公开(公告)号：US4368237A

公开(公告)日：1983-01-11

申请号：US38620

申请日：1979-05-14

申请人： Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

发明人： Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

IPC分类号： C09D5/23 ,  G11B5/702 ,  G11B5/842 ,  H01F10/02

CPC分类号： G11B5/7022 ,  Y10S428/90 ,  Y10T428/31511 ,  Y10T428/31609 ,  Y10T428/31725 ,  Y10T428/31935

摘要： A magnetic recording material having superior abrasion resistance and thermal stability is produced by coating a magnetic coating composition consisting essentially of aqueous emulsions of at least two resin binders capable of reacting with each other upon mixing, and being present therein in the separated state, and a ferromagnetic powder on a non-magnetic support, drying the coating, and curing the resulting magnetic recording layer where drying is insufficient to effect curing. Hazards ascribable to the use of organic solvents in conventional techniques can be obviated by this invention.

摘要翻译： 具有优异的耐磨性和热稳定性的磁记录材料通过涂覆基本上由至少两种混合后能够彼此反应并且以分离状态存在的树脂粘合剂的水乳液组成的磁性涂料组合物， 铁磁粉末在非磁性载体上，干燥涂层，并固化所得到的磁记录层，其中干燥不足以实现固化。 本发明可以避免归因于常规技术中使用有机溶剂的危害。

公开(公告)号：US4068040A

公开(公告)日：1978-01-10

申请号：US588936

申请日：1975-06-20

申请人： Yasuyuki Yamada ,  Kazuhiko Morita ,  Goro Akashi

发明人： Yasuyuki Yamada ,  Kazuhiko Morita ,  Goro Akashi

IPC分类号： G11B5/702 ,  H01F10/02

CPC分类号： G11B5/7022 ,  Y10S428/90 ,  Y10T428/31576 ,  Y10T428/3158 ,  Y10T428/31609 ,  Y10T428/31855

摘要： Magnetic recording tapes having an excellent durability are obtained by using as a binder for ferromagnetic powders on a base film or sheet an intimate mixture of (1) a vinyl chloride-vinyl acetate copolymer, (2) an organic polyisocyanate and (3) a reactive acrylic resin having a carboxyl group content of from 1 to 30% by weight which will react through the carboxyl groups with the polyisocyanate compound into a crosslinked cured state.

摘要翻译： 通过在（1）氯乙烯 - 乙酸乙烯酯共聚物，（2）有机多异氰酸酯和（3）有机多异氰酸酯和（3）有机多异氰酸酯的紧密混合物的基础薄膜或片材上使用铁磁粉末的粘合剂，获得具有优异耐久性的磁记录带 羧基含量为1〜30重量％的丙烯酸树脂，其通过羧基与多异氰酸酯化合物反应成交联固化状态。

公开(公告)号：US4135032A

公开(公告)日：1979-01-16

申请号：US835376

申请日：1977-09-21

申请人： Goro Akashi ,  Masaaki Fujiyama ,  Yasuyuki Yamada

发明人： Goro Akashi ,  Masaaki Fujiyama ,  Yasuyuki Yamada

IPC分类号： G11B5/70 ,  G11B5/735 ,  G11B5/78

CPC分类号： G11B5/70 ,  G11B5/735 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/258 ,  Y10T428/265

摘要： A magnetic recording medium comprising a non-magnetizable plastic film support having a magnetic recording layer on one side thereof and, on the other side thereof, a layer containing (1) at least one powder of carbon black or graphite, and (2) at least one powder of a white pigment or a light colored pigment, and (3) a binder, powders (1) and (2) forming divided color areas in the back surface layer, and the back surface layer having a surface electrical resistance below 1 .times. 10.sup.10 ohm/cm.sup.2.

公开(公告)号：US4503119A

公开(公告)日：1985-03-05

申请号：US325939

申请日：1981-11-30

申请人： Ryuji Shirahata ,  Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

发明人： Ryuji Shirahata ,  Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

IPC分类号： G11B5/66 ,  G11B5/64 ,  G11B5/65 ,  G11B5/725 ,  H01F41/14 ,  H01F1/06 ,  H01F1/33

CPC分类号： H01F41/14 ,  G11B5/64 ,  G11B5/725 ,  Y10S428/90 ,  Y10T428/265 ,  Y10T428/273

摘要： A magnetic recording medium which is characterized by a lubricant present in channels diagonally extending through a magnetic metal thin film having a columnar structure formed by vapor deposition; this medium possesses improved running properties and abrasion resistance which last for an extended period of time.

