been conventionally included as antimicrobial substances for antimicrobial activity in cosmetic compositions. That is, although the antimicrobial activity is somewhat lower than that of the material prepared through the substitution reaction of zeolite with silver, it is very advantageous from the viewpoint of cost and zinc zeolite is mainly used as an antimicrobial substance. In the present invention, It is coated with zinc and used as an ultraviolet shielding material.

Generally, the UVC region of ultraviolet light disappears without reaching the surface of the earth, while the UVB and UVA regions reach the surface of the earth and can cause many problems when contacting the skin.

In order to prevent such problems, a variety of ultraviolet screening agents have been developed and used. However, when a large amount of organic ultraviolet screening agent is contained, skin sensitivity such as stickiness and shine is reduced, and the risk of skin irritation due to chemical reaction is a problem . In addition, the inorganic additives contained in the ultraviolet ray additive also have a problem in that their use is limited due to their functionality and the effect on the skin. Therefore, even if a small amount is contained, there is a need to exhibit an effective ultraviolet shielding effect.

The present invention relates to a composite inorganic powder capable of efficiently blocking ultraviolet rays in the UVB and UVA regions even when a small amount is contained in the ultraviolet screening agent, and further, the skin moisturizing effect is excellent.

The composite inorganic powder is characterized in that zinc oxide is coated on the surface of the zeolite. In addition, the composite inorganic powder may further include a form in which zinc oxide is formed inside the zeolite pores. That is, a zinc oxide layer is formed on the surface of the zeolite, and zinc oxide is also formed in the pores. More specifically, when zinc oxide is coated on the surface of the zeolite, when an emulsifying agent is further mixed, an ion exchange reaction occurs in the zeolite pores, and zinc oxide may be formed inside the pores.

As described above, in the case of the composite inorganic powder in which a zinc oxide layer is formed on the surface of the zeolite, the ultraviolet ray shielding effect is excellent. In addition, when zinc oxide is formed in the pores through the ion exchange reaction in the zeolite pores , The ultraviolet shielding effect further increases.

The emulsifier is more particularly, glyceryl monostearate, lecithin, sorbitan monostearate, sorbitan sesquioleate up rate, sorbitan oleate, sorbitan palmitate, C _{14- 22} alcohol / C _{12- 20} alkyl glucosides, Glyceryl stearate, PEG-4 oleate, sorbitan olivate, polyglyceryl-3 methyl glucose distearate, PEG-4 stearate / glyceryl stearate, PPEG-10 dimethicone, PEG-9 methyl ether dimethicone, PEG-3 dimethicone and PEG-11 methyl ether dimethicone, PEG / PPG-20/20 butyl ether dimethicone and PEG / PPG- 20 dimethicone. ≪ / RTI >

According to another embodiment of the present invention, there is provided a method for manufacturing the composite inorganic powder, comprising the steps of: 1) removing distilled ionic material from the inside of the zeolite by adding distilled water and zeolite into the reaction vessel and heating it; 2) cooling the heated zeolite; 3) washing the cooled zeolite in step 2) and drying; 4) placing the dried zeolite of step 3) in ethanol, adding a zinc precursor and sodium hydroxide (NaOH) and heating; 5) cooling after heating in step 4); And 6) cooling the zeolite coated on the surface of the zeolite surface with a centrifugal mill, followed by drying, after cooling in step 5).

In the step 1), distilled water and zeolite are placed in a reaction vessel and heated to remove a substance remaining in the interior of the zeolite. More specifically, when the zeolite is heated at a high temperature, the moisture inside the zeolite is evaporated, but the structure is not destroyed and the material remaining in the zeolite is removed. The step 1) is carried out by stirring at 150 to 200 ° C for 1 to 3 hours.

After the step 1), the zeolite heated in the step 2) is cooled, and thereafter, the water is washed in the step 3), and then the step of drying in an oven is carried out. The cooled zeolite is washed 2 to 3 times and then dried in an oven at 60 to 80 ° C.

Thereafter, a process for forming a zinc oxide coating layer on the surface of the zeolite proceeds. More specifically, the dried zeolite is put into ethanol, and a zinc precursor and sodium hydroxide (NaOH) are added and heated. Ethanol is placed in the reaction vessel, and dry zeolite, zinc precursor and sodium hydroxide are added, mixed and heated to form a zinc oxide coating layer on the surface of the zeolite.

The zinc precursor is selected from the group consisting of Zinc Chloride, Zinc Acetate dihydrate, and mixtures thereof.

