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1. 发明授权

US5075167A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5075167A
公开(公告)日：1991-12-24
申请号：US406664
申请日：1989-09-13
申请人： Koichi Yamauchi , Hiroo Inaba , Hiroshi Ogawa
发明人： Koichi Yamauchi , Hiroo Inaba , Hiroshi Ogawa
IPC分类号： G11B5/702 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/71 , G11B5/716
CPC分类号： G11B5/71 , G11B5/716 , Y10S428/90 , Y10T428/265
摘要： A magnetic recording medium exhibiting good still durability and good running properties is disclosed, which comprises a non-magnetic support having thereon a first magnetic layer and a second magnetic layer in sequence, the first and second magnetic layers containing ferromagnetic powder and a binder, wherein a fatty acid ester (A) having the following structure is contained in the first magnetic layer and a fatty acid ester (B) having the following structure is contained in the second magnetic layer: ##STR1##
摘要翻译：公开了一种表现出良好的耐久性和良好的运行性能的磁记录介质，其包括其上依次具有第一磁性层和第二磁性层的非磁性载体，所述第一和第二磁性层含有铁磁粉末和粘合剂，其中具有以下结构的脂肪酸酯（A）包含在第一磁性层中，并且具有以下结构的脂肪酸酯（B）包含在第二磁性层中：脂肪酸酯（A）脂肪酸酯（B）（B）

2. 发明授权

US5126202A Magnetic recording medium containing ferro magnetic powder, polar group containing resins in a specific ratio and carbon black of a specific size range 失效
标题翻译：含有铁磁粉末，特定比例的含极性基团的树脂和特定尺寸范围的炭黑的磁记录介质
公开(公告)号：US5126202A
公开(公告)日：1992-06-30
申请号：US190846
申请日：1988-05-06
申请人： Hiroo Inaba , Takeshi Kakuta , Koichi Yamauchi , Akihiro Matsufuji
发明人： Hiroo Inaba , Takeshi Kakuta , Koichi Yamauchi , Akihiro Matsufuji
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/708 , G11B5/714
CPC分类号： G11B5/7023 , G11B5/708 , G11B5/714 , Y10S428/90 , Y10T428/2982 , Y10T428/31609
摘要： A magnetic recording medium comprising a nonmagnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein said ferromagnetic powder has a specific surface area of 40 m.sup.2 /g or more as measured by the BET method; said magnetic layer further comprises carbon black having an average particle diameter of from about 20 to 120 m.mu.; and said binder comprises the combination of (1) a vinyl chloride resin containing a phosphate ester group represented by ##STR1## wherein M.sub.1 and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sym.R.sub.3, or N.sym.HR.sub.2 wherein R represents an alkyl group or a hydrogen atom, and (2) at least one resin other than said vinyl chloride resin containing at least one of --SO.sub.3 M, --OSO.sub.2 M, --COOM, and ##STR2## wherein M, M.sub.1, and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sup.4 .sym. R.sub.3, or N.sup..sym. HR.sub.2 wherein R represents an alkyl group or a hydrogen atom; provided that the weight ratio of said resin other than said vinyl chloride resin to said vinyl chloride resin is from about 0.4 to 2.5.
摘要翻译：一种包含非磁性载体的磁记录介质，其上设置有包含分散在粘合剂中的铁磁性粉末的磁性层，其中所述铁磁性粉末通过BET法测量的比表面积为40m 2 / g以上; 所述磁性层还包含平均粒径为约20至120μm的炭黑; 并且所述粘合剂包含（1）含有由下式表示的磷酸酯基的氯乙烯树脂的组合，其中M1和M2可以相同或不同，各自表示Na，K，Li，H，N（+ ）R3或N（+）HR2，其中R表示烷基或氢原子，和（2）至少一种除所述氯乙烯树脂以外的至少一种树脂，其含有-SO 3 M，-OSO 2 M，-COOM，其中M，M1和M2可以相同或不同，分别表示Na，K，Li，H，N4（+）R3或N（+）HR2，其中R表示烷基或氢原子 ; 所述氯乙烯树脂以外的所述树脂与所述氯乙烯树脂的重量比为约0.4〜2.5。

