公开(公告)号：US09177586B2

公开(公告)日：2015-11-03

申请号：US13121901

申请日：2009-09-30

申请人： Koichi Shimokawa ,  Katsushi Hamakubo ,  Kae Itoh

发明人： Koichi Shimokawa ,  Katsushi Hamakubo ,  Kae Itoh

IPC分类号： G11B5/65 ,  G11B5/84 ,  G11B5/86 ,  C10M107/38 ,  C10M171/02 ,  C10M177/00 ,  G11B5/725

CPC分类号： G11B5/725 ,  C10M107/38 ,  C10M171/02 ,  C10M177/00 ,  C10M2213/003 ,  C10M2213/0606 ,  C10N2220/021 ,  C10N2230/06 ,  C10N2240/204 ,  C10N2250/14 ,  C10N2280/00 ,  G11B5/82 ,  G11B5/8408 ,  G11B5/86

摘要： A magnetic disk having at least a magnetic layer, a carbon protective layer, and a lubrication layer sequentially provided on a substrate. The lubrication layer is a film formed by a lubricant that contains two types of compounds having a perfluoropolyether main chain in the structure, a molecular weight distribution of the two types in total being within a range of 1 to 1.2. The two types of compounds include a compound a having a hydroxyl group at the end and a compound b having a number average molecular weight smaller than the number average molecular weight of the compound a and not more than 1500. A content of the compound b in the two types of compounds is not more than 10%.

摘要翻译： 一种至少具有磁性层，碳保护层和依次设置在基板上的润滑层的磁盘。 润滑层是由结构中含有全氟聚醚主链的两种类型的化合物的润滑剂形成的膜，两种类型的分子量分布在1〜1.2的范围内。 两种类型的化合物包括末端具有羟基的化合物a和数均分子量小于化合物a的数均分子量且不大于1500的化合物b。化合物b的含量 两种类型的化合物不超过10％。

公开(公告)号：US07277254B2

公开(公告)日：2007-10-02

申请号：US11097283

申请日：2005-04-04

申请人： Koichi Shimokawa ,  Kota Hara

发明人： Koichi Shimokawa ,  Kota Hara

IPC分类号： G11B5/127 ,  G11B5/725

CPC分类号： G11B5/725 ,  G11B5/8408

摘要： A magnetic recording disk having a substrate, a magnetic layer formed on the substrate, a protective layer formed on the magnetic layer and a lubricant layer formed on the protective layer, the lubricant layer containing a perfluoropolyether compound having an end moiety containing a phosphazene ring and a perfluoropolyether compound having an end moiety containing a hydroxyl group, or the lubricant layer containing a perfluoropolyether compound having an end moiety containing a hydroxyl group on the protective layer side and a perfluoropolyether compound having an end moiety containing a phosphazene ring on the other surface side, and a process for manufacturing each of these magnetic recording disks.

摘要翻译： 一种磁记录盘，其具有基板，形成在基板上的磁性层，形成在磁性层上的保护层和形成在保护层上的润滑层，润滑层含有具有含有磷腈环的末端部分的全氟聚醚化合物和 具有包含羟基的末端部分的全氟聚醚化合物，或含有在保护层侧具有羟基的末端部分的全氟聚醚化合物的润滑剂层和在另一个表面侧具有含有磷腈环的末端部分的全氟聚醚化合物 ，以及这些磁记录盘的制造方法。

公开(公告)号：US07105241B2

公开(公告)日：2006-09-12

申请号：US10809352

申请日：2004-03-26

申请人： Koichi Shimokawa ,  Masafumi Ishiyama

发明人： Koichi Shimokawa ,  Masafumi Ishiyama

IPC分类号： G11B5/66 ,  G11B5/70

CPC分类号： G11B5/8408 ,  C10M107/38 ,  C10M171/04 ,  C10M2211/0425 ,  C10M2213/043 ,  C10N2220/021 ,  C10N2240/204 ,  C10N2250/121 ,  C10N2270/00 ,  G11B5/725

摘要： Disclosed is a method of manufacturing magnetic disks, comprising a magnetic layer, a protective layer, and a lubricating layer on a substrate. In the process, a lubricant alpha comprising a compound denoted by chemical formula HO—CH2—CH(OH)—CH2—O—CH2—CF2(—O—C2F4)p-(O—CF2)q-O—CF2—CH2—O—CH2—CH(OH)—CH2—OH wherein p and q are natural number,and a compound denoted by chemical formula HO—CH2—CF2(—O—C2F4)m-(O—CF2)n-O—CF2—CH2—OH wherein m and n are natural number,is fractionated by molecular weight to prepare a lubricant a having a weight average molecular weight (Mw) of from 3,000 to 7,000 and a molecular weight dispersion of less than or equal to 1.2;a lubricant beta comprising a compound denoted by the chemical formula HO—CH2—CF2(—O—C2F4)m-(O—CF2)n-O—CF2—CH2—OH wherein m and n are natural number,is fractionated by molecular weight to prepare a lubricant b having a weight average molecular weight (Mw) of from 2,000 to 5,000 and a molecular weight dispersion of less than or equal to 1.2;a lubricant c comprising a mixture of lubricants a and b is prepared; anda film of lubricant c is formed on a protective layer provided on a substrate to form a lubricating layer. A magnetic disk comprising a magnetic layer, a protective layer, and a lubricating layer on a substrate, in which the lubricating layer has been formed on the protective layer is also enclosed.

