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21. 发明授权

US4619856A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4619856A
公开(公告)日：1986-10-28
申请号：US737968
申请日：1985-05-28
申请人： Koh Kamada , Hiroshi Hashimoto , Tsutomu Okita , Noburo Hibino
发明人： Koh Kamada , Hiroshi Hashimoto , Tsutomu Okita , Noburo Hibino
IPC分类号： G11B5/73 , G11B5/70
CPC分类号： G11B5/7305 , Y10S428/90 , Y10T428/24372 , Y10T428/24413 , Y10T428/25 , Y10T428/31935
摘要： A magnetic recording medium is described, comprising a nonmagnetic support, a magnetic layer, and a nonmagnetic intermediate layer provided between the support and the magnetic layer, the nonmagnetic intermediate layer containing a radiation-polymerizable compound and finely divided particles, the nonmagnetic intermediate layer being polymerized by irradiation and having a surface roughness from about 0.001 to 0.02 .mu.m. This medium provides reduced gap loss between the medium and a magnetic head, and is suitable for use in high density recording.
摘要翻译：描述了一种磁记录介质，其包括设置在载体和磁性层之间的非磁性载体，磁性层和非磁性中间层，非磁性中间层含有可辐射聚合化合物和细碎颗粒，非磁性中间层为通过照射聚合并具有约0.001至0.02μm的表面粗糙度。该介质在介质和磁头之间提供减小的间隙损失，并且适用于高密度记录。

22. 发明授权

US4560616A Magnetic recording medium having binder cured by electron beam radiation 失效
标题翻译：具有通过电子束辐射固化的粘合剂的磁记录介质
公开(公告)号：US4560616A
公开(公告)日：1985-12-24
申请号：US521797
申请日：1983-08-09
申请人： Tsutomu Okita , Kyoichi Naruo , Hiroshi Hashimoto
发明人： Tsutomu Okita , Kyoichi Naruo , Hiroshi Hashimoto
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/70
CPC分类号： G11B5/702 , Y10S428/90 , Y10T428/31551 , Y10T428/31935
摘要： A magnetic recording medium comprising a support having coated thereon a magnetic layer is disclosed. The magnetic layer is comprised of a binder composition having ferromagnetic particles dispersed therein. The binder composition is cured by an electron beam and comprises a copolymer, a urethane resin and a compound having two or more acryloyl groups or methacryloyl groups. The copolymer may be a vinyl chloride-vinyl acetate-vinyl alcohol copolymer having a vinyl alcohol content of 1 to 15 wt % or a vinyl chloride-vinyl acetate-maleic acid copolymer having a maleic acid content of 1 to 10 wt %. The recording medium has excellent electromagnetic properties and the magnetic layer has excellent dynamic properties.
摘要翻译：公开了一种包括其上涂覆有磁性层的载体的磁记录介质。磁性层由其中分散有铁磁颗粒的粘合剂组合物组成。粘合剂组合物通过电子束固化，并包含共聚物，聚氨酯树脂和具有两个或更多个丙烯酰基或甲基丙烯酰基的化合物。共聚物可以是乙烯醇含量为1〜15重量％的氯乙烯 - 乙酸乙烯酯 - 乙烯醇共聚物或马来酸含量为1〜10重量％的氯乙烯 - 乙酸乙烯酯 - 马来酸共聚物。记录介质具有优良的电磁特性，磁性层具有优异的动态特性。

