KR101768772B1 - Cosmetic composition comprising rodlike zinc oxide - Google Patents

Cosmetic composition comprising rodlike zinc oxide Download PDF

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Publication number
KR101768772B1
KR101768772B1 KR1020150126596A KR20150126596A KR101768772B1 KR 101768772 B1 KR101768772 B1 KR 101768772B1 KR 1020150126596 A KR1020150126596 A KR 1020150126596A KR 20150126596 A KR20150126596 A KR 20150126596A KR 101768772 B1 KR101768772 B1 KR 101768772B1
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South Korea
Prior art keywords
zinc oxide
reactor
rod
rpm
cosmetic composition
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KR1020150126596A
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Korean (ko)
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KR20170029349A (en
Inventor
김성일
이성호
박장호
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선진뷰티사이언스(주)
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A61K8/27—Zinc; Compounds thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0216—Solid or semisolid forms
    • A61K8/0229—Sticks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
    • A61Q17/04—Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00—Preparations for care of the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Birds (AREA)
  • Epidemiology (AREA)
  • Dermatology (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Cosmetics (AREA)

Abstract

The present invention relates to a cosmetic composition comprising bar-shaped zinc oxide. In particular, the present invention relates to a cosmetic composition comprising bar-shaped zinc oxide which is excellent in ultraviolet shielding efficacy, storage property, feeling of use and transparency to visible light, A cosmetic composition and a method for producing a rod-shaped zinc oxide capable of mass-producing the rod-shaped zinc oxide.

Description

[0001] Cosmetic composition comprising rodlike zinc oxide [

The present invention relates to a cosmetic composition comprising a bar-shaped zinc oxide, and more particularly to a cosmetic composition comprising a bar-shaped zinc oxide which is excellent in ultraviolet shielding efficacy, shelf-life, feeling of use and transparency to visible light, And a method for producing a rod-shaped zinc oxide capable of mass-producing the rod-shaped zinc oxide.

Recently, as the ultraviolet ray irradiation amount of the surface due to destruction of the ozone layer is increased, the market of products which are mainly used for ultraviolet ray blocking is growing every year.

Spherical zinc oxide (ZnO) is used as a product having existing ultraviolet shielding effect. However, the following problems have been raised in the spherical zinc oxide, and there is a continuing demand for a product capable of improving the zinc oxide.

1. Spherical zinc oxide causes agglomeration phenomenon such as clustering of grapes when used, resulting in poor feeling of use. In particular, storage stability is poor and aggregation phenomenon occurs more frequently when used over time.

2. Spherical zinc oxide requires a large amount of zinc oxide per unit area in order to obtain ultraviolet shielding effect.

3. Spherical zinc oxide is not transparent to visible light and it is difficult to realize a high-quality sunscreen.

DISCLOSURE OF THE INVENTION In order to solve the above problems, it is an object of the present invention to provide a cosmetic composition containing bar-shaped zinc oxide which is excellent in ultraviolet shielding efficacy, storage property, feeling of use and permeability to visible light, do.

It is another object of the present invention to provide a method for producing a rod-shaped zinc oxide capable of mass-producing the rod-shaped zinc oxide.

It is another object of the present invention to provide a rod-shaped zinc oxide produced by the aforementioned method for producing a rod-shaped zinc oxide.

According to an aspect of the present invention,

Wherein the cosmetic composition contains zinc oxide as an active ingredient having an aspect ratio (Aspcet ratio) of 3.5 to 8 as an active ingredient.

In addition, the present invention provides a process for producing ZnO, comprising the steps of mixing water and ZnO in a reactor, and then adding HCl to dissolve ZnO;

A second step of adding NaOH to the reactor of the first stage;

A third step of slowly accelerating and stirring the reactor of the second stage in which the NaOH is charged in a stationary state so as to take a time of at least 50 seconds until the stirring speed reaches the final 300 to 400 rpm; And

A fourth step of heating the reactor of the third step;

The present invention provides a method for producing a rod-shaped zinc oxide.

The present invention also provides the rod-shaped zinc oxide produced by the above-mentioned method for producing zinc oxide.

The cosmetic composition comprising the rod-shaped zinc oxide of the present invention is superior to the conventional cosmetic composition containing zinc oxide and has excellent ultraviolet shielding efficacy, storage stability, feeling of use, and transparency to visible light, The process for producing the rod-shaped zinc oxide according to the invention is suitable for producing rod-shaped zinc oxide in large quantities.

FIG. 1 is a schematic view showing a second step of introducing NaOH into a first stage reactor in a method of producing zinc oxide in the form of a rod according to an embodiment of the present invention.
2 is a photograph of a bar-shaped zinc oxide produced according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail.

