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1. 发明授权

US4391851A Process for producing a magnetic recording medium 失效
标题翻译：磁记录介质的制造方法
公开(公告)号：US4391851A
公开(公告)日：1983-07-05
申请号：US353791
申请日：1982-03-02
申请人： Yasuyuki Yamada , Goro Akashi , Nobuo Tsuji , Yoshito Mukaida , Masaaki Fujiyama
发明人： Yasuyuki Yamada , Goro Akashi , Nobuo Tsuji , Yoshito Mukaida , Masaaki Fujiyama
IPC分类号： G11B5/842 , G11B5/702 , G11B5/84 , H01F10/02
CPC分类号： G11B5/84 , G11B5/7021
摘要： A process for producing a magnetic recording medium is disclosed. The process involves coating a non-magnetic base with magnetic coating solution containing fine ferromagnetic particles and a binder comprising nitrocellulose, polyol and an isocyanate having at least two isocyanato groups. In the process, the web having 0.3 to 3 wt % of the residual solvent in the magnetic layer is calendered, and the calendered web is then dried thoroughly.
摘要翻译：公开了一种制造磁记录介质的方法。该方法包括用含有细铁磁颗粒的磁性涂层溶液和包含硝化纤维素，多元醇和具有至少两个异氰酸酯基的异氰酸酯的粘合剂涂覆非磁性碱。在该方法中，将磁性层中的残留溶剂的0.3〜3重量％的纤维网压延，然后将压延纤维网彻底干燥。

2. 发明授权

US4444838A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4444838A
公开(公告)日：1984-04-24
申请号：US387129
申请日：1982-06-10
申请人： Yasuyuki Yamada , Goro Akashi , Nobuo Tsuji , Yoshito Mukaida
发明人： Yasuyuki Yamada , Goro Akashi , Nobuo Tsuji , Yoshito Mukaida
IPC分类号： C08G18/64 , C09D5/23 , G11B5/702 , G11B5/70
CPC分类号： C08G18/6484 , G11B5/7022 , Y10S428/90 , Y10T428/264 , Y10T428/265 , Y10T428/31609 , Y10T428/31826 , Y10T428/31931
摘要： A magnetic recording medium which comprises on a support base having coated thereon a magnetic layer containing a binder and a ferromagnetic fine powder dispersed in the binder is disclosed. The binder is comprised of a cellulose derivative having a residual OH group in a proportion of 7.5 to 40%, a diolefin or olefin series synthetic rubber and a polyisocyanate compound. The medium has excellent video sensitivity and video signal to noise ratio. The medium of the invention also have improved abrasion resistance.
摘要翻译：公开了一种磁记录介质，其包括在其上涂覆有包含粘合剂的磁性层的支撑基底和分散在粘合剂中的铁磁细粉末。粘合剂由具有7.5〜40％的残留OH基的纤维素衍生物，二烯烃或烯烃系合成橡胶和多异氰酸酯化合物构成。该介质具有出色的视频灵敏度和视频信噪比。本发明的介质也具有改善的耐磨性。

3. 发明授权

US4132827A Magnetic recording substance 失效
标题翻译：磁记录物质
公开(公告)号：US4132827A
公开(公告)日：1979-01-02
申请号：US760269
申请日：1977-01-18
申请人： Yoshito Mukaida , Masaaki Fujiyama , Shigeo Komine , Masaaki Igarashi , Nobutaka Yamaguchi , Shinobu Iida , Akira Kasuga
发明人： Yoshito Mukaida , Masaaki Fujiyama , Shigeo Komine , Masaaki Igarashi , Nobutaka Yamaguchi , Shinobu Iida , Akira Kasuga
IPC分类号： C09C1/48 , C09D5/23 , C09D7/12 , G11B5/708 , G11B5/72 , H01F10/02 , B32B27/20
CPC分类号： G11B5/708 , G11B5/72 , Y10S428/90 , Y10T428/257 , Y10T428/30
摘要： In a magnetic recording substance comprising a non-magnetic support and a magnetic recording layer provided on the support, carbon black having a surface area of at least 700 m.sup.2 /g and an oil absorption of at least 300 ml (DBP)/100 g is contained in the magnetic layer thereby lowering the surface electric resistance without deteriorating the characteristics of the magnetic recording layer.
摘要翻译：在包含非磁性载体和设置在载体上的磁记录层的磁记录物质中，表面积至少为700m 2 / g，吸油量至少为300ml（DBP）/ 100g的炭黑为磁性层中含有，从而降低表面电阻，而不会降低磁记录层的特性。