23. 发明授权

US4481231A Method for production of magnetic recording media 失效
标题翻译：磁记录介质的制造方法
公开(公告)号：US4481231A
公开(公告)日：1984-11-06
申请号：US559534
申请日：1983-12-08
申请人： Hiroshi Hashimoto , Tsutomu Okita , Noburo Hibino
发明人： Hiroshi Hashimoto , Tsutomu Okita , Noburo Hibino
IPC分类号： G11B5/70 , C09D5/23 , C09D175/00 , C09D175/06 , G11B5/702 , G11B5/73 , G11B5/842 , H01F10/02
CPC分类号： G11B5/7023 , G11B5/7026
摘要： A method for the production of a magnetic recording medium is disclosed. The method involves coating a support base with a magnetic coating composition. The support base has a percent thermal shrinkage in the direction corresponding to the longitudinal direction of the support base of not more than 0.15%. The magnetic coating composition contains a compound having not less than two acrylate groups or methacrylate groups in the molecule and includes ferromagnetic fine powder dispersed therein. After coating the magnetic coating composition on the support base it is irradiated with an electron beam. The resulting medium has excellent electromagnetic properties, durability and improved tape skew characteristics. Further, the composition has good storage stability.
摘要翻译：公开了一种制造磁记录介质的方法。该方法包括用磁性涂料组合物涂覆支撑基底。支撑基部在与支撑基部的纵向方向对应的方向上的热收缩百分比不大于0.15％。磁性涂料组合物含有分子中具有不少于2个丙烯酸酯基或甲基丙烯酸酯基的化合物，其中分散有铁磁细粉。将磁性涂料组合物涂布在支撑体上后，用电子束照射。所得到的介质具有优异的电磁特性，耐久性和改进的带偏斜特性。此外，组合物具有良好的储存稳定性。

24. 发明授权

US06376083B1 Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US06376083B1
公开(公告)日：2002-04-23
申请号：US08532976
申请日：1995-09-22
申请人： Yuichiro Murayama , Masaki Satake , Hiroshi Hashimoto , Tsutomu Okita
发明人： Yuichiro Murayama , Masaki Satake , Hiroshi Hashimoto , Tsutomu Okita
IPC分类号： G11B5702
CPC分类号： G11B5/7021 , Y10S428/90 , Y10T428/31609
摘要： The present invention provides a magnetic recording medium having high dispersion property, good running durability and good preservation property, and it comprises at least one magnetic layer having ferromagnetic powder dispersed by a binder placed on a non-magnetic support member, whereby a polyurethane resin or a polyurethane urea resin consisting of 5 mol % or less of a long chain diol having weight average molecular weight of 800 to 5,000, a short chain diol having weight average molecular weight of 50 to 500 and/or a short chain diamine and an organic diisocyanate is contained as the binder, said long chain diol has one polar group selected from —COOM, —SO3M, —OSO3M, —OPO(OM)2, or —PO(OM)2 (where M represents a hydrogen atom, an alkali metal ion, or an ammonium ion) in the molecule, and the polar group is contained in the polyurethane by 1 to 5 mol %.
摘要翻译：本发明提供了具有高分散性，良好的运行耐久性和良好保存性的磁记录介质，并且它包括至少一个磁性层，该磁性层具有通过放置在非磁性支撑构件上的粘合剂分散的铁磁性粉末，由此聚氨酯树脂或由5重量％以下的重均分子量为800〜5000的长链二醇，重均分子量为50〜500的短链二醇和/或短链二胺和有机二异氰酸酯组成的聚氨酯脲树脂所述长链二醇具有一个选自-COOM，-SO3M，-OSO3M，-OPO（OM）2或-PO（OM）2的极性基团（其中M表示氢原子，碱金属离子或铵离子），聚氨酯中的极性基团含有1〜5摩尔％。

