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1.发明申请BINDER COMPOSITION FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM 有权用于磁记录介质和磁记录介质的粘合剂组合物公开(公告)号：US20110076517A1
公开(公告)日：2011-03-31
申请号：US12892669
申请日：2010-09-28
CPC分类号： G11B5/7023 , C08F220/18 , C08F220/26 , C08F220/58 , C08F230/02 , C08G18/6229 , G11B5/7021 , G11B5/714
摘要： An aspect of the present invention relates to a binder composition for a magnetic recording medium, which comprises a vinyl copolymer comprising a structural unit denoted by general formula [1],: wherein, in general formula [1], R1 denotes a hydrogen atom, a halogen atom, or a methyl group, L1 denotes a single bond or a divalent linking group, and Y an alicyclic group; a structural unit denoted by general formula [2]: wherein, in general formula [2], R2 denotes a hydrogen atom, a halogen atom, or a methyl group, L2 denotes a single bond or a divalent linking group, and Z denotes a hydrocarbon group with a carbon number ranging from 8 to 50; and a structural unit denoted by general formula [3]: wherein, in general formula [3], R3 denotes a hydrogen atom, a halogen atom, or a methyl group, and L3 denotes a single bond or a divalent linking group.
摘要翻译： 本发明的一个方面涉及一种用于磁记录介质的粘合剂组合物，其包含由通式[1]表示的结构单元的乙烯基共聚物，其中通式[1]中，R 1表示氢原子， 卤原子或甲基，L1表示单键或二价连接基，Y表示脂环族基; 由通式[2]表示的结构单元：其中，通式[2]中，R 2表示氢原子，卤素原子或甲基，L 2表示单键或二价连接基，Z表示 碳数为8至50的烃基; 和由通式[3]表示的结构单元：其中，通式[3]中，R3表示氢原子，卤素原子或甲基，L3表示单键或二价连接基团。
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2.发明授权Binder composition for magnetic recording medium and magnetic recording medium 有权用于磁记录介质和磁记录介质的粘合剂组合物公开(公告)号：US08501331B2
公开(公告)日：2013-08-06
申请号：US12892669
申请日：2010-09-28
IPC分类号： G11B5/702
CPC分类号： G11B5/7023 , C08F220/18 , C08F220/26 , C08F220/58 , C08F230/02 , C08G18/6229 , G11B5/7021 , G11B5/714
摘要： A binder composition for a magnetic recording medium contains a vinyl copolymer having a structural unit of general formula [1]: wherein R1 is H, halogen, or methyl, L1 is a single bond or a divalent linking group, and Y is an alicyclic group; a structural unit of general formula [2]: wherein R2 is H, halogen, or methyl, L2 is a single bond or a divalent linking group, and Z is a hydrocarbon group with a carbon number of from 8 to 50; and a structural unit of general formula [3]: wherein R3 is H, halogen, or methyl, and L3 is a single bond or a divalent linking group.