4. 发明授权

US4699844A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4699844A
公开(公告)日：1987-10-13
申请号：US598097
申请日：1984-04-09
申请人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida
发明人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/14 , G11B5/702 , G11B5/78
CPC分类号： G11B5/7026 , G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium comprised of a support base having a magnetic recording provided thereon is disclosed. The recording layer is comprised of ferromagnetic particles dispersed in a binder. The binder includes (1) a vinyl chloride-vinyl alkanoate type copolymer containing --CO.sub.2 H group of 5.times.10.sup.-5 to 1.7.times.10.sup.-3 equivalent per g of the polymer, (2) urethane acrylate having a molecular weight in the range of from 20,000 to 300,000, and (3) a compound having at least two (meth)acryloyl groups in the molecule and having a molecular weight of 600 or less. The magnetic recording layer is irradiated with electron beams in order to harden the binder. The resulting medium has excellent electromagnetic properties and the magnetic coating composition prepared for making the magnetic recording layer has excellent stability during storage.
摘要翻译：公开了一种磁记录介质，包括其上提供有磁记录的支撑基座。记录层由分散在粘合剂中的铁磁颗粒组成。粘合剂包括（1）含有每10克聚合物5×10-5至1.7×10-3当量的-CO 2 H基的氯乙烯 - 乙烯基链烷酸酯型共聚物，（2）分子量范围为20,000至 300,000，和（3）在分子中具有至少两个（甲基）丙烯酰基并且分子量为600以下的化合物。用电子束照射磁记录层，以使粘合剂硬化。所得到的介质具有优异的电磁特性，并且制备用于制备磁记录层的磁性涂料组合物在储存期间具有优异的稳定性。

5. 发明授权

US4576866A Magnetic recording material 失效
标题翻译：磁记录材料
公开(公告)号：US4576866A
公开(公告)日：1986-03-18
申请号：US592671
申请日：1984-03-23
申请人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida
发明人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida
IPC分类号： C08L75/16 , C09D5/23 , C09D101/18 , C09D127/04 , C09D127/06 , C09D175/04 , G11B5/702 , G11B5/70
CPC分类号： G11B5/7026 , C08L75/16 , G11B5/7022 , Y10S428/90 , Y10T428/265 , Y10T428/31609 , Y10T428/31935
摘要： There is provided a magnetic recording material which comprises a support and a magnetic layer coated thereon. The magnetic layer contains as its binder, a combination of at least one vinyl chloride-vinyl acetate-based copolymer characterized by its --CO.sub.2 H content or cellulose dinitrate, at least one urethane acrylate having a particular chemical structure, and at least one low molecular weight compound having two or more acryloyl or methacryloyl groups. The magnetic layer is hardened by beam irradiation. Thus, marked increase in dispersibility of ferromagnetic powders, improvement in electromagnetic transformation characteristics and sharp increase in durability are attained.
摘要翻译：提供了一种磁记录材料，其包括载体和涂覆在其上的磁性层。磁性层包含作为其粘合剂的至少一种以其-CO 2 H含量或硝酸纤维素为特征的氯乙烯 - 乙酸乙烯酯基共聚物，至少一种具有特定化学结构的氨基甲酸酯丙烯酸酯和至少一种低分子量具有两个以上丙烯酰基或甲基丙烯酰基的化合物。磁性层通过光束照射而硬化。因此，铁磁粉末的分散性显着增加，电磁转变特性的提高和耐久性急剧增加。