The zeolite and zinc precursor in the step 4) may be contained in a weight ratio of 1: 1 to 2: 1, more specifically, in a weight ratio of 1: 1 to 1.5: 1. By mixing in the weight ratio within the above range, a zinc oxide coating layer can be formed on the surface of the zeolite with a uniform thickness. That is, when the zinc precursor is contained in an excessively small amount, a zeolite having no zinc oxide coating layer may be formed, resulting in a problem of low yield. When the zinc precursor is excessively contained, There arises a problem in that it is not formed.

In the step 4), the solvent thermal reaction is carried out at 170 to 200 ° C for 1 to 4 hours.

The step 4) preferably comprises: 4-1) mixing ethanol, dried zeolite, zinc precursor and sodium hydroxide in a reaction vessel and conducting a solvent thermal reaction at 170 ° C to 200 ° C for 0.5 to 1 hour; And

4-2) After the step 4-1), the method further includes a step of conducting a solvent thermal reaction at 170 ° C to 200 ° C for 0.5 to 3 hours, further including a zinc precursor.

The step 4-1) may include a zeolite and a zinc precursor in a weight ratio of 1: 0.1 to 1: 0.2. Thereafter, in step 4-2), the remaining zinc precursor is further added and the reaction proceeds.

The step 4-1) is for forming a zinc oxide seed to form a uniform zinc precursor on the surface of the zeolite. In order to form a zinc oxide coating layer on the surface of the zeolite, the zeolite and the zinc precursor are mixed at a ratio of 1: 1: 2, the reaction can be carried out. However, in this case, a problem arises in that the production yield is inferior due to the production of a zeolite in which some uneven zinc oxide coating layers are formed.

In order to prevent such problems, zinc oxide is formed on the surface of the zeolite in the first step by separating the zinc precursor mixing process into two steps and mixing the zinc precursor in the reaction of the zeolite and the zinc precursor, By mixing a large amount of zinc precursor in the subsequent step, a uniform zinc oxide coating layer can be formed by the zinc oxide layer formed on the surface of the zeolite.

5) cooling step for uniformly forming a zinc oxide layer on the surface of the zeolite; 5-1) cooling the inner temperature of the reaction vessel to -10 ° C gt; / h < / RTI > for 2 to 3 hours; 5-2) after the primary cooling, lowering the temperature to -5 DEG C / h and secondarily cooling for 2 to 3 hours; And 5-3) after the secondary cooling, maintaining the external temperature of the reaction vessel at 25 DEG C and then naturally cooling for 2 to 4 hours.

In order to form a uniform zinc oxide coating layer on the surface of the zeolite, the zinc precursor is mixed by dividing the zinc oxide precursor in the above step 4) to form a zinc oxide coating layer. Thereafter, the cooling temperature is finely adjusted in the cooling step, Through the process, a stable nuclear arrangement can be achieved.

Through this cooling process, a uniform zinc oxide coating layer can be formed on the surface of the zeolite, and the adhesion strength of the zinc oxide can be improved.

After the cooling step in the step 5), a drying step may be performed after the water washing step using a centrifugal separator to produce a composite inorganic powder.

The step 4) may include an additive selected from the group consisting of surfactants, emulsifiers, and mixtures thereof.

The surfactant may be selected from the group consisting of PVA (poly vinylalcohol), PVP (polyvinyl pyrrolidone), CTAB (hexa decyl trimethyl ammonium bromide), and mixtures thereof, but the present invention is not limited thereto. More specifically, the surfactant may be included when using zinc acetate dihydrate as the zinc precursor.

When zinc acetate dihydrate is used as a zinc precursor, zinc oxide may grow into a long rod-shaped rod state, and the surfactant may be added together to control it.

The emulsifiers are glyceryl monostearate, lecithin, sorbitan monostearate, sorbitan sesquioleate up rate, sorbitan oleate, sorbitan palmitate, C _{14- 22} alcohol / C _12-20 alkyl glucosides, cetearyl alcohol / Cetearyl glucoside, polysorbate 60, PEG-100 stearate / glyceryl stearate, PEG-4 oleate, sorbitan olivate, polyglyceryl-3 methyl glucose distearate, PEG-8 dimethicone, PEG-10 dimethicone, PEG-9 methyl ether dimethicone, PEG-3 dimethicone and PEG-11 methyl ether dimethicone, PEG / PPG-20/20 butyl ether dimethicone and PEG / PPG- , But the present invention is not limited to the above examples.

