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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。
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公开(公告)号：US4784907A
公开(公告)日：1988-11-15
申请号：US944068
申请日：1986-12-22
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , C10M107/46 , C10N40/18 , G11B5/702 , G11B5/708 , G11B5/71
CPC分类号： G11B5/71 , G11B5/7023 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/31609 , Y10T428/31935
摘要： In a magnetic recording medium such as a video tape comprising a nonmagnetic support and a magnetic recording layer provided on the support, said magnetic recording layer comprising a binder and a ferromagnetic powder dispersed therein, the improvement in which:the magnetic recording layer comprises a fatty acid ester lubricant and a lubricant other than the fatty acid ester lubricant;the binder is composed of a resin component comprising a resin containing a repeating unit which has a polar group and having a glass transition point of not lower than 50.degree. C., and a resin containing a repeating unit which has a polar group and having a glass transition point of lower than 50.degree. C; andat least one resin of the resins contains a repeating unit having a polar group such as --SO.sub.3 M, --OSO.sub.3 M or --PO(OM').sub.2, wherein M is hydrogen or an alkali metal atom, and M' is hydrogen, an alkali metal atom or a lower hydrocarbon group.
摘要翻译： 在诸如包括非磁性载体和设置在载体上的磁记录层的录像带的磁记录介质中，所述磁记录层包括粘合剂和分散在其中的铁磁粉末，其改进在于：磁记录层包含脂肪 酸酯润滑剂和脂肪酸酯润滑剂以外的润滑剂; 粘合剂由包含含有极性基团并且玻璃化转变温度不低于50℃的重复单元的树脂的树脂组分和含有极性基团并具有极性基团的重复单元的树脂组成 玻璃化转变点低于50℃; 并且所述树脂的至少一种树脂含有具有极性基团的重复单元，例如-SO 3 M，-OSO 3 M或-PO（OM'）2，其中M为氢或碱金属原子，M'为氢，碱 金属原子或低级烃基。
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公开(公告)号：US4784914A
公开(公告)日：1988-11-15
申请号：US944114
申请日：1986-12-22
IPC分类号： C08G18/08 , C08L75/04 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702
CPC分类号： G11B5/7022 , C08G18/0819 , C08L75/04 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/31529 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium comprising a nonmagnetic support and a magnetic recording layer provided on the support, said magnetic recording layer comprising a binder and a ferromagnetic powder dispersed therein, which is characterized in that said binder is composed of a resin component comprising:a vinyl chloride copolymer containing a repeating unit having at least one polar group selected from the group consisting of --SO.sub.3 M, --OSO.sub.3 M, --COOM and --PO(OM').sub.2, wherein M is hydrogen or an alkali metal atom, and M' is any one of hydrogen, an alkali metal atom and a lower hydrocarbon group, and a repeating unit having an epoxy group; anda polyurethane resin containing a repeating unit having at least one polar group selected from the group consisting of --SO.sub.3 M, --OSO.sub.3 M, --COOM and --PO(OM').sub.2, wherein M and M' have the same meanings as defined above.
摘要翻译： 一种磁记录介质，包括设置在所述载体上的非磁性载体和磁记录层，所述磁记录层包含粘合剂和分散在其中的铁磁性粉末，其特征在于，所述粘合剂由树脂组分构成，所述树脂组分包括：氯乙烯 含有具有至少一个选自-SO 3 M，-OSO 3 M，-COOM和-PO（OM'）2的极性基团的重复单元的共聚物，其中M是氢或碱金属原子，M'是任何一个 的氢，碱金属原子和低级烃基，以及具有环氧基的重复单元; 和含有至少一个选自-SO 3 M，-OSO 3 M，-COOM和-PO（OM'）2的极性基团的重复单元的聚氨酯树脂，其中M和M'具有与上述相同的含义。
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公开(公告)号：US4798755A
公开(公告)日：1989-01-17
申请号：US857872
申请日：1986-05-01
申请人： Yasuyuki Yamada , Hajime Miyatsuka
发明人： Yasuyuki Yamada , Hajime Miyatsuka
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/24355 , Y10T428/24942 , Y10T428/256 , Y10T428/257 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium is disclosed, comprising a non-magnetic support having provided on one side thereof a magnetic recording layer comprising a binder having dispersed therein fine ferromagnetic particles and on the other side thereof a backing layer, wherein at least one of said magnetic layer and backing layer contains (1) a vinyl chloride resin having --SO.sub.3 M (wherein M is Li, Na, or K) groups and epoxy groups, and (2) polyurethane as binders. The medium has reduced output variation and improved running durability.
