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13 条记录 (耗时 0.019 秒)

    Process for producing magnetizable particles
    1.
    发明授权
    Process for producing magnetizable particles 失效
    生产可磁化颗粒的方法

    公开(公告)号：US4457955A

    公开(公告)日：1984-07-03

    申请号：US454325

    申请日：1982-12-29

    申请人： Kazuo Okamura ,  Kohji Tamura ,  Shigeo Daimon ,  Yoshiyuki Shibuya

    发明人： Kazuo Okamura ,  Kohji Tamura ,  Shigeo Daimon ,  Yoshiyuki Shibuya

    IPC分类号： C01G51/00 ,  G11B5/706 ,  C01G49/06 ,  C01G49/08

    CPC分类号： C01G51/00 ,  C01G49/00 ,  C01G49/06 ,  G11B5/70673 ,  C01P2002/54 ,  C01P2006/42

    摘要： A process for producing cobalt-modified iron oxide particles, which comprises the steps of:(1) adding to magnetic iron oxide particles(a) a cobalt compound,(b) an iron component which is either (b.sub.1) a ferric compound at an atomic ratio to the cobalt compound in the range of 0.68 to 2 or (b.sub.2) a combination of a ferrous compound and a ferric compound, and(c) an alkali at a concentration enough to cause the cobalt and iron to precipitate as hydroxides; and(2) heating the mixture at a temperature of at least 50.degree. C. and not higher than the reflux temperature thereof in a non-oxidizing atmosphere.

    摘要翻译： 一种生产钴改性氧化铁颗粒的方法，包括以下步骤：（1）向磁性氧化铁颗粒（a）中加入钴化合物，（b）铁组分，其中（b1） 与钴化合物的原子比在0.68〜2的范围内，或（b2）亚铁化合物与三价铁化合物的组合，（c）以足以引起钴和铁作为氢氧化物析出的浓度的碱; 和（2）在非氧化性气氛中，在至少50℃，不高于其回流温度的温度下加热混合物。

    Particles containing iron carbide
    7.
    发明授权
    Particles containing iron carbide 失效
    含有碳化铁的颗粒

    公开(公告)号：US4900464A

    公开(公告)日：1990-02-13

    申请号：US944163

    申请日：1986-12-22

    申请人： Takuya Arase ,  Yoshiyuki Shibuya ,  Shigeo Daimon

    发明人： Takuya Arase ,  Yoshiyuki Shibuya ,  Shigeo Daimon

    IPC分类号： B01J27/22 ,  C01B31/30 ,  G11B5/706

    CPC分类号： B01J27/22 ,  C01B31/301 ,  G11B5/70615 ,  G11B5/70626 ,  G11B5/70642 ,  C01P2002/72 ,  C01P2002/77 ,  C01P2004/10 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/42 ,  C01P2006/80

    摘要： The present invention provides acicular particles (A) containing an iron carbide, which have (a) a free carbon content of at most 20 wt. %, and (b) an Fe.sub.5 C.sub.2 ratio(x) of at least 70% and a coercive force of 3x+300 to 7x+270 Oe, the ratio(x) being expressed by ##EQU1## wherein S1 is the X-ray diffraction strength of Fe.sub.5 C.sub.2, and S2 is the X-ray diffraction strength of Fe.sub.3 O.sub.4. The invention further provides particles (B) containing nickel and an iron carbide. The invention further provides acicular particles containing an iron carbide which are obtained by heating an aqueous dispersion of ferric hydroxide in an alkaline system in the presence of a water-soluble compound capable of coordinating to iron to obtain acicular .alpha.-ferric oxide and contacting the product with a carbon-containing reducing-and-carburizing agent or with a mixture of the agent and a carbon-free reducing agent, with or without contacting the product with the carbon-free reducing agent. These particles (A) to (C) are controllable in coercive force and usable for magnetic record media of various standards.

    Particles containing iron carbide
    8.
    发明授权
    Particles containing iron carbide 失效
    含有碳化铁的颗粒

    公开(公告)号：US5437805A

    公开(公告)日：1995-08-01

    申请号：US134873

    申请日：1993-10-12

    申请人： Takuya Arase ,  Yoshiyuki Shibuya ,  Shigeo Daimon

    发明人： Takuya Arase ,  Yoshiyuki Shibuya ,  Shigeo Daimon

    IPC分类号： B01J27/22 ,  C01B31/30 ,  G11B5/706

    CPC分类号： B01J27/22 ,  C01B31/301 ,  G11B5/70615 ,  G11B5/70626 ,  G11B5/70642 ,  C01P2002/72 ,  C01P2002/77 ,  C01P2004/10 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/42 ,  C01P2006/80

    摘要： The present invention provides acicular particles (A) containing an iron carbide, which have (a) a free carbon content of at most 20 wt. %, and (b) and Fe.sub.5 C.sub.2 ratio(x) of at least 70% and a coercive force of 3.times.+300 to 7.times.+270 Oe, the ratio(x) being expressed by ##EQU1## where S1 is the X-ray diffraction strength of Fe.sub.5 C.sub.2, and S2 is the X-ray diffraction strength of Fe.sub.3 O.sub.4.The invention further provides particles (B) containing nickel and an iron carbide.The invention further provides acicular particles containing an iron carbide which are obtained by heating an aqueous dispersion of ferric hydroxide in an alkaline system in the presence of a water-soluble compound capable of coordinating to iron to obtain acicular .alpha.-ferric oxide and contacting the product with a carbon-containing reducing-and-carburizing agent or with a mixture of the agent and a carbon-free reducing agent, with or without contacting the product with the carbon-free reducing agent.These particles (A) and (C) are controllable in coercive force and usable for magnetic record media of various standards.

