WO2024053786A1 - Aluminum-free, fatty acid-coated titanium dioxide powder and manufacturing method therefor - Google Patents

Aluminum-free, fatty acid-coated titanium dioxide powder and manufacturing method therefor Download PDF

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WO2024053786A1
WO2024053786A1 PCT/KR2022/018298 KR2022018298W WO2024053786A1 WO 2024053786 A1 WO2024053786 A1 WO 2024053786A1 KR 2022018298 W KR2022018298 W KR 2022018298W WO 2024053786 A1 WO2024053786 A1 WO 2024053786A1
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titanium dioxide
dioxide powder
fatty acid
acid
aluminum
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French (fr)
Korean (ko)
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이성호
김영기
장원준
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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
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • 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
    • A61K8/022—Powders; Compacted Powders
    • 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
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A61K8/29—Titanium; 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
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
    • A61K8/36—Carboxylic acids; Salts or anhydrides 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
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
    • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
    • A61K8/361—Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides thereof
    • 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
    • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
    • A61K2800/30—Characterized by the absence of a particular group of ingredients
    • 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
    • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/60—Particulates further characterized by their structure or composition
    • A61K2800/61—Surface treated
    • A61K2800/62—Coated
    • A61K2800/621—Coated by inorganic compounds
    • 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
    • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/60—Particulates further characterized by their structure or composition
    • A61K2800/61—Surface treated
    • A61K2800/62—Coated
    • A61K2800/622—Coated by organic compounds

Definitions

  • the present invention relates to titanium dioxide powder coated with fatty acid that does not contain aluminum and a method for manufacturing the same.
  • the negative image of causing Alzheimer's disease can be improved by not using aluminum, and titanium dioxide powder can be produced using a dry manufacturing method.
  • Titanium dioxide is a white powder with the highest refractive index among inorganic powders and is widely used as an additive in cosmetics, paint, and paper. In particular, it is the most widely used powder in cosmetics because it has excellent coverage in makeup cosmetics and has an excellent UV blocking effect in UV protection products.
  • titanium dioxide used in cosmetics has poor dispersibility in oil and may reduce the quality of cosmetics by promoting oxidation reactions, so these shortcomings are compensated for by treating the surface of titanium dioxide.
  • titanium dioxide As a surface treatment method for titanium dioxide, methods such as coating the surface of titanium dioxide with silica or alumina to change the physical properties or coating with organic polymers have been developed and commercialized.
  • the surface is treated with oil to increase the dispersibility of oil and prevent it from being stained or easily removed by moisture such as sweat.
  • oil-based treatment methods include surface treatment with alkyl silanes such as trimethoxyisobutylsilane, trimethoxyoctylsilane, and triethoxycaprylic silane, and coating with metal-fatty acid soap.
  • alkyl silanes such as trimethoxyisobutylsilane, trimethoxyoctylsilane, and triethoxycaprylic silane
  • metal-fatty acid soap for reasons such as safety, there is a trend to prefer powder treated with fatty acid rather than alkyl silane treatment.
  • the existing method of coating metal-fatty acid soap on titanium dioxide is to disperse titanium dioxide in water, add alkali-fatty acid soap to it, heat it to about 60 to 80 °C, and then coat it with aluminum chloride, aluminum sulfate, or zinc chloride. Zinc sulfate, etc. are added to produce metal soap and the metal soap is adsorbed to titanium dioxide. Afterwards, it is cooled, washed, and dehydrated to obtain titanium dioxide coated with metallic soap. Afterwards, it is dried, pulverized, and screened to produce titanium dioxide powder coated with metal soap.
  • this wet metal soap coating method has the advantage of creating a relatively uniform metal soap film, but it uses a lot of water, which can cause environmental problems such as wastewater, and also requires a lot of energy because the water must be heated, cooled, and dried. It has the disadvantage of being expensive and requiring a lot of manufacturing time.
  • titanium dioxide has no binding force with fatty acids, so when aluminum hydroxide (Al(OH)3), which has relatively high reactivity, is mixed with titanium dioxide, fatty acid is added and heated, it can be seen that aluminum fatty acid metal soap is coated on the surface of titanium dioxide. there was.
  • Al(OH)3 aluminum hydroxide
  • the technical problem to be achieved by the present invention is to solve the problems of the past. It is possible to improve the negative image of causing Alzheimer's disease by not using aluminum, and by manufacturing titanium dioxide powder using a dry manufacturing method, it uses water.
  • the purpose of the present invention is to provide a fatty acid-coated titanium dioxide powder that does not contain aluminum, which not only prevents environmental pollution, but also saves energy and shortens the manufacturing time, and a method for manufacturing the same.
  • Titanium dioxide powder for cosmetics coated with fatty acids Titanium dioxide powder for cosmetics coated with fatty acids
  • a titanium dioxide powder comprising a zinc-fatty acid coating layer formed directly adjacent to the surface of the titanium dioxide powder through dry coating.
  • the fatty acid is caplylic acid, capric acid, lauric acid, myristic acid, palmitic acid, and stearic acid. It is derived from one type or a mixture of two or more types from the group consisting of isostearic acid and behenic acid.
  • the zinc-fatty acid coating layer is included in an amount of 3 to 50 parts by weight based on 100 parts by weight of the titanium dioxide.
  • a third step of heating and reacting the stirred material of the second step
  • a fourth step of cooling and pulverizing the reactant of the third step
  • It provides a method for producing titanium dioxide powder, comprising:
  • the first step 1 to 20 parts by weight of zinc oxide is included based on 100 parts by weight of the titanium dioxide.
  • fatty acid is included based on 100 parts by weight of titanium dioxide.
  • the heating in the third step is heated to 100 to 150° C.
  • the present invention provides a cosmetic containing the titanium dioxide powder.
