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公开(公告)号：US5686012A
公开(公告)日：1997-11-11
申请号：US522723
申请日：1995-09-01
CPC分类号： B82Y30/00 , C09C3/006 , C09C3/12 , C09D7/1225 , C09D7/1275 , G11B5/712 , C01P2004/10 , C01P2004/20 , C01P2004/32 , C01P2004/38 , C01P2004/41 , C01P2004/42 , C01P2004/50 , C01P2004/54 , C01P2004/61 , C01P2004/62 , C01P2004/64 , C01P2004/80 , C01P2006/12 , C01P2006/60 , C01P2006/82 , C08K3/22 , C08K9/08 , Y10T428/2991 , Y10T428/2998
摘要： The disclosure describes modified particles comprising inorganic particles as core particles, and at least one polysiloxane modified with at least one selected from the group consisting of polyethers, polyesters and aralkyls, which is coated on the surfaces of said core particles.
摘要翻译： 本公开内容描述了包含无机颗粒作为核心颗粒的改性颗粒和至少一种被选自聚醚，聚酯和芳烷基中的至少一种的聚硅氧烷，其被涂覆在所述芯颗粒的表面上。
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2.发明授权Non-magnetic undercoating layer for magnetic recording medium, magnetic recording medium and non-magnetic particles 失效用于磁记录介质的非磁性底涂层，磁记录介质和非磁性颗粒
公开(公告)号：US5830557A
公开(公告)日：1998-11-03
申请号：US392199
申请日：1995-02-22
申请人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Minoru Ohsugi , Hiroko Morii , Mineko Sakoda , Norio Sugita , Masaaki Maekawa
发明人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Minoru Ohsugi , Hiroko Morii , Mineko Sakoda , Norio Sugita , Masaaki Maekawa
CPC分类号： G11B5/738 , G11B5/733 , Y10S428/90 , Y10T428/24372 , Y10T428/2438 , Y10T428/24388 , Y10T428/265 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995
摘要： The disclosure describes a non-magnetic undercoating layer for a magnetic recording medium, coated on the surface of a non-magnetic substrate comprising: non-magnetic particles selected from the group consisting of particles (1) and (2): (1) coated acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles which are produced by adhering not less than 0.01 to 20 wt % (calculated as Al, SiO.sub.2 or Al and SiO.sub.2, and based on acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material) of an oxide or a hydroxide containing Al, Si or both Al and Si to the surfaces of acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material, and have a molecular weight-dependent parameter .alpha. represented by the following formula of not less than 0.5: As=K.sub.1 .multidot.M.sup..alpha. wherein M represents the number-average molecular weight of a binder resin, As represents the saturation adsorption of said binder resin, and K.sub.1 represents a constant used for measuring As and dependent on the binder resin and a solvent, (2) BaO.multidot.4.5Fe.sub.2 O.sub.3 particles having an average particle diameter of not more than 0.1 .mu.m; and a binder resin.