摘要翻译： 用于磁记录介质的粘合剂组合物含有具有通式[1]结构单元的乙烯基共聚物：其中R1为H，卤素或甲基，L1为单键或二价连接基团，Y为脂环族基团 ; 通式[2]的结构单元：其中R2为H，卤素或甲基，L2为单键或二价连接基团，Z为碳原子数为8〜50的烃基; 和通式[3]的结构单元：其中R3是H，卤素或甲基，L3是单键或二价连接基团。
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3.发明授权Binder composition for magnetic recording medium and magnetic recording medium 有权用于磁记录介质和磁记录介质的粘合剂组合物公开(公告)号：US08597805B2
公开(公告)日：2013-12-03
申请号：US13077337
申请日：2011-03-31
IPC分类号： G11B5/706
CPC分类号： G11B5/7023 , C08F220/28 , C08F220/58 , C08F226/10 , C08F2220/1891 , G11B5/70678 , G11B5/714
摘要： A binder composition for a magnetic recording medium contains a vinyl copolymer having structural units denoted by each of formulas [1], [2] and [3]. In formula [1], R1 is hydrogen, halogen, or methyl, L1 is a single bond or a divalent linking group, and Y is an alicyclic group. In formula [2], R2 is hydrogen, halogen, or methyl, L2 is a single bond or a divalent linking group, and Z is a hydrocarbon group with a carbon number of from 8 to 50. In formula [3], R3 is hydrogen, halogen, or methyl, and L3 is a single bond or a divalent linking group:
摘要翻译： 用于磁记录介质的粘合剂组合物包含具有由式[1]，[2]和[3]各自表示的结构单元的乙烯基共聚物。 在式[1]中，R 1是氢，卤素或甲基，L 1是单键或二价连接基，Y是脂环基。 在式[2]中，R 2为氢，卤素或甲基，L 2为单键或二价连接基，Z为碳数为8〜50的烃基。在式[3]中，R 3为 氢，卤素或甲基，L3为单键或二价连接基团：
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4.发明授权公开(公告)号：US08883329B2
公开(公告)日：2014-11-11
申请号：US12791529
申请日：2010-06-01
IPC分类号： G11B5/708 , G11B5/706 , B82Y30/00 , C01G49/00 , C04B35/26 , C04B35/628 , C04B35/653 , H01F1/11 , H01F41/16
CPC分类号： G11B5/70678 , B82Y30/00 , C01G49/0036 , C01P2002/52 , C01P2004/64 , C01P2006/42 , C04B35/2633 , C04B35/2683 , C04B35/6281 , C04B35/62886 , C04B35/653 , C04B2235/3215 , C04B2235/3251 , C04B2235/3274 , C04B2235/3275 , C04B2235/3284 , C04B2235/3409 , C04B2235/5292 , C04B2235/5409 , C04B2235/5454 , C04B2235/767 , H01F1/11 , H01F41/16 , Y10T428/2982
摘要： An aspect of the present invention relates to a hexagonal ferrite magnetic powder manufactured by a glass crystallization method as well as having an average plate diameter ranging from 15 to 25 nm, an average plate ratio ranging from 2.0 to 2.8 and a coercive force (Hc) ranging from 159 to 279 kA/m.
摘要翻译： 本发明的一个方面涉及通过玻璃结晶法制造的平均板直径为15〜25nm，平均板比例为2.0〜2.8，矫顽力（Hc）的六方晶系铁氧体磁粉， 范围从159到279 kA / m。
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5.发明申请METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM MANUFACTURED BY THE SAME 审中-公开制造磁记录介质的方法和由其制造的磁记录介质公开(公告)号：US20090092857A1
公开(公告)日：2009-04-09
申请号：US12244556
申请日：2008-10-02
CPC分类号： G11B5/70 , G11B5/70678 , G11B5/714 , G11B5/842 , G11B5/845
摘要： The present invention relates to a method of manufacturing a magnetic recording medium comprising coating a magnetic layer coating liquid comprising a ferromagnetic hexagonal ferrite powder and a binder to form a coating film, subjecting the coating film to orientation processing while the coating film is still wet, and drying the coating film to form a magnetic layer. The magnetic layer coating liquid is prepared by subjecting a ferromagnetic hexagonal ferrite powder with an average plate diameter of 10 to 50 nm to a dry comminution step, subjecting the ferromagnetic hexagonal ferrite powder to a first dispersion step together with a binder to prepare a dispersion liquid, and sequentially subjecting the dispersion liquid obtained to a second dispersion step and a filtering step. The dispersion liquid obtained by the first dispersion step comprises a dry solid component in an amount, as measured after filtration, of 15 percent or less.