  • the present invention by changing the conventional wet manufacturing method to a dry manufacturing method in coating fatty acids on titanium dioxide, not only can environmental pollution be prevented by not using water, but energy can be saved and manufacturing time can be shortened. There is an advantage to having it.
  • the negative image that aluminum causes Alzheimer's disease can be improved by coating fatty acid on titanium dioxide using zinc oxide, which is widely used in cosmetics, instead of aluminum hydroxide, which is highly reactive in the dry method.
  • Figure 1 is a scanning electron microscope (SEM) energy dispersive spectroscopic analysis (EDS) photograph of the results of one embodiment of the present invention.
  • Figure 2 is a photograph when titanium dioxide insufficiently coated with fatty acid according to a comparative example of the present invention was placed in water and boiled for 1 minute.
  • Figure 3 is a photograph of stearic acid coated on titanium dioxide using aluminum hydroxide according to a comparative example of the present invention, placed in water and boiled for 30 minutes.
  • Figure 4 is a photograph of an embodiment of the present invention in which stearic acid coated with titanium dioxide using zinc oxide was placed in water and boiled for 30 minutes.
  • the present invention is a titanium dioxide powder in which fatty acid metal soap is coated on the surface of titanium dioxide, and a method of manufacturing it by a dry method was devised to solve the disadvantages of environmental pollution, large energy consumption, and long manufacturing time of the conventional wet method.
  • titanium dioxide coated with aluminum-fatty acid was produced using highly reactive aluminum hydroxide using a dry method.
  • the titanium dioxide powder of the present invention is a fatty acid-coated titanium dioxide powder for cosmetic use, does not contain aluminum, and is characterized by including a zinc-fatty acid coating layer formed directly adjacent to the surface of the titanium dioxide powder through dry coating.
  • a third step of heating and reacting the stirred material of the second step
  • a fourth step of cooling and pulverizing the reactant of the third step
  • It can be manufactured through a method for producing titanium dioxide powder, characterized in that it contains.
  • the method for producing fatty acid-coated titanium dioxide powder of the present invention is characterized in that it is produced by adding a fatty acid to a mixture of titanium dioxide and zinc oxide and reacting it without using aluminum hydroxide, which is highly reactive with fatty acids.
  • the amount of zinc oxide can be 1 to 20 parts by weight, preferably 2 to 10 parts by weight, based on 100 parts by weight of titanium dioxide. If the amount of zinc oxide is too small outside the above range, sufficient zinc-fatty acid metal soap is not created, resulting in insufficient coating, and if the amount of zinc oxide is too large, a lot of unreacted zinc oxide will be present.
  • Fatty acids used in the second step are preferably caplylic acid, capric acid, lauric acid, myristic acid, palmitic acid, Fatty acids such as stearic acid, isostearic acid, and behenic acid can be used individually or in a mixture of two or more types. More preferably, it is good to use only one fatty acid to ensure product homogeneity.
  • the amount of the fatty acid can be 2 to 30 parts by weight, preferably 3 to 15 parts by weight, based on 100 parts by weight of titanium dioxide used. If the amount of fatty acid is too small outside the above range, sufficient zinc-fatty acid metal soap cannot be produced, and if the amount of fatty acid is large, unreacted fatty acid remains, which worsens the feeling of use and may also adversely affect the physical properties of the final product.
  • the reaction temperature in the third step may be 100 to 150°C. More preferably, the reaction is carried out at 110 to 120°C. If the reaction temperature is less than 100 °C, a dehydration reaction occurs when fatty acid and zinc oxide react to form metal soap, so the reaction does not occur sufficiently because water cannot be sufficiently removed, and the metal soap dissolves at about 110 °C. Reacting above °C is better for uniform coating. However, if the temperature is too high, the reaction speed may be faster, but there is a risk that the fatty acid may deteriorate and change color or odor.
  • the reacted powder is cooled to room temperature, and since there is some agglomerated powder, it is pulverized and filtered through a 100 to 200 mesh sieve to produce fatty acid-coated titanium dioxide. If necessary, a drying process may be further included.
  • the first step and the second step may be performed simultaneously, and the second step and the third step may be performed simultaneously.
  • the first step, second step, and third step are performed sequentially.
  • the method for manufacturing titanium dioxide powder according to the present invention uses a dry manufacturing method to not only prevent environmental pollution by not using water, but also save energy and shorten the manufacturing time. there is.
  • the fatty acid-coated titanium dioxide powder for cosmetics according to the present invention does not contain aluminum, and preferably contains 3 to 50 parts by weight of the zinc-fatty acid coating layer based on 100 parts by weight of the titanium dioxide. In this case, the stability of titanium dioxide powder in cosmetics is even better.
  • titanium dioxide coated with fatty acid according to the present invention has excellent water resistance and can be used as a cosmetic product that does not easily spread when applied to cosmetics.
  • Figure 1 is a scanning electron microscope (SEM) energy dispersive spectroscopic analysis (EDS) photograph of the results of the above example.
  • SEM scanning electron microscope
  • EDS energy dispersive spectroscopic analysis
  • FIG 2 is a photograph of titanium dioxide powder prepared in the same manner as Example 1 except that zinc oxide was not mixed in water and boiled for 1 minute. In Figure 2, it can be seen that titanium dioxide and stearic acid are separated in an instant.
  • FIG 3 is a photograph of stearic acid coated on titanium dioxide using aluminum hydroxide in a wet manner, placed in water and boiled for 30 minutes.
  • titanium dioxide is not separated, indicating that aluminum-stearic acid metal soap is chemically bonded and coated on the surface of titanium dioxide.
  • FIG 4 is a photograph of the titanium dioxide powder prepared in Example 1 of the present invention when placed in water and boiled for 30 minutes. In this photo, titanium dioxide is not separated, indicating that zinc-stearic acid metal soap is chemically bonded and coated on the surface of titanium dioxide.

