公开(公告)号：EP1635334A2

公开(公告)日：2006-03-15

申请号：EP05019428.1

申请日：2005-09-07

申请人： FUJI PHOTO FILM CO., LTD.

发明人： Hattori, Yasushi, c/o Fuji Photo Film Co., Ltd.

IPC分类号： G11B5/706 ,  G11B5/68 ,  G11B5/702 ,  H01F1/047 ,  H01F1/06

CPC分类号： G11B5/842 ,  B82Y25/00 ,  G11B5/70 ,  G11B5/702 ,  G11B5/716 ,  G11B5/72 ,  H01F1/065 ,  H01F10/007 ,  H01F10/123 ,  H01F10/265 ,  H01F41/16

摘要： A magnetic recording medium in which a magnetic layer is formed on a support, wherein the magnetic layer contains a CuAu-type consisting of FeNi, FePd, FePt, CoPt or CoAu or Cu 3 Au-type consising of Ni 3 Fe, FePd 3 , FePt 3 , CoPt 3 , Ni 3 Pt, CrPt 3 , Ni 3 Mn or Co 3 Pt ferromagnetic ordered alloy, and a value (Mr·t ave (G·µm)) obtained by multiplying the residual magnetic flux density (Mr (G)) with an average thickness (t ave (µm)) of the magnetic layer is 30 or more, and a method of manufacturing the magnetic recording medium, wherein a coating and drying treatment of coating a coating solution for forming a magnetic layer containing a CuAu-type or Cu 3 Au-type ferromagnetic ordered alloy and a binder on a support and of applying a drying treatment is conducted at least twice.

摘要翻译： 一种在支撑体上形成磁性层的磁记录介质，其中磁性层含有由FeNi，FePd，FePt，CoPt或CoAu组成的CuAu型或由Ni 3 Fe，FePd 3组成的Cu 3 Au型， FePt 3，CoPt 3，Ni 3 Pt，CrPt 3，Ni 3 Mn或Co 3 Pt铁磁有序合金，以及通过将剩余磁通密度（Mr（G（μm） ）和磁性层的平均厚度（t ave（μm））为30以上，以及制造磁记录介质的方法，其中涂覆用于形成含有 CuAu型或Cu 3 Au型铁磁有序合金和载体上的粘合剂和进行干燥处理进行至少两次。

公开(公告)号：EP1431964A1

公开(公告)日：2004-06-23

申请号：EP03026644.9

申请日：2003-11-19

申请人： SONY CORPORATION

发明人： Kato, Atsushi ,  Kagawa, Junji ,  Murakami, Hiroyuki ,  Koike, Fumiko

IPC分类号： G11B5/716 ,  G11B5/702

CPC分类号： G11B5/716

摘要： A magnetic recording medium includes a non-magnetic support, a first magnetic layer and a second magnetic layer on which magnetic paints made of different ferromagnetic materials are applied in order of the first mmagnetic layer and the second magnetic layer on the non-magnetic support. Both the first magnetic layer and the second magnetic layer include polyester polyol having an alicyclic framework and a polyurethane resin composed of diisocyanate.

摘要翻译： 一种磁记录介质包括非磁性支持体，第一磁性层和第二磁性层，在所述非磁性支持体上以第一磁性层和第二磁性层的顺序施加由不同铁磁材料制成的磁性涂料。 第一磁性层和第二磁性层都包含具有脂环骨架的聚酯多元醇和由二异氰酸酯组成的聚氨酯树脂。

公开(公告)号：EP1426927A1

公开(公告)日：2004-06-09

申请号：EP03027767.7

申请日：2003-12-03

申请人： Fuji Photo Film Co., Ltd.

发明人： Murayama, Yuichiro ,  Hashimoto, Hiroshi

IPC分类号： G11B5/702 ,  G11B5/738 ,  G11B5/716

CPC分类号： G11B5/738 ,  G11B5/7021 ,  G11B5/716

摘要： A magnetic recording medium is provided that has on a non-magnetic support, in order, a radiation-cured layer formed by curing a layer containing a radiation curing compound by exposure to radiation, a lower layer having a non-magnetic powder and/or a magnetic powder dispersed in a binder, and at least one magnetic layer having a ferromagnetic powder dispersed in a binder. The binder of at least the magnetic layer is a binder having a glass transition temperature of 100°C to 200°C, and the magnetic layer has on its surface a number of micro projections having a height of 10 to 20 nm measured by atomic force microscopy (AFM) of 5 to 1,000/100 µm 2 .