3. 发明授权

US5112680A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5112680A
公开(公告)日：1992-05-12
申请号：US185214
申请日：1988-04-25
申请人： Hiroo Inaba , Takeshi Kakuta , Koichi Yamauchi , Akihiro Matsufuji
发明人： Hiroo Inaba , Takeshi Kakuta , Koichi Yamauchi , Akihiro Matsufuji
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/708 , G11B5/714
CPC分类号： G11B5/7085 , G11B5/7023 , G11B5/714 , Y10S428/90 , Y10T428/257 , Y10T428/30
摘要： A magnetic recording medium comprising a nonmagnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein said ferromagnetic powder has a specific surface area of 40 m.sup.2 /g or more as measured by the BET method; said magnetic layer further comprises Al.sub.2 O.sub.3 particles having an average particle diameter of from about 0.1 to 0.5 .mu.m; and said binder comprises the combination of (1) a vinyl chloride resin containing a phosphate ester group represented by ##STR1## wherein M.sub.1 and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sym.R.sub.3, or N.sym.HR.sub.2 wherein R represents an alkyl group or a hydrogen atom, and (2) at least one resin other than said vinyl chloride resin containing at least one of --SO.sub.3 M, --OSO.sub.2 M, --COOM, and ##STR2## wherein M, M.sub.1, and M.sub.2, which may be the same or different, each represents Na, K, Li, H, N.sym.R.sub.3, or N.sym.HR.sub.2 wherein R represents an alkyl group or a hydrogen atom; provided that the weight ratio of said resin other than said vinyl chloride resin to said vinyl chloride resin is from about 0.4 to 2.5.
摘要翻译：一种包含非磁性载体的磁记录介质，其上设置有包含分散在粘合剂中的铁磁性粉末的磁性层，其中所述铁磁性粉末通过BET法测量的比表面积为40m 2 / g以上; 所述磁性层还包含平均粒径为约0.1至0.5μm的Al 2 O 3颗粒; 并且所述粘合剂包含（1）含有由下式表示的磷酸酯基的氯乙烯树脂的组合，其中M1和M2可以相同或不同，各自表示Na，K，Li，H，N（+ ）R3或N（+）HR2，其中R表示烷基或氢原子，和（2）至少一种除了含有-SO 3 M，-OSO 2 M，-COOM和其中M，M1和M2可以相同或不同，分别表示Na，K，Li，H，N（+）R3或N（+）HR2，其中R表示烷基或氢原子 ; 所述氯乙烯树脂以外的所述树脂与所述氯乙烯树脂的重量比为约0.4〜2.5。

4. 发明授权

US5178935A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5178935A
公开(公告)日：1993-01-12
申请号：US419238
申请日：1989-10-10
申请人： Shinji Saito , Hiroshi Ogawa , Naoyoshi Chino , Hiroo Inaba , Kazuaki Taga
发明人： Shinji Saito , Hiroshi Ogawa , Naoyoshi Chino , Hiroo Inaba , Kazuaki Taga
IPC分类号： G11B5/716
CPC分类号： G11B5/716 , Y10S428/90 , Y10T428/24942 , Y10T428/265 , Y10T428/31609
摘要： A magnetic recording comprising a non-magnetic support having thereon first and second magnetic layers containing a binder and a ferromagnetic powder. In a first embodiment, the content of the binder in each magnetic layer containing a vinyl chloride resin or a cellulose resin is characterized in relation to the quantity of the ferromagnetic powder contained therein. In a second embodiment, each of the magnetic layers is characterized in terms of a difference in glass transition point of a polyurethane resin contained therein. In a third embodiment, each of the magnetic layers is characterized in terms of thickness and polyisocyanate content, wherein the content of the polyisocyanate in the first magnetic layer is at least one part by weight larger than the amount of the polyisocyanate in the second magnetic layer.
摘要翻译：磁记录包括其上具有包含粘合剂和铁磁性粉末的第一和第二磁性层的非磁性载体。在第一实施方案中，含有氯乙烯树脂或纤维素树脂的每个磁性层中的粘合剂的含量的特征在于其中所含的铁磁性粉末的量。在第二实施方案中，每个磁性层的特征在于其中含有的聚氨酯树脂的玻璃化转变点的差异。在第三实施方案中，每个磁性层的特征在于厚度和多异氰酸酯含量，其中第一磁性层中多异氰酸酯的含量比第二磁性层中的多异氰酸酯的量大至少一个重量份。

