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1. 发明授权

US4405481A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4405481A
公开(公告)日：1983-09-20
申请号：US220215
申请日：1980-12-24
申请人： Yasuyuki Yamada , Nobuo Tsuji , Tsutomu Okita , Yasuo Mukunoki
发明人： Yasuyuki Yamada , Nobuo Tsuji , Tsutomu Okita , Yasuo Mukunoki
IPC分类号： C09D5/23 , C09D7/12 , G11B5/708 , G11B5/71 , B05D5/12
CPC分类号： G11B5/7085 , G11B5/71 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257
摘要： A magnetic recording medium containing a ferromagnetic powder, a binder and a lubricant is disclosed. The lubricant comprises (1) abrasive particles having a Mohs' hardness of about 6 or more and a particle size of about 5 microns or less and (2) an ester of an aliphatic acid having 20 to 26 carbon atoms and a monovalent alcohol having 1 to 26 carbon atoms.
摘要翻译：公开了含有铁磁粉末，粘合剂和润滑剂的磁记录介质。润滑剂包括（1）莫氏硬度为约6或更大并且粒度为约5微米或更小的磨料颗粒和（2）具有20至26个碳原子的脂族酸的酯和具有1个至26个碳原子。

2. 发明授权

US4837081A Magnetic recording medium 失效
标题翻译：磁记录介质
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。

3. 发明授权

US4788103A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4788103A
公开(公告)日：1988-11-29
申请号：US39860
申请日：1987-04-20
申请人： Tsutomu Okita , Kazuko Hanai , Yasuyuki Yamada
发明人： Tsutomu Okita , Kazuko Hanai , Yasuyuki Yamada
IPC分类号： C08G18/08 , C09D5/23 , C09D175/00 , C09D175/06 , G11B5/702
CPC分类号： G11B5/7021 , C08G18/0819 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/31609
摘要： A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer containing ferromagnetic fine particles dispersed in a binder including a polyurethane resin containing (1) as a main polymer chain a polyester polyol containing an alcoholic and acid components comprising at least one of (A) at least one alcoholic component selected from alicyclic divalent alcohol and aromatic divalent alcohol in an amount of 50 mol % or more based on the total amount of alcoholic components or (B) at least one acid component selected from alicyclic dicarboxylic acid and aromatic dicarboxylic acid in an amount of 50 mol % or more based on the total amount of acid components, and (2) at least one polyisocyanate selected from tolylene diisocyanate, diphenyl-methane-4,4'-diisocyanate, isophrorone diisocyanate, dicyclohexylmethane-4,4'-diisocyanate, and p-phenylene diisocyanate in an amount of 5 mol % or more based on the total amount of all alcoholic components and all acid components, and further containing (3) a polar group selected from --SO.sub.3 M, --CO.sub.2 M, and --PO.sub.3 M.sub.2, wherein M represents an H, Na, or K atom, in an amount of from 0.03 to 2 wt % based on the total amount of the polyurethane resin.
摘要翻译：描述了一种磁记录介质，其包括非磁性载体，其上设置有包含分散在包含含有（1）主要聚合物链的聚氨酯树脂的粘合剂的粘合剂中的铁磁性细颗粒的磁性层，所述聚酯多元醇含有含有醇和酸组分的聚酯多元醇，（A）至少一种选自脂环族二元醇和芳族二价醇的至少一种醇成分，其量为基于醇组分总量的50mol％或更多，或（B）至少一种选自脂环族的酸成分二羧酸和芳族二羧酸的含量相对于酸成分总量为50摩尔％以上，（2）至少一种选自甲苯二异氰酸酯，二苯基甲烷-4,4'-二异氰酸酯，异佛尔酮二异氰酸酯，二环己基甲烷-4,4'-二异氰酸酯和对苯二异氰酸酯，相对于所有酒精组合物的总量为5摩尔％以上并且还含有（3）选自-SO 3 M，-CO 2 M和-PO 3 M 2的极性基团，其中M代表H，Na或K原子，其量为0.03至2重量％，基于对聚氨酯树脂的总量。

4. 发明授权

US4571364A Magnetic recording medium 失效
标题翻译：磁记录介质
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。

5. 发明授权

US4439486A Magnetic recording medium 失效
标题翻译：磁记录介质
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。

6. 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。

7. 发明授权

US4503120A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4503120A
公开(公告)日：1985-03-05
申请号：US505506
申请日：1983-06-17
申请人： Koichi Yamauchi , Nobuo Tsuji , Yasuyuki Yamada , Shinichi Funabashi , Masatoshi Kiyama
发明人： Koichi Yamauchi , Nobuo Tsuji , Yasuyuki Yamada , Shinichi Funabashi , Masatoshi Kiyama
IPC分类号： C08G18/42 , C09D5/23 , C09D127/00 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/70
CPC分类号： C08G18/4202 , G11B5/7022 , Y10S428/90 , Y10T428/265 , Y10T428/31551 , Y10T428/31565 , Y10T428/31786 , Y10T428/31935
摘要： A magnetic recording medium which comprises a non-magnetic support having thereon a magnetic recording layer containing a ferromagnetic fine powder and a binder as main components is disclosed. The magnetic recording layer containing as the binder (1) a vinyl chloride-vinyl acetate-maleic acid copolymer which has a mean polymerization degree of about 300 to about 400 and a maleic acid fraction of about 0.6 to about 1.5 wt %, (2) a polyurethane resin which has a number average molecular weight of 40,000 to 100,000 and is prepared from (i) a mixture of polyneopentyladipate having a mean molecular weight of 500 to 2,500 and polybutyleneadipate having a mean molecular weight of 500 to 2,500 with a mixing ratio of the former to the latter of from 2/8 to 9/1 by weight and (ii) diphenylmethane diisocyanate, and optionally (3) a low molecular weight polyisocyanate compound.
摘要翻译：公开了一种磁记录介质，其包括其上具有含有铁磁性细粉末和粘合剂作为主要成分的磁记录层的非磁性载体。含有粘合剂（1）的氯乙烯 - 乙酸乙烯酯 - 马来酸共聚物的磁记录层，其平均聚合度为约300至约400，马来酸含量为约0.6至约1.5重量％，（2）数均分子量为40,000〜100,000的聚氨酯树脂，其由（i）平均分子量为500〜2,500的聚己酸己烯酯和平均分子量为500〜2,500的聚己二酸丁二醇酯的混合物与（i）前者为2/8至9/1重量比，（ii）二苯基甲烷二异氰酸酯和任选的（3）低分子量多异氰酸酯化合物。