Abstract

The present invention pertains to aluminum-free, fatty acid-coated titanium dioxide powder and a manufacturing method therefor. Specifically, the present invention relates to fatty acid-coated, cosmetic titanium dioxide powder that does not contain aluminum and has a zinc-fatty acid coating layer formed directly adjacent to the surface of the titanium dioxide powder through dry coating. According to the present invention, the freedom from aluminum can dispel the negative image of causing Alzheimer's disease and the dry manufacturing method for titanium dioxide powder does not employ water, whereby environmental pollution prevention, energy saving, and manufacturing time reduction can be achieved.

Description

알루미늄이 포함되지 않은 지방산이 코팅된 이산화티탄 분체 및 그의 제조방법Titanium dioxide powder coated with fatty acid that does not contain aluminum and its manufacturing method
본 발명은 알루미늄이 포함되지 않은 지방산이 코팅된 이산화티탄 분체 및 그의 제조방법에 관한 것으로, 특히 알루미늄을 사용하지 않아 알쯔하이머 병을 유발한다는 부정적인 이미지를 개선할 수 있으며, 건식제조방법을 사용하여 이산화티탄 분체를 제조함으로써 물을 사용하지 않아 환경오염을 방지할 수 있을 뿐만 아니라 에너지를 절감할 수 있고, 제조시간을 단축할 수 있는 알루미늄이 포함되지 않은 지방산이 코팅된 이산화티탄 분체 및 그의 제조방법에 관한 것이다.The present invention relates to titanium dioxide powder coated with fatty acid that does not contain aluminum and a method for manufacturing the same. In particular, the negative image of causing Alzheimer's disease can be improved by not using aluminum, and titanium dioxide powder can be produced using a dry manufacturing method. About titanium dioxide powder coated with aluminum-free fatty acid, which not only prevents environmental pollution by not using water by manufacturing powder, but also saves energy and shortens manufacturing time, and its manufacturing method. will be.
이하에 기술되는 내용은 단순히 본 발명과 관련되는 배경 정보만을 제공할 뿐 종래기술을 구성하는 것이 아니다.The content described below simply provides background information related to the present invention and does not constitute prior art.
이산화티탄은 무기분체 중 굴절율이 가장 큰 백색분말로서 화장품, 페인트, 종이의 첨가제로서 널리 사용되는 물질이다. 특히 메이컵 화장품에서 커버력이 우수하고 또한 자외선 차단 제품에서 자외선 차단 효과가 우수하므로 화장품에서 가장 널리 사용되는 분체이다.Titanium dioxide is a white powder with the highest refractive index among inorganic powders and is widely used as an additive in cosmetics, paint, and paper. In particular, it is the most widely used powder in cosmetics because it has excellent coverage in makeup cosmetics and has an excellent UV blocking effect in UV protection products.
그러나 화장품에 사용되는 이산화티탄은 오일에 대한 분산성이 나쁘고, 산화반응 등을 촉진시켜 화장품의 품질을 저하시킬 수도 있으므로 이산화티탄의 표면을 처리하여 이러한 단점을 보완하고 있다.However, titanium dioxide used in cosmetics has poor dispersibility in oil and may reduce the quality of cosmetics by promoting oxidation reactions, so these shortcomings are compensated for by treating the surface of titanium dioxide.
이산화티탄의 표면처리 방법으로는 이산화티탄의 표면에 실리카나 알루미나 등을 코팅하여 물성을 바꾸어 주거나 또는 유기 폴리머를 코팅 등의 방법도 개발되어 상품화 되어있다. 특히 화장품에서 오일에 대한 분산성을 높이고 땀 등의 수분에 의해 얼룩이 지거나 잘 지워지지 않도록 하기 위하여 표면을 유성 처리하여 사용 한다.As a surface treatment method for titanium dioxide, methods such as coating the surface of titanium dioxide with silica or alumina to change the physical properties or coating with organic polymers have been developed and commercialized. In particular, in cosmetics, the surface is treated with oil to increase the dispersibility of oil and prevent it from being stained or easily removed by moisture such as sweat.
이러한 유성처리 방법으로는 트리메톡시이소부틸실란, 트리메톡시옥틸실란, 트리에톡시카프릴릭실란 등의 알킬 실란을 표면처리하는 방법과 금속-지방산 비누를 코팅하는 방법이 널리 이용되고 있으며, 안전성 등의 이유로 알킬 실란 처리 보다는 지방산으로 처리된 분체를 더 선호하는 추세이다.These oil-based treatment methods include surface treatment with alkyl silanes such as trimethoxyisobutylsilane, trimethoxyoctylsilane, and triethoxycaprylic silane, and coating with metal-fatty acid soap. For reasons such as safety, there is a trend to prefer powder treated with fatty acid rather than alkyl silane treatment.
기존의 금속-지방산 비누를 이산화티탄에 코팅하는 방법은 물에 이산화티탄을 분산시키고 여기에 알카리-지방산 비누를 첨가한 뒤 약 60 내지 80 ℃로 가열한 뒤 알루미늄 클로라이드나, 알루미늄 설페이트 또는 아연 클로라이드나 아연 설페이트 등을 가하여 금속 비누를 생성시켜 금속비누가 이산화티탄에 흡착되게 한다. 이후 냉각하고 세척, 탈수하여 금속비누가 코팅된 이산화티탄을 얻는다. 이후 이를 건조한 후 분쇄하고 체로 선별하여 금속비누가 코팅된 이산화티탄 분체를 제조한다.The existing method of coating metal-fatty acid soap on titanium dioxide is to disperse titanium dioxide in water, add alkali-fatty acid soap to it, heat it to about 60 to 80 ℃, and then coat it with aluminum chloride, aluminum sulfate, or zinc chloride. Zinc sulfate, etc. are added to produce metal soap and the metal soap is adsorbed to titanium dioxide. Afterwards, it is cooled, washed, and dehydrated to obtain titanium dioxide coated with metallic soap. Afterwards, it is dried, pulverized, and screened to produce titanium dioxide powder coated with metal soap.