25. 发明授权

US5612134A Magnetic recording medium having a carbon protective layer and a fluoro-lubricant supplied from a backcoat layer 失效
标题翻译：具有碳保护层和从后涂层供应的氟润滑剂的磁记录介质
公开(公告)号：US5612134A
公开(公告)日：1997-03-18
申请号：US687796
申请日：1996-07-19
申请人： Tsutomu Okita , Hideomi Watanabe , Toshio Ishida , Masaki Satake , Hiroshi Hashimoto
发明人： Tsutomu Okita , Hideomi Watanabe , Toshio Ishida , Masaki Satake , Hiroshi Hashimoto
IPC分类号： C10M169/04 , C10M101/00 , C10M105/52 , C10M131/12 , C10M135/10 , C10M137/02 , C10M137/04 , C10N30/06 , C10N40/18 , G11B5/66 , G11B5/71 , G11B5/72 , G11B5/725 , G11B5/735 , G11B5/84
CPC分类号： G11B5/72 , G11B5/725 , G11B5/735 , G11B5/8408 , Y10S428/90 , Y10T428/265 , Y10T428/30 , Y10T428/3154 , Y10T428/31544 , Y10T428/31678
摘要： A magnetic recording medium having a ferromagnetic metal thin film on at least one surface of a non-magnetic support. The magnetic recording medium has a surface layer containing at least either one of fluorine compounds represented by the following formulae (1) and (2):Rf-R.sub.1 Formula (1)Rf-R.sub.2 -Rf Formula (2)whereRf: (CF.sub.3).sub.a CF.sub.3-a (CF.sub.2).sub.ba: 1 to 3a+b: 1 to 11R.sub.1 : an alkyl or alkenyl group having from 8 to 26 carbon atomsR.sub.2 : an alkylene or alkenylene group having from 2 to 14 carbon atoms.The surface layer may be formed on a carbon film provided on the ferromagnetic metal thin film. The surface layer may further contain a fluorine compound having at least one polar group and a perfluoroalkyl group, and a rust inhibitor. These components may be contained in or coated on a back coat layer. The magnetic recording medium is excellent in running properties, durability and shelf stability.
摘要翻译：一种在非磁性载体的至少一个表面上具有强磁性金属薄膜的磁记录介质。磁记录介质具有含有下述式（1）和（2）表示的氟化合物中的至少一种的表面层：Rf-R1式（1）Rf-R2-Rf式（2）其中Rf：（CF3 ）aCF3-a（CF2）ba：1至3a + b：1至11 R1：具有8至26个碳原子的烷基或烯基R2：具有2至14个碳原子的亚烷基或亚烯基。表面层可以形成在设置在强磁性金属薄膜上的碳膜上。表面层还可以含有具有至少一个极性基团和全氟烷基的氟化合物和防锈剂。这些组分可以包含在或涂覆在背涂层上。磁记录介质的运行性能，耐久性和货架稳定性优异。

26. 发明授权

US5484661A Magnetic recording medium having a polyvinyl alkyl binder resin 失效
标题翻译：具有聚乙烯基烷基粘合剂树脂的磁记录介质
公开(公告)号：US5484661A
公开(公告)日：1996-01-16
申请号：US179942
申请日：1994-01-11
申请人： Hiroshi Hashimoto , Masaki Satake , Yuichiro Murayama , Tsutomu Okita
发明人： Hiroshi Hashimoto , Masaki Satake , Yuichiro Murayama , Tsutomu Okita
IPC分类号： C08F8/34 , C09D5/23 , C09D129/14 , G11B5/702 , G11B5/716 , G11B5/735 , G11B5/738 , G11B5/00
CPC分类号： G11B5/7023 , G11B5/735 , G11B5/738 , Y10S428/90 , Y10T428/31935
摘要： A binder for a magnetic recording medium which contains a polyvinyl alkylal resin modified by a sultone to introduce thereinto an atom group containing a polar group. Also disclosed is a magnetic recording medium that uses the above-described binder in a magnetic layer, a non-magnetic layer, a protective layer, an undercoat layer, etc. The binder and the magnetic recording medium are superior in dispersibility and exhibit high magnetic coating strength.
摘要翻译：一种用于磁记录介质的粘合剂，其包含由磺内酯改性的聚乙烯基烷基树脂以引入含有极性基团的原子团。还公开了在磁性层，非磁性层，保护层，底涂层等中使用上述粘合剂的磁记录介质。粘合剂和磁记录介质具有优异的分散性并表现出高磁性涂层强度。