5. 发明授权

US5085915A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5085915A
公开(公告)日：1992-02-04
申请号：US640512
申请日：1991-01-11
申请人： Kazuaki Taga , Takeshi Tsuda , Hiroo Inaba , Hiroshi Ogawa
发明人： Kazuaki Taga , Takeshi Tsuda , Hiroo Inaba , Hiroshi Ogawa
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/06 , G11B5/716 , G11B5/73 , G11B5/733
CPC分类号： G11B5/716 , G11B5/733 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/257 , Y10T428/259 , Y10T428/31786
摘要： A magnetic recording medium which comprises plurality of magnetic layers comprising at least first and second magnetic layers which are successively formed on a surface of a polyethylene terephthalate support, wherein said support contains inert inorganic particles having an average particle size of from 0.5 to 0.7 microns, a standard deviation of 0.1 microns or less and the surface of said support has a center line average roughness (Ra) of 16 nm or less and a density of protrusions (Ds) of 6000/mm.sup.2 or more in the case of protrusions of 0.7 microns of more.
摘要翻译：一种磁记录介质，其包括至少包含第一和第二磁性层的多个磁性层，所述磁性层依次形成在聚对苯二甲酸乙二醇酯载体的表面上，其中所述载体包含平均粒径为0.5至0.7微米的惰性无机颗粒， 0.1微米或更小的标准偏差，并且在0.7微米的突起的情况下，所述支撑体的表面的中心线平均粗糙度（Ra）为16nm以下，突起的密度（Ds）为6000 / mm2以上的更多。

6. 再颁专利

USRE36271E Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：USRE36271E
公开(公告)日：1999-08-17
申请号：US903353
申请日：1992-06-24
申请人： Hiroo Inaba , Shinji Saito , Hiroshi Ogawa
发明人： Hiroo Inaba , Shinji Saito , Hiroshi Ogawa
IPC分类号： G11B5/702 , C09D5/23 , G11B5/708 , G11B5/716 , G11B23/00
CPC分类号： G11B5/708 , G11B5/716 , Y10S428/90 , Y10T428/24967 , Y10T428/257 , Y10T428/265 , Y10T428/30
摘要： A magnetic recording medium comprises a non-magnetic support having provided thereon a lower magnetic layer having a thickness of 2.5 .mu.m or higher and an upper magnetic layer having a thickness of 2 .mu.m or lower in this order, wherein both the upper and lower magnetic layers contain ferromagnetic particles, and the lower magnetic layer contains carbon black having an average primary particle diameter of less than 20 .mu.m in the amount of from 1.0 to 20 parts by weight per 100 parts by weight of the ferromagnetic particles contained in the lower magnetic layer, and the upper magnetic layer contains carbon black having an average primary particle diameter of at least 40 .mu.m but less than 80 .mu.m in an amount of from 0.1 to 10.0 parts by weight per 100 parts by weight of the ferromagnetic particles contained in the upper magnetic layer, but less than the amount of carbon black used in the lower magnetic layer.
摘要翻译：磁记录介质包括具有厚度为2.5μm或更高的下磁性层和厚度为2μm或更小的上磁层的非磁性载体，其中上和下两个磁性层含有铁磁性粒子，下部磁性层含有平均一次粒径小于20μm的碳黑，相对于100重量份以下的铁磁性粒子为100重量份，1.0〜20重量份磁性层，上部磁性层含有平均一次粒径为40μm以上且小于80μm的碳黑，相对于100重量份含有的铁磁性粒子，为0.1〜10.0重量份在上磁性层中，但低于下磁性层中使用的炭黑的量。