The cosmetic composition of the present invention is characterized by containing a bar-shaped zinc oxide having an aspect ratio (Aspcet ratio) of 3.5 to 8 as an active ingredient. When the aspect ratio of the bar-shaped zinc oxide is within the above-mentioned range, it can have an excellent ultraviolet shielding effect, feeling on use, shelf life, and transparency to visible light. In the present invention, the bar size means a rod in the shape of a cylinder.

Preferably, the rod-shaped zinc oxide may have an Aspcet ratio of 5 to 7. In this case, the cosmetic composition may have better ultraviolet shielding effect, feeling and storage property.

The length of the rod-shaped zinc oxide is preferably 200 to 500 nm, and the horizontal diameter is preferably 30 to 80 nm. Within the above range, the cosmetic composition may have better ultraviolet shielding effect, shelf life, and feeling of use.

Also, the rod-shaped zinc oxide may be coated with an organosilane, and the organosilane may be an alkylsilane. In this case, the cosmetic composition can have more excellent storage stability and feel.

In the cosmetic composition of the present invention, the components other than the above-mentioned bar-shaped zinc oxide may be used in known cosmetic compositions. The cosmetic composition of the present invention may be formulated into cream, lotion, And it can be used as a cosmetic material for various purposes, and is preferably used as a sunscreen agent.

In the cosmetic composition of the present invention, the content of the bar-shaped zinc oxide may be optionally controlled, and may be specifically included in the cosmetic composition in an amount of 1 to 50% by weight.

The present invention also provides a method for producing a rod-shaped zinc oxide, characterized in that the method for producing the rod-shaped zinc oxide comprises the following steps.

Mixing water and ZnO in a reactor, and then adding HCl to dissolve ZnO;

A second step of adding NaOH to the reactor of the first stage;

A third step of slowly accelerating and stirring the reactor of the second stage in which the NaOH is charged in a stationary state so as to take a time of at least 50 seconds until the stirring speed reaches the final 300 to 400 rpm; And

And a fourth step of heating the reactor of the third step.

Step 1

After mixing water and ZnO in the reactor, HCl is added to dissolve ZnO. Amorphous ZnO is preferably used as the ZnO, and ZnCl 2 is produced in the reactor through the first step.

Step 2

The second step is the step of adding NaOH to the reactor of the first step. The NaOH introduced into the reactor is divided into a solution and a layer in the reactor of the first stage because the specific gravity thereof is lower than that in the reactor of the first stage. Preferably, the introduction of NaOH in the second step is such that NaOH does not mix with the solution in the reactor in the first step so that the NaOH is introduced into the reactor through the wall surface of the reactor as in Fig. In this case, the productivity of the bar-shaped zinc oxide can be increased.

Step 3

The third step is a step of slowly accelerating and stirring the reactor of the second stage in which NaOH is charged in a stationary state so as to take a time of at least 50 seconds until the stirring speed reaches the final 300 to 400 rpm. After sufficient agitation at the final agitation speed, ZnCl 2 and 2NaOH react to form Zn (OH) 2 through this step. The stirring time may be 50 to 80 占 폚 for a total of 10 to 15 minutes. Through this step, a rod shape is formed.

In this step, when the acceleration time is rapidly accelerated by only 50 seconds, spherical zinc oxide is produced and no rod-shaped zinc oxide having an aspect ratio (Aspcet ratio) of 3.5 to 8 is produced. Preferably, the three-stage reactor is slowly stirred and agitated for at least 20 seconds until the stirring speed reaches 100 rpm in a stationary state. In this case, it is preferable that the reactor having an Aspcet ratio of 3.5 to 8 Zinc oxide increases productivity. More preferably, the reactor of step 3 is slowly accelerated and stirred so as to take at least 10 seconds from the standstill to a stirring speed of 50 rpm. In this case, the Aspcet ratio is preferably 5 to 7 A large proportion of bar zinc oxide is produced. Most preferably, the reactor of step 3 is slowly accelerated so that it takes at least 10 seconds, preferably 10 to 15 seconds, until the stirring speed reaches 50 rpm in the stationary state, and when the stirring speed becomes 100 rpm at 50 rpm Slowly for at least 10 seconds, preferably 10 to 15 seconds, and slowly accelerates to take at least 10 seconds, preferably 10 to 15 seconds, until the stirring speed reaches 150 rpm at 100 rpm, It is preferable to accelerate slowly so that it takes 10 to 15 seconds to accelerate the speed to reach the final stirring speed of 300 to 400 rpm for every 50 rpm acceleration. More preferably, it is preferable to accelerate slowly so that it takes 10 to 15 seconds for every stirring speed of 50 rpm. In this case, the rod-shaped zinc oxide having an Aspcet ratio of 5 to 7 and a length of 200 to 500 nm can be produced with high productivity at a high ratio.

