公开(公告)号：US5525649A

公开(公告)日：1996-06-11

申请号：US442703

申请日：1995-05-17

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

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

IPC: C09D5/23 ,  G11B5/706 ,  G11B5/84 ,  G11B5/842 ,  H01F41/16 ,  C08L27/06

CPC classification number: G11B5/84 ,  G11B5/706 ,  G11B5/842 ,  H01F41/16

Abstract: Disclosed herein in are a magnetic paint composed of a kneaded composition comprising fine magnetic iron based alloy particles, acicular fine magnetic iron oxide particles or plate-like fine magnetic ferrite particles, a binder resin and an organic solvent, the solid content of the fine magnetic iron based alloy particles, the acicular fine magnetic iron oxide particles or plate-like fine magnetic ferrite particles and the binder resin in the kneaded composition being from 65 to 85% by weight, the binder resin being from 5 to 30% by weight based on the fine magnetic iron based alloy particles, the acicular fine magnetic iron oxide particles or plate-like fine magnetic ferrite particles, and a gloss at 45.degree. after dispersion for 6 hours being not less than 120% when formed into a coating film; and a method of preparing the same.

Abstract translation: 本发明公开了一种磁性涂料，其由包含细磁铁基合金颗粒，针状细磁铁氧化物颗粒或板状细磁铁氧体颗粒，粘合剂树脂和有机溶剂的捏合组合物组成，精细磁性固体含量 铁基合金粒子，针状细磁铁氧体粒子或板状细磁铁氧体粒子和捏合组合物中的粘合剂树脂为65〜85重量％，粘合剂树脂为5〜30重量％，基于 细磁铁基合金颗粒，针状细磁铁氧体颗粒或板状细磁铁氧体颗粒，分散6小时后45度的光泽度在形成涂膜时不小于120％; 及其制备方法。

公开(公告)号：US5411801A

公开(公告)日：1995-05-02

申请号：US24105

申请日：1993-02-23

Applicant: Torayuki Honmyo

Inventor： Torayuki Honmyo

IPC: C01G49/08 ,  G11B5/714 ,  C01G49/02

CPC classification number: C01G49/08 ,  G11B5/714 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/20 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/42 ,  Y10T428/2982

Abstract: Disclosed herein are a process for producing poreless plate-like magnetite particles which have as large a plate ratio (average particle diameter/thickness) as possible and which are discrete each other, the process comprising the step of: obtained by oxidizing a suspension containing FeCO.sub.3 obtained by reacting an aqueous ferrous salt solution and an aqueous alkali carbonate solution by passing an oxygen-containing gas therethrough, wherein the suspension is obtained by reacting a ferrous salt solution containing 0.2 to 5.0 mol % of a ferric salt, calculated as Fe(III), based on Fe(II) and an aqueous alkali carbonate the amount of which is so controlled that the equivalent ratio of an alkali carbonate to the Fe(II) and Fe(III) in the aqueous ferrous salt solution is not less than 1 and the following general formula is satisfied: ##EQU1## and if necessary, 0.01 to 8.0 ml % of a water-soluble organic compound having a --COONa or --COOK group based on the Fe(II) and Fe(III) are added to any of the aqueous ferrous salt solution, the aqueous alkali carbonate solution and the suspension containing FeCO.sub.3 before the oxidation, and poreless plate-like magnetite particle which has as large a plate ratio and are discrete each other.

Abstract translation: 本文公开了一种生产无孔板状磁铁矿颗粒的方法，其具有尽可能大的板比（平均粒径/厚度）并且彼此离散，该方法包括以下步骤：通过氧化含有FeCO 3的悬浮液 其通过使含氧气体通过其中通过使含水亚铁盐水溶液和碱金属碳酸盐水溶液反应而获得，其中悬浮液通过使含有0.2至5.0摩尔％的铁盐的铁盐溶液（以Fe（III）计算） ），基于Fe（II）和碱金属碳酸盐水溶液，其量被控制为使碱金属碳酸盐与亚铁盐水溶液中的Fe（II）和Fe（III）的当量比不小于1 并且满足以下通式：将具有基于Fe（II）和Fe（III）的-COONa或-COOK基团的有机化合物加入到任何含水亚铁盐溶液中，aqueou 碱性碳酸盐溶液和氧化前含有FeCO3的悬浮液，以及具有大的板比并且彼此离散的无孔板状磁铁矿颗粒。

公开(公告)号：US5314750A

公开(公告)日：1994-05-24

申请号：US967522

申请日：1992-10-27

Applicant: Atsushi Takedoi ,  Mamoru Tanihara ,  Tosiharu Harada ,  Masaru Isoai ,  Kazuhiro Fujita

Inventor： Atsushi Takedoi ,  Mamoru Tanihara ,  Tosiharu Harada ,  Masaru Isoai ,  Kazuhiro Fujita

IPC: G11B5/706 ,  C01G49/02 ,  H01F1/06

CPC classification number: G11B5/70694 ,  Y10S428/90 ,  Y10T428/2982 ,  Y10T428/2991 ,  Y10T428/2993

Abstract: Disclosed herein are magnetic iron oxide particles which have a spindle shape and a substantially uniform particle size and shape, and are substantially free of dendrites and have a large axial ratio (major axial diameter/minor axial diameter) and an excellent print-through characteristic, and a method of producing the same.