The composition of the present invention may be formulated as an external preparation for skin, in particular as a cosmetic composition, and may be formulated containing a cosmetically or dermatologically acceptable medium or base. In addition, the composition of the present invention may be provided in any form suitable for topical application, for example, as a solution, an emulsion obtained by dispersing an oil phase in water phase, an emulsion obtained by dispersing water phase in water phase, a suspension, a solid, a gel, Pastes, foams, or aerosol compositions. Compositions of such formulations may be prepared according to conventional methods in the art.

In addition, the composition according to the present invention may contain, in addition to the above-mentioned materials, other ingredients capable of synergistic effect on the main effect, without impairing the main effect. In addition, the composition according to the present invention may further comprise a moisturizing agent, an emollient agent, an ultraviolet absorber, an antiseptic, a bactericide, an antioxidant, a pH adjuster, an organic and inorganic pigment, a fragrance, a cold agent or a limiting agent. The compounding amount of the above components can be easily selected by those skilled in the art within a range not to impair the object and effect of the present invention, and the amount thereof may be 0.01 to 5% by weight, specifically 0.01 to 3% by weight based on the total weight of the composition .

The present invention is a cosmetic composition comprising a composite inorganic powder, which can prevent deterioration of skin coverage such as stickiness and shine, and reduce the risk of skin irritation caused by chemical reaction.

Further, even when a small amount of the composite inorganic powder is contained in the cosmetic composition, it is excellent in ultraviolet blocking effect and moisturizing effect.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an XRD pattern for a composite inorganic powder according to one embodiment of the present invention.
2 is a SEM photograph of the composite inorganic powder according to one embodiment of the present invention.
Figure 3 is a UV absorption spectrum for a composite inorganic powder according to one embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

[ Manufacturing example  1: Combined Weapon Powdery  Produce]

Example  One

600 g of distilled water was added to 1 L of the reaction vessel, and 70 g of zeolite was added thereto. The mixture was stirred at an internal temperature of 150 ° C. for 2 hours to dissolve and remove ionic substances remaining in the zeolite. Thereafter, the zeolite was cooled, washed with water for about 2-3 times, and dried in a vacuum oven at 70 ° C.

600 g of ethanol was added to 1 L of the reaction vessel, and 25 g of zinc chloride and 80 g of NaOH were added to 50 g of dried zeolite, and the solvent thermal reaction was carried out at 180 캜 for 2 hours. At this time, the internal pressure rose to 18 bar.

Thereafter, to maintain uniform ZnO formation and growth on the surface of the zeolite, the external temperature was maintained at 25 ° C, followed by natural cooling for 4 hours. After the cooling process, the mixture was washed five times using a shim separator, followed by drying to obtain a composite inorganic powder.

Example  2

The same procedure as in Example 1 was carried out except that 25 g of dried zeolite and zinc chloride in Example 1 were added.

Example  3

400 g of distilled water was added to 1 L of the reaction vessel, 30 g of zeolite was added, and the mixture was stirred at an internal temperature of 200 ° C for 2 hours to dissolve and remove ionic substances remaining in the zeolite. Thereafter, the zeolite was cooled, washed with water for about 2-3 times, and dried in a vacuum oven at 70 ° C.

600 g of ethanol was added to 1 L of the reaction vessel, 44 g of zinc acetate dihydrate, 80 g of NaOH and 1 g of poly vinylalcohol were added to 25 g of the dried zeolite, and the solvent thermal reaction was carried out at 180 DEG C for 2 hours. At this time, the internal pressure rose to 18 bar.

Thereafter, to maintain uniform ZnO formation and growth on the surface of the zeolite, the external temperature was maintained at 25 ° C, followed by natural cooling for 4 hours. After the cooling process, the mixture was washed five times using a shim separator, followed by drying to obtain a composite inorganic powder.

[ Experimental Example  1: Combined Weapon Powdery XRD  Pattern analysis result]

Through the XRD pattern analysis, the composite inorganic powders of Examples 1 to 3 were analyzed. Although the production method of the composite inorganic powder was partially different, the final composite inorganic powder is for forming a zinc oxide coating layer on the surface of the zeolite.

In order to form the zinc oxide coating layer in Examples 1 to 3, the zinc precursor was added in different amounts, and the XRD pattern was as shown in Fig.

1, it was confirmed that the characteristic peaks of zinc oxide and zeolite appeared in Examples 2 and 3. In the case of Example 1, the zinc oxide coating layer was not uniformly formed, and the characteristic peaks of zinc oxide and zeolite were not confirmed.