6. 发明授权

US4621027A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4621027A
公开(公告)日：1986-11-04
申请号：US666081
申请日：1984-10-29
申请人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida , Hiroshi Hashimoto , Teruo Nakagawa , Akiyoshi Hashimoto , Takahisa Ogasawara, deceased
发明人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida , Hiroshi Hashimoto , Teruo Nakagawa , Akiyoshi Hashimoto , Takahisa Ogasawara, deceased
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/70
CPC分类号： G11B5/7023 , G11B5/7021 , G11B5/7022 , G11B5/7026 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium is described, comprising a support and a magnetic layer disposed thereon, said magnetic layer containing as its binder component a combination of at least one member of each of the following groups of compounds (1) to (3) that has been exposed to electron beams:(1) vinyl chloride type resin, vinyl acetate type resin, vinyl chloride-vinyl acetate type resin, each containing from 5.times.10.sup.-5 to 2.times.10.sup.-3 equivalents of --CO.sub.2 H groups per gram of copolymer, and nitrocellulose resin;(2) urethane resins and urethane-acrylate oligomers; and(3) compounds containing an isocyanurate ring and at least two groups selected from acryloyl and methacryloyl groups.
摘要翻译：描述了一种磁记录介质，其包括支撑体和设置在其上的磁性层，所述磁性层包含作为其粘合剂组分的化合物（1）至（3）的以下各组中的至少一个的组合，暴露于电子束：（1）氯乙烯类树脂，乙酸乙烯酯型树脂，氯乙烯 - 乙酸乙烯酯型树脂，每克共聚物含有5×10-5至2×10-3当量的-CO 2 H基，硝基纤维素树脂; （2）聚氨酯树脂和氨基甲酸酯丙烯酸酯低聚物; 和（3）含有异氰脲酸酯环和至少两个选自丙烯酰基和甲基丙烯酰基的基团的化合物。

7. 发明授权

US4548873A Magnetic recording media with oxyfatty acid lubricant 失效
标题翻译：具有含氧酸润滑剂的磁记录介质
公开(公告)号：US4548873A
公开(公告)日：1985-10-22
申请号：US538725
申请日：1983-10-03
申请人： Nobuyuki Yamamoto , Yoshito Mukaida , Nobuo Tsuji , Yuzo Higaki , Toshihisa Okamura
发明人： Nobuyuki Yamamoto , Yoshito Mukaida , Nobuo Tsuji , Yuzo Higaki , Toshihisa Okamura
IPC分类号： G11B5/72 , C09D5/23 , C09D7/12 , C10M105/24 , C10N40/18 , G11B5/71 , G11B5/725 , G11B5/73 , G11B5/733 , G11B5/70
CPC分类号： G11B5/71 , Y10S428/90
摘要： A magnetic recording medium is disclosed. The medium is comprised of a support and a magnetic layer provided thereon wherein an oxyfatty acid is incorporated in the magnetic layer or in the surface of a support or layer coming into contact with the magnetic layer. The coefficients of friction of the magnetic layer with parts of a magnetic recording/reproducing deck are low and thus the magnetic recording medium has superior lubricity.
摘要翻译：公开了一种磁记录介质。介质由支撑体和设置在其上的磁性层组成，其中含氧脂肪酸被结合到磁性层中或与磁性层接触的载体或层的表面中。磁性层与磁记录/再现板的部分的摩擦系数低，因此磁记录介质具有优异的润滑性。