8. 发明授权

US4343831A Process for producing magnetic recording medium 失效
标题翻译：磁记录介质的制造方法
公开(公告)号：US4343831A
公开(公告)日：1982-08-10
申请号：US243666
申请日：1981-03-13
申请人： Nobuo Tsuji , Goro Akashi , Masaaki Fujiyama , Yasuyuki Yamada
发明人： Nobuo Tsuji , Goro Akashi , Masaaki Fujiyama , Yasuyuki Yamada
IPC分类号： G11B5/70 , C09D5/23 , G11B5/702 , G11B5/842 , B05D3/06
CPC分类号： G11B5/842 , G11B5/7026
摘要： A process for producing a magnetic recording medium is described comprising applying to a support a coating solution which has ferromagnetic particles dispersed in a solution comprising a binder curable by electron beams and a low-boiling point solvent, irradiating the support with electron beam radiation while the particles remain dispersed uniformly, and evaporating the solvent to dryness.
摘要翻译：一种磁记录介质的制造方法，其特征在于，在支撑体上涂布具有分散在由电子束和低沸点溶剂固化的粘合剂的溶液中的铁磁性粒子的涂布液，颗粒保持均匀分散，蒸发溶剂至干。

9. 发明授权

US4336308A Magnetic recording media 失效
标题翻译：磁记录媒体
公开(公告)号：US4336308A
公开(公告)日：1982-06-22
申请号：US74467
申请日：1979-09-11
申请人： Yasuyuki Yamada , Kenichi Masuyama , Nobuo Tsuji
发明人： Yasuyuki Yamada , Kenichi Masuyama , Nobuo Tsuji
IPC分类号： C09D5/23 , G11B5/702 , G11B5/70
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium and, more particularly, a magnetic recording medium based on a magnetic composition exhibiting high dispersibility of finely divided ferromagnetic powders and having excellent abrasion resistance is disclosed wherein the binder for the magnetic composition contains a 2-chloroacrylonitrile polymer and a thermoplastic polyurethane resin; in another embodiment of the invention the binder additionally contains a polyisocyanate.
摘要翻译：公开了一种磁记录介质，更具体地说，一种磁性组合物的粘结剂含有2-氯丙烯腈聚合物和热塑性聚氨酯的磁性组合物，该磁性组合物表现出高分散性的铁磁性粉末并具有优异的耐磨性树脂; 在本发明的另一个实施方案中，粘合剂另外含有多异氰酸酯。

10. 发明授权

US4431700A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4431700A
公开(公告)日：1984-02-14
申请号：US451350
申请日：1982-12-20
申请人： Yasuyuki Yamada , Nobuo Tsuji , Yasuyuki Tanaka , Koichi Yamauchi
发明人： Yasuyuki Yamada , Nobuo Tsuji , Yasuyuki Tanaka , Koichi Yamauchi
IPC分类号： C08G18/42 , C09D5/23 , C09D101/18 , C09D175/00 , C09D175/04 , G11B5/702 , H01F10/02
CPC分类号： G11B5/7022 , C08G18/4202 , Y10S428/90 , Y10T428/265 , Y10T428/31609 , Y10T428/31678 , Y10T428/31721 , Y10T428/31765 , Y10T428/3179 , Y10T428/31971
摘要： The present invention relates to a magnetic recording medium excellent in S/N ratio and abrasion resistance, which comprises a non-magnetic support and a magnetic recording layer coated thereon, consisting of a ferromagnetic fine powder and a binder, in which the binder contains (1) nitrocellulose having an average polymerization degree of 50 to 300 and a nitrification degree of 10.7 to 13 and (2) a polyurethane resin having a number average molecular weight of 40,000 to 100,000, obtained from diphenylmethane diisocyanate and a mixture of polyneopentyl adipate having an average molecular weight of 800 to 2000 and polybutylene adipate having an average molecular weight of 800 to 2000 in a mixing proportion by weight of 2/8 to 9/1.
摘要翻译：本发明涉及一种S / N比和耐磨性优异的磁记录介质，其包括由铁磁细粉和粘合剂构成的非磁性载体和涂覆在其上的磁记录层，其中粘合剂含有 1）平均聚合度为50〜300，硝化度为10.7〜13的硝化纤维素和（2）由二苯基甲烷二异氰酸酯得到的数均分子量为40,000〜100,000的聚氨酯树脂和具有平均分子量为800〜2000，平均分子量为800〜2000的聚己二酸丁二酯的重量比为2/8〜9/1。

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