[ Experimental Example  2: Combined Weapon Powdery SEM  Measurement result]

In order to form a zinc oxide coating layer on the surface of the zeolite, the zinc precursors in Examples 1 to 3 were prepared in different amounts. In Experimental Example 1, regardless of the content of the zinc precursor, it was confirmed that all the same zeolite / zinc oxide composite particles were observed in view of the same peak.

In order to confirm whether a uniform coating layer was formed, SEM photographs of the zeolite having no zinc oxide coating layer and SEM photographs of the composite inorganic powders of Examples 1 to 3 were measured and the results were examined.

According to Fig. 2, the zeolite is the same as (a). (b) is a composite inorganic powder solid of Example 2, (c) is a composite inorganic powder solid of Example 1, and (d) is a composite inorganic powder of Example 3.

In the case of Example 2, it can be confirmed that a zinc oxide coating layer is uniformly formed on the surface of the zeolite. In the case of Example 1, it can be confirmed that the zinc oxide coating layer is uniformly formed. On the other hand, in the case of Example 3, it can be confirmed that zinc oxide protrusions (hron) are formed, and it can be confirmed that a non-uniform coating layer is formed.

[ Experimental Example  3: Combined Weapon Powdery  UV blocking effect]

The degree of ultraviolet absorption of the composite inorganic powders of Examples 1 to 3 was measured using an ultraviolet absorption spectrum measuring apparatus.

3 (a) is a zeolite, (b) is a composite inorganic powder aggregate of Example 1, (c) is a composite inorganic powder aggregate of Example 2, and (d) is a composite inorganic powder of Example 3.

According to FIG. 3, there is a problem in that the ultraviolet blocking effect of the UVB region is insufficient in case of (a) and (b), and in the case of (c) and (d), the ultraviolet blocking effect of the UVB region is confirmed.

[ Manufacturing example  2: Composite weapon according to manufacturing process Powdery  Produce]

Example  4

600 g of distilled water was added to 1 L of the reaction vessel, and 70 g of zeolite was added thereto. The mixture was stirred at an internal temperature of 150 ° C. for 2 hours to dissolve and remove ionic substances remaining in the zeolite. Thereafter, the zeolite was cooled, washed with water for about 2-3 times, and dried in a vacuum oven at 70 ° C.

600 g of ethanol was added to 1 L of the reaction vessel, 5 g of zinc chloride and 80 g of NaOH were added to 50 g of dried zeolite, and the solvent thermal reaction was carried out at 180 ° C for 1 hour. Then, 20 g of zinc chloride was added and the solvent thermal reaction was carried out at 180 ° C. for 1 hour. At this time, the internal pressure rose to 18 bar.

Thereafter, to maintain uniform ZnO formation and growth on the surface of the zeolite, the external temperature was maintained at 25 ° C, followed by natural cooling for 4 hours. After the cooling process, the mixture was washed five times using a shim separator, followed by drying to obtain a composite inorganic powder.

Example  5

600 g of distilled water was added to 1 L of the reaction vessel, and 70 g of zeolite was added thereto. The mixture was stirred at an internal temperature of 150 ° C. for 2 hours to dissolve and remove ionic substances remaining in the zeolite. Thereafter, the zeolite was cooled, washed with water for about 2-3 times, and dried in a vacuum oven at 70 ° C.

600 g of ethanol was added to 1 L of the reaction vessel, 5 g of zinc acetate dihydrate, 80 g of NaOH and 1 g of poly vinylalcohol were added to 25 g of the dried zeolite, and the solvent thermal reaction was carried out at 180 ° C for 1 hour. Then, 20 g of zinc acetate dihydrate was added, and the solvent thermal reaction was carried out at 180 ° C. for 1 hour. At this time, the internal pressure rose to 18 bar.

Thereafter, to maintain uniform ZnO formation and growth on the surface of the zeolite, the external temperature was maintained at 25 ° C, followed by natural cooling for 4 hours. After the cooling process, the mixture was washed five times using a shim separator, followed by drying to obtain a composite inorganic powder.

Example  6

The cooling process is lowered to -10 DEG C / h for 2 hours, followed by primary cooling, cooling down to -5 DEG C / h for 2 hours after the primary cooling, secondary cooling, The same procedure as in Example 4 was carried out except that the external temperature of the container was kept at 25 캜 and then naturally cooled for 4 hours.

Example  7

The cooling process was lowered to -10 ° C / h for 4 hours, cooled, and then the same as in Example 4, except that the external temperature of the reaction vessel was maintained at 25 ° C, followed by natural cooling for 4 hours.

Example  8

The cooling process was lowered to -5 ° C / h for 4 hours, cooled, and then, the external temperature of the reaction vessel was maintained at 25 ° C, followed by spontaneous cooling for 4 hours.

