公开(公告)号：US5133805A

公开(公告)日：1992-07-28

申请号：US611280

申请日：1990-11-09

Applicant: Tokihiro Kurata ,  Tsutomu Katamoto ,  Nanao Hiriishi ,  Masao Kiyama

Inventor： Tokihiro Kurata ,  Tsutomu Katamoto ,  Nanao Hiriishi ,  Masao Kiyama

IPC: C01G49/06 ,  C08K7/00 ,  C09C1/24 ,  C09D5/36 ,  C09D7/12

CPC classification number: B82Y30/00 ,  C01G49/06 ,  C08K7/00 ,  C09C1/245 ,  C09D5/36 ,  C09D7/1216 ,  C09D7/1275 ,  C09D7/1283 ,  C09D7/1291 ,  C01P2002/72 ,  C01P2002/84 ,  C01P2004/03 ,  C01P2004/20 ,  C01P2004/50 ,  C01P2004/52 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/42 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64 ,  C01P2006/65 ,  C01P2006/66 ,  C08K3/22

Abstract: Disclosed herein are plate-like hematite particles having an average particle diameter of 0.5 to 5.0 .mu.m, a lamellar thickness of 50 to 500.ANG. and a plate ratio (the ratio of the average particle diameter to the lamellar thickness) of 50:1 to 500:1, an iron oxide pigment showing a golden color and comprising the plate-like hematite particles, and a process for producing the plate-like hematite particles.

Abstract translation: 本发明公开了平均粒径为0.5〜5.0μm，片层厚度为50〜500，板比（平均粒径与层状厚度的比例）为50:1的板状赤铁矿粒子，相对于 500:1，显示金色的氧化铁颜料，并且包含板状赤铁矿颗粒，以及制备板状赤铁矿颗粒的方法。

公开(公告)号：US5093100A

公开(公告)日：1992-03-03

申请号：US493121

申请日：1990-03-15

Applicant: Hideaki Sadamura ,  Atsushi Takedoi

Inventor： Hideaki Sadamura ,  Atsushi Takedoi

IPC: C01G49/06 ,  C01G49/08 ,  C09D5/32 ,  H01F1/00 ,  H01F1/11

CPC classification number: C09D5/32 ,  C01G49/06 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/20 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/42

Abstract: Disclosed herein are poreless, non-sintered plate-like magnetite particles having an average particle diameter of more than 0.5 .mu.m and not more than 2.0 .mu.m, and a BET specific surface area of not more than 6.0 m.sup.2 /g, and poreless, non-sintered plate-like maghemite particles having an average particle diameter of more than 0.5 .mu.m and not more than 2.0 .mu.m, and a BET specific surface area of not more than 6.0 m.sup.2 /g.

公开(公告)号：US5091012A

公开(公告)日：1992-02-25

申请号：US714174

申请日：1991-06-14

Applicant: Tatsuya Nakamura

Inventor： Tatsuya Nakamura

IPC: C01B13/36 ,  C01G51/00 ,  C09C1/36

CPC classification number: C09C1/36 ,  C01B13/36 ,  C01G51/00 ,  C01P2002/32 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62

Abstract: Disclosed herein are cobalt titanate particles having an average particle diameter in the range of 0.5-2.0 .mu.m, said particles being mono-dispersed and having uniform particle size distribution.

公开(公告)号：US5061570A

公开(公告)日：1991-10-29

申请号：US594159

申请日：1990-10-09

Applicant: Akihiro Nishimura ,  Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Yasuyuki Tanaka ,  Hiroko Itamochi

Inventor： Akihiro Nishimura ,  Kazuyuki Hayashi ,  Keisuke Iwasaki ,  Yasuyuki Tanaka ,  Hiroko Itamochi

IPC: C08G63/685 ,  C08G63/688 ,  C09D5/23 ,  C09D167/00 ,  G11B5/702

CPC classification number: G11B5/7023 ,  Y10S428/90 ,  Y10T428/31786

Abstract: A magnetic recording medium comprising a substrate, and a magnetic recording layer composed of a coating composition containing a binder resin and magnetic particles, the binder resin being a polyester having an iminosulfonyl group, is disclosed. The magnetic recording medium has excellent magnetic characteristics.

公开(公告)号：US4873010A

公开(公告)日：1989-10-10

申请号：US039775

申请日：1987-04-15

Applicant: Atsushi Takedoi ,  Hiroyuki Kondo ,  Masaru Isoai ,  Yoshitaka Yoshinaga ,  Tosiharu Harada ,  Yosiro Okuda ,  Hiroshi Sumita ,  Hirofumi Kawasaki ,  Kohji Mori

Inventor： Atsushi Takedoi ,  Hiroyuki Kondo ,  Masaru Isoai ,  Yoshitaka Yoshinaga ,  Tosiharu Harada ,  Yosiro Okuda ,  Hiroshi Sumita ,  Hirofumi Kawasaki ,  Kohji Mori

IPC: G11B5/706

CPC classification number: G11B5/70689 ,  G11B5/70652

Abstract: Disclosed herein are magnetic iron oxide particles comprising spindle-like magnetite or maghemite particles having an aspect ratio(major:minor) of less than 4:1 and containing 0.1 to 20 atomic % of Si to Fe, and a process for producing the same.