8. 发明授权

US4690870A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4690870A
公开(公告)日：1987-09-01
申请号：US654290
申请日：1984-09-25
申请人： Tsutomu Okita , Nobuo Tsuji , Hiroshi Hashimoto , Yoshito Mukaida
发明人： Tsutomu Okita , Nobuo Tsuji , Hiroshi Hashimoto , Yoshito Mukaida
IPC分类号： C09D5/23 , C09D101/18 , C09D127/04 , C09D127/06 , C09D175/04 , C09D175/14 , G11B5/702
CPC分类号： G11B5/7026 , G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935 , Y10T428/31971
摘要： A magnetic recording medium comprising a non-magnetic support having thereon an electron-beam radiation-cured magnetic recording layer, said magnetic layer comprising a ferromagnetic oxide and a binder comprising(1) a resin selected from the group consisting of a vinyl resin containing a carboxylic group in an amount of about 5.times.10.sup.-5 to 2.times.10.sup.-3 equivalent per gram and a nitrocellulose resin;(2) an urethane resin having at least one terminal acrylate group in the main chain or in a side chain of the molecule; and(3) a compound having at least one acryloyl group which is obtained by modifying the isocyanate group of a polyisocyanate having at least two isocyanate groups per molecule.
摘要翻译：一种磁记录介质，包括其上具有电子束辐射固化磁记录层的非磁性载体，所述磁性层包含铁磁性氧化物和粘合剂，所述粘合剂包括（1）选自乙烯基树脂中的树脂，羧基的量为约5×10-5至2×10-3当量/克和硝酸纤维素树脂; （2）在分子的主链或侧链中具有至少一个末端丙烯酸酯基团的聚氨酯树脂; 和（3）具有至少一个丙烯酰基的化合物，其通过每分子具有至少两个异氰酸酯基团的多异氰酸酯的异氰酸酯基进行改性而获得。

9. 发明授权

US4672002A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4672002A
公开(公告)日：1987-06-09
申请号：US598098
申请日：1984-04-09
申请人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida
发明人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida
IPC分类号： C09D5/23 , G11B5/702
CPC分类号： G11B5/7026 , G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium comprising a support having coated thereon a magnetic layer is disclosed. The magnetic layer contains, as a binder, a composition cured with electron beam comprising (a) at least one of vinyl chloride-vinyl acetate type resins containing 5.times.10.sup.-5 to 1.7.times.10.sup.-3 equivalents of a carboxyl group per gram of the polymer and introcellulose resins, (b) a urethane resin and (c) at least one compound selected from the group consisting of aromatic or alicyclic compounds containing at least two vinyl linkages in the molecule and acryloyl-modified polyisocyanate compounds. The magnetic recording medium has excellent electromagnetic properties and durability.
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。磁性层含有电子束固化的组合物，该组合物包含（a）每克聚合物含有5×10-5至1.7×10-3当量的羧基的氯乙烯 - 乙酸乙烯酯型树脂中的至少一种，和内层纤维素树脂，（b）聚氨酯树脂和（c）至少一种选自分子中含有至少两个乙烯基键的芳族或脂环族化合物的化合物和丙烯酰基改性的多异氰酸酯化合物。磁记录介质具有优异的电磁特性和耐久性。

10. 发明授权

US4664979A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4664979A
公开(公告)日：1987-05-12
申请号：US647564
申请日：1984-09-05
申请人： Yasuyuki Yamada , Yoshito Mukaida
发明人： Yasuyuki Yamada , Yoshito Mukaida
IPC分类号： C09D5/23 , C09D109/02 , C09D121/00 , C09D127/04 , C09D127/06 , C09D171/00 , C09D171/12 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/73
CPC分类号： G11B5/7023 , G11B5/7022 , Y10S428/90 , Y10T428/31511 , Y10T428/31529 , Y10T428/31609 , Y10T428/31826 , Y10T428/31931 , Y10T428/31935
摘要： A magnetic recording medium comprising a magnetic layer on a non-magnetic base, said magnetic layer containing ferromagnetic particles and a binder comprising (a) a copolymer of at least vinyl chloride and vinyl acetate, (b) a synthetic rubber selected from the group consisting of diolefinic and olefinic synthetic rubbers and (c) a resin selected from the group consisting of phenoxy resin and polyhydroxy ether ester resin.
摘要翻译：一种磁记录介质，包括在非磁性基底上的磁性层，所述磁性层含有铁磁颗粒和粘合剂，所述粘合剂包含（a）至少氯乙烯和乙酸乙烯酯的共聚物，（b）选自以下的合成橡胶：的二烯烃和烯烃合成橡胶，和（c）选自苯氧基树脂和多羟基醚酯树脂的树脂。

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