Step 4

The fourth step is to heat the reactor of the third step. The heating may be performed at 90 to 100 ° C for 8 to 20 hours after decelerating the stirring speed to 200 to 300 rpm. In the fourth step, dehydration is performed in Zn (OH) 2 in the reactor to produce ZnO.

In addition, the method of manufacturing the rod-shaped zinc oxide of the present invention may further include an organosilane coating step of coring the organosilane to the rod-shaped zinc oxide. The organosilane coating may be an organic silane coating method applied to known cosmetic powders. Examples of the organosilane may include alkylsilane. As a specific example, it is possible to coat the organosilane with isopropyl alcohol and octyltriethoxysilane for the organosilane coating in the reactor, and between the third and fourth steps, isopropyl alcohol and octyltriethoxysilane Or an organic silane coating may be carried out by introducing isopropyl alcohol and octyltriethoxysilane after the fourth step.

The bar-shaped zinc oxide in the reactor having undergone the above process is then washed, dehydrated and dried to separate the bar-shaped zinc oxide. The washing, dehydration and drying can be performed by a known method which is applied to the separation of zinc oxide powders, and the methods used in the method of manufacturing spherical zinc oxide can be applied mutatis mutandis.

The rod-shaped zinc oxide produced according to the present invention has a columnar rod-like shape and has an aspect ratio Aspcet ratio of 3.5 to 8 suitable for application to cosmetics. The rod-shaped zinc oxide has a length of 200 To 500 nm, and a transverse diameter of 30 to 80 nm. The surface may further be coated with an organosilane. The zinc oxide of the present invention is superior to conventional spherical zinc oxide when applied to cosmetics, and thus has excellent ultraviolet shielding effect, shelf life, feeling of use, and transparency to visible light, thereby realizing high quality cosmetics.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the scope of the present invention is not limited to the following examples.

Example  One

1890 g of water, 180 g of amorphous zinc oxide and 462 g of HCl (35% by weight dilution) were mixed in the reactor and stirred to dissolve the amorphous zinc oxide. 360 g of NaOH (diluted to 50% by weight) was added to the reactor through the reactor wall as shown in FIG. After the addition of NaOH, the reactor was slowly accelerated so as to take 10 seconds until the stirring speed became 50 rpm in a stationary state, slowly accelerated so as to take 10 seconds until the stirring speed became 100 rpm at 50 rpm, Was slowly accelerated so as to take 10 seconds for each 50 rpm acceleration to reach a final stirring speed of 350 rpm, and the mixture was stirred at 350 rpm for 10 minutes. 39 g of isopropyl alcohol and 9 g of octyltriethoxysilane were fed into the reactor, and the reaction was allowed to proceed for 10 hours at a stirrer speed of 250 rpm at a temperature of 95 ° C, followed by washing, dehydration and drying, A large zinc oxide was produced. The prepared rod-shaped zinc oxide had a shape with an Aspcet ratio of 5 to 7, and the rod-shaped zinc oxide had a length of 200 to 500 nm and a transverse diameter of 30 to 80 nm, as shown in Fig.

Comparative Example 1

The same procedure as in Example 1 was carried out except that zinc oxide was prepared in the same manner as in Example 1 except that the reactor was rapidly accelerated so as to take 10 seconds until the stirring speed became 350 rpm in a stationary state after the addition of NaOH To prepare zinc oxide. The prepared zinc oxide was only spherical zinc oxide.

Example 2

In Example 1, 20.0 parts by weight of the rod-shaped zinc oxide powder, 3.0 parts by weight of zinc stearate, 15.0 parts by weight of alkylsilane surface treated mica (SUNMICA-AS, manufactured by Shinjin Chemical Co., Ltd.) 13.0 parts by weight of a surfactant (manufactured by Shin-Etsu Chemical Co., Ltd.), 44.0 parts by weight of alkylsilane surface-treated talc (SUNTALC-AS, manufactured by Shinjin Chemical Co., Ltd.) and 5.0 parts by weight of 1,3- .

Comparative Example 2

A cosmetic composition was prepared in the same manner as in Example 2, except that the spherical zinc oxide of Comparative Example 1 was used instead of the rod-shaped zinc oxide of Example 1.

