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公开(公告)号：JPH0873676A
公开(公告)日：1996-03-19
申请号：JP18826095
申请日：1995-06-29
Applicant: TODA KOGYO CORP
Inventor： FUJII YASUHIKO , HORAI SHIGERU , MORIYA TOMOHISA , TODA TETSUO
IPC: C09K3/00 , C08J3/22 , C08K3/22 , C08L23/10 , C08L25/00 , C08L53/00 , C08L55/00 , C08L55/02 , C08L69/00 , C08L71/00 , C08L71/12 , C08L101/00 , F16F15/02
Abstract: PURPOSE: To obtain a vibration damping material having large internal loss at nearly room temperature while keeping sufficient strength and hardness. CONSTITUTION: This vibration damping material comprises a blend of 100 pts.wt. of a binder resin consisting of 99-85wt.% of a base resin composed of one or two or more kinds of resins selected from a polypropylene resin, a polystyrene resin, an acrylonitrile-butadiene-styrene copolymer resin, a polycarbonate resin, a polyphenylene ether resin and a modified polyphenylene ether resin and 1-15wt.% of a styrene-isoprene-styrene block copolymer resin with 1-20 pts.wt. of iron oxide particle powder. The vibration damping material is obtained by adding 1-30wt.% of master batch pellets for vibration damping materials obtained by blending 100 pts.wt. of a binding material resin composed of a base resin and a styrene-isoprene-styrene block copolymer resin with 50-300 pts.wt. of oxide particle powder consisting essentially of iron to 99-70wt.% of a base resin and kneading and molding the blend.
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公开(公告)号：JPH0486749A
公开(公告)日：1992-03-19
申请号：JP20362590
申请日：1990-07-30
Applicant: TODA KOGYO CORP , UNITIKA LTD
Inventor： HAKATA TOSHIYUKI , HORAI SHIGERU , TODA TETSUO , FUJIOKA KAZUO , ECHIGO YOSHIAKI , SAKAIDA TSUTOMU
Abstract: PURPOSE:To provide the carrier which has a small bulk density, large saturation magnetization and can be controlled in electrostatic charge quantity by consisting this carrier of ferromagnetic fine particles and a cured phenolic resin and coating the particle surfaces of specific composite particles with one or >= 2 kinds of the resins selected from an epoxy resin, etc. CONSTITUTION:This carrier consists of the feromagnetic fine particles and the cured phenolic resin and has 10 to 1000 mum number average particle size and bulk density. In addition, the particle surface of the composite particles having 80 to 99 wt.% content of the ferromagnetic fine particles are coated with one or >= 2 kinds of the resins selected from the epoxy resin, polyester resin, styrene resin, silicon resin, and fluororesin. This carrier has the small bulk density and has the large saturation magnetization as the content of the magnetic particles in high. In addition, the electrostatic charge quantity is freely controllable by the kinds, etc., of the resin, with which the particle surfaces of the composite particles are coated.
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23.发明专利Ferrite particle powder for bonded magnets, resin composition for bonded magnets, and compact using them 有权用于粘结磁体的粉状颗粒粉末，用于粘结磁体的树脂组合物和使用它们的压缩
公开(公告)号：JP2008277792A
公开(公告)日：2008-11-13
申请号：JP2008088151
申请日：2008-03-28
Applicant: Toda Kogyo Corp , 戸田工業株式会社
Inventor： FUJII YASUHIKO , OSUGI MINORU , NISHIO YASUSHI , KOYAMA YOSUKE , HORAI SHIGERU
CPC classification number: H01F1/01 , C01G49/0036 , C01P2002/52 , C01P2006/10 , C01P2006/12 , C01P2006/42 , C09C1/22 , H01F1/113 , H01F1/42 , H01F41/0273 , Y10T428/2982
Abstract: PROBLEM TO BE SOLVED: To provide ferrite particle powder for bonded magnets, capable of obtaining a bonded magnet compact with good mechanical strength and superior magnetic characteristics of molded products, a resin composition for the bonded magnets, and a bonded magnet compact, such as a magnet roll that uses the ferrite particle powder and the composition.
SOLUTION: Ferrite particle powder for bonded magnets, a resin composition for the bonded magnets, and a magnet roll have a particle size distribution, with a mean volume diameter controlled from 2.1 μm to 2.7 μm and the standard deviation σ of the particle size distribution controlled from 1.4 to 1.9.