27. 发明授权

US5049448A Magnetic recording medium containing an ester lubricant branched from the number 2 carbon position of the acid residue 失效
标题翻译：含有从酸残基的2碳位分支的酯润滑剂的磁记录介质
公开(公告)号：US5049448A
公开(公告)日：1991-09-17
申请号：US383514
申请日：1989-07-24
申请人： Takao Ohya , Yasuo Nishikawa , Jun Nakagawa , Fusao Yamanaka , Toshio Kawamata , Tsutomu Okita , Hiroshi Hashimoto , Mikihiko Kato
发明人： Takao Ohya , Yasuo Nishikawa , Jun Nakagawa , Fusao Yamanaka , Toshio Kawamata , Tsutomu Okita , Hiroshi Hashimoto , Mikihiko Kato
IPC分类号： C09D5/23 , G11B5/71 , G11B5/725
CPC分类号： G11B5/725 , G11B5/71 , Y10S428/90 , Y10T428/31 , Y10T428/31605 , Y10T428/31609
摘要： A magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon a magnetic layer, wherein at least one of ester compounds represented by formula (I) is present in or on the magnetic layer, ##STR1## wherein R.sub.1 represents a straight chain, saturated alkyl group having 6 to 12 carbon atoms, R.sub.2 represents a straight chain, saturated alkyl group having 4 to 10 carbon atoms, and R represents a branched or straight chain alkyl group having 4 to 22 carbon atoms.
摘要翻译：公开了一种磁记录介质，其包括其上具有磁性层的非磁性载体，其中至少一种由式（I）表示的酯化合物存在于磁性层中或其上，其中R1表示直链具有6〜12个碳原子的链状饱和烷基，R2表示直链，碳原子数4〜10的饱和烷基，R表示碳原子数为4〜22的支链或直链烷基。

28. 发明授权

US4632878A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4632878A
公开(公告)日：1986-12-30
申请号：US768007
申请日：1985-08-21
申请人： Tsutomu Okita , Hiroshi Hashimoto , Akiyoshi Hashimoto , Teruo Nakagawa , Hiroyuki Kato
发明人： Tsutomu Okita , Hiroshi Hashimoto , Akiyoshi Hashimoto , Teruo Nakagawa , Hiroyuki Kato
IPC分类号： C08G18/67 , C09D5/23 , C09D175/04 , C09D175/06 , G11B5/702 , G11B5/70
CPC分类号： G11B5/7021 , C08G18/671 , C08G18/673 , C08G18/678 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： The present invention relates to a magnetic recording medium prepared by the process comprising (1) coating a magnetic coating composition mainly containing ferromagnetic particles and a binder on a support and (2) irradiating the resulting support with electron beams, wherein the binder contains a compound represented by the following formula, ##STR1## wherein A represents a radical of a hydroxy compound containing at least one isocyanurate ring and at least one (meth)acryloyl group; DI represents a radical of an organic diisocyanate compound; B represents a radical of a polyol having at least two hydroxy groups; C represents a radical of a polybasic acid having at least two carboxy groups; m is a number of 1 to 7; and N is a positive number of 7 or less.
摘要翻译：本发明涉及一种通过以下方法制备的磁记录介质：（1）在载体上涂覆主要包含铁磁颗粒和粘合剂的磁性涂料组合物，和（2）用电子束照射所得载体，其中粘合剂含有化合物由下式表示：A-DI - [（BC）m-B-DI] N-A其中A表示含有至少一个异氰脲酸酯环和至少一个（甲基）丙烯酰基的羟基化合物的基团 ; DI表示有机二异氰酸酯化合物的基团; B表示具有至少两个羟基的多元醇基团; C表示具有至少两个羧基的多元酸的基团; m是1到7的数; N为7以下的正数。