그러나 이러한 습식 금속비누 코팅 방법은 비교적 균일한 금속비누막을 만들 수 있다는 장점이 있으나, 많은 물을 사용하여 폐수 등의 환경 문제를 야기할 수 있으며, 또한 물을 가열, 냉각하고 건조하여야 하므로 에너지가 많이 소비되며, 제조시간이 많이 소요된다는 단점이 있다.However, this wet metal soap coating method has the advantage of creating a relatively uniform metal soap film, but it uses a lot of water, which can cause environmental problems such as wastewater, and also requires a lot of energy because the water must be heated, cooled, and dried. It has the disadvantage of being expensive and requiring a lot of manufacturing time.
이러한 단점을 극복하기 위하여 건식 금속비누 코팅 방법을 검토하였다. 그러나 이산화티탄은 지방산과 결합력이 없으므로 비교적 반응성이 우수한 알루미늄 하이드록사이드(Al(OH)₃)를 이산화티탄과 혼합하고 여기에 지방산을 가하여 가열하면 이산화티탄 표면에 알루미늄 지방산 금속비누가 코팅됨을 확인할 수 있었다. To overcome these shortcomings, a dry metal soap coating method was reviewed. However, titanium dioxide has no binding force with fatty acids, so when aluminum hydroxide (Al(OH)₃), which has relatively high reactivity, is mixed with titanium dioxide, fatty acid is added and heated, it can be seen that aluminum fatty acid metal soap is coated on the surface of titanium dioxide. there was.
한편, 알루미늄은 뇌의 아밀로이드와 베타단백질과 응집형태로 결합하여 알츠하이머병(Alzhelmer's disease)를 야기한다는 연구 보고가 있어 알루미늄을 사용하지 않은 금속 비누의 이산화티탄 건식 코팅 방법이 절실하게 요구되었다.Meanwhile, research reports have shown that aluminum binds to amyloid and beta protein in the brain in an aggregated form, causing Alzheimer's disease, so there was an urgent need for a titanium dioxide dry coating method for metal soap that does not use aluminum.
본 발명이 이루고자 하는 기술적 과제는 종래의 문제점을 해결하기 위한 것으로, 알루미늄을 사용하지 않아 알쯔하이머 병을 유발한다는 부정적인 이미지를 개선할 수 있으며, 건식제조방법을 사용하여 이산화티탄 분체를 제조함으로써 물을 사용하지 않아 환경오염을 방지할 수 있을 뿐만 아니라 에너지를 절감할 수 있고, 제조시간을 단축할 수 있는 알루미늄이 포함되지 않은 지방산이 코팅된 이산화티탄 분체 및 그의 제조방법을 제공하는 것을 목적으로 한다.The technical problem to be achieved by the present invention is to solve the problems of the past. It is possible to improve the negative image of causing Alzheimer's disease by not using aluminum, and by manufacturing titanium dioxide powder using a dry manufacturing method, it uses water. The purpose of the present invention is to provide a fatty acid-coated titanium dioxide powder that does not contain aluminum, which not only prevents environmental pollution, but also saves energy and shortens the manufacturing time, and a method for manufacturing the same.
본 발명은 This invention
지방산이 코팅된 화장료용 이산화티탄 분체로서,Titanium dioxide powder for cosmetics coated with fatty acids,
알루미늄이 포함되지 않으며,Does not contain aluminum,
건식코팅을 통하여 이산화티탄 분말 표면에 직접 인접하여 형성된 아연-지방산 코팅층을 포함하는 것을 특징으로 하는 이산화티탄 분체를 제공한다.Provided is a titanium dioxide powder comprising a zinc-fatty acid coating layer formed directly adjacent to the surface of the titanium dioxide powder through dry coating.
바람직하기로 상기 지방산은 카플릴릭산(caplylic acid), 카프릭산(caplic acid), 라우릭산(lauric acid), 미리스틱산(myristic acid), 팔미틱산(palmitic acid), 스테아릭산(stearic acid), 이소스테아릭산(isostearic acid) 및 베헤닉산(behenic acid)으로 이루어지는 군으로부터 1종 또는 2종 이상의 혼합물로부터 유래되는 것이다.Preferably, the fatty acid is caplylic acid, capric acid, lauric acid, myristic acid, palmitic acid, and stearic acid. It is derived from one type or a mixture of two or more types from the group consisting of isostearic acid and behenic acid.
바람직하기로 상기 이산화티탄 100 중량부에 대하여 상기 아연-지방산 코팅층이 3 내지 50 중량부로 포함되는 것이다.Preferably, the zinc-fatty acid coating layer is included in an amount of 3 to 50 parts by weight based on 100 parts by weight of the titanium dioxide.
또한 본 발명은Additionally, the present invention
알루미늄이 포함되지 않은 지방산이 코팅된 화장료용 이산화티탄 분체의 제조방법으로서,A method for producing titanium dioxide powder for cosmetics coated with fatty acid that does not contain aluminum,
이산화티탄과 산화아연을 균질하게 혼합하는 제1단계;A first step of homogeneously mixing titanium dioxide and zinc oxide;
상기 제1단계의 혼합물에 지방산을 추가하여 균질하게 교반하는 제2단계;A second step of adding fatty acid to the mixture of the first step and stirring it homogeneously;
상기 제2단계의 교반물을 가열하여 반응시키는 제3단계; 및A third step of heating and reacting the stirred material of the second step; and
상기 제3단계의 반응물을 냉각하고, 분쇄하는 제4단계;A fourth step of cooling and pulverizing the reactant of the third step;
를 포함하는 것을 특징으로 하는 이산화티탄 분체의 제조방법을 제공한다.It provides a method for producing titanium dioxide powder, comprising:
바람직하기로 상기 제1단계에서 상기 이산화티탄 100 중량부에 대하여 산화아연 1 내지 20 중량부를 포함하는 것이다.Preferably, in the first step, 1 to 20 parts by weight of zinc oxide is included based on 100 parts by weight of the titanium dioxide.