摘要翻译： 提供了一种磁记录介质，其在非磁性载体上依次具有通过暴露于辐射下固化含有辐射固化化合物的层而形成的辐射固化层，具有非磁性粉末的下层和/或 分散在粘合剂中的磁性粉末和至少一个具有分散在粘合剂中的铁磁性粉末的磁性层。 至少磁性层的粘合剂是玻璃化转变温度为100℃至200℃的粘合剂，并且磁性层在其表面上具有许多由原子力测量的高度为10至20nm的微突起 显微镜（AFM）为5至1,000 /100μm2。

公开(公告)号：EP1346349A1

公开(公告)日：2003-09-24

申请号：EP01989606.7

申请日：2001-12-19

申请人： EMTEC Magnetics GmbH

发明人： HEES, Ulrike ,  BOHRMANN, Hans-Guenter ,  RAETHER, Benedikt ,  KRESS, Ria ,  KOHL, Albert ,  SCHULZ, Lothar

IPC分类号： G11B5/702 ,  C08G18/08 ,  C08G18/76 ,  C08G18/40 ,  C08G18/62

CPC分类号： G11B5/7022 ,  C08G18/0828 ,  C08G18/4063 ,  C08G18/6287

摘要： The invention relates to a polyurethane comprising at least one anionic active group L. The anionic active group L is bound to a segment G in the polyurethane, said segment containing monomers that have been linked by radical polymerisation. The invention also relates to a binding agent composition containing an inventive polyurethane, to a method for the production thereof and to the use of polyurethanes of this type for producing magnetic recording media.

公开(公告)号：EP1294797A1

公开(公告)日：2003-03-26

申请号：EP01951586.5

申请日：2001-06-13

申请人： EMTEC Magnetics GmbH (HRB 3925)

发明人： RAETHER, Benedikt ,  HEES, Ulrike

IPC分类号： C08K3/22 ,  G11B5/702 ,  C08F293/00

CPC分类号： G11B5/7023 ,  C08F293/005 ,  C08K3/08 ,  C08K3/10 ,  C08L53/00 ,  C08L55/02 ,  C09D153/00 ,  C09D155/02 ,  C08L2666/14 ,  C08L2666/02

摘要： The invention relates to a bonding agent composition containing at least one block copolymer which can be produced by means of radical polymerisation, at least two blocks of different monomer compositions, and at least one magnetic or magnetisable pigment. The invention also relates to a method for producing such a bonding agent composition and the use thereof.

公开(公告)号：EP0798699B1

公开(公告)日：2002-01-09

申请号：EP97105182.6

申请日：1997-03-27

申请人： TDK Corporation

发明人： Nishizawa, Akinori ,  Tanaka, Kazushi ,  Sakaguchi, Shuji

IPC分类号： G11B5/702

CPC分类号： G11B5/7022 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/31609

公开(公告)号：EP0869981B1

公开(公告)日：2001-10-04

申请号：EP96939720.7

申请日：1996-11-11

申请人： MINNESOTA MINING AND MANUFACTURING COMPANY

发明人： CARLSON, James, G. ,  ROTTO, Nelson, T. ,  ANDERSON, Jeffrey, T. ,  SPAWN, Carol-Lynn ,  BLAGEV, Albena, V.

IPC分类号： C08G18/08 ,  G11B5/702

CPC分类号： C08G18/348 ,  C08G18/0814 ,  C08G18/0823 ,  C08G18/0833 ,  C08G18/284 ,  C08G18/2875 ,  C08G18/4277 ,  C08G18/44 ,  C08G18/62 ,  C08G18/6212 ,  C08G18/6229 ,  C08G18/6245 ,  C08G18/6283 ,  C08G18/6541 ,  C08G18/6659 ,  G11B5/7022 ,  G11B5/7027 ,  G11B5/735 ,  Y10T428/24207 ,  Y10T428/31551 ,  Y10T428/31609 ,  Y10T428/31855 ,  Y10T428/31928

公开(公告)号：EP1132897A1

公开(公告)日：2001-09-12

申请号：EP01105331.1

申请日：2001-03-07

申请人： FUJI PHOTO FILM CO., LTD.

发明人： Naoe, Koji, Fuji Photo Film Co., Ltd. ,  Ejiri, Kiyomi, Fuji Photo Film Co., Ltd.

IPC分类号： G11B5/706 ,  G11B5/714 ,  G11B5/738 ,  G11B5/702 ,  G11B5/70

CPC分类号： G11B5/738 ,  G11B5/70 ,  G11B5/7021 ,  G11B5/70621 ,  G11B5/714 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/24942 ,  Y10T428/24975 ,  Y10T428/265 ,  Y10T428/31609

摘要： The present invention aims to provide a magnetic recording medium for digital recording/reproducing systems having a small bit area, i.e. a short recording wavelength and a narrow track width, which is a particulate magnetic recording medium showing good electromagnetic characteristics.
A magnetic recording medium comprising a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder provided in this order on a nonmagnetic substrate wherein said magnetic layer has an average thickness of 0.01-0.1 µm and the ratio of the area of magnetic recording defects generated upon magnetic development after recording at the shortest recording wavelength to the total magnetic recording area is 0.2-20 %.

