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1. 发明授权

US08597805B2 Binder composition for magnetic recording medium and magnetic recording medium 有权
标题翻译：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
申请人： Masataka Yoshizawa , Ayako Matsumoto , Satoshi Matsubaguchi
发明人： Masataka Yoshizawa , Ayako Matsumoto , Satoshi Matsubaguchi
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：

2. 发明授权

US08501331B2 Binder composition for magnetic recording medium and magnetic recording medium 有权
标题翻译：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
申请人： Masataka Yoshizawa , Masato Nagura , Satoshi Matsubaguchi , Ayako Matsumoto
发明人： Masataka Yoshizawa , Masato Nagura , Satoshi Matsubaguchi , Ayako Matsumoto
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。

3. 发明申请

US20050260456A1 Magnetic recording medium 审中-公开
标题翻译：磁记录介质
公开(公告)号：US20050260456A1
公开(公告)日：2005-11-24
申请号：US11132405
申请日：2005-05-19
申请人： Kazuko Hanai , Ayako Matsumoto
发明人： Kazuko Hanai , Ayako Matsumoto
IPC分类号： C08J7/04 , G11B5/70 , G11B5/716 , G11B5/73 , G11B5/738
CPC分类号： G11B5/7305 , G11B5/733
摘要： A magnetic recording medium comprising: a nonmagnetic support; and a magnetic layer containing ferromagnetic powder and a binder, wherein the nonmagnetic support contains polyester, the nonmagnetic support has gauche/trans peak intensity ratio of 0.50 or less as determined by a ATR-FT-IR method, and a shrinkage percentage of the magnetic recording medium after storage for 1 week under a conditions of 70° C. and 5% RH is 0.040% or less.
摘要翻译：一种磁记录介质，包括：非磁性载体; 以及含有铁磁性粉末和粘合剂的磁性层，其中，所述非磁性载体含有聚酯，所述非磁性载体具有通过ATR-FT-IR法测定的0.50或更小的gauche /反式峰强度比，并且磁性收缩率在70℃，5％RH的条件下保存1周后的记录介质为0.040％以下。

4. 发明授权

US08883329B2 Hexagonal ferrite magnetic powder and method of manufacturing the same, and magnetic recording medium and method of manufacturing the same 有权
标题翻译：六角铁氧体磁粉及其制造方法，磁记录介质及其制造方法
公开(公告)号：US08883329B2
公开(公告)日：2014-11-11
申请号：US12791529
申请日：2010-06-01
申请人： Satoshi Matsubaguchi , Ayako Matsumoto , Toshio Tada , Akira Manabe
发明人： Satoshi Matsubaguchi , Ayako Matsumoto , Toshio Tada , Akira Manabe
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。

5. 发明授权

US07092210B2 Magnetic recording and reproduction method 失效
标题翻译：磁记录和再现方法
公开(公告)号：US07092210B2
公开(公告)日：2006-08-15
申请号：US10890090
申请日：2004-07-14
申请人： Hitoshi Noguchi , Ayako Matsumoto , Shinji Saito
发明人： Hitoshi Noguchi , Ayako Matsumoto , Shinji Saito
IPC分类号： G11B5/82
CPC分类号： G11B5/016 , G11B5/012 , G11B5/58 , G11B5/82 , G11B2005/001 , G11B2005/0016
摘要： A magnetic recording and reproduction method comprising recording or reproducing a track of a rotating magnetic disk by means of a magnetic head, wherein the magnetic disk comprises a support and a magnetic layer containing ferromagnetic powder and a binder; the track has a breadth of 2 μm or less; and a frictional force between the magnetic layer and the magnetic head at innermost peripheral area of a recording region of the magnetic disk is 30 mN or less, a frictional force between the magnetic layer and a magnetic head at outermost peripheral area of a recording region of the magnetic disk is 20 mN or less, and a ratio of the frictional force at the innermost peripheral area to the frictional force at the outermost peripheral area is from 1.0 to 4.0.
摘要翻译：一种磁记录和再现方法，包括通过磁头记录或再现旋转磁盘的轨道，其中磁盘包括支撑件和包含铁磁粉末和粘合剂的磁性层; 轨道的宽度为2 mum以下; 并且在磁盘的记录区域的最内周区域的磁性层和磁头之间的摩擦力为30mN以下，磁性层与记录区域的最外周区域的磁头之间的摩擦力磁盘为20mN以下，最外围区域的摩擦力与最外周面积的摩擦力的比为1.0〜4.0。