바람직하기로 상기 제2단계에서 상기 이산화티탄 100 중량부에 대하여 지방산 2 내지 30 중량부를 포함하는 것이다.Preferably, in the second step, 2 to 30 parts by weight of fatty acid is included based on 100 parts by weight of titanium dioxide.
바람직하기로 상기 제3단계에서 가열은 100 내지 150 ℃로 가열되는 것이다.Preferably, the heating in the third step is heated to 100 to 150° C.
또한 본 발명은 상기 이산화티탄 분체를 포함하는 화장료를 제공한다.Additionally, the present invention provides a cosmetic containing the titanium dioxide powder.
본 발명에 따르면 이산화티탄에 지방산을 코팅하는데 있어 종래의 습식제조방법에서 건식제조방법으로 변경하여 물을 사용하지 않아 환경오염을 방지할 수 있을 뿐만 아니라 에너지를 절감할 수 있고 제조시간을 단축할 수 있다는 장점이 있다. 또한 건식법에서 반응성이 큰 알루미늄 하이드록사이드 대신에 화장품에 널리 사용되는 산화아연을 이용하여 지방산을 이산화티탄에 코팅함으로서 알루미늄이 알쯔하이머 병을 유발한다는 부정적인 이미지를 개선할 수 있다.According to the present invention, by changing the conventional wet manufacturing method to a dry manufacturing method in coating fatty acids on titanium dioxide, not only can environmental pollution be prevented by not using water, but energy can be saved and manufacturing time can be shortened. There is an advantage to having it. In addition, the negative image that aluminum causes Alzheimer's disease can be improved by coating fatty acid on titanium dioxide using zinc oxide, which is widely used in cosmetics, instead of aluminum hydroxide, which is highly reactive in the dry method.
도 1은 본 발명의 일실시예 결과물의 주사전자현미경(SEM)의 에너지분산형 분광분석(EDS) 사진이다.Figure 1 is a scanning electron microscope (SEM) energy dispersive spectroscopic analysis (EDS) photograph of the results of one embodiment of the present invention.
도 2는 본 발명의 비교예에 따른 지방산이 불충분하게 코팅된 이산화티탄을 물에 넣고 1분간 끓었을 때의 사진이다.Figure 2 is a photograph when titanium dioxide insufficiently coated with fatty acid according to a comparative example of the present invention was placed in water and boiled for 1 minute.
도 3은 본 발명의 비교예에 따른 알루미늄 하이드록사이드를 사용하여 스테아린산을 이산화티탄에 코팅한 것을 물에 넣고 30분간 끓었을 때의 사진이다.Figure 3 is a photograph of stearic acid coated on titanium dioxide using aluminum hydroxide according to a comparative example of the present invention, placed in water and boiled for 30 minutes.
도 4는 본 발명의 일실시예 산화아연을 사용하여 스테아린산을 이산화티탄에 코팅한 것을 물에 넣고 30분간 끓었을 때의 사진이다.Figure 4 is a photograph of an embodiment of the present invention in which stearic acid coated with titanium dioxide using zinc oxide was placed in water and boiled for 30 minutes.
본 발명의 실시예에 대하여 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. 그러나 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다.Embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein.
본 명세서 전체에서, 어떤 부분이 어떤 구성요소를 "포함"한다고 할 때, 이는 특별히 반대되는 기재가 없는 한 다른 구성요소를 제외하는 것이 아니라 다른 구성 요소를 더 포함할 수 있는 것을 의미한다.Throughout this specification, when a part “includes” a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary.
본 발명은 지방산 금속비누가 이산화티탄 표면에 코팅된 이산화티탄 분체로서 종래의 습식법의 환경오염, 에너지 다량소비, 제조 시간이 길다는 단점을 해결하기 위하여 건식법으로 제조하는 방법을 강구하였다.The present invention is a titanium dioxide powder in which fatty acid metal soap is coated on the surface of titanium dioxide, and a method of manufacturing it by a dry method was devised to solve the disadvantages of environmental pollution, large energy consumption, and long manufacturing time of the conventional wet method.
건식법으로 우선 반응성이 큰 알루미늄 하이드록사이드를 이용하여 알루미늄-지방산이 코팅된 이산화티탄이 제조됨을 확인할 수 있었다. It was confirmed that titanium dioxide coated with aluminum-fatty acid was produced using highly reactive aluminum hydroxide using a dry method.
그러나 알루미늄은 알쯔하이머 병을 유발한다는 보고가 있어 이를 대체할 필요가 있었고, 산화아연을 이용하여 특정 조건에서 안정성이 현저히 우수한 아연-지방산 코팅증이 형성됨을 확인할 수 있었다.However, it was reported that aluminum causes Alzheimer's disease, so it was necessary to replace it, and it was confirmed that zinc-fatty acid coating with significantly excellent stability was formed under certain conditions by using zinc oxide.