Abstract translation: 本文公开了具有纺锤形状和基本上均匀的粒度和形状的磁性氧化铁颗粒，并且基本上没有树枝状结构并且具有大的轴向比（主轴向直径/次轴向直径）和优异的印刷特性， 及其制造方法。

公开(公告)号：US5260367A

公开(公告)日：1993-11-09

申请号：US744575

申请日：1991-08-13

Applicant: Tetsuro Toda ,  Atsunori Kishimoto

Inventor： Tetsuro Toda ,  Atsunori Kishimoto

IPC: C08K3/22 ,  C08K3/34 ,  F16F9/30

CPC classification number: F16F9/306 ,  C08K3/22 ,  C08K3/34

Abstract: Disclosed herein is a vehicle damping sheet comprising a blend-mixture comprising a filler composed of mica, iron oxide particles and a auxiliary filler, and a binder,each of the amounts of the mica, the iron oxide particles and the auxiliary filler being not less than 5 parts by weight based on 100 parts by weight of the binder, the total amount of the mica, the iron oxide particles and the auxiliary filler being not less than 30 parts by weight based on 100 parts by weight of the binder, and the content of the iron oxide particles in the blend-mixture being from 2 to 40% by weight.

Abstract translation: 本文公开了一种车辆阻尼片，其包含由云母，氧化铁颗粒和辅助填料构成的填料和粘合剂的混合物混合物，云母，氧化铁颗粒和辅助填料的量均不小于 相对于100重量份的粘合剂为5重量份以上，相对于100重量份的粘合剂，云母，氧化铁颗粒和辅助填料的总量不小于30重量份， 共混混合物中氧化铁颗粒的含量为2-40重量％。

公开(公告)号：US5236783A

公开(公告)日：1993-08-17

申请号：US657733

申请日：1991-02-20

Applicant: Koso Aoki ,  Masaaki Fukugauchi ,  Tomoyuki Imai ,  Nanao Horiishi ,  Kazuyuki Hayashi

Inventor： Koso Aoki ,  Masaaki Fukugauchi ,  Tomoyuki Imai ,  Nanao Horiishi ,  Kazuyuki Hayashi

IPC: G11B5/706 ,  G11B5/712

CPC classification number: G11B5/712 ,  G11B5/70694 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/259 ,  Y10T428/2991 ,  Y10T428/2993

Abstract: Disclosed herein is superparamagnetic fine particles of iron oxide having an unsaturated fatty acid adsorbed on the surface of superparamagnetic fine particles, and having a magnetization of not less than 50 emu/g, the rate of change of the magnetization of not more than 10%, and an Fe.sup.2+ content (calculated as Fe.sup.2+ /Fe.sup.3+ molar ratio) of 0.16-0.5.

公开(公告)号：US5198138A

公开(公告)日：1993-03-30

申请号：US773329

申请日：1991-10-11

Applicant: Shigehisa Yamamoto ,  Masaru Kawabata

Inventor： Shigehisa Yamamoto ,  Masaru Kawabata

IPC: H01F1/26 ,  H01F1/36 ,  H01F1/37

CPC classification number: H01F1/37 ,  H01F1/26 ,  H01F1/36

Abstract: Disclosed herein are ferrite particles for a bonded magnetic core comprising crystal grains of 5 to 15 .mu.m in average diameter, having an average particle diameter of 20 to 150 .mu.m and a magnetic permeability of not less than 24, and consisting essentially of 47 to 58 mol % of Fe.sub.2 O.sub.3, 10 to 30 mol % of nickel oxide, manganese oxide, nickel-managanese oxide (calculated as NiO, MnO or NiO.MnO) and 15 to 40 mol % of zinc oxide (calculated as ZnO).