摘要翻译： 一种磁记录介质，其特征在于存在于通过气相沉积形成的具有柱状结构的磁性金属薄膜的对角延伸的通道中的润滑剂; 该介质具有改善的运行性能和耐磨性，持续较长时间。

公开(公告)号：US4414271A

公开(公告)日：1983-11-08

申请号：US352220

申请日：1982-02-25

申请人： Tatsuji Kitamoto ,  Ryuji Shirahata ,  Yasuyuki Yamada ,  Goro Akashi

发明人： Tatsuji Kitamoto ,  Ryuji Shirahata ,  Yasuyuki Yamada ,  Goro Akashi

IPC分类号： G11B5/66 ,  G11B5/64 ,  G11B5/65 ,  G11B5/702 ,  G11B5/71 ,  G11B5/72 ,  G11B5/84 ,  G11B5/85 ,  G11B5/851 ,  B32B5/16

CPC分类号： G11B5/851 ,  G11B5/64 ,  G11B5/702 ,  G11B5/71 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/265

摘要： A magnetic recording medium comprising a substrate, a thin magnetic metal film having spaced-apart columnar grains deposited on the substrate, and a crosslinked organic polymer formed from a polymerizable organic compound and a curing agent in the spaces between the columnar grains and integrated therewith. The medium is prepared by impregnating the spaces between the columnar grains with a polymerizable organic compound and a curing agent and curing them in the spaces by the crosslinking reaction.

摘要翻译： 一种磁记录介质，包括基材，沉积在基材上的具有间隔开的柱状晶粒的薄磁性金属膜和由可聚合有机化合物形成的交联的有机聚合物和柱状颗粒之间的空间中的固化剂并与其结合。 通过将柱状颗粒之间的空间与可聚合有机化合物和固化剂浸渍并通过交联反应在空间中固化来制备介质。

公开(公告)号：US4273797A

公开(公告)日：1981-06-16

申请号：US30538

申请日：1979-04-16

申请人： Goro Akashi ,  Yasuyuki Yamada ,  Masaaki Fujiyama ,  Nobutaka Yamaguchi

发明人： Goro Akashi ,  Yasuyuki Yamada ,  Masaaki Fujiyama ,  Nobutaka Yamaguchi

IPC分类号： C09D177/00 ,  C09D127/06 ,  C09D163/00 ,  G11B5/708 ,  G11B5/73 ,  G11B5/735 ,  B05D5/12

CPC分类号： G11B5/708 ,  G11B5/735

摘要： A magnetic recording medium comprising a plastic film support having a magnetic recording layer on one side is provided with a backing layer containing: (1) a white and/or light colored powder; (2) carbon black and/or graphite; and (3) a polymeric binder. The backing layer transmits more than 3% of white light at a thickness of 2 microns and has a surface electrical resistance of less than 10.sup.10 .OMEGA./cm. Pinholes and drop-out are easily detected in forming such a magnetic recording medium.

摘要翻译： 包括在一侧具有磁记录层的塑料膜载体的磁记录介质设置有背衬层，其包含：（1）白色和/或浅色粉末; （2）炭黑和/或石墨; 和（3）聚合物粘合剂。 背衬层以2微米的厚度透过超过3％的白光，其表面电阻小于1010欧米加/厘米。 在形成这种磁记录介质时容易检测出针孔和脱落。

公开(公告)号：US4260466A

公开(公告)日：1981-04-07

申请号：US771583

申请日：1977-02-24

申请人： Ryuji Shirahata ,  Tatsuji Kitamoto ,  Yasuyuki Yamada ,  Goro Akashi

发明人： Ryuji Shirahata ,  Tatsuji Kitamoto ,  Yasuyuki Yamada ,  Goro Akashi

IPC分类号： G11B5/85 ,  C09D5/23 ,  C23C14/06 ,  C23C14/24 ,  C23C14/34 ,  G11B5/84 ,  G11B5/851 ,  H01F10/02

CPC分类号： G11B5/8416 ,  C23C14/06 ,  G11B5/851 ,  Y10S428/90 ,  Y10T428/31721

摘要： A method of producing a magnetic recording layer on a support comprising simultaneously depositing a ferromagnetic material and a polymer on a support using a vapor deposition technique such as vacuum deposition, sputtering, etc., thereby to produce thereon a magnetic recording layer of a composite film of the ferromagnetic material and the polymer. A further embodiment for producing a magnetic recording layer comprises simultaneously depositing a ferromagnetic material and a monomer or oligomer on the support using a vapor deposition technique, polymerizing the deposited layer, e.g., using a polymerization catalyst or by applying ionizing or electromagnetic rays thereto, to form a composite film of the ferromagnetic material and the polymer. The magnetic recording layer thus obtained in either embodiment can be used for high density recording.