29. 发明授权

US4619855A Magnetic recording medium with electron beam cured magnetic layer 失效
标题翻译：具有电子束固化磁性层的磁记录介质
公开(公告)号：US4619855A
公开(公告)日：1986-10-28
申请号：US542931
申请日：1983-10-18
申请人： Tsutomu Okita , Nobutaka Yamaguchi , Hiroshi Hashimoto
发明人： Tsutomu Okita , Nobutaka Yamaguchi , Hiroshi Hashimoto
IPC分类号： C09D5/23 , C09D101/18 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/73 , G11B5/84 , G11B5/70
CPC分类号： G11B5/7026 , G11B5/7022 , G11B5/84 , Y10S428/90 , Y10T428/24372 , Y10T428/24413 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium is disclosed. The medium is comprised of a support base having an average center line roughness (Ra) of 0.035 .mu.m or less which has coated thereon a magnetic layer. The magnetic layer is comprised of ferromagnetic fine particles dispersed in a binder comprising (1) a polymer selected from the group consisting of nitrocellulose resins, vinyl chloride-vinyl acetate resins and vinyl chloride-vinyl propionate type resins; (2) a urethane resin; and (3) a compound having 2 or more acrylate groups or methacrylate groups in the molecule thereof. The magnetic layer is cured by radiation with electron beams and has excellent electromagnetic properties as well as high durability. The magnetic medium provides less abrasiveness and the magnetic coating composition is stable and homogeneous during storage.
摘要翻译：公开了一种磁记录介质。该介质由平均中心线粗糙度（Ra）为0.035μm或更小的支撑基底组成，其上涂覆有磁性层。磁性层由分散在粘合剂中的铁磁细颗粒组成，包括（1）选自硝基纤维素树脂，氯乙烯 - 乙酸乙烯酯树脂和氯乙烯 - 丙酸乙烯酯类树脂的聚合物; （2）聚氨酯树脂; 和（3）在其分子中具有2个以上丙烯酸酯基或甲基丙烯酸酯基的化合物。磁性层通过电子束辐射固化，具有优异的电磁特性以及高耐久性。磁性介质提供较少的磨损性，并且磁性涂料组合物在储存期间是稳定和均匀的。

30. 发明授权

US4548833A Method for preparing a magnetic recording medium 失效
标题翻译：磁记录介质的制备方法
公开(公告)号：US4548833A
公开(公告)日：1985-10-22
申请号：US461702
申请日：1983-01-28
申请人： Hiroshi Hashimoto , Tsutomu Okita
发明人： Hiroshi Hashimoto , Tsutomu Okita
IPC分类号： G11B5/70 , C09D5/23 , C09D175/00 , C09D175/14 , G11B5/73 , G11B5/842 , G11B5/845 , B05D3/06
CPC分类号： G11B5/845 , Y10S428/90
摘要： A method for preparing a magnetic recording medium is disclosed. The method includes providing a support base and a particular coating composition for the base. The composition is comprised of a ferromagnetic powder, a binder containing a compound capable of being polymerized with electron beam irradiation, and a solvent. The composition has apparent viscosity of about 1 to 150 centipoise at a shearing speed of 4000 sec.sup.-1. After coating the composition on the support base, the coated layer is subjected to magnetic orientation. During orientation or shortly thereafter the coated layer is subjected to electrom beam irradiation and then dried in order to evaporate the solvent. The magnetic recording medium prepared has excellent dispersibility of the ferromagnetic fine powder within the binder, which further provides a smooth surface and excellent electrical properties as well as anti-abrasion properties.
摘要翻译：公开了一种制备磁记录介质的方法。该方法包括提供支撑基底和用于基底的特定涂层组合物。该组合物由铁磁粉末，含有能够用电子束照射聚合的化合物的粘合剂和溶剂组成。该组合物在4000sec -1的剪切速度下具有约1至150厘泊的表观粘度。将组合物涂布在支撑基底上之后，涂覆层经受磁性取向。在取向期间或不久之后，对涂层进行电磁辐射照射，然后干燥以蒸发溶剂。制备的磁记录介质具有极好的铁磁细粉在粘合剂中的分散性，这进一步提供了光滑的表面和优异的电性能以及抗磨损性能。

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