본 발명의 이산화티탄 분체는 지방산이 코팅된 화장료용 이산화티탄 분체로서, 알루미늄이 포함되지 않으며, 건식코팅을 통하여 이산화티탄 분말 표면에 직접 인접하여 형성된 아연-지방산 코팅층을 포함하는 것을 특징으로 한다.The titanium dioxide powder of the present invention is a fatty acid-coated titanium dioxide powder for cosmetic use, does not contain aluminum, and is characterized by including a zinc-fatty acid coating layer formed directly adjacent to the surface of the titanium dioxide powder through dry coating.
상기 알루미늄이 포함되지 않은 지방산이 코팅된 화장료용 이산화티탄 분체는Titanium dioxide powder for cosmetics coated with fatty acid that does not contain aluminum
이산화티탄과 산화아연을 균질하게 혼합하는 제1단계;A first step of homogeneously mixing titanium dioxide and zinc oxide;
상기 제1단계의 혼합물에 지방산을 추가하여 균질하게 교반하는 제2단계;A second step of adding fatty acid to the mixture of the first step and stirring it homogeneously;
상기 제2단계의 교반물을 가열하여 반응시키는 제3단계; 및A third step of heating and reacting the stirred material of the second step; and
상기 제3단계의 반응물을 냉각하고, 분쇄하는 제4단계;A fourth step of cooling and pulverizing the reactant of the third step;
를 포함하는 것을 특징으로 하는 이산화티탄 분체의 제조방법을 통하여 제조될 수 있다.It can be manufactured through a method for producing titanium dioxide powder, characterized in that it contains.
본 발명의 지방산이 코팅된 이산화티탄 분체의 제조방법은 지방산과 반응성이 큰 알루미늄 하이드록사이드를 사용하지 않고 이산화티탄과 산화아연의 혼합물에 지방산을 첨가하여 반응시켜 제조하는 것을 특징으로 한다.The method for producing fatty acid-coated titanium dioxide powder of the present invention is characterized in that it is produced by adding a fatty acid to a mixture of titanium dioxide and zinc oxide and reacting it without using aluminum hydroxide, which is highly reactive with fatty acids.
상기 제1단계에서 산화아연의 양은 이산화티탄 100 중량부에 대하여 1 내지 20 중량부로 사용할 수 있으며, 바람직하기로는 2 내지 10 중량부로 사용한다. 상기 범위를 벗어나 산화아연 양이 너무 적으면 충분히 아연 - 지방산의 금속비누가 만들어지지 않아 코팅이 불충분하며, 산화아연 양이 너무 많으면 미 반응 산화아연이 많이 존재하게 된다.In the first step, the amount of zinc oxide can be 1 to 20 parts by weight, preferably 2 to 10 parts by weight, based on 100 parts by weight of titanium dioxide. If the amount of zinc oxide is too small outside the above range, sufficient zinc-fatty acid metal soap is not created, resulting in insufficient coating, and if the amount of zinc oxide is too large, a lot of unreacted zinc oxide will be present.
상기 제2단계에서 사용되는 지방산은 바람직하기로 카플릴릭산(caplylic acid), 카프릭산(caplic acid), 라우릭산(lauric acid), 미리스틱산(myristic acid), 팔미틱산(palmitic acid), 스테아릭산(stearic acid), 이소스테아릭산(isostearic acid), 베헤닉산(behenic acid) 등의 지방산을 단독으로 또는 2종 이상의 혼합물을 사용할 수 있다. 더욱 바람직하기로는 제품의 균질성을 위하여 한가지의 지방산만 사용하는 것이 좋다. Fatty acids used in the second step are preferably caplylic acid, capric acid, lauric acid, myristic acid, palmitic acid, Fatty acids such as stearic acid, isostearic acid, and behenic acid can be used individually or in a mixture of two or more types. More preferably, it is good to use only one fatty acid to ensure product homogeneity.
상기 지방산 양은 사용된 이산화티탄 100 중량부에 대하여 2 내지 30 중량부로 사용할 수 있으며, 바람직하게는 3 내지 15 중량부로 사용한다. 상기 범위를 벗어나 지방산 양이 너무 적으면 충분히 아연 - 지방산 금속비누가 만들어지지 않으며, 또한 지방산 양이 많으면 미반응의 지방산이 남아 사용감이 나빠지며, 최종 제품의 물성에도 나쁜 영향을 줄 수 있다.The amount of the fatty acid can be 2 to 30 parts by weight, preferably 3 to 15 parts by weight, based on 100 parts by weight of titanium dioxide used. If the amount of fatty acid is too small outside the above range, sufficient zinc-fatty acid metal soap cannot be produced, and if the amount of fatty acid is large, unreacted fatty acid remains, which worsens the feeling of use and may also adversely affect the physical properties of the final product.
바람직하기로 상기 제3단계에서 반응온도는 100 내지 150 ℃에서 반응할 수 있다. 더욱 바람직하기로는 110 내지 120 ℃에서 반응시킨다. 반응온도가 100 ℃ 미만인 경우 지방산과 산화아연이 반응하여 금속비누가 될 때 탈수 반응이 일어나므로 충분히 물을 제거하지 못하기 때문에 반응이 불충분하게 일어나며, 또한 만들어진 금속비누가 약 110 ℃에서 용해되므로 110 ℃ 이상에서 반응하는 것이 균일한 코팅을 위하여 더욱 좋다. 그러나 온도가 너무 높으면 반응 속도는 빨라지나 지방산이 열화되어 색상이나 냄새가 변할 우려가 있다.Preferably, the reaction temperature in the third step may be 100 to 150°C. More preferably, the reaction is carried out at 110 to 120°C. If the reaction temperature is less than 100 ℃, a dehydration reaction occurs when fatty acid and zinc oxide react to form metal soap, so the reaction does not occur sufficiently because water cannot be sufficiently removed, and the metal soap dissolves at about 110 ℃. Reacting above ℃ is better for uniform coating. However, if the temperature is too high, the reaction speed may be faster, but there is a risk that the fatty acid may deteriorate and change color or odor.