摘要翻译： 磁记录介质的制造方法技术领域本发明涉及一种磁记录介质的制造方法，其特征在于，包括含有铁磁性六角铁氧体粉末和粘合剂的磁性层涂布液，形成涂膜，在涂膜仍然是湿的同时对涂膜进行取向处理， 并干燥涂膜以形成磁性层。 通过对平均板直径为10〜50nm的铁磁性六方晶系铁氧体粉末进行干式粉碎步骤，将铁磁六方铁氧体粉末与粘合剂一起进行第一分散工序，制备磁性层涂布液，制备分散液 依次对得到的分散液进行第二分散工序和过滤工序。 通过第一分散步骤获得的分散液含有在过滤后测得的干固体成分为15％或更低的量。
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6.发明申请MAGNETIC RECORDING MEDIUM, MAGNETIC SIGNAL REPRODUCTION SYSTEM AND MAGNETIC SIGNAL REPRODUCTION METHOD 审中-公开磁记录介质，磁信号再现系统和磁信号再现方法公开(公告)号：US20090174970A1
公开(公告)日：2009-07-09
申请号：US12295510
申请日：2007-03-30
CPC分类号： G11B5/70 , G11B5/70678 , G11B5/714
摘要： The present invention relates to a magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a nonmagnetic support. The magnetic layer has a thickness ranging from 30 to 130 nm, and a glossiness of the magnetic layer surface ranges from 155 to 270 percent.
摘要翻译： 本发明涉及一种在非磁性载体上依次包含非磁性粉末和粘合剂的非磁性层和包含铁磁粉末和粘结剂的磁性层的磁记录介质。 磁性层的厚度为30〜130nm，磁性层的光泽度为155〜270％。
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公开(公告)号：US07005203B2
公开(公告)日：2006-02-28
申请号：US10653932
申请日：2003-09-04
IPC分类号： G11B5/702
CPC分类号： G11B5/7021 , G11B5/70 , G11B5/7023 , G11B5/725
摘要： Provided is a magnetic recording medium that exhibits excellent electromagnetic characteristics especially in recording and reproducing systems using an MR head, as well as has excellent long-term preservation property. The magnetic recording medium comprises a lower layer comprising a nonmagnetic powder or a ferromagnetic powder and a binder and at least one magnetic layer thereover comprising a ferromagnetic powder and a binder on a support. Said binder comprised in the lower layer and/or magnetic layer comprises a polyurethane, said polyurethane is polyurethane (1) prepared from a chain extending agent, an organic diisocyanate, and a polyester polyol which comprises a dibasic acid component and a diol component, wherein the dibasic acid component comprises an aliphatic dibasic acid component and 70 molar percent or more of the diol component is derived from a diol having an alkyl branched side chain comprising two or more carbon atoms without a ring structure, or said polyurethane is polyurethane (2) prepared from a chain extending agent which comprises an alkyl branched aliphatic diol comprising three or more of total carbon atoms in a branched side chain per molecule, an organic diisocyanate, and a polyester polyol which comprises a dibasic acid component and a diol component, wherein the dibasic acid component comprises an aliphatic dibasic acid component and 70 molar percent or more of the diol component is derived from an alkyl branched aliphatic diol having a branched side chain of which total carbon atoms per molecule is two or more, and magnitude of saturation magnetic flux density (φm) ranges from 150 to 400 G·μm.
摘要翻译： 提供了一种磁记录介质，其特别是在使用MR磁头的记录和再现系统中具有优异的电磁特性，并且具有优异的长期保存性能。 磁记录介质包括由非磁性粉末或铁磁性粉末和粘结剂构成的下层，以及至少一个包含铁磁粉末和载体上的粘合剂的磁性层。 包含在下层和/或磁性层中的所述粘合剂包括聚氨酯，所述聚氨酯是由链增长剂，有机二异氰酸酯和包含二元酸组分和二醇组分的聚酯多元醇制备的聚氨酯（1），其中 二元酸组分包含脂族二元酸组分，并且70摩尔％或更多的二醇组分衍生自具有烷基支链侧链的二醇，其具有两个或多个没有环结构的碳原子，或者所述聚氨酯是聚氨酯（2） 由包含分子中支链侧链中总共碳原子数三个以上的烷基支链脂肪族二醇，有机二异氰酸酯和含有二元酸成分和二醇成分的聚酯多元醇构成的链延长剂制备，其中， 二元酸组分包含脂族二元酸组分，70摩尔％或更多的二元醇组分衍生自fr 具有每分子总碳原子数为2以上的支链侧链的烷基支链脂族二醇，饱和磁通密度（phim）的量级为150〜400Ggm。
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公开(公告)号：US5908683A
公开(公告)日：1999-06-01
申请号：US844388
申请日：1997-04-18
CPC分类号： G11B5/70 , G11B5/733 , G11B5/738 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording medium comprises a non-magnetic substrate, a lower coating layer, which is overlaid upon the non-magnetic substrate and primarily contains a binder and inorganic particles dispersed in the binder, and a magnetic layer, which is overlaid upon the lower coating layer and is constituted of at least a single layer. The magnetic layer contains at least a binder and ferromagnetic metal particles dispersed in the binder. The thickness of the magnetic layer falls within the range of 0.05 .mu.m to 0.5 .mu.m. The surface roughness of a top magnetic layer is at most 3 nm. The lower coating layer contains a fatty acid. An increase in the number of small protrusions, which have a height of at least 30 nm, does not occur substantially on the surface of the magnetic layer after the magnetic recording medium has been stored for seven days under environmental conditions of a temperature of 60.degree. C. and a relative humidity of 90%.