摘要翻译： 公开了一种磁记录介质，其包括非磁性载体，该非磁性载体的一侧设置有磁记录层，所述磁记录层包括分散有细小铁磁性颗粒的粘合剂，其另一侧具有背衬层，其中所述磁性层 背衬层含有（1）具有-SO 3 M（其中M为Li，Na或K）基团和环氧基的氯乙烯树脂，和（2）作为粘合剂的聚氨酯。 该介质具有减少的输出变化和改善的运行耐久性。
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公开(公告)号：US4407901A
公开(公告)日：1983-10-04
申请号：US300823
申请日：1981-09-10
申请人： Hajime Miyatsuka , Akira Kasuga , Yasuyuki Yamada
发明人： Hajime Miyatsuka , Akira Kasuga , Yasuyuki Yamada
CPC分类号： G11B5/702 , Y10S428/90 , Y10T428/2998
摘要： A magnetic recording medium is disclosed comprising a non-magnetic base bearing a magnetic layer mainly consisting of ferromagnetic particles and a binder wherein the magnetic layer contains a polymer having a polar functional group and a degree of polymerization of not more than 100.
摘要翻译： 公开了一种磁记录介质，其包括：非磁性基座，其承载主要由铁磁颗粒和粘合剂组成的磁性层，其中所述磁性层含有具有极性官能团和聚合度不超过100的聚合物。
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6.发明授权Ferromagnetic metal particles of iron alloyed with Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Si, P, Mo, Sn, Sb and Ag coated with mono- or dialkoxysilanes 失效与单或双烷氧基硅烷涂覆的Ti，V，Cr，Mn，Co，Ni，Cu，Zn，Si，P，Mo，Sn，Sb和Ag合金的铁磁性金属颗粒
公开(公告)号：US4475946A
公开(公告)日：1984-10-09
申请号：US530436
申请日：1983-09-08
CPC分类号： B22F1/02 , H01F1/061 , Y10S428/90 , Y10T428/256 , Y10T428/2991 , Y10T428/2995
摘要： Ferromagnetic metal particles are disclosed, which have a silane compound on the surface thereof. The silane compound is represented by the formula:R.sub.n --Si--(OR').sub.4-nwherein R and R' each represent an alkyl group and n represents 2 or 3. The ferromagnetic metal particles have excellent oxidation stability and corrosion resistance. Furthermore, the ferromagnetic metal particles have good dispersibility within a binder when used in connection with producing a magnetic recording medium.
摘要翻译： 公开了在其表面上具有硅烷化合物的铁磁金属颗粒。 硅烷化合物由下式表示：Rn-Si-（OR'）4-n其中R和R'各自表示烷基，n表示2或3.铁磁性金属颗粒具有优异的氧化稳定性和耐腐蚀性。 此外，当与生产磁记录介质一起使用时，铁磁金属颗粒在粘合剂中具有良好的分散性。
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公开(公告)号：US4437882A
公开(公告)日：1984-03-20
申请号：US517304
申请日：1983-07-26
CPC分类号： H01F1/065 , B22F1/02 , B22F9/22 , C22C33/0285 , G11B5/70615 , H01F1/061
摘要： A ferromagnetic powder and process for producing it are disclosed. The process involves providing reducing a nickel-doped or nickel-coated iron compound in a reducing gas to provide a reduced metal powder including nickel in an amount of 3 to 30 atomic % based on the atomic % of iron present in the reduced metal powder, and treating the reduced metal powder with an organic metal powder. The resulting ferromagnetic metal powder has excellent stability with respect to oxidation and has a high saturation magnetization.