상기 제4단계에는 반응이 끝난 분체를 실온으로 냉각하고 일부 응집이 일어난 분체가 있으므로 이를 분쇄하여 100 내지 200 메쉬 체로 걸러 지방산이 코팅된 이산화티탄을 제조할 수 있다. 필요한 경우 건조하는 공정을 더욱 포함할 수도 있다.In the fourth step, the reacted powder is cooled to room temperature, and since there is some agglomerated powder, it is pulverized and filtered through a 100 to 200 mesh sieve to produce fatty acid-coated titanium dioxide. If necessary, a drying process may be further included.
본 발명의 이산화티탄 분체의 제조방법은 상기 제1단계와 상기 제2단계가 동시에 이루어질 수도 있으며, 상기 제2단계와 제3단계가 동시에 이루어질 수도 있다. 바람직하기로는 상기 제1단계- 제2단계- 제3단계가 순차적으로 이루어지는 것이 좋다.In the method for producing titanium dioxide powder of the present invention, the first step and the second step may be performed simultaneously, and the second step and the third step may be performed simultaneously. Preferably, the first step, second step, and third step are performed sequentially.
본 발명에 따른 이산화티탄 분체의 제조방법은 건식제조방법을 사용하여 이산화티탄 분체를 제조함으로써 물을 사용하지 않아 환경오염을 방지할 수 있을 뿐만 아니라 에너지를 절감할 수 있고, 제조시간을 단축할 수 있다.The method for manufacturing titanium dioxide powder according to the present invention uses a dry manufacturing method to not only prevent environmental pollution by not using water, but also save energy and shorten the manufacturing time. there is.
본 발명에 따른 지방산이 코팅된 화장료용 이산화티탄 분체는 알루미늄이 포함되지 않으며, 전체적으로 상기 이산화티탄 100 중량부에 대하여 상기 아연-지방산 코팅층이 3 내지 50 중량부로 포함되는 것이 좋다. 이 경우 이산화티탄 분체의 화장품 내에서의 안정성이 더욱 우수하다.The fatty acid-coated titanium dioxide powder for cosmetics according to the present invention does not contain aluminum, and preferably contains 3 to 50 parts by weight of the zinc-fatty acid coating layer based on 100 parts by weight of the titanium dioxide. In this case, the stability of titanium dioxide powder in cosmetics is even better.
본 발명에 따른 지방산이 코팅된 이산화티탄 분체는, 전자현미경 (SEM) 관찰결과 이산화티탄의 표면에 인접하여 직접 아연 -지방산 코팅층이 균일하게 형성되어 있다. 또한 물에 첨가하여 30분 이상 끓인 후 관찰한 결과 지방산과 이산화티탄이 분리되지 않음은 지방산이 이산화티탄 표면에 화학적으로 결합되어 부착되어 있음도 알 수 있다.In the fatty acid-coated titanium dioxide powder according to the present invention, an electron microscope (SEM) observation showed that a zinc-fatty acid coating layer was formed uniformly directly adjacent to the surface of the titanium dioxide. In addition, as a result of observation after adding it to water and boiling it for more than 30 minutes, it can be seen that the fatty acid and titanium dioxide are not separated and that the fatty acid is chemically bonded and attached to the surface of titanium dioxide.
따라서, 본 발명에 따른 지방산이 코팅된 이산화티탄은 내수성이 우수하여 화장품에 적용될 경우 쉽게 번지지 않는 화장품이 될 수 있다.Therefore, titanium dioxide coated with fatty acid according to the present invention has excellent water resistance and can be used as a cosmetic product that does not easily spread when applied to cosmetics.
이하, 본 발명을 실시예를 통하여 상세히 설명하면 다음과 같다. 단, 하기 실시예는 본 발명을 예시하는 것일 뿐, 본 발명이 하기 실시예에 의해 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail through examples. However, the following examples are merely illustrative of the present invention, and the present invention is not limited by the following examples.
[실시예 1][Example 1]
이산화티탄 100 kg, 산화아연 7 kg을 혼합한 후 실온에서 교반하여 균일하게 하였다. 여기에 스테아릭산 12 kg을 혼합한 후 실온에서 교반하여 균일하게 하였다. 이를 가온하여 온도를 115 ℃로 하여 교반하면서 1시간 반응시켰다. 반응 후 실온으로 냉각하고 분쇄한 후 150 메쉬로 체질하여 지방산이 코팅된 이산화티탄을 제조하였다.100 kg of titanium dioxide and 7 kg of zinc oxide were mixed and stirred at room temperature to make them uniform. 12 kg of stearic acid was mixed here and stirred at room temperature to make it uniform. This was heated to a temperature of 115°C and reacted for 1 hour while stirring. After the reaction, it was cooled to room temperature, pulverized, and sieved with a 150 mesh to prepare fatty acid-coated titanium dioxide.
도 1은 상기 실시예 결과물의 주사전자현미경(SEM)의 에너지분산형 분광분석(EDS) 사진이다. 도 1에서 이산화티탄 표면에 아연 - 스테아린산 금속비누가 균일하게 분포하는 것을 알 수 있다.Figure 1 is a scanning electron microscope (SEM) energy dispersive spectroscopic analysis (EDS) photograph of the results of the above example. In Figure 1, it can be seen that zinc-stearic acid metal soap is uniformly distributed on the surface of titanium dioxide.
도 2는 실시예 1에서 산화아연을 혼합하지 않은 것을 제외하고는 실시예 1과 동일한 방법으로 제조된 이산화티탄 분체를 물에 넣고 1분간 끓었을 때의 사진이다. 도 2에서 순식간에 이산화티탄과 스테아린산이 분리됨을 알 수 있다.Figure 2 is a photograph of titanium dioxide powder prepared in the same manner as Example 1 except that zinc oxide was not mixed in water and boiled for 1 minute. In Figure 2, it can be seen that titanium dioxide and stearic acid are separated in an instant.