摘要翻译： 本发明描述了一种涂覆在非磁性基材表面上的用于磁记录介质的非磁性底涂层，包括：选自颗粒（1）和（2）的非磁性颗粒：（1）涂覆 通过粘附不小于0.01至20重量％（以Al，SiO 2或Al和SiO 2计算，并以针状或纺锤形α-Fe2O3颗粒为核心材料）制备的针状或纺锤状α-Fe2O3颗粒， 含有Al，Si或Al和Si的氧化物或氢氧化物作为核心材料的针状或纺锤形α-Fe2O3颗粒的表面，并且具有不低于下列公式的分子量依赖参数α 比0.5：As =K1xMα其中M表示粘合剂树脂的数均分子量，As表示所述粘合剂树脂的饱和吸附，K1表示用于测量As的常数，并且取决于粘合剂树脂和溶剂， （ 2）平均粒径不大于0.1μm的BaO x 4.5 Fe 2 O 3粒子; 和粘合剂树脂。
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3.发明授权Non-magnetic undercoat layer for magnetic recording medium, magnetic recording medium and non-magnetic particles 失效用于磁记录介质的非磁性底涂层，磁记录介质和非磁性颗粒
公开(公告)号：US5604015A
公开(公告)日：1997-02-18
申请号：US240512
申请日：1994-05-10
申请人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Minoru Ohsugi , Hiroko Morii , Mineko Sakoda , Norio Sugita , Masaaki Maekawa
发明人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Minoru Ohsugi , Hiroko Morii , Mineko Sakoda , Norio Sugita , Masaaki Maekawa
CPC分类号： G11B5/738 , G11B5/733 , Y10S428/90 , Y10T428/24372 , Y10T428/2438 , Y10T428/24388 , Y10T428/265 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995
摘要： The disclosure describes a non-magnetic undercoating layer for a magnetic recording medium, coated on the surface of a non-magnetic substrate comprising:non-magnetic particles selected from the group consisting of particles (1) and (2):(1) coated acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles which are produced by adhering not less than 0.01 to 20 wt % (calculated as Al, SiO.sub.2 or Al and SiO.sub.2, and based on acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material) of an oxide or a hydroxide containing Al, Si or both Al and Si to the surfaces of acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material, and have a molecular weight-dependent parameter .alpha. represented by the following formula of not less than 0.5:As=K.sub.1 .multidot.M.sup..alpha.wherein M represents the number-average molecular weight of a binder resin, As represents the saturation adsorption of said binder resin, and K.sub.1 represents a constant used for measuring As and dependent on the binder resin and a solvent,(2) BaO.4.5Fe.sub.2 O.sub.3 particles having an average particle diameter of not more than 0.1 .mu.m; anda binder resin.
摘要翻译： 本发明描述了一种涂覆在非磁性基材表面上的用于磁记录介质的非磁性底涂层，包括：选自颗粒（1）和（2）的非磁性颗粒：（1）涂覆 通过粘附不小于0.01至20重量％（以Al，SiO 2或Al和SiO 2计算，并以针状或纺锤形α-Fe2O3颗粒为核心材料）制备的针状或纺锤状α-Fe2O3颗粒， 含有Al，Si或Al和Si的氧化物或氢氧化物作为核心材料的针状或纺锤形α-Fe2O3颗粒的表面，并且具有不低于下列公式的分子量依赖参数α 比0.5：As =K1xMα其中M表示粘合剂树脂的数均分子量，As表示所述粘合剂树脂的饱和吸附，K1表示用于测量As的常数，并且取决于粘合剂树脂和溶剂， （ 2）平均粒径不大于0.1μm的BaO.4.5Fe2O3颗粒; 和粘合剂树脂。
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4.发明授权Non-magnetic coated particles having a defined parameter .alpha. of not less than 0.5 失效具有不小于0.5的限定参数α的非磁性涂覆颗粒
公开(公告)号：US5882795A
公开(公告)日：1999-03-16
申请号：US392259
申请日：1995-02-22
申请人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Minoru Ohsugi , Hiroko Morii , Mineko Sakoda , Norio Sugita , Masaaki Maekawa
发明人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Minoru Ohsugi , Hiroko Morii , Mineko Sakoda , Norio Sugita , Masaaki Maekawa
CPC分类号： G11B5/738 , G11B5/733 , Y10S428/90 , Y10T428/24372 , Y10T428/2438 , Y10T428/24388 , Y10T428/265 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995
摘要： The disclosure describes a non-magnetic undercoating layer for a magnetic recording medium, coated on the surface of a non-magnetic substrate comprising:non-magnetic particles selected from the group consisting of particles (1) and (2):(1) coated acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles which are produced by adhering not less than 0.01 to 20 wt % (calculated as Al, SiO.sub.2 or Al and SiO.sub.2, and based on acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material) of an oxide or a hydroxide containing Al, Si or both Al and Si to the surfaces of acicular or spindle-shaped .alpha.-Fe.sub.2 O.sub.3 particles as a core material, and have a molecular weight-dependent parameter .alpha. represented by the following formula of not less than 0.5:As=K.sub.1 .multidot.M.sup..alpha. wherein M represents the number-average molecular weight of a binder resin, As represents the saturation adsorption of said binder resin, and K.sub.1 represents a constant used for measuring As and dependent on the binder resin and a solvent,(2) BaO.4.5Fe.sub.2 O.sub.3 particles having an average particle diameter of not more than 0.1 .mu.m; anda binder resin.
