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公开(公告)号：US4491619A
公开(公告)日：1985-01-01
申请号：US475708
申请日：1983-03-16
IPC分类号： C09C1/22 , C01G49/00 , C09C1/00 , C09C1/24 , C09C3/00 , C09C3/06 , C09D7/00 , C09D7/12 , B32B5/16
CPC分类号： C09C1/24 , C09C3/063 , C01P2006/12 , C01P2006/37 , Y10S428/90 , Y10T428/2991
摘要： Iron oxide particles containing at least 5% by weight of iron (II) content calculated as FeO are stabilized against atmospheric oxidation by a coating of at least one compound containing boron and those particles are useful as coloring pigments and magnetic particles in magnetic recording media.
摘要翻译： 含有至少5重量％的以FeO计算的铁（II）含量的氧化铁颗粒通过至少一种含有硼的化合物的涂层而稳定，防止大气氧化，并且这些颗粒可用作磁记录介质中的着色颜料和磁性颗粒。
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公开(公告)号：US4325739A
公开(公告)日：1982-04-20
申请号：US204682
申请日：1980-11-05
申请人： Hans-Peter Biermann , Helmut Steinberger , Artur Botta , Rolf Naumann , Lutz Leitner , Heinrich Heine
发明人： Hans-Peter Biermann , Helmut Steinberger , Artur Botta , Rolf Naumann , Lutz Leitner , Heinrich Heine
CPC分类号： H01F1/061 , B22F1/02 , Y10T428/257 , Y10T428/2995
摘要： A pigment of a magnetic metal or alloy thereof carrying, in about 0.2 to 30% of the weight of the metal or alloy, a coating of at least one member selected from the group consisting of an ortho-silicic acid ester, a hydrolyzate thereof and a condensation product thereof. Optionally it also carries a corrosion inhibitor. The coated pigment is produced by suspension of the untreated pigment in a liquid medium containing the ortho-silicic acid ester or derivative thereof, and optionally the corrosion inhibitor, followed by separation and drying at 50.degree. to 250.degree. C. The resulting pigment is non-pyrophoric and of high performance properties suitable for use in magnetic recording media.
摘要翻译： 一种磁性金属或其合金的颜料，以约0.2至30重量％的金属或合金的比例携带至少一种选自正硅酸酯，其水解产物和 其缩合产物。 任选地，它还带有腐蚀抑制剂。 涂覆的颜料通过将未处理的颜料悬浮在含有原硅酸酯或其衍生物的液体介质中，任选地是腐蚀抑制剂，然后在50至250℃下分离和干燥而制备。所得颜料为非 - 适用于磁记录介质的高性能特性。
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公开(公告)号：US4897166A
公开(公告)日：1990-01-30
申请号：US214769
申请日：1988-07-05
CPC分类号： C25D3/10 , B01D19/04 , B01D19/0418
摘要： Acidic liquids, such as galvanic electrolyte solutions for metal electroplating, contain a surfactant and a foam inhibiting agent which is a perfluoroalkyl-containing ester of phosphoric acid.
摘要翻译： 酸性液体，例如用于金属电镀的电解电解液，含有表面活性剂和泡沫抑制剂，其是磷酸的全氟烷基酯。
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公开(公告)号：US4470844A
公开(公告)日：1984-09-11
申请号：US324915
申请日：1981-11-25
CPC分类号： B22F1/0096 , G11B5/70621 , H01F1/061
摘要： Spherical agglomerates of surface-stabilized primary particles substantially consisting of iron, having a BET surface of about 5 to 50 m.sup.2 /g, measured on the agglomerate, in non-pyrophoric form and having a bulk density of about 0.5 to 2.0 kg/l and an agglomerate diameter of about 0.5 to 10 mm are produced by(a) reducing in dry phase particles consisting essentially of iron oxide,(b) intensively dispersing the particles in liquid phase,(c) coating the particles with an inorganic and/or organic coating optionally containing corrosion inhibitors,(d) separating the particles from the liquid phase by evaporating the volatile components with a continuously rotating and simultaneously tumbling movement, and(e) subjecting the resulting granulates to a thermal treatment. The particles are especially useful for the production of magnetic recording media.
摘要翻译： 基本上由铁组成的表面稳定的一次粒子的球形附聚物，具有约5至50m 2 / g的BET表面积，在附聚物上以非自燃形式测量，堆积密度为约0.5至2.0kg / l， 通过（a）在干相中还原基本上由氧化铁组成的颗粒，（b）将颗粒集中分散在液相中，（c）用无机和/或有机物涂覆颗粒，产生约0.5至10mm的团块直径 任选地含有腐蚀抑制剂的涂层，（d）通过以连续旋转和同时翻转的运动蒸发挥发性组分，和（e）使所得颗粒经受热处理，从而将颗粒与液相分离。 颗粒对于制造磁记录介质特别有用。
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公开(公告)号：US5185141A
公开(公告)日：1993-02-09
申请号：US484525
申请日：1990-02-26
CPC分类号： C09C1/24 , C01G49/06 , C01P2002/50 , C01P2004/10 , C01P2006/19 , C01P2006/62 , C01P2006/65
摘要： Low-silking iron oxide yellow pigments having improved color qualities are produced by a novel method which utilizes both precipitation process and the Penniman process. Pigments are nucleated and grown by precipitation to achieve multiplication factor of 2.5 to 7 and additional pigment growth is carried out by the Penniman process.
摘要翻译： 通过利用沉淀法和Penniman法两者的新方法制备具有改进颜色品质的低丝氧化铁黄色颜料。 颜料通过沉淀成核并生长，以实现2.5至7的倍增因子，并通过Penniman方法进行附加的颜料生长。
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