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公开(公告)号：US4687704A
公开(公告)日：1987-08-18
申请号：US819061
申请日：1986-01-15
CPC分类号： G11B5/7085 , G11B5/714 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257
摘要： A magnetic recording medium such as a video tape comprising a magnetic recording layer which comprises a ferromagnetic metal powder having a specific surface area of not less than 42 m.sup.2 /g and an inorganic material powder having a Mohs' scale of hardness of not less than 5, wherein at least 90 wt. % of said inorganic material powder consists of particles having a particle size of 0.1-0.6 .mu.m, 51-85 wt. % of a portion of said particles consisting of particles having a particle size of less than 0.3 .mu.m, and the residual portion consisting of particles having a particle size of not less than 0.3 .mu.m.
摘要翻译： 一种磁记录介质，例如包括磁记录层的磁记录介质，该磁记录层包括比表面积不小于42m 2 / g的铁磁金属粉末和莫氏硬度不小于5的无机材料粉末 ，其中至少90wt。 所述无机材料粉末的％由粒径为0.1-0.6μm的颗粒组成，51-85wt。 所述颗粒的一部分的一部分由颗粒尺寸小于0.3μm的颗粒组成，剩余部分由粒径不小于0.3μm的颗粒组成。
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公开(公告)号：US4690863A
公开(公告)日：1987-09-01
申请号：US744567
申请日：1985-06-14
CPC分类号： G11B5/714 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/31609 , Y10T428/31935 , Y10T428/31971
摘要： A magnetic recording media comprising a nonmagnetic supporting substrate and a ferromagnetic alloy powder-containing magnetic layer applied onto the surface thereof is produced by:pre-dispersing a ferromagnetic alloy powder with and in a binder, said alloy having a specific surface area (S.sub.BET) of no less than 45 m.sup.2 /g and an absorbed water content of no higher than 1.2% by weight resulting in a pre-dispersion;mixing and dispersing an additional binder with and in the pre-dispersion; andcoating the resultant mixed and dispersed magnetic coating liquid onto said nonmagnetic supporting substrate.
摘要翻译： 通过以下步骤制造包括非磁性支撑基材和施加在其表面上的含铁磁性合金粉末的磁性层的磁记录介质：将具有和在粘合剂中的铁磁性合金粉末预分散，所述合金具有比表面积（SBET） 不小于45m 2 / g，吸收水含量不超过1.2％，导致预分散; 在预分散体中混合和分散另外的粘合剂; 将得到的混合分散的磁性涂布液涂布在所述非磁性支撑基板上。
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公开(公告)号：US4632868A
公开(公告)日：1986-12-30
申请号：US744568
申请日：1985-06-14
IPC分类号： G11B5/706 , C09D5/23 , C09D7/12 , C10M105/24 , C10N10/02 , C10N40/18 , G11B5/70 , G11B5/708 , G11B5/714
CPC分类号： G11B5/714 , G11B5/7013 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/2991
摘要： A magnetic recording medium comprising a nonmagnetic supporting substrate and a magnetic layer provided thereon by a binder, said magnetic layer contains a ferromagnetic alloy powder having a specific surface area (S.sub.BET) of no less than 45 m.sup.2 /g, and copper oleate in an amount of no less than 0.001 part by weight per 100 parts by weight of said ferromagnetic alloy powder.
摘要翻译： 一种包含非磁性支撑基底和由粘合剂在其上设置的磁性层的磁记录介质，所述磁性层含有比表面积（SBET）不小于45m 2 / g的铁磁性合金粉末， 每100重量份所述铁磁合金粉末不少于0.001重量份。
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公开(公告)号：US4952458A
公开(公告)日：1990-08-28
申请号：US346328
申请日：1989-04-28
CPC分类号： G11B5/708 , G11B5/71 , G11B5/714 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/30
摘要： A magnetic recording medium comprising a nonmagnetic support and a magnetic recording layer provided on said support, in which said magnetic recording layer comprises:a ferromagnetic metal powder having a specific surface area of not less than 40 m.sup.2 /g;a fatty acid having a melting point of lower than 50.degree. C.;a fatty acid having a melting point of not lower than 50.degree. C.; anda fatty acid ester.
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，其中所述磁记录层包括：比表面积不小于40m 2 / g的强磁性金属粉末; 一种熔点低于50℃的脂肪酸; 一种熔点不低于50℃的脂肪酸; 和脂肪酸酯。
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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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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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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：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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