摘要翻译： 本发明描述了一种涂覆在非磁性基材表面上的用于磁记录介质的非磁性底涂层，包括：选自颗粒（1）和（2）的非磁性颗粒：（1）涂覆 通过粘附不小于0.01至20重量％（以Al，SiO 2或Al和SiO 2计算，并以针状或纺锤形α-Fe2O3颗粒为核心材料）制备的针状或纺锤状α-Fe2O3颗粒， 含有Al，Si或Al和Si的氧化物或氢氧化物作为核心材料的针状或纺锤形α-Fe2O3颗粒的表面，并且具有不低于下列公式的分子量依赖参数α 比0.5：As =K1xMα其中M表示粘合剂树脂的数均分子量，As表示所述粘合剂树脂的饱和吸附，K1表示用于测量As的常数，并且取决于粘合剂树脂和溶剂， （ 2）平均粒径不大于0.1μm的BaO.4.5Fe2O3颗粒; 和粘合剂树脂。
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5.发明授权公开(公告)号：US06767611B2
公开(公告)日：2004-07-27
申请号：US10152345
申请日：2002-05-22
IPC分类号： G11B5706
CPC分类号： G11B5/712 , Y10T428/256 , Y10T428/257 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995 , Y10T428/2996 , Y10T428/31663
摘要： A magnetic recording medium using black magnetic acicular composite particles produced by forming a single carbon black coat between the surface of magnetic acicular cobalt-coated iron oxide particle or magnetic acicular metal particle and a coating comprising at least one organosilicon compound, in an amount of from more than 10 to 40 parts by weight based on 100 parts by weight of the magnetic acicular particles, exhibits not only a smooth surface, a smaller light transmittance and a lower surface electrical resistivity value, but also a small friction coefficient and an excellent running durability.
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公开(公告)号：US06458453B1
公开(公告)日：2002-10-01
申请号：US09557881
申请日：2000-04-25
IPC分类号： G11B5708
CPC分类号： B82Y30/00 , C01P2004/03 , C01P2004/10 , C01P2004/20 , C01P2004/32 , C01P2004/41 , C01P2004/50 , C01P2004/51 , C01P2004/52 , C01P2004/54 , C01P2004/62 , C01P2004/64 , C01P2004/82 , C01P2004/86 , C01P2006/12 , C01P2006/40 , C01P2006/42 , C01P2006/60 , C01P2006/62 , C01P2006/80 , C09C1/24 , C09C3/006 , C09C3/12 , G11B5/708 , Y10T428/25 , Y10T428/2982 , Y10T428/2991 , Y10T428/2995
摘要： A magnetic recording medium composed of a non-magnetic base film and a magnetic recording layer containing a binder resin, magnetic particles, and as a filler black composite hematite particles having an average diameter of 0.08 to 1.0 &mgr;m. The composite particles have cores of hematite particles which are surface coated with an organosilicon compound. A carbon black coating is formed on the organosilicon coating layer. In addition, the hematite core particles may have an oxide or hydroxide coating layer formed on the surface of the hematite core particle, between the organosilicon coating layer and the surface of the core particles. The magnetic recording medium has not only an excellent durability and a good electromagnetic performance, but also a low light transmittance, a small surface resistivity and an excellent surface smoothness.