7. 发明授权

US5098773A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5098773A
公开(公告)日：1992-03-24
申请号：US492164
申请日：1990-03-13
申请人： Shinji Saito , Hiroo Inaba , Hiroshi Ogawa , Hitoshi Noguchi
发明人： Shinji Saito , Hiroo Inaba , Hiroshi Ogawa , Hitoshi Noguchi
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/714 , G11B5/716
CPC分类号： G11B5/716 , G11B5/714 , Y10S428/90 , Y10T428/24942 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording medium having at least two magnetic layers is disclosed, comprising first and second mangetic layers which are successively formed in order on a nonmagnetic support, wherein a coercive force (Hc) of said second magnetic layer is 5.times.10.sup.4 to 1.5.times.10.sup.5 A/m, a ratio (Br/Hc) of a residual magnetic flux density (Br) of said second magnetic layer to the coercive force (Hc) is 2.0.times.10.sup.-6 H/m or more, SFD of said second magnetic layer is 0.6 or less, an average length in the long axis of magnetic particles in said second magnetic layer is 0.25 microns or less, a center line average surface roughness (Ra) of said second magnetic layer is 1/10 or less of the average length in the long axis of the magnetic particles, and a coercive force (Hc') of said first magnetic layer is 2.times.10.sup.4 to 1.times.10.sup.5 A/m.
摘要翻译：公开了具有至少两个磁性层的磁记录介质，包括在非磁性载体上依次形成的第一和第二凹凸层，其中所述第二磁性层的矫顽力（Hc）为5×10 4至1.5×10 5 A / m 所述第二磁性层的剩余磁通密度（Br）与所述矫顽力（Hc）的比（Br / Hc）为2.0×10 -6 H / m以上，所述第二磁性层的SFD为0.6以下所述第二磁性层中的磁性粒子长轴的平均长度为0.25微米以下，所述第二磁性层的中心线平均表面粗糙度（Ra）为长轴的平均长度的1/10以下的磁性颗粒，并且所述第一磁性层的矫顽力（Hc'）为2x104至1×105A / m。

8. 发明授权

US5089317A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5089317A
公开(公告)日：1992-02-18
申请号：US468327
申请日：1990-01-22
申请人： Hitoshi Noguchi , Shinji Saito , Hiroo Inaba , Hiroshi Ogawa
发明人： Hitoshi Noguchi , Shinji Saito , Hiroo Inaba , Hiroshi Ogawa
IPC分类号： G11B5/712 , G11B5/716
CPC分类号： G11B5/716 , Y10S428/90 , Y10T428/24942 , Y10T428/25 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording medium comprising two or more magnetic layers containing ferromagnetic substance dispersed in a binder provided on a non-magnetic substrate is disclosed, which is characterized in that a ferromagnetic substance whose water content is adjusted within the range of from 0.4 to 2.0 wt. % by moisture conditioning is used in the upper layer of the magnetic layers and a ferromagnetic substance having an water content less than by at least 0.1 wt. % than that of the feromagnetic substance used in the upper layer is used in the lower layer of the magnetic layers.
摘要翻译：公开了一种包含分散在设置在非磁性基板上的粘合剂中的含有铁磁性物质的两层以上的磁性层的磁记录介质，其特征在于，将含水量调节在0.4〜2.0重量％的范围内的铁磁性物质。通过湿度调节的％用于磁性层的上层和含水量低于0.1重量％的铁磁物质。比上层使用的铁磁性物质的摩尔数低于磁性层的下层。