[ Experimental Example  4: Combined Weapon Powdery  Sensory Test]

The nutritional lotion was prepared using the composite inorganic powders of Examples 1 to 8, and the sensory test was carried out. The nutritional lotion was prepared in the following manner.

A mixture of 5% by weight of composite inorganic powder, 1.7% by weight of sitosterol, 1.5% by weight of polyglyceryl 2-oleate, 0.7% by weight of ceramide, 1.2% by weight of cetearate-4, 1.5% by weight of cholesterol, 0.4% by weight of dicetyl phosphate, 5.0 wt%, sunflower oil 10 wt%, carboxyvinyl polymer 0.2 wt%, xanthan gum 0.3 wt%, and the remaining purified water. For comparison of the sensory test, a nutrition lotion without the composite inorganic powder was used in the above-mentioned nutrition lotion.

Twenty women aged 20 to 35 years were selected as the subject to be tested. Nutritious lotions containing the composite inorganic powders of Examples 1 to 8 and the nutrition lotion containing no composite inorganic powders were used for 5 days on both balls, respectively. Skin irritation, and moisturisation, and were evaluated as 1 point very bad, 2 points worse, 3 points normal, 4 points good, 5 points very good, and the evaluation results were expressed as average scores. More specific results are shown in Table 1 below.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Skin irritation 2.2 3 1.2 4 3.75 4.2 2.5 1.5 Skin moisturizing 1.75 3 2.2 4 4.2 4.5 2 2.5

According to the above Table 1, Example 1 and Example 2 were evaluated as having skin irritation in the case of women with sensitive skin although the skin irritation was not severe. In the case of Example 3 in which a non-uniform coating layer was formed, skin irritation was observed in addition to a woman with sensitive skin.

On the other hand, in Examples 4 to 6, it was confirmed that skin irritation and skin moisturizing property were generally evaluated to be excellent.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

Claims (9)

A composite inorganic powder comprising zeolite,
The composite inorganic powder is formed by coating zinc oxide on the surface of zeolite,
The composite inorganic powder is capable of blocking ultraviolet rays in the UVB and UVA regions,
The composite inorganic powder is a form in which zinc oxide is formed inside the zeolite pores,
When zinc oxide is coated on the surface of the zeolite, an emulsifying agent is further mixed to effect ion exchange reaction in the zeolite pores, and zinc oxide is formed inside the pores,
The emulsifying agent may be selected from the group consisting of glyceryl stearate, lecithin, sorbitan stearate, sorbitan sesquioleate, sorbitan oleate, sorbitan palmitate, _C14-22 alcohol / _C12-20 alkyl glucoside, cetearyl alcohol / Cetearyl glucoside, polysorbate 60, PEG-100 stearate / glyceryl stearate, PEG-4 oleate, sorbitan olivate, polyglyceryl-3 methyl glucose distearate, PEG-8 dimethicone, PEG-10 dimethicone, PEG-9 methyl ether dimethicone, PEG-3 dimethicone and PEG-11 methyl ether dimethicone, PEG / PPG-20/20 butyl ether dimethicone and PEG / PPG- At least one selected from the group consisting of
The process for forming the zinc oxide coating layer on the surface of the zeolite is characterized in that a dry zeolite is put in ethanol and a zinc precursor and sodium hydroxide (NaOH) are added and heated to form a zinc oxide coating layer on the surface of the zeolite,
The dried zeolite is put into ethanol, and a zinc precursor and sodium hydroxide (NaOH) are added. When heating, ethanol, dried zeolite, zinc precursor and sodium hydroxide are mixed in the reaction vessel and heated at 170 ° C to 200 ° C for 0.5 to 1 hour After the solvent thermal reaction is carried out, the solvent thermal reaction is further carried out at 170 ° C to 200 ° C for 0.5 to 3 hours, further including a zinc precursor,
Wherein the zinc precursor is selected from the group consisting of zinc chloride, zinc acetic acid dihydrate, and mixtures thereof,
Zeolite and zinc precursor are included in a weight ratio of 1: 1 to 2: 1,
Further comprising an additive selected from the group consisting of a surfactant, an emulsifying agent and a mixture thereof in the step of forming a zinc oxide coating layer on the surface of the zeolite,
Wherein the surfactant comprises a composite inorganic powder selected from the group consisting of PVA (poly vinylalcohol), PVP (polyvinyl pyrrolidone), CTAB (hexa decyl trimethyl ammonium bromide), and mixtures thereof.
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