[exam]

To measure the ultraviolet blocking ability of the cosmetic composition of Example 2 (zinc oxide rod) and Comparative Example 2 (spherical zinc oxide), an optical element measuring instrument (Optometrics 290, manufactured by Optometrics) was used to measure SPF PFA was repeatedly measured five times, and the results are shown in Table 1 below. For the cosmetic compositions prepared in Example 2 and Comparative Example 2, the skin texture (softness), skin adhesion, aggregation, etc. were evaluated twice in a scale of 10 points on 20 panelists. The larger the value, the better the skin feel and skin adhesion. The results are shown in Table 1. The measured values are expressed as average values.

Example 2 Comparative Example 2 SPF 45.78 29.60 SPA 38.61 23.61 Feeling 9.2 6.7

As shown in Table 1, the cosmetic composition using the rod-shaped zinc oxide of the present invention exhibited a remarkably excellent ultraviolet shielding effect even when zinc oxide was used in the same amount as in Comparative Example 1, And showed remarkably excellent results. Also, although not shown, the cosmetic composition of Example 2 has excellent transparency when applied to skin, has little shine, and can be used as a high-quality ultraviolet screening agent.

Although the foregoing description of the present invention has been presented for purposes of illustration and description, it is not intended to be exhaustive or to limit the invention to the precise forms disclosed. It is to be understood that changes may be made and are included in the scope of the claims of the present invention.

Claims (10)

Characterized in that it comprises a bar-shaped zinc oxide having a length of 200 to 500 nm and an aspect ratio (Aspcet ratio) of 3.5 to 8 as an effective ingredient for UV-screening. delete The method according to claim 1,
Wherein the zinc oxide is coated with an organosilane. The method according to claim 1,
Wherein the content of the zinc oxide is 1 to 50% by weight. delete Mixing water and ZnO in a reactor, and then adding HCl to dissolve ZnO;
A second step of adding NaOH to the reactor of the first stage;
A third step of slowly accelerating and stirring the reactor of the second stage in which the NaOH is charged in a stationary state so as to take a time of at least 50 seconds until the stirring speed reaches the final 300 to 400 rpm; And
A fourth step of heating the reactor of the third step;
≪ / RTI > characterized in that the method comprises the steps of: The method according to claim 6,
Wherein the reactor of the third stage is slowly accelerated and agitated so as to take at least 20 seconds from the standstill to a stirring speed of 100 rpm. The method according to claim 6,
Wherein the reactor of the third stage is slowly accelerated and agitated so as to take at least 10 seconds from the standstill to a stirring speed of 50 rpm. The method according to claim 6,
Wherein the heating temperature in the fourth step is 90 to 100 ° C. 9. The bar-shaped zinc oxide according to any one of claims 6 to 9, wherein the length is 200 to 500 nm and the Aspcet ratio is 3.5 to 8.
KR1020150126596A 2015-09-07 2015-09-07 Cosmetic composition comprising rodlike zinc oxide KR101768772B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230111535A (en) 2022-01-18 2023-07-25 주식회사 코스메카코리아 Antioxidative cosmetic composition containing zinc oxide

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100936281B1 (en) * 2009-08-25 2010-01-13 한국지질자원연구원 Fabrication method of zno nano-particle and fabrication method of zno nano-fluid using thereof
JP2010168254A (en) * 2009-01-23 2010-08-05 Sakai Chem Ind Co Ltd Ultraviolet screening agent, cosmetic, and micro-acicular zinc oxide
KR101248837B1 (en) 2010-07-26 2013-03-29 인제대학교 산학협력단 Manufacturing method of zinc oxide nanorods with nano pore on surface and zinc oxide nanorods with nano pore on surface made by the same
KR101262037B1 (en) 2010-10-04 2013-05-08 주식회사 선진화학 Novel method for preparing composite particle comprising surface treatment layer of sunscreening agent formed thereon

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010168254A (en) * 2009-01-23 2010-08-05 Sakai Chem Ind Co Ltd Ultraviolet screening agent, cosmetic, and micro-acicular zinc oxide
KR100936281B1 (en) * 2009-08-25 2010-01-13 한국지질자원연구원 Fabrication method of zno nano-particle and fabrication method of zno nano-fluid using thereof
KR101248837B1 (en) 2010-07-26 2013-03-29 인제대학교 산학협력단 Manufacturing method of zinc oxide nanorods with nano pore on surface and zinc oxide nanorods with nano pore on surface made by the same
KR101262037B1 (en) 2010-10-04 2013-05-08 주식회사 선진화학 Novel method for preparing composite particle comprising surface treatment layer of sunscreening agent formed thereon

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230111535A (en) 2022-01-18 2023-07-25 주식회사 코스메카코리아 Antioxidative cosmetic composition containing zinc oxide

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