摘要翻译： 本发明的目的是提供一种用于具有小比特区域，即短记录波长和窄轨道宽度的数字记录/再现系统的磁记录介质，它是一种表现出良好电磁特性的微粒磁记录介质。 一种磁记录介质，其特征在于，在非磁性基板上依次具有含有非磁性体粉末和粘合剂的非磁性体层和含有铁磁性粉末和粘合剂的磁性层，所述磁性层的平均厚度为0.01〜0.1μm， 在以最短记录波长记录到总磁记录区域之后在磁显影时产生的磁记录缺陷的面积为0.2-20％。

公开(公告)号：EP1035145A2

公开(公告)日：2000-09-13

申请号：EP00104828.9

申请日：2000-03-07

申请人： Toyo Boseki Kabushiki Kaisha

发明人： Kizumoto, Hirotoshi, c/o Toyo Boseki K.K. ,  Yatsuka, Takeshi, c/o Toyo Boseki K.K. ,  Sugitawa, Chikara, c/o Toyo Boseki K.K. ,  Doi, Kuniyuki, c/o Toyo Boseki Kabushiki Kaisha

IPC分类号： C08G18/42 ,  G11B5/702

CPC分类号： G11B5/7021 ,  C08G18/4202 ,  C08G18/4211 ,  C08G18/4238 ,  C09D175/06

摘要： A magnetic recording medium possessing a magnetic layer formed by application onto a non-magnetic support, of a magnetic coating containing magnetic particles dispersed in a binder which contains a polyurethane resin, together with carbon black particles at 5% by weight or more, based on the weight of the magnetic particles. The polyurethane resin to be used herein is composed of: (a) a polyester polyol having a molecular weight of 2000 or lower and containing at least one selected from aromatic dibasic acids and alicyclic dibasic acids at a ratio of 90 mol% or more of acid components; (b) a high molecular weight polyol having a molecular weight of 5000 or lower, which is at least one selected from (b1) polyester polyols each containing an aliphatic dibasic acid at a ratio of 90 mol% or more of acid components, (b2) polylactones, (b3) polyester polyols, and (b4) polycarbonate polyols; (c) an organic diisocyanate compound; and (d) an optional compound having a molecular weight of 500 or lower and containing at least two functional groups in one molecule, which are reactive with isocyanate groups.

摘要翻译： 一种磁记录介质，该磁记录介质具有通过涂布在非磁性载体上而形成的磁性层，所述磁性涂层包含分散在含有聚氨酯树脂的粘合剂中的磁性颗粒的磁性涂层，以及以重量计5％或更多的炭黑颗粒 磁性颗粒的重量。 在此使用的聚氨酯树脂由（a）分子量为2000以下且含有选自芳香族二元酸和脂环族二元酸中的至少一种的比例为90摩尔％以上的酸的聚酯多元醇 组件; （b）分子量5000以下的高分子量多元醇，其是选自（b1）各自含有90mol％或更多酸组分的脂族二元酸的聚酯多元醇，（b2） ）聚内酯，（b3）聚酯多元醇，和（b4）聚碳酸酯多元醇; （c）有机二异氰酸酯化合物; 和（d）分子量为500或更低并且在一个分子中含有至少两个与异氰酸酯基团反应的官能团的任选化合物。

公开(公告)号：EP1022726A1

公开(公告)日：2000-07-26

申请号：EP99929870.6

申请日：1999-07-16

申请人： FUJI PHOTO FILM CO., LTD.

发明人： HASHIMOTO, Hiroshi, Fuji Photo Film Co., Ltd. ,  MURAYAMA, Yuichiro, Fuji Photo Film Co., Ltd. ,  MEGURO, Katsuhiko, Fuji Photo Film Co., Ltd.

IPC分类号： G11B5/702 ,  C09D175/04

CPC分类号： G11B5/716 ,  C08G18/0828 ,  C08G18/3206 ,  C08G18/3212 ,  C08G18/3234 ,  C08G18/4233 ,  C08G18/4238 ,  G11B5/7021 ,  Y10S428/90 ,  Y10T428/31609

摘要： The magnetic recording medium of the invention comprises a substrate and a magnetic layer stacked thereon and composed of a dispersion of a ferromagnetic powder in a binder, and is characterized in that the binder contains a polyurethane resin 1 obtained by polymerization of a dial compound having a cyclic structure and a long-chain form of alkyl chain with a diisocyanate compound. Preferably, the polyurethane resin contains as dial components a dimer dial and an aliphatic dial having a medium-chain form of alkyl branched chain. The polyurethane resin may comprise a polyether polyol having a cyclic structure. A dibasic acid in the polyester polyol may contain an aliphatic dibasic acid, the dial component may contain an aliphatic diol that does not include a cyclic structure having an alkyl branched chain, and an chain extender may include a polyester polyol comprising an aliphatic diol having an alkyl branched chain.

摘要翻译： 本发明的磁记录介质包括基材和层叠在其上并由铁磁粉末在粘合剂中的分散体构成的磁性层，并且其特征在于粘合剂包含聚氨酯树脂1，所述聚氨酯树脂1通过聚合具有 环状结构和长链形式的烷基链与二异氰酸酯化合物。 优选地，聚氨酯树脂含有二聚体表面和具有中链支链烷基的脂肪族表面作为表面组分。 聚氨酯树脂可以包含具有环状结构的聚醚多元醇。 聚酯多元醇中的二元酸可以含有脂肪族二元酸，表面组分可以含有不包含具有烷基支链的环状结构的脂肪族二醇，扩链剂可以包括含有脂肪族二醇的聚酯多元醇， 烷基支链。