摘要翻译： 公开了一种铁磁粉末及其制造方法。 该方法包括在还原气体中还原镍掺杂或镀镍的铁化合物，以提供还原金属粉末，其中还原金属粉末包含以还原金属粉末中存在的铁的原子％为3至30原子％的量， 并用有机金属粉末处理还原的金属粉末。 所得铁磁性金属粉末相对于氧化具有优异的稳定性，并具有高的饱和磁化强度。
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公开(公告)号：US4411956A
公开(公告)日：1983-10-25
申请号：US347810
申请日：1982-02-11
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31678 , Y10T428/31971
摘要： A magnetic recording medium having a non-magnetic base overlaid with a magnetic layer containing ferromagnetic particles is disclosed. The ferromagnetic particles are metal particles and the binder is composed of (a) a nitrocellulose and (b) a polyurethane resin.
摘要翻译： 公开了一种具有覆盖有包含铁磁颗粒的磁性层的非磁性基底的磁记录介质。 铁磁颗粒是金属颗粒，粘合剂由（a）硝化纤维素和（b）聚氨酯树脂组成。
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9.发明授权
公开(公告)号：US5030521A
公开(公告)日：1991-07-09
申请号：US183875
申请日：1988-04-20
申请人： Yasuo Nishikawa , Takao Ohya , Hajime Miyatsuka
发明人： Yasuo Nishikawa , Takao Ohya , Hajime Miyatsuka
IPC分类号： G11B5/708 , C09D5/23 , C09D127/04 , C09D127/06 , C09D131/04 , G11B5/702 , G11B5/71 , G11B5/72 , G11B5/725
摘要： A magnetic recording medium comprises a nonmagnetic support and a magnetic recording layer containing a ferromagnetic powder which is provided on the support. The magnetic recording layer contains a binder resin having a acid residue or a salt thereof and a fatty acid ester compound having the formula (I): ##STR1## wherein R is a hydrocarbon group having 11-21 carbon atoms, R.sup.1 is hydrogen atom or a hydrocarbon group having 1-3 carbon atoms, and R.sup.2 and R.sup.3 are the same or different and each is a hydrocarbon group having 1-8 carbon atoms. The total number of carbon atoms contained in R.sup.1, R.sup.2 and R.sup.3 being not less than 3 carbon atoms. Alternatively, the fatty acid ester can be coated on the magnetic layer.
摘要翻译： 磁记录介质包括非磁性载体和含有设置在载体上的铁磁性粉末的磁记录层。 磁记录层含有具有酸残基或其盐的粘合剂树脂和具有式（I）的脂肪酸酯化合物：其中R是具有11-21个碳原子的烃基，R1是 氢原子或具有1-3个碳原子的烃基，R2和R3相同或不同，并且各自为具有1-8个碳原子的烃基。 R1，R2和R3中含有的碳原子总数不少于3个碳原子。 或者，脂肪酸酯可以涂覆在磁性层上。
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公开(公告)号：US4687705A
公开(公告)日：1987-08-18
申请号：US731806
申请日：1985-05-08
CPC分类号： G11B5/712 , Y10S428/90 , Y10T428/257 , Y10T428/2995 , Y10T428/2998
摘要： A magnetic recording medium is disclosed which comprises a non-magnetic support having provided thereon a magnetic layer containing ferromagnetic metal particles and a binder, wherein the ferromagnetic metal particles have a specific surface area of 30 m.sup.2 /g or more, and a saturation magnetization of 120 emu/g or more and have been surface-treated with an organic compound. Also, a magnetic recording medium is disclosed which comprises a non-magnetic support having provided thereon a magnetic layer containing ferromagnetic particles and a binder, wherein the ferromagnetic particles have been surface-treated with an organic compound and the binder has essentially no functional groups which adsorb onto ferromagnetic metal particles.
摘要翻译： 公开了一种磁记录介质，其包括在其上设置有含有铁磁性金属颗粒和粘合剂的磁性层的非磁性载体，其中所述强磁性金属颗粒的比表面积为30m 2 / g以上，饱和磁化强度为 120emu / g以上，并用有机化合物进行表面处理。 此外，公开了一种磁记录介质，其包括在其上设置有含有铁磁颗粒和粘合剂的磁性层的非磁性载体，其中铁磁颗粒已经用有机化合物进行表面处理，并且粘合剂基本上没有官能团， 吸附在铁磁性金属颗粒上。
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