COPYRIGHT: (C)2009,JPO&INPITAbstract translation: 解决问题的方案为了提供能够获得机械强度和模制品的优异磁特性的粘结磁体压块，粘结磁体用树脂组合物和粘结磁体压块的粘结磁体用铁氧体颗粒粉末， 例如使用铁氧体颗粒粉末和组合物的磁辊。 解决方案：用于粘结磁体的铁氧体颗粒粉末，粘结磁体用树脂组合物和磁辊具有粒径分布，平均体积直径控制在2.1μm至2.7μm，颗粒的标准偏差σ 尺寸分布从1.4到1.9。 版权所有（C）2009，JPO＆INPIT
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公开(公告)号：JP2003342468A
公开(公告)日：2003-12-03
申请号：JP2003073892
申请日：2003-03-18
Applicant: Toda Kogyo Corp , 戸田工業株式会社
Inventor： ARAKI TAKAHIRO , HORAI SHIGERU , OSUGI MINORU , OBARA TAKASADA
Abstract: PROBLEM TO BE SOLVED: To provide a resin composition for a bonded magnet excellent in moldability, and a bonded magnet excellent in mechanical strength and heat resistance. SOLUTION: This resin composition comprises a magnetic powder and an aromatic polyamide resin. The polyamide resin has such characteristics that the molar ratio of the amount of remaining terminal carboxyl groups to that of remaining terminal amino groups is 1.0 or lower or that an aliphatic diamine component for producing the polyamide resin comprises a linear diamine and a branched diamine, the molar ratio of the content of the linear diamine to that of the branched diamine being less than 4.0. COPYRIGHT: (C)2004,JPO
Abstract translation: 要解决的问题：提供一种成型性优异的粘结磁体用树脂组合物和机械强度和耐热性优异的粘结磁体。 解决方案：该树脂组合物包含磁性粉末和芳族聚酰胺树脂。 聚酰胺树脂具有以下特征：残留的末端羧基的量与剩余的末端氨基的摩尔比为1.0以下，或用于制造聚酰胺树脂的脂肪族二胺成分含有直链二胺和支链二胺， 线性二胺与支链二胺的含量的摩尔比小于4.0。 版权所有（C）2004，JPO
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公开(公告)号：JPH07252385A
公开(公告)日：1995-10-03
申请号：JP6999694
申请日：1994-03-14
Applicant: TODA KOGYO CORP
Inventor： FUJII YASUHIKO , HORAI SHIGERU , TODA TETSUO
Abstract: PURPOSE:To obtain a vibration damper which has a high loss factor and a suitable flexibility and of which the peak of the loss factor can be controlled to be at a desired temp. in the range of 10-60 T by molding a compsn. comprising an inorg. filler and a specific resin binder in a specified wt. ratio. CONSTITUTION:This vibration damper is obtd. by molding a compsn. comprising 100 pts.wt. resin binder and 30-250 pts.wt. inorg. filler. The binder is prepd. by compounding 100 pts.wt. ethylene-vinyl acetate copolymer, 1O-500 pts.wt. petroleum resin, and 5-600 pts.wt. brominated epoxy resin. The peak of the loss factor of the damper is at a temp. in the range of 10-60 deg.C corresponding to the amt. of at least either the petroleum resin or the brominated epoxy resin compounded in the range of 100-620 pts.wt. based on 100 pts.wt. ethylene- vinyl acetate copolymer.
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Patent Agency Ranking
公开(公告)号：JPH0414055A
公开(公告)日：1992-01-20
申请号：JP11821890
申请日：1990-05-07
Applicant: TODA KOGYO CORP , UNITIKA LTD
Inventor： HORAI SHIGERU , TODA TETSUO , FUJIOKA KAZUO , HAKATA TOSHIYUKI , ECHIGO YOSHIAKI , SAKAIDA TSUTOMU , ASAMI KEIICHI
Abstract: PURPOSE:To lower the bulk density of a carrier, to increase a saturated magnetization and to increase the electric resistance by forming complex particles from a specific high magnetic fine particles and a phenol resin and covering the particle surface with a specified polymer. CONSTITUTION:This magnetic carrier has 10-1000mum of a number mean particle size, and of a bulk density. The surface of the complex particle (A) with a content of 80-99 wt.% of fine particles of high magnetic material, is covered with an acrylonitrile type polymer. The particle A is composed of the fine particles of high magnetic material and a cured phenol resin and this particle A is preferred to produce by reacting a phenol group with an aldehyde group in the presence of that fine particles, a suspension stabilizer and a basic catalyst. Also in a water type medium an acrylonitrile monomer if polymerized and the particle A is preferred to be covered with it.