摘要翻译： 一种在支撑体上制造磁记录层的方法，包括使用诸如真空沉积，溅射等的气相沉积技术在载体上同时沉积铁磁材料和聚合物，从而在其上制备复合膜的磁记录层 的铁磁材料和聚合物。 用于制造磁记录层的另一实施例包括使用气相沉积技术同时在支撑体上沉积铁磁材料和单体或低聚物，使沉积层聚合，例如使用聚合催化剂或通过向其施加电离或电磁辐射至 形成铁磁材料和聚合物的复合膜。 这样获得的磁记录层可用于高密度记录。

公开(公告)号：US4571364A

公开(公告)日：1986-02-18

申请号：US649326

申请日：1984-09-10

申请人： Akira Kasuga ,  Akihiro Matsufuji ,  Yasuyuki Yamada ,  Nobuo Tsuji

发明人： Akira Kasuga ,  Akihiro Matsufuji ,  Yasuyuki Yamada ,  Nobuo Tsuji

IPC分类号： C08G18/83 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  G11B5/714 ,  G11B5/73 ,  G11B5/70

CPC分类号： G11B5/714 ,  G11B5/7021 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/265 ,  Y10T428/31609 ,  Y10T428/31935

摘要： A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer comprising ferromagnetic particles dispersed in a binder, said ferromagnetic particles having a BET specific surface area of 25 m.sup.2 /g or more, said binder comprising a modified polyurethane resin containing 0.1 meq/g or more of functional groups selected from carboxyl groups, hydroxyl groups, sulfonic acid groups, and epoxy groups, and containing at least three functional groups per molecule of the resin.

摘要翻译： 描述了一种磁记录介质，包括其上设置有包含分散在粘合剂中的铁磁颗粒的磁性层的非磁性载体，所述铁磁性颗粒的BET比表面积为25m 2 / g以上，所述粘合剂包含改性聚氨酯 含有0.1meq / g以上选自羧基，羟基，磺酸基和环氧基的官能团的树脂，每分子含有至少三个官能团的树脂。

公开(公告)号：US4439486A

公开(公告)日：1984-03-27

申请号：US357448

申请日：1982-03-12

申请人： Yasuyuki Yamada ,  Masaaki Fujiyama ,  Nobuo Tsuji

发明人： Yasuyuki Yamada ,  Masaaki Fujiyama ,  Nobuo Tsuji

IPC分类号： C09D5/23 ,  G11B5/702 ,  G11B5/706 ,  G11B5/714 ,  G11B5/70

CPC分类号： G11B5/7022 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265 ,  Y10T428/31609 ,  Y10T428/31703

摘要： A magnetic recording medium having a magnetic layer formed on a nonmagnetic base is disclosed. The magnetic layer comprises ferromagnetic particles having a specific surface area of 30 m.sup.2 /g or more. The particles are dispersed in a binder which comprises a thermoplastic polyurethane resin or polyurethane prepolymer and nitrocellulose having an average degree of polymerization of about 50 to 300 and a degree of nitration of 10.7 to 13.0.

摘要翻译： 公开了一种具有形成在非磁性基底上的磁性层的磁记录介质。 磁性层包含比表面积为30m 2 / g以上的铁磁性粒子。 将颗粒分散在包含热塑性聚氨酯树脂或聚氨酯预聚物和平均聚合度为约50至300且硝化度为10.7至13.0的硝酸纤维素的粘合剂中。

公开(公告)号：US4837081A

公开(公告)日：1989-06-06

申请号：US39123

申请日：1987-04-16

申请人： Yasuyuki Yamada ,  Hajime Miyatsuka ,  Tsutomu Okita ,  Nobuo Tsuji

发明人： Yasuyuki Yamada ,  Hajime Miyatsuka ,  Tsutomu Okita ,  Nobuo Tsuji

IPC分类号： C08G18/44 ,  C08L75/04 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  C09D175/08 ,  G11B5/702 ,  G11B5/706 ,  G11B5/708

CPC分类号： G11B5/70636 ,  C08G18/44 ,  C08L75/04 ,  G11B5/7022 ,  Y10S428/90 ,  Y10T428/257 ,  Y10T428/31507 ,  Y10T428/31609

摘要： A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer containing CrO.sub.2 fine particles and a binder, wherein the binder comprises polycarbonate polyurethane in an amount of from about 30 to about 90 wt %, based on the total weight of said binder.

摘要翻译： 描述了一种磁记录介质，其包括在其上设置有含有CrO 2微粒和粘合剂的磁性层的非磁性载体，其中所述粘合剂包含约30至约90重量％的聚碳酸酯聚氨酯，基于总计 所述粘合剂的重量。