Abstract translation: 本发明公开了一种粘结磁芯的铁氧体颗粒，其包含平均粒径为5〜15μm，平均粒径为20〜150μm，磁导率不低于24的晶粒，基本上由47〜 58mol％的Fe 2 O 3，10〜30mol％的氧化镍，氧化锰，镍锰氧化物（以NiO，MnO或NiO.MnO计）和15〜40mol％的氧化锌（以ZnO计）。

公开(公告)号：US5196586A

公开(公告)日：1993-03-23

申请号：US742760

申请日：1991-08-09

Applicant: Hiro Matsuda ,  Shuji Okada ,  Hachiro Nakanishi ,  Masao Kato ,  Minoru Ohsugi ,  Shigeru Takaragi ,  Nanao Horiishi

Inventor： Hiro Matsuda ,  Shuji Okada ,  Hachiro Nakanishi ,  Masao Kato ,  Minoru Ohsugi ,  Shigeru Takaragi ,  Nanao Horiishi

IPC: C07C43/225 ,  C07C211/52 ,  C08F138/00

CPC classification number: C07C43/225 ,  C07C211/52 ,  C08F138/00

Abstract: Disclosed herein are polydiphenyldiacetylenes having the following repeating unit (III): ##STR1## (wherein R.sup.1 denotes a hydrogen atom or a methoxy group; R.sup.2 denotes a hydrogen atom, a methoxy group or a methylamino group; R.sup.3 denotes a hydrogen atom or a trifluoromethyl group; and R.sup.4 denotes a hydrogen atom or a trifluoromethyl group; provided that R.sup.1 is not a hydrogen atom when R.sup.2 is hydrogen atom, and R.sup.3 is not a hydrogen atom when R.sup.4 is hydrogen atom).

Abstract translation: 本文公开了具有以下重复单元（III）的聚二苯基二乙炔：其中，R 1表示氢原子或甲氧基; R 2表示氢原子，甲氧基或甲基氨基; R 3表示氢原子 或三氟甲基; R 4表示氢原子或三氟甲基;条件是当R 2为氢原子时，R 1不为氢原子，当R 4为氢原子时，R 3不为氢原子）。

公开(公告)号：US5124207A

公开(公告)日：1992-06-23

申请号：US511285

申请日：1990-04-10

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

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

IPC: C01G49/00 ,  C01G49/04 ,  G11B5/706 ,  G11B5/712 ,  H01F1/11 ,  H01F1/34

CPC classification number: G11B5/70689 ,  G11B5/712 ,  Y10T428/2993

Abstract: Disclosed herein is a magnetic iron oxide particle comprising a magnetic iron oxide core particle containing ferrous iron, a Zn compound layer as a lower coating layer on the surface of said core particle, and an Si compound layer as an upper coating layer thereon.

公开(公告)号：US5079092A

公开(公告)日：1992-01-07

申请号：US556697

申请日：1990-07-24

Applicant: Masaaki Maekawa ,  Norimichi Nagai ,  Norio Sugita

Inventor： Masaaki Maekawa ,  Norimichi Nagai ,  Norio Sugita

IPC: G11B5/706

CPC classification number: G11B5/70678 ,  Y10T428/2982 ,  Y10T428/2991

Abstract: Disclosed herein are plate-like composite ferrite fine particles for magnetic recording comprising plate-like composite ferrite containing Ba fine particles which contain Ti of 2 to 5.0 atomic % based on Fe.sup.3+ and Ni in the range of 1.2.ltoreq.Ni/Ti.ltoreq.4 by molar ratio, which have zinc in the vicinity of the particles surfaces in the form of a solid solution, which have an average particle diameter of 0.01 .mu.m to 0.08 .mu.m, and the coercive force of which scarcely varies with the rise in temperature in the temperature range of -20.degree. C. to 120.degree. C., and a process for producing such plate-like composite ferrite fine particles.

公开(公告)号：US4959273A

公开(公告)日：1990-09-25

申请号：US408243

申请日：1989-09-18

Applicant: Atsushi Hamamura ,  Takaki Hamada ,  Kouki Tokuhara ,  Yukimitsu Miyao ,  Tomoyuki Imai ,  Nanao Horiishi

Inventor： Atsushi Hamamura ,  Takaki Hamada ,  Kouki Tokuhara ,  Yukimitsu Miyao ,  Tomoyuki Imai ,  Nanao Horiishi

IPC: C21D6/00 ,  C22C38/00 ,  C23C28/02 ,  C23C30/00 ,  C25D7/00 ,  H01F1/053 ,  H01F1/057 ,  H01F7/02 ,  H01F41/02

CPC classification number: H01F1/0577 ,  H01F41/026 ,  Y10S428/90 ,  Y10T428/12028 ,  Y10T428/12063 ,  Y10T428/1209

Abstract: A corrosion-resistant R-Fe-B type sintered permanent magnet exhibiting deterioration of not more than 5 % from the initial magnetic properties after being tested for 500 hours under the conditions of a temperature of 80.degree. C. and a relative humidity of 90 % is produced by:causing at least one colloidal noble metal selected from the group consisting of Pd, Ag, Pt and Au to be adsorbed in a colloidal state or forming a thin layer thereof through vapor deposition on the surface of the sintered body; applying at least one base metal selected from the group consisting of Ni, Cu, Sn and Co containing P and/or B by electroless plating; and further applying at least one base metal selected from the same group.The noble metal layer is 1-10 nm thick. The electroless plating layer is no more than 10 .mu.m and the electrolytic plating layer 5-60 .mu.m thick.