摘要翻译： 由非磁性基膜和含有粘合剂树脂，磁性颗粒和作为平均直径为0.08至1.0μm的填料黑色复合赤铁矿颗粒的磁记录层组成的磁记录介质。 复合颗粒具有表面涂覆有机硅化合物的赤铁矿颗粒核。 在有机硅涂层上形成炭黑涂层。 此外，赤铁矿芯颗粒可以在赤铁矿核心颗粒的表面，有机硅涂层和芯颗粒的表面之间形成氧化物或氢氧化物涂层。 磁记录介质不仅具有优异的耐久性和良好的电磁性能，而且具有低透光率，小的表面电阻率和优异的表面平滑度。
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7.发明授权Black magnetic acicular composite particles for magnetic recording medium and magnetic recording medium using the same 失效用于磁记录介质的黑色磁性针状复合颗粒和使用其的磁记录介质公开(公告)号：US06863966B1
公开(公告)日：2005-03-08
申请号：US09710834
申请日：2000-11-14
CPC分类号： G11B5/712 , Y10S428/90 , Y10S428/926 , Y10T428/257 , Y10T428/26 , Y10T428/2995
摘要： A magnetic recording medium comprises: a non-magnetic base film; and a magnetic recording layer comprising a binder resin and black magnetic acicular composite particles having an average particle diameter of 0.051 to 0.35 μm, comprising magnetic acicular cobalt-coated iron oxide particles or magnetic acicular metal particles containing iron as a main component, a coating formed on surface of the magnetic acicular particles, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtainable from alkoxysilane compounds, and (2) polysiloxanes or modified polysiloxanes, and a carbon black coat formed on the coating layer comprising said organosilicon compound, in an amount of from more than 10 to 40 parts by weight based on 100 parts by weight of said magnetic acicular particles. Such a magnetic recording medium exhibits not only a smooth surface, a smaller light transmittance and a lower surface electrical resistivity value, but also a small friction coefficient and an excellent running durability.
摘要翻译： 磁记录介质包括：非磁性基膜; 以及包含粘结剂树脂和平均粒径为0.051-0.35μm的黑色磁性针状复合颗粒的磁性记录层，包括磁性针状钴包覆氧化铁颗粒或以铁为主要成分的磁性针状金属颗粒，在表面上形成的涂层 包含至少一种选自以下的有机硅化合物：（1）由烷氧基硅烷化合物得到的有机硅烷化合物和（2）聚硅氧烷或改性聚硅氧烷，以及在包含所述有机硅的涂层上形成的炭黑涂层 化合物，相对于100重量份的所述磁针状颗粒，其含量为10-40重量份以上。这样的磁记录介质不仅表现出光滑的表面，较小的透光率和较低的表面电阻率值 ，而且摩擦系数小，运行耐久性好。
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8.发明授权Magnetic recording medium and magnetic composite particles or magnetic recording medium 失效磁记录介质和磁性复合颗粒或磁记录介质公开(公告)号：US06569530B2
公开(公告)日：2003-05-27
申请号：US10061357
申请日：2002-02-04
IPC分类号： G11B5706
CPC分类号： G11B5/712 , Y10T428/256 , Y10T428/257 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995 , Y10T428/2998
摘要： A magnetic recording medium comprises: a non-magnetic base film; and a magnetic recording layer comprising a binder resin and magnetic composite particles having an average particle diameter of 0.02 to 0.70 &mgr;m, comprising magnetic particles as core particles, a coating formed on surface of said magnetic particle, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtainable from alkoxysilane compounds, and (2) polysiloxanes or modified polysiloxanes, and a phthalocyanine-based pigments coat formed on said coating layer comprising said organosilicon compound, in an amount of 1 to 100 parts by weight based on 100 parts by weight of said magnetic particles.
摘要翻译： 磁记录介质包括：非磁性基膜; 以及包含粘合剂树脂的磁记录层和平均粒径为0.02-0.70μm的磁性复合颗粒，其包含作为核心颗粒的磁性颗粒，在所述磁性颗粒的表面上形成的涂层，包含至少一种选自以下的有机硅化合物： ：（1）由烷氧基硅烷化合物得到的有机硅烷化合物和（2）聚硅氧烷或改性聚硅氧烷，以及包含所述有机硅化合物的所述涂层上形成的酞菁类颜料涂层，其量为100至100重量份，基于100 所述磁性颗粒重量份。
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9.发明授权Black plate-shaped ferrite composite particles with magnet oplumbite structure and magnetic recording medium using the same 失效黑色板状铁氧体复合颗粒与磁铁石英结构和磁记录介质使用相同公开(公告)号：US06531211B1
公开(公告)日：2003-03-11
申请号：US09577939
申请日：2000-05-25
IPC分类号： G11B5706
CPC分类号： G11B5/712 , Y10T428/25 , Y10T428/2982 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995 , Y10T428/2998
摘要： Black plate-shaped ferrite composite particles with magnetoplumbite structure, particle size of 0.01 to 0.2 &mgr;m are surface coated with an organosilicon compound(s) and a carbon black coating is applied over the organosilicon coating layer. Optionally, a coating of silicon or aluminum oxide or hydroxide is provided on the surface of the black plate-shaped composite particles and below the organosilicon layer. The particles have a high blackness and when applied to a non-magnetic substrate with a binder resin to form a magnetic medium provide low light transmittance, low surface resistivity and a smooth surface.
