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IRON OXIDE FOR ORANGE PIGMENT AND METHOD FOR PRODUCING SAME

Foreign code F190009852
File No. (S2017-0858-N0)
Posted date Jul 25, 2019
Country WIPO
International application number 2018JP010564
International publication number WO 2019123670
Date of international filing Mar 16, 2018
Date of international publication Jun 27, 2019
Priority data
  • P2017-244212 (Dec 20, 2017) JP
Title IRON OXIDE FOR ORANGE PIGMENT AND METHOD FOR PRODUCING SAME
Abstract Provided is an iron oxide which includes at least one element selected from the group consisting of aluminum, zirconium, ruthenium, titanium, and hafnium, and which has a tube-like or rod-like shape and an elemental ratio of the element in atom% of 25% or more (where the total atom% of the main elements excluding oxygen, carbon, nitrogen, and hydrogen is 100). Also provided is a pigment which comprises the iron oxide.
Outline of related art and contending technology BACKGROUND ART
Pigment, or coloring for a clay coating and resin, such as cosmetic has been widely used in industry. Or orange-based pigment is warm, and the organic compound and inorganic compound are also known. For the organic pigment is organic as a main component, having high heat resistance and cannot be used for the step. On the other hand, in the inorganic pigment, pigment yellow or orange system are many including cadmium, they are detrimental, and high temperature firing may be decomposed under the problem.
Therefore, the safety and excellent in heat resistance, as a bright orange color tone has been demanded the development of inorganic pigments. Orange-based pigments such as reported in Patent Document 1 and 2 respectively.
In Patent Document 1, the surfaces of particles of iron hydroxide particle powder containing the organic red pigment orange-based pigment adhered is reported. However, the surface of the pigment is used for the organic pigment is a problem such as low heat resistance. In addition, in Patent Document 2, zirconium, cerium, and terbium oxide is used exhibits orange yellow brown inorganic pigments have been reported. The pigment is excellent in heat-resistance, expensive rare earth element comprises terbium, raw material procurement and that there is a problem in terms of cost.
The inventors of the present invention, red iron oxide pigment, a powder of solid solution Al hematite is developed (Patent Document 3, Non-Patent Document 1). In addition, the inventors of the present invention, a conventional pigment of red iron oxide in powder form (tubular) shape is different from that of red iron oxide (Non-Patent Document 2) are developed. The tube-shaped red iron oxide, a naturally occurring microorganisms (bacteria leptothrix iron oxide, iron oxide formed by the tubular okurasea (Leptothrix ochracea) ) (Fe:Si:P=73 element ratio: 22:5) in air at about 800°C to be obtained by heating, as well as an excellent color tone, are excellent in heat resistance are found. Exhibits excellent color tone of the red iron oxide in the form of a tube is caused, the effect of a solid solution of Si (i), (ii) such as due to the tubular.
This tubular red iron oxide is the natural system, is nearly constant and the ratio of the constituent elements, Si or the solid solution of element P does not change, the color tone depends only on the heating temperature, in the case of a predetermined heating temperature is not possible to change the color.
Scope of claims (In Japanese)[請求項1]
 アルミニウム、ジルコニウム、ルテニウム、チタン及びハフニウムからなる群から選択される少なくとも1種の元素を含有する酸化鉄であって、
 形状がチューブ状又はロッド状であり、
 当該元素の元素比率が原子数%で25%以上である(ここで、酸素、炭素、窒素及び水素を除く主要元素の原子数%の合計を100とする)、酸化鉄。

[請求項2]
 更にケイ素及び/又はリンを含有する、請求項1に記載の酸化鉄。

[請求項3]
 α-Fe 2O 3を含む、請求項1又は2に記載の酸化鉄。

[請求項4]
 以下の工程を含む、アルミニウム、ジルコニウム、ルテニウム、チタン及びハフニウムからなる群から選択される少なくとも1種の元素を含有する酸化鉄の製造方法:
(1) 鉄酸化細菌を培養することにより有機鞘を生成する工程、及び
(2) 工程(1)で得られた有機鞘をアルミニウム、ジルコニウム、ルテニウム、チタン及びハフニウムからなる群から選択される少なくとも1種の元素、鉄並びに硫酸根を含む水溶液中に懸濁し、当該元素を含有する酸化鉄を生成する工程。

[請求項5]
 更に以下の工程を含む、請求項4に記載の方法:
(3) 工程(2)で得られた酸化鉄を加熱処理する工程。

[請求項6]
 加熱処理の温度が700~1100℃である、請求項5に記載の方法。

[請求項7]
 更に以下の工程を含む、請求項4~6のいずれか一項に記載の方法:
(4) 工程(2)又は(3)で得られた酸化鉄を粉砕する工程。

[請求項8]
 前記鉄酸化細菌が、レプトスリックス属に属する細菌である、請求項4~7のいずれか一項に記載の方法。

[請求項9]
 請求項1~3のいずれか一項に記載の酸化鉄を含む顔料。

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITY
  • Inventor
  • TAMURA, Katsunori
  • KUNOH, Tatsuki
  • NAKANISHI, Makoto
  • TAKADA, Jun
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG

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