公开(公告)号：US08846137B2

公开(公告)日：2014-09-30

申请号：US12708050

申请日：2010-02-18

申请人： Koichi Shimokawa ,  Katsushi Hamakubo ,  Kae Itoh

发明人： Koichi Shimokawa ,  Katsushi Hamakubo ,  Kae Itoh

IPC分类号： G11B5/72 ,  G11B5/725 ,  G11B5/82 ,  G11B5/84

CPC分类号： G11B5/82 ,  G11B5/8408

摘要： On manufacturing a magnetic disk having at least a magnetic layer (60), a protective layer (70), and a lubricating layer (80) formed in this order over a substrate (10), the lubricating layer is formed by using a coating solution in which a perfluoropolyether compound having a perfluoropolyether main chain and a hydroxyl group in a structure thereof is dispersed and dissolved in a fluorine-based solvent having a boiling point of 90° C. or more.

摘要翻译： 在制造至少具有磁性层（60），保护层（70）和在基板（10）上依次形成的润滑层（80））的磁盘时，通过使用涂布液 其中具有全氟聚醚主链和羟基的全氟聚醚化合物在其结构中分散溶解在沸点为90℃以上的氟系溶剂中。

公开(公告)号：US20120127599A1

公开(公告)日：2012-05-24

申请号：US13121901

申请日：2009-09-30

申请人： Koichi Shimokawa ,  Katsushi Hamakubo ,  Kae Itoh

发明人： Koichi Shimokawa ,  Katsushi Hamakubo ,  Kae Itoh

IPC分类号： G11B21/04 ,  G11B5/84 ,  G11B5/725

CPC分类号： G11B5/725 ,  C10M107/38 ,  C10M171/02 ,  C10M177/00 ,  C10M2213/003 ,  C10M2213/0606 ,  C10N2220/021 ,  C10N2230/06 ,  C10N2240/204 ,  C10N2250/14 ,  C10N2280/00 ,  G11B5/82 ,  G11B5/8408 ,  G11B5/86

摘要： A magnetic disk is provided which is excellent in durability of the magnetic disk or particularly in LUL durability and CFT characteristics and has high reliability under a decreased floating amount of the magnetic head accompanying the recent rapid increase in a recording density and extremely severe environmental resistance accompanying diversification of the applications.The magnetic disk of the present invention is a magnetic disk having at least a magnetic layer, a carbon protective layer, and a lubrication layer sequentially provided on a substrate, and the lubrication layer is a film formed by a lubricant that contains two types of compounds having a perfluoropolyether main chain in the structure, a molecular weight distribution of the two types in total being within a range of 1 to 1.2, the two types of compounds including a compound a having a hydroxyl group at the end and a compound b having a number average molecular weight smaller than the number average molecular weight of the compound a and not more than 1500, and a content of the compound b in the two types of compounds being not more than 10%.

摘要翻译： 提供了一种磁盘，其具有优异的磁盘的耐久性，特别是LUL耐久性和CFT特性，并且伴随着近来记录密度的快速增加和极其恶劣的环境阻力，磁头浮动量减少，具有高可靠性 多样化的应用程序。 本发明的磁盘是至少具有磁性层，碳保护层和依次设置在基板上的润滑层的磁盘，润滑层是由含有两种类型的化合物的润滑剂形成的膜 在该结构中具有全氟聚醚主链，两种类型的分子量分布总计在1至1.2的范围内，两种类型的化合物包括末端具有羟基的化合物a和化合物b具有 数均分子量小于化合物a的数均分子量，不大于1500，两种化合物中化合物b的含量不超过10％。