摘要翻译： 具有磁铅矿结构的黑色板状铁素体复合颗粒，粒径为0.01至0.2μm的表面涂覆有机硅化合物，并在有机硅涂层上施加炭黑涂层。 任选地，在黑色板状复合颗粒的表面上和有机硅层下面提供硅或氧化铝或氢氧化物的涂层。 颗粒具有高的黑度，并且当用粘合剂树脂施加到非磁性基材以形成磁性介质时，提供低的透光率，低的表面电阻率和光滑的表面。
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10.发明授权Magnetic recording medium containing specific non-magnetic composite particles of coated hematite particles 失效磁记录介质含有特定的非磁性复合颗粒的涂覆赤铁矿颗粒公开(公告)号：US06511733B2
公开(公告)日：2003-01-28
申请号：US09805374
申请日：2001-03-14
申请人： Kazuyuki Hayashi , Mamoru Kamigaki , Hiroko Morii
发明人： Kazuyuki Hayashi , Mamoru Kamigaki , Hiroko Morii
IPC分类号： B32B516
CPC分类号： G11B5/735 , Y10T428/24421 , Y10T428/254 , Y10T428/257 , Y10T428/265 , Y10T428/2991 , Y10T428/2995 , Y10T428/2998
摘要： A magnetic recording medium comprises: a non-magnetic base film; a magnetic recording layer formed on one surface of the non-magnetic base film, comprising a binder resin and magnetic particles; and a back coat layer formed on a surface opposite of the non-magnetic base film to the surface on which the magnetic recording layer is formed, comprising a binder resin and plate-shaped non-magnetic composite particles having an average plate surface diameter of 0.1 to 5.0 &mgr;m, an average thickness of 0.001 to 0.1 &mgr;m and a plate ratio (average plate surface diameter/average thickness) of 5:1 to 100:1, wherein the plate-shaped non-magnetic composite particles comprise: plate-shaped hematite particles as core particles; a coating layer formed on surface of said plate-shaped hematite particle, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtained from an alkoxysilane compounds, and (2) polysiloxanes or modified polysiloxanes; and a carbon black coat formed on said coating layer comprising at least one organosilicon compound, in an amount of from more than 1 to 30 parts by weight based on 100 parts by weight of said plate-shaped hematite particles.
摘要翻译： 磁记录介质包括：非磁性基膜;在非磁性基膜的一个表面上形成的磁记录层，包括粘合剂树脂和磁性颗粒; 和在与非磁性基膜相对的表面上形成的背涂层与形成有磁记录层的表面形成，包括粘合剂树脂和板状非磁性复合材料颗粒，其平均板表面直径为0.1至 5.0μm，平均厚度为0.001〜0.1μm，板比（平均板面直径/平均厚度）为5:1〜100:1，其中板状非磁性复合颗粒包括：板状赤铁矿颗粒 作为核心颗粒; 所述板状赤铁矿颗粒的表面上形成的涂层包含至少一种选自以下的有机硅化合物：（1）由烷氧基硅烷化合物得到的有机硅烷化合物，和（2）聚硅氧烷或改性聚硅氧烷; 和基于100重量份的所述板状赤铁矿颗粒，在包含至少一种有机硅化合物的所述涂层上形成的炭黑涂层的量为大于1至30重量份。
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