Abstract translation: 本文公开了包含具有小于4:1的纵横比（主要：次要）且包含0.1至20原子％的Si与Fe的纺锤状磁铁矿或磁赤铁矿颗粒的磁性氧化铁颗粒及其制备方法。

公开(公告)号：US4225352A

公开(公告)日：1980-09-30

申请号：US912737

申请日：1978-06-05

Applicant: Hajime Makino ,  Wataru Shinoda ,  Kazuhiro Yamamura

Inventor： Hajime Makino ,  Wataru Shinoda ,  Kazuhiro Yamamura

IPC: C01G49/00 ,  C09C1/00 ,  C09C1/22 ,  C09D5/00 ,  C09D5/02 ,  C09D5/08

CPC classification number: C09C1/22 ,  C09D5/084 ,  C01P2002/72 ,  C01P2004/61

Abstract: An anti-corrosive pigment comprises an ion oxide-calcium oxide sintered composite of an average particle size in a range of 0.7-7 .mu.m, which contains at least 25% by weight of 2CaO.Fe.sub.2 O.sub.3 and has a extremely low water-solubility of calcium content. An anti-corrosive aqueous paints contains the above pigment and has a superior storage stability without causing a gellation.

Abstract translation: 防腐颜料包括平均粒度在0.7-7μm范围内的离子氧化物 - 氧化钙烧结复合体，其含有至少25重量％的2CaO·Fe 2 O 3，并且具有极低的水溶性 钙含量。 抗腐蚀性水性涂料含有上述颜料，并且具有优异的储存稳定性而不引起凝胶化。

公开(公告)号：US4136049A

公开(公告)日：1979-01-23

申请号：US820811

申请日：1977-08-01

Applicant: Nanao Horiishi ,  Atushi Takedoi ,  Hiroyuki Kondo ,  Hiroshi Sumita ,  Akira Mukaizaka ,  Goro Matsui

Inventor： Nanao Horiishi ,  Atushi Takedoi ,  Hiroyuki Kondo ,  Hiroshi Sumita ,  Akira Mukaizaka ,  Goro Matsui

IPC: C01G49/08 ,  C01G49/00 ,  G11B5/706 ,  H01F1/11 ,  C01G49/06

CPC classification number: G11B5/70689

Abstract: A process for treating acicular magnetite containing Co to stabilize the magnetic properties thereof comprises the steps of heating acicular magnetite containing 0.1 to 2.5% by atom of Co with respect to Fe as starting material at a temperature in the range of 300 - 1000.degree. C in an inert gas atmosphere in which the partial pressure of oxygen is controlled at a value in the range of 0.001 - 1% by weight and for the time sufficient to homogenize the crystal structure of the acicular magnetite by thermal-diffusion of oxygen thereinto, and thereafter saturating the resultant acicular magnetite with oxygen by heating it at a temperature in the range of 40 - 100.degree. C in an oxygen rich atmosphere such as air.

公开(公告)号：US4133677A

公开(公告)日：1979-01-09

申请号：US783326

申请日：1977-03-31

Applicant: Goro Matsui ,  Koji Toda ,  Atushi Takedoi ,  Nanao Horiishi

Inventor： Goro Matsui ,  Koji Toda ,  Atushi Takedoi ,  Nanao Horiishi

IPC: B22F1/02 ,  B22F9/22 ,  H01F1/06 ,  C22C1/04

CPC classification number: B22F9/22 ,  B22F1/02 ,  H01F1/065

Abstract: The process for producing acicular magnetic metallic particle powder with improved magnetic properties which include the characteristic steps for producing the acicular particles of metal oxide with homogeneous and dense coats of crystalline silica and to thereby protect the particles from heat-damages during the reduction thereof under high temperatures.

Abstract translation: 制造具有改善的磁性能的针状磁性金属颗粒粉末的方法，其包括用均匀且致密的结晶二氧化硅涂层制造金属氧化物的针状颗粒的特征步骤，从而保护颗粒在高温下还原期间的热损伤 温度。

公开(公告)号：US20250011580A1

公开(公告)日：2025-01-09

申请号：US18292858

申请日：2022-07-26

Applicant: TODA KOGYO CORP.

Inventor： Takamoto KAWAGUCHI ,  Kousaku TAMARI ,  Kenichi NAKATA ,  Shinji UEMOTO ,  Shiori OSHIMO ,  Yoshiki KAWAI ,  Yuji MISHIMA ,  Masahiro KANEMITSU

IPC: C08K7/18

Abstract: A spherical strontium titanate fine particulate powder has a primary particle having an average primary particle size equal to or less than 50 nm. The spherical strontium titanate fine particulate powder has a ratio between the average primary particle size and a BET-converted particle size ranging from 0.85 to 1.25. The BET-converted particle size is derived from a BET specific surface area by using the expression 6000/(BET×5.13).

公开(公告)号：US11873230B2

公开(公告)日：2024-01-16

申请号：US16957711

申请日：2018-12-17

Applicant: TODA KOGYO CORP. ,  SAKAI CHEMICAL INDUSTRY CO., LTD.

Inventor： Koji Kakuya ,  Atsuko Yasunaga ,  Nobukatsu Shigi

IPC: C01F7/785 ,  C08L101/00 ,  B82Y30/00 ,  B82Y40/00

CPC classification number: C01F7/785 ,  C08L101/00 ,  B82Y30/00 ,  B82Y40/00 ,  C01P2002/60 ,  C01P2002/72 ,  C01P2004/64 ,  C01P2006/12

Abstract: A method for producing hydrotalcite particles includes dissolving aluminum hydroxide in an alkaline solution to prepare an aluminate solution, causing a reaction of the aluminate solution prepared in the first step with carbon dioxide to precipitate a low-crystallinity aluminum compound, causing a first-order reaction by mixing the low-crystallinity aluminum compound with a magnesium compound to prepare a reactant containing hydrotalcite nuclear particles, and causing a hydrothermal reaction of the reactant to synthesize hydrotalcite particles. The hydrotalcite particles can impart excellent heat resistance, transparency, flowability, and are useful as a resin stabilizer.