6. 发明申请

US20110076517A1 BINDER COMPOSITION FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM 有权
标题翻译：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
申请人： Masataka YOSHIZAWA , Masato Nagura , Satoshi Matsubaguchi , Ayako Matsumoto
发明人： Masataka YOSHIZAWA , Masato Nagura , Satoshi Matsubaguchi , Ayako Matsumoto
IPC分类号： G11B5/702 , C08F32/08 , C08L75/00 , G11B5/706
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。

7. 发明申请

US20050013046A1 Magnetic recording and reproduction method 失效
标题翻译：磁记录和再现方法
公开(公告)号：US20050013046A1
公开(公告)日：2005-01-20
申请号：US10890090
申请日：2004-07-14
申请人： Hitoshi Noguchi , Ayako Matsumoto , Shinji Saito
发明人： Hitoshi Noguchi , Ayako Matsumoto , Shinji Saito
IPC分类号： G11B5/00 , G11B5/012 , G11B5/016 , G11B5/58 , G11B5/706 , G11B5/82
CPC分类号： G11B5/016 , G11B5/012 , G11B5/58 , G11B5/82 , G11B2005/001 , G11B2005/0016
摘要： A magnetic recording and reproduction method comprising recording or reproducing a track of a rotating magnetic disk by means of a magnetic head, wherein the magnetic disk comprises a support and a magnetic layer containing ferromagnetic powder and a binder; the track has a breadth of 2 μm or less; and a frictional force between the magnetic layer and the magnetic head at innermost peripheral area of a recording region of the magnetic disk is 30 mN or less, a frictional force between the magnetic layer and a magnetic head at outermost peripheral area of a recording region of the magnetic disk is 20 mN or less, and a ratio of the frictional force at the innermost peripheral area to the frictional force at the outermost peripheral area is from 1.0 to 4.0.
摘要翻译：一种磁记录和再现方法，包括通过磁头记录或再现旋转磁盘的轨道，其中磁盘包括支撑件和包含铁磁粉末和粘合剂的磁性层; 轨道的宽度为2 mum以下; 并且在磁盘的记录区域的最内周区域处的磁性层和磁头之间的摩擦力为30mN以下，磁性层与记录区域的最外周区域的磁头之间的摩擦力磁盘为20mN以下，最外围区域的摩擦力与最外周面积的摩擦力的比为1.0〜4.0。

8. 发明申请

US20110244270A1 BINDER COMPOSITION FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM 有权
标题翻译：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：US20110244270A1
公开(公告)日：2011-10-06
申请号：US13077337
申请日：2011-03-31
申请人： Masataka YOSHIZAWA , Ayako MATSUMOTO , Satoshi MATSUBAGUCHI
发明人： Masataka YOSHIZAWA , Ayako MATSUMOTO , Satoshi MATSUBAGUCHI
IPC分类号： G11B5/702 , C08F220/06 , G11B5/714
CPC分类号： G11B5/7023 , C08F220/28 , C08F220/58 , C08F226/10 , C08F2220/1891 , G11B5/70678 , 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。

9. 发明申请

US20100304187A1 HEXAGONAL FERRITE MAGNETIC POWDER AND METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME 有权
标题翻译：六角形铁素体磁粉及其制造方法和磁记录介质及其制造方法
公开(公告)号：US20100304187A1
公开(公告)日：2010-12-02
申请号：US12791529
申请日：2010-06-01
申请人： Satoshi MATSUBAGUCHI , Ayako Matsumoto , Toshio Tada , Akira Manabe
发明人： Satoshi MATSUBAGUCHI , Ayako Matsumoto , Toshio Tada , Akira Manabe
IPC分类号： H01F1/06 , H01F1/01 , G11B5/62
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。

10. 发明申请

US20090092857A1 METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM MANUFACTURED BY THE SAME 审中-公开
标题翻译：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
申请人： Ayako MATSUMOTO , Satoshi Matsubaguchi
发明人： Ayako MATSUMOTO , Satoshi Matsubaguchi
IPC分类号： G11B5/842 , G11B5/68
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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