公开(公告)号：US08062778B2

公开(公告)日：2011-11-22

申请号：US12088831

申请日：2006-09-28

申请人： Kota Suzuki ,  Koichi Shimokawa

发明人： Kota Suzuki ,  Koichi Shimokawa

IPC分类号： G11B5/65

CPC分类号： G11B5/8408 ,  C10M107/38 ,  C10N2230/00 ,  C10N2230/08 ,  C10N2240/204 ,  G11B5/725 ,  G11B5/82

摘要： In order to obtain a magnetic recording disk that exhibits high reliability even if the flying height of a magnetic head becomes very narrow, a lubricant is specified in terms of both molecular structure and quantitative data. That is, a lubricating layer 14 of the magnetic recording disk 1 is formed by a lubricant which contains perfluoropolyether compounds represented by the following chemical formula (Chemical Formula 1) and which has a first component content of 71.7%, a second component content of 15.7%, a third component content of 11.7%, a fourth component content of 0.3%, and a fifth component content of 0.6%: X—OCH2CF2—(CF2O)m(C2F4O)n—CF2OCH2O—X  (Chemical Formula 1) m, n=9 to 11 first component: X=X1=CH2CH(OH)CH2OH second component: X=X2=CH2CH(OH)CH2OCH2CH(OH)CH2OH third component: X=X3=H fourth component: X=X4=CF3 fifth component: X=X5=CF2Cl.

摘要翻译： 为了获得即使磁头的飞行高度变得非常窄的情况下仍具有高可靠性的磁记录盘，就分子结构和定量数据而言，都规定润滑剂。 也就是说，磁记录盘1的润滑层14由含有由以下化学式（化学式1）表示的全氟聚醚化合物的润滑剂形成，其第一成分含量为71.7％，第二成分含量为15.7 ％，第三成分含量为11.7％，第四成分含量为0.3％，第五成分含量为0.6％：X-OCH 2 CF 2 - （CF 2 O）m（C 2 F 4 O）n -CF 2 OCH 2 O-X（化学式1） n = 9〜11第一成分：X = X1 = CH2CH（OH）CH2OH第二成分：X = X2 = CH2CH（OH）CH2OCH2CH（OH）CH2OH第三成分：X = X3 = H第四成分：X = X4 = 组分：X = X5 = CF2Cl。

公开(公告)号：US20100304186A1

公开(公告)日：2010-12-02

申请号：US12744862

申请日：2009-03-27

申请人： Koichi Shimokawa

发明人： Koichi Shimokawa

IPC分类号： G11B5/725 ,  G11B5/84 ,  B05D5/08

CPC分类号： G11B5/725 ,  C10M107/38 ,  C10M2213/043 ,  C10N2240/204 ,  G11B5/8408

摘要： Provided is a magnetic disk comprising a lubricating layer formed of a lubricant. The lubricant constituting the lubricating layer has excellent properties, for example, excellent fluidity, surface energy, and CFT properties. By virtue of the excellent properties, the magnetic disk has a high level of reliability despite a low flying height of a magnetic head due to a recent rapid increase in recording density and a very severe environment resistance requirement due to diversification of applications. The magnetic disk comprises a substrate and at least a magnetic layer, a protective layer, and a lubricating layer provided in that order over the substrate. The lubricating layer is formed of a lubricant that is a mixture of a specific perfluoropolyether lubricant with a lubricant formed of a compound comprising perfluoropolyether groups having a perfluoropolyether main chain in the structure thereof and having a hydroxyl group at the end thereof, the perfluoropolyether groups being bonded to each other through a divalent linking group having at least two hydroxyl groups in the structure thereof.

摘要翻译： 提供一种磁盘，其包括由润滑剂形成的润滑层。 构成润滑层的润滑剂具有优异的性能，例如优异的流动性，表面能和CFT性质。 由于优异的性能，尽管磁头的飞行高度由于记录密度的快速增加和由于应用的多样化而导致的非常严格的环境阻力要求，磁盘具有高水平的可靠性。 该磁盘包括基片和至少一层磁性层，保护层和在基片上依次设置的润滑层。 润滑层由特定的全氟聚醚润滑剂与其结构中具有全氟聚醚主链的全氟聚醚基团的化合物形成的润滑剂的混合物形成，其末端具有羟基，全氟聚醚基团为 通过其结构中具有至少两个羟基的二价连接基彼此键合。

公开(公告)号：US20100028721A1

公开(公告)日：2010-02-04

申请号：US12443435

申请日：2007-09-28

申请人： Katsushi Hamakubo ,  Koichi Shimokawa ,  Kota Suzuki

发明人： Katsushi Hamakubo ,  Koichi Shimokawa ,  Kota Suzuki

IPC分类号： G11B5/71 ,  C07C43/12

CPC分类号： G11B5/725 ,  C10M107/38 ,  C10M171/00 ,  C10N2220/02 ,  C10N2220/021 ,  C10N2230/06 ,  C10N2240/204

摘要： A lubricant for magnetic disks which can form a lubricating layer having a reduced thickness while attaining a high coverage and is excellent in heat resistance and adhesion to a protective layer. The lubricant for magnetic disks comprises a perfluoropolyether compound in which the relationship between the number-average molecular weight and the standardized value of the number of hydroxy groups contained in the molecule satisfies the following: the number-average molecular weight is in the range of 1,000-6,000; the standardized value of the number of hydroxy groups contained in the molecule is 180 or higher; and the compound is in a region located below the line connecting the point where the number-average molecular weight is 1,000 and the standardized value of the number of hydroxy groups in the molecule is 400 to the point where the number-average molecular weight is 6,000 and the standardized value of the number of hydroxy groups in the molecule is 1,600. The compound has at least one hydroxy group around the center of the molecular chain.