9. 发明授权

US5080967A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5080967A
公开(公告)日：1992-01-14
申请号：US420422
申请日：1989-10-12
申请人： Hitoshi Noguchi , Shinji Saito , Hiroo Inaba , Hiroshi Ogawa
发明人： Hitoshi Noguchi , Shinji Saito , Hiroo Inaba , Hiroshi Ogawa
IPC分类号： C09D5/23 , C09D7/12 , G11B5/708 , G11B5/716
CPC分类号： G11B5/7085 , G11B5/716 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording medium comprising a non-magnetic support having provided thereon in this order, a first magnetic layer containing ferromagnetic particles dispersed in a binder and a second magnetic layer containing ferromagnetic particles dispersed in a binder, whereinsaid second magnetic layer contains particles of an abrasive material having a Mohs' hardness of 8 or more in an amount of 1 to 15 wt % based on the weight of the ferromagnetic particles contained in the second magnetic layer,said first magnetic contains particles of an abrasive material having a Mohs' hardness less than 8 in an amount of 5 to 50 wt % based on the weight of the ferromagnetic particles contained in the first magnetic layer, andthe proportion of the abrasive material to the ferromagnetic particles in said first magnetic layer is larger than that in said second magnetic layer.
摘要翻译：一种磁记录介质，其特征在于，具有依次设置在其上的非磁性载体，包含分散在粘合剂中的铁磁性粒子的第一磁性层和分散在粘合剂中的含有铁磁性粒子的第二磁性层，其中，所述第二磁性层含有摩尔氏硬度为8以上的摩擦硬度为1〜15重量％，含有第2磁性层的铁磁性粒子的重量，所述第1磁性体含有莫氏硬度较低的研磨材料粒子基于第一磁性层中所含的铁磁颗粒的重量为5〜50重量％，并且所述研磨材料与所述第一磁性层中的铁磁性粒子的比例大于所述第二磁性层层。

10. 发明授权

US5051320A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5051320A
公开(公告)日：1991-09-24
申请号：US309580
申请日：1989-02-13
申请人： Hiroo Inaba , Shinji Saito , Hiroshi Ogawa
发明人： Hiroo Inaba , Shinji Saito , Hiroshi Ogawa
IPC分类号： G11B5/702 , C09D5/23 , G11B5/708 , G11B5/716
CPC分类号： G11B5/708 , G11B5/716 , Y10S428/90 , Y10T428/24967 , Y10T428/257 , Y10T428/265 , Y10T428/30
摘要： A magnetic recording medium comprises a non-magnetic support having provided thereon a lower magnetic layer having a thickness of 2.5 .mu.m or higher and an upper magnetic layer having a thickness of 2 .mu.m or lower in this order, wherein both the upper and lower magnetic layers contain ferromagnetic particles, and the lower magnetic layer contains carbon black having an average primary particle diameter of less than 20 .mu.m in the amount of from 1.0 to 20 parts by weight per 100 parts by weight of the ferromagnetic particles contained in the lower magnetic layer, and the upper magnetic layer contains carbon black having an average primary particle diameter of at least 40 .mu.m but less than 80 .mu.m in an amount of from 0.1 to 10.0 parts by weight per 100 parts by weight of the ferromagnetic particles contained in the upper magnetic layer, but less than the amount of carbon black used in the lower magnetic layer.
摘要翻译：磁记录介质包括具有厚度为2.5μm或更高的下磁性层和厚度为2μm或更小的上磁层的非磁性载体，其中上和下两个磁性层含有铁磁性粒子，下部磁性层含有平均一次粒径小于20μm的碳黑，相对于100重量份以下的铁磁性粒子为100重量份，1.0〜20重量份磁性层，上部磁性层含有平均一次粒径为40μm以上且小于80μm的碳黑，相对于100重量份含有的铁磁性粒子，为0.1〜10.0重量份在上磁性层中，但低于下磁性层中使用的炭黑的量。

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