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公开(公告)号：JPH0411624A
公开(公告)日：1992-01-16
申请号：JP11443290
申请日：1990-04-27
Applicant: TODA KOGYO CORP
Inventor： HORAI SHIGERU , HAKATA TOSHIYUKI , TODA TETSUO
IPC: G03G9/083 , C08G59/00 , C08G59/18 , C08G65/28 , C08K9/04 , C08K9/06 , C08L63/00 , C09C3/10 , G03G9/08 , G03G9/113 , H01F1/00 , H01F1/36
Abstract: PURPOSE:To obtain the title powder having an extensively controllable particle size and a high content of inorganic particles by producing and curing an epoxy resin in the presence of inorganic particles whose surfaces are rendered oleophilic. CONSTITUTION:The surfaces of inorganic particles (e.g. magnetite particles) are rendered oleophilic by, for example, mixing them with an oleophilic agent (e.g. isopropyltriisostearoyl titanate). A bisphenol and an epihalohydrin are reacted and cured in the presence of the oleophilic particles in an alkaline aqueous medium, or an uncured epoxy resin is cured in the presence of these particles in an aqueous medium. In this way, epoxy resin powder containing 80-99wt.% inorganic particles whose surfaces are rendered oleophilic and having a number-average particle diameter of 1-1000mum can be obtained. This powder can be desirably used as a powder for developing an electrostatic latent image or the like.
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公开(公告)号：JPH03192268A
公开(公告)日：1991-08-22
申请号：JP33324389
申请日：1989-12-21
Applicant: UNITIKA LTD , TODA KOGYO CORP
Inventor： ECHIGO YOSHIAKI , SAKAIDA TSUTOMU , ASAMI KEIICHI , TODA TETSUO , FUJIOKA KAZUO , HAKATA TOSHIYUKI , HORAI SHIGERU
Abstract: PURPOSE:To obtain low bulk density, high saturation magnetization and high electric resistance by coating the surfaces of composite particles consisting of a specified amt. of ferromagnetic fine particles and cured phenol resin and having a specified number average particle size and specified bulk density with melamine resin. CONSTITUTION:The surfaces of composite particles consisting of 80-99wt.% ferromagnetic fine particles and cured phenol resin and having 10-1,000mum number average particle size and bulk density are coated with melamine resin to obtain a magnetic carrier for electrophotography having low bulk density and high electric resistance due to coating with melamine resin. The magnetization value of the carrier is made as high as possible because of the high content of ferromagnetic fine particles.
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29.发明专利
公开(公告)号：JPH03152553A
公开(公告)日：1991-06-28
申请号：JP29169189
申请日：1989-11-08
Applicant: TODA KOGYO CORP
Inventor： HORAI SHIGERU , HAKATA TOSHIYUKI , FUJIOKA KAZUO , TODA TETSUO
Abstract: PURPOSE:To obtain excellent flowability by forming the above magnetic powder of the fine particles of a ferromagnetic material subjected to a treatment for hydrophobicity impartation on the surface and a cured phenolic resin and specifying the average particle size thereof to 1 to 10 mum, the bulk density to and the content of the fine particles of the ferromagnetic material to 80 to 99 wt.%. CONSTITUTION:The content of the fine particles of the ferromagnetic material can be increased in the case of subjecting phenols and aldehydes to reaction curing in an aq. medium in the presence of the fine particles of the ferromagnet ic material and a basic catalyst. The average particle size of the formed compos ite particle is controlled to 1 to 10mum when the fine particles of the ferromagnet ic material subjected to the treatment for hydrophobicity impartation on the surface are used as the fine particles of the ferromagnetic material at the time of the reaction curing. The composite particles having bulk density and 80 to 99 wt.% content of the fine particles of the ferromagnetic material are obtd. The content of the fine particles of the ferromagnetic material is increased in this way and the flowability of the composite particles is improved.
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公开(公告)号：JP2004193441A
公开(公告)日：2004-07-08
申请号：JP2002361617
申请日：2002-12-13
Applicant: Toda Kogyo Corp , 戸田工業株式会社
Inventor： KARIYA KOTARO , HORAI SHIGERU , OSUGI MINORU
Abstract: PROBLEM TO BE SOLVED: To provide a magnet roll which has a high magnet force, superior positioning precision of magnet poles and deflecting precision. SOLUTION: A resin magnet composition and a magnet roll using the same are composed of magnetic powder, a polyolefin-based thermoplastic resin, and polyglycerin condensed fatty acid esters of 0.05-5.0 parts by weight to the magnetic powder of 100 parts by weight, and as necessary, polyethylene of a molecular weight of 900 to 5000 of 0.1 to 5.0 wt.% is added. COPYRIGHT: (C)2004,JPO&NCIPI
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