摘要翻译： 磁记录介质包括非磁性基底，下涂层，其覆盖在非磁性基底上并且主要包含分散在粘合剂中的粘合剂和无机颗粒以及覆盖在下涂层上的磁性层 层，并且由至少单层构成。 磁性层至少包含粘合剂和分散在粘合剂中的强磁性金属颗粒。 磁性层的厚度在0.05μm〜0.5μm的范围内。 顶层磁性层的表面粗糙度为3nm以下。 下涂层含有脂肪酸。 在磁记录介质已经在温度为60°的环境条件下储存了七天之后，磁性层的表面上基本上没有出现高度至少为30nm的小突起的数量的增加。 C.相对湿度为90％。
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公开(公告)号：US20060188653A1
公开(公告)日：2006-08-24
申请号：US11342563
申请日：2006-01-31
CPC分类号： B05D1/40 , B29D17/005 , B29L2017/005 , G11B7/266
摘要： A blade coating method using a plurality of blades for applying coating liquid on surfaces of disk-like flat substrates to thereby form coating layers on to-be-coated surfaces of the flat substrates respectively, the method comprising: the attaching step as defined herein; and the moving step as defined herein; wherein after a first one of the blades applies the coating liquid on a surface of a disk-like flat substrate in a direction, the first blade retracts and a second one of the blades applies the coating liquid on a surface of a next disk-like flat substrate in a direction reverse to the direction applied by the first blade.
摘要翻译： 一种叶片涂布方法，其使用多个叶片，用于将涂覆液体涂覆在盘状平坦基板的表面上，从而在平坦基板的待涂覆表面上分别形成涂层，所述方法包括：如本文所定义的附着步骤; 和如本文所定义的移动步骤; 其中在所述叶片中的第一个沿着一个方向将所述涂覆液体施加到所述盘状平坦基板的表面上之后，所述第一刮刀缩回，并且所述刀片中的第二刀片将涂覆液体施加到下一个盘状平板 平面基板在与第一叶片施加的方向相反的方向上。
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公开(公告)号：US20060182875A1
公开(公告)日：2006-08-17
申请号：US11350809
申请日：2006-02-10
摘要： The present invention provides a method for manufacturing a disc-shaped information medium that has, on a substrate, a printable layer containing at least a base layer and an ink-receiving layer. The method comprises, performing a liquid spread prevention treatment at an outer peripheral region, which is from an outer peripheral end portion of the substrate to an outer peripheral end portion of the ink-receiving layer; and coating an ink-receiving layer coating liquid for forming the ink-receiving layer onto the base layer to form the printable layer.
摘要翻译： 本发明提供一种盘形信息介质的制造方法，该方法在基板上具有至少包含基层和油墨接收层的可印刷层。 该方法包括：在从基板的外周端部到油墨接收层的外周端部的外周区域进行液体扩散防止处理; 并将用于形成油墨接收层的油墨接受层涂布液涂覆到基层上以形成可印刷层。
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