摘要翻译： 一种用于磁盘的润滑剂，其可以在获得高覆盖率的同时形成具有减小的厚度的润滑层，并且具有优异的耐热性和对保护层的粘合性。 用于磁盘的润滑剂包括其中数均分子量和分子中包含的羟基数的标准值之间的关系满足以下的全氟聚醚化合物：数均分子量在1,000 -6,000; 分子中含有的羟基数的标准值为180以上; 该化合物位于连接数均分子量为1000的点的线下方，分子中羟基的标准化值为400，数均分子量为6,000 分子中羟基数的标准值为1,600。 该化合物在分子链中心周围具有至少一个羟基。

公开(公告)号：US20090023017A1

公开(公告)日：2009-01-22

申请号：US12161626

申请日：2007-01-22

申请人： Hiroshi Tomiyasu ,  Koichi Shimokawa

发明人： Hiroshi Tomiyasu ,  Koichi Shimokawa

IPC分类号： G11B5/65

CPC分类号： G11B5/725 ,  C10M147/00 ,  C10M153/04 ,  C10M2213/0606 ,  C10M2223/08 ,  C10N2240/204 ,  C10M2223/083

摘要： Disclosed is a magnetic disk which has a lubricant layer with excellent heat resistance and high adhesiveness and is free from fly-stiction failure or corrosion failure even at an extremely low flying height of 10 nm or lower. Also disclosed is a magnetic disk which has a lubricant layer with good thermal properties and can exert a stable action over a wide temperature range. The magnetic disk comprises a substrate (1), and a magnetic layer (3), a carbon-containing protective layer (4) and a lubricant layer (5) provided on the substrate (1), wherein the lubricant layer (5) contains a magnetic disk lubricant comprising a compound having a phosphazene ring and two or more hydroxyl and/or carboxyl groups in the molecule.

摘要翻译： 公开了一种具有优异的耐热性和高粘合性的润滑剂层的磁盘，即使在10nm以下的飞行高度极低的情况下，也不会发生飞虱故障或腐蚀破坏。 还公开了一种磁盘，其具有热性能良好的润滑剂层，并且可以在宽的温度范围内发挥稳定的作用。 磁盘包括基板（1）和设置在基板（1）上的磁性层（3），含碳保护层（4）和润滑层（5），其中润滑剂层（5）包含 包含在分子中具有磷腈环和两个或多个羟基和/或羧基的化合物的磁盘润滑剂。

公开(公告)号：US20120276417A1

公开(公告)日：2012-11-01

申请号：US13386343

申请日：2010-06-22

申请人： Koichi Shimokawa ,  Katsushi Hamakubo

发明人： Koichi Shimokawa ,  Katsushi Hamakubo

IPC分类号： C08G79/04 ,  C07F9/6593 ,  G11B5/725

CPC分类号： G11B5/725 ,  C10M105/74 ,  C10M107/38 ,  C10M107/48 ,  C10M2213/04 ,  C10M2213/043 ,  C10M2213/0606 ,  C10M2223/08 ,  C10M2223/083 ,  C10N2220/021 ,  C10N2230/06 ,  C10N2230/08 ,  C10N2240/204 ,  C10N2250/14

摘要： A lubricant for a magnetic disk that is excellent in heat resistance and is suitably used in a magnetic disk to be mounted on a magnetic recording device of a thermally assisted magnetic recording system and a magnetic disk provided with a lubricant layer containing this lubricant. The lubricant for a magnetic disk contains a compound where perfluoropolyether groups each having a perfluoropolyether main chain in its structure and a phosphazene ring at an end are linked to each other through a linking group. The linking group is an aliphatic group or a phosphazene ring. In a magnetic disk having at least a magnetic recording layer, a protective layer, and a lubricant layer on a substrate, the lubricant layer contains the lubricant for a magnetic disk.

摘要翻译： 一种用于磁盘的润滑剂，其耐热性优异，适用于安装在热辅助磁记录系统的磁记录装置上的磁盘和设置有含有该润滑剂的润滑剂层的磁盘。 用于磁盘的润滑剂含有其结构中各自具有全氟聚醚主链的全氟聚醚基团和末端的磷腈环通过连接基彼此连接的化合物。 连接基团是脂族基团或磷腈环。 在基板上至少具有磁记录层，保护层和润滑层的磁盘中，润滑剂层含有用于磁盘的润滑剂。