    摘要翻译： 本发明提供了含有碳化铁的针状粒子（A），其具有（a）游离碳含量至多为20重量％ ％，（b）和Fe5C2比（x）至少为70％，矫顽力为3x + 300〜7×270ee，比例（x）由表示，其中S1为X射线衍射 Fe5C2的强度，S2是Fe3O4的X射线衍射强度。 本发明还提供含有镍和碳化铁的颗粒（B）。 本发明还提供了含有碳化铁的针状颗粒，其通过在碱性体系中在能够与铁配位的水溶性化合物的存在下加热氢氧化铁的水分散体而获得，得到针状的α-氧化铁并与产物接触 与含碳还原和渗碳剂或与该试剂和不含碳的还原剂的混合物，与或不使该产物与无碳还原剂接触。 这些颗粒（A）和（C）在矫顽力方面是可控的，可用于各种标准的磁记录介质。

    Polymer containing perfluoroalkyl group, process for preparing the same and coating composition
    9.
    发明授权
    Polymer containing perfluoroalkyl group, process for preparing the same and coating composition 失效
    含全氟烷基的聚合物，其制备方法和涂料组合物

    公开(公告)号：US4255299A

    公开(公告)日：1981-03-10

    申请号：US105259

    申请日：1979-12-19

    申请人： Shigeo Daimon ,  Kazuo Okamura

    发明人： Shigeo Daimon ,  Kazuo Okamura

    IPC分类号： B08B3/08 ,  B01D12/00 ,  C08F8/18 ,  C08F8/30 ,  C08F8/34 ,  C08F8/24 ,  C08F222/06

    CPC分类号： C08F8/34 ,  C08F8/18 ,  C08F8/30

    摘要： A polymer containing perfluoroalkyl group in its side chain which is an addition reaction product of a polymer having the following general formula: ##STR1## wherein R is phenyl group or alkoxyl group having 1 to 12 carbon atoms, R.sup.1 is alkyl group having 1 to 12 carbon atoms, and n is an integer of 10 to 2,000, with an epoxy compound selected from the group consisting of ##STR2## wherein R.sub.f is perfluoroalkyl group having 3 to 20 carbon atoms and R.sup.2 is alkyl group having 1 to 12 carbon atoms, the addition reaction product containing 0.1 to 50% by mole of the group derived from the epoxy compound having the formulae (IIa) to (IIc) per 1 mole of the recurring unit of the polymer having the formula (I). The polymer is good in compatibility with film-forming resins and solvents and improves the leveling property of a coating composition when incorporated thereinto and the surface smoothness of the film obtained from the composition.

    摘要翻译： 在其侧链中含有全氟烷基的聚合物，其是具有以下通式的聚合物的加成反应产物：其中R是苯基或具有1至12个碳原子的烷氧基，其中R1是具有 1〜12个碳原子，n为10〜2,000的整数，选自由下列组成的组的环氧化合物：（IIa）（IIb）和（IIc）其中Rf是全氟烷基 碳原子数为3〜20，R 2为碳原子数1〜12的烷基，加成反应产物相对于每1摩尔含有式（IIa）〜（IIc）的环氧化合物的基团为0.1〜50摩尔％ 的具有式（I）的聚合物的重复单元。 该聚合物与成膜树脂和溶剂的相容性良好，并且当结合到涂料组合物中时改善涂料组合物的流平性和由组合物获得的膜的表面平滑度。

    Process of electrostatic printing with fluorinated polymer toner additive
    10.
    发明授权
    Process of electrostatic printing with fluorinated polymer toner additive 失效
    含氟聚合物调色剂添加剂的静电印刷工艺

    公开(公告)号：US4339518A

    公开(公告)日：1982-07-13

    申请号：US195076

    申请日：1980-10-08

    申请人： Kazuo Okamura ,  Shigeo Daimon ,  Nobuyuki Tomihashi

    发明人： Kazuo Okamura ,  Shigeo Daimon ,  Nobuyuki Tomihashi

    IPC分类号： G03G9/087 ,  G03G13/22 ,  G03G13/26 ,  G03G13/16

    CPC分类号： G03G9/08791 ,  G03G13/22 ,  G03G13/26 ,  G03G9/0872 ,  G03G9/08728

    摘要： A process of electrostatic printing which comprises the steps of forming a reverse image of a dielectric toner on an electroconductive support or a photoconductive support, fixing the reverse image to give an electrostatic printing master sheet, and conducting electrostatic printing in which electrification of the dielectric toner image on the master sheet, development with a toner, transfer of the resulting toner image to a material to be printed and fixing are repeatedly carried out to give numerous sheets of duplicates.

    摘要翻译： 一种静电印刷方法，其包括以下步骤：在导电载体或光电导载体上形成电介质调色剂的反向图像，固定反转图像以产生静电印刷母版，并进行静电印刷，其中介电调色剂 在母版上的图像，用调色剂显影，将所得到的调色剂图像转印到待印刷和定影的材料上，重复进行以产生多张复制品。