도 3은 습식으로 알루미늄 하이드록사이드를 사용하여 스테아린산을 이산화티탄에 코팅한 것을 물에 넣고 30분간 끓었을 때의 사진이다. 도 3에서 이산화티탄이 분리되지 않는 것으로 보아 이산화티탄 표면에 알루미늄 -스테아린산 금속비누가 화학적으로 결합하여 코팅된 것을 알 수 있다.Figure 3 is a photograph of stearic acid coated on titanium dioxide using aluminum hydroxide in a wet manner, placed in water and boiled for 30 minutes. In Figure 3, titanium dioxide is not separated, indicating that aluminum-stearic acid metal soap is chemically bonded and coated on the surface of titanium dioxide.
도 4는 본 발명의 실시예 1에서 제조된 이산화티탄 분체를 물에 넣고 30분간 끓었을 때의 사진이다. 이 사진에서 이산화티탄이 분리되지 않는 것으로 보아 이산화티탄 표면에 아연 -스테아린산 금속비누가 화학적으로 결합하여 코팅된 것을 알 수 있다.Figure 4 is a photograph of the titanium dioxide powder prepared in Example 1 of the present invention when placed in water and boiled for 30 minutes. In this photo, titanium dioxide is not separated, indicating that zinc-stearic acid metal soap is chemically bonded and coated on the surface of titanium dioxide.

Claims (8)

  1. 지방산이 코팅된 화장료용 이산화티탄 분체로서,Titanium dioxide powder for cosmetics coated with fatty acids,
    알루미늄이 포함되지 않으며,Does not contain aluminum,
    건식코팅을 통하여 이산화티탄 분말 표면에 직접 인접하여 형성된 아연-지방산 코팅층을 포함하는 것을 특징으로 하는 이산화티탄 분체.Titanium dioxide powder comprising a zinc-fatty acid coating layer formed directly adjacent to the surface of the titanium dioxide powder through dry coating.
  2. 제1항에 있어서,According to paragraph 1,
    상기 지방산은 카플릴릭산(caplylic acid), 카프릭산(caplic acid), 라우릭산(lauric acid), 미리스틱산(myristic acid), 팔미틱산(palmitic acid), 스테아릭산(stearic acid), 이소스테아릭산(isostearic acid) 및 베헤닉산(behenic acid)으로 이루어지는 군으로부터 1종 또는 2종 이상의 혼합물로부터 유래되는 것을 특징으로 하는 이산화티탄 분체.The fatty acids include caplylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and isostear. Titanium dioxide powder, characterized in that it is derived from one type or a mixture of two or more types from the group consisting of isostearic acid and behenic acid.
  3. 제1항에 있어서,According to paragraph 1,
    상기 이산화티탄 100 중량부에 대하여 상기 아연-지방산 코팅층이 3 내지 50 중량부로 포함되는 것을 특징으로 하는 이산화티탄 분체.Titanium dioxide powder, characterized in that the zinc-fatty acid coating layer is included in an amount of 3 to 50 parts by weight based on 100 parts by weight of the titanium dioxide.
  4. 알루미늄이 포함되지 않은 지방산이 코팅된 화장료용 이산화티탄 분체의 제조방법으로서,A method for producing titanium dioxide powder for cosmetics coated with fatty acid that does not contain aluminum,
    이산화티탄과 산화아연을 균질하게 혼합하는 제1단계;A first step of homogeneously mixing titanium dioxide and zinc oxide;
    상기 제1단계의 혼합물에 지방산을 추가하여 균질하게 교반하는 제2단계;A second step of adding fatty acid to the mixture of the first step and stirring it homogeneously;
    상기 제2단계의 교반물을 가열하여 반응시키는 제3단계; 및A third step of heating and reacting the stirred material of the second step; and
    상기 제3단계의 반응물을 냉각하고, 분쇄하는 제4단계;A fourth step of cooling and pulverizing the reactant of the third step;
    를 포함하는 것을 특징으로 하는 이산화티탄 분체의 제조방법.A method for producing titanium dioxide powder, comprising:
  5. 제4항에 있어서,According to clause 4,
    상기 제1단계에서 상기 이산화티탄 100 중량부에 대하여 산화아연 1 내지 20 중량부를 포함하는 것을 특징으로 하는 이산화티탄 분체의 제조방법.A method for producing titanium dioxide powder, characterized in that it includes 1 to 20 parts by weight of zinc oxide based on 100 parts by weight of the titanium dioxide in the first step.
  6. 제4항에 있어서,According to clause 4,
    상기 제2단계에서 상기 이산화티탄 100 중량부에 대하여 지방산 2 내지 30 중량부를 포함하는 것을 특징으로 하는 이산화티탄 분체의 제조방법.A method for producing titanium dioxide powder, characterized in that 2 to 30 parts by weight of fatty acid is included based on 100 parts by weight of the titanium dioxide in the second step.
  7. 제4항에 있어서,According to clause 4,
    상기 제3단계에서 가열은 100 내지 150 ℃로 가열되는 것을 특징으로 하는 이산화티탄 분체의 제조방법.A method for producing titanium dioxide powder, characterized in that heating in the third step is heated to 100 to 150 ° C.
  8. 제1항 내지 제3항 중 어느 한 항 기재의 이산화티탄 분체를 포함하는 화장료.A cosmetic comprising the titanium dioxide powder according to any one of claims 1 to 3.
PCT/KR2022/018298 2022-09-06 2022-11-18 Aluminum-free, fatty acid-coated titanium dioxide powder and manufacturing method therefor WO2024053786A1 (en)

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